Composite shaped phase change material with high stability and dielectric property as well as preparation method and application of composite shaped phase change material

• Main Authors: BIN JINSHENG, XU FEN, ZHANG SHENDAO, FENG CONG, HAN CUNHAO, SUN LIXIAN, ZHANG HUANZHI
• Format: Patent
• Language: Chinese; English
• Published: 03.03.2023
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a composite shaped phase change material with high stability and dielectric property, which is prepared by taking PEG8000, MDI, POSS (Polyhedral Oligomeric Silsesquioxane) and DMF (Dimethyl Formamide) as raw materials, firstly grafting the PEG8000 and a chain extender MDI to obtain a matrix material prepolymer polyurethane, and then introducing the POSS to prepare the composite shaped phase change material with high stability and dielectric property. Wherein the PEG8000 is used as a phase change material to provide phase change energy storage performance; the POSS is used as a supporting material and a dielectric material, so that the dielectric property of the material is provided, and the thermal stability is improved; mDI is used as a chain extender and provides a grafting effect. The microstructure of the composite phase-change material is that spherical POSS is uniformly distributed on the surface of the composite phase-change material, holes exist on the surface of the material,