Aggregation Behavior of Long-Chain Piperidinium Ionic Liquids in Ethylammonium Nitrate

Molecules

Caili Dai²  Mingyong Du²  Yifei Liu²  Shilu Wang²  Jianhui Zhao²  Ang Chen²  Dongxu Peng²  Mingwei Zhao¹ 

[1] State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China;

关键词: aggregation behavior;    long-chain piperidinium ionic liquid;    surface tension;    dissipative particle dynamics;   

DOI  :  10.3390/molecules191220157

来源: mdpi

【 摘 要 】

Micelles formed by the long-chain piperidinium ionic liquids (ILs) N-alkyl-N-methylpiperidinium bromide of general formula C_nPDB (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 (Π_cmc), the maximum excess surface concentration (Г_max) and the minimum area occupied per surfactant molecule (A_min) can be obtained. A series of thermodynamic parameters () 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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.