CnNCl和SDS在水溶液中的相互作用

CnNCl和SDS在水溶液中的相互作用;滴定式微量热法; 烷氧基羟丙基三甲基氯化铵; 十二烷基硫酸钠;胶束;疏水作用

Interaction Between Sodium Dodecyl Sulfate and 3-Alkoxyl-2-hydroxypropyl Trimethyl Ammonium Chloride in Aqueous Systems

The interaction between sodium dodecyl sulfate(SDS) and 3-alkoxyl-2-hydroxypropyl trimethyl (ammonium) chloride(C_(n)NCl) in aqueous systems was investigated by means of microcalorimetric titration. The pseudo-critical micellar concentration(pcmc) and thermodynamic parameters for the formation of the micelle of each (mixture) surfactant system were estimated from the calorimetric data and the titration curve. The formation enthalpy and entropy of the mixture micelle are discussed based on the structure of the (surfactant) using the (iceberg) model. The results show that the interaction between the hydrophobic chains of the SDS and the (C_(n)NCl) is more important than the mutual electrostatic attraction between the negatively charged end group of SDS and the positively charged end of C_(n)NCl in the synergistic interaction between the anionic and cationic (surfactants).