【摘要】 用微量量热法研究了丁二酸二异辛酯磺酸钠(AOT)在N,N-二甲基甲酰胺(DMF)/长链醇(正戊醇、正己醇、正庚醇、正辛醇)体系中的临界胶束浓度(CMC)和热力学函数(△Hmθ,△G mθ和△Smθ).并分析讨论了醇的浓度、醇中的碳原子数及温度与CMC及热力学参数之间的关系.结果表明,在AOT/长链醇/DMF体系中,当醇中的碳原子数相同且醇的浓度相同时,CMC,△H mθ,△Smθ随温度的升高而增大,而·G mθ随温度的升高而降低;当温度相同且醇中的碳原子数相同时,CMC,△Hmθ,△G mθ和△Smθ随醇浓度的增加都降低;而当温度相同且醇的浓度相同时,CMC,△H mθ,△G mθ和△Smθ随醇中碳原子数的增加都降低.更多还原

【Abstract】 The critical micelle concentration(CMC) and thermodynamic function(△H mθ,△G mθ and △Smθ) of dioctyl sulfosuccinate sodium salt(AOT) in the N,N-dimethylformamide(DMF)/long-chain alcohol(n-pentanol,n-hexanol,n-heptanol,n-octanol) systems were studied using microcalorimetric method.And the relationships between alcohols’ concentrations,carbon number,temperature and CMC,thermodynamic properties were discussed.It can be concluded as follows: under the condition of the identical alcohols’ car-bon number and identical concentration of alcohols,the values of CMC, Hmθ and △Smθ increase,while the values of △G mθ decrease with the increment of the temperature.And under the identical condition of temperature and alcohol’s carbon number,all the values of CMC,△H mθ,△G mθ and △Smθ decrease with the increment of the alcohols’ concentrations.And when the temperature and alcohols’ concentrations are the same,respectively,all the values of CMC,△H mθ,△G mθ and △Smθ decrease with the increment of the alco-hols’ carbon number.更多还原