The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2017
Filed:
Oct. 07, 2014
Chung Yuan Christian University, Tao-Yuan, TW;
Jung-Tsai Chen, Taoyuan County, TW;
Chien-Chieh Hu, Taoyuan County, TW;
Kueir-Rarn Lee, Taoyuan County, TW;
Juin-Yih Lai, Taoyuan County, TW;
Ywu-Jang Fu, Taoyuan County, TW;
Quan-Fu An, Taoyuan County, TW;
Shen-Chuan Lo, Taoyuan County, TW;
Yue-Zhe Zhong, Taoyuan County, TW;
CHUNG YUAN CHRISTIAN UNIVERSITY, Tao-Yuan, TW;
Abstract
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.