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.

Degradable dual superlyophobic lignocellulosic fibers for high-efficiency oil/water separation

2020 ◽  
Vol 22 (2) ◽  
pp. 504-512 ◽  
Author(s):  
Lei Kang ◽  
Bin Wang ◽  
Jinsong Zeng ◽  
Zheng Cheng ◽  
Jinpeng Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Condensation Reaction ◽  
Water Mixture ◽  
Water Separation ◽  
Lignocellulosic Fibers ◽  
Mixture Separation ◽  
Lignocellulosic Fiber ◽  
Oil Water Separation ◽  
Oil Water

A degradable dual lignocellulosic fiber with superwetting characteristics was successfully fabricated by a strategically adjusted condensation reaction of melamine and formaldehyde, maintaining high efficiency for oil/water mixture separation.

scholarly journals Magnetic porous graphene/multi-walled carbon nanotube beads from microfluidics: a flexible and robust oil/water separation material

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25334-25340 ◽  
Author(s):  
Zhipeng Bu ◽  
Linlin Zang ◽  
Yanhong Zhang ◽  
Xiaojian Cao ◽  
Liguo Sun ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Microfluidic Device ◽  
Water Mixture ◽  
Water Separation ◽  
Porous Graphene ◽  
Mixture Separation ◽  
Multi Walled Carbon Nanotube ◽  
Oil Water Separation ◽  
Oil Water

3D magnetic porous graphene/multi-walled carbon nanotube beads were fabricated by a modified microfluidic device for efficient, recyclable oil/water mixture separation.

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 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.

scholarly journals Fabrication of silica/PVA-co-PE nanofiber membrane for oil/water separation

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Yuanli Chen ◽  
Hui Fan ◽  
Xinlin Zha ◽  
Wenwen Wang ◽  
Yi Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Silicone Oil ◽  
Hydroxyl Groups ◽  
Water Mixture ◽  
Silica Nanospheres ◽  
Nanofiber Membrane ◽  
Water Separation ◽  
Oil Water Separation ◽  
Silica Nanostructures ◽  
Oil Water

AbstractHigh efficiency and anti-pollution oil/water separation membrane has been widely explored and researched. There are a large number of hydroxyl groups on the surface of silica, which has good wettability and can be used for oil-water separation membranes. Hydrophilic silica nanostructures with different morphologies were synthesized by changing templates and contents of trimethylbenzene (TMB). Here, silica nanospheres with radical pores, hollow silica nanospheres and worm-like silica nanotubes were separately sprayed on the PVA-co-PE nanofiber membrane (PM). The abundance of hydroxyl groups and porous structures on PM surfaces enabled the absorption of silica nanospheres through hydrogen bonds. Compared with different silica nanostructures, it was found that the silica/PM exhibited excellent super-hydrophilicity in air and underwater “oil-hating” properties. The PM was mass-produced in our lab through melt-extrusion-phase-separation technique. Therefore, the obtained membranes not only have excellent underwater superoleophobicity but also have a low-cost production. The prepared silica/PM composites were used to separate n-hexane/water, silicone oil/water and peanut oil water mixtures via filtration. As a result, they all exhibited efficient separation of oil/water mixture through gravity-driven filtration.

scholarly journals Dodecyl Mercaptan Functionalized Copper Mesh for Water Repellence and Oil-water Separation

2021 ◽  
Vol 18 (4) ◽  
pp. 887-899
Author(s):  
Yanling Tian ◽  
Jiekai Feng ◽  
Zexin Cai ◽  
Jiaqi Chao ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Synthesis Process ◽  
Water Separation ◽  
Oil Water Separation ◽  
One Step ◽  
Oil Water ◽  
Water Repellence ◽  
Copper Mesh ◽  
Dodecyl Mercaptan

AbstractReckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.

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