Functional surfaces with superhydrophobic and superoleophobic properties are of great interest in many applications. However, such surfaces are generally difficult to obtain. Although a few superamphiphobic surfaces have been developed recently, a challenge still remains in preparing such a surface with good durability which is a critical issue in practical application. In this study, we demonstrate a facile method for preparing durable superhydrophobic and highly oleophobic surfaces using two kinds of nanoparticles. Epoxy resin is used as the adhesive material to improve the wear resistance of the surfaces. ZnO nanoparticles and SiO2 nanoparticles are used to create high surface roughness. The prepared surfaces exhibit excellent superhydrophobicity and high oleophobicity once the nanoparticles are treated with 1 H,1 H,2 H,2 H-perfluorodecyltriethoxydsilane (FAS-17). Water and ethylene glycol contact angles of the coatings can reach up to 172 ? 2? and 157 ? 2?, respectively. After undergoing strong adhesive tape peeling and mechanical abrasion, the coatings still maintain good amphiphobicity.

Durable Self-Cleaning Surfaces with Superhydrophobic and Highly Oleophobic Properties

Robust superhydrophobic epoxy composite coating prepared by dual interfacial enhancement

Recent advances in synthesis and application of polymer nanocomposites for water and wastewater treatment

Superhydrophobic Coatings for Steel Pipeline Protection in Oil and Gas Industries: A Comprehensive Review

Preparation of Janus membrane based on biomimetic polydopamine interface regulation and superhydrophobic attapulgite spraying for on-demand oil-water emulsion separation

Preparation of new superhydrophobic and highly oleophobic polyurethane coating with enhanced mechanical durability

A surface to separate oil–water mixtures is a global concern and highly needed particularly in oil industries. The present study was conducted to create a novel superhydrophilic/superoleophobic nanocomposite coating on the stainless-steel mesh for the aim of oil/water separation. Different hydrophilic resins along with PFOA as oleophobic agent with 15 flours in its chemical structure and various oxide nanoparticles containing SiO2 and TiO2 at different concentrations were studied to achieve superhydrophilic/superoleophobic surface. The fabricated nanocomposites were fully characterized via field-emission scanning microscopy (FESEM), atomic force microscopy (AFM) and Fourier-transform infrared spectroscopy (FTIR). At the optimum concentration of resin and oxide nanoparticles, oil contact angle (OCA) and water contact angle (WCA) of 144° and 0° were achieved, respectively. The plausible mechanism of superhydrophilic/superoleophobic behavior of the coating is mainly associated with the micro-nano hierarchical structure of the coating owing to boosted roughness caused by the presence of SiO2 nanoparticles and their effective embedding into hydrophilic resin PDMS-NH2 and using metallic mesh substrate besides the reduced surface tension due to the using PFONa, strong bonding of the film to the substrate. Ultimately excellent oil/water separation efficiency of 96 ± 1% with high stability was attained.

A novel superhydrophilic/superoleophobic nanocomposite PDMS-NH2/PFONa-SiO2 coated-mesh for the highly efficient and durable separation of oil and water

Design and fabrication of a highly efficient, stable and durable new wettability coated stainless steel mesh for oil/water separation

The design and development of efficient approaches for water–oil separation have had widespread interest. Most previously introduced techniques and materials used for development of the successful separation of oily wastewater could not answer all the desired demands, such as being efficient and environmentally and economically friendly. Therefore, in seeking a novel method capable of answering these expectations, surfaces with special wettability were introduced. A novel, reusable, and recyclable superhydrophilic and superoleophobic poly(Vsim-Vim)@PFOA@SiO2 nanocomposite-coated stainless steel mesh was synthesized through a facile preparation process. Since the most important factors of these coatings are their oleophobicity and hydrophilicity values, the water contact angle (WCA) and the oil contact angle (OCA) were measured. The coating indicated the excellent characteristics in which the results showed that WCA was 0°, while OCA was 142°, which confirmed remarkable superhydrophilicity and superoleophobicity, respectively. It is worth mentioning that the coating owes its surface behavior mainly to the finer size of mesh and formation of silica, which causes the higher roughness and better oleophobicity, reduction of the surface energy of the synthesized poly(Vsim-Vim)@SiO2 nanocomposite by PFOA, the formation of hierarchical micro-nanometer scale roughness structures on the coating surface, and stable adhesion of SiO2 nanoparticles into poly(Vsim-Vim). Eventually, superb oil/water separation efficiency of 95% with high stability was attained. This result implied that the fabricated coating is a suitable candidate for water–oil emulsion separation which can potentially be employed in green industrial applications. Also, we believe this approach provides a potential application in controllable oil/water separation in large volumes.

Developing a new superhydrophilic and superoleophobic poly(4-(1-vinyl-1H-imidazol-3-ium-3-yl) butane-1-sulfonate): vinyl imidazole@Perfluorooctanoic acid@SiO 2 coated stainless steel mesh for highly efficient, stable, and durable oil/water separation

Setare Amirpoor

Papers

Preparation of new superhydrophobic and highly oleophobic polyurethane coating with enhanced mechanical durability

A novel superhydrophilic/superoleophobic nanocomposite PDMS-NH2/PFONa-SiO2 coated-mesh for the highly efficient and durable separation of oil and water

Design and fabrication of a highly efficient, stable and durable new wettability coated stainless steel mesh for oil/water separation

Developing a new superhydrophilic and superoleophobic poly(4-(1-vinyl-1H-imidazol-3-ium-3-yl) butane-1-sulfonate): vinyl imidazole@Perfluorooctanoic acid@SiO 2 coated stainless steel mesh for highly efficient, stable, and durable oil/water separation