化工学报2025，Vol.76Issue(8)：4185-4193,9.DOI:10.11949/0438-1157.20250018
基于振荡座滴测定液滴表面张力的方法
Determination of surface tension via oscillating sessile drop method
摘要
Abstract
Surface tension is an important physical property parameter of liquid,one of the key factors affecting various chemical reactions and biological reactions,and an essential basic physical property parameter in chemical engineering calculations.The oscillating sessile drop method is a highly precise and sensitive technique for measuring the surface tension of liquids.To discuss the effectiveness and influencing factors in measuring liquid surface tension using the oscillating sessile drops method,distilled water,ethanol and glycol used as experimental objects at 20℃,and stainless-steel needles with different outer diameters used to drop droplets on the polyethylene terephthalate(PET)substrate,the oscillation behaviour of droplets was recorded by high-speed camera,and the frequency spectrum was analyzed.The experimental results show that although the surface tension calculated based on Rayleigh equation is generally higher than that measured by traditional pendant-drop method,there is a linear relationship between oscillation frequency and droplet volume.In addition,the experiment also verified the influence of different image acquisition frame rates on the spectrum analysis results.The research shows that the oscillating sessile drop method is a potential measurement method,especially suitable for measuring the surface tension of metallurgical melt at high temperatures.However,the surface tension calculated by this method is still higher than the standard value,which suggests that the model needs to be further optimized to improve the measurement accuracy.关键词
振荡/悬滴法/润湿性/表面张力Key words
oscillation/pendant-drop method/wettability/surface tension分类
化学化工引用本文复制引用
周玉祥,林巧力..基于振荡座滴测定液滴表面张力的方法[J].化工学报,2025,76(8):4185-4193,9.基金项目
国家自然科学基金项目(52461009,52165044) （52461009,52165044）
