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.

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.

A facile approach to silica-modified polysulfone microfiltration membranes for oil-in-water emulsion separation

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41323-41330 ◽  
Author(s):  
Qiao-Ling Gao ◽  
Fei Fang ◽  
Chen Chen ◽  
Xue-Yan Zhu ◽  
Jing Li ◽  
...  
Keyword(s):  
Filtration Efficiency ◽  
Water Separation ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Microfiltration Membranes ◽  
Oil Water ◽  
Underwater Superoleophobicity ◽  
Oil In Water Emulsion

A facile strategy to prepare silica-modified membranes with superhydrophilicity and underwater superoleophobicity was developed. These hybrid membranes can be applied in oil/water separation with high filtration efficiency and pressure endurance.

An oil/water separation nanofibrous membrane with a 3-D structure from the blending of PES and SPEEK

2019 ◽  
Vol 31 (5) ◽  
pp. 538-547 ◽  
Author(s):  
Qiong Du ◽  
Zheng Chen ◽  
Xiangyu Jiang ◽  
Jinhui Pang ◽  
Zhenhua Jiang ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Separation Process ◽  
Nanofibrous Membrane ◽  
Water Separation ◽  
Water Emulsion ◽  
High Mechanical Strength ◽  
Good Thermal Stability ◽  
Oil In Water ◽  
Oil Water Separation ◽  
Oil Water

A new nanofibrous membrane (NFM) was prepared by blending polyethersulfone (PES) and sulfonated poly(ether ether ketone) (SPEEK) via electrospinning. The membrane exhibits good thermal stability and high mechanical strength. The hydrophilicity of the membrane could be controlled by adjusting the mass ratio of PES to SPEEK. PES acts as the backbone fiber and provides high mechanical strength, while SPEEK provides hydrophilic functional groups due to the strong hydrophilicity of the sulfonic group. The test results show that the composite NFM integrates the advantages of the two polymers. Simple adjustment of the weight ratios of the two polymers can enable an adjustable flux so that the membrane can be used for different kinds of oil/water separation. The results show that NFMs can not only separate immiscible oil/water systems but also separate oil-in-water emulsions. The immiscible oil/water separation process was driven only by gravity and had a high flux of 1119.63 Lm−2 h−1. This separation process conserves energy, which is beneficial for environmental protection. The separation flux of the oil-in-water emulsion was 758.71 Lm−2 h−1 bar−1 based on measurements under different pressures, and the separation purity total organic carbon was below 50 ppm. This work indicates that a membrane comprised of PES and SPEEK has excellent performance and can be used in different fields.

Superhydrophilic and underwater superoleophobic nanofibrous membrane with hierarchical structured skin for effective oil-in-water emulsion separation

2017 ◽  
Vol 5 (2) ◽  
pp. 497-502 ◽  
Author(s):  
Jianlong Ge ◽  
Jichao Zhang ◽  
Fei Wang ◽  
Zhaoling Li ◽  
Jianyong Yu ◽  
...  
Keyword(s):  
Nanofibrous Membrane ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

A superwettable nanofibrous membrane with hierarchical structured skin for effective oil/water emulsion separation was fabricated via a combination of electrospinning and electrospraying.

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.

Robust superhydrophobic attapulgite coated polyurethane sponge for efficient immiscible oil/water mixture and emulsion separation

2016 ◽  
Vol 4 (40) ◽  
pp. 15546-15553 ◽  
Author(s):  
Jian Li ◽  
Changcheng Xu ◽  
Yan Zhang ◽  
Rongfang Wang ◽  
Fei Zha ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Mixture ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Polyurethane Sponge ◽  
Oil Water ◽  
Oil In Water Emulsion

The superhydrophobic PU sponges separated oils from immiscible oil/water mixture and oil-in-water emulsion with the separation efficiency over 99.8%.

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.

scholarly journals Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Hong ◽  
Zhu Liu ◽  
Yang Gao ◽  
Yubin Chen ◽  
Mingxun Zhuang ◽  
...  
Keyword(s):  
Large Scale ◽  
Separation Efficiency ◽  
Low Cost ◽  
Water Repellency ◽  
Dip Coating ◽  
Absorption Capacity ◽  
Photochromic Properties ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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