Superhydrophobic meshes that can repel hot water and strong corrosive liquids used for efficient gravity-driven oil/water separation

Nanoscale ◽  
2016 ◽  
Vol 8 (14) ◽  
pp. 7638-7645 ◽  
Author(s):  
Jian Li ◽  
Ruimei Kang ◽  
Xiaohua Tang ◽  
Houde She ◽  
Yaoxia Yang ◽  
...  
Keyword(s):  
Hot Water ◽  
Water Separation ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

scholarly journals Gravity-Driven Separation of Oil/Water Mixture by Porous Ceramic Membranes with Desired Surface Wettability

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 457
Author(s):  
Chunlei Ren ◽  
Wufeng Chen ◽  
Chusheng Chen ◽  
Louis Winnubst ◽  
Lifeng Yan
Keyword(s):  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Separation Performance ◽  
Water Mixture ◽  
Alumina Membrane ◽  
Water Separation ◽  
Alumina Membranes ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

Porous Al2O3 membranes were prepared through a phase-inversion tape casting/sintering method. The alumina membranes were embedded with finger-like pores perpendicular to the membrane surface. Bare alumina membranes are naturally hydrophilic and underwater oleophobic, while fluoroalkylsilane (FAS)-grafted membranes are hydrophobic and oleophilic. The coupling of FAS molecules on alumina surfaces was confirmed by Thermogravimetric Analysis and X-ray Photoelectron Spectroscopy measurements. The hydrophobic membranes exhibited desired thermal stability and were super durable when exposed to air. Both membranes can be used for gravity-driven oil/water separation, which is highly cost-effective. The as-calculated separation efficiency (R) was above 99% for the FAS-grafted alumina membrane. Due to the excellent oil/water separation performance and good chemical stability, the porous ceramic membranes display potential for practical applications.

Reusable, salt-tolerant and superhydrophilic cellulose hydrogel-coated mesh for efficient gravity-driven oil/water separation

2018 ◽  
Vol 338 ◽  
pp. 271-277 ◽  
Author(s):  
Chenghong Ao ◽  
Rui Hu ◽  
Jiangqi Zhao ◽  
Xiaofang Zhang ◽  
Qingye Li ◽  
...  
Keyword(s):  
Salt Tolerant ◽  
Water Separation ◽  
Cellulose Hydrogel ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

scholarly journals Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 442 ◽  
Author(s):  
Mingguang Yu ◽  
Qing Wang ◽  
Wenxin Yang ◽  
Yonghang Xu ◽  
Min Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Repellency ◽  
Cotton Fabrics ◽  
Ammonia Solution ◽  
Hot Water ◽  
Water Contact ◽  
Water Separation ◽  
Efficient Strategy ◽  
Oil Water Separation ◽  
Oil Water

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

pH-Induced switches of the oil- and water-selectivity of crosslinked polymeric membranes for gravity-driven oil–water separation

2016 ◽  
Vol 4 (35) ◽  
pp. 13543-13548 ◽  
Author(s):  
Ching-Ting Liu ◽  
Ying-Ling Liu
Keyword(s):  
Polymeric Membranes ◽  
Water Separation ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

A membrane with pH-induced switchable oil- and water-selectivity for gravity-driven continuous oil–water separation.

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