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Preparation and properties of substrate pva-go composite membrane for solar photothermal conversion

Frontiers of Materials Science 2021年第4期15卷 632-642页

作者： Chengxin LI Zhuwei GAO Zhongxin LIU School of Chemical Engineering and Technology Hainan UniversityHaikou 570228China Key Laboratory of Advanced Materials of Tropical Island Resources(Ministry of Education) Hainan UniversityHaikou 570228China Hainan Provincial Key Laboratory of Fine Chemicals Hainan UniversityHaikou 570228China

Solar thermal desalination(STD)is a promising and sustainable technology for extracting clean water *** recent studies to improve STD performance primarily focus on interfacial solar evaporation,a non-traditional bottom heating method was designed in this ***,we prepared the polyvinyl alcohol/graphene oxide(pva-go)composite membrane and adhered to the bottom of a beaker using crystallized *** go was loaded on a non-woven fabric and different concentrations of pva were compared for their effect on the evaporation *** results showed that the addition of pva increased the evaporation *** surface characteristic of go membrane without pva was a fibrous filamentous structure as observed by SEM,whereby the fibers were clearly *** the pva concentration reached 6%,the non-woven fiber was completely wrapped by *** the action of a fixed light intensity,the photothermal conversion rates of go,2%pva-go,4%pva-go and 6%pva-go membrane device could reach 39.93%,42.61%,45.10%and 47.00%,respectively,and the evaporation rates were 0.83,0.88,0.94 and 0.98 kg$m-2$h-1,*** addition,the pva-go composite membrane showed an excellent stability,which has significance for industrial application.

关键词： solar thermal desalination pva-go membrane photothermal evaporator photothermal conversion efficiency stability

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