Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 201, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2019.110122
Keywords
Silica aerogel; Ambient pressure drying; Flexibility; Monolith; Shape-stabilized PCMs
Funding
- National Natural Science Foundation of China [51436001, 51802016]
- Fundamental Research Funds for the Central Universities [FRF-BD-18-013A]
- State Key Laboratory for Advanced Metals and Materials [2018Z-04]
- 13th 5-year-planadvanced research on equipment of the Equipment Development Department [6140A64020116QT02001]
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Flexible monolithic silica aerogel was prepared using an ambient pressure drying method without extra modifying and solvent-exchange process by controlling the crosslinking degree of the network and in-situ modification of methyl groups to the siloxane backbone. The introduction of the CH3-riched trimethylmethoxysilane (TMMS) molecules transforms silica clusters from originally rigid network structure with high crosslinking degree into flexible network structure with low crosslinking degree, not only improving the flexibility of the aerogel, but also endowing the hydrophobic property. The monolith feature, flexibility, hierarchical porous structure and hydrophobicity make the aerogel an ideal porous support for fabricating shape-stabilized phase change materials (PCMs). The obtained monolithic Paraffin (PA)/Aerogel composite shows high loading amount of PCMs, enhanced phase change enthalpy and good thermal stability. It is convenient to produce diverse shapes of monolithic composite PCMs to satisfy a range of specific requirements for energy storage applications.
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