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

Caili Dai; Mingyong Du; Yifei Liu; Shilu Wang; Jianhui Zhao; Ang Chen; Dongxu Peng; Mingwei Zhao

doi:10.3390/molecules191220157

Molecules (Dec 2014)

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

Caili Dai,
Mingyong Du,
Yifei Liu,
Shilu Wang,
Jianhui Zhao,
Ang Chen,
Dongxu Peng,
Mingwei Zhao

Affiliations

Caili Dai: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Mingyong Du: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Yifei Liu: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Shilu Wang: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Jianhui Zhao: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Ang Chen: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Dongxu Peng: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
Mingwei Zhao: State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China

DOI: https://doi.org/10.3390/molecules191220157
Journal volume & issue: Vol. 19, no. 12
pp. 20157 – 20169

Abstract

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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.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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