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Aramid fiber coated with inorganic nanoparticles on surface and preparation method thereof

A technology of inorganic nanoparticles and aramid fibers, applied in the directions of inorganic chemistry, fiber type, fiber treatment, etc., can solve the problems of low activity and poor UV resistance of aramid fibers, and achieve simple operation, wide UV absorption range, long-term good usability

Inactive Publication Date: 2014-02-12
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of poor UV resistance and low activity of aramid fiber in the prior art, the purpose of the present invention is to provide a fiber that not only has excellent heat resistance and mechanical properties of the original aramid fiber, but also has excellent UV resistance, Surface active modified aramid fiber and its preparation method

Method used

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  • Aramid fiber coated with inorganic nanoparticles on surface and preparation method thereof
  • Aramid fiber coated with inorganic nanoparticles on surface and preparation method thereof
  • Aramid fiber coated with inorganic nanoparticles on surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of Aramid Fibers Covered with Inorganic Nanoparticles

[0028] (1) 0.5g para-aramid fiber (Kevlar-49, diameter 12um, density 1.43g / cm 3 , produced by DuPont, USA) were immersed in acetone, petroleum ether, and deionized water, respectively, and refluxed for 3 hours each; after cleaning, the fibers were taken out and dried at 80°C for 12 hours to obtain clean aramid fibers, which were denoted as KF.

[0029] (2) Stir and dissolve 10.5g of sodium hydroxide in 120mL of ethanol to obtain an ethanol solution of sodium hydroxide; immerse 0.1g of the KF fiber obtained in step (1) into the ethanol solution of sodium hydroxide, and reflux for 5 hours; After the reaction is finished, the fibers are washed with water and dried to obtain fibers with amino groups on the surface.

[0030] (3) Under the protection of nitrogen atmosphere, take 0.1g of aramid fibers with amino groups obtained in step (2), add 30mL of γ-glycidyl etheroxypropyltrimethoxysilane, and 150mL o...

Embodiment 2

[0038] 1. Preparation of Aramid Fibers Covered with Inorganic Nanoparticles

[0039] (1) 0.5g para-aramid fiber (Kevlar-49, diameter 12um, density 1.43g / cm 3 , produced by DuPont, USA) were immersed in acetone, petroleum ether, and deionized water, respectively, and refluxed for 3 hours each; after cleaning, the fibers were taken out and dried at 80°C for 12 hours to obtain clean aramid fibers, which were denoted as KF.

[0040] (2) Stir and dissolve 14.6g of sodium hydroxide in 120mL of ethanol to obtain an ethanol solution of sodium hydroxide; immerse 0.1g of the KF fiber obtained in step (1) into the ethanol solution of sodium hydroxide, and reflux for 3 hours; After the reaction is finished, the fibers are washed with water and dried to obtain fibers with amino groups on the surface.

[0041] (3) Under the protection of nitrogen atmosphere, take 0.1g of aramid fibers with amino groups obtained in step (2), add 20mL of γ-glycidyl etheroxypropyltrimethoxysilane, and 180mL o...

Embodiment 3

[0048] 1. Preparation of Aramid Fibers Covered with Inorganic Nanoparticles

[0049] (1) 0.5g para-aramid fiber (Kevlar-49, diameter 12um, density 1.43g / cm 3 , produced by DuPont, USA) were immersed in acetone, petroleum ether, and deionized water, respectively, and refluxed for 3 hours each; after cleaning, the fibers were taken out and dried at 80°C for 12 hours to obtain clean aramid fibers, which were denoted as KF.

[0050] (2) Stir and dissolve 14.7g of potassium hydroxide in 110mL of ethanol to obtain an ethanol solution of potassium hydroxide; immerse 0.1g of the KF fiber obtained in step (1) into the ethanol solution of potassium hydroxide, and reflux for 5 hours; After the reaction is finished, the fibers are washed with water and dried to obtain fibers with amino groups on the surface.

[0051] (3) Under the protection of nitrogen atmosphere, take 0.1g of aramid fibers with amino groups obtained in step (2), add 30mL of γ-glycidyl etheroxypropyl trimethoxysilane, a...

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Abstract

The invention relates to aramid fiber coated with inorganic nanoparticles on the surface and a preparation method thereof. The preparation method comprises the following steps: functionalizing the surface of the aramid fiber to enable the surface of the fiber to contain methoxy groups; hydroxylating calcium-oxide-doped cerium oxide and reacting the cerium oxide with the fiber to obtain the aramid fiber coated with the inorganic nanoparticles on the surface. According to the invention, the hydroxylated calcium-oxide-doped cerium oxide is an inorganic particle with the photocatalytic activity much lower than that of ultraviolet absorbents such as TiO2 and zinc oxide; the inorganic particles can absorb ultraviolet rays to protect the fiber from damage caused by the ultraviolet rays, and the damage caused by a photocatalytic action of the inorganic particles to the fiber during ultraviolet radiation can be avoided, so that the hydroxylated calcium-oxide-doped cerium oxide is a safe, effective and long-lasting ultraviolet absorber. The surface of the modified aramid fiber is provided with a large number of reactive groups, so that adhesion of the modified aramid fiber to a lot of substrates can be improved, and thus the application field of the fiber is widened; the nanoparticles with high heat resistance are coated on the surface of the fiber, so that the thermal property of the fiber can be effectively improved.

Description

technical field [0001] The invention relates to a modification technology of organic fibers, in particular to an aramid fiber whose surface is coated with inorganic nanoparticles and a preparation method thereof. Background technique [0002] In the history of chemical fiber development in the world, the invention of aramid (PPTA) fiber is another milestone invention after nylon. Aramid fiber with low density (1.43-1.44g / cm 3 ), high strength (3.6 GPa), good toughness and high temperature resistance (500°C), it is not only widely used as tire cord, cut-resistant gloves, electronic appliances, sports equipment and other civilian products, but also in aerospace, bulletproof And other military fields also played an important role, known as "armored guards". [0003] However, there are two major characteristics of aramid fiber, one is the surface inert, lack of active groups, low surface free energy (39.8 mJ / m 2 ), poor adhesion and wettability with the resin, resulting in lo...

Claims

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Application Information

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IPC IPC(8): D06M11/45D06M11/11D06M11/70D06M11/64D06M13/513D06M11/38D06M23/08C01F17/00D06M101/36
Inventor 梁国正朱小玲顾嫒娟袁莉
Owner SUZHOU UNIV
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