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Preparation and Characterization of Paraffin@CLPS/MS Phase Change Microcapsules for Thermal Energy Storage
Author(s) -
Zhao Manxiang,
Li Mingkun,
Wang Lu,
Zhang Xu,
Kong Xiangfei
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001263
Subject(s) - phase change material , materials science , polystyrene , thermal energy storage , chemical engineering , pickering emulsion , polymerization , in situ polymerization , emulsion , thermal stability , interfacial polymerization , emulsion polymerization , latent heat , composite material , phase change , polymer , monomer , ecology , thermodynamics , physics , engineering physics , engineering , biology
In this study, a series of encapsulated micro phase change material (EMPCM) based on industrial paraffin and inorganic‐organic hybrid shell was reported. The microcapsules (28#P@CLPS/MS) were synthesized with 28#paraffin (28#P) as phase change material (PCM), crosslinked polystyrene (CLPS) as flexible organic shell and modified nano SiO 2 (MS) as rigid inorganic shell, via a Pickering emulsion polymerization method. MS reduces the interfacial tension of water and plays a good emulsification effect. Secondly, after polymerization, the mechanical stability of the microcapsule shell can be enhanced, and the thermal reliability of the phase change microcapsules can be improved. The morphology, thermal energy storage capacity, and structure of microcapsules were characterized and analyzed. Besides, the grafting ratio of nano SiO 2 on the heat storage properties of microcapsules was investigated. When the graft ratio of nano‐SiO 2 was 4.2 %, the prepared microcapsules with highst paraffin content (54.37 %) and encapsulation efficiency (95.15 %). The synthesized microcapsules with regular spherical shape and size range of 1–5 μm, latent heat capacity (T m 28.20 °C, 86.35 J/g) and good thermal stability. Besides, the chemical composition of the microcapsules did not change after 500 cycles, and the latent heat did not decrease. Our research shows that Pickering emulsion polymerization is a convenient, economical and green method for the preparation of highly stable energy storage microcapsules.