Preparation method of nanometer zinc oxide modified aramid fiber

A nano-zinc oxide and modified aramid fiber technology, applied in the field of aramid fiber, can solve the problems that have not been seen before, and achieve the effects of improved interfacial shear strength, improved bonding fastness and simple preparation process

Inactive Publication Date: 2019-06-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding how to improve the bonding fastness of nano-zinc oxide and aramid fiber, no relevant research has been seen so far

Method used

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  • Preparation method of nanometer zinc oxide modified aramid fiber
  • Preparation method of nanometer zinc oxide modified aramid fiber
  • Preparation method of nanometer zinc oxide modified aramid fiber

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] This embodiment provides a method for preparing nano-zinc oxide modified aramid fibers, and the specific preparation steps are as follows:

[0035] Step 1: Functional treatment of aramid fiber:

[0036] a. Preparation of hydrolyzed aramid fibers: firstly, aramid fibers (heterocyclic aramid F-368, Zhonglan Chenguang Chemical Research Institute) were wound on a polytetrafluoroethylene square frame, and then immersed in a concentration of 10wt% sodium hydroxide In the solution, treat it at a temperature of 30°C and a stirring speed of 100r / min for 10 minutes, rinse it with deionized water three times; immerse the fiber treated with sodium hydroxide in 10% hydrochloric acid for 30s, and rinse it with deionized water 3 times, followed by vacuum drying in an oven at 120°C for 1 hour to obtain hydrolyzed aramid fiber;

[0037] b. Functional treatment of aramid fibers: Put the above-mentioned hydrolyzed aramid fibers into a mixture of thionyl chloride and N,N-dimethylformamide...

Embodiment 2

[0053] This embodiment provides a method for preparing nano-zinc oxide modified aramid fibers, and the specific preparation steps are as follows:

[0054] Step 1: Functional treatment of aramid fiber:

[0055] a. Preparation of hydrolyzed aramid fiber: firstly wind the aramid fiber (heterocyclic aramid F-368, Zhonglan Chenguang Chemical Research Institute) on a polytetrafluoroethylene square frame, and then immerse it in a concentration of 20wt% sodium hydroxide In the solution, treat it at a temperature of 40°C and a stirring speed of 150r / min for 20 minutes, rinse it with deionized water three times; immerse the fiber treated with sodium hydroxide in 20% hydrochloric acid for 40s, and rinse it with deionized water 3 times, followed by vacuum drying in an oven at 120°C for 1 hour to obtain hydrolyzed aramid fibers;

[0056] b. Functional treatment of aramid fibers: put the above-mentioned hydrolyzed aramid fibers into a mixture of thionyl chloride and N,N-dimethylformamide w...

Embodiment 3

[0072] This embodiment provides a method for preparing nano-zinc oxide modified aramid fibers, and the specific preparation steps are as follows:

[0073] Step 1: Functional treatment of aramid fiber:

[0074] a. Preparation of hydrolyzed aramid fiber: firstly, the aramid fiber (heterocyclic aramid F-368, Zhonglan Chenguang Chemical Research Institute) is wound on a polytetrafluoroethylene square frame, and then immersed in a concentration of 30wt% sodium hydroxide In the solution, treat it at a temperature of 50°C and a stirring speed of 200r / min for 30min, rinse it with deionized water for 4 times; immerse the fiber treated with sodium hydroxide in 30% hydrochloric acid for 30s, rinse it with deionized water 4 times, followed by vacuum drying in an oven at 120°C for 1 hour to obtain hydrolyzed aramid fibers;

[0075] b. Functional treatment of aramid fiber: Put the above-mentioned hydrolyzed aramid fiber into a mixture of thionyl chloride and N,N-dimethylformamide with a vo...

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Abstract

The invention relates to aramid fiber with the modified surface. The preparation method of the nanometer zinc oxide modified aramid fiber comprises the steps that the aramid fiber is subjected to surface functionalization, zinc oxide nanometer particles are grafted and grow on the surface of the aramid fiber, and zinc oxide nanowires are grafted and grow on the surface of the aramid fiber. The aramid fiber has the advantages that modification conditions are mild, and the technology is simple; the combining firmness of the nanometer zinc oxide and the aramid fiber is obviously improved; the bonding performance of resin and modified fiber and the ultraviolet-radiation resistance of the fiber is remarkably enhanced. Compared with unmodified aramid fiber, the interface shear strength of epoxyresin and the modified aramid fiber can be increased by 37-61%; after the modified aramid fiber is subjected to ultraviolet radiation testing, the stretching strength retention rate is increased from78.3% to 96.3-97.6%.

Description

technical field [0001] The invention relates to an aramid fiber modified by nano-zinc oxide, in particular to a modification method for improving the adhesion between the aramid fiber and matrix resin and the ultraviolet radiation resistance. Background technique [0002] Aramid-reinforced polymer-based composites have the characteristics of light weight, high specific strength and high specific modulus, and are widely used in various fields such as aviation, aerospace, military, and machinery. However, because the molecular structure of aramid fiber contains a large number of inert benzene rings and high crystallinity, the surface activity of the fiber is very low, and the interface bonding strength between the fiber and the resin matrix is ​​weak; Under light irradiation, it is easy to break and cause fiber aging and degradation. Therefore, in order to take into account both good surface bonding performance and ultraviolet radiation resistance, aramid fiber has been widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/44D06M13/513D06M13/265D06M11/38C08L63/00C08L77/10C08J5/06D06M101/36
Inventor 滕翠青马立翔张晶威
Owner DONGHUA UNIV
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