Journal
RSC ADVANCES
Volume 8, Issue 60, Pages 34224-34231Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra06536e
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Funding
- Zhejiang Provincial Natural Science Foundation of China [LY18E060007]
- National Natural Science Foundation of China [51606168]
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Wrinkled mesoporous silica nanopartide (WMSN), with a special and highly uniform morphology, large specific surface area and pore volume, high porosity and radial-like wrinkled channels, was successfully prepared by a simple and easy synthetic method. WMSN was used as the matrix of myristic acid (MA) to prepare a new attractive shape-stabilized PCM (MA/WMSN), and the wrinkled channels of WMSN are useful to prevent the leakage of PCM, and increase the thermal stability and phase change enthalpy of shape-stabilized PCM. Characterizations of MA/WMSN, such as structure, crystallization properties, chemical properties and thermal properties were studied, and the interaction mechanism between the WMSN and MA molecules was elucidated. TGA results suggested that MA/WMSN had excellent thermal stability. When the loading of MA in MA/WMSN was 65%, the melting and crystallizing enthalpies of MA/WSSN were 92.0 J g(-1) and 86.0 J g(-1), respectively. Additionally, the thermal conductivity of MA/WMSN was 0.37 W mK(-1), which was about 1.37 times higher than that of the pure MA. All of the study results demonstrated that MA/WMSN possessed of favourable thermal conductivity, high latent heats and excellent thermal stability, and therefore it could be a suitable thermal energy storage material for practical applications.
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