Novel Bio-Based Pomelo Peel Flour/Polyethylene Glycol Composite Phase Change Material for Thermal Energy Storage

Abstract

A series of novel bio-based form stable composite phase-change materials (fs-CPCMs) for solar thermal energy storage and management applications were prepared, using the pomelo peel flour (PPF) as the supporting matrix and poly (ethylene glycol) (PEG) or isocyanate-terminated PEG to induce a phase change. The microscopic structure, crystalline structures and morphologies, phase change properties, thermal stability, light-to-thermal conversion behavior, and thermal management characteristics of the obtained fs-CPCMs were studied. The results indicate that the obtained fs-CPCM-2 presented remarkable phase-change performance and high thermal stability. The melting latent heat and crystallization heat for fs-CPCM-2 are 143.2 J/g and 141.8 J/g, respectively, and its relative enthalpy efficiency ( λ ) is 87.4%, which are higher than most reported values in the related literature. The obtained novel bio-based fs-CPCM-2 demonstrated good potential for applications in solar thermal energy storage and waste heat recovery.

Advances and Applications of Phase Change Materials (PCMs) and PCMs-based Technologies

“…It has a high phase change enthalpy, an easily regulated phase change temperature, environmentally friendly, chemically stable, and so on. [33][34][35][36][37] 2.1.1.3 Fatty acids and fatty acid derivatives Fatty acid is a standard PCM with many superior properties, including suitable melting temperature range, high heat capacity, complete melting, little or no supercooling during phase change, low vapor pressure, non-toxic, non-corrosive to metal containers, good thermal stability, low cost, noncombustibility, and small volume changes. [38,39] The fatty acids commonly used to make PCM mainly include capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid.…”