Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 149, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106505
Keywords
A Energy materials; A Multifunctional composites; A Nanoparticles; Solar-to-thermal conversion
Funding
- National Natural Science Foundation of China [51903092, 52073107]
- National Key Technology R&D Program of China [2020YFB1709301]
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The study developed flexible polyurethane/MXene solid-solid phase change materials with improved solar-to-thermal conversion efficiency and mechanical strength. The materials exhibited leakage-proof properties and excellent stability after thermal and light cycling tests, suggesting potential applications in solar thermal energy storage.
In this study, the novel flexible polyurethane/MXene solid-solid phase change materials (SSPCMs) with improved solar-to-thermal conversion efficiency and mechanical strength were constructed using polyethylene glycol (PEG)/MXene blends and hexamethylene diisocyanate trimer (HDIT) through an efficient polyurethane reaction. The obtained SSPCMs exhibit leakage-proof properties, which can be attributed to the formed threedimensional crosslinking network by HDIT and PEG. The melting phase transition enthalpy and relative enthalpy efficiency of SSPCMs with 2.0 wt% MXene (2.0-MPH) are 127.97 J/g and 76.96%, respectively, moreover, its solar-to-thermal conversion efficiency (0) is as high as 90.45%. After 200 times thermal cycling and 50 times light cycling, its enthalpy values and 0 value remained almost unchanged, indicating that the obtained 2.0-MPH possessed excellent solar-to-thermal reliability and cycle reusability. Simultaneously, the great comprehensive mechanical properties have further broadened the application of SSPCMs in the field of solar thermal energy storage.
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