【作者】 陈幼芳； 钱锦文； 杨平； 林贤福；

【Author】 Youfang Chen, Jingwen Qian, Ping Yang, Xianfu LinDepartment of Chemistry, Zhejiang University, Hangzhou, 310027, ChinaDepartment of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

【机构】 浙江大学化学系； 浙江大学高分子系；

【摘要】 <正> 带有相反电荷的聚电解质通过静电作用交替沉积可以得到自组装多层膜。膜的渗透性能与膜材料种类和膜的微观结构有关,而微观结构又与制膜过程中的多种因素相关,如聚电解质溶液浓度,pH,外加盐种类,离子强度及膜的层数等。其中,聚电解质溶液浓度尤为重要,它能明显影响膜的厚度,膜的粗燥度,膜中高分子聚集体的尺寸,膜中高分子最大紫外吸收峰的位置与强度[2]等。本文采用粘度法测定了聚电解质聚苯乙烯磺酸钠(PSS)和聚二甲基二烯丙基氯化铵(PDDA)在氯化钠浓度不同的水溶液中30℃时的特性粘数。采用石英片作基片,在恒定氯化钠溶液浓度更多还原

【Abstract】 Self-assembled films of poly (dimethyldiallyl ammonium chloride) (PDDA) and poly (styrene sulfonate) (PSS) with various solution concentrations of polyelectrolyte at different concentrations of sodium chloride were prepared by LbL. The relation between UV absorbance of the film (A) and the concentration of polyelectrolyte (Cp) was investigated. It was found that the A values exhibit increasing, constant and decreasing with increasing the solution concentrations of polyelectrolyte, respectively; furthermore, the A-Cp curves displayed a discontinuous phenomenon mostly. And the results obtained were discussed using the chain shape and critical concentration in polymer solution.更多还原