Chung Yuan Christian University

Chien-Chieh Hu

Juin-Yih Lai

Kueir-Rarn Lee

Jung-Tsai Chen

Ywu-Jang Fu

Kuo-Lun Tung

Shu-Hsien Huang

Wei-Song Hung

Quan-Fu An

Shingjiang Jessie Lue

Shen-Chuan Lo

Yue-Zhe Zhong

The invention provides a transparent gas barrier composite film and its preparation method. The transparent gas barrier composite film is formed by having polyvinyl alcohol, graphene oxide and a crosslinking agent undergo blending, crosslinking, film casting and isothermal crystallization processes where a weight ratio of graphene oxide to polyvinyl alcohol is 0.1 wt %, graphene oxide induces crystallization of polyvinyl alcohol to form a hybrid structure compose of polyvinyl alcohol crystals, graphene oxide and the crosslinking agent, crystallinity of polyvinyl alcohol is more than 30%, transmittance of the composite film is more than 85%, and the oxygen transmission rate of the composite film is less than 0.005 cc/m/day.

Transparent gas barrier composite film and its preparation method

The present invention discloses a semicrystalline polymer/graphene oxide composite film, comprising: a first semicrystalline-typed polymer, distributed in structural space of the composite film and having a porous structure; and graphene oxide, having a layered structure and distributed in the composite film wherein gas passage exist between adjacent layered structures, the first semicrystalline-typed polymer existing between part of adjacent layered structures forms into a second semicrystalline-typed polymer by further heat treatment after the first semicrystalline-typed polymer and graphene oxide are blended uniformly to be distributed in the composite film so as to fill and seal a portion of the porous structure to block gas from flowing to extend path length(s) of gas passage; wherein graphene oxide existing between the first semicrystalline-typed polymers induces formation of the second semicrystalline-typed polymer.

Method for fabricating a semicrystalline polymer / graphene oxide composite film

Semicrystalline polymer/graphene oxide composite film and method for fabricating the same

The present invention discloses a silica-like membrane for separating gas, which is modified from poly(dimethylsiloxane) (PDMS) membrane by an atmospheric pressure high temperature plasma torch (APHTPT). Furthermore, the present invention of the separating gas silica-like membrane with an inorganic/organic interface structure which has both the gas flux of the organic membrane and also the gas selectivity of the inorganic membrane.

Silica-like membrane for separating gas and the method for forming the same

Growing community of inventors

Taoyuan County, Taiwan

Chien-Chieh Hu