Process for preparing composite of rare earth modified glass fibre/polyimide

A glass fiber and polyimide technology is applied in the field of preparation of rare earth modified glass fiber/polyimide composite materials, which can solve the problems of easy crack initiation, easy degradation, and large fiber damage, and achieves improved mechanical properties and Tribological properties, good mechanical properties and tribological properties, the effect of simple process methods

Inactive Publication Date: 2008-01-16
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coupling agent method improves the binding force of the interfacial phase to a certain extent and improves the use value of the composite material, but the treatment of the glass fiber surface by the conventional coupling agent method cannot achieve the desired effect. The shortcomings of stability, easy degradation, greater damage to fibers, greater fiber surface viscosity, and poor processability lead to poor interfacial bonding of composite materials; on the other hand, the coupling agent is not enough to make the glass fiber and resin matrix have excellent The interfacial bonding force, especially when subjected to impact load, is easy to initiate cracks, and the organic interface performance is reduced at high temperature, which affects the friction and wear properties of resin matrix composites, mainly manifested in its impact resistance under oil-free or boundary lubrication conditions. poor wear performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw materials used include: polyimide resin powder, GCPI produced by Changzhou Guangcheng Plastic Co., Ltd. TM Type, 150 mesh. Glass fiber: Alkali-free milled glass fiber produced by Nanjing Glass Fiber Research and Design Institute. The component weight percent of the rare earth modifier used is: 0.1% of rare earth compound, 97% of ethanol, 0.05% of ethylenediaminetetraacetic acid, 0.1% of ammonium chloride, 0.02% of nitric acid and 0.03% of urea.

[0023] The weight percentages of each component of the raw material are as follows:

[0024] Polyimide: 85%

[0025] Fiberglass: 14%

[0026] Auxiliary material: 1% (0.5% molybdenum disulfide + 0.5% medium chrome yellow)

[0027] First put the glass fiber in a muffle furnace at 500°C for 1 hour to remove the residual organic matter on the surface, then soak the glass fiber in the rare earth modifier at room temperature for 2 hours, filter and dry.

[0028] Then mix polyimide, glass fiber and auxiliary materials acc...

Embodiment 2

[0031] The raw materials used include: polyimide resin powder, GCPI produced by Changzhou Guangcheng Plastic Co., Ltd. TM Type, 150 mesh. Glass fiber: Alkali-free milled glass fiber produced by Nanjing Glass Fiber Research and Design Institute. The component weight percent of the rare earth modifier used is: 0.1% of rare earth compound, 97% of ethanol, 0.05% of ethylenediaminetetraacetic acid, 0.1% of ammonium chloride, 0.02% of nitric acid and 0.03% of urea.

[0032] The weight percentages of each component of the raw material are as follows:

[0033] Polyimide: 80%

[0034] Fiberglass: 15%

[0035] Auxiliary material: 5% (3% molybdenum disulfide + 2% medium chrome yellow)

[0036] First put the glass fiber in a muffle furnace at 550°C for 0.5 hour ablation to remove the residual organic matter on the surface, then soak the glass fiber in the rare earth modifier at room temperature for 4 hours, filter and dry.

[0037]Then mix polyimide and glass fiber auxiliary material...

Embodiment 3

[0040] The raw material that adopts is the same as embodiment 1, only changes the proportioning of rare earth modifier: the component weight percent of the rare earth modifier that adopts is: rare earth compound 2%, ethanol 95%, ethylenediaminetetraacetic acid 0.5%, chlorine Ammonium chloride 1%, nitric acid 0.5%, urea 1%.

[0041] First put the glass fiber in a muffle furnace at 530°C for 0.5 hour ablation to remove the residual organic matter on the surface, then soak the glass fiber in the rare earth modifier at room temperature for 3 hours, filter and dry.

[0042] Then mix polyimide and glass fiber auxiliary materials according to the above ratio, and carry out mechanical strong stirring. After stirring evenly, put the mixed powder into the mold of a flat vulcanizing machine for molding. First, raise the temperature of the furnace to about 280°C and keep it for 60 minutes. , pre-molding the preformed blank, at this time the pressure is controlled at about 14MPa, and then ...

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Abstract

The invention relates to a manufacture method for rare earth modifying glass fiber / polyimide compounding material that includes the following steps: taking pretreatment to the glass fiber, using rare earth modifier to take surface modification treatment to the glass fiber, mixing the treated short cut or powder glass fiber with polyimide and controlling the weight ratio of glass fiber to be 10-20%, adding assistant material, molding and sintering. The invention is simple technology, low cost, and no pollution to the environment.

Description

technical field [0001] The present invention relates to a preparation method of a composite material, in particular to a preparation method of a rare-earth modified glass fiber / polyimide composite material, which uses a method of filling a polyimide composite material with glass fiber after rare earth surface treatment to obtain The relatively high interfacial bonding force increases the hardness of the polyimide resin matrix, thereby improving the mechanical properties and wear resistance of the composite material. Background technique [0002] Polyimide is a kind of organic polymer containing imide groups in the main chain, which has the advantages of excellent thermal stability, high vacuum, radiation resistance and low friction and wear. Among them, addition polyimide has Excellent processing performance and outstanding thermal oxidation stability, but poor wear resistance when used alone, so adding various fillers to the matrix to make polyimide composite components is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/02C08K7/14
Inventor 程先华李健梁木子蒋喆
Owner SHANGHAI JIAOTONG UNIV
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