高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (2): 321.

• 研究简报 • 上一篇    下一篇

聚电解质复合物在表面活性剂水溶液中的溶解机理

罗嗥, 郑晓亮, 曹维孝   

  1. 北京大学化学与分子工程学院, 北京 100871
  • 收稿日期:1999-06-17 出版日期:2000-02-24 发布日期:2000-02-24
  • 通讯作者: 曹维孝(1935年出生),男,教授,博士生导师,主要从事感光性功能高分子研究.
  • 基金资助:

    国家自然科学基金(批准号:29633110,29874001)资助

The Dissolution Mechanism of Polyelectrolyte Complex in Surfactant Aqueous Solution

LUO Hao, ZHENG Xiao-Liang, CAO Wei-Xiao   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:1999-06-17 Online:2000-02-24 Published:2000-02-24

关键词: 聚电解质复合物, 表面活性剂, 热分解温度, 疏水相互作用

Abstract: Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure. It was found that the solubility of this complex was greatly enhanced in aqueous solution of sodium dodecyl sulfate(SDS). The solubility of DR-PSMNa complex in0.1 mol/Land 0.15 mol/L SDSaqueous solution was determined to be 0.024 g/mLand 0.033 g/mLrespectively. It was also confirmed that the complex from DR and SDS, which does not dissolve in water, can also dissolve in SDSaqueous solution. The decomposition temperature(Td) of diazonium groups for different complexes was determined by DSCand shows that the Tdof DR-PSMNa after dissolution in SDSaqueous solution changes to 146 ℃ from the original value of 133 ℃. It was proposed that during the dissolution of PECin surfactant aqueous solution, the complex is separated to its two components via the interaction between PECand surfactant molecules at first, then the components dissolve in water.

Key words: Polyelectrolyte complex, Surfactant, Thermodecomposition temperature, Hydrophobic interaction

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