Hygroscopic phase change composite material-A review

In order to create a suitable building heat and humidity environment with lower energy consumption, the passive temperature and humidity independent control technology is reviewed. The review has shown that the greater the moisture buffer value(MBV) of the humidity control material, the better the humidity control effect and the higher the energy saving rate. Meanwhile, phase change material (PCM) has good temperature regulation performance, and microcapsule technology can effectively improve the overall performance of the material and can also be coupled with the building structure. Afterwards, its application in building structures is summarized and analyzed, aiming to provide researchers with reference value. However, a single material is limited by its own material properties, the hygroscopic phase change composite material (HPCCM) formed by the combination of the two can fundamentally fulfill requirements of the thermal comfort of the indoor environment. It has the advantages of each material, such as the ability to adjust humidity and temperature, and has obvious energy saving effects. Finally, the properties and improvement measures of different temperature and humidity independent control technologies are analyzed and summarized, which provides a reference for designing the best HPCCM scheme to ensure that the indoor temperature and humidity are kept within the human body's comfortable range. In the future, new HPCCMs should be developed and novel evaluation indicators should be established to evaluate the application effects, performance and reusability of the materials themselves under different regional climates.