SIOC English
化学学报
高级检索

化学学报 ›› 2010, Vol. 68 ›› Issue (01): 89-94. 上一篇    下一篇

研究论文

天然高分子电场敏感水凝胶——大豆蛋白/羧甲基壳聚糖体系

管娟1，许惠心1，黄郁芳2，田琨1，邵正中1，陈新*,1   

  1. (1教育部聚合物分子工程重点实验室 复旦大学高分子科学系 先进材料实验室 上海 200433)
    (2复旦大学材料科学系 国家微分析中心 上海 200433)
  • 投稿日期:2009-07-21 修回日期:2009-08-28 发布日期:2010-01-20
  • 通讯作者: 陈新 E-mail:chenx@fudan.edu.cn

Natural Polymer Electroactive Hydrogel——Soybean Protein/carboxymethylchitosan System

Guan Juan1 Xu Huixin1 HuangYufang2 Tian Kun1 Shao Zhengzhong1 Chen Xin*,1   

  1. (1 The Key Laboratory of Molecular Engineering of Polymers of the Ministry of Education of China, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433)
    (2 Department of Material Science, National Microanalysis Center, Fudan University, Shanghai 200433)
  • Received:2009-07-21 Revised:2009-08-28 Published:2010-01-20
  • Contact: CHEN Xin E-mail:chenx@fudan.edu.cn

PDF

1521

通过将大豆蛋白(SPI)和羧甲基壳聚糖(CMCS)进行溶液共混, 并加入环氧氯丙烷作为交联剂, 成功制备了一种天然高分子两性荷电水凝胶. 这种SPI/CMCS水凝胶在电场的作用下可以快速弯向一侧电极, 表现出很好的电场敏感性. 由于该水凝胶具有两性荷电的特性, 因此其在不同pH值的电解质溶液中既可以弯向阳极(当pH＜6时), 也可以弯向阴极(当pH＞6时). 除了pH的变化, 其他诸如施加电压的大小以及水凝胶的厚度也会对SPI/CMCS水凝胶在电场中的行为产生影响. 相比于先前报道的另外两种天然高分子电场敏感水凝胶, 即壳聚糖/羧甲基纤维素水凝胶和壳聚糖/羧甲基壳聚糖水凝胶, SPI/CMCS水凝胶在酸性较强(pH＝3～4)以及中性(pH＝7)的环境中仍能表现出良好的电场敏感性, 拓展了天然高分子电场敏感水凝胶的应用范围.

关键词: 蛋白质, 多糖, 两性荷电, 智能水凝胶

A natural amphoteric polyelectrolyte hydrogel film was prepared by solution blending of soybean protein (SPI) and carboxymethylchitosan (CMCS), and cross-linked with epichlorohydrin. Under electric stimulus such a hydrogel quickly bends toward one electrode, showing an electrical sensitive behavior. Because of its amphoteric nature, the hydrogel bends either toward the anode (pH＜6) or cathode (pH＞6), depending on the pH of the electrolyte solution. Besides pH value, other factors, such as electric field strength and thickness of the hydrogel also influence the electromechanical behavior of the hydrogels. Compared with two other natural electroactive hydrogels, i.e., chitosan/carboxymethylcellulose hydrogel and chitosan/carboxymethylchitosan hydrogel reported previously, SPI/CMCS hydrogel exhibits a good electrical sensitivity either at a relative strong acidic condition (pH＝3～4) or a neutral condition (pH＝7), which widen the application area of the natural electroactive hydrogels.

Key words: protein, polysaccharide, amphoteric, smart hydrogel