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 () 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.
Highlights
The development of human society is closely related to the utilization of energy [1,2]
It can be clearly seen that the pomelo peel and pomelo peel flour (PPF) are typical fluffy porous materials, which can be used as supporting materials for
These results indicate that PPF is a typical mesoporous material, and these mesoporous structures facilitate the absorption of molted Polyethylene glycol (PEG) fragments by PPF [23]
Summary
The development of human society is closely related to the utilization of energy [1,2]. From the age of wood as the main energy source to the age of coal, and to the age of oil, every energy innovation has brought tremendous social development and new breakthroughs in science and technology [3,4]. The development and utilization of energy remarkably changed the lifestyle and living standards of human beings; human beings’ dependence on energy continues to increase [5]. Humanity can only capture and utilize a small fraction of this solar energy due to seasonality, weather changes, and other factors [8,9,10]. A Polymers 2019, 11, 2043; doi:10.3390/polym11122043 www.mdpi.com/journal/polymers
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