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Carbon/resin composite material and its application

A technology of resin composite materials and carbon materials, which is applied in the fields of composite materials including graphite, carbon black and resin, and expanded graphite, can solve the problems of long processing cycle, poor product performance by injection molding, and high requirements for molding pressure, and achieves high raw material prices. Inexpensive and short preparation cycle

Active Publication Date: 2015-11-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The biggest problem is: the traditional molding method has a long processing cycle, and the performance of injection molding products is poor. Currently, the commonly used processing methods are not suitable for large-scale production
The main defect of this process is that the carbon nanotube treatment process is relatively complicated, and it needs to be treated under ferrous ions, hydrogen peroxide, fixed pH value and specific wavelength ultraviolet light for 1 hour to 5 hours, and the molding pressure is high (requires 10MPa ~ 40MPa), Long process cycle (holding time 40min~120min), not suitable for large-scale production

Method used

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  • Carbon/resin composite material and its application
  • Carbon/resin composite material and its application
  • Carbon/resin composite material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Two kinds of natural graphites with a particle size of 75 μm (200 mesh) and 150 μm (100 mesh) are mixed with expanded graphite, carbon black and phenolic resin, and their mass percentages are respectively: 26wt%, 26wt%, 8wt%, 20wt% and 20wt%, room temperature (20 ℃ ~ 25 ℃) mixing and ball milling for 2 hours to get the mixture, the resulting mixture is placed in a flat mold, at 5MPa (molding preheating pressure), 170 ℃ (molding temperature) conditions for 1 minute (molding preheating temperature) Heat time) after pressurized forming, then increase the pressure to 10MPa (molding pre-curing pressure), and keep it in this state for 3 minutes (molding pre-curing time) to implement pressurized pre-curing, cooling, and demoulding (the release agent is Silicone oil) to prepare the pre-finished product; keep the pre-finished product at normal pressure 150°C (normal pressure curing temperature) for 3 hours (normal pressure curing time) to implement normal pressure and high temper...

Embodiment 2

[0058] Except that the molding temperature in Example 1 was changed to 160° C., other conditions were the same as in Example 1 to obtain a composite material B.

Embodiment 3

[0060] Except that the molding preheating pressure in Example 1 was changed to 1 MPa, other conditions were the same as in Example 1 to obtain a composite material C.

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Abstract

The invention relates to a carbon / resin composite material and application thereof. The carbon / resin composite material is manufactured by that a pre-finished product is manufactured through pressurization and solidification, and then the pre-finished product is solidified through constant pressure and high temperature to obtain the carbon / resin composite material. The total weight of used raw materials is used as 100wt% calculation reference, a carbon material occupies 70wt%-90wt%, and the carbon material is a mixture formed by natural graphite, expanded graphite and carbon black. The carbon / resin composite material can be used as bipolar plates of a proton exchange membrane fuel cell. The carbon / resin composite material overcomes the defect that a traditional mould pressing method is long in processing cycle and an injection molding method is poor in product performance and is particularly suitable for large-scale production.

Description

technical field [0001] The invention relates to a carbon / resin composite material and its application, in particular to a composite material containing graphite, expanded graphite, carbon black and resin and its application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the characteristics of high energy conversion efficiency, no pollution, rapid start-up at room temperature, long life and high power density. It has broad applications in fixed power stations, electric vehicles, military special power supplies, and mobile power supplies. It has application prospects, especially the driving power of electric vehicles, and is considered to be the third generation power system after the steam engine and internal combustion engine. Its research has become a hotspot in the fields of electrochemistry and energy science. Many developed countries and companies have attached great importance to its development and invested heavily in the development of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/96
CPCY02E60/50
Inventor 吴国章张昆江建第
Owner EAST CHINA UNIV OF SCI & TECH