Polyurethane rigid foam composites are prepared via in situ foaming the polyurethane prepolymer blended with microencapsulated phase change material (MEPCM) in the work. The MEPCM is composed of n‐octadecane as core material and silicon dioxide as shell material synthesized by chemical precipitation method. Fourier transformation infrared spectroscopy (FT‐IR) and X‐ray diffraction (XRD) indicate that there are no chemical reactions between core and shell of the MEPCMs, and whose average diameter is ca. 0.69 μm investigated by scanning electron microscope (SEM). The encapsulation rate of the MEPCM is up to 47.5% calculated by differential scanning calorimeter (DSC) parameters, and the decomposition temperature of the encapsulated octadecane increased by about 20°C according to the thermogravimetric analyzer (TGA) analysis. The thermal controlling ability of polyurethane rigid foam with the MEPCMs is tested by a self‐made heating and/or cooling device, and the results showed that the foamed composites presented greater than 50 J/g for the latent heat enthalpy value and a relatively constant temperature ranged from 26°C to 28°C when the MEPCMs is 50 wt%.

中文翻译：

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微囊相变材料改性聚氨酯硬质泡沫材料的制备与性能

聚氨酯硬质泡沫复合材料是通过将与微囊化相变材料（MEPCM）共混的聚氨酯预聚物原位发泡而制备的。MEPCM由正十八烷为核心材料，二氧化硅为壳层材料，是通过化学沉淀法合成的。傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）表明，MEPCM的核与壳之间没有化学反应，其平均直径约为。通过扫描电子显微镜（SEM）研究了0.69μm。通过差示扫描量热仪（DSC）参数计算，MEPCM的包封率高达47.5％，根据热重分析仪（TGA）分析，包封的十八烷的分解温度提高了约20°C。