Effects of nano-SiO2 on morphology, thermal energy storage, thermal stability, and combustion properties of electrospun lauric acid/PET ultrafine composite fibers as form-stable phase change materials
The ultrafine composite fibers consisting of lauric acid (LA), polyethylene terephthalate (PET), and silica nanoparticles (nano-SiO2) were prepared through the materials processing technique of electrospinning as an innovative type of form-stable phase change materials (PCMs). The effects of nano-SiO2 on morphology, thermal energy storage, thermal stability, and combustion properties of electrospun LA/PET/SiO2 composite fibers were studied. SEM images revealed that the LA/PET/SiO2 composite fibers with nano-SiO2 possessed desired morphologies with reduced average fiber diameters as compared to the LA/PET fibers without nano-SiO2. DSC measurements indicated that the amount of nano-SiO2 in the fibers had an influence on the crystallization of LA, and played an important role on the heat enthalpies of the composite fibers; while it had no appreciable effect on the phase change temperatures. TGA results suggested that the incorporation of nano-SiO2 increased the onset thermal degradation temperature, maximum weight loss temperature, and charred residue at 700 °C of the composite fibers, indicating the improved thermal stability of the fibers. MCC tests showed that the heat resistance effect and/or barrier property generated by nano-SiO2 resulted in an increase of initial combustion temperature and a decrease of the heat release rate for the electrospun ultrafine composite fibers.
Year of publication: |
2011
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Authors: | Cai, Yibing ; Ke, Huizhen ; Dong, Ju ; Wei, Qufu ; Lin, Jiulong ; Zhao, Yong ; Song, Lei ; Hu, Yuan ; Huang, Fenglin ; Gao, Weidong ; Fong, Hao |
Published in: |
Applied Energy. - Elsevier, ISSN 0306-2619. - Vol. 88.2011, 6, p. 2106-2112
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Publisher: |
Elsevier |
Keywords: | Form-stable phase change materials Electrospinning LA/PET composite fibers Nano-SiO2 Morphology Thermal energy storage |
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