Protocol for Studying Aqueous Foams Stabilized by Surfactant Mixtures

被引:61
作者
Boos, Julia [1 ]
Drenckhan, Wiebke [2 ]
Stubenrauch, Cosima [1 ]
机构
[1] Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany
[2] Univ Paris 11, Lab Phys Solides, UMR 8502, F-91405 Orsay, France
关键词
Foams; Foamability; Foam stability; FoamScan; Bubble size; Bubble size distribution; Non-ionic surfactants; Surfactant mixtures; BUBBLE-SIZE DISTRIBUTION; NONIONIC SURFACTANTS; DRAINAGE; FLOTATION;
D O I
10.1007/s11743-012-1416-2
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Even though foams have been the subject of intensive investigations over the last decades, many important questions related to their properties remain open. This concerns in particular foams which are stabilized by mixtures of surfactants. The present study deals with the fundamental question: which are the important parameters one needs to consider if one wants to characterize foams properly? We give an answer to this question by providing a measuring protocol which we apply to well-known surfactant systems. The surfactants of choice are the two non-ionic surfactants n-dodecyl-beta-d-maltoside (beta-C(12)G(2)) and hexaethyleneglycol monododecyl ether (C12E6) as well as their 1:1 mixture. Following the suggested protocol, we generated data which allow discussion of the influence of the surfactant structure and of the composition on the time evolution of the foam volume, the liquid fraction, the bubble size and the bubble size distribution. This paper shows that different foam properties can be assigned to different surfactant structures, which is the crucial point if one wants to tailor-make surfactants for specific applications.
引用
收藏
页码:1 / 12
页数:12
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