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Resin-based fiber reinforced composite material and preparation method thereof

A composite material and fiber-reinforced technology, applied in the field of materials, can solve the problems of affecting the deposition of nanoparticles, the reduction of the mechanical properties of composite materials, and the easy generation of air bubbles, so as to avoid agglomeration or uneven dispersion, reduce thermal expansion coefficient, and eliminate residual stress. Effect

Inactive Publication Date: 2019-01-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, after the nano filler is mixed into the resin, due to the high viscosity of many resins, the mixing is not very uniform, and it is easy to generate air bubbles during the mixing process.
In the process of resin injection impregnating fibers, nanofillers are easy to agglomerate, not only does not reduce the influence of residual stress on the performance of resin-based fiber reinforced composites, but also may produce new defects, and the improvement of the resin fiber interface bond strength is not obvious, and finally No effect or negative effect on the properties of resin-based fiber composites, leading to a decrease in the mechanical properties of the composites
Although the electrophoretic deposition process can solve the problem of nanoparticle agglomeration, the problem of uneven dispersion of nanoparticles still exists, and the process of electrophoretic deposition is accompanied by the electrolysis of water. The bubbles produced by water electrolysis are easy to adhere to the surface of the fiber, and a large number of bubbles affect The deposition of nanoparticles, the binding force between nanoparticles and fibers is weak, and the nanoparticles are easy to peel off

Method used

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Examples

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preparation example Construction

[0024] The invention provides a method for preparing a resin-based fiber-reinforced composite material, comprising:

[0025] A) pretreating the continuous fiber to obtain the treated continuous fiber;

[0026] Dissolve the nanofiller in the solvent and ultrasonically obtain the nanodispersion;

[0027] B) connecting the treated continuous fiber to an electrostatic generator, immersing it in a nano-dispersion liquid, ultrasonication, and drying to obtain a nano-modified continuous fiber;

[0028] C) impregnating the nano-modified continuous fiber with resin and curing to obtain a resin-based fiber-reinforced composite material.

[0029] The method for preparing a resin-based fiber-reinforced composite material provided by the present invention firstly pretreats continuous fibers to obtain treated continuous fibers.

[0030] The continuous fiber in the present invention is fiber filament or fiber cloth; the type of the continuous fiber is selected from one of glass fiber, basa...

Embodiment 1

[0055] Step 1: Put carbon fiber cloth (TC-35, unidirectional carbon fiber cloth, 300g.m 2 ) with absolute ethanol and deionized water to remove dust, oil stains, sizing agents and other sundries on the surface of the carbon fiber cloth; then put the cleaned carbon fiber cloth into hydrogen peroxide for 1 hour; take out the carbon fiber cloth and put it in concentrated nitric acid React for 1 hour; finally, after repeatedly washing the carbon fiber cloth with deionized water, dry the carbon fiber cloth at 75°C for 8 hours, then cool it for later use, and introduce active groups on its surface.

[0056] Step 2: Dissolve nano-SiC with a particle size of 50nm in 10% absolute ethanol, and use ultrasound to disperse the nanoparticles evenly in absolute ethanol to obtain a nano-dispersion with a concentration of 10%; ultrasonic power: 100w, power density : 0.5w / cm 2 , Time: 20min.

[0057] Step 3: Connect the carbon fiber cloth to the electrostatic generator (output positive charge...

Embodiment 2

[0060] Step 1: Put carbon fiber cloth (TC-35, unidirectional carbon fiber cloth, 300g.m 2 ) with absolute ethanol and deionized water to remove dust, oil stains, sizing agents and other sundries on the surface of the carbon fiber cloth; then put the cleaned carbon fiber cloth into hydrogen peroxide for 1 hour; take out the carbon fiber cloth and put it in concentrated nitric acid React for 1 hour; finally, after repeatedly washing the carbon fiber cloth with deionized water, dry the carbon fiber cloth at 75°C for 8 hours, then cool it for later use, and introduce active groups on its surface.

[0061] Step 2: Dissolve nano-SiC with a particle size of 80nm in acetone with a concentration of 20%, and use ultrasonic waves to disperse the nanoparticles evenly in absolute ethanol to obtain a nano-dispersion with a concentration of 10%; ultrasonic power: 120w, power density: 0.6 w / cm 2 , Time: 15min.

[0062] Step 3: Connect the carbon fiber cloth to the electrostatic generator (o...

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Abstract

The invention provides a preparation method for a resin-based fiber reinforced composite material. The preparation method comprises the following steps: pretreating a continuous fiber to obtain a treated continuous fiber; dissolving a nano-filler in a solvent and performing ultrasonic treatment to obtain a nano-dispersion; connecting the treated continuous fiber to an electrostatic generator, immersing the continuous fiber in the nano-dispersion, performing ultrasonic treatment and drying to obtain nano-modified continuous fiber; and infiltrating and curing the nano-modified continuous fiber with resin to obtain the resin-based fiber reinforced composite material. According to the invention, the nano-filler is electrostatically adsorbed on the surface of the continuous fiber; since nano-particles are adsorbed on the surface of the fiber, a convex-concave undulant structure is formed on the surface of the fiber, so the surface roughness of the fiber is further increased; and the substantial increase of the surface roughness of the fiber is beneficial for increasing a contact area between the fiber and the matrix resin, improving the wettability of the fiber and the interfacial bonding strength between the fiber and the matrix resin, and enhancing the mechanical properties of the resin-based fiber reinforced composite material.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a resin-based fiber-reinforced composite material and a preparation method thereof. Background technique [0002] In recent years, resin-based fiber-reinforced composites have been widely used in many fields such as aircraft, aerospace, automobiles, electronics, and sporting goods due to their light weight, high strength, excellent mechanical properties, and ease of design and manufacture. The performance of resin-based fiber-reinforced composites is determined by factors such as resin, fiber, resin-fiber interface bond strength, and manufacturing process. This type of composite material is usually composed of a resin matrix and reinforcing fibers. The resin can be thermosetting or thermoplastic resin, and the reinforcing fibers can be one or a mixture of glass fibers and carbon fibers. However, due to the large difference in the thermal expansion coefficient of the resin / fibe...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/02C08K7/06C08K3/34B29C70/02B29C70/36
CPCB29C70/02B29C70/36C08K3/34C08K7/06C08K9/02C08L63/00
Inventor 蒲永锋马芳武田广东
Owner JILIN UNIV
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