Facile Construction of Copper Mesh Surface from Superhydrophilic to Superhydrophobic for Various Oil-Water Separations

Abstract

Specially wettability materials offer a new pathway for effective oil-water separation. However, these materials with desired wettability, simple process and low cost as well as high efficiency separation are still urgently needed. Herein, facile strategies, acid etching and PDMS coating, were reported for the construction of copper mesh surfaces with special wettability from superhydrophilic to superhydrophobic. In the first acid etching, copper mesh surface exhibits a superhydrophilic and underwater superoleophobic properties, and the etched copper mesh with high separation efficiencies (92%) was obtained. After PDMS coating, a low adhesion superoleophilic and superhydrophobic copper mesh shows high -2-1 water contact angle of 153°, high flux (~31000 L*m *h ), excellent anti-icing and self-cleaning performances. Additionally, after UVB, mechanical wear, hot water and acid/alkaline solution treating, the coated mesh still showed excellent water-repellency performance. Moreover, the coated mesh by connecting with a vacuum pump was used for continuous oil-water separation. This work provides not only a simple and efficient method to fabricate controllable wettability copper mesh with oil-recovery ability but also a new opportunity for potential applications in continuous oil-water separation.

Peptide-Based Gel in Environmental Remediation: Removal of Toxic Organic Dyes and Hazardous Pb2+ and Cd2+ Ions from Wastewater and Oil Spill Recovery

“…[69][70][71][72][73] There are some materials and methods which are very effective towards oil spill and metal ions adsorption. [74][75][76][77][78][79][80][81] In this context, it is notable that hydrogels, due to their interstitial void spaces, can absorb dyes and heavy metal ions. Hydrogels can also be very usefulmaterialsin many other fields apart from the abovementionedapplications.…”

Time and volume‐ratio effect on reusable polybenzoxazole nanofiber oil sorption capacity investigated via machine learning

“…The intrusion pressure applied to the mat surface under the influence of gravity was calculated by Equation 7. 23 There was no water permeability in the mats at pressures below 10 kPa. At the end of 2 h, the highest water resistance (water rejection) was determined as 96% for PBO-E and PBO-S. Water resistance was determined as 93%, 92%, and 88% for PBO-D, PBO-T, and P, respectively.…”

“…The fabrication of functionalized materials, therefore, becomes important for the treatment of oil-contaminated water. In recent studies in this field, materials with high hydrophobic properties, such as PDMS coated superhydrophilic copper mesh, 23 amino carbon nanotube modified reduced graphene oxide aerogel, 24 nanocellulose-based composite materials that can be used in wastewater treatment as bio-based sorbents or precipitants 25 and encapsulation of camelina oil extract by tannic acid 26 have been studied in wastewater treatment and reuse. Materials with superhydrophobic and self-cleaning properties, also known as the "lotus effect", and low surface energy are significant in this regard.…”

Fabrication and characterization of a water purification system using activated carbon and graphene nanoplatelets: Toward the development of a nanofiltration matrix

“…Due to its adsorption properties, certain carbonbased materials such as activated carbon, carbon nanotubes, and graphene nanoplatelets have been researched as alternate tools for the removal of organic and inorganic contaminants from solutions (Ali et al, 2019) (Carvallho et al, 2016) (Song et al, 2018). Additionally, materials such as cellulose grafted SPI/hydroxyapatite, bacterial iron-oxide nanowires, kappa-Carrageenan beads, salecan polysaccharides, and copper mesh have also been investigated for water treatment/purification purposes (Salama, 2017) (Andjelkovic et al, 2017) (Mahdavinia et al, 2015) (Qi et al, 2018) (X. Zhang, Pan, et al, 2019.…”