Measuring Contact Angle and Constructing Zisman Plot [Surface and Colloid Science]
We discussed the theory of Wilhelmy method for measuring surface tension force, which allows the calculation of perimeter, surface tension, or contact angle, if we we given two of them. We also discussed the critical surface tension of a low-energy solid, which can be determined using the Zisman plot by measuring contact angle between the solid of interest and probe liquids of varying surface tensions.
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Course: CHEM E 455 Surface and Colloid Science Laboratory (Spring 2023)
Course Instructor: Dr. John C. Berg, University of Washington
Video Instructor: Teng-Jui Lin, undergraduate teaching assistant
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Video notes and slides available on GitHub: https://github.com/tengjuilin/video-n...
Equation sheets available on GitHub: https://github.com/tengjuilin/equatio...
Course notes available on GitHub: https://github.com/tengjuilin/course-...
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References:
Berg, J. C. (2009). Introduction To Interfaces And Colloids, An: The Bridge To Nanoscience (Illustrated edition). WSPC.
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%%% CHAPTERS %%%
00:00 Intro
00:12 Partial immersion method
01:48 Contact angle measurement
03:58 Young's equation
08:03 Zisman plot
11:28 Experimental objectives