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China Surfactant Detergent & Cosmetics ›› 2014, Vol. 44 ›› Issue (11): 611-614.doi: 10.13218/j.cnki.csdc.2014.11.136

• Development and application • Previous Articles     Next Articles

Synthesis and surface activity of the ester group trimethoxy organosilicon quaternary ammonium salt

CHEN Rui-lan, ZHANG Jun-jie, MAO Tao-yan, ZHENG Cheng   

  1. Fine Chemical Research Institute,Guangzhou University,Guangzhou,Guangdong 510006,China
  • Received:2014-06-06 Online:2014-11-22 Published:2019-04-08

Abstract: An ester group trimethoxy organosilicon quaternary ammonium salt was synthesized with stearic acid,dimethylethanolamine (DMEA) and γ-chloropropyl trimethoxy siloxane as starting materials.Structure of the product was characterized by FTIR,ESI-MS and 1HNMR,and the characterization results showed that the product is accord with the target.Via orthogonal designed experiments,the optimum reaction conditions for preparing the intermediate stearic acid dimethylethanolamine ester were obtained as:reaction temperature,180 ℃;reaction time,8 h;mole ratio,n(stearic acid):n(DMEA)=1:1.6;dosage of the catalyst,0.5%;and for the quaternarization,reaction temperature,110 ℃ under nitrogen atmosphere;mole ratio,n(stearic acid dimethylethanolamine ester):n(γ-chloropropyl trimethoxy siloxane)=1:1.4;dosage of the catalyst,0.5%;reaction time,28 h.The cmc of the product under 298 K were determined by steady-state fluorescence analysis as 0.009 3 g·L-1.

Key words: ester group trimethoxy organosilicon quaternary ammonium salt, synthesis, surface activity, steady-state fluorescence analysis

CLC Number: 

  • TQ423