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

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

Example Embodiment

[0030] Example one

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

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

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

[0034] 3) After extracting the obtained aramid fiber with a mixed so...

Example Embodiment

[0037] Example two

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

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

[0040] 3) Under the protection of nitrogen, place 1g of surface-treated aramid fiber in a three-necked flask, add 13.5ml of PBS buffer solution, and add 50ml of a mixed solvent of N,N-dimethylformamide and water (N , The volume ratio of N-dimethylformamide to water is 2.6:1, and the solubility parameter of the mixed solvent is 15.3 cal 1 / 2 ·Cm -3 / 2 ), 6mg of biological enzyme, 85ml of glycidyl methacrylate, dropwise add 2ml of 14% hydrogen peroxide, react at 41℃ for 7 hours, and take out the aramid fiber.

[004...

Example Embodiment

[0042] Example three

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

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

[0045] 3) Under the protection of nitrogen, place 1g of surface-treated aramid fiber in a three-necked flask, add 30ml of PBS buffer solution, and add 45ml of a mixed solvent composed of toluene, 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, dropwise adding 5ml of mass concentration of 6% hydrogen peroxide, react at 35°C for 5 hours, and take out the aramid ...

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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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