Oscillating Bubble Tensiometry: A New Method for Measuring the Kinetics of Surfactant Adsorptive-Desorptive Exchange

振荡气泡张力测定法：测量表面活性剂吸附-解吸交换动力学的新方法

• 批准号: 9210652
• 负责人: Kathleen Stebe
• 金额: $ 10万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9210652&HistoricalAwards=false
• 关键词: Oscillating; Bubble; Tensiometry; New; Method

The research suggests measuring the pressure drop across a oscillating bubble which is attached to a needle, and which is submerged in an aqueous surfactant solution. As the surface area of the bubble expands and contracts, surfactant exchanges with the surface, and this exchange can be measured from the pressure drop data trace. A theory is outlined to described the oscillating exchange, and from the measurements the surfactant rate constants can be quantified. Once obtained, the kinetic parameters can be applied to interpret the effects of surfactants on many interfacial flows.

这项研究表明，测量跨一个 振荡气泡附在针上， 浸没在表面活性剂水溶液中。 作为表面 泡沫面积扩大和收缩，表面活性剂交换 这种交换可以从 压降数据跟踪。 一个理论概述描述 振荡交换，从测量结果来看， 表面活性剂速率常数可以被量化。 一旦获得， 动力学参数可以用来解释这种效应 表面活性剂对许多界面流动的影响。