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

A method for functional graphene modification to improve the corrosion resistance of carbon fiber or carbon fiber composites

A graphene modification, composite material technology, applied in the field of modified carbon fiber or carbon fiber composite material, functional graphene modified carbon fiber or carbon fiber composite material, can solve the problems affecting the performance of proton exchange membrane fuel cell, PTFE It can solve problems such as peeling and corrosion, and achieve the effect of increasing contact, enhancing bonding force and improving electrical conductivity.

Active Publication Date: 2021-05-04
CENT SOUTH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main methods to improve the corrosion resistance of carbon fiber paper. The first one uses high-content polytetrafluoroethylene (PTFE) surface coating treatment, but the surface resistivity of carbon paper increases by orders of magnitude with the increase of PTFE content. , which in turn affects the performance of the proton exchange membrane fuel cell; at the same time, in the working state, the exposed matrix carbon will easily cause the PTFE to fall off due to corrosion.
On the other hand, it was proposed to use a high-pressure air pump to inhibit corrosion. Although this method can effectively discharge excess product water, some studies have shown that there are still serious corrosion phenomena in this device.

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
  • A method for functional graphene modification to improve the corrosion resistance of carbon fiber or carbon fiber composites
  • A method for functional graphene modification to improve the corrosion resistance of carbon fiber or carbon fiber composites
  • A method for functional graphene modification to improve the corrosion resistance of carbon fiber or carbon fiber composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] see figure 1 and figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 12.

[0066] (1) impregnated with phenolic resin

[0067] According to the thermogravimetric (TG) spectrum of the phenolic resin, calculate the carbon residue rate of the resin, and calculate the impregnation amount of the impregnation solution from the final density of the carbon fiber paper. According to the calculation results, use the phenolic resin impregnation solution to impregnate the carbon fiber paper, and air dry Afterwards, it is transferred to an oven, and placed at a constant temperature of 75-85° C. for 1-2.5 hours to obtain a dried carbon fiber paper.

[0068] (2) Molded

[0069] The molding process system is: when the mold temperature reaches 115-125°C, put the dried carbon fiber paper into it and set the pressure and temperature. Under the pressure of 1.5-2.5MPa, the mold temperature is 2.5-3.5°C / min The rat...

Embodiment 2

[0075] see figure 1 and figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 .

[0076] (1) Impregnation of functional graphene and resin impregnation solution

[0077] Prepare different ratios of functional graphene and resin impregnated mixed solutions, in which the solubility of functional graphene is 0.1%, and the mixed solution is ultrasonicated at 45KHz for about 6 hours, until the functional graphene is completely dissolved in the ethanol solution , impregnating the carbon fiber green body, air-dried, transferred to an oven, and placed at a constant temperature of 75-85° C. for one hour to obtain carbon fiber paper.

[0078] (2)(3)(4) as shown in Example 1.

Embodiment 3

[0080] see figure 1 and figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 .

[0081] (1) Impregnation of functional graphene and resin impregnation solution

[0082] Prepare different ratios of functional graphene and resin impregnated mixed solutions, in which the solubility of functional graphene is 0.5%, and the mixed solution is ultrasonicated at 45KHz for about 6 hours, until the functional graphene is completely dissolved in the ethanol solution , impregnating the carbon fiber green body, air-dried, transferred to an oven, and placed at a constant temperature of 75-85° C. for one hour to obtain carbon fiber paper.

[0083] (2)(3)(4) as shown in Example 1.

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
densityaaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for improving the corrosion resistance of carbon fiber or carbon fiber composite material through functional graphene modification. The introduction of functional graphene can improve the bonding performance between PTFE and carbon fiber or carbon fiber composite material, so that PTFE can form a more complete and strong hydrophobic anti-corrosion network structure on the surface of carbon fiber or carbon fiber composite material , to obtain strong hydrophobicity, strong corrosion resistance, and good durability of carbon fiber or carbon fiber composite material; especially this method can obtain hydrophobic carbon fiber carbon paper used in proton exchange membrane fuel cells, and improve its durability in harsh environments corrosion performance and durability, and the method is simple to operate and can realize mass production.

Description

technical field [0001] The invention relates to a functional graphene modified carbon fiber or carbon fiber composite material, in particular to a modified carbon fiber or carbon fiber composite material with strong corrosion resistance, in particular to a functional graphite with corrosion resistance The invention discloses a preparation method of carbon paper for proton exchange membrane fuel cells, which belongs to the technical field of proton exchange membrane fuel cell material preparation. Background technique [0002] The proton exchange membrane fuel cell is a kind of polymer film as the electrolyte, Pt / C or Pt-Ru / C as the electrocatalyst, and the reactant hydrogen and oxygen are sent to the catalyst layer through the bipolar plate with the gas flow channel, thereby A device that converts the chemical energy of reactants into electrical energy. Carbon fiber paper (carbon paper), as a one-dimensional carbon / carbon composite material, is widely used as the gas diffus...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1041H01M8/1067
CPCH01M8/1041H01M8/1067Y02E60/50Y02P70/50
Inventor 谢志勇粱伊丽杨飘飘王攀
Owner CENT SOUTH UNIV