scholarly journals Thiol–ene click reaction on cellulose sponge and its application for oil/water separation

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20147-20151 ◽  
Author(s):  
Zhenzhen Wu ◽  
Yingzhan Li ◽  
Linping Zhang ◽  
Yi Zhong ◽  
Hong Xu ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Click Reaction ◽  
Water Mixture ◽  
Water Separation ◽  
Cellulose Sponge ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
High Separation

Thiol–ene click reaction was employed to synthesize a flexible hydrophilic cellulose sponge. The sponge can be circular used in oil/water mixture (emulsion) separation and hold separation efficiency high separation efficiency.

A cellulose sponge with robust superhydrophilicity and under-water superoleophobicity for highly effective oil/water separation

2015 ◽  
Vol 17 (5) ◽  
pp. 3093-3099 ◽  
Author(s):  
Gang Wang ◽  
Yi He ◽  
He Wang ◽  
Lin Zhang ◽  
Quanyao Yu ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Separation ◽  
Water Emulsion ◽  
Cellulose Sponge ◽  
Highly Effective ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water

A cellulose sponge with properties of superhydrophilicity and under-water superoleophobicity gives 99.94% separation efficiency in oil–water emulsion separation.

scholarly journals A flexible Ti3C2Tx (MXene)/paper membrane for efficient oil/water separation

RSC Advances ◽  
2019 ◽  
Vol 9 (29) ◽  
pp. 16296-16304 ◽  
Author(s):  
Jayaprakash Saththasivam ◽  
Kui Wang ◽  
Wubulikasimu Yiming ◽  
Zhaoyang Liu ◽  
Khaled A. Mahmoud
Keyword(s):  
Separation Efficiency ◽  
Coated Paper ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
High Separation

A highly hydrophilic and oleophobic membrane based on Ti3C2Tx (MXene) coated paper demonstrated high separation efficiency for oil/water emulsions with excellent antifouling properties.

A self-cleaning TiO2 coated mesh with robust underwater superoleophobicity for oil/water separation in a complex environment

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65171-65178 ◽  
Author(s):  
Zhe-Qin Dong ◽  
Bao-Juan Wang ◽  
Min Liu ◽  
Xiao-hua Ma ◽  
Zhen-Liang Xu
Keyword(s):  
Separation Efficiency ◽  
Sol Gel ◽  
Complex Environment ◽  
Water Separation ◽  
Gel Method ◽  
Oil Water Separation ◽  
Oil Water ◽  
Self Cleaning ◽  
Underwater Superoleophobicity ◽  
High Separation

A TiO2 coated mesh with self-cleaning property, robust underwater superoleophobicity and high separation efficiency was fabricated by sol–gel method.

scholarly journals Effective oil–water mixture separation and photocatalytic dye decontamination through nickel-dimethylglyoxime microtubes coated superhydrophobic and superoleophilic films

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5035-5043
Author(s):  
Jinxiu Ma ◽  
Wen Meng ◽  
Lahong Zhang ◽  
Feng Li ◽  
Taohai Li
Keyword(s):  
Photocatalytic Degradation ◽  
Separation Efficiency ◽  
Coprecipitation Method ◽  
Water Mixture ◽  
Water Separation ◽  
Mixture Separation ◽  
Oil Water Separation ◽  
Oil Water

The nickel-dimethylglyoxime microtubes were synthesized by a facile coprecipitation method. The as-prepared superhydrophobic and superoleophilic films showed excellent oil–water separation efficiency and effective photocatalytic degradation.

scholarly journals Preparation and Application of Superhydrophobic Copper Mesh by Chemical Etching and In-situ Growth

2021 ◽  
Vol 9 ◽  
Author(s):  
Qilei Tong ◽  
Zhenzhong Fan ◽  
Biao Wang ◽  
Qingwang Liu ◽  
Yunhe Bo ◽  
...  
Keyword(s):  
Contact Angle ◽  
Chemical Etching ◽  
Separation Efficiency ◽  
Water Mixture ◽  
Water Contact ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Copper Mesh

Oily sewage and floating oil in the ocean post a huge threat to the ecological environment, therefore, developing an efficient separation for oil/water mixtures is an urgent need. Currently, superhydrophobic materials exhibit excellent oil/water separation ability. In this study, a superhydrophobic copper mesh prepared by the chemical etching method and the in-situ growth method and the performance evaluation are introduced. The oxide layer on the surface of the copper mesh is first removed by pickling, and then immersed in FeCl3 solution for chemical etching to make the surface rough, stearic acid (SA) is used for in-situ growth to reduce the surface energy, a superhydrophobic oil-water separation copper mesh is obtained. The water contact angle (WCA) of the copper mesh is more than 160°. The copper mesh is chemically stable and can effectively adsorb floating oil and separate the oil-water mixture. After several oil-water separation experiments, the oil-water separation efficiency can still be above 98%. The effects of the concentration of FeCl3 and SA on the contact angle and oil-water separation efficiency are investigated, the results show that when the concentration of FeCl3 is 2% and SA is 1.5%, the WCA and oil-water separation efficiency are the largest. The research used a simple and environmentally friendly method to prepare the oil-water separation copper mesh, which has important application significance for water quality restoration.

Surface Modification of Stainless-Steel Membrane using a Closed-Batch iCVD Reactor for Oil/Water Separation

2021 ◽  
Vol 25 (3) ◽  
pp. 53-61
Author(s):  
M. Gürsoy ◽  
Ö. Saygı ◽  
R. Hoyladı ◽  
M. Yorulmaz ◽  
M. Karaman
Keyword(s):  
Stainless Steel ◽  
Separation Efficiency ◽  
Chemical Vapor ◽  
Single Step ◽  
Water Mixture ◽  
Water Separation ◽  
Global Issues ◽  
Oil Water Separation ◽  
Oil Water ◽  
Closed Batch

Oil-spill is one of the major global issues facing society in this century. The aim of this study was to develop a steel-based membrane for selective separation of oil from oil/water mixture. For this purpose, a single-step, rapid and environmentally friendly closed-batch initiated chemical vapor deposition (iCVD) method was employed to deposit hydrophobic thin film on a stainless-steel mesh. Perfluorodecyl acrylate (PFDA) and tert-butyl peroxide (TBPO) were used as monomer and initiator, respectively. Owing to the inherent vapor-based nature of iCVD method provided excellent conformal coverage on the mesh with high durability. iCVD coated mesh showed 96% oil/water separation efficiency. Highly reproducible results were obtained when the oil/water separation experiments were repeated.

scholarly journals Functional Hydrophilic Membrane for Oil–Water Separation Based on Modified Bio-Based Chitosan–Gelatin

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1176
Author(s):  
Siti Zarina Zakuwan ◽  
Ishak Ahmad ◽  
Nurfaizah Abu Tahrim ◽  
Faizal Mohamed
Keyword(s):  
Separation Efficiency ◽  
Morphological Structure ◽  
Water Mixture ◽  
Scanning Calorimetry ◽  
Water Separation ◽  
Modified Chitosan ◽  
Oil Water Separation ◽  
Oil Water ◽  
The Stability ◽  
Hydrophilic Membrane

In this study, we fabricated a modified biomaterial based on chitosan and gelatin, which is an intrinsic hydrophilic membrane for oil–water separation to clean water contamination by oil. Modification of the membrane with a non-toxic natural crosslinker, genipin, significantly enhanced the stability of the biopolymer membrane in a water-based medium towards an eco-friendly environment. The effects of various compositions of genipin-crosslinked chitosan–gelatin membrane on the rheological properties, thermal stability, and morphological structure of the membrane were investigated using a dynamic rotational rheometer, thermogravimetry analysis, and chemical composition by attenuated total reflectance spectroscopy (ATR). Modified chitosan–gelatin membrane showed completely miscible blends, as determined by field-emission scanning electron microscopy, differential scanning calorimetry, and ATR. Morphological results showed membrane with establish microstructure to further experiment as filtration product. The membranes were successfully tested for their oil–water separation efficiencies. The membrane proved to be selective and effective in separating water from an oil–water mixture. The optimum results achieved a stable microporous structure of the membrane (microfiltration) and a separation efficiency of above 98%. The membrane showed a high permeation flux, generated as high as 698 and 420 L m−2 h−1 for cooking and crude oils, respectively. Owing to its outstanding recyclability and anti-fouling performance, the membrane can be washed away easily, ensuring the reusability of the prepared membrane.

scholarly journals Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 66
Author(s):  
Zhongjie Zhu ◽  
Lei Jiang ◽  
Jia Liu ◽  
Sirui He ◽  
Wei Shao
Keyword(s):  
Separation Efficiency ◽  
Dimensional Structure ◽  
Separation Performance ◽  
High Porosity ◽  
Water Mixture ◽  
Water Separation ◽  
Highly Efficient ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

scholarly journals Quartz Sand Filter Media with Special Wettability for Continuous and Efficient Oil/Water Separation and Dye Adsorption

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1083
Author(s):  
Bigui Wei ◽  
Xuying Luo ◽  
Xiaosan Song ◽  
Hanyue Guo ◽  
Liang Dai ◽  
...  
Keyword(s):  
Quartz Sand ◽  
Separation Efficiency ◽  
Dye Adsorption ◽  
Water Mixture ◽  
Water Separation ◽  
Separation Device ◽  
Oil Water Separation ◽  
Oil Water ◽  
Coconut Shell Powder ◽  
Filter Layer

For continuous and efficient oil/water separation and adsorption of dyes, coconut shell powder was grafted onto the surface of quartz sand by dip-coating method to make coconut shell powder-covered quartz sand filter media (CSQS) with superhydrophilic and underwater superoleophobic properties and superoleophilic and underoil highly hydrophobic properties. The contact angles of the underwater oil and underoil water with CSQS were more than 151.2° and 134.2°, respectively. A continuous oil/water separation device was designed. The separation device filled with CSQS can separate oil/water mixture (whether heavy or light oil) into water and oil at the same time with a separation efficiency of above 99.92%. The filter layer can be recovered through reverse extrusion even after lyophobic liquid penetrated the filter layer; hence, the separation efficiency of the filter layer was still above 99.99% for diesel and water mixture. Simultaneously, CSQS can effectively adsorb methylene blue with the highest removal rate as 98.94%. CSQS can maintain stable wettability under harsh environment conditions. This paper provides a new idea on continuous and efficient oil/water separation and simultaneous dye adsorption.

scholarly journals Mussel-Inspired Fabrication of PDA@PAN Electrospun Nanofibrous Membrane for Oil-in-Water Emulsion Separation

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3434
Author(s):  
Haodong Zhao ◽  
Yali He ◽  
Zhihua Wang ◽  
Yanbao Zhao ◽  
Lei Sun
Keyword(s):  
Separation Efficiency ◽  
Low Cost ◽  
Nanofibrous Membrane ◽  
Water Separation ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

Emulsified oily wastewater threatens human health seriously, and traditional technologies are unable to separate emulsion containing small sized oil droplets. Currently, oil–water emulsions are usually separated by special wettability membranes, and researchers are devoted to developing membranes with excellent antifouling performance and high permeability. Herein, a novel, simple and low-cost method has been proposed for the separation of emulsion containing surfactants. Polyacrylonitrile (PAN) nanofibers were prepared via electrospinning and then coated by polydopamine (PDA) by using self-polymerization reactions in aqueous solutions. The morphology, structure and oil-in-water emulsion separation properties of the as-prepared PDA@PAN nanofibrous membrane were tested. The results show that PDA@PAN nanofibrous membrane has superhydrophilicity and almost no adhesion to crude oil in water, which exhibits excellent oil–water separation ability. The permeability and separation efficiency of n-hexane/water emulsion are up to 1570 Lm−2 h−1 bar−1 and 96.1%, respectively. Furthermore, after 10 cycles of separation, the permeability and separation efficiency values do not decrease significantly, indicating its good recycling performance. This research develops a new method for preparing oil–water separation membrane, which can be used for efficient oil-in-water emulsion separation.

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