Magnetoactive Superhydrophobic Foams for Oil-Water Separation

2012 ◽  
Vol 77 ◽  
pp. 159-164 ◽  
Author(s):  
Paola Calcagnile ◽  
Despina Fragouli ◽  
Ilker S. Bayer ◽  
George C. Anyfantis ◽  
Athanassia Athanassiou
Keyword(s):  
Iron Oxide ◽  
Superparamagnetic Iron Oxide ◽  
Water Repellent ◽  
Oil Absorption ◽  
Absorption Mechanism ◽  
Colloidal Iron ◽  
Water Separation ◽  
Magnetically Actuated ◽  
Oil Water Separation ◽  
Colloidal Iron Oxide

A novel composite material for the efficient separation of oil from water is presented. It is based on polyurethane (PU) foams modified with colloidal superparamagnetic iron oxide nanoparticles (NPs) in their whole volume and sub-micrometer polytetrafluoroethylene (PTFE) particles on their surface. The hydrophobic and oleophobic original foam becomes water-repellent and oil-absorbing due to the presence of the PTFE particles on its surface. The oil absorption rate is significantly increased by the presence of the colloidal iron oxide NPs. Detailed analysis demonstrates that the NP capping molecules play a significant role in the oil absorption mechanism. Furthermore, the treated foams can be magnetically actuated, and be moved towards oil polluted waters by a weak magnet. As a result, they can absorb the oil contaminants from the water surface, purifying it.

Fabrication of robust 3D superhydrophobic material by a simple and low-cost method for oil-water separation and oil absorption

2017 ◽  
Vol 224 ◽  
pp. 117-124 ◽  
Author(s):  
Chuqi Zhang ◽  
Yanmei Li ◽  
Ningning Bai ◽  
Cui Tan ◽  
Peng Cai ◽  
...  
Keyword(s):  
Low Cost ◽  
Oil Absorption ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

A robust and stretchable superhydrophobic PDMS/PVDF@KNFs membrane for oil/water separation and flame retardancy

Nanoscale ◽  
2018 ◽  
Vol 10 (14) ◽  
pp. 6695-6703 ◽  
Author(s):  
Deke Li ◽  
Xuelian Gou ◽  
Daheng Wu ◽  
Zhiguang Guo
Keyword(s):  
Flame Retardancy ◽  
Oil Absorption ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Flame Retardation

A robust superhydrophobic PDMS/PVDF@KNFs membrane with excellent properties of deformation, stretchability, flame retardation, oil/water separation and oil absorption.

Silk fibroin-graphene oxide functionalized melamine sponge for efficient oil absorption and oil/water separation

2019 ◽  
Vol 497 ◽  
pp. 143762 ◽  
Author(s):  
Jian Zhou ◽  
Yan Zhang ◽  
Yongqiang Yang ◽  
Zhenfei Chen ◽  
Guangwen Jia ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Silk Fibroin ◽  
Oil Absorption ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

scholarly journals Fabrication of PDMS/GA Composite Materials by Pickering Emulsion Method and Its Application for Oil-Water Separation

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5283
Author(s):  
Biao Wang ◽  
Qingwang Liu ◽  
Zhenzhong Fan ◽  
Ting Liang ◽  
Qilei Tong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Organic Solvent ◽  
Functional Groups ◽  
Pickering Emulsion ◽  
Economic Benefits ◽  
Oil Absorption ◽  
Water Separation ◽  
Modified Graphene Oxide ◽  
Oil Water Separation ◽  
Oil Water

With the intensification of human activities, a large amount of oil and organic solvent waste has been created, resulting in serious ecological and environmental pollution. Therefore, how to balance environmental benefits and economic benefits control a large number of organic solvent and oil pollution is an urgent problem. To solve this problem, a highly efficient oil-water separation material was designed and prepared in this paper. Graphene oxide aerogels were synthesized by the Pickering emulsion and hydrothermal method, and then hydrophobically lipophilic polydimethylsiloxane (PDMS) reduced graphene oxide aerogel composites (PDMS/GA) were obtained by modification of PDMS. The surface functional groups, hydrophobicity, thermal stability, and micromorphology of the materials were tested by various characterization methods. Their properties were tested by an oil absorption test and repeated experiments. The oil absorption performance experiments and repeated performance experiments of PDMS/GA are reported. The number of oxy-gen-containing functional groups of the modified graphene oxide (GO) decreased, and the contact angle of water was 134.4°. The adsorption capacity of n-hexane was up to 18.5 times its own weight. The material has the advantages of being lightweight, easy to recover, good hydrophobicity and lipophilicity, and has the potential for large-scale applications in the field of oil-water separation.

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