期刊
POLYMER INTERNATIONAL
卷 64, 期 8, 页码 999-1005出版社
WILEY-BLACKWELL
DOI: 10.1002/pi.4907
关键词
polyzwitterions; fluorescence correlation spectroscopy; anti-polyelectrolyte effect; conformation
资金
- National Natural Science Foundation of China
A study was made of the anti-polyelectrolyte effect of a model polyzwitterion at the single-chain level and from the point of view of comparison with inorganic salts and organic inner salts. A well-defined polymer of sulfobetaine was synthesized and fluorescently labeled. Fluorescence correlation spectroscopy was adopted to probe diffusion and chain size of polyzwitterion single chains in extremely dilute aqueous solutions over a broad concentration range of added salts. By the introduction of inorganic salts and organic inner salts, the single chains of polyzwitterions expanded with an increase of salt concentration. This observation indicates that the break-up of the dipole-dipole attraction between the zwitterion units is the mechanism of the anti-polyelectrolyte effect of polyzwitterions. The difference in the strength of the anti-polyelectrolyte effect induced by inorganic salts and organic inner salts also indicates the partial contribution from the asymmetric adsorption of ions onto polyzwitterion chains. (c) 2015 Society of Chemical Industry
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据