title: Synthesis of a paraffin phase change material microencapsulated in a siloxane polymer.
abstract: The coemulsification method suitable for the formulation of microcapsules ofn-eicosane coated with a polysiloxane is developed. This method allows to synthesize core-shell microcapsules of paraffin which have the shape of spheres or distorted spheres and are designed for the use as phase change materials. The microcapsules are formed in aqueous phase by the precipitation ofn-eicosane together with modified polyhydromethylsiloxane from a common solvent which is miscible with aqueous media. The polysiloxane is modified by the attachment of silylvinyl and alkoxy functions before coemulsification with the paraffin. It also contains the Pt(0) Karstedt catalyst. The microcapsules formed by coemulsification are stabilized by the in situ cross-linking of the polysiloxane shell. The shell is additionally modified by the in situ generation of silanol groups which provide colloidal stabilization of microspheres in aqueous phase. Microcapsules were studied by DSC, SEM, optical polarized microscope, and by thermooptical analysis (TOA).
authors: Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland.
authors: Witold
authors: W
authors: Fortuniak
authors: Stanislaw
authors: S
authors: Slomkowski
authors: Julian
authors: J
authors: Chojnowski
authors: Jan
authors: J
authors: Kurjata
authors: Adam
authors: A
authors: Tracz
authors: Urszula
authors: U
authors: Mizerska
keywords: Karstedt catalyst; Microcapsules; Microencapsulated phase change materials; Microencapsulation; PCM microcapsules; Polyhydromethylsiloxane