Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N-dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution

doi:10.1002/macp.201300552

CORC > 化学研究所 > 中国科学院化学研究所

	Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N-dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution
	Dong, Zhixin; Mao, Jun; Wang, Dapeng; Yang, Muquan; Wang, Weicai; Bo, Shuqin; Ji, Xiangling
刊名	MACROMOLECULAR CHEMISTRY AND PHYSICS
	2014
卷号	215 期号:1 页码:111-120
关键词	Lower Critical Solution Temperature (Lcst) Dual-thermoresponsive Phase Behavior Surface-initiated Atom Transfer Radical Polymerization Upper Critical Solution Temperature (Ucst)
ISSN号	1022-1352
DOI	10.1002/macp.201300552
英文摘要	Novel thermoresponsive copolymers of zwitterionic sulfobetaine methacrylate (SBMA)- and N,N-dimethylaminoethyl methacrylate (DMAEMA)-grafted silica nanoparticles are prepared via surface-initiated atom transfer radical polymerization. The phase behavior of these nanoparticles is investigated. The hybrid nanoparticles exhibit tunable phase transition temperature between the upper critical solution temperature (UCST) and the lower critical solution temperature (LCST) in aqueous solution. A high PSBMA content in P(SBMA-co-DMAEMA) copolymer in the hybrid nanoparticles leads to aggregation at low temperatures because of dominant electrostatic interactions of ionic pairs, whereas a relatively low PSBMA content in the hybrid nanoparticles results in a phase transition at high temperatures as a result of predominant hydrophobic interactions of the PDMAEMA. Interestingly, hybrid nanoparticles with a suitable molar ratio of SBMA/DMAEMA exhibit both UCST and LCST in aqueous solution, where the water-insoluble microdomains of hybrid nanoparticles are generated by the PSBMA or PDMAEMA region depending on the temperature. The above dual-thermoresponsive phase transition is also controllable in salt solution. A facile change in the molar content of copolymer grafted on silica nanoparticles will tune the UCST and LCST readily.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000330592600013
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51177]
专题	中国科学院化学研究所
通讯作者	Ji, Xiangling
作者单位	Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Grad Sch, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Dong, Zhixin,Mao, Jun,Wang, Dapeng,et al. Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N-dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution[J]. MACROMOLECULAR CHEMISTRY AND PHYSICS,2014,215(1):111-120.
APA	Dong, Zhixin.,Mao, Jun.,Wang, Dapeng.,Yang, Muquan.,Wang, Weicai.,...&Ji, Xiangling.(2014).Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N-dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution.MACROMOLECULAR CHEMISTRY AND PHYSICS,215(1),111-120.
MLA	Dong, Zhixin,et al."Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N-dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution".MACROMOLECULAR CHEMISTRY AND PHYSICS 215.1(2014):111-120.