Preparation method for polyimide composite material for automobile

A polyimide and composite material technology, which is applied in the field of preparing polyimide composite materials for automobiles, can solve the problems of insufficient environmental protection, high cost of raw materials, low degradability, etc., so as to save production costs and improve surface roughness. , the effect of enhancing lipophilicity

Inactive Publication Date: 2015-10-21
SUZHOU ZHENZHAN TECHCAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent mainly uses carbon fiber to strengthen the polyimide matrix to improve the rigidity, strength, and toughness of the composite material. The cost of raw materials used is high, the degradation is low, and it is not environmentally friendly.

Method used

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  • Preparation method for polyimide composite material for automobile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of polyimide composite material for automobile, its steps are as follows:

[0025] (1) Dry the sisal fiber after removing impurities, add the dried sisal fiber to the sodium hydroxide solution with a concentration of 72g / L and soak for 10 hours, take it out and wash it with dilute acid solution 3 times to obtain alkalized Sisal fiber is also dried, KH550 is dissolved in the acetic acid solution and stirred for 3 hours, wherein, the pH value of the acetic acid solution is 5.5, the acetic acid solution pH value of KH550 is adjusted to 7 with the ammoniacal liquor of 6% by mass fraction, let stand After 2 hours, the treatment solution was obtained. Add the dried alkalized sisal fiber into the treatment solution for ultrasonic dispersion for 3 hours, take it out and put it in a vacuum drying oven for 3 hours at 120°C to dry it for 3 hours, take it out, break it up, and pulverize it to get Modified sisal fiber for standby;

[0026] (2) Add talc ...

Embodiment 2

[0029] A kind of preparation method of polyimide composite material for automobile, its steps are as follows:

[0030] (1) Dry the sisal fiber after removing impurities, add the dried sisal fiber to the sodium hydroxide solution with a concentration of 72g / L and soak for 10 hours, take it out and wash it with dilute acid solution 3 times to obtain alkalized Sisal fiber is also dried, KH550 is dissolved in the acetic acid solution and stirred for 3 hours, wherein, the pH value of the acetic acid solution is 5.5, the acetic acid solution pH value of KH550 is adjusted to 7 with the ammoniacal liquor of 6% by mass fraction, let stand After 2 hours, the treatment solution was obtained. Add the dried alkalized sisal fiber into the treatment solution for ultrasonic dispersion for 3 hours, take it out and put it in a vacuum drying oven for 3 hours at 120°C to dry it for 3 hours, take it out, break it up, and pulverize it to get Modified sisal fiber for standby;

[0031] (2) Add talc ...

Embodiment 3

[0034] A kind of preparation method of polyimide composite material for automobile, its steps are as follows:

[0035] (1) Dry the sisal fiber after removing impurities, add the dried sisal fiber to the sodium hydroxide solution with a concentration of 72g / L and soak for 10 hours, take it out and wash it with dilute acid solution 3 times to obtain alkalized Sisal fiber is also dried, KH550 is dissolved in the acetic acid solution and stirred for 3 hours, wherein, the pH value of the acetic acid solution is 5.5, the acetic acid solution pH value of KH550 is adjusted to 7 with the ammoniacal liquor of 6% by mass fraction, let stand After 2 hours, the treatment solution was obtained. Add the dried alkalized sisal fiber into the treatment solution for ultrasonic dispersion for 3 hours, take it out and put it in a vacuum drying oven for 3 hours at 120°C to dry it for 3 hours, take it out, break it up, and pulverize it to get Modified sisal fiber for standby;

[0036] (2) Add talc ...

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Abstract

The invention provides a preparation method for a polyimide composite material for an automobile. The method comprises the following steps that 1, impurities in sisal fiber are removed, the sisal fiber is dried and added into a sodium hydroxide solution to be soaked, the sisal fiber is taken out to be washed to obtain alkalified sisal fiber, a silane coupling agent is dissolved into an acetic acid solution, the PH value is adjusted to be 7 through ammonium hydroxide, conditioning fluid is obtained after standing, and the alkalified sisal fiber is added into the conditioning fluid for ultrasonic dispersion and taken out for drying, taking, dispersion and smashing to obtain modified sisal fiber; 2, talcum powder is added into a mixing machine to be stirred, then a titanate coupling agent is added, and modified talcum powder is obtained after taking out and drying are performed; 3, polyimide, the modified sisal fiber and the modified talcum powder are added into a stirring machine for stirring and mixing and then taken out to be put into a mold for compression molding forming, and mold stripping is performed to obtain the polyimide composite material for the automobile. According to the preparation method, raw materials are cheap and easy to obtain, the production cost is saved, and the obtained composite material has the good mechanical performance, has the certain degradability and is environmentally friendly.

Description

Technical field: [0001] The invention relates to a polyimide composite material, in particular to a preparation method of a polyimide composite material for automobiles. Background technique: [0002] Due to the outstanding contribution of automobile lightweight to energy saving and efficiency enhancement, major automobile manufacturers in the world are reducing the body weight as much as possible, which has also triggered the development and application of various new lightweight materials, such as High-strength steel, aluminum alloy, magnesium alloy, and resin-based composite materials have increasingly become the hotspots and new darlings of applied research on new automotive materials. Among them, resin-based composite materials have attracted much attention due to their significant advantages such as low investment, large design freedom, light weight, high strength, and corrosion resistance. The material of choice for car models. Resin-based composites include thermos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L97/02C08K9/04C08K3/34
CPCC08L79/08C08L2201/06
Inventor 黄文成
Owner SUZHOU ZHENZHAN TECHCAL MATERIAL CO LTD
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