| dc.description.abstract | Abstract
Methyl methacrylate (MMA) monomer and stearic acid were used to prepare bulk form-stable PCM and PCM microcapsules, respectively.
Bulk PCM as form stable was prepare by polymerization of MMA and EGDMA in the presence of stearic acid. The results showed that the PCM content in the bulk PCM was raised by adding crosslinker EGDMA. The maximum value of latent heat 179.1J/g was obtained by the polymerization of 4 % MMA and 6% EGDMA in the presence of 90 % stearic acid.
PCM microcapsules were prepared by emulsion polymerization of MMA, EGDMA, and polymer solution in the presence of stearic acid. 1815 and Sodium dodecyl sulfate (SDS) were used as the surfactants. The effects of the various process parameters including the concentration of polymer solution, the concentration of monomer, the polymerization temperature, the reaction time, the weight ratio of core/shell, and the weight fraction of MAA were investigated. The influence of above parameters on diameters, morphologies, and thermal energy storage/release capacities of the microcapsules were characterized by scanning electron microscope (SEM), differential scanning calorimeter (DSC).
The PCM Microcapsules were obtained at smallest particle size under1μm by adding MAA. PCM Microcapsules were obtained at highest latent heat and PCM content at stearic acid addition 80%, polymer addition 10%), ΔH=103.3J/g, PCM content 62.1%.
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