Journal
THERMOCHIMICA ACTA
Volume 551, Issue -, Pages 136-144Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2012.10.027
Keywords
Phase change material; Microencapsulation; Thermal properties; n-Butyl methacrylate; Butyl acrylate; Energy storage
Funding
- International Collaboration Project [2008DFA51210]
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Microencapsulation of n-octadecane with crosslinked p(butyl methacrylate) (PBMA) and p(butyl acrylate) (PBA) as shells for thermal energy storage was carried out by a suspension-like polymerization. Divinylbenzene (DVB) and pentaerythritol triacrylate (PETA) were employed as crosslinking agents. The surface morphologies of the microencapsulated phase change materials (microPCMs) were studied by scanning electron microscopy (SEM). Thermal properties, thermal reliabilities and thermal stabilities of the as-prepared microPCMs were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The microPCMs prepared by using DVB exhibit greater heat capacities and higher thermal stabilities compared with those prepared by using PETA. The thermal resistant temperature of the microPCM with BMA DVB polymer was up to 248 degrees C. The phase change temperatures and latent heats of all the as-prepared microcapsules varied little after 1000 thermal cycles. (C) 2012 Elsevier B.V. All rights reserved.
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