00000cab a22000003a 4500 UP-99796217611368237 Buklod 20231008001418.0 m |o d | ta 140814s xx d | ||r ||||| || DENGII eng Pilario, Karl Ezra S. Synthesis and characterization of micro-encapsulated n-octadecade in urea-melamine-formaldehyde shell for thermal regulation Karl Ezra S. Pilario, John Gerald S. Reamillo, Noel S. Sabarillo, Angela D. Escoto. pp. 69-75 Phase change materials (PCMs) have the ability to maintain a steady temperature upon changing phase. These materials are currently used for heat storage and space cooling. This research conducted preliminary observations on the surface cooling of polyurethane foams using PCM technology. Polyurethane foam is used in car seats and pillows which can reach 60-70˚C when exposed to the sun for a certain period of time. A modified microencapsulation technique was used to synthesize a PCM with n-octadecane and urea-melamine-formaldehyde as shell and core materials, respectively. The modified technique was designed to adapt to the availability of reagents, including the time and equipment constraints in the Philippines. Differential Scanning Calorimetry revealed that the product obtained a peak melting temperature and latent heat of fusion at 34.9˚C and 190.8 j/g, respectively. A thin layer of the product was then manually applied to cover the surface of the polyurethane foam. Finally, using a Data Logger, temperature profiling of the surfaces was done as they were exposed to a heated environment. Results showed that the temperature profiles of the pure microencapsulated PCM were lower than the foam surface and ambient temperature by margins of 3.56˚C and 1.00˚C, respectively. Phase change materials (PCMs). N-octadecane. Urea-melamine-formaldehyde. Reamillo, John Gerald S. Sabarillo, Noel S. Escoto, Angela D. Philippine Engineering Journal 33, 1(2 copies) (2012(Je)). Also available online for University of the Philippines Diliman. Click here https://journals.upd.edu.ph/index.php/pej/article/view/3656 (viewed 13 January 2022) FI Article