Cenosphere-based PCM microcapsules with bio-inspired coating for thermal energy storage in cementitious materials
نویسندگان
چکیده
Phase change materials (PCMs) provide passive storage of thermal energy in buildings to flatten heating and cooling load profiles minimize peak demands. After microencapsulated into a protective shell, they can be directly added cementitious add capacity the material. However, existing studies show that strength produced drastically reduced by PCM microcapsules. To overcome this drawback, study develops novel microcapsule using cenosphere as together with bio-inspired dopamine coating. As hollow fly ash particles, shells are much harder stronger than commonly used polymer based shells. While strong binding ability diverse surfaces through covalent non-covalent interactions provides better bonding between surrounding cement paste. For these reasons, mortar greatly improved microcapsule. An experimental shows 35% increase compressive has been achieved adding 10 wt% new mortar. Microstructure examination hydration products analysis revealed coating facilitates produces denser interface result, is developed which not only integrates latent heat but also enhance mortar, cannot any other • Novel shell. Bio-inspired on Heat for PDM10 found increased ΔH m, c 17.63 J/g 15.58 J/g. The maximum was reached PDM10, higher control. Dopamine/polydopamine facilitate deposited surface cenosphere.
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ژورنال
عنوان ژورنال: Materials Chemistry and Physics
سال: 2022
ISSN: ['0254-0584', '1879-3312']
DOI: https://doi.org/10.1016/j.matchemphys.2022.126745