“…6 In the past studies, numerous microcapsules with various polymer shell materials had already developed by following mature encapsulation technologies: the interfacial polycondensation, in-situ polymerization, and suspension polymerization pathways. [7][8][9] In addition, some common polymers shell materials comprise polystyrene, 10 polyurea-formaldehyde resin, 11 melamine-formaldehyde resin, 12 polyurethane, 13 and poly (butyl acrylate). 14 Although the polymer shell has high compatibility with PCMs and is simple to operate, it has not been widely used as a result of some main problems such as poor thermal conductivity, lack of rigidity, and flammability.…”