Unlock instant, AI-driven research and patent intelligence for your innovation.

Carbon fiber surface interface modification method and modified carbon fiber thereof

A technology for modifying carbon and carbon fiber, which is applied in the field of carbon fiber surface and interface modification and modified carbon fiber, which can solve the problems of carbon fiber structure damage, affecting carbon fiber performance, and complex process

Active Publication Date: 2022-01-28
SICHUAN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the perfect and regular graphite structure on the surface of high modulus carbon fiber, it is chemically inert, so it is difficult to modify the surface of the carbon fiber without chemical oxidation or other damage to the chemical structure and strength of the fiber body. Commonly used such as Methods such as surface plasma treatment and chemical grafting are not only complicated in process, but also cause certain damage to the carbon fiber structure, affect the performance of the carbon fiber itself, and lead to poor interfacial enhancement; for example, Liu Yuxin et al. (cold plasma grafting treatment on The effect of carbon fiber fabric / epoxy composite interface properties [J]. Journal of Aeronautical Materials, 2003 (04): 40-43.) The carbon fiber fabric was treated with plasma grafting with maleic anhydride, and it was found that after grafting treatment, it was more Pure plasma treatment is better, but the shear performance is only improved by 21% after treatment and compounded with epoxy composites

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon fiber surface interface modification method and modified carbon fiber thereof
  • Carbon fiber surface interface modification method and modified carbon fiber thereof
  • Carbon fiber surface interface modification method and modified carbon fiber thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1, P3HT-PCL self-assembled modified M40J carbon fiber

[0048] Put the M40J carbon fiber into 1.3mg / mL THF solution in which P3HT-PCL was dissolved, then slowly add acetone to the system, so that the mass volume ratio of carbon fiber, THF and acetone in the system is 1mg: 1mL: 1mL. Due to the difference in density, acetone will float on the THF phase and separate the liquid. With the gradual diffusion of acetone into the THF phase, the change of solubility will cause P3HT-PCL to gradually crystallize and precipitate into the THF phase from the interface of the two solvents. When the acetone diffused to the vicinity of the carbon fiber, the P3HT-PCL nanowires enriched and grew on the surface of the carbon fiber. After 36 hours, the carbon fiber CF-TC-1.3 modified by the P3HT-PCL self-assembled nanowire was obtained by taking it out and evaporating the solvent.

Embodiment 2

[0049] Example 2, P3HT-PCL self-assembled modified M40J carbon fiber

[0050] Put the M40J carbon fiber into 0.7mg / mL THF solution in which P3HT-PCL is dissolved, then slowly add acetone to the system, so that the mass volume ratio of carbon fiber, THF and acetone in the system is 1mg: 1mL: 1mL. Due to the difference in density, acetone will float on the THF phase and separate the liquid. With the gradual diffusion of acetone into the THF phase, the change of solubility will cause P3HT-PCL to gradually crystallize and precipitate into the THF phase from the interface of the two solvents. When the acetone diffused to the vicinity of the carbon fiber, the P3HT-PCL nanowires enriched and grew on the surface of the carbon fiber. After 72 hours, the carbon fiber CF-TC-0.7 modified by the P3HT-PCL self-assembled nanowire was obtained by taking it out and evaporating the solvent.

Embodiment 3

[0051] Example 3, P3HT-PCL self-assembled modified M40J carbon fiber

[0052] Put the M40J carbon fiber into 2.0mg / mL THF solution in which P3HT-PCL is dissolved, then slowly add acetone to the system, so that the mass-volume ratio of carbon fiber, THF and acetone in the system is 1mg: 1mL: 1mL density difference, acetone will The liquid was separated by floating on the THF phase. With the gradual diffusion of acetone into the THF phase, the change of solubility will cause P3HT-PCL to gradually crystallize and precipitate into the THF phase from the interface of the two solvents. When acetone diffused to the vicinity of the carbon fiber, the P3HT-PCL nanowires enriched and grew on the surface of the carbon fiber. After 24 hours, the carbon fiber CF-TC-2.0 modified by the P3HT-PCL self-assembled nanowire was obtained after taking out and evaporating the solvent.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Roughnessaaaaaaaaaa
Login to View More

Abstract

The invention provides a carbon fiber composite material surface interface modification method. According to the method, in-situ self-assembly of a block copolymer on the surface of carbon fiber is carried out to form an ordered nanostructure, so that surface lossless modification of the carbon fiber is realized. The functional characteristic combination of each molecular chain segment of the block polymer is designed, and the molecular chain segment capable of being conjugated and enhanced with the surface of the carbon fiber and the molecular chain segment compatible with matrix resin are combined to form the specific block polymer, so that the interface bonding of the composite material is remarkably improved, and the physical and mechanical properties of the composite material are improved; the method can be applied to preparation of high-performance composite materials in the fields of aerospace, rail transit, automobiles, energy, ships and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a method for modifying the surface and interface of carbon fibers and modified carbon fibers thereof. Background technique [0002] Carbon fiber is a fibrous carbon compound formed by carbonizing organic fibers at high temperature in an inert atmosphere. The carbon content is as high as 90%, and it has high specific strength and high modulus. It is widely used as a reinforcing material for composite materials. In addition to excellent mechanical properties, carbon fiber also has the advantages of low density, high temperature resistance, corrosion resistance, friction resistance, fatigue resistance, high electrical and thermal conductivity, electromagnetic shielding, and the softness and processability of textile fibers. As a reinforcing material for advanced composite materials, it has a very wide range of applications in military and civilian industries. [0003]...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D06M15/507C08J5/06C08K9/08C08K7/06C08L63/00D06M101/40
CPCD06M15/507C08J5/06D06M2101/40C08K9/08C08K7/06C08J2363/00
Inventor 邹华维张涵衡正光张浩若张雪琴
Owner SICHUAN UNIV