CN115181428A - Organic silicon composite material and preparation method and application thereof - Google Patents
Organic silicon composite material and preparation method and application thereof Download PDFInfo
- Publication number
- CN115181428A CN115181428A CN202211024572.4A CN202211024572A CN115181428A CN 115181428 A CN115181428 A CN 115181428A CN 202211024572 A CN202211024572 A CN 202211024572A CN 115181428 A CN115181428 A CN 115181428A
- Authority
- CN
- China
- Prior art keywords
- parts
- tungsten powder
- radiation
- composite material
- coupling agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 88
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 37
- 239000010703 silicon Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 172
- 239000002245 particle Substances 0.000 claims abstract description 84
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 33
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 27
- 230000005855 radiation Effects 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 84
- 239000003795 chemical substances by application Substances 0.000 claims description 52
- 238000004073 vulcanization Methods 0.000 claims description 45
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000003921 oil Substances 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 17
- 229910052582 BN Inorganic materials 0.000 claims description 14
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 14
- 239000007822 coupling agent Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 229920002545 silicone oil Polymers 0.000 claims description 11
- 239000004945 silicone rubber Substances 0.000 claims description 10
- 239000006082 mold release agent Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 150000001639 boron compounds Chemical group 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 description 21
- 239000000741 silica gel Substances 0.000 description 20
- 229910002027 silica gel Inorganic materials 0.000 description 20
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 18
- 239000000843 powder Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 238000001816 cooling Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 229910052721 tungsten Inorganic materials 0.000 description 9
- 239000010937 tungsten Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 231100000956 nontoxicity Toxicity 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- -1 KH-172 Chemical compound 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- YRXICXUINRGLJP-UHFFFAOYSA-N hydroxy(dimethyl)silicon Chemical compound C[Si](C)O YRXICXUINRGLJP-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 235000004692 Eucalyptus globulus Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
- G21F1/103—Dispersions in organic carriers
- G21F1/106—Dispersions in organic carriers metallic dispersions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0887—Tungsten
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of radiation-proof materials, in particular to an organic silicon composite material and a preparation method and application thereof. The organic silicon composite material comprises the following components in parts by weight: 100 parts of silicon rubber, 500-1800 parts of radiation-proof particles, 1-5 parts of filler and an auxiliary agent; wherein, every 100 parts of radiation-proof particles comprise 70-80 parts of first tungsten powder, 10-15 parts of second tungsten powder and 5-10 parts of third tungsten powder, the Fisher particle size of the first tungsten powder is 15-20 mu m, and the tap density is more than or equal to 12.5g/cm 3 The Fisher-Tropsch particle size of the second tungsten powder is 5-10 mu m, and the tap density is more than or equal to 10.5g/cm 3 The Fisher size of the third tungsten powder is 2-3 mu m, and the tap density is more than or equal to 9.5g/cm 3 . The silicone composite material provided above hasToxic and environment-friendly, and can improve the radiation shielding property and the mechanical property.
Description
Technical Field
The invention relates to the field of radiation-proof materials, in particular to an organic silicon composite material and a preparation method and application thereof.
Background
With the increasing development of various basic researches and technologies around nuclear energy and ray application in the fields of nuclear power energy, medical detection, military wars, aerospace, civil security and the like, ray protection is increasingly important. Therefore, nuclear ray shielding materials capable of effectively reducing radiation hazards also become one of research hotspots with social value and economic value.
The traditional nuclear ray shielding material is mainly metal lead and a polymer composite material thereof, has good energy absorption characteristic and has good shielding effect on low-energy and high-energy X rays and gamma rays. And the cost is low and the processing is easy. However, metallic lead itself has a low melting point and is biologically toxic, and metallic lead forms lead vapor at a higher temperature, resulting in lead-containing exhaust gas. The waste gas, waste water, waste residue and the like containing lead can pollute the atmosphere, water sources and crops and seriously endanger the health of human bodies.
Disclosure of Invention
Based on the above, there is a need for a non-toxic and environment-friendly organic silicon composite material capable of improving radiation shielding property and mechanical property, and a preparation method and application thereof.
The invention provides an organic silicon composite material which comprises the following components in parts by weight:
100 parts of silicon rubber, 500-1800 parts of radiation-proof particles, 1-5 parts of filler and an auxiliary agent; wherein, every 100 parts of the radiation-proof particles comprise 70-80 parts of first tungsten powder, 10-15 parts of second tungsten powder and 5-10 parts of third tungsten powder, and the Fisher of the first tungsten powderThe particle size is 15-20 μm, and the tap density is more than or equal to 12.5g/cm 3 The Fisher-Tropsch particle size of the second tungsten powder is 5-10 mu m, and the tap density is more than or equal to 10.5g/cm 3 The Fisher particle size of the third tungsten powder is 2-3 mu m, and the tap density is more than or equal to 9.5g/cm 3 。
In one embodiment, each 100 parts of the radiation-proof particles further comprise 1-5 parts of fourth tungsten powder, the Fisher size of the fourth tungsten powder is 0.1-1 mu m, and the tap density is more than or equal to 7.5g/cm 3 。
In one embodiment, the filler is a boron compound and/or white carbon;
optionally, the boron compound comprises one or more of hexagonal boron nitride, cubic boron nitride, and boron carbide.
In one embodiment, the hardness of the silicone rubber is Shore A30-Shore A65.
In one embodiment, the auxiliary agent comprises one or more of a vulcanizing agent, an internal mold release agent, a coupling agent, and a processing oil;
optionally, in the organosilicon composite material, the vulcanizing agent is 0.5-1.5 parts by weight, the internal mold release agent is 0.05-5 parts by weight, the coupling agent is 2-10 parts by weight, and the processing oil is 0.1-5 parts by weight.
In one embodiment, the sulfiding agent comprises one or more of a bis 2,4 sulfiding agent, a bis 2,5 sulfiding agent, and a platinum sulfiding agent.
In one embodiment, the internal release agent comprises one or more of an internal release agent FC-606, an internal release agent BL, an internal release agent TMV, and an internal release agent WS 280P.
In one embodiment, the silane coupling agent is one or more of Si-69, KH-560, KH-570, KH-590, KH-172, KBM-403, A-171 and A-172.
In one embodiment, the processing oil is a silicone oil;
optionally, the silicone oil comprises one or more of dimethylhydroxysilicone oil, dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.
In one aspect of the present invention, there is also provided a method for preparing the above-mentioned silicone composite material, which includes the following steps:
and weighing the silicon rubber, the radiation-proof particles, the filler and the auxiliary agent according to the weight parts, mixing, banburying and vulcanizing.
In one embodiment, the banburying temperature is 30-60 ℃.
In one embodiment, the vulcanization parameters are specified as follows:
first vulcanizing at 150-180 deg.c for 10-30 min and then vulcanizing at 180-210 deg.c for 2-16 hr.
In another aspect of the present invention, a radiation-proof shielding material is further provided, which is prepared from the above-mentioned silicone composite material.
In another aspect of the present invention, a radiation protection product is provided, which includes the radiation protection shielding material described above.
The organic silicon composite material provided by the invention adopts tungsten powder as radiation-proof particles, traditional lead powder is omitted, the radiation-proof shielding property of the organic silicon composite material is improved, and the tungsten powder is free of biotoxicity, cannot pollute the environment, and has the advantages of no toxicity, environmental friendliness and the like.
And the radiation protection particles adopted by the invention are not single specification or general tungsten powder with large-range granularity, but tungsten powder (first tungsten powder, second tungsten powder and third tungsten powder) with various specific specification sizes and tap densities are compounded according to a certain proportion. Silicon rubber is used as a base material, a network structure can be formed around the radiation-proof particles, the radiation-proof particles are dispersed and filled in the silicon rubber base, and tungsten powder with small particle size can be fully filled in gaps formed among tungsten powder with large particle size, so that gaps among tungsten powder with large particle size can be avoided, the density of the radiation-proof particles can be effectively improved through the cooperation effect among tungsten powder with different particle size, and the prepared organic silicon composite material has high radiation-proof performance and good mechanical performance on the basis of adding a small amount of radiation-proof particles.
In addition, gaps formed by tungsten powder with large particle size can be filled with tungsten powder with small particle size, but the tungsten powder with small particle size is added to a certain degree, so that the tungsten powder with large particle size is separated, and the porosity of the radiation-proof particles is too large. Through specific selection of tap densities of the first tungsten powder, the second tungsten powder and the third tungsten powder, the first tungsten powder, the second tungsten powder and the third tungsten powder can be mixed more uniformly, the porosity of the radiation-proof particles is minimized, and therefore the radiation-proof effect of the organic silicon composite material is further improved, and meanwhile, the reduction of the mechanical property of the organic silicon composite material is avoided.
In conclusion, the organic silicon composite material has the advantages of no toxicity and environmental protection. Moreover, on the basis of adding less tungsten powder, the composite material has high radiation resistance; meanwhile, the silicon rubber matrix can keep the elasticity and the ductility of the organic silicon composite material, so that the organic silicon composite material has excellent flexibility, and has good mechanical properties on the basis of high radiation resistance, thereby being beneficial to the forming of the organic silicon composite material (such as protective products such as flexible pipe sleeves, plates and the like which can be stretched and bent), and the formed product has good processability and appearance performance, widening the application field and being widely applied to various environments.
Detailed Description
Reference will now be made in detail to embodiments of the invention, one or more examples of which are described below. Each example is provided by way of explanation, not limitation, of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used on another embodiment to yield a still further embodiment.
It is therefore intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present invention are disclosed in or are apparent from the following detailed description. It is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only, and is not intended as limiting the broader aspects of the present invention.
Although terms such as vulcanizing agent, filler, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention; the terms "first," "second," and the like, as used herein, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
It should be noted that the "particle size" referred to herein does not mean "particle diameter". The term "Fisher size" as used herein refers to the particle size of the powder, and the basic method of testing is the steady flow air permeation method, i.e., the specific surface area and average particle size are measured at constant air flow rate and pressure.
The large particle size and the small particle size are not particularly the particle size of the first tungsten powder and the fourth tungsten powder, but are relative concepts, namely, according to different particle sizes and the size of gaps formed among the tungsten powders, the first tungsten powder, the second tungsten powder, the third tungsten powder and the fourth tungsten powder are correspondingly filled among the gaps with different sizes, the filling modes are diversified, and the best matching effect is achieved through the matching of the tungsten powders with various specifications and sizes.
As used herein, "tap density" refers to the mass per unit volume of a powder in a container measured after tapping under specified conditions. Tap density or bulk density (loose density) is defined as the mass to volume ratio of a sample, where the sample volume includes the sample itself, the sample pores, and the sample interstitial volume.
The "shore hardness" as used herein refers to a standard of hardness of a material, and is mainly classified into three types, i.e., a type a (shore a), a type C (shore C), and a type D (shore D).
The expression "to" is used herein to indicate a range of values, and the expression of the range includes two endpoints.
It can be understood that the traditional radiation-proof material selects lead powder as the radiation-proof material, and has the defects of pollution, toxicity and the like. And the density of tungsten is 19.35g/cm 3 Is the density of lead (11.34 g/cm) 3 ) 170.6% of the total weight of the composite material, and has more excellent radiation protection and shielding properties. The radiation protection shielding performance of the tungsten-containing composite material is higher than that of the lead-containing composite material under the same addition (namely loading), and the tungsten metal does not harm human bodies or the environment in long-term use. Moreover, the metal tungsten has good ray shielding performance and does not generate secondary electron radiation. Therefore, the invention provides the organic silicon composite material containing tungsten powder, which does not contain lead powder, not only improves the radiation protection shielding property of the organic silicon composite material, but also has the advantages of no biotoxicity, no pollution to the environment, no toxicity, environmental protection and the like.
In addition, according to the invention, through research, tungsten is a high-melting-point refractory metal, the toughness and plasticity of the tungsten in a sintering state are poor, the forming and processing are difficult, and meanwhile, the tungsten powder also has the defects of rough surface, low apparent density and the like, the traditional method of directly adding tungsten powder with a single specification granularity or adding tungsten powder with a general large-range granularity can cause the small loading capacity and poor compactness of the tungsten powder on a silicon rubber substrate, so that the radiation-proof performance of the prepared organic silicon composite material is poor, for example, if the granularity of the tungsten powder is too small, the specific surface area of the tungsten powder is large, the tungsten powder is easy to agglomerate to cause the difficulty in dispersion, the processing performance is poor, the loading capacity of the tungsten powder is small, and the radiation-proof performance of the organic silicon composite material is poor and uneven; if the particle size of the tungsten powder is too large, the mechanical properties (e.g., stretchability, flexibility, etc.) of the silicone composite material may be deteriorated, limiting its practical use. And gaps can exist among the tungsten powder with larger granularity, so that the compactness of the organic silicon composite material is lower, and the radiation resistance of the organic silicon composite material is reduced. Increasing the proportion of tungsten powder in the silicone rubber matrix can also affect the processability (such as low stretch bending and flexibility) and moldability (such as powder falling, material failure to be molded, slag formation, etc.) of the prepared silicone composite material, thereby limiting the practical application of the silicone composite material.
The radiation-proof particles adopted by the invention are not single specification or general tungsten powder with large-range granularity, but tungsten powder with various specific specification sizes and tap densities is adopted and compounded according to a certain proportion (the first tungsten powder, the second tungsten powder and the third tungsten powder). Silicon rubber is used as a base material, a network structure can be formed around the radiation-proof particles, the radiation-proof particles are dispersed and filled in the silicon rubber base, and tungsten powder with small particle size can be fully filled in gaps formed among tungsten powder with large particle size, so that gaps among tungsten powder with large particle size can be avoided, the density of the radiation-proof particles can be effectively improved through the cooperation effect among tungsten powder with different particle size, and the prepared organic silicon composite material has high radiation-proof performance and good mechanical performance on the basis of adding a small amount of radiation-proof particles.
And gaps formed by the tungsten powder with large particle size can be filled with the tungsten powder with small particle size, but the tungsten powder with small particle size can cause the separation of the tungsten powder with large particle size, so that the porosity of the radiation-proof particles is too large. Through specific selection of tap densities of the first tungsten powder, the second tungsten powder and the third tungsten powder, the first tungsten powder, the second tungsten powder and the third tungsten powder can be mixed more uniformly, the porosity of the radiation-proof particles is minimized, and therefore the radiation-proof effect of the organic silicon composite material is further improved, and meanwhile, the reduction of the mechanical property of the organic silicon composite material is avoided.
In conclusion, the organic silicon composite material has the advantages of no toxicity and environmental protection. Moreover, on the basis of adding less tungsten powder, the composite material has high radiation resistance; meanwhile, the silicon rubber matrix can keep the elasticity and the ductility of the organic silicon composite material, so that the organic silicon composite material has excellent flexibility, and has good mechanical properties on the basis of high radiation resistance, thereby being beneficial to the forming of the organic silicon composite material (such as protective products such as flexible pipe sleeves, plates and the like which can be stretched and bent), and the formed product has good processability and appearance performance, widening the application field and being widely applied to various environments.
The invention provides an organic silicon composite material, which comprises the following components in parts by weight:
100 parts of silicon rubber, 500-1800 parts of radiation-proof particles, 1-5 parts of filler and an auxiliary agent; wherein, every 100 parts of radiation-proof particles comprise 70-80 parts of first tungsten powder, 10-15 parts of second tungsten powder and 5-10 parts of third tungsten powder, the Fisher particle size of the first tungsten powder is 15-20 mu m, and the tap density is more than or equal to 12.5g/cm 3 The Fisher-Tropsch particle size of the second tungsten powder is 5-10 mu m, and the tap density is more than or equal to 10.5g/cm 3 The Fisher size of the third tungsten powder is 2-3 mu m, and the tap density is more than or equal to 9.5g/cm 3 。
It should be noted that the above-mentioned organic silicon composite material does not include lead element, that is, silicone rubber, radiation-proof particles, filler, processing oil and assistant do not include lead powder or lead element.
In some embodiments, the tap density of the first tungsten powder may also be 12.5g/cm 3 、13.1g/cm 3 、13.5g/cm 3 The tap density of the second tungsten powder may be 10.5g/cm 3 、11.0g/cm 3 、11.4g/cm 3 The tap density of the third tungsten powder may be 9.5g/cm 3 、10.0g/cm 3 。
In some embodiments, the radiation-proof particles can also comprise 1-5 parts of fourth tungsten powder per 100 parts of radiation-proof particles, wherein the Freund's particle size of the fourth tungsten powder is 0.1-1 μm, and the tap density is more than or equal to 7.5g/cm 3 . The density of the radiation-proof particles can be further increased by adding the fourth tungsten powder, so that the radiation-proof particles have higher radiation-proof shielding property, strength and toughness.
It is understood that the tap density of the fourth tungsten powder may also be 7.5g/cm 3 、7.9g/cm 3 。
In some embodiments, the choice of silicone rubber is not limited, and silicone rubber commonly used in the art can be selected. Preferably, the hardness of the silicone rubber is Shore A30-Shore A65.
Further, the silicone rubber is selected from one or more of methyl vinyl mixed silica gel and phenyl mixed silica gel. The methyl vinyl mixed silica gel can be Eucalyptus globulus TN7XO, and the phenyl mixed silica gel can be JY-771/30U.
In some embodiments, the filler may be any filler known in the art, including, but not limited to, boron compounds and/or white carbon. The boron compound may be one or more selected from hexagonal boron nitride, cubic boron nitride, and boron carbide.
In some embodiments, the kind and the addition amount of the auxiliary are not limited, and for example, the auxiliary can be related auxiliary agents commonly used in the art to improve the moldability, the flowability, the radiation shielding property, the mechanical property and the like of the silicone composite, and the addition amount of the auxiliary agents in the silicone composite can be 2.65 to 21.5 parts by weight. In the present invention, the auxiliary may specifically include one or more of a vulcanizing agent, an internal mold release agent, a coupling agent, and a processing oil. Preferably, the auxiliaries include vulcanizing agents, internal mold release agents, coupling agents and processing oils.
It is understood that the kinds and addition amounts of the vulcanizing agent, the internal mold release agent, the coupling agent and the processing oil are not limited. For example, in the silicone composite material, the vulcanizing agent may be 0.5 to 1.5 parts by weight, the internal mold release agent may be 0.05 to 5 parts by weight, the coupling agent may be 2 to 10 parts by weight, and the processing oil may be 0.1 to 5 parts by weight.
The vulcanizing agent includes, but is not limited to, one or more of a double 2,4 vulcanizing agent, a double 2,5 vulcanizing agent and a platinum vulcanizing agent, and obviously, other vulcanizing agents recognized in the field can be used;
the internal release agent comprises one or more of but not limited to an internal release agent FC-606, an internal release agent BL, an internal release agent TMV and an internal release agent WS280P, and obviously, other internal release agents recognized in the field can be used;
the coupling agent can be a silane coupling agent, and specifically can be one or more selected from a silane coupling agent Si-69, a silane coupling agent KH-560, a silane coupling agent KH-570, a silane coupling agent KH-590, a silane coupling agent KH-172, a silane coupling agent KBM-403, a silane coupling agent A-171 and a silane coupling agent A-172, and also can be other silane coupling agents recognized in the field.
The processing oil can be silicone oil; the silicone oil may be one or more selected from the group consisting of dimethylhydroxysilicone oil, dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane, and obviously, may be other processing oils recognized in the art.
Preferably, the processing oil is a dimethylhydroxysilicone oil.
The second object of the present invention is to provide a method for preparing the above-mentioned organosilicon composite material, which comprises steps S100 to S300:
step S100: weighing and mixing the first tungsten powder, the second tungsten powder and the third tungsten powder according to the weight parts to prepare radiation-proof particles; it is understood that in some embodiments, step S100 may be omitted.
In some embodiments, the method and time for mixing the first tungsten powder, the second tungsten powder and the third tungsten powder are not limited, and the first tungsten powder, the second tungsten powder and the third tungsten powder can be uniformly mixed, for example, a V-type powder mixer can be selected for mixing, and the mixing time can be 6 hours to 10 hours.
Step S200: and weighing the silicon rubber, the radiation-proof particles, the filler and the auxiliary agent according to the weight parts, mixing and banburying.
In some embodiments, the mixing parameters are not limited, and the mixing parameters of silicone rubber commonly used in the art can be selected, for example, the mixing temperature can be 30 ℃ to 60 ℃.
In some embodiments, the specific process flow of the banburying may be a banburying process of silicone rubber known in the art, and may specifically be as follows:
firstly, silicon rubber is internally mixed for 3-5 min, then internal release agent is added for internal mixing for 5-10 min, then radiation-proof particles and filler are added for internal mixing for 5-10 min, then processing oil and coupling agent are added for internal mixing for 5-10 min, first mixed rubber is prepared, cooling is carried out, the first mixed rubber is internally mixed for 3-10 min, then vulcanizing agent is added for internal mixing for 5-10 min, and second mixed rubber is prepared. It can be understood that after the radiation-proof particles and the filler are added for banburying, the filler in the banburying device can be removed according to actual conditions.
Step S300: and vulcanizing the second rubber compound.
In some embodiments, the specific process flow of vulcanization may be a vulcanization process of silicone composite materials known in the art, and in the present invention, the vulcanization process may specifically be as follows:
the second rubber compound is vulcanized for 10min to 30min at the temperature of 150 ℃ to 180 ℃ and then vulcanized for 2h to 16h at the temperature of 180 ℃ to 210 ℃.
The invention further provides a radiation-proof shielding material which is prepared from the organic silicon composite material.
The invention also provides a radiation-proof product which comprises the radiation-proof shielding material.
In some embodiments, the radiation protection product may be military equipment, aerospace equipment, microelectronic equipment, and in particular, may be a cell phone, a computer, a television, a protective garment, a protective mask, a protective door, a radiation protection layer of a nuclear reactor device, a protective shield, or the like.
The present invention will be described in further detail with reference to specific examples and comparative examples.
Example 1
1) Weighing 70 parts of first tungsten powder, 15 parts of second tungsten powder, 10 parts of third tungsten powder and 5 parts of fourth tungsten powder, and mixing for 8 hours in a V-shaped powder mixer to obtain first mixed tungsten powder which is uniformly mixed; wherein the Fisher size of the first tungsten powder is 15 μm, and the tap density is 13.13g/cm 3 The second tungsten powder had a Fisher-size of 9 μm and a tap density of 11.46g/cm 3 The Freund's particle size of the third tungsten powder is 2 μm, and the tap density is 9.57g/cm 3 The fourth tungsten powder has a Fisher size of 1 μm and a tap density of 7.95g/cm 3 ；
2) Weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of first mixed tungsten powder prepared in the step 1) and 5 parts of hexagonal boron nitride, continuously internally mixing for 10min, then adding 5 parts of dimethyl hydroxyl silicone oil and 10 parts of silane coupling agent Si-69, continuously internally mixing for 10min, taking out, and placing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 2.
Example 2
1) Weighing 80 parts by weight of first tungsten powder, 10 parts by weight of second tungsten powder and 10 parts by weight of third tungsten powder, and mixing for 8 hours in a V-shaped powder mixer to obtain second mixed tungsten powder which is uniformly mixed; wherein the first tungsten powder has a Fisher-size of 18 μm and a tap density of 13.42g/cm 3 The second tungsten powder has a Fisher-size of 5 μm and a tap density of 10.57g/cm 3 The Freund's particle size of the third tungsten powder is 2 μm, and the tap density is 9.57g/cm 3 ；
2) Weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of second mixed tungsten powder prepared in the step 1) and 5 parts of hexagonal boron nitride, continuously internally mixing for 10min, then adding 5 parts of dimethyl hydroxyl silicone oil and 10 parts of silane coupling agent Si-69, continuously internally mixing for 10min, taking out, and placing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mould for vulcanization, wherein the vulcanization process parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 2.
Example 3
1) Weighing 70 parts of first tungsten powder, 15 parts of second tungsten powder, 10 parts of third tungsten powder and 5 parts of fourth tungsten powder, and mixing for 8 hours in a V-shaped powder mixer to obtain third mixed tungsten powder which is uniformly mixed; wherein the first tungsten powder has a Fisher-size particle size of 15 μm and a tap density of 13.13g/cm 3 The second tungsten powder has a Fisher-size of 5 μm and a tap density of 10.57g/cm 3 The Freund's particle size of the third tungsten powder is 3 μm, and the tap density is 10.3g/cm 3 The fourth tungsten powder has a Fisher size of 0.2 μm and a tap density of 7.57g/cm 3 ；
2) Weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of third mixed tungsten powder prepared in the step 1) and 5 parts of hexagonal boron nitride, continuously internally mixing for 10min, then adding 5 parts of dimethyl hydroxyl silicone oil and 10 parts of silane coupling agent Si-69, continuously internally mixing for 10min, taking out, and placing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 2.
Example 4
1) Weighing 80 parts by weight of first tungsten powder, 10 parts by weight of second tungsten powder and 10 parts by weight of third tungsten powder, and mixing for 8 hours in a V-shaped powder mixer to obtain fourth mixed tungsten powder which is uniformly mixed; wherein the first tungsten powder has a Fisher-size of 18 μm and a tap density of 13.42g/cm 3 The Fisher size of the second tungsten powder is 9 μm, and the tap density is 11.46g/cm 3 The Freund's particle size of the third tungsten powder is 3 μm, and the tap density is 10.3g/cm 3 ；
2) Weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of first mixed tungsten powder prepared in the step 1) and 5 parts of hexagonal boron nitride, continuously internally mixing for 10min, then adding 5 parts of dimethyl hydroxyl silicone oil and 10 parts of silane coupling agent Si-69, continuously internally mixing for 10min, taking out, and placing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 2.
Example 5
1) Weighing 70 parts of first tungsten powder, 15 parts of second tungsten powder, 10 parts of third tungsten powder and 5 parts of fourth tungsten powder, and mixing for 8 hours in a V-shaped powder mixer to obtain first mixed tungsten powder which is uniformly mixed; wherein the first tungsten powder has a Fisher-size particle size of 15 μm and a tap density of 13.13g/cm 3 The second tungsten powder had a Fisher-size of 9 μm and a tap density of 11.46g/cm 3 The Freund's particle size of the third tungsten powder is 2 μm, and the tap density is 9.57g/cm 3 The fourth tungsten powder has a Fisher size of 1 μm and a tap density of 7.95g/cm 3 ；
2) Weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 0.05 part of internal release agent FC-606, continuously internally mixing for 5min, adding 500 parts of first mixed tungsten powder prepared in the step 1) and 5 parts of hexagonal boron nitride, continuously internally mixing for 10min, then adding 5 parts of dimethyl hydroxyl silicone oil and 2 parts of silane coupling agent Si-69, continuously internally mixing for 10min, taking out, and placing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at the temperature of 30 ℃ for internal mixing for 5min, adding 0.5 part of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and placing for more than 4h at normal temperature to prepare rubber compound;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 2.
Comparative example 1
This comparative example was prepared substantially the same as example 1, except that: the tungsten powder is selected from the powder with the Fisher size of 2 μm and the tap density of 5.5g/cm 3 The tungsten powder comprises the following specific steps:
weighing 100 parts by weight of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of tungsten powder (Fisher particle size is 2 mu m, tap density is 5.5 g/cm) 3 ) And 5 parts of hexagonal boron nitride, continuously banburying for 10min, then adding 5 parts of dimethylhydroxysilicon oil and 10 parts of silane coupling agent Si-69, continuously banburying for 10min, taking out, and standing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The relevant properties of the silicone composite were tested as shown in table 3.
Comparative example 2
This comparative example was prepared substantially identically to example 1, except that: the tungsten powder is selected from the powder with the Fisher size of 5 mu m and the tap density of 7.0g/cm 3 The tungsten powder comprises the following specific steps:
weighing 100 parts of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of tungsten powder (Fisher particle size is 5 mu m, tap density is 7.0 g/cm) 3 ) And 5 parts of hexagonal boron nitride, continuously banburying for 10min, then adding 5 parts of dimethylhydroxysiloxane oil and 10 parts of silane coupling agent Si-69, continuously banburying for 10minAnd taking out and standing at normal temperature for more than 4 hours. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The silicone composite was tested for relevant properties as shown in table 3.
Comparative example 3
This comparative example was prepared substantially the same as example 1, except that: the tungsten powder is selected from 10 μm Fisher-Tropsch particle size and 7.0g/cm tap density 3 The tungsten powder comprises the following specific steps:
weighing 100 parts of phenyl mixing silica gel JY-771/30U with Shore hardness of 30A, placing the phenyl mixing silica gel JY-771/30U into an internal mixer, internally mixing for 5min at 30 ℃, adding 5 parts of internal release agent FC-606, continuously internally mixing for 5min, adding 1300 parts of tungsten powder (Fisher particle size is 10 mu m, tap density is 7.0 g/cm) 3 ) And 5 parts of hexagonal boron nitride, continuously banburying for 10min, then adding 5 parts of dimethylhydroxysilicon oil and 10 parts of silane coupling agent Si-69, continuously banburying for 10min, taking out, and standing at normal temperature for more than 4 h. Then placing the mixture into an internal mixer at 30 ℃ for internal mixing for 5min, adding 1.5 parts of a double 2,5 vulcanizing agent, carrying out internal mixing for 5min, taking out, and standing at normal temperature for more than 4h to obtain internal mixing rubber;
3) Placing the banburying rubber prepared in the step 2) into a vulcanization mold for vulcanization, wherein the vulcanization technological parameters are as follows: the primary vulcanization temperature is 170 ℃, the time is 20min, the secondary vulcanization temperature is 200 ℃, the time is 4h, and the organosilicon composite material is prepared after cooling. The silicone composite was tested for relevant properties as shown in table 3.
The formulations of the above examples and comparative examples are shown in table 1:
TABLE 1
And (3) performance testing:
1) The tensile strength and elongation at break test is in reference to standard GB/T528-2009;
2) The density test is referred to the standard GB/T533-2008;
3) Lead equivalent test is referred to standard YY0292.1-1997.
The performance test results of the silicone composite materials prepared in the above examples are shown in table 2:
TABLE 2
The performance test results of the silicone composite materials prepared according to the above respective proportions are shown in table 3:
TABLE 3
The test results in tables 2 and 3 show that the organic silicon composite material provided by the invention has the advantages of no toxicity, high radiation shielding performance, good mechanical properties (high tensile strength and high elongation at break), and contribution to the application expansion of the formed product in various application places. The tungsten powder has good machinability, the tungsten powder and silicon rubber matrix material have good fusibility, and the formed finished product (such as sample plate sample strips in radiation shielding tests and tensile tests) has smooth surface, does not have the phenomena of surface powder falling, slag crushing after being stressed and the like, and has good performance.
Compared with example 1, the silicone composite material prepared in comparative example 1 has inferior tensile properties and radiation shielding properties, and has low density. And the processability is poor, and the tungsten powder and the silicon rubber matrix material have poor fusion property, so that the banburying is difficult. In addition, the surface of the tungsten powder is easy to fall off, so that the tungsten powder is lost, and the radiation shielding performance is easy to deteriorate; the radiation shielding performance of the silicone composite material prepared in comparative example 2 is reduced; and the tensile property is also deteriorated, so that the rear-end application of the organic silicon composite material is limited; the radiation shielding performance of the organosilicon composite material prepared in the comparative example 3 is reduced, the tensile property is obviously reduced, the surface of the finished product is rough and not smooth, and the rear-end application of the organosilicon composite material is also limited.
It will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or solution of the present invention may be improved in one or more respects, but does not necessarily solve all technical problems identified in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. The organic silicon composite material is characterized by comprising the following components in parts by weight:
100 parts of silicon rubber, 500-1800 parts of radiation-proof particles, 1-5 parts of filler and an auxiliary agent; wherein, every 100 parts of the radiation-proof particles comprise 70-80 parts of first tungsten powder, 10-15 parts of second tungsten powder and 5-10 parts of third tungsten powder, and the Fisher particle size of the first tungsten powder is 15 mu m-20 μm, tap density not less than 12.5g/cm 3 The Fisher-Tropsch particle size of the second tungsten powder is 5-10 mu m, and the tap density is more than or equal to 10.5g/cm 3 The Fisher-Tropsch particle size of the third tungsten powder is 2-3 mu m, and the tap density is more than or equal to 9.5g/cm 3 。
2. The organic silicon composite material as claimed in claim 1, wherein each 100 parts of the radiation-proof particles further comprise 1-5 parts of fourth tungsten powder, the Freund's particle size of the fourth tungsten powder is 0.1-1 μm, and the tap density is not less than 7.5g/cm 3 。
3. The silicone composite of claim 1, wherein the filler is a boron compound and/or white carbon;
optionally, the boron compound comprises one or more of hexagonal boron nitride, cubic boron nitride, and boron carbide.
4. The silicone composite according to any one of claims 1 to 3, characterized in that the hardness of the silicone rubber is Shore A30 to Shore A65.
5. The silicone composite according to any one of claims 1 to 3, characterized in that the auxiliaries comprise one or more of a vulcanizing agent, an internal mold release agent, a coupling agent and a processing oil;
optionally, in the organic silicon composite material, the vulcanizing agent is 0.5 to 1.5 parts by weight, the internal mold release agent is 0.05 to 5 parts by weight, the coupling agent is 2 to 10 parts by weight, and the processing oil is 0.1 to 5 parts by weight.
6. The silicone composite of claim 5, in which the curative comprises one or more of a bis 2,4 curative, a bis 2,5 curative, and a platinum curative.
7. The silicone composite of claim 5, wherein the internal release agent comprises one or more of an internal release agent FC-606, an internal release agent BL, an internal release agent TMV, and an internal release agent WS 280P.
8. The silicone composite according to claim 5, wherein the coupling agent comprises one or more of silane coupling agent Si-69, silane coupling agent KH-560, silane coupling agent KH-570, silane coupling agent KH-590, silane coupling agent KH-172, silane coupling agent KBM-403, silane coupling agent A-171, and silane coupling agent A-172.
9. The silicone composite of claim 5, wherein the processing oil is a silicone oil;
optionally, the silicone oil comprises one or more of dimethylhydroxysilicone oil, dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.
10. A method for preparing the silicone composite material according to any one of claims 1 to 9, characterized by comprising the steps of:
and weighing the silicon rubber, the radiation-proof particles, the filler and the auxiliary agent according to the weight parts, mixing, banburying and vulcanizing.
11. The method for preparing the silicone composite material according to claim 10, characterized in that the banburying temperature is 30 ℃ to 60 ℃.
12. The method for preparing a silicone composite material according to claim 10 or 11, characterized in that the vulcanization parameters are specified as follows:
first vulcanizing at 150-180 deg.c for 10-30 min and then vulcanizing at 180-210 deg.c for 2-16 hr.
13. A radiation-proof shielding material characterized by being produced from the silicone composite material according to any one of claims 1 to 9.
14. A radiation protective product comprising the radiation protective shielding material of claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024572.4A CN115181428A (en) | 2022-08-25 | 2022-08-25 | Organic silicon composite material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024572.4A CN115181428A (en) | 2022-08-25 | 2022-08-25 | Organic silicon composite material and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115181428A true CN115181428A (en) | 2022-10-14 |
Family
ID=83523278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211024572.4A Withdrawn CN115181428A (en) | 2022-08-25 | 2022-08-25 | Organic silicon composite material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115181428A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5887042A (en) * | 1996-07-25 | 1999-03-23 | Kabushiki Kaisha Kobe Seiko Sho | Cask for a radioactive material and radiation shield |
| EP0937744A1 (en) * | 1998-02-18 | 1999-08-25 | Nippon Oil Co. Ltd. | Silicone rubber composite |
| CN104558703A (en) * | 2014-11-27 | 2015-04-29 | 厦门虹鹭钨钼工业有限公司 | Tungsten-base composite material applied to ray shielding and preparation method thereof |
| CN110718314A (en) * | 2014-04-02 | 2020-01-21 | 美国陶瓷技术公司 | Radiation attenuating compositions and methods of making the same |
| CN114921097A (en) * | 2022-05-06 | 2022-08-19 | 厦门虹鹭钨钼工业有限公司 | Nontoxic radiation-proof organic silicon composite material and preparation method thereof |
-
2022
- 2022-08-25 CN CN202211024572.4A patent/CN115181428A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5887042A (en) * | 1996-07-25 | 1999-03-23 | Kabushiki Kaisha Kobe Seiko Sho | Cask for a radioactive material and radiation shield |
| EP0937744A1 (en) * | 1998-02-18 | 1999-08-25 | Nippon Oil Co. Ltd. | Silicone rubber composite |
| CN110718314A (en) * | 2014-04-02 | 2020-01-21 | 美国陶瓷技术公司 | Radiation attenuating compositions and methods of making the same |
| CN104558703A (en) * | 2014-11-27 | 2015-04-29 | 厦门虹鹭钨钼工业有限公司 | Tungsten-base composite material applied to ray shielding and preparation method thereof |
| CN114921097A (en) * | 2022-05-06 | 2022-08-19 | 厦门虹鹭钨钼工业有限公司 | Nontoxic radiation-proof organic silicon composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李善荣;陆恒玉;陶刚;俸洪舜;孙乐华;: "核辐射防护材料的研究进展" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tang et al. | Phosphorus-containing silane modified steel slag waste to reduce fire hazards of rigid polyurethane foams | |
| CN109735112A (en) | Additional organosilicon thermally conductive gel and preparation method thereof | |
| Chai et al. | Preparation and properties of novel, flexible, lead‐free X‐ray‐shielding materials containing tungsten and bismuth (III) oxide | |
| CN102977613B (en) | Method for preparing halogen-free and flame-retardant silicon rubber | |
| CN103709763A (en) | Low-compression permanent deformation silicone rubber composition and preparation method thereof | |
| CN101775219A (en) | Radiation-resistant addition type room temperature vulcanized liquid silicone rubber and preparation method thereof | |
| CN112830720B (en) | Radiation pollution preventing mortar for wall | |
| CN109777114A (en) | A kind of thermal conductive silicon rubber silicon rubber and preparation method thereof | |
| CN101717583B (en) | Addition type heat vulcanized silicone rubber with radiation resistance and preparation method thereof | |
| CN107556753A (en) | A kind of micropore silicon rubber composite material of high temperature resistant environment-protective and preparation method thereof | |
| CN102585515A (en) | Refractory silicon rubber | |
| CN102532917A (en) | High-temperature resisting liquid silicon rubber and preparation method thereof | |
| CN102268582B (en) | There is the alumina-base material of ray and neutron comprehensive shielding effect | |
| CN108314841A (en) | A kind of antibacterial abrasion resistant fire blocking plastics and preparation method thereof | |
| CN108130039A (en) | A kind of low-gravity low viscosity heat conduction casting glue and preparation method thereof | |
| CN101768362A (en) | Condensed room temperature vulcanized silicone rubber with radiation-resistant property and preparation method thereof | |
| CN115232408B (en) | A radiation-resistant EPDM rubber composite material and preparation method thereof | |
| CN115181428A (en) | Organic silicon composite material and preparation method and application thereof | |
| CN109192348A (en) | One kind can pour type silicon rubber base heatproof shielding material and preparation method thereof | |
| CN111925763B (en) | Anti-cracking epoxy pouring sealant with improved heat-conducting property | |
| CN115746796A (en) | Preparation method of flexible flame-retardant shape-stabilized phase-change material | |
| CN114921097A (en) | Nontoxic radiation-proof organic silicon composite material and preparation method thereof | |
| CN110408218A (en) | A kind of high temperature resistant silicone rubber and preparation method thereof | |
| CN108912691A (en) | A kind of low loading halogen-free anti-flaming silicon rubber and preparation method thereof | |
| Zhang et al. | Enhanced thermal and mechanical properties of flame-retardant expandable graphite modified silk fibroin-based rigid polyurethane foam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221014 |
|
| WW01 | Invention patent application withdrawn after publication |