Microcapsule phase change materials Phase change materials will become liquid in the process of heat absorption. In order to meet the environment without liquid requirements, such as textile cloth, electrical appliances and mobile phones, we further developed microcapsule phase change materials. It is contained in an inert capsule called microencapsulation. By increasing the heat transfer area, microencapsulation reduces the responsiveness of PCM to the external environment, prevents the leakage of PCM when it is in liquid state, and has the advantages of stable performance and long service life, which are favored by the market.