Microencapsulated phase change materials (MicroPCMs) can be incorporated into a traditional thermal insulation material, such as a foam, to form a new temperature-adaptable material. Polyurea/polyurethane (PU) as the encapsulating shell makes the MicroPCMs more compatible with the polyurethane foam matrix. This study focuses on increasing the thermal storage abilities and reliabilities of the PU-based MicroPCMs as well as improving the temperature-regulating properties of PU foams treated with these materials by incorporating lauryl methacrylate (LMA) and polyols into the MicroPCM particles. Paraffin was successfully microencapsulated by a PU/PLMA hybrid shell via staged polymerization of jointly using interfacial and suspension-like polymerization. PU foams integrating the as-prepared MicroPCMs were produced. The thermal storage abilities as well as working reliabilities of the MicroPCMs were improved when PLMA was introduced in the shells and were further enhanced when they were modified by polyols. The PU foams containing MicroPCMs with polyol-modified hybrid shells have better mechanical properties and temperature-regulating properties than do the foams containing MicroPCMs with unmodified shells. In conclusion, MicroPCMs with polyol-modified PU/PLMA hybrid shells possess promising application prospects for energy efficient buildings and advanced cold-chain logistics systems.
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