蓄热调温石蜡／P(MMA-CO-AA)相变微胶囊的制备及性能研究

Preparation and properties of thermal energy storage and temperature regulation microcapsulated paraffin by P(MMA-co-AA)

采用界面聚合法制备了石蜡/P(MMA-co-AA)的相变储热微胶囊。采用光学显微镜、FT-IR、DSC、TGA、紫外分光光度计等对微胶囊进行了测试与表征。着重研究了芯壁比对热性能及渗透性能的影响,并对储热调温效果进行了评价。结果表明,微胶囊呈规则的球形,平均粒径为32μm,具有良好的热稳定性,相变温度为60℃,相变潜热为64.2 J/g,储热密度为168.2 kJ/kg;在无水乙醇、丙酮中稳定,能被苯、四氯化碳等破坏;耐酸碱性强;耐久性好;调温效果明显,可应用于建筑领域。

Microencapsulated paraffin with P（MMA-co-AA） as shell for phase change microcapsules were prepared by interracial polymerization. The structure and properties of the microcapsules were characterized and in- vestigated by using optical microscope（OM）, Fourier transform infrared（FT IR）, differential scanning calorimetry（DSC） , thermo gravimetry analysis（TGA） and ultraviolet spectrophotometer. The thermal properties and permeability properties of different ratio of core to wall were focused on and the effect on storage heat was evaluated. The results indicated that the microcapsules with average size 32μm are spherical. It has good thermal stability. The microeapsules with phase transition temperature 60℃ , latent heat 64.2J/g and heat storage density of 168.24 kJ/kg were prepared. It is stable in ethanol and acetone while be damaged in benzene and carbon tetrachloride. It has good durability in strong acid and strong alkaline solution. The temperature regulation effect is obvious. It can be used in construction sector.