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Citation: WEN Fushan, KONG Xiangshuang, WANG Wei, HU Songqing, XIA Zheng, ZHANG Jun. Synthesis and Surface Properties of a Novel Cationic Trisiloxane Surfacant[J]. Chinese Journal of Applied Chemistry, ;2014, 31(10): 1216-1221. doi: 10.3724/SP.J.1095.2014.30649 shu

Synthesis and Surface Properties of a Novel Cationic Trisiloxane Surfacant

1.
Key Laboratory for New Energy of Physics and Materials Science of the Education Department of Shandong Province, Department of Materials Physics & Chemistry, College of Science, China University of Petroleum, Qingdao 266580, China

Corresponding author: ZHANG Jun,
Received Date: 20 December 2013
Available Online: 20 March 2014
Fund Project: 中国石油大学(华东)自主创新科研计划项目(14CX02001A) (华东)自主创新科研计划项目(14CX02001A)

Me₃SiOSiMeROSiMe₃(R=CH₂(CH₂)₇CHOCH₂)(AETS) has been synthesized through a hydrosilation of 1,2-eposy-9-decene(ED) with 1,1,1,3,5,5,5-heptamethyltrisiloxane(MD^HM) in the presence of hexachloroplatinic(Ⅳ) acid as the catalyst. Then a novel cationic trisiloxane surfactant with the formula Me₃SiOSiMeR₂OSiMe₃(R₂=CH₂(CH₂)₇CHOHCH₂N(CH₂CH₂OH)₂)(CTSS) has been prepared through the ring-opening reaction of diethanolamine(DEA) with AETS. The structure of CTSS was characterized by IR and ¹H NMR. The surface intension, wettability and stability in different pH of CTSS were investigated. The effect of reaction conditions on the synthesis of AETS and CTSS were investigated respectively. The optimized reaction conditions for the preparation of AETS are that the molar ratio of ED and MD^HM is 1.1:1, the catalyst loading is 0.075% of the n(MD^HM), the reaction time is 5 hours and the reaction temperature is 80℃. While the optimized reaction conditions to obtain CTSS are that the ratio of n(AETS) to n(DEA) is 1:1.05, the reaction time is 3 h and the reaction temperature is 80℃. CTSS can reduced the surface tension of distilled water to 20.0 mN/m at the critical micelle concentration(CMC) of 1.3×10^-3 mol/L. In addition, CTSS also has better wettability and maintains stable in pH 6.5~8.0.
- trisiloxane,
- surfactant,
- surface intension,
- wettability,
- emulsibility
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