Hydrogen peroxide sol–gel coating of microencapsulated phase change materials by metal oxides

Alexey A. Mikhaylov, Alexander G. Medvedev, Dmitry A. Grishanov, Sergey Sladkevich, Zhichuan J. Xu, Konstantin A. Sakharov, Sigalit Meker, Petr V. Prikhodchenko*, Ovadia Lev*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Abstract: Hydrogen peroxide assisted sol–gel coating of core-shell microcapsules of phase change materials (PCMs) is reported. A doubly coated paraffin core with an inner poly(melamine-formaldehyde) shell and an outer coating of peroxostannate, peroxoantimonate, their mixture or the respective metal oxides are reported. Triple coating of the paraffin core with a poly(melamine-formaldehyde) inner shell, tin oxide middle layer and graphene oxide outer coating is also achieved by hydrogen peroxide sol–gel processing. The latent heats of the microencapsulated PCMs ranged between 122 and 192 J g−1. The sol–gel process involves stabilization of the peroxostannate or peroxoantimonate sol in basic aqueous hydrogen peroxide and subsequent destabilization and deposition of the sol by addition of an antisolvent. Transformation to the metal oxide coating is conducted by chemical reduction with sodium sulfite or by mild heat treatment without leakage of the paraffin core. [Figure not available: see fulltext.].

Original languageAmerican English
Pages (from-to)649-660
Number of pages12
JournalJournal of Sol-Gel Science and Technology
Volume95
Issue number3
DOIs
StatePublished - 1 Sep 2020

Bibliographical note

Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Keywords

  • Antimony oxide
  • Heat storage
  • Hydrogen peroxide sol–gel
  • Metal oxide coating
  • Phase change materials
  • Tin oxide

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