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Preparation method for poly-p-phenylene-benzo-dioxazole fibre/epoxy resin composite material

A technology of benzobisoxazole and epoxy resin, which is applied in the field of composite material preparation, can solve the problems of low activity, poor interface bonding performance, and low interface shear strength, so as to improve mechanical properties and tribological properties, The process method is simple and the effect of ideal tensile strength

Inactive Publication Date: 2008-12-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure endows the PBO fiber with the above-mentioned excellent properties, but also causes the fiber surface to be very smooth and has low activity, and it cannot infiltrate well with almost all resin matrices, so that the interfacial bonding performance of PBO fiber and resin matrix is ​​poor, and the interfacial shear The shear strength is low, which affects the comprehensive performance of composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw materials used include: epoxy resin, E-51 bisphenol A type epoxy resin produced by Shanghai Resin Factory; curing agent is 593 modified aromatic amine curing agent (curing at room temperature); PBO fiber, Zylon-AS, TOYOBO Japan Manufactured by Toyobo Corporation. The rare earth modifier is formulated according to the following weight percentages:

[0018] Lanthanum chloride: 3%, ethanol: 96%, ethylenediaminetetraacetic acid (EDTA): 0.1%, ammonium chloride: 0.5%, nitric acid: 0.1%, urea: 0.3%

[0019] First soak the PBO fiber in the rare earth modifier for 2 hours at room temperature, filter and dry. Then add a curing agent to the epoxy resin to form an epoxy glue solution, wherein the weight ratio of the curing agent to the epoxy resin is 1:4. The treated PBO fiber is immersed in epoxy glue to make prepreg, and the content of epoxy glue in the prepreg is controlled to be 35%. Then the composite material is prepared by wet winding molding process, and the wind...

Embodiment 2

[0022] The raw materials used include: epoxy resin, E-51 bisphenol A type epoxy resin produced by Shanghai Resin Factory; curing agent is 2-ethyl-4 methylimidazole produced by Tianjin Chemical Reagent Factory; PBO fiber, Zylon- AS, produced by TOYOBO Japan Toyobo Co., Ltd. The rare earth modifier is formulated according to the following weight percentages:

[0023] Lanthanum oxide: 2%, ethanol: 97.8%, ethylenediaminetetraacetic acid (EDTA): 0.05%, ammonium chloride: 0.1%, nitric acid: 0.02%, urea: 0.03%

[0024] First soak the PBO fiber in the above-mentioned rare earth modifier for 3 hours at room temperature, filter and dry in a vacuum oven. Then add a curing agent to the epoxy resin to form an epoxy glue solution, wherein the weight ratio of the curing agent to the epoxy resin is 3:17. The treated PBO fiber is immersed in epoxy glue to make prepreg, and the content of epoxy glue in the prepreg is controlled to be 40%. Then the composite material is prepared by wet windin...

Embodiment 3

[0027] The raw material that adopts is with embodiment 1, and the component weight percent of the rare earth modifier that adopts is:

[0028] Cerium chloride 10%, ethanol 87%, ethylenediaminetetraacetic acid (EDTA) 0.5%, ammonium chloride 1%, nitric acid 0.5%, urea 1%.

[0029] First soak the PBO fiber in the above-mentioned rare earth modifier for 5 hours at room temperature, filter and dry. Then add a curing agent to the epoxy resin to form an epoxy glue solution, wherein the weight ratio of the curing agent to the epoxy resin is 1:10. The treated PBO fiber is immersed in epoxy glue to make prepreg, and the content of epoxy glue in the prepreg is controlled to be 45%. Then the composite material is prepared by wet winding molding process, and the winding process is carried out on a numerically controlled fiber winding machine. The mold adopts a flat core mold with a size of 270mm×270mm. Wrap the prepreg on a flat mandrel to a thickness of 30mm, cure at 25°C for 30 hours,...

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Abstract

The invention relates to a method for preparing a poly (p-phenylene-benzobisoxazole) fiber / epoxide resin composite material. The surface modification treatment is performed on the poly (p-phenylene-benzobisoxazole) fiber by using a rare-earth modifying agent, a firming agent is added into the epoxide resin to prepare an epoxy colloid, the treated poly (p-phenylene-benzobisoxazole) fiber is immersed into the epoxy colloid to prepare a prepreg compound, the content of the prepreg compound in the epoxy colloid is controlled to between 35 and 45 percent, and then the composite material is prepared by using the wet method filament winding process. The winding process is performed on a digital control fiber winder, and the prepreg compound is wound on a flat core model to certain thickness and is subjected to solidifying, demoulding, finishing and forming, wherein, the rare-earth modifying agent comprises lanthanum chloride, ethanol, ethylenediamine tetracetic acid, ammonium chloride, nitric acid and carbamide. The method has simple technique and low cost, and does not pollute the environment. The composite material prepared by the technique has good mechanical property.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a rare-earth modified poly-p-phenylenebenzobisoxazole (PBO) fiber / epoxy resin composite material, which is filled with PBO fiber treated with rare earth surface Epoxy resin composite materials to obtain relatively high interfacial bonding force, thereby improving the practical engineering application value of composite materials. Background technique [0002] Epoxy resins are a diverse and ever-evolving class of synthetic resins. Because epoxy resin has strong bonding properties, excellent mechanical properties, chemical resistance, electrical insulation properties and dimensional stability, it can be used as a matrix resin for adhesives, coatings, fluxes and composite materials, and is widely used in machinery , electrical machinery, chemical industry, aerospace, shipbuilding, automobile, construction and other departments. However, epoxy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L79/04C08J5/06C08K5/18C08K5/3445B29C70/32B29C71/00
CPCC08J5/248
Inventor 程先华俞亮亓永孙志永
Owner SHANGHAI JIAO TONG UNIV
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