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Preparation method of wear-resistant composite material with nanometer gradient fiber reinforcement

A composite material and fiber reinforced technology, which is applied in the field of functional composite material manufacturing, can solve the problems of increasing the manufacturing cost of composite material structure, increasing the weight of composite material structure, and poor bonding of composite material matrix, so as to improve the interlaminar shear performance, The effect of saving material usage rate and reducing manufacturing cost

Active Publication Date: 2020-08-18
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through the preparation method of surface spraying, the high-density wear-resistant nanoparticles often have the problem of not being strong with the composite material matrix and falling off easily.
The method of slurry pre-impregnation is to firstly make nano-particles and continuous fibers into pre-preg by pre-preg process, and then prepare molding by curing. Since wear-resistant parts are usually worn on one side, this method not only increases the strength of the composite structure weight, but also wastes material, increasing the manufacturing cost of composite structures

Method used

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  • Preparation method of wear-resistant composite material with nanometer gradient fiber reinforcement
  • Preparation method of wear-resistant composite material with nanometer gradient fiber reinforcement
  • Preparation method of wear-resistant composite material with nanometer gradient fiber reinforcement

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preparation example Construction

[0036] 1) Preparation of resin film dispersed with nano wear-resistant particles

[0037] Mix and disperse the nano-wear-resistant particles and the resin containing solvent under a high-speed mixer for 2-3 hours, then dissolve the film-forming agent in the dispersed nano-wear-resistant particles and resin mixture, and select high temperature according to the performance setting The curing agent is mixed, and finally, the obtained resin system (that is, the resin dispersed with nano wear-resistant particles) is poured on an iron plate at 90-120°C, and cast to form a resin film containing dispersed nano wear-resistant particles;

[0038] The wear-resistant nanoparticles are one or more of graphene nanoparticles, boron nitride nanoparticles, and silicon carbide nanoparticles.

[0039] The surface of wear-resistant nanoparticles can be modified through different processes to meet the wear resistance requirements of parts, such as surface grafting, oxidation, etc., but not limited...

Embodiment 1

[0067] In this embodiment, the preparation of composite brake pads is taken as an example. Graphene nanoparticles are used to improve the wear resistance of fiber-reinforced cyanate ester composite materials, reduce the surface friction coefficient of brake pads, reduce wear, and prolong service life.

[0068] The concrete method of this embodiment is:

[0069] 1) Preparation of resin film dispersed with graphene nanoparticles. In parts by mass, 0.5 parts of graphene nanoparticles are added to 300 parts of the dimethyl phthalate resin system, wherein in the dimethyl phthalate resin system, the dimethyl phthalate resin and The mass ratio of acetone is 1:2. Mix and disperse under the high-speed mixer for 3 hours, then add 100 parts of N,N'-(4,4'-methylenediphenyl)bismaleimide, and ultrasonically disperse at room temperature for 30 minutes Stir for 2 hours.

[0070] The dispersed graphene nanoparticles and resin mixture were stirred at 180° C. for 12 hours, and the solvent was...

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Abstract

The invention discloses a preparation formation method for a wear-resistant composite with reinforced nano-gradient fibers. The preparation formation method comprises the following steps of arrangingcut fiber cloth in a stacking manner, and performing needle threading and sewing on the fiber cloth by using a suture line; and laying and pasting a cut resin film, on which nanometer wear-resistant particles are dispersed, along the surface of a die, and putting the fiber cloth on the resin film to obtain a pre-formed body; and laying the pre-formed body with a microporous filter film, constructing a vacuum flow guide system on the microporous filter film, sealing the die with a vacuum bag film to form a die cavity, performing vacuum pumping treatment on the sealed die cavity, and performingheating and pre-curing on the die; and finally performing curing. In the preparation formation method provided by the invention, through suture needle holes in the fiber cloth, the wear-resistant nano-particles form gradient distribution in a thickness direction of the composite, so that the preparation cost is reduced; due to gradient distribution of the wear-resistant nano-particles, a part still has certain wear resistance after being worn for a period of time, and the service life is prolonged; and through a sewing process of the fiber cloth, an acting force among multiple layers of fibersis strengthened, and the interlayer shearing performance of a wear-resistant part of the composite is improved.

Description

technical field [0001] The invention belongs to the field of functional composite material manufacturing, and proposes a preparation and molding method of a wear-resistant composite material reinforced with nano-gradient fibers. Background technique [0002] Materials with high hardness, high strength, good wear resistance and corrosion resistance are usually used in mining, electric power, automobile, mechanical processing and other fields. Ceramic materials, high manganese steel or wear-resistant alloys are currently commonly used wear-resistant materials, but their Its high brittleness and weight limit its scope of application. Fiber-reinforced resin-based composite materials have the advantages of high specific strength, high corrosion resistance, and strength can be designed. Wear-resistant composite materials use high-strength, high-elastic fibers as a matrix, and wear-resistant nanoparticles are a new class of functionally enhanced materials. Good wear resistance, im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/44B29C70/54B29K105/08
Inventor 肖鸿韩伟王奔明越科段玉岗
Owner XI AN JIAOTONG UNIV
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