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题名: Huge Differences in the Kinetics of Swelling Enhancement and De-enhancement of Permanently Charged Polyelectrolyte Brushes
作者: Chu, Xiao1; Yang, Jingfa1; Zhao, Jiang1
关键词: counterions ; kinetics ; polyelectrolyte brushes ; polymers ; swelling
刊名: CHEMISTRY-AN ASIAN JOURNAL
发表日期: 2016-10-01
卷: 11, 期:19, 页:2802-2807
收录类别: SCI
英文摘要: As demonstrated previously (X. Chu et al., Soft Matter 2014, 10, 5568), permanently charged polyelectrolyte brushes can experience an enhancement of swelling by exposure to an external monovalent salt solution in moderate concentrations. Beyond the previous static measurements, the kinetics of the swelling enhancement and de-enhancement were investigated in the current study by using a quartz crystal microbalance with dissipation (QCM-D). By developing an effective approach to quantify the response in QCM-D, a vast difference in swelling enhancement and de-enhancement of a model permanently charged polyelectrolyte brush (sodium polystyrene sulfonate, NaPSS) was discovered. The results indicate new physics of the charged brushes: the difference in the attachment and detachment of counterions to the polyelectrolyte chains.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35129
Appears in Collections:高分子物理与化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, 2 North First St Zhongguancun, Beijing 100190, Peoples R China
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