Honors College Thesis
 

Dynamic Surface Tension on the Microsecond Timescale : Thermal Inkjet Printing Applications

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https://ir.library.oregonstate.edu/concern/honors_college_theses/vx021g85c

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  • This project explores the relationship between microsecond-timescale dynamic surface tension (DST) and measurable thermal inkjet printing parameters. Dynamic surface tension affects many aspects of printing, including printing speed and ink drop shape. In addition to this, DST is a physical input parameter for HP’s in-house computational fluid dynamics program. HP does not currently have a way to measure DST on the 10-microsecond timescale. The relationship between DST and measurable firing parameters has not been previously investigated within HP. The knowledge gained from this project could lead to a new, innovative way to predict microsecond-timescale DST. This project had two objectives. The first was to establish the relationship between dynamic surface tension and measurable pen fluid refill parameters. The second was to test the hypothesis that microsecond timescale DST is correlated to measurable firing frequency parameters of a fluid and can be used to predict dynamic surface tension on the 10-microsecond timescale. A series of calibration fluids with known surface tensions and viscosities was created. Turn-on energy and frequency response were tested using HP Inc. (Corvallis) baseline data tools. Experimental results suggest that F1ss was logarithmically correlated to dynamic surface tension. Key Words: dynamic surface tension, DST, surface tension, thermal inkjet, printing performance, surface tension measurement, microsecond surface tension
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