Abstract
This study is focused on the preparation and characterisation of n-nonadecane-vinyl copolymer shell nanocapsules for thermal energy storage medium. The n-nonadecane nanocapsules were prepared by a one-step miniemulsion in situ polymerisation method. n-Nonadecane was used as a core while styrene (St) and methylmethacrylate (MMA) was used as a vinyl copolymer shell. The Fourier transform infrared results confirmed that n-nonadecane nanocapsules were successfully synthesised. Morphological characteristic analysis indicates that these nnonadecane nanocapsules that were prepared using St/MMA (4:1) have a spherical shape and a narrow particle size distribution, with an average diameter of 160±11 nm. The maximum encapsulation ratio for n-nonadecane nanocapsules is 45.8 wt%. The DSC result of pure n-nonadecane and n-nonadecane nanocapsules exhibits two different peaks, which are related to their carbon numbers. The temperature and latent heat of melting and freezing of the n-nonadecane nanocapsules were determined to be 33.1 °C, 76.9 J/g and 30.2 °C, 82.0 J/g, respectively. Moreover, n-nonadecane nanocapsules exhibit good thermal and chemical stability, even after 1000 cycles of a thermal cycling test. Based on all of the results, it can be concluded that the n-nonadecane nanocapsules exhibit better energy storage and have good potential for buildings, textiles or other applications.
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Khadiran, T., Hussein, M.Z., Zainal, Z. et al. Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium. Macromol. Res. 23, 658–669 (2015). https://doi.org/10.1007/s13233-015-3088-z
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DOI: https://doi.org/10.1007/s13233-015-3088-z