Poly(N,N-dimethylaminoethyl methacrylate)–poly(ethylene oxide) copolymer membranes for selective separation of CO2

✍ Scribed by Hong-Yong Zhao; Yi-Ming Cao; Xiao-Li Ding; Mei-Qing Zhou; Quan Yuan

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 907 KB
• Volume: 310
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2007.11.014

✦ Synopsis

A series of copolymers containing ether oxygen groups and amino groups were prepared based on N,N-dimethylaminoethyl methacrylate (DMEMA) and polyethylene glycol methyl ether methyl acrylate (PEGMEMA). The effect of PEGMEMA content in the copolymer on density, free volume, mechanical performance, and H 2 , CO 2 , N 2 and CH 4 gas transport properties of the copolymer was determined. Free volume was characterized using the polymer density and group contribution theory. The permeability of the copolymer to CO 2 is high, and both the CO 2 /N 2 and CO 2 /H 2 selectivities are high. For example, the permeability coefficient of PDMAEMA-PEGMEMA-90 ("90" represents the weight percent of PEGMEMA) to CO 2 is 112 Barrer and the CO 2 /N 2 and CO 2 /H 2 selectivity coefficients are 31 and 7, respectively. The effect of the temperature on gas transport properties was also determined. Finally, the potential application of the copolymer membranes for CO 2 /light gases separation was explored.