Instrumentation, Techniques, and Measurement

Photochromic cross-link polymer for color changing and sensing surface

[+] Author Affiliations
Richard Fu, Jianmin Shi, Eric Forsythe, Merric Srour

U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783-1138, United States

Opt. Eng. 55(12), 124105 (Dec 20, 2016). doi:10.1117/1.OE.55.12.124105
History: Received August 18, 2016; Accepted November 22, 2016
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Abstract.  Photochromic cross-link polymers were developed using patented ultraviolet (UV) photoinitiator and commercial photochromic dyes. The photochromic dyes have been characterized by measuring absorbance before and after UV activation using UV-visible (Vis) spectrometry with varying activation intensities and wavelengths. Photochromic cross-link polymers were characterized by a dynamic xenon and UV light activation and fading system. The curing processes on cloth were established and tested to obtain effective photochromic responses. Both PulseForge photonic curing and PulseForge plus heat surface curing processes had much better photochromic responses (18% to 19%, 16% to 25%, respectively) than the xenon lamp treatment (8%). The newly developed photochromic cross-link polymer showed remarkable coloration contrasts and fast and comparable coloration and fading rates. Those intelligent, controlled color changing and sensing capabilities will be used on flexible and “drapeable” surfaces, which will incorporate ultra-low power sensors, sensor indicators, and identifiers.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Richard Fu ; Jianmin Shi ; Eric Forsythe and Merric Srour
"Photochromic cross-link polymer for color changing and sensing surface", Opt. Eng. 55(12), 124105 (Dec 20, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.124105


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