Crystallohydrate Loaded Halloysite Nanocontainers for Thermal Energy Storage

Zhu, X and Shchukin, D ORCID: 0000-0002-2936-804X
(2018) Crystallohydrate Loaded Halloysite Nanocontainers for Thermal Energy Storage. Advanced Engineering Materials, 20 (11). p. 1800618.

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© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The mixture of crystallohydrate phase change materials (PCMs) Na2HPO4· 12H2O and Na2SO4· 10H2O is loaded into halloysite nanotubes (HNTs) by water bath sonication and impregnation under vacuum at 40 °C. It is the first time HNTs are applied as nanocontainers for crystallohydrate PCMs for thermal energy storage. The PCM retains well in the nanocontainers over the solid–liquid phase change, due to the electrostatic interaction between PCM and the inner space of HNTs as well as the nanoconfinement effect. No new covalent bonding is formed between PCM and HNTs in the composite. The crystal structure of the hydrated salts mixture does not change after loading into HNTs. With 67 wt% effective loading of Na2HPO4· 12H2O and Na2SO4· 10H2O in 1:1 mass ratio, the nanocontainer composite exhibits the melting temperature of 35.8 °C and the melting enthalpy of 142 J g−1. During the thermal cycling tests, it shows no phase separation and the thermal stability is well kept for 50 cycles. The PCM/HNTs nanocontainers can be considered as efficient nanoscaled energy storage units with great potential in practical applications.

Item Type: Article
Uncontrolled Keywords: crystallohydrate, energy capsules, halloysite, heat storage
Depositing User: Symplectic Admin
Date Deposited: 10 Oct 2018 07:48
Last Modified: 18 Sep 2023 15:10
DOI: 10.1002/adem.201800618
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