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Stearic acid modified montmorillonite as emerging microcapsules for thermal energy storage
AbstractIn order to obtain an efficient phase change material (PCM), emerging montmorillonite/stearic acid (Mt/SA) microcapsules containing SA core with Mt shell were designed and prepared via self-assembly of Mt in the SA emulsion. The Mt/SA microcapsules were coated with SiO2 from the hydrolysis and polycondensation of TEOS to enhance the structure stability. The microstructure, thermal properties and reliability of Mt/SA microcapsules were investigated via scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The Mt/SA microcapsules presented sphere-like particles and had a size distribution from 10 to 30μm. The freezing latent heat of the Mt/SA microcapsules was 118J/g at 52.3°C. The energy storage rate of the Mt/SA microcapsules was faster compared to SA. The Mt/SA microcapsules had excellent structural stability, high energy storage capacity and stable energy storage and release performances. The energy storage performances of the Mt/SA microcapsules were superior to the Mt/SA composites prepared via vacuum impregnation. Excellent energy storage reliability and capability of the Mt/SA microcapsules have advantages for solar energy storage fields.
Graphical abstract
HighlightsMontmorillonite/stearic acid/(Mt/SA) microcapsules were designed via self-assembly.Microcapsules were coated with the hydrolyzate SiO2 to enhance the structure stability.Mt/SA presented spherical particles with a size distribution from 10 to 30μm.Mt/SA showed higher thermal storage and release rate with excellent stability.
Stearic acid modified montmorillonite as emerging microcapsules for thermal energy storage
AbstractIn order to obtain an efficient phase change material (PCM), emerging montmorillonite/stearic acid (Mt/SA) microcapsules containing SA core with Mt shell were designed and prepared via self-assembly of Mt in the SA emulsion. The Mt/SA microcapsules were coated with SiO2 from the hydrolysis and polycondensation of TEOS to enhance the structure stability. The microstructure, thermal properties and reliability of Mt/SA microcapsules were investigated via scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The Mt/SA microcapsules presented sphere-like particles and had a size distribution from 10 to 30μm. The freezing latent heat of the Mt/SA microcapsules was 118J/g at 52.3°C. The energy storage rate of the Mt/SA microcapsules was faster compared to SA. The Mt/SA microcapsules had excellent structural stability, high energy storage capacity and stable energy storage and release performances. The energy storage performances of the Mt/SA microcapsules were superior to the Mt/SA composites prepared via vacuum impregnation. Excellent energy storage reliability and capability of the Mt/SA microcapsules have advantages for solar energy storage fields.
Graphical abstract
HighlightsMontmorillonite/stearic acid/(Mt/SA) microcapsules were designed via self-assembly.Microcapsules were coated with the hydrolyzate SiO2 to enhance the structure stability.Mt/SA presented spherical particles with a size distribution from 10 to 30μm.Mt/SA showed higher thermal storage and release rate with excellent stability.
Stearic acid modified montmorillonite as emerging microcapsules for thermal energy storage
Peng, Kang (author) / Fu, Liangjie (author) / Li, Xiaoyu (author) / Ouyang, Jing (author) / Yang, Huaming (author)
Applied Clay Science ; 138 ; 100-106
2017-01-03
7 pages
Article (Journal)
Electronic Resource
English
Stearic acid modified montmorillonite as emerging microcapsules for thermal energy storage
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