标题：The Synthesis and Characterization of a Novel Cationic Asphalt Emulsifier
作者：Gong, Xue-Di; Shi, Lai-Shun; Wang, Tian-Yao; Yu, Xiao-Meng
作者机构：[Gong, Xue-Di; Shi, Lai-Shun; Wang, Tian-Yao; Yu, Xiao-Meng] Shandong Univ, Sch Chem & Chem Engn, Jinan 250061, Shandong, Peoples R China.
会议名称：2nd International Conference on Composite Material, Polymer Science and Engineering (CMPSE)
会议日期：SEP 21-22, 2018
来源：2ND INTERNATIONAL CONFERENCE ON COMPOSITE MATERIAL, POLYMER SCIENCE AND ENGINEERING (CMPSE2018)
摘要：A new cationic asphalt emulsifier of N,N-dimethyl-N-(3-(N',N'-dimethyl amido)-2-hydroxy propyl)-coconut oil amide propyl-1-ammonium chloride was synthesized by two steps reaction of coconut oil acyl propyl dimethyl tertiary amine (PKO), epoxy chloropropane and dimethylamine. The chemical structure of the key intermediate of N,N-dimethyl-N-(ethylene oxide-2-methylene)-coconut oil amide propyl-1-ammonium chloride was confirmed by FTIR, H-1 NMR and elemental analysis. The optimum reaction condition of first step was obtained by single factor analysis: reaction time 5 h, reaction temperature 50 degrees C, feedstock mole ratio of epoxy chloropropane to PKO 1.05. The reaction yield is 82.15% and the epoxy value is 40.39% at the optimum conditions. The critical micelle concentration (CMC) of the asphalt emulsifier is 7.80x10(-2) mol/L. The surface tension at CMC is 24.57 mN/m. The emulsifier showed excellent emulsification effect for the asphalt. The prepared bituminous emulsion had higher storage stability. The emulsifier belongs to medium-set asphalt emulsifier.