Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid   Crystalline Triblock Copolymer in Ionic Liquid

doi:10.1021/acs.macromol.5b01103

CORC > 北京大学 > 化学与分子工程学院

	Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid
	Zhang, Yu-Dong ; Fan, Xing-He ; Shen, Zhihao ; Zhou, Qi-Feng
刊名	MACROMOLECULES
	2015
关键词	VISCOELASTIC PROPERTIES BLOCK-COPOLYMERS CROSS-LINKING POLYMER ELECTROLYTES GELATION CONDUCTIVITY BEHAVIOR
DOI	10.1021/acs.macromol.5b01103
英文摘要	Ion gels with tunable storage moduli are prepared through the self-assembly of ail ABA triblock copolymer AOA-12 comprised of a thermotropic liquid crystalline (LC) polymer as the end-block A and poly(ethylene oxide) (PEO) as the mid-block B in,a. room-temperature ionic liquid (IL), 1-ethyl-3-methylimidazolium bis(trifluoromethylsufonyl)imide ([EMIM][TFSI]). The PEO mid-block is well-solvated by this ionic liquid, whereas the LC polymer end-blocks aggregate and serve as the physical cross-linkers. For comparison; a triblock copolymer AOA-0 containing a non-LC side-chain polymer with the same mesogen is also synthesized, and its corresponding ion gel is prepared. The ion gels with relatively high,concentrations of the LC triblock copolymer have hierarchical structures with different microphase-separated nanostructures and the LC arrangement of the LC blocks. By incorporating the azobenzene mesogen in the side chains, transparent AOA-n/[EMIM] [TFSI] (where n is the number of carbon atoms in the spacer between the azobenzene mesogen and the polymethacrylate backbone, and n 0, 12), ion gels are obtained with concentrations of the polymer as low as around 2 wt %. The ion gel obtained has a storage modulus as high as, similar to 10 kPa, while its conductivity is close to that of the pure IL mainly because of the high IL concentration of the ion gel. Furthermore, the storage modulus of the AOA-12/IL ion gel can be tuned by temperature because of the thermotropic phase. behavior of the LC block. These ion gels are,potentially useful as high-temperature ionic membranes or thermal-responsive soft actuators.; Beijing Natural Science Foundation [2142016]; SCI(E); ARTICLE; zshen@pku.edu.cn; 14; 4927-4935; 48
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/418074]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Yu-Dong,Fan, Xing-He,Shen, Zhihao,et al. Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid[J]. MACROMOLECULES,2015.
APA	Zhang, Yu-Dong,Fan, Xing-He,Shen, Zhihao,&Zhou, Qi-Feng.(2015).Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid.MACROMOLECULES.
MLA	Zhang, Yu-Dong,et al."Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid".MACROMOLECULES (2015).