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NameMr. Addam Ben-Abdallah
Organization or InstitutionFlorida Polytechnic University
TopicPhysical Chemistry

Development of Encapsulated Thermochromic Materials for Degradation Resistant Energy Efficient Coatings


Brennan Halsey(1), Addam Ben-Abdallah(1), Daniil Ivanikov(1), Sushant Nagare(2), Marildi Hibo(2), Scott L. Wallen(3), Scott Reinhart(1), Prasanta Biswas(2), Elias Stefanakos(2), and Sesha Srinivasan(1)

Author Institution(s)

(1)Department of Engineering Physics, (3)Department of Environmental Engineering, Florida Polytechnic University, Lakeland, FL 33805. (2)Clean Energy Research Center, College of Engineering, University of South Florida, Tampa, FL 33620.


Thermochromic materials (TCMs) possess reversible color changes with respect to the increase and decrease of temperature. TCMs have two apparent phases, a light phase and a dark phase, where the light phase appears after heating and reflects more radiation, while the dark phase appears after cooling and absorbs more radiation. Their color change properties can be used to vary the throughput of visible light and solar energy for applications in windows and building surfaces. However, exposed to sunlight with a wide range of wavelengths from the UV to the near IR, TCMs often degrade and this degradation limits TCM’s potential applications, for example, in coating building exteriors and energy storage. As the TCMs degrade, there should be an observable change in both phase colors, gradually becoming more similar and less effective as light and dark phases. Encapsulation of TCMs by inorganic metal oxides, such as SiO2 and TiO2, have the potential to prevent this degradation. The goals of the project are to develop a combined solar simulator and environmentally controlled chamber to obtain realistic TCM degradation data and its dependence on irradiation wavelength, environmental temperature, and humidity. While under conditions, data points will be tracked along regular integrals throughout the TCM degradation by testing both phases as it’s cooled after exposure for each cycle of testing in the apparatus. Data presented will focus on the encapsulation technique, instrument development, and characterization of the TCMs to date.