writer：Shuai Quan, a Songwei Li, a Zhenxing Wang, a Xingru Yan, b Zhanhu Guo* b and Lu Shao
keywords：Gas separation, membrane
source：期刊
Issue time：2015年

For thefirst time, the exciting reaction between the bio-inspired dopamine and the epoxy functional

poly(ethylene oxide) (PEO) at elevated temperatures was found and utilized for fabricating dopamine/

poly(ethylene oxide) (PEO) network membranes for sustainable gas separation. The gas transport

properties of the synthesized novel membrane were investigated aiming at energy (H2) purification and

CO2capture. The membrane was confirmed to be CO2selective and exhibited relatively high selectivity

especially for CO2/N2 separation. Importantly, the flexible incorporation of low-molecular-weight

poly(ethylene glycol) dimethyl ether (PEGDME) into the swollen network membrane greatly improved the

gas transport performance and the CO2 permeability was increased by 550%. Furthermore, the

temperature and upstream pressure dependence of our developed membranes have been examined in

detail. Surprisingly, the plasticization phenomena in the membranes at higher upstream pressure can be

harnessed to enhance the gas transport performance by increasing both the CO2permeability and the

CO2/other tested gas selectivity mainly due to the network structure and CO2-philic character. This

report will expedite the rapid discovery of new materials derived from bio-inspired dopamine for possibly

solving energy and environmental issues.