Anti-fouling graphene oxide based nanocomposites membrane for oil-water emulsion separation

2017 ◽  
Vol 77 (5) ◽  
pp. 1179-1185 ◽  
Author(s):  
Yang Feng ◽  
Zhiwen Wang ◽  
Ruixue Zhang ◽  
Yuanyuan Lu ◽  
Yuqing Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Membrane Fouling ◽  
Self Assembly ◽  
High Efficiency ◽  
Rejection Rate ◽  
Contact Angles ◽  
Water Contact ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water

Abstract Anti-fouling copper hydroxide nanowires (CHNs)-graphene oxide (GO) nanocomposites membrane was fabricated by a vacuum-assisted filtration self-assembly process. CHNs were covered on the surface and inserted into the interlayers of the GO nanosheets to form the rough surface and nanostructure channels. The membrane with water contact angles (CAs) of 53° and oil CAs of 155° exhibited superior stability, hydrophilicity, underwater superoleophobicity and ultralow oil adhesion, and hence it could separate the oil-water emulsion with a high efficiency of >99%. This membrane showed the combined advantages of high oil rejection rate and ultralow membrane fouling, making it promising for practical oil-water emulsion separation applications.

β-SiAlON ceramic membranes modified with SiO2 nanoparticles with high rejection rate in oil-water emulsion separation

2019 ◽  
Vol 45 (4) ◽  
pp. 4237-4242 ◽  
Author(s):  
Dong-Shuai Zhang ◽  
Hamidreza Abadikhah ◽  
Jun-Wei Wang ◽  
Lu-Yuan Hao ◽  
Xin Xu ◽  
...  
Keyword(s):  
Rejection Rate ◽  
Sio2 Nanoparticles ◽  
Ceramic Membranes ◽  
Water Emulsion ◽  
Sialon Ceramic ◽  
Emulsion Separation ◽  
Oil Water ◽  
High Rejection Rate ◽  
High Rejection

A facile surface modification of a PVDF membrane via CaCO3 mineralization for efficient oil/water emulsion separation

2020 ◽  
Vol 44 (48) ◽  
pp. 20999-21006
Author(s):  
Junda Wu ◽  
Atian Xie ◽  
Jin Yang ◽  
Jiangdong Dai ◽  
Chunxiang Li ◽  
...  
Keyword(s):  
Self Assembly ◽  
Layer By Layer ◽  
Assembly Process ◽  
Water Separation ◽  
Water Emulsion ◽  
Pvdf Membrane ◽  
Inorganic Particles ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water

A facile modification of a PVDF membrane using CaCO3 inorganic particles via a layer-by-layer self-assembly process for efficient oil/water separation.

Hierarchical rough surfaces formed by LBL self-assembly for oil–water separation

2014 ◽  
Vol 2 (30) ◽  
pp. 11830-11838 ◽  
Author(s):  
Xiaoyu Li ◽  
Dan Hu ◽  
Kun Huang ◽  
Chuanfang Yang
Keyword(s):  
Stainless Steel ◽  
Removal Efficiency ◽  
Self Assembly ◽  
Water Separation ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

Stainless steel felt modified with hierarchically structured coatings and hydrophobicity can achieve a removal efficiency of greater than 99% for oil-in-water emulsion separation.

scholarly journals Development of Polyvinylidene Fluoride Membrane via Assembly of Tannic Acid and Polyvinylpyrrolidone for Filtration of Oil/Water Emulsion

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 976
Author(s):  
Normi Izati Mat Nawi ◽  
Syasya Ong Amat ◽  
Muhammad Roil Bilad ◽  
Nik Abdul Hadi Md Nordin ◽  
Norazanita Shamsuddin ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Membrane Fouling ◽  
Polyvinylidene Fluoride ◽  
Ecological Impact ◽  
Mean Flow ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water ◽  
The Impact ◽  
Enhanced Surface

Wastewater containing oil/water emulsion has a serious ecological impact and threatens human health. The impact worsens as its volume increases. Oil/water emulsion needs to be treated before it is discharged or reused again for processing. A membrane-based process is considered attractive in effectively treating oil/water emulsion, but progress has been dampened by the membrane fouling issue. The objective of this study is to develop polyvinylidene fluoride (PVDF) membranes customized for oil/water emulsion separation by incorporating assembly of tannic acid (TA) and polyvinylpyrrolidone (PVP) in the polymer matrix. The results show that the assembly of TA/PVP complexation was achieved as observed from the change in colour during the phase inversion and as also proven from the characterization analyses. Incorporation of the TA/PVP assembly leads to enhanced surface hydrophilicity by lowering the contact angle from 82° to 47°. In situ assembly of the TA/PVP complex also leads to enhanced clean water permeability by a factor of four as a result of enhanced mean flow pore size from 0.2 to 0.9 µm. Owing to enhanced surface chemistry and structural advantages, the optimum hydrophilic PVDF/TA/PVP membrane poses permeability of 540.18 L/(m2 h bar) for oil/water emulsion filtration, three times higher than the pristine PVDF membrane used as the reference.

Ultra-robust Superhydrophobic/superoleophilic Stainless Mesh Coated by PTFE/SiO2 for Oil/water Separation

MRS Advances ◽  
2018 ◽  
Vol 4 (07) ◽  
pp. 359-367 ◽  
Author(s):  
Chaolang Chen ◽  
Ding Weng ◽  
Awais Mahmood ◽  
Jiadao Wang
Keyword(s):  
Contact Angle ◽  
Self Assembly ◽  
High Efficiency ◽  
Water Contact ◽  
Water Separation ◽  
Low Surface Energy ◽  
Assembly Method ◽  
Potential Applications ◽  
Oil Water Separation ◽  
Oil Water

AbstractIn this study, a superhydrophobic and superoleophilic stainless mesh coated with polytetrafluoroethylene/silicon dioxide (PTFE/SiO2) was fabricated through electrostatic self-assembly method followed by sintering treatment. The PTFE was utilized to construct low-surface-energy surface and the SiO2 nanoparticles were added to enhance its surface roughness. The as-prepared stainless mesh exhibited desirable superhydrophobicity and superoleophilicity with a water contact angle of 152° and oil contact angle of 0°. The coated stainless mesh could separate a variety of oil/water mixtures with high efficiency and it also exhibited good recyclability. Moreover, the corrosion-resistance of stainless mesh was greatly improved by coating it with PTFE. The thermogravimetric analysis (TGA) measurements showed that the coated mesh could withstand high temperature of up to 430°C, indicating excellent thermal-resistance. It is believed that this ultra-robust stainless mesh would have significant potential applications in industry.

Sensitivity of coalescence separation of oil–water emulsions using stainless steel felt enabled by LBL self-assembly and CVD

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71345-71354 ◽  
Author(s):  
Xiaoyu Li ◽  
Dan Hu ◽  
Lixia Cao ◽  
Chuanfang Yang
Keyword(s):  
Stainless Steel ◽  
Pore Size ◽  
Self Assembly ◽  
Surface Wettability ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

Coalescence sensitivity to surface wettability and pore size of roughened stainless steel felt was revealed for oil-in-water emulsion separation.

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