ZIF-8/丙烯酸十四-十六酯共聚物和PB/丙烯酸十四-十六酯共聚物形状稳定相变材料的制备与性能

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)

形状稳定的相变材料(SPCMs)是绿色的可重复使用的储能材料。由于丙烯酸正烷基酯共聚物的熔融温度可通过控制侧链长度来调节,因此可以得到适宜的相变温度。用一种基于金属-有机骨架纳米粒子稳定悬浮聚合法制备出了功能MOFs/聚合物复合材料-ZIF-8/丙烯酸十四-十六酯共聚物(ZIF-8/P(TDA-co-HDA))与PB/丙烯酸十四-十六酯共聚物(PB/P(TDA-co-HDA)),通过使用此技术,可以将功能性纳米颗粒固定在聚合物表面上,ZIF-8和PB起到形状稳定的作用。ZIF-8/P(TDA-co-HDA)的吸放热温度分别为37.5℃和8.4℃,相变焓值为63 J/g,PB/P(TDA-co-HDA)在39.1℃吸热,10.1℃放热,相变焓值为68 J/g。该种材料在60℃时保持其形状没有任何泄漏,这远高于P(TDA-co-HDA)的熔融温度。在1000个热循环后,ZIF-8/P(TDA-coHDA)和PB/P(TDA-co-HDA)仍表现出良好的结晶行为和热可靠性。制备的新型形状稳定相变材料在热能存储应用中具有潜在的用途。

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-coHDA)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-coHDA)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-coHDA)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.