Antifouling enhancement of polyacrylonitrile-based membrane grafted with poly(sulfobetaine methacrylate) layers

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jianlong Hu ◽  
Xuanren Zhu ◽  
Deqiong Xie ◽  
Xianya Peng ◽  
Meng Zhu ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Separation Efficiency ◽  
Membrane Surface ◽  
Surface Grafting ◽  
Water Emulsion ◽  
Oil In Water ◽  
Oil Adsorption ◽  
Grafting Copolymerization ◽  
Oil In Water Emulsion ◽  
Oil Fouling

Abstract In this work, zwitterionic polyacrylonitrile (PAN)-based membranes were synthesized via surface grafting strategy for improving the antifouling properties. The copolymer membrane consisting of PAN and poly(hydroxyethyl methacrylate) segments, was cast via nonsolvent induced phase separation, and then treated with acryloyl chloride to tether with carbon-carbon double bonds. Zwitterionic poly(sulfobetaine methacrylate) (PSBMA) layers were grafted onto membrane surface via concerted reactions of radical grafting copolymerization and quaternization with 2-(dimethylamino)ethyl methacrylate) and 1, 3-propanesultone (1, 3-PS) as the monomers. The grafting degree (GD) of PSBMA layers increases with the incremental content of monomers, leading to the enhancement in membranes surface hydrophilicity. The permeation experiments show that the flux of the zwitterionic membrane increases and then decreases with the increasing GD value, because of the surface coverage of PSBMA layers. The zwitterionic membrane has excellent separation efficiency for oil-in-water emulsion, with the rejection of a higher value than 99%. The irreversible membrane fouling caused by oil adsorption has been suppressed, as proved by the cycle-filtration tests. These outcomes confirm that oil-fouling resistances of membranes are improved obviously by the surface grafting of zwitterionic PSBMA layers.

scholarly journals Novel Polymer Material for Efficiently Removing Methylene Blue, Cu(II) and Emulsified Oil Droplets from Water Simultaneously

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1393 ◽  
Author(s):  
Jie Cao ◽  
Jianbei Zhang ◽  
Yuejun Zhu ◽  
Shanshan Wang ◽  
Xiujun Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Separation Efficiency ◽  
Crosslinking Agent ◽  
Cost Effective ◽  
Preparation Process ◽  
Water Emulsion ◽  
Practical Applications ◽  
Oil In Water ◽  
Oil In Water Emulsion ◽  
Oil Fouling

The pollution of water resources has become a worldwide concern. The primary pollutants including insoluble oil, toxic dyes, and heavy metal ions. Herein, we report a polymer adsorbent, named SPCT, to remove the above three contaminants from water simultaneously. The preparation process of SPCT contains two steps. Firstly, a hydrogel composed of sulfonated phenolic resin (SMP) and polyethyleneimine (PEI) was synthesized using glutaraldehyde (GA) as the crosslinking agent, and the product was named SPG. Then SPCT was prepared by the reaction between SPG and citric acid (CA) at 170 ∘ C. SPCT exhibited an excellent performance for the removal of methylene blue (MB) and Cu(II) from aqueous solution. For a solution with a pollutant concentration of 50 mg L−1, a removal efficiency of above 90% could be obtained with a SPCT dosage of 0.2 g L−1 for MB, or a SPCT dosage of 0.5 g L−1 for Cu(II), respectively. SPCT also presented an interesting wettability. In air, it was both superhydrophilic and superoleophilic, and it was superoleophobic underwater. Therefore, SPCT could successfully separate oil-in-water emulsion with high separation efficiency and resistance to oil fouling. Additionally, SPCT was easily regenerated by using dilute HCl solution as an eluent. The outstanding performance of SPCT and the efficient, cost-effective preparation process highlight its potential for practical applications.

scholarly journals Membrane surface properties and their effects on real waste oil-in-water emulsion ultrafiltration

Water SA ◽  
2019 ◽  
Vol 45 (3 July) ◽  
Author(s):  
Marjana Simonič
Keyword(s):  
Surface Properties ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Cross Flow ◽  
Influential Factors ◽  
Permeate Flux ◽  
Chemical Cleaning ◽  
Water Emulsion ◽  
Oil In Water ◽  
Oil In Water Emulsion

Membrane surface properties and their effect on the efficiency of ultrafiltration (UF) of real waste oily emulsions was studied. Experiments were performed in cross-flow operation at total recycle condition in a lab-scale system. The ceramic UF membrane in the tubular type module was employed. During the experiments permeate flux was measured. The most important influential factors, such as temperature, TMP, and pH, were considered during the experiments. Zeta potential was measured in order to explain the phenomena on the membrane surface. The isoelectric point of the fouled membrane was shifted to the alkaline range. COD removal efficiency reached 89%. Gas chromatography measurements were performed in order to determine the composition of waste emulsions. SEM micrographs showed the formation of calcite on the membrane, which contributed to membrane fouling. Chemical cleaning was examined using alkaline and acid solutions, and a cleaning strategy was determined.

scholarly journals Superhydrophilic fluorinated polyarylate membranes via in situ photocopolymerization and microphase separation for efficient separation of oil-in-water emulsion

RSC Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 958-962 ◽  
Author(s):  
Hui Li ◽  
Cuiping Zhou ◽  
Chunsheng Li ◽  
Xiaohui Li ◽  
Shuxiang Zhang
Keyword(s):  
Tensile Strength ◽  
Separation Efficiency ◽  
Microphase Separation ◽  
High Tensile Strength ◽  
Water Emulsion ◽  
Efficient Separation ◽  
Oil In Water ◽  
Oil In Water Emulsion ◽  
High Separation

We have developed a novel superhydrophilic FPAR membrane with high tensile strength by in situ photocopolymerization and microphase separation, which can effectively separate oil-in-water emulsions with high separation efficiency and flux.

scholarly journals In-situ self-dissolving and regenerating synthesis of superwetting cotton fabric with excellent oil/water emulsions separation performance

2021 ◽  
Author(s):  
Sudong Yang ◽  
Lin Chen ◽  
Shanshan Wang ◽  
Shuai Liu
Keyword(s):  
Cotton Fabric ◽  
Separation Efficiency ◽  
Separation Performance ◽  
Hydrophilic Surface ◽  
Water Emulsion ◽  
Oil In Water ◽  
Underwater Superoleophobicity ◽  
Oil In Water Emulsion ◽  
Fabric Surface

Abstract The textiles with superhydrophilicity and underwater superoleophobicity have shown excellent separation performance for emulsified oil in wastewater, but they still suffer from complicated construct of hierarchical architectures and hydrophilic surface. Herein, a hydrophilic hierarchical layer of cellulose is constructed on commercial cotton fabric surface via a proposed in-situ self-dissolving and regenerating strategy. The cellulose provides both hydrophilic surface and hierarchical structural foundation for the remodeled cotton fabric (RCF) without any further chemical modification. The obtained RCF has strong superhydrophilicity, underwater superoleophobicity, and anti-oil-adhesion property, which can be applicable for efficient oil-in-water emulsion separation with high separation efficiency and recyclable antifouling performance. The developed RCF assembly strategy provides an excellent membrane for the separation of oil-in-water emulsion, and a new prospect for the convenient and universal construct of other superwetting cellulose-based materials.

Ultralight free-standing reduced graphene oxide membranes for oil-in-water emulsion separation

2015 ◽  
Vol 3 (40) ◽  
pp. 20113-20117 ◽  
Author(s):  
Na Liu ◽  
Miao Zhang ◽  
Weifeng Zhang ◽  
Yingze Cao ◽  
Yuning Chen ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Free Standing ◽  
Water Emulsion ◽  
Oil In Water ◽  
Reduced Graphene ◽  
Emulsion Separation ◽  
Oil In Water Emulsion ◽  
Oxide Membranes ◽  
High Separation ◽  
Graphene Oxide Membranes

Ultralight free-standing RGO membranes are capable of separating multiple types of surfactant stabilized oil-in-water emulsions with high separation efficiency.

Understanding membrane fouling by oil-in-water emulsion via experiments and molecular dynamics simulations

2018 ◽  
Vol 566 ◽  
pp. 140-150 ◽  
Author(s):  
Melike Begum Tanis-Kanbur ◽  
Sadiye Velioğlu ◽  
Henry J. Tanudjaja ◽  
Xiao Hu ◽  
Jia Wei Chew
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Membrane Fouling ◽  
Water Emulsion ◽  
Oil In Water ◽  
Dynamics Simulations ◽  
Oil In Water Emulsion
Sign in / Sign up

Export Citation Format

Share Document