羧甲基纤维素钠对十六烷基三甲基溴化铵水溶液聚集行为的影响。
Influence of sodium carboxymethylcellulose on the aggregation behavior of aqueous 1-hexadecyl-3-methylimidazolium chloride solutions.
机构信息
Department of Chemistry, Presidency University, 86/1 College Street, Kolkata 700 073, India.
Department of Chemistry, Presidency University, 86/1 College Street, Kolkata 700 073, India.
出版信息
Carbohydr Polym. 2014 Nov 26;113:208-16. doi: 10.1016/j.carbpol.2014.07.002. Epub 2014 Jul 17.
The influence of sodium carboxymethylcellulose (NaCMC) on the aggregation phenomena of a surface active ionic liquid 1-hexadecyl-3-methylimidazolium chloride (C16MeImCl) was studied in aqueous solutions using electrical conductivity and surface tension measurements. The counterion condensation behavior of NaCMC (aq) and the premicellar ion-association behavior of C16MeImCl (aq) were also investigated. Two characteristic concentrations, namely the critical aggregation concentration and polymer saturation concentration, before free C16MeImCl micelles appear in C16MeImCl-NaCMC solutions have been identified. Effects of temperature, NaCMC concentration, and the charge density parameter of NaCMC on the self-aggregation of the C16MeImCl have been discussed to elucidate C16MeImCl-NaCMC interactions. The thermodynamic parameters for micellization of C16MeImCl were estimated both in absence and in the presence of NaCMC. The observed enthalpy-entropy compensation effect in C16MeImCl and C16MeImCl-NaCMC systems provided important insight as to how micellization processes are governed by the bulk structural property of the solution with respect to that of the water.
采用电导率和表面张力测量法研究了羧甲基纤维素钠（NaCMC）在水溶液中对表面活性离子液体 1-十六烷基-3-甲基咪唑氯（C16MeImCl）聚集现象的影响。还研究了 NaCMC（aq）的抗衡离子凝聚行为和 C16MeImCl（aq）的预胶束离子缔合行为。在自由 C16MeImCl 胶束出现之前，已经在 C16MeImCl-NaCMC 溶液中确定了两个特征浓度，即临界聚集浓度和聚合物饱和浓度。讨论了温度、NaCMC 浓度和 NaCMC 的电荷密度参数对 C16MeImCl 自聚集的影响，以阐明 C16MeImCl-NaCMC 相互作用。分别在没有和有 NaCMC 的情况下估算了 C16MeImCl 的胶束化热力学参数。在 C16MeImCl 和 C16MeImCl-NaCMC 体系中观察到的焓熵补偿效应提供了重要的见解，说明了胶束化过程如何受溶液的整体结构性质相对于水的性质的控制。
Zotero 插件