摘要
通过测定表面张力,研究了离子液体型表面活性剂溴化1-十六烷基-3-甲基咪唑(C16mimBr)和非离子表面活性剂Triton X-100(TX100)混合体系分别在水溶液和20%乙二醇(体积分数)水溶液中的表面性质和胶团化行为.结果表明,混合体系在水溶液和20%乙二醇水溶液中都存在协同效应,乙二醇的加入降低了协同作用,混合体系的临界胶束浓度随乙二醇加入而增大.利用Rubingh模型和Motomura模型计算了混合物中各组分在表面吸附层和胶团相中的组成、相互作用参数以及表面吸附超额自由能和胶团形成超额自由能.在水溶液和20%乙二醇水溶液中,发现该混合体系在非离子组分摩尔分数约为0.65时,协同效应最强.
The surface properties and micellization behavior of binary mixture of ionic liquid surfactant 1-hexadecyl-3-methylimidazolium bromide （C16mimBr） and nonionic surfactant Triton X-100 （TX100） were investigated in water and in 20% （V/V） ethylene glycol （EG） aqueous solution, respectively, employing tensiometric technique. It is shown there are synergistic effects on mixed adsorbed film and mixed micelle formation both in water and in 20% ethylene glycol aqueous solution. When the molar fraction of TX100 in mixture is about 0.65, the synergistic effect is at its optimum. The critical micelle concentration （cmc） of the mixture increases with EG being added in solvent. The established theories of Rubingh and Motomura were applied to determine the molar fraction of the different components, the interaction parameters and several thermodynamic properties of the mixed adsorbed film and micelle phase. It was found that the compositions of mixed monolayer and micelle, and the excess free energy of micelle formation from Rubingh＇ s model and Motomura＇s model were in agreement.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2011年第22期2658-2664,共7页
Acta Chimica Sinica
