Smart Superhydrophobic Filter Paper for Water/Oil Separation and Unidirectional Transportation of Liquid Droplet

Water/oil separation from their mixture and emulsion has been a prominent topic in fundamental research and in practical applications. In this work, a smart superhydrophobic membrane (SHP) was obtained by dipping an off-the-shelf laboratory filter paper in an ethanol suspension of trichloro (1H,1H,2...

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Bibliographic Details
Published in:Membranes (Basel) 2022-11, Vol.12 (12), p.1188
Main Authors: Zhang, Yu-Ping, Wang, Ning, Chen, De-Liang, Chen, Yuan, Chen, Meng-Jun, Chen, Xin-Xin
Format: Article
Language:English
Subjects:
Carbon
Carbon tetrachloride
Cellulose
Contact angle
dip coating
Droplets
emulation separation
Emulsions
Ethanol
Filter paper
Hydrophobic surfaces
Hydrophobicity
Janus membranes
Lasers
Membranes
Methylene blue
Mixtures
Nanoparticles
nanosecond laser
Oil
Photosensitivity
Pore size
Separation
Silicon wafers
Substrates
superhydrophobic filter paper
Surfactants
Tetraethoxysilane
Tetraethyl orthosilicate
Titanium dioxide
Transportation
Transportation industry
Water purification
Wettability
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Summary:Water/oil separation from their mixture and emulsion has been a prominent topic in fundamental research and in practical applications. In this work, a smart superhydrophobic membrane (SHP) was obtained by dipping an off-the-shelf laboratory filter paper in an ethanol suspension of trichloro (1H,1H,2H,2H-tridecafluoro-n-octyl) silane, tetraethyl orthosilicate, and titanium dioxide nanoparticles with different dimensions of 20 and 100 nm. The selection of membrane substrates was optimized including different quantitative and quantitative filter papers with different filtration velocity (slow, intermediate, and fast). The as-prepared SHP was demonstrated to be superhydrophobic and photosensitive, which was used in the separation of carbon tetrachloride and water from their mixture and emulsion. Moreover, orderly aligned micropores were formed for the modified superhydrophobic filter papers by using nanosecond laser. Unidirectional penetration was obtained for the UV-irradiated paper with a bored pore in the range of 50-500 μm in the systems of air/water and water/oil. This study may promote the understanding of unidirectional transportation of liquid droplet and facilitate the design of interfacial materials with Janus-type wettability.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12121188