High Temperature Maximum Bubble Pressure Tensiometer

Author: Matthew Moses

Field of Study: Mechanical Engineering

Faculty Mentors: Jingzhou Zhao

Easel: 54

Timeslot: Midday

Abstract: The objective of this project was to design and implement a method for measuring the interfacial energy between two liquids at elevated temperatures. Understanding interfacial interactions is essential for applications such as microfluidics and the development of encapsulated particles for thermal energy storage, flexible electronics, and soft robotics. The measurement technique is based on the Maximum Bubble Pressure Method, which relates the maximum pressure within a forming bubble to the interfacial energy without requiring direct observation. The apparatus provides control over positioning, temperature, and gas flow. Experimental data, including pressure, flow rate, and temperature, are recorded and analyzed to determine interfacial energy. The system enables rapid, repeatable, and cost-effective measurement of liquid–liquid interfacial energy under elevated temperature conditions.