双子表面活性剂Dynol-604溶液的动态表面张力研究

Studies on the Dynamic Surface Tension of Dynol-604

通过测定双子表面活性剂 Dynol-6 0 4的动态表面张力 ( DST) ,研究了温度和浓度等对其 DST的影响 ,详细表征了 DST随时间的变化过程 ,计算了动态表面张力的各种参数 ( ti,t*,tm,R1 /2 ) .结果表明 ,其表面张力降低迅速 ,γm 值也很低 .探讨了上述参数的物理意义和变化规律 .

The dynamic surface tension(DST) of Dynol-604 was measured by using the maximum bubble pressure method. At first the curves of DST with lgt were obtained, then the parameters(t i, t *, t m, γ m) were obtained from the curves above and R 1/2 can be calculated out. The effects of the concentration of Dynol-604 and temperature on the dynamic surface tension of Dynol-604 have been investigated. The results showed that the dynamic surface activity and adsorption energy of Dynol-604 increased with the increase of temperature and their concentration, and the diffusion energy decreased with the increasing of temperature and Dynol-604 concentration. In a word, the transient and equilibrium surface activities of Dynol-604 are very high.