Imperial College London
Portrait Picture

Professor Omar K. Matar, FREng

Faculty of Engineering, Department of Chemical Engineering

Head of Department of Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 9618o.matar Website

 
 
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Assistant

 

Mr Avery Kitchens +44 (0)20 7594 6263

 
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Location

 

305 ACEACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2022:10.1016/j.cej.2021.133746,
author = {Li, W and Zhou, H and Zhao, K and Jin, J and Chen, X and Wakil, Shahzad M and Jiang, Y and Matar, OK and Dai, S and Bin, Xu B and Sun, L},
doi = {10.1016/j.cej.2021.133746},
journal = {Chemical Engineering Journal},
pages = {1--7},
title = {Conformally anodizing hierarchical structure in a deformed tube towards energy-saving liquid transportation},
url = {http://dx.doi.org/10.1016/j.cej.2021.133746},
volume = {431},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The creation of drag-reducing surfaces in deformed tubes is of vital importance to thermal management, energy, and environmental applications. However, it remains a great challenge to tailor the surface structure and wettability inside the deformed tubes of slim and complicated feature. Here, we describe an electrochemical anodization strategy to achieve uniform and superhydrophobic coating of TiO2 nanotube arrays throughout the inner surface in deformed/bend titanium tubes. Guided by a hybrid carbon fibre cathode, conformal electric field can be generated to adaptatively fit the complex geometries in the deformed tube, where the structural design with rigid insulating beads can self-stabilize the hybrid cathode at the coaxial position of the tube with the electrolyte flow. As a result, we obtain a superhydrophobic coating with a water contact angle of 157° and contact angle hysteresis of less than 10°. Substantial drag reduction can be realised with an overall reduction up to 25.8 % for the anodized U-shaped tube. Furthermore, we demonstrate to spatially coat tubes with complex geometries, to achieve energy-saving liquid transportation. This facile coating strategy has great implications in liquid transport processes with the user-friendly approach to engineer surface regardless of the deformation of tube/pipe.
AU  - Li,W
AU  - Zhou,H
AU  - Zhao,K
AU  - Jin,J
AU  - Chen,X
AU  - Wakil,Shahzad M
AU  - Jiang,Y
AU  - Matar,OK
AU  - Dai,S
AU  - Bin,Xu B
AU  - Sun,L
DO  - 10.1016/j.cej.2021.133746
EP  - 7
PY  - 2022///
SN  - 1385-8947
SP  - 1
TI  - Conformally anodizing hierarchical structure in a deformed tube towards energy-saving liquid transportation
T2  - Chemical Engineering Journal
UR  - http://dx.doi.org/10.1016/j.cej.2021.133746
UR  - https://www.sciencedirect.com/science/article/pii/S1385894721053201?via%3Dihub
UR  - http://hdl.handle.net/10044/1/94868
VL  - 431
ER  -
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