| PSS/PDDA自组装膜形成过程中的临界浓度效应 |
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| 引用本文： | 陈幼芳,钱锦文,杨平,林贤福.PSS/PDDA自组装膜形成过程中的临界浓度效应[J].高等学校化学学报,2005,26(4):787-789. |
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| 作者姓名： | 陈幼芳 钱锦文 杨平 林贤福 |
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| 作者单位： | 1. 浙江大学化学系;
2. 浙江大学高分子科学系, 杭州 310027 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);中国科学院资助项目 |
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| 摘 要： | Decher等提出的阴阳聚电解质层层组装膜技术(LbL)，方便快捷，结构有序，其纳米级可控，可用于生物传感器、杂多酸多层膜修饰电极及天然多糖类功能膜等领域．LbL膜的厚度直接影响其性能，而膜厚度与紫外吸光度(A)成正比．故A是通常用于评价膜厚度的一种简便方法．紫外吸光度与聚电解质溶液浓度(cp)往往呈递增关系，随着溶液中cp的增大，单位面积上吸附聚电解质的量也增加。
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| 关 键 词： | 自组装膜 聚电解质 高分子浓度 临界浓度 |
| 文章编号： | 0251-0790(2005)04-0787-03 |
| 收稿时间： | 2004-11-30 |
| 修稿时间： | 2004年11月30 |
Critical Concentration Effect During the Preparation of Self-assembled PSS/PDDA Multilayer Films |
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| CHEN You-Fang,QIAN Jin-Wen,YANG Ping,LIN Xian-Fu.Critical Concentration Effect During the Preparation of Self-assembled PSS/PDDA Multilayer Films[J].Chemical Research In Chinese Universities,2005,26(4):787-789. |
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| Authors: | CHEN You-Fang QIAN Jin-Wen YANG Ping LIN Xian-Fu |
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| Institution: | 1. Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
2. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | UV absorbance(A) of self-assembled films of poly(dimethyldiallyl ammonium chloride)(PDDA) and poly(styrene sulfonate)(PSS) with various concentrations of polyelectrolyte(cP) at different concentrations of sodium chloride was investigated. It was found that the A～cP curves display a discontinuous phenomenon. And the turning point concentration, at which the A～cP curve starts to display a discontinuous phenomenon, is in good agreement with the critical concentration c of PSS or PDDA polyelectrolyte solutions. The results above attribute to the change of chain shape of polyelectrolytes in solutions caused by cP and c(NaCl). Thus, it is inferred that chain shape of polyelectrolyte in solutions affects the thickness of PSS/PDDA multilayer films. |
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| Keywords: | Self-assembled film Polyelectrolyte Polymer concentration Critical concentration |
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