A novel multi-responsive polyampholyte composite hydrogel with excellent mechanical strength and rapid shrinking rate

	A novel multi-responsive polyampholyte composite hydrogel with excellent mechanical strength and rapid shrinking rate
	Xu K ; Tan Y ; Chen Q ; An HY ; Li WB ; Dong LS ; Wang PX
刊名	journal of colloid and interface science
	2010
卷号	345 期号:2 页码:360-368
关键词	DOUBLE-NETWORK HYDROGELS VOLUME PHASE-TRANSITION NANOCOMPOSITE HYDROGELS POLY(N-ISOPROPYLACRYLAMIDE) HYDROGELS SWELLING EQUILIBRIA PNIPAAM HYDROGELS TEMPERATURE KINETICS GELS PARTICLES
ISSN号	0021-9797
通讯作者	wang px
中文摘要	series of hydrophilic core-shell microgels with cross-linked poly(n-isopropylacrylamide) (pnipaam) as core and poly(vinyl amine) (pvam) as shell are synthesized via surfactant-free emulsion polymerization. then, the microgels are treated with a small amount of potassium persulfate (kps) to generate free radicals on the amine nitrogens of pvam, which subsequently initiate the graft copolymerization of acrylic acid (aa), acryloyloxyethyl trimethyl ammonium chloride (dac), and acrylamide (aam) onto microgels to prepare multi-responsive composite hydrogels. the composite hydrogels consist of cross-linked ungrafted polyampholyte chains as the first network and microgels with grafted polyampholyte chains as graft point and second network and show surprising mechanical strength and rapid response rate. the investigation shows the compress strength of composite hydrogels is up to 17-30 mpa, which is 60-100 times higher than that of the hydrogel matrix. the composite hydrogel shows reversible switch of transmittance when traveling the lowest critical temperature (lcst) of microgels. when the composite hydrogel swollen in ph 2.86 solution at ambient condition is immersed into the ph 7.00 solution at 45 degrees c, a rapid dynamic shrinking can be observed. and the character time (tau) of shrinking dynamic of composite hydrogel is 251.9 min, which is less than that of hydrogel matrix (tau = 2273.7 min). (c) 2010 elsevier inc. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000276729200034
公开日期	2012-06-06
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/43787]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Xu K,Tan Y,Chen Q,et al. A novel multi-responsive polyampholyte composite hydrogel with excellent mechanical strength and rapid shrinking rate[J]. journal of colloid and interface science,2010,345(2):360-368.
APA	Xu K.,Tan Y.,Chen Q.,An HY.,Li WB.,...&Wang PX.(2010).A novel multi-responsive polyampholyte composite hydrogel with excellent mechanical strength and rapid shrinking rate.journal of colloid and interface science,345(2),360-368.
MLA	Xu K,et al."A novel multi-responsive polyampholyte composite hydrogel with excellent mechanical strength and rapid shrinking rate".journal of colloid and interface science 345.2(2010):360-368.