title: Aggregation behavior of long-chain piperidinium ionic liquids in ethylammonium nitrate.
abstract: Micelles formed by the long-chain piperidinium ionic liquids (ILs) N-alkyl-N-methylpiperidinium bromide of general formula CnPDB (n = 12, 14, 16) in ethylammonium nitrate (EAN) were investigated through surface tension and dissipative particle dynamics (DPD) simulations. Through surface tension measurements, the critical micelle concentration (cmc), the effectiveness of surface tension reduction (Πcmc), the maximum excess surface concentration (Гmax) and the minimum area occupied per surfactant molecule (Amin) can be obtained. A series of thermodynamic parameters (DG0 m, DH0 m and DS0 m) of micellization can be calculated and the results showed that the micellization was entropy-driven. In addition, the DPD simulation was performed to simulate the whole aggregation process behavior to better reveal the micelle formation process.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. daicl306@163.com.
authors.forename: Caili
authors.initials: C
authors.lastname: Dai
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. upcdmy@163.com.
authors.forename: Mingyong
authors.initials: M
authors.lastname: Du
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. zgsydxliuyifei@163.com.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. wangshilu2009@126.com.
authors.forename: Shilu
authors.initials: S
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. jessica_zjh@hotmail.com.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. chenang1016@126.com.
authors.forename: Ang
authors.initials: A
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. pengdx731@163.com.
authors.forename: Dongxu
authors.initials: D
authors.lastname: Peng
authors.affiliation: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China. zhaomingwei@upc.edu.cn.
authors.forename: Mingwei
authors.initials: M
authors.lastname: Zhao
mesh_terms: D003198:Computer Simulation; D052578:Ionic Liquids / Q000737:chemistry*; D008823:Micelles; D010880:Piperidines / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013500:Surface Tension; D013696:Temperature
chemical_list: D052578:Ionic Liquids; D008823:Micelles; D010880:Piperidines; D000644:Quaternary Ammonium Compounds; C421484:ethylammonium