Fabrication and characterization of shape-stabilized phase change materials of ZIF-8/P(tetradecyl acrylate-co-hexadecyl acrylate) and prussian blue/ (tetradecyl acrylate-co-hexadecyl acrylate)

A novel strategy based on Metal-organic frameworks nanoparticles (MOFs NPs)-stabilized suspension polymerization has been achieved for the fabrication of multifunctional ZIF-8/P(TDA-co-HDA) and PB/P(TDA-co-HDA) composites. By using this technique, functional nanoparticles can be immobilized on the surface of polymer. In this paper, ZIF-8 and PB nanoparticles (NPs) were used as stabilizer for the suspension polymerization in water and ZIF-8/P(TDA-co-HDA) and PB/P(TDA-co-HDA) composites are successfully synthesized. ZIF-8/P(TDA-co-HDA) and PB/P(TDA-co-HDA) absorbed heat at 37.5℃, 39.1℃ and released it at 8.4℃, 10.1℃ with a heat storage capacity of 63 J/g, 68 J/g, respectively. The material retains its shape without any leakage at 60℃, which is much higher than that of the melting temperature of P(TDA-co-HDA). The ZIF-8/P(TDA-co-HDA) and PB/P(TDA-co-HDA) composites exhibit good crystallization behaviors and excellent thermal reliabilities after 1000 thermal cycles. The thermal properties of the ZIF-8/P(TDA-co-HDA) and PB/P(TDA-co-HDA) composites were also investigated. The novel shape-stabilized PCMs fabricated in this study have potential uses in thermal energy storage applications.