文献类型：期刊文献

英文题名：Amphiphilic nanosheet self-assembly at the water/oil interface: computer simulations

作者：Xiang, Wenjun[1];Zhao, Shuangliang[2];Song, Xianyu[3];Fang, Shenwen[4];Wang, Fen[1];Zhong, Cheng[3];Luo, Zhaoyang[3]

机构：[1]Sichuan Univ Arts & Sci, Sch Chem & Chem Engn, Dazhou 635000, Sichuan, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Dazhou Vocat & Tech Coll, Dept Mech & Elect Engn, Dazhou 635000, Sichuan, Peoples R China;[4]Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Peoples R China

年份：2017

卷号：19

期号：11

起止页码：7576

外文期刊名：PHYSICAL CHEMISTRY CHEMICAL PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000397569900016)】；

基金：This work is supported by the scientific research fund of Sichuan Provincial Education Department (17ZA0337 and 15ZA0317), and Dazhou Administration of Science & Technology (KJJ201403). We also acknowledge the National Key Basic Research Program of China (2014CB748500), the National Natural Science Foundation of China (91434110), the Blue Fire Project from the National Department of Education (2014-LHJHHSZX-015), and the Fundamental Research Funds for the Central Universities of China. S.Z. also acknowledges the support of the Fok Ying Tong Education Foundation (151069).

语种：英文

摘要：In this paper, dissipative particle dynamics simulations are performed to study the interfacial and emulsion stabilizing properties of various systems of amphiphilic nanosheets (ANs) self-assembled at the oil/water (O/W) interface. The ANs have a dimensional symmetry structure that encompasses a triangular-plate at the center and two soft comb-like shells constructed with hydrophilic and hydrophobic polymers. As the simulation results show, the AN molecules are highly oriented in interfacial films with their triangular nanosheets parallel to the O/W interface, while their hydrophobic and hydrophilic segments attempt to immerse into the oil phase and aqueous phase, respectively. These results reveal that the rotation of ANs at oil/water interfaces is greatly restricted, meanwhile, their nanosheet (or planar) configuration facilitates their favorable orientation thereby, thus making the emulsion more stable. At higher concentrations, a wrapped-like or micelle morphology is observed. The O/W emulsions stabilized by ANs were also simulated, and it is interesting to find AN `patches' at the O/W interface which resembles the leather patches on a football. By introducing the ``amphiphilic nanosheet balance'' concept, the hydrophiliclipophilic balance (HLB) values of ANs were calculated. Due to their properties of two-dimensional symmetry, the HLB values of ANs tend to approximately 1 which reveals a stronger stability for emulsions.