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Molecules 2014, 19(12), 20157-20169; doi:10.3390/molecules191220157

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

State Key Laboratory of Heavy Oil Processing, School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, Shandong, China
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Received: 13 October 2014 / Revised: 7 November 2014 / Accepted: 21 November 2014 / Published: 2 December 2014
(This article belongs to the Section Organic Synthesis)
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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. View Full-Text
Keywords: aggregation behavior; long-chain piperidinium ionic liquid; surface tension; dissipative particle dynamics aggregation behavior; long-chain piperidinium ionic liquid; surface tension; dissipative particle dynamics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dai, C.; Du, M.; Liu, Y.; Wang, S.; Zhao, J.; Chen, A.; Peng, D.; Zhao, M. Aggregation Behavior of Long-Chain Piperidinium Ionic Liquids in Ethylammonium Nitrate. Molecules 2014, 19, 20157-20169.

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