The interactions between the polymer polyvinylpyrrolidone (PVP) and conventional surfactants such as cetyltrimethylammonium chloride (CTACl) and cetyltrimethylammonium bromide (CTABr) were investigated using a conductometric method. The critical micelle concentrations (CMCs), the critical aggregation concentrations (CACs) and degrees of ionization (α) of aqueous solutions of the surfactants and PVP were determined via electrical conductivity measurements at various temperatures. The thermodynamic parameters (Gibbs free energy, enthalpy and entropy) of the surfactants were calculated in the absence and presence of the polymer, and the results were compared to determine the effects of counter ion on the micellization of the surfactants and the energetics of the process. The main goal of this work is to elucidate the various driving forces that lead to complexation between the surfactants and polymer. Electrostatic interactions play a major role in the binding of surfactants to polymers or surfaces in aqueous systems. The strength of the interaction is found to depend on the nature of the surfactant counter ion type.

使用电导法研究了聚合物聚乙烯吡咯烷酮（PVP）与常规表面活性剂如十六烷基三甲基氯化铵（CTACl）和十六烷基三甲基溴化铵（CTABr）之间的相互作用。通过在不同温度下的电导率测量来确定表面活性剂和PVP水溶液的临界胶束浓度（CMC），临界聚集浓度（CAC）和电离度（α）。在不存在和存在聚合物的情况下，计算表面活性剂的热力学参数（吉布斯自由能，焓和熵），并比较结果以确定抗衡离子对表面活性剂胶束化和过程能量的影响。这项工作的主要目的是阐明导致表面活性剂和聚合物之间络合的各种驱动力。静电相互作用在表面活性剂与水性体系中的聚合物或表面的结合中起主要作用。发现相互作用的强度取决于表面活性剂抗衡离子类型的性质。