文献类型：期刊文献

英文题名：Synthesis, Micellization, and Surface Activity of Novel Linear-Dendritic Carboxylate Surfactants

作者：Lou, Yuning[1];Dong, Yajuan[1,3];Wang, Xiaoyong[1];Gong, Feirong[2];Zhao, Min[1];Rong, Zongming[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Enkun Chem Co Ltd, Shanghai 200444, Peoples R China

年份：2021

卷号：24

期号：1

起止页码：3

外文期刊名：JOURNAL OF SURFACTANTS AND DETERGENTS

收录：;EI(收录号：20203809194156);WOS:【SCI-EXPANDED(收录号:WOS:000568615800001)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant 21573071).

语种：英文

外文关键词：Linear-dendritic surfactant; Krafft temperature; Micellization; Electrical conductivity; Surface tension

摘要：Two generations of novel linear-dendritic carboxylate surfactants C-18-G(1)-(COONa)(2)and C-18-G(2)-(COONa)(4)have been synthesized by the divergent method and their structures are characterized by(1)H Nuclear Magnetic Resonance and Infrared analysis. The electrical conductivity measurement is used to measure the Krafft temperatures of C-18-G(1)-(COONa)(2)and C-18-G(2)-(COONa)(4), which are much smaller than those of the corresponding conventional surfactant sodium stearate. The markedly enhanced solubility of two linear-dendritic surfactants is ascribed to the high hydrophilicity of surfactant headgroups induced by the carboxylate and ester groups. The critical micelle concentration (CMC) values obtained from both the electrical conductivity and surface tension measurements indicate that the micellizations of linear-dendritic surfactants become favorable with the increase in the number of the surfactant headgroup. However, the surface activity parameters including the surface tension at the CMC, maximum surface excess, and minimum surface area reveal that C-18-G(1)-(COONa)(2)exhibits greater efficiency in absorbing at the air/water interface compared to C-18-G(2)-(COONa)(4), owing to their different steric repulsions of the surfactant headgroups. In addition, C-18-G(1)-(COONa)(2)and C-18-G(2)-(COONa)(4)have higher emulsifying ability than the conventional surfactants sodium stearate and sodium octadecyl sulfate.