文献类型：期刊文献

英文题名：Mixing of Surfactin, an Anionic Biosurfactant, with Alkylbenzene Sulfonate, a Chemically Synthesized Anionic Surfactant, at the n-Decane/Water Interface

作者：Gang, Hong-Ze[1,2,3,5];Bian, Peng-Cheng[1,2,3];He, Xiuli[1,2,3];He, Xiujuan[4];Bao, Xinning[1,2,3,4];Mu, Bo-Zhong[1,2,3,5];Li, Yingcheng[4];Yang, Shi-Zhong[1,2,3,5]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Engn Res Ctr Microbial Enhanced Oil Recovery, MOE, Shanghai 200237, Peoples R China;[4]Sinopec Shanghai Res Inst Petrochem Technol, Sinopec Key Lab Surfactants EOR, North Pudong 1658, Shanghai 201208, Peoples R China;[5]Shanghai Collaborat Innovat Ctr Biomfg Technol, Shanghai 200237, Peoples R China

年份：2021

卷号：24

期号：3

起止页码：445

外文期刊名：JOURNAL OF SURFACTANTS AND DETERGENTS

收录：;EI(收录号：20211110069305);WOS:【SCI-EXPANDED(收录号:WOS:000626300500001)】；

基金：This study was supported by funding from National Key Research and Development Program of China (No. 2017YFB0308900), National Natural Science Foundation of China (No. 51574125).

语种：英文

外文关键词：Surfactin; Alkylbenzene sulfonate; Mixed monolayer; Molecular dynamics simulation

摘要：Biosurfactants show synergic effects with synthesized surfactant in reducing hydrophobic/hydrophilic interfacial tension, while the understanding of the synergistic mechanism is limited. In the present work, mixed monolayers of surfactin and branched alkylbenzene sulfonate at the n-decane/water interface were studied using atomistic molecular dynamics simulations, and the presence of surfactin affecting the microstructure and dynamic properties of the mixed monolayer was evaluated at molecular level. The density distributions of the surfactants along the direction normal to the interface, radial distribution functions of the surfactant head groups, hydrophobic contacts between surfactants, translational activities of both surfactants and counterions, and the dynamics of the hydrogen bonds formed between surfactant and water were calculated. The results suggested that the structure of the mixed monolayers was more compact than that of the individual system of alkylbenzene sulfonate and the interfacial tension was more efficiently reduced, and the translational activities of both surfactants within the mixed monolayers were much lower. The results implied that biosurfactant surfactin and alkylbenzene sulfonate mixed well at the n-decane/water interface, though they were both anionic surfactants.