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Sepiolite Nanocarriers as a Matrix for Controlled Thermal Energy Storage

[Image: see text] Applying the eutectic hydrated salt (EHS) mixture of Na(2)HPO(4)·12H(2)O and Na(2)SO(4)·10H(2)O in a 1:1 weight ratio as a phase-change material and natural sepiolite nanocarriers as a matrix, the form-stable phase-change composite EHS@sepiolite was fabricated by vacuum impregnatio...

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Detalles Bibliográficos
Autores principales: Zhu, Xiaolei, Vinokurov, Vladimir, Kopitsyn, Dmitry, Shchukin, Dmitry G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8495839/
https://www.ncbi.nlm.nih.gov/pubmed/34632238
http://dx.doi.org/10.1021/acsomega.1c04392
Descripción
Sumario:[Image: see text] Applying the eutectic hydrated salt (EHS) mixture of Na(2)HPO(4)·12H(2)O and Na(2)SO(4)·10H(2)O in a 1:1 weight ratio as a phase-change material and natural sepiolite nanocarriers as a matrix, the form-stable phase-change composite EHS@sepiolite was fabricated by vacuum impregnation. Due to the high porosity of sepiolite and its nanofibrous structure with internal channels, the effective loading of the phase-change material reached as high as 88 wt %. The melting temperature of the composite was 38.1 °C and its melting enthalpy was 185 J g(–1.) The crystallinity of the hydrated salt mixture was retained after loading into the sepiolite matrix. The composite demonstrated high stability over 50 heat uptake/release cycles maintaining its melting temperature and melting enthalpy the same. The combination of natural sepiolite nanocarriers and crystallohydrates is a cheap and efficient nanoscale energy storage system with high potential for practical applications and upscaling because of their natural abundance.