Prasad M, Moulik S P, Palepu R
Department of Chemistry, Centre for Surface Science, Jadavpur University, Kolkata 700032, West Bengal, India.
J Colloid Interface Sci. 2005 Apr 15;284(2):658-66. doi: 10.1016/j.jcis.2004.10.063.
The micellization behavior of binary combinations of alkyltriphenylphosphonium bromides (ATPBs) with alkyl chain carbons 10, 12, 14, and 16 has been studied by conductometry and calorimetry. The combinations C(10)-C(12), C(10)-C(14), C(10)-C(16), C(12)-C(14), C(12)-C(16), and C(14)-C(16) were found to form two cmc's by both the methods, with good agreement, except C(14)-C(16)TPB, which has evidenced only a single cmc by calorimetry for all combinations. The combinations C(10)-C(12) (for both cmc(1) and cmc(2)) and C(10)-C(14)TPB (for cmc(2)) formed ideal mixtures, whereas the rest were nonideal. In the nonideal binary mixtures, the ATPB components showed antagonistic interaction with each other. The cmc, interaction parameter (beta), mixed micellar composition, extent of counterion binding, and thermodynamic parameters for the micellization process have been reported and discussed. The enthalpy of mixed micelle formation has been found to have a fair correlation with a Clint-type relation applicable to ideal binary mixtures of surfactants.
通过电导率法和量热法研究了碳链长度分别为10、12、14和16的烷基三苯基溴化鏻（ATPBs）二元组合的胶束化行为。除了C(14)-C(16)TPB通过量热法对所有组合仅显示一个临界胶束浓度（cmc）外，C(10)-C(12)、C(10)-C(14)、C(10)-C(16)、C(12)-C(14)、C(12)-C(16)组合通过这两种方法均发现形成两个临界胶束浓度，且结果吻合良好。C(10)-C(12)（对于临界胶束浓度1和临界胶束浓度2）和C(10)-C(14)TPB（对于临界胶束浓度2）组合形成理想混合物，而其余组合为非理想混合物。在非理想二元混合物中，ATPB组分之间表现出拮抗相互作用。已报道并讨论了临界胶束浓度、相互作用参数（β）、混合胶束组成、反离子结合程度以及胶束化过程的热力学参数。已发现混合胶束形成的焓与适用于表面活性剂理想二元混合物的克林特型关系具有合理的相关性。
