标题: 3D-printed tripodal porous wood-mimetic cellulosic composite evaporator for salt-free water desalination

作者: Chen, L (Chen, Lu); He, SM (He, Shuaiming); Huang, W (Huang, Wei); Liu, DP (Liu, Dapeng); Bi, TT (Bi, Tingting); Zhang, CT (Zhang, Chuntao); Chen, CJ (Chen, Chaoji)

来源出版物: COMPOSITES PART B-ENGINEERING  卷: 263  文献号: 110830  DOI: 10.1016/j.compositesb.2023.110830  出版年: AUG 15 2023  

摘要: Solar desalination based on interfacial evaporation has been proven promising in producing clean water. However, so far, the lack of a facile preparation strategy and effective salt rejection has profoundly limited its potential for practical applications. Herein, inspired by the unique liquid transportation of natural wood, we report on a three-dimensional (3D) printed tripodal porous wood-mimetic cellulosic composite evaporator for long-term salt rejection, starting from cost-effective materials such as cellulose and carbon black. The printed evaporator displays a broadband solar absorption (>97%) and an extremely low thermal conductivity (0.075 W m(-1) K-1), indicating its high photothermal conversion efficiency and outstanding thermal management. The printed tripodal porous evaporator contains large-sized channels (similar to 1 mm in diameter) that function as salt regenerating pathways, micropores (similar to 30 mu m) and submicron pores (similar to 1 mu m) for rapid water transport and efficient supply. Fluidic simulation reveals that large channels with high water flux lead to the salt concentration gradient between large and small channels via submicropores, meanwhile, the concentrated water at the top layer transports downward by diffusion and convection, further making the spontaneous horizontal and vertical salt exchange. Such a tripodal porous structure endows the evaporator with a high efficiency of similar to 75% in a highly concentrated salt solution (15 wt% NaCl) under 1 sun irradiation, as well as superior salt-rejection property (100 h continuous evaporation in 15 wt% NaCl). This strategy, starting with sustainable cellulose-based composite materials and being able to balance the evaporation performance and long-term stability, opens up new doors toward clean water production.

作者关键词: Solar evaporator; Salt rejection; 3D printing; Pore engineering; Nature-inspired

地址: [Chen, Lu; Bi, Tingting; Chen, Chaoji] Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

[He, Shuaiming] South China Univ Technol, State Key Lab Pulp & Paper Making Engn, Guangzhou 510640, Peoples R China.

[Huang, Wei; Zhang, Chuntao] Wuhan Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430081, Peoples R China.

[Liu, Dapeng] Tongji Univ, Interdisciplinary Mat Res Ctr, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China.

通讯作者地址: Chen, CJ (通讯作者)，Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

Zhang, CT (通讯作者)，Wuhan Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430081, Peoples R China.

电子邮件地址: zhangchuntao@wust.edu.cn; chenchaojili@whu.edu.cn

影响因子：13.1