Method for preparing poly(p-phenylene benzobisoxazole)/polyimide composite material

A technology of polyphenylene benzoxazole and polyimide, which is applied in the field of composite material preparation, can solve the problems of inconspicuous fiber-matrix interface performance and the decrease of PBO fiber strength, so as to improve mechanical properties and tribological properties , low cost and simple process

Inactive Publication Date: 2007-10-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the interface shear strength of the plasma-treated PBO fiber has increased, the strength of the PBO fiber has slightly decreased. The corona treatment method has no obvious effect on improving the interface performance between the fiber and the matrix. The coupling agent method has improved to a certain extent. The binding force of the interface phase, but for PBO fibers used at high temperatures, higher requirements are placed on the heat resistance of the coupling agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw materials used include: polyimide resin powder, PMR type KH-304 thermosetting polyimide developed by the Institute of Chemistry, Chinese Academy of Sciences. PBO fiber: produced by Japan Toyobo Co., Ltd. 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.

[0020] The weight percentages of each component of the raw material are as follows:

[0021] Polyimide: 80%

[0022] Chopped PBO fiber (3 ~ 15mm): 15%

[0023] Molybdenum disulfide: 5%

[0024] The PBO fiber is pretreated first, and the PBO fiber is immersed in the above-mentioned rare earth modifier at room temperature, soaked for 2 hours, filtered and dried.

[0025] Mix polyimide, PBO fiber and auxiliary material molybdenum disulfide according to the above ratio, then carry out mechanical strong stirring, after stirring evenly, put the mi...

Embodiment 2

[0028] The raw materials used include: polyimide resin powder, PMR type KH-304 thermosetting polyimide developed by the Institute of Chemistry, Chinese Academy of Sciences. PBO fiber: produced by Japan Toyobo Co., Ltd. The components by weight of the rare earth modifier are as follows: 1.5% of rare earth compounds, 96% of ethanol, 0.2% of ethylenediaminetetraacetic acid, 0.8% of ammonium chloride, 0.5% of nitric acid and 1% of urea.

[0029] The weight percentages of each component of the raw material are as follows:

[0030] Polyimide: 85%

[0031] Chopped PBO fiber (3 ~ 15mm): 10%

[0032] Molybdenum disulfide: 5%

[0033] First soak the PBO fiber in the above-mentioned rare earth modifier for 4 hours at room temperature, filter and dry. Then mix polyimide, PBO fiber, and molybdenum disulfide according to the above ratio, and carry out mechanical strong stirring. After stirring evenly, put the mixed powder into the muffle furnace with the mold for molding. Minutes, the ...

Embodiment 3

[0035] The raw materials used are the same as in Example 1, except that the ratio of the rare earth modifier is changed: 2% of the rare earth compound, 95% of ethanol, 0.5% of ethylenediaminetetraacetic acid, 1% of ammonium chloride, 0.5% of nitric acid, and 1% of urea. The PBO fiber is pretreated first, treated with the above-mentioned rare earth modifier, the PBO fiber is immersed in the modifier at room temperature, soaked for 3 hours, filtered, and dried.

[0036] Mix polyimide, PBO fiber, and molybdenum disulfide according to the ratio of Example 1, and then carry out mechanical stirring. After stirring evenly, put the mixed powder into the muffle furnace with the mold for molding, and directly raise the furnace temperature to about 380°C , kept for 60 minutes to form the mixed powder, took out the molded composite material together with the mold, and cooled with room temperature to prepare the PBO fiber / polyimide wear-resistant composite material.

[0037] The above mate...

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Abstract

The related preparation method for polyphenylene benzoazole (PBO) fibre / polyimide composite material comprises: surface treating the PBO fiber by the rare-earth modifier with rare-earth compound, ethanol, EDTA, NH4Cl, HNO3 and urea at room temperature; mechanical blending 10-15% PBO fiber, polyimide powder and MoS2 to load in muffle furnace for the target with well mechanical and frictional properties. This invention produces no pollution with low cost.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a rare-earth modified polyphenylenebenzoxazole (PBO) fiber / polyimide composite material. Imide composite materials to obtain relatively high interfacial bonding force and obtain high-performance composite materials. Background technique [0002] Thermosetting polyimide is a high temperature resistant polymer, which can maintain the main physical properties at 550°C for a short time, and can be used at close to 330°C for a long time. Among high temperature resistant engineering plastics, it is one of the most valuable varieties. Polyimide can withstand extremely low temperature, such as in liquid helium at -269°C, it will not be brittle. Polyimide also has good mechanical properties, dimensional and oxidation stability, chemical resistance and radiation resistance, as well as good toughness and flexibility, and has excellent wear resistance in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08J5/06D01F6/92D06M13/467C08K3/30
Inventor 程先华李健梁木子蒋喆
Owner SHANGHAI JIAOTONG UNIV
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