Patent ID: 9656214
Date: 2017-05-23
CPC Classifications: B01D,B32B

Claim:
1. A method to prepare a composite membrane, the method comprising: contacting a first surface of a porous graphene layer to a growth substrate; contacting a second surface of the porous graphene layer to a first surface of a fibrous porous support substrate, wherein the fibrous porous support substrate is comprised of woven or non-woven fibrous material; removing the porous graphene layer with the fibrous porous support substrate from the growth substrate; contacting a surface of the fibrous porous support substrate to a porous metal support, wherein the porous metal support includes one or more of a metal grid and a spiral bound mesh; and heating the porous graphene layer and the fibrous porous support substrate to form the composite membrane using a pressurized thermoforming process, wherein the pressurized thermoforming process includes a hot calendaring process.