Interaction of α-Cyclodextrin with α,β-Ethcidene Dihexadecycdimethyl Ammonium Bromide
The critical micelle concentration(0.428～0.470 mmol/L)of gemini surfactants of α,β-ethylene dihexade-cyldimethylammonium bromide were determined by surface tension method at 25℃,35℃ and 45℃,the thermodynamic pa-rameters of micellization were evaluated.The experimental results showed that the micelle formation process was a spontaneous process driven by entropy.The inclusion action of α-Cyclodextrin with α,β-ethylene-dicetyldimethylammonium bromide in aqueous solation were investigated.The inclusion ratio of α-Cyclodextrin with α,β-ethylene-dicetyldimethylammonium bro-mide were2:1 or 4:1.There are two kinds of inclusion compounds with different inclusion ratios in the system.According to the thermodynamic parameters of the inclusion process,it shows that the process is a spontaneous process of exothermic and an en-tropy increase process.
α-Cyclodextrinα,β-ethylene cetyldimethylammoniumbromidesurfacetensioninclusion ratio
万方数据
维普
