A kind of 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, reducing the mechanical properties of composite materials, and easily generating bubbles, avoiding agglomeration or uneven dispersion, reducing thermal expansion coefficient, and improving wettability. Effect

Inactive Publication Date: 2019-11-08
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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Effect test

preparation example Construction

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

[0025] A) The continuous fiber is pretreated to obtain the treated continuous fiber;

[0026] Dissolve the nano-filler in a solvent and ultrasonically to obtain a nano-dispersion;

[0027] B) Connect the treated continuous fiber with an electrostatic generator, immerse it in the nano-dispersion solution, sonicate, and dry to obtain a nano-modified continuous fiber;

[0028] C) Infiltrating and curing the nano-modified continuous fiber with the resin 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 first pretreats continuous fibers to obtain treated continuous fibers.

[0030] The continuous fiber of the present invention is fiber yarn or fiber cloth; the type of continuous fiber is selected from one of glass fiber, basalt fiber, carbon fiber and...

Embodiment 1

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

[0056] Step 2: Dissolve nano-SiC with a particle size of 50nm in anhydrous ethanol with a concentration of 10%, and use ultrasound to disperse the nanoparticles in anhydrous ethanol evenly 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...

Embodiment 2

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

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

[0062] Step 3: Connect the carbon fiber cloth to the electrostatic generator (output positive charge), the electrostatic generator ...

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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 technical field of materials, 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 composite materials have been widely used in many fields such as aircraft, aerospace, automobiles, electronics, sporting goods, etc. due to their light weight, high strength, excellent mechanical properties, and easy design and manufacturing. The performance of resin-based fiber-reinforced composites is determined by factors such as resin, fiber, resin fiber interface bonding strength, and manufacturing processes. Such composite materials are usually composed of a resin matrix and reinforcing fibers. The resin can be thermosetting and thermoplastic resins. The reinforcing fibers can be glass fibers, carbon fibers, etc., or a mixture of them. However, due to the large difference in the thermal expansion coefficient of the res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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