Micellization and interfacial behavior of 16-E2-16 in presence of inorganic and organic salt counterions
Micellization and interfacial behavior of 16-E2-16 in presence of inorganic and organic salt counterions
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DOI：
10.1016/j.colsurfa.2013.09.007
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发表时间：
2014-01-20
影响因子：
5.2
通讯作者：
Kabir-ud-Din
中科院分区：
文献类型：
--
作者：
Akram, Mohd.;Yousuf, Sabreena;Kabir-ud-Din
研究了无机盐和有机盐对可生物降解的酯键阳离子双子表面活性剂二氯乙烷-1，2-二基-双（N，N-二甲基-N-十六烷基乙酰氧基铵）（简称16-E2-16）胶束化行为的影响。研究了双子表面活性剂与不同盐（KCl、KNO 3、KSCN、NaBen和NaSal）的临界胶束浓度（cmc）、胶束化自由能（Δ G（m）度）、吸附自由能（Δ G（ads）度）和聚集数N-agg。事实上，我们的结果清楚地表明，两种抗衡离子（从各自的盐获得）以完全不同的方式影响16-E 2 -16的聚集行为，并且发现促进表面活性剂聚集的能力的顺序为NaSal > NaBen > KSCN > KNO 3> KCl。反离子对离子型表面活性剂体系的临界胶束浓度、聚集数、聚集体的大小和形状有很大的影响。这些结果为理解离子对控制带电两亲分子聚集体形态和溶液性质的力的微妙平衡的影响提供了新的见解。用表面张力、粘度、H-1 NMR和荧光等技术研究了反离子的作用机理。(C)2013爱思唯尔有限公司版权所有。
The effect of salts (inorganic and organic) was investigated and analyzed to probe the micellization behavior of a biodegradable ester-bonded cationic gemini surfactant ethane-1,2-diyl-bis(N,N-dimethyl-N-hexadecylammoniumacetoxy) dichloride, referred to as 16-E2-16. We investigated the critical micelle concentration (cmc), free energy of micellization (Delta G(m)degrees), free energy of adsorption (Delta G(ads)degrees) and aggregation number N-agg of the gemini surfactant with different types of salts (KCl, KNO3, KSCN, NaBen, and NaSal). Indeed, our results clearly indicate that the two kinds of counterions (obtained from the respective salts) affect the aggregation behavior of 16-E2-16 in quite different ways and the order of ability to promote surfactant aggregation is found to be as NaSal > NaBen > KSCN > KNO3 > KCl. The counterions exert strong influence on the cmc, aggregation number and size and shape of aggregates of ionic surfactant systems. The results provide new insight in understanding the effect of ions on the delicate balance of forces controlling aggregate morphology and solution properties of charged amphiphilic molecules. The action mechanism of counterions has been investigated employing surface tension, viscosity, H-1 NMR and fluorescence techniques. (C) 2013 Elsevier B.V. All rights reserved.