CAJ | 학술논문

用旋转滴法测定了N，N’-二烷基-N，N，N’，N’-四甲基二胺二氯化物（G12NCl2）水溶液与正癸烷之间的动态界面张力（DIFT），考察了表面活性荆G12NCl2的浓度对水一正癸烷体系动态界面张力的影响．结果表明：当G12NCl2浓度低于cmc时，浓度越大，DIFT曲线越低，界面张力随时间的变化趋势越缓，达到平衡的时间越短．当浓度达到或者高于cmc时，DIFT曲线几乎水平．根据DIFT曲线，得到了不同温度下水-正癸烷体系中G12NCl2的cmc，该数据显著低于在水一空气体系中的cmc．
용선전적법측정료N，N’-이완기-N，N，N’，N’-사갑기이알이록화물（G12NCl2）수용액여정계완지간적동태계면장력（DIFT），고찰료표면활성형G12NCl2적농도대수일정계완체계동태계면장력적영향．결과표명：당G12NCl2농도저우cmc시，농도월대，DIFT곡선월저，계면장력수시간적변화추세월완，체도평형적시간월단．당농도체도혹자고우cmc시，DIFT곡선궤호수평．근거DIFT곡선，득도료불동온도하수-정계완체계중G12NCl2적cmc，해수거현저저우재수일공기체계중적cmc．
The dynamic interracial tension （DIFT） of N,N＇-didodecyl-2-hydroxyl-N,N,N＇ ,N＇-tet- ramethyl dichloride （G12 NCl2） and n-decane system was measured by spinning drop method and the effect of surfactant concentration on the dynamic interfacial tension was investigated. The results show that, when the surfactant concentration is lower than cmc, the higher the concentration of surfactant is, the lower will be the curve of the DIFT,the slower will be the changing trend of DIFT, and the shorter will be the equilibrium time. When the surfactant concentration is above the crnc,the value of DIFT does not change basically with the time. Through the curves of DIFT,the cmc of G12NCl2 in water-decane sys- tem in different temperature is obtained and the cmc is much lower than that in water-air system.