Water distribution in multilayers of weak polyelectrolytes

被引：43

作者：

Tanchak, Oleh M.

Yager, Kevin G.

Fritzsche, Helmut

Harroun, Thad

Katsaras, John

Barrett, Christopher J.

机构：

[1] McGill Univ, Dept Chem, Montreal, PQ, Canada

[2] Natl Res Council Canada, Canadian Neutron Beam Ctr, Chalk River, ON, Canada

[3] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[4] Univ Guelph, Guelph Waterloo Phys Inst, Guelph, ON N1G 2W1, Canada

[5] Univ Guelph, Biophys Interdept Grp, Guelph, ON N1G 2W1, Canada

来源：

LANGMUIR | 2006年 / 22卷 / 11期

关键词：

D O I：

10.1021/la0529613

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The water localization in thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly( allylamine hydrochloride) was investigated with neutron reflectivity in an atmosphere of controlled humidity and with bulk water. Water was found to be distributed asymmetrically within the multilayer and to localize preferentially at the polymer surface. The diffusion of water into the multilayer did not completely penetrate to the substrate, but instead there appeared to be an exclusion zone near the Si substrate. These results help to explain previous observations of anomalous water transport kinetics in weak polyelectrolyte systems.

引用

页码：5137 / 5143

页数：7

共 29 条

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