Smart zwitterionic membranes with on/off behavior for protein transport

被引：25
|
作者：
Su, Yanlei [1 ]
Zheng, Lili [1 ]
Li, Chao [1 ]
Jiang, Zhongyi [1 ]
机构：
[1] Tianjin Univ, Minist Educ, Sch Chem Engn & Technol, Key Lab Green Technol, Tianjin 300072, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2008年 / 112卷 / 38期
基金：
国家教育部博士点专项基金资助;
关键词：
D O I：
10.1021/jp804422t
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Poly(acrylonitrile) (PAN)-based zwitterionic membranes, composed of PAN and poly(N,N-dimethyl-N-methacryloxyethyl-N-(3-sulfopropyl) copolymer, are electrolyte-sensitive smart membranes. The hydrophilicity was increased and protein adsorption was remarkably decreased for the membranes in response to environmental stimuli. FTIR spectroscopic analysis directly provided molecular-level observation of the enhanced dissociation and hydration of zwitterionic sulfobetaine dipoles at higher electrolyte concentrations. The smart PAN-based zwitterionic membranes can close or open channels for protein transport under different NaCl concentrations. The electrolyte-sensitive switch of on/off behavior for protein transport is reversible.
引用
收藏
页码：11923 / 11928
页数：6
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