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Method for grafting hyperbranched polyglycerol on carbon fiber surface based on plasma technology

A technology of surface grafting and carbon fiber, which is applied in the direction of carbon fiber, fiber treatment, ultrasonic/sonic fiber treatment, etc., can solve the problems of low resin bonding strength and insufficient surface active groups, and achieve the effect of increasing the probability of grafting

Inactive Publication Date: 2019-03-15
SHENZHEN FUHENG PLASTICS PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem of insufficient surface active groups and low bonding strength with resin in the current carbon fiber surface modification method

Method used

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  • Method for grafting hyperbranched polyglycerol on carbon fiber surface based on plasma technology
  • Method for grafting hyperbranched polyglycerol on carbon fiber surface based on plasma technology
  • Method for grafting hyperbranched polyglycerol on carbon fiber surface based on plasma technology

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specific Embodiment approach 1

[0024] The method for grafting hyperbranched polyglycerol on the carbon fiber surface of this embodiment based on plasma technology is carried out in the following steps:

[0025] Step 1: Removal of epoxy coating on carbon fiber surface

[0026] Put the carbon fiber bundles into a Soxhlet extractor, use acetone as a solvent, and heat at 75°C-85°C, so that the acetone is continuously evaporated and condensed in the Soxhlet extractor, so that the impurities on the surface of the carbon fibers are continuously cleaned in the distilled acetone. The time is 30h-40h; then take out the carbon fiber and dry it in an oven at 80°C-90°C for 4h-6h.

[0027] Step 2: Preparation of plasma-activated carbon fibers

[0028] Put the carbon fiber in the plasma reaction chamber, first pass high-purity argon with a flow rate of 1.5L / min-2L / min for 5min-8min; then pass through pure oxygen with a flow rate of 10mL / min-15mL / min for 5min -8min; Discharge treatment at a power of 60W-80W for 80s-100s ...

specific Embodiment approach 2

[0035] The difference between this embodiment and specific embodiment 1 is that the high-purity argon gas flow introduced in step 2 is 1.5L / min-1.8L / min, and the feeding time is 5min-6min. Others are the same as specific embodiment 1.

specific Embodiment approach 3

[0036] The difference between this embodiment and specific embodiment 1 and specific embodiment 2 is: the flow rate of high-purity oxygen introduced in step 2 is 10mL / min-12mL / min, and the feeding time is 6min-8min. Others are the same as in specific embodiment 1 or Method 2 is the same.

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Abstract

The invention provides a method for grafting hyperbranched polyglycerol on the carbon fiber surface based on a plasma technology. The method is characterized by comprising the following steps: step 1,removal of an epoxy coating on the carbon fiber surface; step 2, preparation of plasma activated carbon fibers; step 3, preparation of a hyperbranched polyglycerol N,N-dimethyl formamide solution; step 4, ultrasonic infiltration of the activated carbon fibers; step 5, grafting and purification of the activated carbon fibers. The method provided by the invention has the benefits that the surface depth of each of the carbon fibers treated by adopting the plasma technology is not more than 100 mu m, so that the strength of each of carbon fiber bodies cannot be damaged; with the adoption of an ultrasonic infiltration treatment method, the activated carbon fiber bundles which are mechanically meshed with one another due to rough surfaces can be separated from one another and are uniformly dispersed in an organic solvent, so that the grafting probability of carbon fiber surface active groups with the hyperbranched polyglycerol is improved.

Description

[technical field] [0001] The invention relates to the field of carbon fiber surface modification, in particular to a method for grafting hyperbranched polyglycerol on the surface of carbon fiber based on plasma technology. [Background technique] [0002] As a new type of inorganic material, carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and fatigue resistance. It is widely used as a typical high-performance fiber in the reinforcement of advanced composite materials. However, the carbon fiber without surface treatment has low surface energy, few active functional groups, and the surface is chemically inert, resulting in poor bonding with the resin matrix. Therefore, the surface treatment of carbon fibers and the introduction of active groups on the surface of carbon fibers can improve the interfacial bonding quality of carbon fibers and composite materials. [0003] P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/53D06M10/02D06M101/40
CPCD06M10/02D06M10/025D06M15/53D06M2101/40
Inventor 李建敏刘明张俊张峰
Owner SHENZHEN FUHENG PLASTICS PIGMENT
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