Unique 3D interpenetrating capillary network of wood veneer for highly efficient cross flow filtration
- PDF / 4,502,016 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 94 Downloads / 172 Views
Unique 3D interpenetrating capillary network of wood veneer for highly efficient cross flow filtration Xiu Zhu1, Jinbo Hu1,*, Gonggang Liu1,* , Dongnian Xu1, Yuan Wei1, Dahua Li2, Shanshan Chang1, Xianjun Li1, and Yuan Liu1 1
Hunan Province Key Laboratory of Materials Surface and Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Shaoshan South Road, No. 498, Changsha 410004, China 2 The Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Received: 21 June 2020
ABSTRACT
Accepted: 20 October 2020
Natural wood is mainly comprised of numerous long, partially aligned channels which are connected by micropores (such as ray cells, pits) providing highefficiency nutrient transportation corridor. Here, thin wood veneer (the thickness of 400 lm) was used to design catalytic membrane for water treatment with reversed-tree transport pathways. As filtering direction is nearly perpendicular to wood growth direction, wood veneer possesses abundant sinuous water channels based on partially aligned and interconnected cell lumens which provide long enough micro reaction and suitable water transfer pathways in a greatly reduced thickness. Meanwhile due to a small rotary cutting angle, large number of incisions of vessels and fibers were formed ensuring large inlet area for fluid transport. And mussel-inspired polydopamine (PDA) was used to modify the surface of wood pores with highly active functional groups. Then, Pd nanoparticles could be in situ grown and immobilized onto wood channels via these groups (Pd/PDA/wood veneer). On account of the unique 3D interpenetrating capillary network structure, Pd/PDA/wood veneer shows a highly efficient water treatment for methylene blue (MB) solution. The flux of Pd/ PDA/wood veneer can reach 3462 L/(m2h) with high MB removal efficiency ([ 95%), meanwhile it shows good mechanical strength and flexibility. The designed thin wood veneer with unique structure exhibits promising results for practical wastewater treatment and even wider applications such as solarthermal conversion, microreactor design.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Stephen Eichhorn.
Address correspondence to E-mail: [email protected]; [email protected]
https://doi.org/10.1007/s10853-020-05478-6
J Mater Sci
GRAPHICAL ABSTRACT
Introduction The severe scarcity of clean water is arousing worldwide concern due to water pollution problem. Many emerging technologies and novel materials have been demonstrated toward clean water generations [1–3]. Especially, dyes and their effluent have become one of the main sources of water pollution, and they are difficult to be degraded by organism [4–6]. Membrane technology is a rapidly growing research area in water purification due to its energy conservation, high efficiency and cost-effectiveness [7, 8]. However, single membrane filtration methods may produ
Data Loading...
