Synthesis of monolithic shape-stabilized phase change materials with high mechanical stability <i>via</i> a porogen-assisted <i>in situ</i> sol–gel process
Felix Marske, Juliana Martins de Souza e Silva, Ralf B. Wehrspohn, Thomas Hahn, Dirk Enke
Abstract
, without losing melting or freezing enthalpies. We analyzed the silica structure in the ss-PCMs to understand in detail the reasons for the high mechanical stability. The silica structure in ss-PCMs consists of spherical meso- and macropores up to 10 000 nm filled with PCM, formed mostly by BS droplets in water as templates during gelation. With an increasing BS amount in the synthesis of ss-PCMs, the total nanopore volume filled with PCM in ss-PCMs increases, resulting in higher compressive strengths up to 500% and thermal conductivities up to 60%.
Topics & Concepts
Materials scienceSupercoolingThermal stabilityThermal energy storageComposite materialChemical engineeringThermodynamicsEcologyBiologyEngineeringPhysicsPhase Change Materials ResearchAdsorption and Cooling SystemsPolymer composites and self-healing