Investigation of thin liquid films of small diameters and high capillary pressures by a miniaturized cell
Investigation of thin liquid films of small diameters and high capillary pressures by a miniaturized cell
复制标题
通过小型化池研究小直径和高毛细管压力的薄液膜
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
R. Borwankar
中科院分区：
文献类型：
--
作者：
O. Velev;G. Constantinides;D. G. Avraam;A. C. Payatakes;R. Borwankar
建立了一种用于泡沫和乳胶膜实验研究的高度小型化的反应池。在新的设计中，结构的小型化是通过用准分子激光钻孔并烧结成单一结构的薄玻璃玻片形成电池来实现的。在我们的电池类型中可以获得的毛细管压力和膜尺寸比目前部署的模型中的那些更接近实际。对非离子表面活性剂(Tween20)和蛋白质(BSA)稳定的乳胶膜的形成和减薄进行了对比实验。论文中报道的数据显示，两个细胞中的薄膜演化模式和时间尺度明显不同。在现实主义电影中没有观察到酒窝的形成。在蛋白质稳定的体系中，时间尺度上的差异尤其显著，这可能是由于界面粘度和弹性的增加造成的。
A highly miniaturized cell for the experimental investigation of thin foam and emulsion films has been constructed. The miniaturization of the structure in the new design is achieved by forming the cell out of thin glass slides drilled by excimer laser and sintered into a single structure. The capillary pressures and film dimensions attainable in our type of cell are closer to reality than those in the currently deployed models. Parallel experiments on the formation and thinning of emulsion films stabilized with nonionic surfactant (Tween 20) and with protein (BSA) have been carried out in the newly designed and in the conventional cell. The data reported in the paper show that the patterns and the time scales of film evolution in the two cells are significantly different. No dimple formation in the realistic films has been observed. A particularly drastic difference in the time scales is recorded in the case of protein-stabilized systems, probably resulting from the increased interfacial viscosity and elasticity.