Facile fabrication of shape-stable phase change materials based green composite for passive conditioning in buildings

Chandrani Sarkar, Abhishek Bhattacharya, Tewodros Belay Ashagre, Rahul Verma, Dibakar Rakshit and Sampa Saha

Renewable Energy, 2025, vol. 247, issue C

Abstract: Biopolymer, PHBV [Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)] has been demonstrated to provide great support to enhance the shape stability of n-eicosane, phase change material (PCM). The green composite comprising of PHBV and m-PCM (modified PCM) has shown enormous potential to be considered for thermal energy storage in buildings. Post fabrication, the composite film was exposed to corona treatment for improving their adhesion with building materials. Results showed that both corona-treated and non-treated m-PCM/PHBV have high thermal energy storage capability (>98 %). For instance, corona-treated film with a phase transition enthalpy of 184.9 ± 12.8 J g−1 exhibited high phase transfer repeatability and thermal reliability. The isothermal and non-isothermal DSC study revealed the optimum heat charging and discharging of the treated film, i.e., 21 °C–45 °C. The present study also demonstrated the impact of the incorporation of m-PCM/PHBV film on the thermal behavior of building materials by passive design strategy. The experimental testing of bricks containing m-PCM/PHBV under actual conditions was carried out at Delhi, India for five days (Sep 30, 2023 to Oct 4, 2023). A substantial reduction of temperature (∼7.5 °C) was observed in the bottom part of the brick having m-PCM/PHBV films, signifying their potential to be considered for passive conditioning in buildings.

Keywords: Phase change materials; Shape stable; Biodegradable biopolymer; Thermal energy storage; Building (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:247:y:2025:i:c:s0960148125006081

DOI: 10.1016/j.renene.2025.122946

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