Conductance compound material and preparing process

Abstract

The present invention relates to a conductive composite material and a manufacture art thereof, in particular to a mixed epoxy resin and phenolic resin / graphite matrix conductive composite material and a manufacture art thereof. The mass ratio of the material formula is as follows: graphite material of 70 to 90 percent; epoxy resin of 0 to 24 percent; phenolic resin of 30 to 2 percent. The manufacture art is as follows: (1) preparing the epoxy resin, the phenolic resin and the graphite according to the mass percent; (2) mixing and grinding the epoxy resin, the phenolic resin and the graphite to obtain refined and even mixed powder, the granularity is between 100 meshes and 180 meshes; (3) packing the mixed powder into a pressing molding mold; heat-pressing and sintering to mold; the molding temperature is from 180 to 310 DEG C; the molding pressure is from 10 to 40 MPa; and the temperature pressure keeping time is from 30 to 120 min. The material is mainly used for producing bipolar plates of proton exchange membrane fuel cells and other electrodes. In the condition that the conductivity rate and corrosion resistant capacity are ensured, the conductive composite material has comparatively high strength and density. The manufacture art of the conductive composite material is simple, energy-saving, environmentally friendly, low in cost and wide in application range.

Description

1. Technical field: [0001] The invention belongs to the field of conductive composite materials and preparation techniques thereof, in particular to epoxy and phenolic mixed resin / graphite-based conductive composite materials and the preparation techniques thereof. 2. Background technology: [0002] Conductive composite materials are widely used in products such as brushes, electrodes, and fuel cell bipolar plates due to their good electrical conductivity, corrosion resistance, and high strength. Proton exchange membrane fuel cell is a relatively mature fuel cell that utilizes the reaction of hydrogen and oxygen to release electric energy. In 1997, my country listed "fuel cell technology" as one of the national "Ninth Five-Year Plan" major scientific and technological projects, among which proton exchange membrane fuel cell is the main scientific research project, and is considered to be the first choice for clean and efficient power generation devices in the 21st century. ...

AI Technical Summary

Problems solved by technology

The thermoplastic resin composite material is relatively brittle, and the bipolar plate produced needs a large thickness to ensure the mechanical properties. This will increase the quality of the bipolar plate, increase the cost, and is not conducive to the installation of the later bipolar plate, reducing the volume of the fuel cell. Increase; and thermosetting resin composite materials, now generally use viscous resin wet method to grind and mix, need to add solvent during the mixing process, high temperature carbonization after molding, the process is more complicated, resulting in increased manufacturing costs