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Novel ionic liquid-type Gemini surfactants: Synthesis, surface property and antimicrobial activity
被引:113
作者:
Li, Hongqi
[1
]
Yu, Chaochao
[1
]
Chen, Rui
[1
]
Li, Juan
[1
]
Li, Jinxing
[1
]
机构:
[1] Donghua Univ, Key Lab Sci & Technol Ecotext, Minist Educ, Coll Chem Chem Engn & Biotechnol, Shanghai 201620, Peoples R China
关键词:
Gemini surfactants;
Ionic liquid;
Surface activity;
Foaming ability;
Antimicrobial activity;
AGGREGATION PROPERTIES;
ADSORPTION;
MICELLIZATION;
BROMIDE);
INTERFACE;
BEHAVIOR;
GLYCOL;
D O I:
10.1016/j.colsurfa.2011.12.014
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Novel quaternary ammonium Gemini surfactants, which turned out to be ionic liquids due to the intermolecular hydrogen bonding formed from hydroxyl groups in the spacers, were synthesized and characterized by IR, H-1 NMR, C-13 NMR and mass spectra. The surface properties of the Gemini surfactants were investigated by means of surface tension measurements. Surface tension parameters including surface excess concentration, Gamma(cmc), surface area demand per molecule, A(cmc), efficiency in surface tension reduction, pC(20), the effectiveness of surface tension reduction, gamma(cmc), critical micelle concentration, CMC, and standard free energy of micellization, Delta G(ads)(0) and Delta G(mic)(0) were obtained. The results indicated that compared with those of their corresponding conventional single-chain surfactant counterparts, these novel Gemini surfactants exhibited lower CMC values and greater efficiency in lowering the surface tension of water. The foamability and foam stability of these Gemini surfactants decreased with the increase in the length of the spacer chain. Gemini surfactants with alkyl chains of moderate length (C-12 Or C-14) showed the best foamability and the highest foam stability. Some of the Gemini surfactants exhibited antimicrobial activity against Gram-negative bacteria Escherichia coli. (C) 2011 Elsevier B.V. All rights reserved.
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页码:116 / 124
页数:9
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