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http://dx.doi.org/10.12925/jkocs.2015.32.2.215

Preparation of Monodispersed Silica-Rubitherm®Microparticles Using Membrane Emulsification and Their Latent Heat Properties  

Kim, Soo-Yeon (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Jung, Yeon-Seok (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Lee, Sun-Ho (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
You, Jin-Oh (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Youm, Kyung-Ho (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.32, no.2, 2015 , pp. 215-225 More about this Journal
Abstract
Recently, the importance of energy saving and alternative energy is significantly increasing due to energy depletion and the phase change material (PCM) research for saving energy is also actively investigating. In this research, the membrane emulsification using SPG membrane was used to make various microencapsulated phase change material (MPCM) particles which were comprised of $Rubitherms^{(R)}$ (RT-21 and RT-24) core and silica coating. We investigated the pressure of the dispersion phase, the concentration of surfactant, and the ratio of $Rubitherm^{(R)}$ and silica to prepare various MPCM particles. The DSC and TGA were used to examine the heat stability and latent heat properties. Also, PSA, SEM, and optical microscopy were used to confirm the size of $Rubitherm^{(R)}$ particles and the thickness of silica shell. The average of particle size was $7-8{\mu}m$. And, FT-IR was also used to enforce the qualitative analysis. Finally, the MPCM particles obtained from membrane emulsification showed monodispersed size distribution and the heat stability and latent heat were kept up to 80% compared to pure $Rubitherm^{(R)}$. So, it can be effectively used for wallpaper, buildings and interior products for energy saving as PCMs.
Keywords
phase change materials; membrane emulsification; $Rubitherm^{(R)}$; silica; interfacial polymerization; energy saving wallpaper;
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