肥皂膜过滤器的性能探究

Probe into the performance of soap membrane filter

物质分离是很多医疗和工业的核心技术.传统的固体过滤膜可以允许小于临界尺寸的粒子通过而阻挡大的粒子透过.然而,允许大粒子通过而小粒子停留的膜却很难人工制造.Birgitt Boschitsch Stogin、Luke Gockowski等人证明了完全由液体组成的液膜可以被设计成保留小于临界尺寸粒子而透过大尺寸粒子的过滤膜.基于上述研究,本文在液膜过滤器模型基础上进行解析推导,分析讨论了液膜的临界透过条件,并在实验中得到验证.同时,本文通过调节液膜表面张力系数实现了对粒子速度的筛选.

Material separation is the core technology of many medical and industrial applications.Traditional solid filtration membranes can allow particles smaller than the critical size to pass through the membrane while blocking the passage of larger particles.However, membranes that allow large particles to pass through while small particles stay are difficult to make artificially.Stogin, Gockowski, et al(in Sci.Adv.2018,4:3276) proved that a liquid membrane composed entirely of liquid can be designed to retain particles smaller than the critical size and permeate large-size particles.Based on the above research, this article analyzes and derives based on the liquid membrane filter model, analyzes and discusses the critical permeability conditions of the liquid membrane, and is verified in the experiment.At the same time, this article realizes the screening of particle velocity by adjusting the surface tension coefficient of the liquid membrane.