TY - JOUR
T1 - Hydrogen peroxide sol–gel coating of microencapsulated phase change materials by metal oxides
AU - Mikhaylov, Alexey A.
AU - Medvedev, Alexander G.
AU - Grishanov, Dmitry A.
AU - Sladkevich, Sergey
AU - Xu, Zhichuan J.
AU - Sakharov, Konstantin A.
AU - Meker, Sigalit
AU - Prikhodchenko, Petr V.
AU - Lev, Ovadia
N1 - Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - 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.].
AB - 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.].
KW - Antimony oxide
KW - Heat storage
KW - Hydrogen peroxide sol–gel
KW - Metal oxide coating
KW - Phase change materials
KW - Tin oxide
UR - http://www.scopus.com/inward/record.url?scp=85086153819&partnerID=8YFLogxK
U2 - 10.1007/s10971-020-05327-7
DO - 10.1007/s10971-020-05327-7
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AN - SCOPUS:85086153819
SN - 0928-0707
VL - 95
SP - 649
EP - 660
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 3
ER -