Industry-university Cooperation Foundation Hanyang University

Byung Min Yoo

Ho Bum Park

Hyo Won Kim

Hee Wook Yoon

Younghoon Cho

Byungkook Ahn

Yoon Sung Hwang

Myung Jin Yoo

The present invention relates to a composite film comprising a graphene oxide coating layer, a porous polymer support comprising the same, and a method for preparing the same. More particularly, the present invention relates to a composite film comprising a graphene oxide coating layer with improved permeability and stability, a porous polymer support for a composite film comprising a graphene oxide coating layer with improved permeability, and a method for preparing the same.

Composite film including a graphene oxide coating layer, a porous polymer support including the same and a method for preparing the same

The present invention relates to a composite separation membrane including a graphene oxide coating layer. The composite separation membrane of the present invention has both high carbon dioxide permeability and high selectivity for carbon dioxide over nitrogen, hydrogen or methane gas, is free of surface defects, and exhibits remarkably increased selectivity for carbon dioxide over other gases (hydrogen, nitrogen, methane, etc.) without any change in carbon dioxide permeability, particularly even when exposed to water. Due to these advantages, the composite separation membrane of the present invention can be applied to industrial fields involving carbon dioxide separation and recovery processes. The present invention also relates to a method for manufacturing the composite separation membrane.

Composite separation membrane including graphene oxide coating layer and method for manufacturing the same

The present invention relates to a technology for manufacturing a nanocomposite membrane comprising a graphene oxide coating layer with a thickness of 1 nm to 50 nm, which is formed on various supports and has nanopores, and a reduced graphene oxide nanocomposite membrane, and applying the membranes to gas separation. The graphene oxide nanocomposite membrane for gas separation of the present invention has excellent gas permeability and selectivity at the same time, and especially, excellent hydrogen gas permeability and hydrogen gas selectivity compared with carbon dioxide, and the reduced graphene oxide nanocomposite membrane has remarkably enhanced hydrogen gas permeability and hydrogen gas selectivity compared with carbon dioxide, and thus the membranes are applicable as a gas separation membrane in an industrial field involving a hydrogen separation process. Furthermore, a graphene oxide nanocomposite membrane for gas separation can be provided, in which strong binding force between a support and a graphene oxide coating layer is induced by modifying surfaces of various supports and thus the graphene oxide coating layer is not easily delaminated.

Graphene oxide nanocomposite membrane for gas separation, reduced graphene oxide nanocomposite membrane and method for manufacturing the same

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Seoul, South Korea

Byung Min Yoo