Form-Stable Phase Change Materials with Enhanced Thermal Conductivity Based on Binary Capric-Palmitic Acid and Graphite Carbon In Situ Modified Expanded Perlite
Xiaoguang Zhang, Zekun Wang, Xianjie Liu, Tengteng Shi, Fankai Lin, Yunfei Xu, Guo Chen, Wuri Zhang, Zhaohui Huang
Abstract
Phase change materials (PCMs) have broad application prospects in energy-saving buildings. Herein, this is the first report to realize the in situ modified expanded perlite (MEP) of graphitized carbon through metal catalysis-anaerobic carbonization. Simultaneously, capric-palmitic acid (CA-PA) PCMs, which possess ideal phase change enthalpy and a phase change temperature (Tpc) suitable for human life, were prepared with good temperature regulation ability in the temperature range of 20–30 °C. A series of MEP/CA-PA form-stable PCMs (FS-PCMs) based on CA-PA PCMs and MEP were prepared, and their Tpc values were suitable for human comfort and also had good heat storage/release capabilities. Also, compared with EP/CA-PA FS-PCMs, the thermal conductivity of MEP/CA-PA FS-PCMs was significantly enhanced. Overall, this work promotes the potential applications of MEP/CA-PA FS-PCMs in energy-saving buildings and provides a strategy for enhancing the thermal conductivity of FS-PCMs.