物理化学学报 >> 2007, Vol. 23 >> Issue (09): 1415-1420.doi: 10.3866/PKU.WHXB20070920

研究论文 上一篇    下一篇

添加物对聚电解质成膜特性的影响及相关机理探讨

陈国; 姚善泾; 方柏山; 彭益强   

  1. 华侨大学工业生物技术福建省高等学校重点实验室, 福建 泉州 362021; 浙江大学化学工程与生物工程学系, 杭州 310027
  • 收稿日期:2007-03-29 修回日期:2007-06-06 发布日期:2007-09-06
  • 通讯作者: 陈国 E-mail:chenguo@china.com.cn

Effect of Additives on Characteristics of Polyelectrolyte Complex Membrane and Exploration of Related Mechanism

CHEN Guo; YAO Shan-Jing; FANG Bai-Shan; PENG Yi-Qiang   

  1. Fujian Province Key Laboratory of Industrial Biotechnology, Huaqiao University, Quanzhou 362021, Fujian Province, P. R. China; Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, P. R. China
  • Received:2007-03-29 Revised:2007-06-06 Published:2007-09-06
  • Contact: CHEN Guo E-mail:chenguo@china.com.cn

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摘要： 研究了添加不同分子量、不同带电特性的物质(如葡萄糖、PEG聚合物系列、NaCl和CMC)到成囊溶液中, 考察它们对制得的NaCS/PDMDAAC胶囊性质的影响. 同时, 测定了聚电解质稀溶液的粘度、电导、zeta电位及聚合物阴阳离子反应后的悬浊液的浊度及zeta电位. 结果表明, 通过添加物对稀电解质溶液性质的影响可判断其对胶囊特性的影响. 分析了添加物对NaCS与PDMDAAC反应的影响, 并根据溶液格子理论对胶囊的宏观特性变化提出了一个可能的微观解释.

关键词: 聚电解质, PEC 膜, 微胶囊, zeta 电位, 比浓粘度

Abstract: The membrane characteristics of capsules composed of sodiumcellulose sulfate (NaCS) and poly[dimethyl(diallyl)ammonium chloride] (PDMDAAC) were investigated under the condition of introducing other molecules. The small molecules, soluble polymers, soluble polyions, and salts of small molecule were individually added into polyanion (NaCS) solution to check their effects on capsule formation. The membrane thickness and mechanical intensity of capsules were studied under the condition of different concentration of additives. Meanwhile the effects of additives on viscosity and zeta potential of dilute NaCS solution were investigated. The results indicated that the effects of additives on the membrane characteristics could be judged by viscosity and zeta potential variation of dilute polyelectrolytes with addition of other molecules. The effect of additives on the reaction between polyelectrolytes was analyzed, and an explanation correlating the characteristics of capsule to the properties of dilute solution was proposed according to solution lattice theory.

Key words: Polyelectrolyte, PEC membrane, Microcapsule, Zeta potential, Reduced viscosity