Abstract
In this study, a series of different mass of polyvinyl alcohol (PVA) modified microcapsules were synthesized through in-situ polymerization, where the bio-based n-dodecanol was selected as phase change material cores. The surface morphology, microstructure, thermal properties as well as impermeability were systematically characterized with field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM) and differential scanning calorimeter (DSC), respectively. The formation mechanism of microencapsulation and phase change behavior were investigated as well. And these effects of PVA on morphology, microstructure, thermal properties, particles size and distribution of microencapsulated n-dodecanol were also discussed. With the increase of PVA employed, the morphology of microcapsules changed apparently, and both the distribution and particles size of microcapsules decreased. The impermeability test results showed that impermeability of microencapsulated n-dodecanol enhanced after PVA modification, and the influence of PVA amount on impermeability enhancement of microcapsules was studied in this paper.
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