Tetrasiloxane room temperature ionic liquids: adsorption and aggregation properties in aqueous solution

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• 作者：Ping Li ; Xiaoyi Yang ; Chaohua Guo ; Guoyong Wang ; Wei Zhang
• 关键词：Room temperature ionic liquids ; Tetrasiloxane ; Static/dynamic surface tension ; Vesicles
• 刊名：Colloid & Polymer Science
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：293
• 期：9
• 页码：2625-2634
• 全文大小：1,164 KB
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• 作者单位：Ping Li (1)
  Xiaoyi Yang (1)
  Chaohua Guo (1)
  Guoyong Wang (1)
  Wei Zhang (1)
  
  1. China Research Institute of Daily Chemical Industry, 34 Wenyuan Street, Taiyuan, Shanxi Province, 030001, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Physical Chemistry
  Soft Matter and Complex Fluids
  Characterization and Evaluation Materials
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-1536

文摘

The adsorption and aggregation behavior of three tetrasiloxane surface active room temperature ionic liquids, N-(2-aminoethyl)-3-aminopropyltetrasiloxane carboxylic acid ammonium, [Si(4)N(2)-2CA(n) (n--, 2, 3)], have been studied on the basis of static/dynamic surface tension, conductivity, dynamic light scattering (DLS), and transmission electron microscopy (TEM). The static surface tension of the Si(4)N(2)-2CA(n) aqueous solutions measured at the critical aggregation concentration (CAC) is observed to be significantly lower than that of amide-functionalized ILs and is comparable to those reported for trisiloxane RT-SAILs, N-(2-aminoethyl)-3-aminopropyltrisiloxane carboxylic acid ammonium and 3-aminopropyltrisiloxane carboxylic acid ammonium. The dynamic surface tension results indicate that adsorption process is a mixed diffusion-kinetic adsorption mechanism. DLS and TEM analysis of Si(4)N(2)-2CA(n) solutions reveal that they can self-assemble into vesicles with an average diameter in the range of 70-00 nm. Keywords Room temperature ionic liquids Tetrasiloxane Static/dynamic surface tension Vesicles