QQ客服 官方微博 反馈留言

	Diffusion of single polyelectrolytes on the surface of poly (n-isopropylacrylamide) brushes
	Wang, Wei1,2; Zhang, Cunfu1,2; Wang, Shengqin1,2; Zhao, Jiang1
刊名	Macromolecules
	2007-12-25
卷号	40期号:26页码:9564-9569
ISSN号	0024-9297
DOI	10.1021/ma0710535
通讯作者	Zhao, jiang(jzhao@iccas.ac.cn)
英文摘要	Lateral diffusion of a single polyelectrolyte probe, poly(2-vinylpyridine) (p2vp), on the surface of thermoresponsive poly(n-isopropylacrylamide) (pnipam) brushes was studied by fluorescence correlation spectroscopy. measurements were conducted at a condition of a low ph value and a low salt concentration., under which the p2vp chain is fully charged and at its extended coil conformation. the temperature dependence of the surface diffusion coefficient (d-s) of p2vp was studied at varying pnipam thickness, in which d, increased with the elevation of temperature and reached a maximum value around 32-35 degrees c before it dropped at further increased temperature. the experimental results indicate a linear dependence of the friction force experienced by the probe on the brush thickness. the thermovariation of d, demonstrates the decrease of the surface friction force at temperature lower than 32-35 degrees c due to the decrease of the solvent viscosity and a sharp increase after the lcst transition because of the change of the pniapm chain rigidity.
WOS关键词	FLUORESCENCE CORRELATION SPECTROSCOPY ; POLY(N-ISOPROPYLACRYLAMIDE) BRUSHES ; INITIATED POLYMERIZATION ; FRICTION ; SYSTEM ; FORCES ; CHAINS ; FLUIDS ; LAYERS ; SHEAR
WOS研究方向	Polymer Science
WOS类目	Polymer Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000251724700051
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2382900
专题	中国科学院大学
通讯作者	Zhao, Jiang
作者单位	1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Mat & Sci,Beijing Natl Lab Mol, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wei,Zhang, Cunfu,Wang, Shengqin,et al. Diffusion of single polyelectrolytes on the surface of poly (n-isopropylacrylamide) brushes[J]. Macromolecules,2007,40(26):9564-9569.
APA	Wang, Wei,Zhang, Cunfu,Wang, Shengqin,&Zhao, Jiang.(2007).Diffusion of single polyelectrolytes on the surface of poly (n-isopropylacrylamide) brushes.Macromolecules,40(26),9564-9569.
MLA	Wang, Wei,et al."Diffusion of single polyelectrolytes on the surface of poly (n-isopropylacrylamide) brushes".Macromolecules 40.26(2007):9564-9569.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。