Effect of Ionic Liquid on Mechanical Properties and Morphology of Zwitterionic Copolymer Membranes

被引：58

作者：

Brown, Rebecca H. ^{[1
]}

Duncan, Andrew J. ^{[1
,2
]}

Choi, Jae-Hong ^{[3
]}

Park, Jong Keun ^{[1
]}

Wu, Tianyu ^{[1
]}

Leo, Donald J. ^{[2
]}

Winey, Karen I. ^{[3
]}

Moore, Robert B. ^{[1
]}

Long, Timothy E. ^{[1
]}

机构：

[1] Virginia Tech, Dept Chem, Blacksburg, VA 24061 USA

[2] Virginia Tech, Dept Mech Engn CIMSS, Blacksburg, VA 24061 USA

[3] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

MACROMOLECULES | 2010年 / 43卷 / 02期

关键词：

N-BUTYL ACRYLATE; (SULFOPROPYL)AMMONIUM BETAINE COPOLYMERS; X-RAY-SCATTERING; 2-ETHOXYETHYL ACRYLATE; RANDOM IONOMERS; BULK PROPERTIES; POLYMERS; ELECTROLYTES; METHACRYLATE; ACTUATOR;

D O I：

10.1021/ma902028u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Zwitterionomers containing less than 13 mol % zwitterion functionality were synthesized using free radical copolymerization of n-butyl acrylate (nBA) and sulfobetaine monomers. X-ray scattering results revealed it two-phase morphology, which is typical of random ionomers with an ionomer peak at q similar to 1.5 nm(-1). Swelling studies in the ionic liquid (IL), 1-ethyl-3-methylimidazolium ethylsulfate (EMIm ES), showed an influence of zwitterionic structure on IL uptake. Zwitterionomer membranes were swollen to various IL contents, and the influence of IL on mechanical properties, morphology, and ionic conductivity was explored through dynamic mechanical analysis (DMA), X-ray scattering, and impedance spectroscopy, respectively. Results revealed that IL preferentially swelled the zwitterionic domains but wits excluded from the matrix phase. Significant changes in mechanical properties and ionic conductivity were observed above a critical uptake of IL. Fundamental explorations of the interaction of ILs with sulfobetaine-containing copolymers may lead to the use of zwitterionomers in emerging membrane applications.

引用

页码：790 / 796

页数：7

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