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Polymer-coated aramid fiber and preparation method thereof

An aramid fiber and surface coating technology, which is applied to the aramid fiber coated with polymer on the surface and the field of preparation thereof, can solve the problem of not taking into account the special properties of the material itself, and achieve good swelling effect, simple and easy process, The effect of mild reaction conditions

Inactive Publication Date: 2012-02-15
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, the existing surface coating methods cannot take into account the improvement of the special properties of the material and the protection of its own performance from damage

Method used

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  • Polymer-coated aramid fiber and preparation method thereof
  • Polymer-coated aramid fiber and preparation method thereof
  • Polymer-coated aramid fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The aramid fibers are placed in acetone that can remove surface attachments, and left to stand for 4 hours to remove dirt on the fiber surface, then washed with water for 3 hours, and vacuum-dried to obtain surface-treated aramid fibers.

[0032] 1) Take a total of 0.68g of potassium dihydrogen phosphate and sodium chloride, 20.5ml of 0.1mol / L sodium hydroxide, dilute with water to 100ml, and prepare a buffer solution PBS with a pH value of 6.8.

[0033] 2) Under nitrogen protection, place 1g of surface-treated aramid fibers in a three-necked flask, add 9.4ml of PBS buffer solution, 35ml of acetone and water mixed solvent (the volume ratio of acetone and water is 11:9, The solubility parameter of this mixed solvent is 15.9 cal 1 / 2 cm -3 / 2 ), add 1 mg of biological enzyme and 10 ml of glycidyl methacrylate, dropwise add 0.7 ml of hydrogen peroxide with a mass concentration of 11%, and react at 32°C for 7 hours.

[0034] 3) After extracting the obtained aramid fiber wit...

Embodiment 2

[0038] 1) Place the aramid fiber in acetone that can remove surface dirt, let it stand for 7 hours to remove the dirt on the fiber surface, then wash it with water for 6 hours, and finally dry it in vacuum to obtain surface-treated aramid fiber, spare.

[0039] 2) Take 1.20g of sodium dihydrogen phosphate and sodium chloride in total, 13.2ml of 0.1mol / L potassium hydroxide, dilute to 100ml with water, prepare a buffer solution with a pH value of 6.5, and set aside.

[0040] 3) Under nitrogen protection, place 1g of surface-treated aramid fibers in a three-necked flask, add 13.5ml of PBS buffer solution, add 50ml of N, N-dimethylformamide and water The mixed solvent (N , the volume ratio of N-dimethylformamide to water is 2.6:1, and the solubility parameter of this mixed solvent is 15.3 cal 1 / 2 cm -3 / 2 ), 6mg of biological enzyme, 85ml of glycidyl methacrylate, 2ml of hydrogen peroxide with a mass concentration of 14% was added dropwise, reacted at 41°C for 7 hours, and the a...

Embodiment 3

[0043] 1) Place the aramid fiber in acetone that can remove surface dirt, let it stand for 8 hours to remove the dirt on the fiber surface, then wash with water for 2 hours, and finally dry it in vacuum to obtain surface-treated aramid fiber, spare.

[0044] 2) Take 1.36g of potassium dihydrogen phosphate and 79ml of 0.1mol / L sodium hydroxide, dilute with water to 200ml, prepare a buffer solution with a pH value of 7.4, and set aside.

[0045] 3) Under nitrogen protection, place 1g of surface-treated aramid fibers in a three-necked flask, add 30ml of PBS buffer solution, add 45ml of toluene, a mixed solvent of cyclohexanone and water (toluene, cyclohexanone and The volume ratio of water is 1:2:2, and the solubility parameter of the mixed solvent is 15.0 cal 1 / 2 cm -3 / 2 ), 4mg of biological enzyme, 65ml of hydroxypropyl methacrylate, 5ml of hydrogen peroxide with a mass concentration of 6% was added dropwise, reacted at 35°C for 5 hours, and the aramid fiber was taken out.

...

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Abstract

The invention discloses a polymer-coated aramid fiber and a preparation method thereof. The preparation method comprises the following steps: 1, mixing an inorganic salt with an inorganic alkali solution, and diluting with water to prepare a buffer solution; 2, placing an aramid fiber in the buffer solution under the protect of nitrogen, adding a solvent, horseradish peroxidase and an acrylic acid monomer, adding hydrogen peroxide drop by drop, and carrying out washing and vacuum drying after finishing a reaction to obtain the polymer-coated aramid fiber. By adopting above technical scheme of the invention, the enzyme inactivation rate is low, and the surface of the aramid fiber has a good swelling effect in a reaction medium, so the full contact of the biological enzyme and the fiber is guaranteed, and the grafting rate is improved; and the formed coating which contains active groups allows the cohesiveness of the fiber with other materials to be effectively improved, so a large space is provided for the further modification of the fiber. The technical scheme adopted in the invention has the characteristics of low damage to the fiber, mild reaction condition, simple and easily implemented technology, environmental protection, and high benefit of the industrialization production.

Description

technical field [0001] The invention relates to a fiber surface modification technology, in particular to an aramid fiber coated with a polymer on the surface and a preparation method thereof. technical background [0002] Polyparaphenylene terephthalamide (PPTA) fiber is a high-performance aromatic polyamide fiber first developed and industrialized by DuPont Company of the United States. The product name is Kevlar, and it is named aramid fiber in my country. Aramid fiber has the characteristics of high modulus and high strength, and at the same time has many excellent properties such as high specific strength (equivalent to 5 to 6 times that of steel wire), high specific modulus, corrosion resistance and wear resistance, so it is widely used in National defense industry, construction, machinery, shipbuilding industry, automobile industry, bulletproof products and sports equipment, especially in the field of aerospace. However, due to the highly oriented crystallization of ...

Claims

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Application Information

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IPC IPC(8): D06M14/16
Inventor 顾嫒娟厉世能梁国正袁莉
Owner SUZHOU UNIV
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