Shear-induced mixing and demixing in aqueous methyl hydroxypropyl cellulose solutions

被引：12
|
作者：
Schmidt, J
Burchard, W
Richtering, W
机构：
[1] Univ Kiel, Inst Phys Chem, D-24098 Kiel, Germany
[2] Univ Freiburg, Inst Makromol Chem, D-79104 Freiburg, Germany
来源：
BIOMACROMOLECULES | 2003年 / 4卷 / 02期
关键词：
D O I：
10.1021/bm025722s
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The influence of shear flow on the phase separation of aqueous methyl hydroxypropyl cellulose solutions was investigated by means of rheoturbidity and online rheo small angle light scattering (SALS) experiments. In semidilute solution shear-induced mixing was observed and the cloud curve was shifted to higher temperatures with increasing shear rate. With higher concentrated solutions, however, shear-induced demixing was found. The shear-induced mixing is interpreted as being a disruption of slightly entangled clusters under the influence of the shear energy. The shear demixing appears in line with the observation with other systems. A characteristic butterfly pattern was observed in rheo-SALS.
引用
收藏
页码：453 / 460
页数：8
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