摘要：In this study, new microencapsulated phase change material, with organic composite phase change as the core material and polymethylmethacrylate as the shell, was prepared by in situ interfacial polymerization reaction. The surface morphology of the formed microcapsule was observed by scanning electron microscopy, and its phase change temperature and phase change heat were measured by differential scanning calorimetry. The results of this study indicate that the mean diameter is in the range 2–3 µm, with a uniform size distribution, and the phase change temperature and enthalpy of microencapsulated phase change material are of 26.2°C and 139.68 J/g, respectively. The prepared microcapsule was mixed with ordinary paint in a 1:1 ratio for performing the comparative tests in two rooms with the same dimension and settings. The results indicated that with the introduction of a 2- to 3-mm-thick coating containing microencapsulated phase change material the temperature amplitude decreased by 5°C–6°C. The power monitoring results for the period of the highest temperature in 1 day indicated that the start-up time of air conditioner significantly decreased, thus saving about 26% electric consumption.
关键词：Microencapsulated phase change material; change coating; temperature response
