Method for surface modification of carbon fiber through graphene oxide

A graphene surface, carbon fiber technology, applied in the direction of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of carbon fiber surface inertness, low surface energy, poor thermal properties, etc., to improve mechanical properties and thermal stability, improve Interface properties, the effect of improving toughness

Inactive Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of high surface inertia, low surface energy, and poor mechanical and thermal properties of carbon fibers at present, thereby providing a method for modifying the surface of graphene oxide carbon fibers

Method used

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  • Method for surface modification of carbon fiber through graphene oxide
  • Method for surface modification of carbon fiber through graphene oxide
  • Method for surface modification of carbon fiber through graphene oxide

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specific Embodiment approach 1

[0028] Specific embodiment one: the method for a kind of graphene oxide surface modification carbon fiber of the present embodiment is to carry out according to the following steps:

[0029] 1. Prepare graphene oxide by modified Hummer's method:

[0030] a. Under the condition of ice-water bath, graphite powder and concentrated H with a mass concentration of 98% were successively 2 SO 4 、NaNO 3 and KMnO 4 Add it into a round-bottom flask and stir, heat up to 35°C, react for 7 hours, cool down, put it in an ice-water bath, and then add concentrated H with a mass concentration of 98% to the round-bottom flask 2 SO 4 and KMnO 4 , heated up to 35°C, and reacted for 12h; wherein, the graphite powder and the first added mass concentration of 98% concentrated H 2 SO 4 The mass ratio is 1:40~50; the graphite powder and NaNO 3 The mass ratio of is 2:1; Described graphite powder and the KMnO that add for the first time 4 The quality is 1:3; Described graphite powder and the mas...

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment is different from Embodiment 1 in that: the mass of carbon fiber and the volume of acetone described in step 2 are 1g:6mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the carbon fiber described in step 2 to the concentrated nitric acid with a mass fraction of 69% is 1g:6mL. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for surface modification of carbon fiber, in particular to a method for surface modification of carbon fiber through graphene oxide, aiming at solving the technical problems of large surface inertia, low surface energy and poor mechanical and thermal properties of carbon fiber at present. The method comprises the following steps: I, preparing graphene oxide through a modification Hummer's method; II, performing oxidation treatment on carbon fiber; III, performing surface modification amination treatment on the carbon fiber; and IV, grafting the surface of the carbon fiber with the graphene oxide. After the surface of the carbon fiber is grafted with the graphene oxide, the surface wettability and adhesiveness of the carbon fiber are improved remarkably, the roughness of the carbon fiber is enhanced greatly, the transfer effect between a base body and a reinforcement body in a composite material is strengthened, interface properties are improved, the material is prevented from being damaged, and the mechanical properties and thermal stability of the composite material are further improved. The method is applied to the field of surface modification of carbon fiber.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon fibers. Background technique [0002] Carbon fiber (CF for short) is a new type of fiber material with high strength and high modulus fibers with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and undergoing carbonization and graphitization. Carbon fiber has many excellent properties, such as high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environment, good fatigue resistance, specific heat and electrical conductivity between non-metal and Between metals, the thermal expansion coefficient is small and has anisotropy, good corrosion resistance, good X-ray transparency, etc. However, due to the large surface inertia of carbon fiber, low surface energy, lack ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C01B31/04D06M101/40
Inventor 安加东韩文波张幸红赵广东杜红菊程业红周善宝洪长青胡平
Owner HARBIN INST OF TECH
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