期刊
JOURNAL OF CHEMICAL AND ENGINEERING DATA
卷 58, 期 6, 页码 1529-1534出版社
AMER CHEMICAL SOC
DOI: 10.1021/je301147k
关键词
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资金
- National Research Foundation (NRF)
- Korea government (MEST) [2011-0017435, 2011-0031496]
- Sogang University [SRF-20124003]
- National Research Foundation of Korea [2011-0031496, 2011-0017435] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The interfacial and bulk properties of the aqueous solutions of imidazolium-based ionic liquids with different halide anions ([C(12)mim]Cl, [C(12)mim]Br, [C(12)mim]I) were investigated by surface tension and electrical conductivity measurements. The lowest surface tension (gamma(cmc)) and maximum surface excess concentration (Gamma(max)) values from the surface tension measurements showed that [C(12)mim]I had the highest surface activity. The thermodynamic pontentials of micellization (Delta G(m)(0), Delta H-m(0), Delta S-m(0)) indicated that the micellization of [C(12)mim]Cl and [C(12)mim]Br was entropy-driven, while that of [C(12)mim]I was enthalpy-driven at 15 degrees C but entropy-driven above 20 degrees C. This distinct behavior for [C(12)mim]I was thought to be due to the higher binding affinity of I- to the micellar interface.
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