CN112679690B - Energy-absorbing material and preparation method thereof - Google Patents
Energy-absorbing material and preparation method thereof Download PDFInfo
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- CN112679690B CN112679690B CN202011567012.4A CN202011567012A CN112679690B CN 112679690 B CN112679690 B CN 112679690B CN 202011567012 A CN202011567012 A CN 202011567012A CN 112679690 B CN112679690 B CN 112679690B
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- 239000011358 absorbing material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920002635 polyurethane Polymers 0.000 claims abstract description 60
- 239000004814 polyurethane Substances 0.000 claims abstract description 60
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000004327 boric acid Substances 0.000 claims abstract description 55
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 45
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 41
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 32
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 29
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000178 monomer Substances 0.000 claims abstract description 27
- 229910000077 silane Inorganic materials 0.000 claims abstract description 27
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 42
- 229920002545 silicone oil Polymers 0.000 claims description 14
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 9
- 239000012948 isocyanate Substances 0.000 claims description 9
- 150000002513 isocyanates Chemical class 0.000 claims description 9
- 229920000570 polyether Polymers 0.000 claims description 9
- 229920005862 polyol Polymers 0.000 claims description 9
- 150000003077 polyols Chemical class 0.000 claims description 9
- 229920005906 polyester polyol Polymers 0.000 claims description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 19
- 239000002904 solvent Substances 0.000 abstract description 14
- 238000011084 recovery Methods 0.000 abstract description 6
- 239000000376 reactant Substances 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract description 4
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 32
- 239000000463 material Substances 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 150000002009 diols Chemical class 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004970 Chain extender Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229940028001 boric acid antiseptic and disinfectant Drugs 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Polyurethanes Or Polyureas (AREA)
Abstract
The application relates to the technical field of high polymer materials, and provides an energy-absorbing material and a preparation method thereof. The preparation method provided by the application comprises the following steps: reacting boric acid and a silane monomer containing hydroxyl in dihydric alcohol to obtain a first solution containing polyborosiloxane; adding the first solution into a polyurethane synthesis system and carrying out reaction. The application synthesizes the low-viscosity polyborosiloxane by using the dihydric alcohol in the reaction of synthesizing the polyborosiloxane by using boric acid and silane monomers, and improves the solubility of the polyborosiloxane in a synthesis system of polyurethane. Meanwhile, the dihydric alcohol can also be used as a reactant for synthesizing polyurethane, so that a reaction product, namely the first solution for synthesizing the polyborosiloxane can be directly added into a polyurethane synthesis system, the process of solvent recovery treatment after the synthesis of the polyborosiloxane in the prior art is saved, the production cost is favorably reduced, and the method is suitable for large-scale industrial production of energy-absorbing materials.
Description
Technical Field
The application belongs to the technical field of high polymer materials, and particularly relates to an energy absorbing material and a preparation method thereof.
Background
Because of excellent impact resistance and buffering performance, the energy-absorbing material is more and more favored by markets of sports protection, shoe material shock absorption, military and police protection, industrial protection and the like, wherein the popular energy-absorbing material is a polyurethane elastomer containing an expansion body, foamed polyurethane is used as a matrix, polyborosiloxane is used as the expansion body, and the energy-absorbing material has excellent impact resistance, energy-absorbing and buffering effects and flexibility. However, since the viscosity of the polyborosiloxane is relatively high, the polyborosiloxane has poor solubility when being directly added into a polyurethane synthesis system, so that in the process of adding the polyborosiloxane into the polyurethane synthesis system, high-speed shearing or a mode of externally adding a solvent to disperse the polyborosiloxane is often needed to realize effective compounding with the polyurethane, the structure and the performance of a final product are difficult to control, and the mode of externally adding the solvent to disperse the polyborosiloxane also involves solvent recovery treatment and has a complex process.
Disclosure of Invention
The application aims to provide a preparation method of an energy-absorbing material and the energy-absorbing material prepared by the preparation method, and aims to solve the problem that polyborosiloxane is directly added into a polyurethane synthetic system and has poor solubility so as to improve the quality of the synthetic energy-absorbing material.
The technical scheme adopted by the application is as follows:
a preparation method of an energy absorbing material comprises the following steps:
reacting boric acid with a silane monomer containing hydroxyl in dihydric alcohol to obtain a first solution containing polyborosiloxane;
and adding the first solution into a polyurethane synthesis system and carrying out reaction.
According to the preparation method of the energy-absorbing material, the dihydric alcohol is used in the reaction of synthesizing the polyborosiloxane from the boric acid and the silane monomer, on one hand, the dihydric alcohol can be used as a good solvent for dissolving the powdery boric acid, so that the boric acid and the silane monomer are promoted to be fully and uniformly mixed, and the synthesis of the polyborosiloxane is promoted; on the other hand, the dihydric alcohol contains an active site capable of reacting with boric acid, so that the boric acid can react with the dihydric alcohol to a certain extent in the reaction process of synthesizing the polyborosiloxane, thereby reducing the crosslinking degree of the synthesized polyborosiloxane, reducing the non-bond complexing effect formed by oxygen atoms and lone pair electrons on boron atoms in the polyborosiloxane, reducing the viscosity of the polyborosiloxane, further improving the solubility of the polyborosiloxane which is directly added into a polyurethane synthesis system in the follow-up process, needing no additional solvent to disperse the polyborosiloxane, and simplifying the steps. In addition, the dihydric alcohol can also be used as a reactant for synthesizing polyurethane, and after the polyborosiloxane is synthesized, the first solution containing the polyborosiloxane is directly added into a polyurethane synthesis system for reaction, so that the dihydric alcohol directly participates in the polyurethane synthesis reaction, a solvent recovery treatment process and a high-speed shearing process required by the prior art are avoided, the process is simple and controllable, the production cost is favorably reduced, and the process is suitable for large-scale industrial production of energy-absorbing materials.
Correspondingly, the energy absorbing material is prepared by the preparation method.
The energy-absorbing material is prepared by the preparation method, and has excellent energy-absorbing and shock-absorbing effects.
Detailed Description
In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The terms "first", "second", "third" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third" may explicitly or implicitly include one or more such features.
A preparation method of an energy absorbing material comprises the following steps:
s01, reacting boric acid with a silane monomer containing hydroxyl in dihydric alcohol to obtain a first solution containing polyborosiloxane;
and S02, adding the first solution into a polyurethane synthesis system and carrying out reaction.
Specifically, in step S01, boric acid is reacted with a hydroxyl group-containing silane monomer in a diol to synthesize a polyborosiloxane, thereby obtaining a first solution containing the polyborosiloxane.
Boric acid and silane monomers are used as main raw materials for synthesizing the polyborosiloxane, the silane monomer contains hydroxyl, and small molecules (such as H) are removed through esterification between the hydroxyl provided by the boric acid and the hydroxyl provided by the silane monomer2O, etc.) to form a polyborosiloxane. In some embodiments, the volume ratio of boric acid to hydroxyl silicone oil is (0.2-500) to (1-50), thus ensuring the synthesis of polyborosiloxane.
Boric acid is in powder form and its molecular formula can be represented as B (OH)3. The boric acid may be selected from commercially available products, or boric acid products prepared by means of conventional techniques in the art, and is not particularly limited in the examples of the present application.
The choice of silane monomer affects the efficiency of the polyborosiloxane synthesis, and in some embodiments, the silane monomer is a hydroxy silicone oil. In a further embodiment, the hydroxy silicone oil has a hydroxyl content of 1% to 10%. Hydroxyl is the main reactive site of the hydroxyl silicone oil, and the hydroxyl content of the hydroxyl silicone oil is adjusted to be within the range so as to control the polyborosiloxane synthesized subsequently to have proper viscosity and crosslinking degree, thereby improving the dispersion performance of the polyborosiloxane in a polyurethane synthesis system.
The dihydric alcohol contains an active site capable of reacting with boric acid, so that the boric acid can react with the dihydric alcohol to a certain extent in the reaction process of synthesizing the polyborosiloxane, thereby reducing the crosslinking degree of the synthesized polyborosiloxane, reducing the non-bond complexing effect formed by oxygen atoms and lone pair electrons on boron atoms in the polyborosiloxane, reducing the viscosity of the polyborosiloxane, further improving the solubility of the polyborosiloxane which is directly added into a polyurethane synthesis system in the follow-up process, needing no additional solvent to disperse the polyborosiloxane, and simplifying the steps.
The dihydric alcohol is used as a solvent for synthesizing the polyborosiloxane and also used as one of reactants to participate in the synthesis of the polyborosiloxane. In the embodiment of the application, the dihydric alcohol is used in the reaction of synthesizing the polyborosiloxane from the boric acid and the silane monomer, on one hand, the dihydric alcohol can be used as a good solvent for dissolving the powdery boric acid, so that the boric acid and the silane monomer are fully and uniformly mixed, and the synthesis of the polyborosiloxane is promoted; on the other hand, the dihydric alcohol contains an active site capable of reacting with boric acid, so that the boric acid can react with the dihydric alcohol to a certain extent in the reaction process of synthesizing the polyborosiloxane, thereby reducing the crosslinking degree of the synthesized polyborosiloxane, reducing the viscosity of the polyborosiloxane, and further improving the solubility of the polyborosiloxane which is directly added into a polyurethane synthesis system in the follow-up process; in another aspect, the diol can also be used as a reactant for synthesizing polyurethane, and after the polyborosiloxane is synthesized, the first solution containing the polyborosiloxane can be directly added into a polyurethane synthesis system for reaction, so that the diol directly participates in the polyurethane synthesis reaction, a solvent recovery treatment process and a high-speed shearing process required by the prior art are avoided, the process is simple and controllable, the production cost is reduced, and the process is suitable for large-scale industrial production of energy-absorbing materials.
The dihydric alcohol is an alcohol having two or more hydroxyl groups in the molecule, and in some embodiments, the dihydric alcohol includes at least one of ethylene glycol, propylene glycol, and polyethylene glycol.
In some embodiments, the step of reacting the boric acid with the hydroxyl-containing silane monomer in a glycol comprises:
s011, dissolving boric acid in dihydric alcohol to obtain a boric acid solution;
s012, dispersing silane monomers in boric acid solution, and reacting to synthesize polyborosiloxane.
Boric acid is dissolved in dihydric alcohol, and then silane monomer is added, so that the boric acid and the silane monomer are favorably and uniformly mixed, and the synthesis of polyborosiloxane is promoted.
In step S011, the specific operation of dissolving boric acid in glycol can be performed by referring to the conventional techniques in the art, such as adding boric acid dissolved in glycol by mechanical stirring and/or ultrasound.
In some embodiments, the volume ratio of boric acid or the borate to glycol is 1 (1-8).
In some embodiments, the step of dissolving boric acid in the glycol comprises: boric acid is added to the glycol and heated at 40 c to 80 c for 10 to 60 minutes, thus accelerating the dissolution of boric acid in the glycol.
In the step of reacting boric acid with a hydroxyl-containing silane monomer in a diol, the reaction conditions directly affect the properties of the synthesized polyborosiloxane. In some embodiments, the step of reacting boric acid with the hydroxyl-containing silane monomer in a glycol comprises, based on the silane monomer being a hydroxyl silicone oil: reacting boric acid with hydroxyl silicone oil at 100-140 ℃ until the reaction product begins to wrap the shaft.
In the present specification, "wrapping" is a phenomenon that characterizes the elasticity of a high molecular polymer, and the reason for the wrapping phenomenon is that the high molecular liquid is an elastic liquid, and when the high molecular liquid rotates, a macromolecular chain with elasticity is oriented along the circumferential direction and is subjected to tensile deformation, so that pressure towards the axis is generated, and the liquid is forced to climb along a rod. In the examples of the present application, the reaction product initially includes an axis indicating that the reaction synthesized polyborosiloxane, which was included in the reaction product.
In step S02, the first solution is added to a polyurethane synthesis system to react so as to synthesize polyurethane and uniformly disperse the polyborosiloxane in the polyurethane.
The first mixed solution is a reaction product of the polyborosiloxane synthesized in the synthesis step S01, contains dihydric alcohol which does not participate in the polyborosiloxane synthesis reaction, the dihydric alcohol can participate in the synthesis reaction of the polyurethane, so that the first solution is added into the synthesis system of the polyurethane for reaction, the subsequent synthesis of the polyurethane cannot be affected, the process of solvent recovery treatment after the synthesis of the polyborosiloxane in the prior art can be saved, and can promote the polyborosiloxane to be mixed with the synthetic polyurethane immediately, so that the polyborosiloxane fully penetrates through the synthetic polyurethane, the polyborosiloxane is promoted to be highly dispersed in the polyurethane matrix, the prepared energy-absorbing material has excellent dispersion performance, and is beneficial to improving the energy-absorbing and shock-absorbing effects of the material, so that a high-quality energy-absorbing material product is obtained.
In the examples of the present application, the synthesis system of polyurethane is a raw material system or a reaction system for synthesizing polyurethane, and for example, the synthesis system may be a raw material mixture system before the reaction or a reaction system after the start of the reaction.
The method for adding the first solution into the polyurethane synthesis system and carrying out the reaction can be adjusted according to the actual production conditions and the performance of the energy-absorbing material to be prepared.
In some embodiments, the step of adding the first solution to a polyurethane synthesis system and reacting comprises:
a1, providing a first component comprising polyether polyol and/or polyester polyol, and mixing the first component with the first solution to obtain a second solution;
a2, providing a second component comprising isocyanate, mixing the second component with the second solution and carrying out a reaction.
Wherein, in the step a1, the first component and the first solution are mixed at 120 ℃ to accelerate the uniform dispersion of the first component in the first solution and to facilitate the increase of the subsequent reaction speed.
In step a2, the volume ratio of the second solution to the second component is preferably 100 (50-100) to provide enough raw materials for polyurethane synthesis and improve the reaction efficiency.
In some embodiments, the step of adding the first solution to a polyurethane synthesis system and reacting comprises:
b1, providing a first component comprising polyether polyol and/or polyester polyol and a second component comprising isocyanate, and mixing and reacting the first component and the second component to obtain polyurethane prepolymer;
b2, mixing the first solution and the polyurethane prepolymer and reacting.
The raw materials in the synthesis system mainly comprise polyether polyol or polyester polyol and isocyanate, and the specific composition can be referred to the conventional technology in the field, for example, the raw materials for synthesizing polyurethane can also comprise a catalyst, a chain extender and the like. In the actual reaction process, the catalyst, the chain extender and the like can partially or completely form a mixture with polyether polyol or polyester polyol to synthesize polyurethane, and the adjustment can be specifically carried out according to the actual reaction conditions. In some embodiments, the polyether polyol or polyester polyol is mixed with water, a catalyst and a chain extender to form a first component and the isocyanate is a second component. The catalyst includes amine catalyst, delayed catalyst, etc.
In the embodiment of the present application, the polyether polyol and the polyester polyol may be selected from conventional materials used in the art for synthesizing polyurethane, and similarly, the isocyanate may also be selected from conventional materials used in the art for synthesizing polyurethane, and the specific material type may be adjusted according to the properties of the synthesized energy absorbing material.
In some embodiments, the isocyanate is selected from diphenylmethane diisocyanate and/or toluene diisocyanate.
In the step of adding the first solution to a polyurethane synthesis system and carrying out reaction, the weight ratio of the polyborosiloxane to the synthesized polyurethane is 1 (1-9).
In summary, the preparation method provided by the embodiment of the present application synthesizes the energy absorbing material with excellent performance by adjusting the synthetic route of the polyborosiloxane and optimizing the process of each step and the type, temperature, time and proportion of the materials involved in each step.
Different from the prior art that solvents such as isopropanol or hydroxyl silicone oil are adopted to disperse polyborosiloxane to prepare shear thickening liquid and then the shear thickening liquid is added into a polyurethane synthesis system, the diol is used in the reaction of synthesizing polyborosiloxane by boric acid and silane monomers in the embodiment of the application, the polyborosiloxane with low viscosity is synthesized, the solubility of the polyborosiloxane added into the polyurethane synthesis system in the follow-up process is improved, and the steps are simplified. Meanwhile, the dihydric alcohol can also be used as a reactant for synthesizing polyurethane, so that a reaction product, namely the first solution for synthesizing the polyborosiloxane can be directly added into a polyurethane synthesis system, the process of solvent recovery treatment after the synthesis of the polyborosiloxane in the prior art is saved, the production cost is favorably reduced, and the method is suitable for large-scale industrial production of energy-absorbing materials.
Based on the technical scheme, the embodiment of the energy-absorbing material is also provided, and the energy-absorbing material is prepared by the preparation method.
The energy absorption material is a polyurethane composite material and is formed by compounding polyurethane and polyborosiloxane, the polyborosiloxane has the shear thickening characteristic, and the polyborosiloxane is compounded with the polyurethane, so that the dynamic mechanical property of the polyurethane can be obviously improved, the composite material can obtain better elasticity and has better deformation energy consumption capability when stressed, and the buffering energy absorption effect is enhanced.
In addition, the energy-absorbing material has a bicontinuous structure, polyurethane is used as a matrix, polyborosiloxane is used as an expansion body, the polyborosiloxane penetrates through the polyurethane matrix and forms a continuous network structure with the polyurethane, and the specific structure can refer to the polyurethane elastomer containing the expansion body in the prior art.
According to the embodiment of the application, the preparation method of the energy-absorbing material is adjusted, so that the energy-absorbing material has excellent dispersing performance, and the energy-absorbing material is endowed with excellent energy-absorbing and shock-absorbing effects.
In some embodiments, the weight ratio of polyborosiloxane to polyurethane matrix is 1 (1-9).
The practice of the present invention is illustrated by the following examples.
Example 1
The embodiment provides an energy absorbing material, and a preparation method of the energy absorbing material comprises the following steps:
(1) according to the volume ratio of boric acid to ethylene glycol of 1: 8, adding boric acid into ethylene glycol, and heating at 60 ℃ for 30min to obtain a clear and transparent boric acid solution;
mixing the boric acid solution and the hydroxyl silicone oil according to the volume ratio of the hydroxyl silicone oil to the boric acid solution in the step (1) of 100:6.3, and then reacting at 130 ℃ until the reaction product has a shaft wrapping phenomenon, so as to obtain a first solution dispersed with polyborosiloxane;
(2) mixing the first solution prepared in step (1) with a first component comprising polyurethane polyether polyol at 120 ℃ to obtain a homogeneous second solution;
and blending the second solution and a second component containing diphenylmethane diisocyanate according to the volume ratio of the second solution to the second component of 100:80, and forming a final product.
Example 2
This example differs from example 1 in that: replacing the ethylene glycol in the step (1) with polyethylene glycol.
Example 3
This example differs from example 1 in that: the volume ratio of the boric acid to the ethylene glycol in the step (1) is 1: 4.
The energy absorbing materials prepared in examples 1-3 were fabricated into articles 9mm and 14mm thick with a density of 0.4g/cm3Left and right, then the test was performed according to the method of BS EN 1621-1. It was found that the articles corresponding to examples 1-3 having a thickness of 9mm passed the primary test standard of BS EN1621-1 and the articles corresponding to examples 1-3 having a thickness of 14mm passed the secondary test standard of BS EN 1621-1.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. The preparation method of the energy-absorbing material is characterized by comprising the following steps of:
reacting boric acid with a silane monomer containing hydroxyl in dihydric alcohol to obtain a first solution containing polyborosiloxane; wherein the silane monomer is hydroxyl silicone oil, and the hydroxyl content of the hydroxyl silicone oil is 1-10%; the volume ratio of the boric acid to the hydroxyl silicone oil is (0.2-500) to (1-50);
and adding the first solution into a polyurethane synthesis system and carrying out reaction.
2. The method of claim 1, wherein reacting the boric acid with the hydroxyl-containing silane monomer in a glycol comprises:
dissolving the boric acid in the dihydric alcohol to obtain a boric acid solution;
dispersing the silane monomer in the boric acid solution, and reacting to synthesize the polyborosiloxane.
3. The method of claim 2, wherein the step of dissolving the boric acid in the glycol comprises: adding the boric acid into the dihydric alcohol, and heating for 10-60 minutes at 40-80 ℃.
4. The method of claim 1, wherein reacting the boric acid with the hydroxyl-containing silane monomer in a glycol comprises: and reacting the boric acid with the hydroxyl silicone oil at 100-140 ℃ until the reaction product begins to wrap the shaft.
5. The method of claim 1, wherein the glycol comprises at least one of ethylene glycol, propylene glycol, and polyethylene glycol; and/or
The volume ratio of the boric acid to the dihydric alcohol is 1 (1-8).
6. The method according to any one of claims 1 to 5, wherein in the step of adding the first solution to a synthesis system of polyurethane and carrying out the reaction, the weight ratio of the polyborosiloxane to the synthesized polyurethane is 1 (1-9).
7. The method according to any one of claims 1 to 5, wherein the step of adding the first solution to a polyurethane synthesis system and carrying out a reaction comprises:
a1, providing a first component comprising polyether polyol and/or polyester polyol, and mixing the first component with the first solution to obtain a second solution;
a2, providing a second component comprising isocyanate, mixing the second component with the second solution and carrying out reaction;
or, the step of adding the first solution into a polyurethane synthesis system and carrying out reaction comprises the following steps:
b1, providing a first component comprising polyether polyol and/or polyester polyol and a second component comprising isocyanate, and mixing and reacting the first component and the second component to obtain polyurethane prepolymer;
b2, mixing the first solution and the polyurethane prepolymer and reacting.
8. The method of claim 7, wherein the isocyanate is selected from the group consisting of diphenylmethane diisocyanate and toluene diisocyanate.
9. An energy absorbing material, characterized by being produced by the production method of any one of claims 1 to 8.
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| CN113480844A (en) * | 2021-06-02 | 2021-10-08 | 山东威雅苏扬防护科技有限公司 | Preparation method of carbon nanotube reinforced polyurethane impact-resistant material |
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| CN108341974A (en) * | 2017-01-25 | 2018-07-31 | 翁秋梅 | A kind of dynamic aggregation object and its application with hybrid cross-linked structure |
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| CN110564164B (en) * | 2019-09-27 | 2021-05-28 | 中国科学院长春应用化学研究所 | A kind of waterproof polyborosiloxane shock-resistant damping material and preparation method thereof |
| CN111187516B (en) * | 2019-12-11 | 2022-03-04 | 西安理工大学 | Polyvinyl alcohol modified polyborosiloxane composite material and preparation method thereof |
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