Preparation of porous PTFE /C composite foam and its application in gravity‐driven oil–water separation

2021 ◽  
Author(s):  
Xiaoming Guo ◽  
Yongyi Yao ◽  
Puxin Zhu ◽  
Mi Zhou ◽  
Tao Zhou
Keyword(s):  
Water Separation ◽  
Composite Foam ◽  
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.

Controlling Superwettability by Microstructure and Surface Energy Manipulation on Three-Dimensional Substrates for Versatile Gravity-Driven Oil/Water Separation

2017 ◽  
Vol 9 (43) ◽  
pp. 37529-37535 ◽  
Author(s):  
Hao-Yang Mi ◽  
Xin Jing ◽  
Han-Xiong Huang ◽  
Lih-Sheng Turng
Keyword(s):  
Surface Energy ◽  
Three Dimensional ◽  
Water Separation ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

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

Chelation Assembly of Cellulose Nanohydrogel onto Flower-Like Structured Foam with Underwater Superoleophobicity for Highly Efficient Oil–Water Separation

NANO ◽  
2021 ◽  
pp. 2150061
Author(s):  
Yuntian Wan ◽  
Xue Lin ◽  
Zhongshuai Chang ◽  
Xiaohui Dai ◽  
Jiangdong Dai
Keyword(s):  
Water Flux ◽  
Separation Performance ◽  
Layer By Layer ◽  
Potential Candidate ◽  
Oily Wastewater ◽  
Water Separation ◽  
Composite Foam ◽  
Oil Water Separation ◽  
Oil Water ◽  
Underwater Superoleophobicity

Currently, with the increasingly serious pollution problem of oily wastewater, it is urgent to develop advanced materials and methods. In this work, a Fe(III)-CMC@Ni(OH)2@Ni composite foam with superhydrophilic and underwater superoleophobicity was fabricated by an in situ growth of flower-like Ni(OH)2 nanoparticles and chelated assembly of Fe(III)-CMC nanohydrogel via a layer-by-layer self assembly using Fe[Formula: see text] ion and carboxymethyl cellulose (CMC). The composite foam could separate various oil/water mixtures and exhibited excellent efficiency over 99%. This foam possessed ultrahigh water flux (220000[Formula: see text]L m[Formula: see text] h[Formula: see text] and better resistant to penetration pressure (1.3[Formula: see text]kPa). After 30 cycles, the oil–water separation performance reduced only 0.5%, but the foam structure was still stable that guarantees a better lifetime. Besides, this composite foam showed anti-fouling, unique durability and excellent corrosion resistance performance. Taking into account all good properties, Fe(III)-CMC@Ni(OH)2@Ni composite foam was expected to be a potential candidate for responding to all kinds of complex oily wastewater conditions.

scholarly journals Superoleophilic, Mechanically Strong Electrospun Membranes for Fast and Efficient Gravity-Driven Oil/Water Separation

2019 ◽  
Vol 1 (4) ◽  
pp. 765-776 ◽  
Author(s):  
Ilin Sadeghi ◽  
Nelaka Govinna ◽  
Peggy Cebe ◽  
Ayse Asatekin
Keyword(s):  
Water Separation ◽  
Electrospun Membranes ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

Eco-friendly and scratch-resistant hybrid coating on mesh for gravity-driven oil/water separation

2019 ◽  
Vol 241 ◽  
pp. 118369 ◽  
Author(s):  
Jintao Wang ◽  
Jinlong Wu ◽  
Fenglan Han
Keyword(s):  
Hybrid Coating ◽  
Water Separation ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

Bioinspired Superhydrophobic and Superlipophilic Nanofiber Membrane with Pine Needle-like Structure for Efficient Gravity-driven Oil/Water Separation

2021 ◽  
pp. 119098
Author(s):  
Ying Su ◽  
Tingting Fan ◽  
Haoyan Bai ◽  
Hengshu Guan ◽  
Xin Ning ◽  
...  
Keyword(s):  
Nanofiber Membrane ◽  
Pine Needle ◽  
Water Separation ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

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
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