Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 248, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2022.112036
Keywords
Phase change materials; Zirconium phosphate nanosheets; Sodium lignosulfonate biochar; Solar -to -thermal conversion; Flame retardancy
Funding
- National Natural Science Foundation of China [52003111, U20A20340]
- National Key R&D Program of China [2020YFB0408100]
- Program for Guangdong Introducing Innovative and Entrepreneurial Team [2016ZT06C412]
- Foshan Science and Technology Innovation Team Project [1920001000108]
- Opening Project of Key Laboratory of Polymer Processing Engineering (South China University of Technology), Ministry of Education [KFKT2001]
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In this study, PCMs (ZrP-PI@PEG) with excellent thermal energy storage, solar-to-thermal conversion, and flame retardancy were successfully fabricated. The results showed that ZrP-PI@PEG exhibits high adsorption ratio, outstanding latent heat, and reduced flame retardant index. Furthermore, it demonstrated good thermal stability and reliability in leakage experiment and thermal cycling test.
Liquid-solid organic phase change materials (PCMs) exist shortcomings of leakage, poor solar-to-thermal con-version efficiency, and flammability, which restrict the application scope of solar-thermal energy storage. To meet these problems, PCMs (ZrP-PI@PEG) with excellent thermal energy storage, solar-to-thermal conversion, and flame retardancy were fabricated in this study. The polyimide (PI)/sodium lignosulfonate-zirconium phos-phate (SL-ZrP) hybrid-aerogels (ZrP-PI) were prepared by freeze-drying and thermal imidization. ZrP-PI aerogels composited with polyethylene glycol (PEG) via vacuum impregnation to fabricate the composite PCMs (CPCMs, ZrP-PI@PEG). The in-situ biochar generated from SL-ZrP increases both solar-to-thermal conversion and flame retardant of CPCMs. The final result demonstrates that ZrP-PI@PEG exhibits a superior adsorption ratio (95.5%) and outstanding latent heat (157.67 J/g), as well as about 13% flame retardant index decrease in heat release rate (HRR) and total heat release rate (THR). Furthermore, ZrP-PI@PEG shows great thermal stability and reliability after conducting a leakage experiment and thermal cycling test. These superior resultants indicate that ZrP-PI@PEG has a good potential for widespread and long-term use in solar thermal energy storage.
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