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Structure and function integrated carbon fiber/epoxy composite material and preparation method thereof

A composite material and carbon fiber technology, applied in the field of structural-function integrated carbon fiber/epoxy composite material and its preparation, can solve the problems of increasing electromagnetic wave attenuation ability, poor phase affinity, etc., achieve excellent mechanical properties, reduce electromagnetic pollution, excellent Effect of interlaminar shear properties

Active Publication Date: 2022-02-01
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the poor interfacial affinity of the carbon fiber / epoxy resin composite material in the prior art, which is the weak point of the composite material, the present invention introduces the petal-shaped transition metal sulfide nano-microstructure through the surface of the carbon fiber, which has three purposes : 1. Improve the roughness of the interface, which is beneficial to epoxy infiltration and increase the contact area of ​​the two phases of the interface; 2. Provide mechanical interlocking effect, so that it is more difficult for the material to break and peel off between layers when it is under load. It exhibits excellent interlayer shear performance; 3. The introduction of tungsten disulfide nanosheets with high specific surface area and high dielectric loss combined with carbon fibers increases the electromagnetic wave attenuation ability of the material, improves the electromagnetic shielding performance and endows the composite material with a certain electromagnetic absorption function

Method used

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  • Structure and function integrated carbon fiber/epoxy composite material and preparation method thereof
  • Structure and function integrated carbon fiber/epoxy composite material and preparation method thereof
  • Structure and function integrated carbon fiber/epoxy composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 1) Soak a carbon fiber cloth cut into a size of 7×3cm in an acetone solution, keep it at room temperature for 48 hours for desizing treatment, and then repeatedly rinse the desized carbon fiber cloth with ethanol and deionized water to remove The residual slurry and acetone on the surface were dried to obtain a desized carbon fiber cloth; the desized carbon fiber cloth was soaked in an ethanol solution, and the carbon fiber cloth was ultrasonically cleaned for 1 hour with an ultrasonic device with a power of 600W, and then, using ethanol, Rinse repeatedly with deionized water to remove residual impurities and dust on the surface and dry; weigh 10mmol, 40mmol and 20mmol of sodium tungstate hexahydrate, thiourea and hydroxylamine hydrochloride and dissolve them in 40mL of deionized water to prepare mixed solution A , then weighed 0.375g of cetyltrimethylammonium bromide (CTAB) and 0.125g of fatty alcohol sodium isethionate dissolved in 40mL of deionized water to configure ...

Embodiment 2

[0040] Other conditions and operations are the same as in Example 1, except that in step 1), the amount of surfactant is changed to 0.42g cetyltrimethylammonium bromide and 0.08g fatty alcohol sodium isethionate. The interlaminar shear strength of the carbon fiber composite material obtained in this example is 52.4 MPa, and the minimum reflection loss value of electromagnetic absorption at 4 GHz reaches -22 dB.

Embodiment 3

[0042] Other conditions and operation are identical with embodiment 1, difference is that in step 1), the consumption of surfactant is changed into 0.25g cetyltrimethylammonium bromide and 0.25g fatty alcohol sodium isethionate.

[0043] The interlaminar shear strength of the carbon fiber composite material obtained in this example is 48.2 MPa, and the minimum reflection loss value of electromagnetic absorption at 4 GHz reaches -21 dB.

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Abstract

The invention relates to a structure and function integrated carbon fiber / epoxy composite material and a preparation method thereof. The composite material comprises a carbon fiber fabric reinforcing material, an epoxy resin matrix material and functional nanoscale transition metal sulfide modified on the surface of carbon fiber. The transition metal sulfide is petal-shaped tungsten sulfide synthesized by a hydrothermal method. According to the invention, dense nanoflower microstructures are introduced on the surfaces of the carbon fibers through the compounded surfactant by adopting a hydrothermal method, so that the contact area of the fibers and an epoxy resin matrix is increased, and the interface bonding of the matrix resin and the carbon fibers is tighter, so that the composite material shows excellent interlaminar shear performance. And due to the introduction of the tungsten sulfide nanoflowers, the composite material is endowed with a certain electromagnetic absorption function.

Description

technical field [0001] The invention belongs to the field of preparation of polymer-based composite materials, and in particular relates to a structure-function integrated carbon fiber / epoxy composite material and a preparation method thereof. Background technique [0002] Carbon fiber / epoxy resin composites (Carbon Fiber Reinforced Epoxy Resin Composites, CFRERC) is a kind of advanced composite material with epoxy resin as matrix and carbon fiber as reinforcement material. In addition to the main properties of advanced composite materials - high specific strength and specific modulus, it also has a series of excellent properties such as high fatigue strength, small thermal expansion coefficient, corrosion resistance, stable structure size, and designable material properties. As a new type of advanced composite material, EP / CF composite material can be used as a structural material to carry loads, which can meet the strict requirements in fields such as weight, strength, sti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K9/02C08K7/06C08K7/00C08J5/06
CPCC08J5/06C08J2363/02C08K9/02C08K7/06C08K7/00C08K2201/011C08K2201/005
Inventor 沈小军范梦漩朱松青管纪鹏党蕊琼郭少聪
Owner JIAXING UNIV
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