Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (8): 2689.doi: 10.7503/cjcu20210045

• Materials Chemistry • Previous Articles     Next Articles

Self-floating Porous PVDF-CNT Microbeads for Highly Efficient Solar-driven Interfacial Water Evaporation

LIANG Pingping1,2, LIU Shuai1, LI Hongyi1, DING Yadan1, WEN Xiaokun1, LIU Junping1, HONG Xia1()   

  1. 1.Key Laboratory of UV?Emitting Materials and Technology,the Ministry of Education,Northeast Normal University,Changchun 130024,China
    2.School of Mechanical and Civil Engineering,Jilin Agricultural Science and Technology University,Jilin 132101,China
  • Received:2021-01-20 Online:2021-08-10 Published:2021-08-05
  • Contact: HONG Xia E-mail:xiahong@nenu.edu.cn

Abstract:

Self-floating porous polyvinylidene fluoride-carbon nanotube(PVDF-CNT) microbeads were prepared by a convenient phase inversion method for solar-driven interfacial water evaporation. The unique composition and porous microsphere structure synergistically contribute to efficient sunlight capture, adequate water transport and rapid vapor escape. The higher the content of CNTs is, the better performance the PVDF-CNT microbeads show. The highest light absorption of PVDF-CNT microbeads can reach up to about 94.5% and the water surface temperature quickly rises from 20.8 ℃ to 43.1 ℃ within 2 min illumination. Under the simulated solor irradiation of 1 kW/m2, the PVDF-CNT microbeads exhibit a water evaporation rate of 1.501 kg/(m2·h) and a solar energy conversion efficiency of 94.2%.

Key words: Carbon nanotubes, Polymer, Phase inversion, Photothermal property, Water evaporation

CLC Number: 

TrendMD: