Dimensionally stable, leak-free graphite substrate

摘要

A method for preparing resin-impregnated graphite articles, including providing a sheet of compressed particles of exfoliated graphite having two major surfaces; impregnating the sheet with a first resin system to form a resin-impregnated sheet; surface treating the resin-impregnated sheet to form at least one structure on at least one of the major surfaces of the sheet to form a surface treated sheet; and treating the sheet with a second resin system.

主权项

1. A dimensionally stable, leak-free fluid flow plate for an electrochemical fuel cell, comprising a sheet of compressed particles of exfoliated graphite having two major surfaces, at least one of the major surfaces having at least one groove or channel formed thereon, the sheet having a first resin system and a second resin system incorporated thereinto, wherein the first resin system comprises a polybenzoxazine resin and the second resin system comprises a methacrylate resin, further wherein the first resin system impregnated into the sheet at a level of about 5% to about 35% by weight and the second resin system applied to the surface of the sheet at a level of about 0.05% and about 10% by weight.