Abstract
A way to benefit from the favorable attributes of both organic microencapsulation, including the hermetic sealing of the organic phase change material (PCM) core, and inorganic microencapsulation, including dispersibility in aqueous and polar solvents and improved thermal conductivity, is outlined. The approach is demonstrated by uniformly coating organic polymer encapsulated PCMs with zinc oxide, which allows thermal percolation through the interconnected inorganic shells. It is demonstrated that hydrogen peroxide sol–gel processing can be used to form such uniform zinc peroxide coatings which are then converted by chemical treatment to zinc oxide shells. The way to overcome different challenges associated with the synthesis of thin film coatings of organic PCMs by zinc oxide are addressed, and the favorable attributes of the new doubly coated PCM capsules are demonstrated.
Original language | American English |
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Article number | 1900368 |
Journal | Advanced Materials Interfaces |
Volume | 6 |
Issue number | 12 |
DOIs | |
State | Published - 21 Jun 2019 |
Bibliographical note
Funding Information:This research was supported by a grant from the National Research Foundation, Prime Minister Office, Singapore under its Campus of Research Excellence and Technological Enterprise (CREATE) programme. The financial support of the Ministry of Science is thankfully acknowledged. The authors thank the Harvey M. Krueger Family Centre for Nanoscience and Nanotechnology of the Hebrew University of Jerusalem and the Israel Science Foundation. The zinc peroxide deposition was supported by the Russian Science Foundation (No.17-73-10482). CHNS-analysis was performed at the User Facilities Center of IGIC RAS within the State Assignment on Fundamental Research to the Kurnakov Institute of General and Inorganic Chemistry. We appreciate Ivan Karpov’s help in preparing the images.
Funding Information:
This research was supported by a grant from the National Research Foundation, Prime Minister Office, Singapore under its Campus of Research Excellence and Technological Enterprise (CREATE) programme. The financial support of the Ministry of Science is thankfully acknowledged. The authors thank the Harvey M. Krueger Family Centre for Nanoscience and Nanotechnology of the Hebrew University of Jerusalem and the Israel Science Foundation. The zinc peroxide deposition was supported by the Russian Science Foundation (No. 17-73-10482). CHNS-analysis was performed at the User Facilities Center of IGIC RAS within the State Assignment on Fundamental Research to the Kurnakov Institute of General and Inorganic Chemistry. We appreciate Ivan Karpov's help in preparing the images.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords
- phase change materials
- thermal conductivity
- zinc oxide