刷子
聚电解质
聚合物
聚合物刷
材料科学
溶剂
纳米技术
化学工程
离子强度
化学物理
高分子化学
化学
复合材料
水溶液
有机化学
工程类
聚合
作者
Jessica Faubel,Riddhi P. Patel,Wenbin Wei,Jennifer E. Curtis,Blair Brettmann
出处
期刊:ACS Macro Letters
[American Chemical Society]
日期:2019-09-25
卷期号:8 (10): 1323-1327
被引量:11
标识
DOI:10.1021/acsmacrolett.9b00530
摘要
Polyelectrolyte brushes are important stimuli-responsive materials in a variety of technological applications as well as in biological systems. Their small size, however, introduces characterization challenges, particularly in studying 3D structure and time-dependent behavior. In this Letter, we report on the polyelectrolyte brush behavior of extra-large hyaluronan brushes (∼15 μm) recently developed using an enzyme-mediated growth process. In response to increasing ionic strength, the brush displays the osmotic brush regime and the salted brush regime. We also show a collapse of 96% when the brush is placed in a poor solvent. This collapse is rapid when changing from a good to poor solvent, but re-expansion is slow when changing back to a good solvent. The observed brush behavior described in this Letter is similar to that seen for smaller polyelectrolyte brushes, indicating that these larger brushes may serve as model systems to study more complex phenomena through confocal microscopy.
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