Effect of trace electrolyte on liquid crystal type of cellulose microcrystals

被引：234

作者：

Araki, J ^{[1
]}

Kuga, S ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biomat Sci, Bunkyo Ku, Tokyo 1138657, Japan

来源：

LANGMUIR | 2001年 / 17卷 / 15期

关键词：

D O I：

10.1021/la0102455

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The rodlike microcrystal suspension prepared by sulfuric acid hydrolysis of bacterial cellulose was found to undergo spontaneous nematic phase separation after complete desalination. This phase separation was preceded by a birefringent glassy-like state for about 1 week. Addition of trace electrolyte (< 1 mM NaCl) caused remarkable changes in phase separation behavior; i.e., the separation was complete in 2 days and the anisotropic phase became chiral nematic. This phenomenon can be explained by the change in the effective particle shape, from cylindrical to the twisted rod as a result of screening of surface charge.

引用

页码：4493 / 4496

页数：4

共 19 条

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