CN112455041A - Multilayer composite fabric based on polysiloxane modification and preparation process thereof - Google Patents
Multilayer composite fabric based on polysiloxane modification and preparation process thereof Download PDFInfo
- Publication number
- CN112455041A CN112455041A CN202011363675.4A CN202011363675A CN112455041A CN 112455041 A CN112455041 A CN 112455041A CN 202011363675 A CN202011363675 A CN 202011363675A CN 112455041 A CN112455041 A CN 112455041A
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- CN
- China
- Prior art keywords
- polyacrylate
- fabric
- composite fabric
- solution
- multilayer composite
- 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.)
- Pending
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- 239000004744 fabric Substances 0.000 title claims abstract description 127
- 239000002131 composite material Substances 0.000 title claims abstract description 98
- -1 polysiloxane Polymers 0.000 title claims abstract description 90
- 238000012986 modification Methods 0.000 title claims abstract description 25
- 230000004048 modification Effects 0.000 title claims abstract description 25
- 229920001296 polysiloxane Polymers 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 65
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 54
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 17
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 claims abstract description 15
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001110 calcium chloride Substances 0.000 claims abstract description 11
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 61
- 238000003756 stirring Methods 0.000 claims description 25
- 238000009987 spinning Methods 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 19
- 239000004760 aramid Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 13
- 238000002791 soaking Methods 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 6
- HZVOZRGWRWCICA-UHFFFAOYSA-N methanediyl Chemical compound [CH2] HZVOZRGWRWCICA-UHFFFAOYSA-N 0.000 claims description 6
- VMAWODUEPLAHOE-UHFFFAOYSA-N 2,4,6,8-tetrakis(ethenyl)-2,4,6,8-tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Chemical compound C=C[Si]1(C)O[Si](C)(C=C)O[Si](C)(C=C)O[Si](C)(C=C)O1 VMAWODUEPLAHOE-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010041 electrostatic spinning Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 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 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000035699 permeability Effects 0.000 abstract description 7
- 229920002554 vinyl polymer Polymers 0.000 abstract description 7
- 230000002209 hydrophobic effect Effects 0.000 abstract description 6
- 238000004383 yellowing Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000006750 UV protection Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 239000000178 monomer Substances 0.000 abstract description 2
- 229960002713 calcium chloride Drugs 0.000 description 8
- 230000005670 electromagnetic radiation Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 229940050560 calcium chloride anhydrous Drugs 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/26—Polymers or copolymers of unsaturated carboxylic acids or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
- D06M2101/36—Aromatic polyamides
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Abstract
The invention discloses a multilayer composite fabric based on polysiloxane modification and a preparation process thereof. The invention takes polyacrylate as a main body to prepare the multi-layer composite fabric with the characteristics of hydrophobicity, air permeability, corrosion resistance and ultraviolet resistance. (1) The mechanical property and the wave absorption property of the modified aramid fiber are utilized to effectively enhance the mechanical property and the anti-electromagnetic radiation property of the composite fabric; (2) the interface acting force of the modified aramid fiber and the polyacrylate is increased by using calcium chloride and polymethyl vinyl siloxane, and the interlaminar shear strength and the tensile strength of the composite fabric are enhanced; (3) the hydrophobic and air permeability of the composite fabric is enhanced by the polymethyl vinyl siloxane; (4) 2-hydroxy-4-methoxybenzophenone and nano titanium dioxide are used for synergistically increasing the ultraviolet-proof function, so that the problem of yellowing caused by double bond monomers in the composite fabric is solved.
Description
Technical Field
The invention relates to the technical field of composite fabrics, in particular to a multilayer composite fabric based on polysiloxane modification and a preparation process thereof.
Background
In recent years, due to the increase of the quality of life of people, the requirements on the performance of clothes are higher and higher. By adjusting the components of the fabric, the properties of the fabric in various aspects, such as water resistance, ultraviolet resistance, etc., are rapidly increased, and therefore, research on developing fabrics or fabrics with excellent properties and a wider application range is also gradually focused.
In the prior fabrics, polyacrylate is used as an important substance in the fabric preparation process, the polyacrylate is widely used in the fabric preparation process due to the characteristic of firm bonding, but the hydrophobicity of the fabric is poor, so a polysiloxane substance is used for increasing the hydrophobicity of the fabric, but the uniformity problem exists, and the yellowing problem is caused by the existence of polyacrylate. Meanwhile, the electromagnetic shielding effect of the composite fabric cannot be increased in general design, but the function is more and more important along with the wide use of electronic products such as mobile phones and the like, in addition, the composite fabric is endowed with the electromagnetic radiation resistance, and the problem of weak interface binding force exists among substances, so that how to design and prepare the multilayer composite fabric with the electromagnetic radiation resistance, the hydrophobic water resistance, the strong air permeability and the ultraviolet ray resistance function is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a multilayer composite fabric based on polysiloxane modification and a preparation process thereof, and aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the multilayer composite fabric based on polysiloxane modification comprises a polyethylene film and a composite polyacrylate fabric.
Preferably, the raw materials of the composite polyacrylate fabric comprise, by weight, 30-45 parts of polyacrylate, 15-20 parts of polymethylvinylsiloxane, 20-40 parts of modified aramid fiber, 15-25 parts of cotton fiber, 5-15 parts of nano titanium dioxide and 2-5 parts of 2-hydroxy-4-methoxybenzophenone.
Preferably, the modified aramid fiber is obtained by modifying the surface of aramid fiber by using a calcium chloride solution.
Preferably, the length of the aramid fiber is 3-8 mm.
Preferably, the preparation process of the multilayer composite fabric based on polysiloxane modification comprises the following steps:
s1: preparing modified aramid fibers;
s2: preparing polymethylvinylsiloxane;
s3: preparing a composite polyacrylate fabric;
s4: and (3) preparing the multilayer composite fabric.
Preferably, the method comprises the following steps:
s1: preparing modified aramid fibers: completely cleaning aramid fiber, and performing surface modification in a calcium chloride absolute ethyl alcohol solution under the conditions of: soaking for 5-6 hours in water bath at 80 ℃; filtering, washing with absolute ethyl alcohol, and drying at 100-120 ℃ for 4-6 hours to obtain modified aramid fibers for later use;
s2: preparation of polymethylvinylsiloxane:
adding octamethylcyclotetrasiloxane, tetravinyl tetramethylcyclotetrasiloxane and hexamethyldisiloxane into a reaction kettle according to the ratio of 19:15:2, setting the stirring speed to be 200-300 rmp to form a mixture, heating at 70 ℃ for 10 minutes, adding 0.15 wt% of trifluoromethanesulfonic acid, continuing refluxing at 70 ℃ for 6 hours, cooling to 20 ℃ after the reaction is finished, adding sodium carbonate to stop the reaction, adjusting the pH to be 7.0, filtering, and vacuumizing to obtain polymethylvinylsiloxane for later use;
s3: preparing a composite polyacrylate fabric:
(1) stirring the weighed polyacrylate for 24 hours at 60 ℃, and dissolving the weighed polyacrylate into a DMF solution to obtain a 20 wt% polyacrylate solution for later use;
(2) adding the weighed modified aramid fiber and cotton fiber into a polymethylvinylsiloxane solution, and stirring for 12-16 hours to obtain a suspension for later use;
(3) mixing 20 wt% of polyacrylate solution with the suspension, and homogenizing at 60-70 ℃ for 6-8 hours to obtain spinning solution for later use;
(4) carrying out ultrasonic treatment on the spinning solution in an ultrasonic machine, transferring the spinning solution into an injector, setting the injector feed rate to be 1mL/h, setting the inner diameter of a needle point to be 0.37mm, the spinning temperature to be 25-27 ℃, the relative humidity to be 45-50%, the distance of a receiver to be 20 cm, and the external voltage to be 30kV, and executing electrostatic spinning; drying the fabric in a vacuum drying oven at 50-60 ℃ for 6-12 hours to obtain a fabric substrate;
(5) setting the stirring speed of a polymethylvinylsiloxane solution, 2-hydroxy-4-methoxybenzophenone and nano titanium dioxide to be 200-400 rmp, and stirring for 20 minutes to obtain a mixed solution; soaking the prepared fabric substrate into the mixed solution, soaking for 20-30 minutes, and drying at 150 ℃ for 30 minutes to obtain a composite polyacrylate fabric;
s4: preparing a multilayer composite fabric: spraying a layer of carbene glue on the composite polyacrylate fabric, spreading the prepared polyethylene film on the upper part, setting the rolling temperature at 50-80 ℃, and rolling to form the multilayer composite fabric.
Preferably, in step S1, the concentration of the calcium chloride anhydrous ethanol solution is 5-8 wt%.
Preferably, in step S3 (2), the concentration of the polymethylvinylsiloxane solution is 12-20 wt%.
Preferably, in step S3 (5), the concentration of the polymethylvinylsiloxane solution is 1-3 wt%.
In the technical scheme, a composite fabric is prepared by taking polyacrylate as a main body and matching modified aramid fiber, cotton fiber and polymethylvinylsiloxane; loading the 2-hydroxy-4-methoxybenzophenone and the nano titanium dioxide on the fabric; and (3) obtaining a composite polyacrylate fabric, and hot-rolling a layer of polypropylene film by using carbene glue to obtain the hydrophobic, breathable, corrosion-resistant and ultraviolet-proof multilayer composite fabric. The method comprises the following specific steps:
firstly, polyacrylate is a firm and elastic substance, is widely used in printing of fabrics, has good film forming property, and is generally used as a binder in the fabrics. But the application of the composite fabric is limited due to weak hydrophobicity, and the cotton fiber has hydrophilicity, so that the polymethyl vinyl siloxane is added to modify the cotton fiber, and the hydrophobicity of the composite fabric is increased; meanwhile, the modified aramid fiber is added, so that the electromagnetic radiation resistance of the composite fabric is improved.
Firstly, polysiloxane is a substance with strong waterproofness, good air permeability, good flexibility but poor mechanical property, and can form an intercrossed polymer network with polyacrylate, so that the hydrophobicity and the air permeability of the composite fabric are effectively enhanced. However, there are problems of uneven distribution and migration of the polysiloxane during the preparation process, resulting in the destruction of the hydrophobic structure, and therefore, in order to ensure the uniformity of the polysiloxane during the preparation process, polymethylvinylsiloxanes having a proper amount of double bonds in the polysiloxane skeleton and a uniform distribution have been selected. The vinyl functional groups in the molecular chain of the polymethylvinylsiloxane enable the composite fabric to have higher hydrophobicity, and the siloxane in the molecular chain is grafted to the acrylic chain, so that the composite fabric is more uniform; however, as the vinyl group increases to produce a higher degree of crosslinking with polyacrylate, the migration of the siloxane segment is limited, and the toughness is lowered, so that the amount to be added needs to be controlled.
Secondly, the aramid fiber is a substance with excellent mechanical properties such as high strength, rigidity and high fracture strain, and can effectively enhance the mechanical properties of the composite fabric and just make up for the defects in the mechanical properties of the prior composite fabric. Meanwhile, the composite fabric has a wave absorbing function, so that electromagnetic radiation can be effectively reduced, and the electromagnetic radiation preventing effect of the composite fabric is increased. However, aramid fibers are smooth in surface, high in crystallinity and poor in adhesion with most polymers, so that the aramid fibers are modified by calcium chloride and anchored in the composite fabric by polymethylvinylsiloxane. The specific principle is as follows: the calcium ions and amide groups in the aramid fibers have a coordination complexing effect, so that the acting force and the crystallinity of hydrogen bonds in the aramid fibers are reduced, and the acting force between the modified aramid fibers and the polymethylvinylsiloxane coupling agent is increased; and the hydrolyzed hydroxyl of the polymethylvinylsiloxane can perform substitution reaction with chlorine on the calcium chloride, so that the interface strength is increased.
Secondly, the polyacrylate contains double bonds such as esters and vinyl and has strong hydrophobicity, so yellowing inevitably occurs and the polyacrylate is used on the surface of fabric to influence color and beauty, therefore, 2-hydroxy-4-methoxybenzophenone and nano titanium dioxide are used for finishing the surface of the fabric through low-concentration polymethylvinylsiloxane, the anti-ultraviolet function of the composite fabric is improved, and the mechanical property of the composite fabric is reduced due to aging of the modified aramid fiber caused by ultraviolet rays is effectively inhibited. In addition, the 2-hydroxy-4-methoxybenzophenone is a light stabilizer, resists discoloration and effectively inhibits the yellowing problem of the composite fabric; the titanium dioxide also has the advantages of effectively absorbing ultraviolet rays and converting energy into heat energy and increasing the warmth retention property of the composite fabric in use.
Finally, the polyethylene film is a soft and transparent film with air permeability and corrosion resistance, and the polyethylene film is covered on the composite polyacrylate fabric, so that the corrosion resistance of the fabric can be improved.
Compared with the prior art, the invention has the following beneficial effects: (1) the mechanical property and the wave absorption property of the modified aramid fiber are utilized to effectively enhance the mechanical property and the anti-electromagnetic radiation property of the composite fabric; (2) the interface acting force of the modified aramid fiber and the polyacrylate is increased by using calcium chloride and polymethyl vinyl siloxane, and the interlaminar shear strength and the tensile strength of the composite fabric are enhanced; (3) the hydrophobic and air permeability of the composite fabric is enhanced by the polymethyl vinyl siloxane; (4) 2-hydroxy-4-methoxybenzophenone and nano titanium dioxide are used for synergistically increasing the ultraviolet-proof function, so that the problem of yellowing caused by double bond monomers in the composite fabric is solved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
s1: preparing modified aramid fibers: completely cleaning aramid fiber, and performing surface modification in a calcium chloride absolute ethyl alcohol solution under the conditions of: dipping in water bath at 80 ℃ for 5 hours; filtering, washing with absolute ethyl alcohol, and drying at 100 ℃ for 4 hours to obtain modified aramid fibers for later use;
s2: preparation of polymethylvinylsiloxane:
adding octamethylcyclotetrasiloxane, tetravinyl tetramethylcyclotetrasiloxane and hexamethyldisiloxane into a reaction kettle according to the ratio of 19:15:2, setting the stirring speed to be 200rmp, forming a mixture, heating at 70 ℃ for 10 minutes, adding 0.15 wt% of trifluoromethanesulfonic acid, continuously refluxing at 70 ℃ for 6 hours, cooling to 20 ℃ after the reaction is finished, adding sodium carbonate to stop the reaction, adjusting the pH to be 7.0, filtering, and vacuumizing to obtain polymethylvinylsiloxane for later use;
s3: preparing a composite polyacrylate fabric: (1) stirring the weighed polyacrylate for 24 hours at 60 ℃, and dissolving the weighed polyacrylate into a DMF solution to obtain a 20 wt% polyacrylate solution for later use; (2) adding the weighed modified aramid fiber and cotton fiber into a polymethylvinylsiloxane solution, and stirring for 12 hours to obtain a suspension for later use; (3) mixing 20 wt% of polyacrylate solution with the suspension, and homogenizing at 60 ℃ for 6 hours to obtain spinning solution for later use; (4) carrying out ultrasonic treatment on the spinning solution in an ultrasonic machine, transferring the spinning solution into an injector, setting the injector feed rate to be 1mL/h, setting the inner diameter of a needle point to be 0.37mm, the spinning temperature to be 25 ℃, the relative humidity to be 45 percent, the distance of a receiver to be 20 cm, and the external voltage to be 30kV, and executing electrostatic spinning; drying in a vacuum drying oven at 50 ℃ for 6 hours to obtain a fabric substrate; (5) setting the stirring speed of the polymethylvinylsiloxane solution, the 2-hydroxy-4-methoxybenzophenone and the nano titanium dioxide to be 200rmp, and stirring for 20 minutes to obtain a mixed solution; soaking the prepared fabric substrate into the mixed solution, soaking for 20 minutes, and drying at 150 ℃ for 30 minutes to obtain a composite polyacrylate fabric;
s4: preparing a multilayer composite fabric: spraying a layer of carbene glue on the composite polyacrylate fabric, spreading the prepared polyethylene film on the upper part, setting the rolling temperature at 50 ℃, and rolling to form the multilayer composite fabric.
In the embodiment, the raw materials of the composite polyacrylate fabric comprise, by weight, 30 parts of polyacrylate, 15 parts of polymethylvinylsiloxane, 20 parts of modified aramid fiber, 15 parts of cotton fiber, 5 parts of nano titanium dioxide and 2 parts of 2-hydroxy-4-methoxybenzophenone.
In step S1, the concentration of the calcium chloride anhydrous ethanol solution is 5 wt%. In step S3 (2), the concentration of the polymethylvinylsiloxane solution is 12 wt%. In step S3 (5), the concentration of the polymethylvinylsiloxane solution was 1 wt%.
Example 2:
s1: preparing modified aramid fibers: completely cleaning aramid fiber, and performing surface modification in a calcium chloride absolute ethyl alcohol solution under the conditions of: soaking in 80 deg.C water bath for 6 hr; filtering, washing with absolute ethyl alcohol, and drying at 120 ℃ for 6 hours to obtain modified aramid fibers for later use;
s2: preparation of polymethylvinylsiloxane:
adding octamethylcyclotetrasiloxane, tetravinyl tetramethylcyclotetrasiloxane and hexamethyldisiloxane into a reaction kettle according to the ratio of 19:15:2, setting the stirring speed to be 300rmp, forming a mixture, heating at 70 ℃ for 10 minutes, adding 0.15 wt% of trifluoromethanesulfonic acid, continuously refluxing at 70 ℃ for 6 hours, cooling to 20 ℃ after the reaction is finished, adding sodium carbonate to stop the reaction, adjusting the pH to be 7.0, filtering, and vacuumizing to obtain polymethylvinylsiloxane for later use;
s3: preparing a composite polyacrylate fabric: (1) stirring the weighed polyacrylate for 24 hours at 60 ℃, and dissolving the weighed polyacrylate into a DMF solution to obtain a 20 wt% polyacrylate solution for later use; (2) adding the weighed modified aramid fiber and cotton fiber into a polymethylvinylsiloxane solution, and stirring for 16 hours to obtain a suspension for later use; (3) mixing 20 wt% of polyacrylate solution with the suspension, and homogenizing at 70 ℃ for 8 hours to obtain spinning solution for later use; (4) carrying out ultrasonic treatment on the spinning solution in an ultrasonic machine, transferring the spinning solution into an injector, setting the injector feed rate to be 1mL/h, setting the inner diameter of a needle point to be 0.37mm, the spinning temperature to be 27 ℃, the relative humidity to be 50%, the distance of a receiver to be 20 cm, and the external voltage to be 30kV, and executing electrostatic spinning; drying in a vacuum drying oven at 60 ℃ for 12 hours to obtain a fabric substrate; (5) setting the stirring speed of the polymethylvinylsiloxane solution, the 2-hydroxy-4-methoxybenzophenone and the nano titanium dioxide to be 400rmp, and stirring for 20 minutes to obtain a mixed solution; soaking the prepared fabric substrate into the mixed solution, performing soaking treatment for 30 minutes, and drying at 150 ℃ for 30 minutes to obtain a composite polyacrylate fabric;
s4: preparing a multilayer composite fabric: spraying a layer of carbene glue on the composite polyacrylate fabric, spreading the prepared polyethylene film on the upper part, setting the rolling temperature at 80 ℃, and rolling to form the multilayer composite fabric.
In the embodiment, the raw materials of the composite polyacrylate fabric comprise, by weight, 45 parts of polyacrylate, 20 parts of polymethylvinylsiloxane, 40 parts of modified aramid fiber, 25 parts of cotton fiber, 15 parts of nano titanium dioxide and 5 parts of 2-hydroxy-4-methoxybenzophenone.
In step S1, the concentration of the calcium chloride anhydrous ethanol solution is 8 wt%. In step S3 (2), the concentration of the polymethylvinylsiloxane solution is 20 wt%. In step S3 (5), the concentration of the polymethylvinylsiloxane solution was 3 wt%.
Example 3:
s1: preparing modified aramid fibers: completely cleaning aramid fiber, and performing surface modification in a calcium chloride absolute ethyl alcohol solution under the conditions of: dipping in water bath at 80 ℃ for 5.5 hours; filtering, washing with absolute ethyl alcohol, and drying at 110 ℃ for 5 hours to obtain modified aramid fibers for later use;
s2: preparation of polymethylvinylsiloxane:
adding octamethylcyclotetrasiloxane, tetravinyl tetramethylcyclotetrasiloxane and hexamethyldisiloxane into a reaction kettle according to the ratio of 19:15:2, setting the stirring speed to be 250rmp, forming a mixture, heating at 70 ℃ for 10 minutes, adding 0.15 wt% of trifluoromethanesulfonic acid, continuously refluxing at 70 ℃ for 6 hours, cooling to 20 ℃ after the reaction is finished, adding sodium carbonate to stop the reaction, adjusting the pH to be 7.0, filtering, and vacuumizing to obtain polymethylvinylsiloxane for later use;
s3: preparing a composite polyacrylate fabric: (1) stirring the weighed polyacrylate for 24 hours at 60 ℃, and dissolving the weighed polyacrylate into a DMF solution to obtain a 20 wt% polyacrylate solution for later use; (2) adding the weighed modified aramid fiber and cotton fiber into a polymethylvinylsiloxane solution, and stirring for 14 hours to obtain a suspension for later use; (3) mixing 20 wt% of polyacrylate solution with the suspension, and homogenizing at 65 ℃ for 7 hours to obtain spinning solution for later use; (4) carrying out ultrasonic treatment on the spinning solution in an ultrasonic machine, transferring the spinning solution into an injector, setting the injector feed rate to be 1mL/h, setting the inner diameter of a needle point to be 0.37mm, the spinning temperature to be 26 ℃, the relative humidity to be 48 percent, the distance of a receiver to be 20 cm, and the external voltage to be 30kV, and executing electrostatic spinning; drying in a vacuum drying oven at 55 ℃ for 9 hours to obtain a fabric substrate; (5) setting the stirring speed of the polymethylvinylsiloxane solution, the 2-hydroxy-4-methoxybenzophenone and the nano titanium dioxide to be 300rmp, and stirring for 20 minutes to obtain a mixed solution; soaking the prepared fabric substrate into the mixed solution, carrying out soaking treatment for 25 minutes, and drying at 150 ℃ for 30 minutes to obtain a composite polyacrylate fabric;
s4: preparing a multilayer composite fabric: spraying a layer of carbene glue on the composite polyacrylate fabric, spreading the prepared polyethylene film on the upper part, setting the rolling temperature at 65 ℃, and rolling to form the multilayer composite fabric.
In the embodiment, the raw materials of the composite polyacrylate fabric comprise, by weight, 40 parts of polyacrylate, 18 parts of polymethylvinylsiloxane, 30 parts of modified aramid fiber, 20 parts of cotton fiber, 10 parts of nano titanium dioxide and 3 parts of 2-hydroxy-4-methoxybenzophenone.
In step S1, the concentration of the calcium chloride anhydrous ethanol solution is 6 wt%. In step S3 (2), the concentration of the polymethylvinylsiloxane solution is 16 wt%. In step S3 (5), the concentration of the polymethylvinylsiloxane solution was 2 wt%.
Example 4: only the modified aramid fiber was replaced with the aramid fiber as in example 3.
Example 5: as in example 3, only the modified aramid fiber was not added.
Example 6: only polymethylvinylsiloxane was replaced with polydimethylsiloxane as in example 3.
Example 7: as in example 3, only the polymethylvinylsiloxane was not added.
Experiment:
experiment 1: taking a polysiloxane modified multilayer composite fabric prepared in examples 1 to 7, cutting the multilayer composite fabric into rectangular strips of 10mm × 80mm, and referring to the test method in patent CN201510114478.1, under the test conditions that: the final tensile strength was measured at a constant elongation rate of 10mm/min at a humidity of 50%, a temperature of 25 ℃ and an instrument tension of 2N, and the formula is tensile strength ═ breaking strength/(rectangular width × thickness of the fabric), and the results are shown in table 1:
experiment 2: taking the multilayer composite fabric based on polysiloxane modification prepared in examples 1-7, and testing the radiation resistance of the multilayer composite fabric by using an electromagnetic radiation detector at 0.5 GHz;
experiment 3: taking the multilayer composite fabric based on polysiloxane modification prepared in examples 1 to 7, cutting the multilayer composite fabric into rectangular strips of 2mm × 2mm, and measuring the ultraviolet transmittance at 10 to 400nm by using an ultraviolet transmittance tester, wherein the obtained results are shown in table 1:
experiment 4: taking the multilayer composite fabric based on polysiloxane modification prepared in examples 1-7, cutting the multilayer composite fabric into rectangular strips of 5mm × 5mm, fixing the strips on a glass slide, and testing the contact angle of the fabric by using a static contact angle method, wherein the obtained results are shown in table 1:
TABLE 1
The data of the examples 1 to 3 show that the contact angle is greater than 110, the electromagnetic shielding property reaches 21dB, and the ultraviolet transmittance is less than 12%, which indicates that the prepared multilayer composite fabric has excellent tensile strength, hydrophobicity, electromagnetic radiation resistance and ultraviolet resistance.
The data of comparative example 4 show that the tensile strength is reduced, which indicates that the unmodified aramid fiber has weak interfacial force and the tensile strength of the composite fabric is reduced, which can also be reflected from the appearance that the toughness of the composite fabric is insufficient and gaps exist. Compared with the example 5, the tensile strength and the electromagnetic shielding property are greatly reduced, which shows that the mechanical property and the electromagnetic radiation resistance of the composite fabric are effectively enhanced by utilizing the mechanical property and the wave absorption property of the modified aramid fiber.
The data of comparative example 6 shows that the hydrophobic property is slightly reduced, because the introduction of vinyl in polymethylvinylsiloxane improves the hydrophobicity and the water resistance of the composite fabric. Further comparison of the contact angle data in example 7 shows a large drop in contact angle and no hydrophobicity. From the tensile strength data, there is a large drop in example 7 because the conventional silicone polymethylvinylsiloxane increases the interfacial strength of the modified aramid fiber and the polyacrylate, a little bit higher than example 5 because the calcium chloride reduces the crystallinity of the aramid fiber, allowing an interfacial force between the modified aramid fiber and the polyacrylate.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A multilayer composite fabric based on polysiloxane modification is characterized in that: the multilayer composite fabric comprises a polyethylene film and a composite polyacrylate fabric.
2. The multilayer composite fabric based on polysiloxane modification according to claim 1, wherein: the raw materials of the composite polyacrylate fabric comprise, by weight, 30-45 parts of polyacrylate, 15-20 parts of polymethylvinylsiloxane, 20-40 parts of modified aramid fiber, 15-25 parts of cotton fiber, 5-15 parts of nano titanium dioxide and 2-5 parts of 2-hydroxy-4-methoxybenzophenone.
3. The multilayer composite fabric based on polysiloxane modification as claimed in claim 2, characterized in that: the modified aramid fiber is obtained by modifying the surface of aramid fiber through a calcium chloride solution.
4. The multilayer composite fabric based on polysiloxane modification as claimed in claim 3, characterized in that: the length of the aramid fiber is 3-8 mm.
5. A preparation process of multilayer composite fabric based on polysiloxane modification is characterized by comprising the following steps: the method comprises the following steps:
s1: preparing modified aramid fibers;
s2: preparing polymethylvinylsiloxane;
s3: preparing a composite polyacrylate fabric;
s4: and (3) preparing the multilayer composite fabric.
6. The process for preparing multilayer composite fabric based on polysiloxane modification according to claim 5, wherein the process comprises the following steps: the method comprises the following steps:
s1: preparing modified aramid fibers: completely cleaning aramid fiber, and performing surface modification in a calcium chloride absolute ethyl alcohol solution under the conditions of: soaking for 5-6 hours in water bath at 80 ℃; filtering, washing with absolute ethyl alcohol, and drying at 100-120 ℃ for 4-6 hours to obtain modified aramid fibers for later use;
s2: preparation of polymethylvinylsiloxane:
adding octamethylcyclotetrasiloxane, tetravinyl tetramethylcyclotetrasiloxane and hexamethyldisiloxane into a reaction kettle according to the ratio of 19:15:2, setting the stirring speed to be 200-300 rmp to form a mixture, heating at 70 ℃ for 10 minutes, adding 0.15 wt% of trifluoromethanesulfonic acid, continuing refluxing at 70 ℃ for 6 hours, cooling to 20 ℃ after the reaction is finished, adding sodium carbonate to stop the reaction, adjusting the pH to be 7.0, filtering, and vacuumizing to obtain polymethylvinylsiloxane for later use;
s3: preparing a composite polyacrylate fabric:
(1) stirring the weighed polyacrylate for 24 hours at 60 ℃, and dissolving the weighed polyacrylate into a DMF solution to obtain a 20 wt% polyacrylate solution for later use;
(2) adding the weighed modified aramid fiber and cotton fiber into a polymethylvinylsiloxane solution, and stirring for 12-16 hours to obtain a suspension for later use;
(3) mixing 20 wt% of polyacrylate solution with the suspension, and homogenizing at 60-70 ℃ for 6-8 hours to obtain spinning solution for later use;
(4) carrying out ultrasonic treatment on the spinning solution in an ultrasonic machine, transferring the spinning solution into an injector, setting the injector feed rate to be 1mL/h, setting the inner diameter of a needle point to be 0.37mm, the spinning temperature to be 25-27 ℃, the relative humidity to be 45-50%, the distance of a receiver to be 20 cm, and the external voltage to be 30kV, and executing electrostatic spinning; drying the fabric in a vacuum drying oven at 50-60 ℃ for 6-12 hours to obtain a fabric substrate;
(5) setting the stirring speed of a polymethylvinylsiloxane solution, 2-hydroxy-4-methoxybenzophenone and nano titanium dioxide to be 200-400 rmp, and stirring for 20 minutes to obtain a mixed solution; soaking the prepared fabric substrate into the mixed solution, soaking for 20-30 minutes, and drying at 150 ℃ for 30 minutes to obtain a composite polyacrylate fabric;
s4: preparing a multilayer composite fabric: spraying a layer of carbene glue on the composite polyacrylate fabric, spreading the prepared polyethylene film on the upper part, setting the rolling temperature at 50-80 ℃, and rolling to form the multilayer composite fabric.
7. The process for preparing multilayer composite fabric based on polysiloxane modification according to claim 6, wherein the process comprises the following steps: in step S1, the concentration of the calcium chloride absolute ethyl alcohol solution is 5-8 wt%.
8. The process for preparing multilayer composite fabric based on polysiloxane modification according to claim 6, wherein the process comprises the following steps: in the step (2) of the step S3, the concentration of the polymethylvinylsiloxane solution is 12-20 wt%.
9. The process for preparing multilayer composite fabric based on polysiloxane modification according to claim 6, wherein the process comprises the following steps: in step S3 (5), the concentration of the polymethylvinylsiloxane solution is 1-3 wt%.
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| CN119189454A (en) * | 2024-11-27 | 2024-12-27 | 南通华锦成化纤科技有限公司 | A high-strength fiber textile composite material and preparation method thereof |
| CN119531138A (en) * | 2025-01-23 | 2025-02-28 | 紫罗兰家纺科技股份有限公司 | A blended material for home textiles that is easy to clean, production process and application thereof |
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Application publication date: 20210309 |