论文部分内容阅读
报道了由gemini表面活性剂乙烷基-α,ω-双十四烷基二甲基溴化铵(14-2-14)产生的高稳定泡沫体系.泡沫塌陷到初始高度一半所对应的时间(t1/2)用来表征泡沫的稳定性.测得14-2-14体系的t1/2高达961min,远大于乙烷基-α,ω-双十二烷基二甲基溴化铵(12-2-12)产生泡沫的t1/2(754min),表明带有一根短联接链和两条长尾链的gemini表面活性剂是高效的泡沫稳定剂.为了揭示界面弹性与泡沫稳定性之间的关联,测量了表面活性剂吸附膜的扩张流变行为.在指定的表面过剩量下,吸附膜的高频极限弹性再一次被发现与泡沫稳定性相关,较大的极限弹性很好地对应更加稳定的泡沫.
Reported a highly stable foam system produced by the gemini surfactant Ethyl-α, ω-ditetradecyldimethylammonium bromide (14-2-14). The collapse of the foam to half the initial height corresponds to the time (t1 / 2) was used to characterize the stability of the foam.The measured t1 / 2 of the 14-2-14 system was as high as 961 min, much larger than that of the ethyl-α, ω-didodecyldimethylammonium bromide 12-2-12) produced a foam of t1 / 2 (754 min), indicating that with a short link and two long chain gemini surfactant is a highly efficient foam stabilizer.In order to reveal the interface and foam stability foam stability , The rheological behavior of surfactant adsorbed membranes was measured. Under the specified surface excess, the high-frequency ultimate elasticity of the adsorbed membranes was again found to be associated with the foam stability with greater ultimate resilience Corresponds to a more stable foam.