| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Preparation and Performance of Multi-layer Structural Polyacrylamide Hydrogel Solar-driven Evaporator |
| LI Tao, MENG Weiming, WANG Dingding, WEI Chunxiang, LU Hongdian*
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| School of Energy, Materials and Chemical Engineering, Hefei University, Hefei 230601, China |
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Abstract Optimizing the structure and enhancing photothermal conversion efficiency are effective ways to improve the performance of solar-driven eva-porator. Based on in-situ radical polymerization, a multi-layer structural polyacrylamide (PAM) hydrogel solar-driven evaporator was designed and its relevant performance was investigated. The evaporator was constructed by polyacrylamide/nanocellulose (PAM/CNF) as the water transport layer at the bottom, polyacrylamide/carbon nanotubes/titanium nitride (PAM/CNTs/TiN) as the photothermal conversion layer in the middle, and a rough surface layer of islanded polyacrylamide/hollow MXene microsphere (PAM/HSMX) on the top. As a result, the built PAM/CNF-PAM/CNTs/TiN-PAM/HSMX multi-layer structural hydrogel solar-driven evaporator (ML-SVG) can not only improve the photothermal conversion efficiency and reduce heat loss, but also promote the transportation of water, thus imparted it excellent evaporation performance. ML-SVG exhibites high evaporation rate of 2.2 kg·m-2·h-1 under 2 kW·m-2 sun irradiation, good recycling performance, and high efficient wastewater purification and saline desalination abilities.
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Published: 10 April 2024
Online: 2024-04-11
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| Fund:Anhui Provincial Natural Science Foundation (2108085QB47), Major Scientific Research Project of Universities in Anhui Province (2022AH040251). |
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2024, Vol. 38 
