Facile fabrication of superhydrophilic and underwater superoleophobic chitosan–polyvinyl alcohol-TiO2 coated copper mesh for efficient oil/water separation

You, Qiuying; Ran, Guoxia; Wang, Chan; Zhao, Yuan; Song, Qijun

doi:10.1007/s11998-017-0036-1

Cited by 22 publications

(10 citation statements)

References 53 publications

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“… 2 You et al reported that chitosan–PVA–TiO 2 -coated copper mesh still maintains its superhydrophobicity after 25 cycles of abrasion tests. 17 Furthermore, ultrasonification is also used to evaluate the durability of the TiO 2 –PVA sponge in ethanol for different times (i.e., 0–60 min). The results show that the contact angle on the TiO 2 –PVA sponge remains above 150° ( Figure S1 ), indicating its excellent superhydrophobicity and durability.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, Parsaie et al found that the contact angle of the superhydrophobic polyurethane (PU) sponge does not show obvious changes after 10 cycles of abrasion tests . You et al reported that chitosan–PVA–TiO 2 -coated copper mesh still maintains its superhydrophobicity after 25 cycles of abrasion tests . Furthermore, ultrasonification is also used to evaluate the durability of the TiO 2 –PVA sponge in ethanol for different times (i.e., 0–60 min).…”

Section: Resultsmentioning

confidence: 99%

“…Bio-inspired from lotus leaves and insects, superhydrophobic materials (contact angle >150° and contact angle hysteresis <10°) have been widely investigated for many promising applications, such as anti-icing, − anti-corrosion, sensor, self-cleaning, , drag reduction, and oil/water separation . In recent years, various superhydrophobic materials have been developed and utilized for efficient oil/water separation, including meshes, sponges, textiles, and filter papers . Among them, superhydrophobic porous materials show the most stable and efficient properties for oil/water separation because of their large surface area, light weight, high stability, and high porosity. , Superhydrophobic porous materials usually possess three-dimensional (3D) structures and overcome the drawback of pore plugging present in the two-dimensional oil/water separation materials.…”

Section: Introductionmentioning

confidence: 99%

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Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Shi

Kong

et al. 2022

ACS Omega

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Oily wastewater and oil spills pose a threat to the environment and human health, and porous sponge materials are highly desired for oil/water separation. Herein, we design a new superhydrophobic/superoleophilic TiO 2 -decorated polyvinyl alcohol (PVA) sponge material for efficient oil/water separation. The TiO 2 –PVA sponge is obtained by firmly anchoring TiO 2 nanoparticles onto the skeleton surface of pristine PVA sponge via the cross-linking reactions between TiO 2 nanoparticles and H 3 BO 3 and KH550, followed by the chemical modification of 1 H ,1 H ,2 H ,2 H -perfluorodecyltrichlorosilane. The as-prepared TiO 2 –PVA sponge shows a high water contact angle of 157° (a sliding angle of 5.5°) and an oil contact angle of ∼0°, showing excellent superhydrophobicity and superoleophilicity. The TiO 2 –PVA sponge exhibits excellent chemical stability, thermal stability, and mechanical durability in terms of immersing it in the corrosive solutions and solvents, boiling it in water, and the sandpaper abrasion test. Moreover, the as-prepared TiO 2 –PVA sponge possesses excellent absorption capacity of oils or organic solvents ranging from 4.3 to 13.6 times its own weight. More importantly, the as-prepared TiO 2 –PVA sponge can separate carbon tetrachloride from the oil–water mixture with a separation efficiency of 97.8% with the aid of gravity and maintains a separation efficiency of 96.5% even after 15 cyclic oil/water separation processes. Therefore, the rationally designed superhydrophobic/superoleophilic TiO 2 –PVA sponge shows great potential in practical applications of dealing with oily wastewater and oil spills.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Shi

Kong

et al. 2022

ACS Omega

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“…PVA has been used as a component to form underwater superoleophobic coatings. 28,29 In this paper, ChNFs and PVA were used to prepare coatings via casting method and cross-linked with glutaraldehyde (GA). It is hoped that surface roughness of the ChNFs/PVA blend coatings can be manipulated by adjusting the amount of ChNFs and in the meantime the bonding between the coating and substrate as well as among the ChNFs can be enhanced by adding appropriate amount of PVA.…”

Section: Introductionmentioning

confidence: 99%

“…Polyvinyl alcohol (PVA) is a water‐soluble polymer and has good film forming ability, transparency and adhesion. PVA has been used as a component to form underwater superoleophobic coatings 28,29 . In this paper, ChNFs and PVA were used to prepare coatings via casting method and cross‐linked with glutaraldehyde (GA).…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of transparent underwater superoleophobic coatings based chitin nanofibers and polyvinyl alcohol

Wang

Kou

et al. 2022

J of Applied Polymer Sci

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Transparent underwater superoleophobic coatings were prepared by blending chitin nanofibers (ChNFs) and polyvinyl alcohol (PVA) and then cross‐linked with glutaraldehyde (GA). The interactions among ChNFs, PVA, and GA in the coatings were analyzed via FT‐IR and XPS. Results of SEM observation and AFM analysis showed that higher concentrations of ChNFs and GA gave rise to rougher surface and lower transmittance of the coatings. By adjusting ratios of ChNFs, PVA, and GA, the coating surface could possess underwater superoleophobicity with oil (1, 2‐dichloroethane) contact angle up to 159.2° and slide angle ~3°, meanwhile, transmittance of the coatings in the wavelength range of 400–800 nm could be maintained between 40% and 90%. This work provides a new route to prepare environmentally friendly transparent underwater superoleophobic coatings.

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Cell Membrane Mimetic Coating for Excellent Antifouling, Antibacterial Corrosion, and Self‐Cleaning Separation of Massive Oil–Water Mixtures

Meng

Yao

et al. 2022

Adv Materials Inter

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is investigated as the most effective and promising oil-water separation approach owing to its simplicity, low cost, and the applicability to separate various oily waste waters. [6][7][8][9] However, the application of filtration membranes for treating huge amount high content oil-water mixture is still impeded by the following issues.The first issue is membrane fouling by contaminant adsorption and/or pore plugging by oil droplets, which causes a severe decline of the filtration flux. [10,11] Frequent water washing or chemical cleaning is required to restore the membrane flux, [11][12][13] though it reduces membrane lifespan and increases operation cost. Thus, it is very essential and urgent to develop strongly antifouling membranes, which can efficiently and rapidly separate oilwater mixtures. [14][15][16][17][18] Among various antifouling modification strategies, surface super-hydrophilization with zwitterionic polymers has been recognized as the most effective method, since zwitterionic material surfaces can form much denser ionic groups and tightly adsorbed water layer via electrostatic interactions. [18][19][20][21] The superhydrophilic membrane surfaces can strongly resist to the adsorption of proteins and other biomolecules, as well as the adhesion of bacterial cells, particulates and oil droplets from aqueous solutions. [20][21][22][23][24][25] The second issue is low filtration flux. Most of hydrophobic polymer membranes and even some modified metal mesh membranes have low filtration flux (100-2000 L m -2 h -1 ), which is unfavorable for massive oil-water separations. [12,26] Therefore, metal meshes with strong mechanical, superhydrophilic, antifouling properties, and extremely high flux (≥30 000 L m -2 h -1 ) are necessary for the filtration treatment of large amount oilwater mixture. Although zwitterionic polymers have been immobilized onto high flux stainless steel meshes (SSMs) by mussel inspired glue of polydopamine (PDA), [27,28] the hydrophilic polymer coating is easily detachable from the skeleton under harsh conditions due to the physical interaction of PDA. [29] The corrosion of the metal meshes by saline water, as well as by bacteria, is another challenging problem need to deal with. Oilfield waters and crude oil usually contain iron-oxidizing bacteria (IOB) and sulfate-reducing bacteria (SRB). [30,31] The adhesion of bacteria on metal surfaces is a crucial step in initiating microbiologically influenced corrosion. [32,33] More Massive oil-water mixtures produced from both industries and frequent oil spill incidents have threatened water ecosystems. A highly efficient separation membrane with ultrahigh filtration flux and excellent antifouling performance is created to deal with oil-water mixtures. The filtration membrane is fabricated by anchoring a phosphorylcholine copolymer (PMEN) on polydopamine (PDA)-precoated stainless steel mesh (SSM) surfaces, forming a durable cell outer membrane mimetic coating. The as-prepared SSM/PDA/PMEN membranes exhibit superhydrophilicity and high separation ...

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Facile fabrication of superhydrophilic and underwater superoleophobic chitosan–polyvinyl alcohol-TiO2 coated copper mesh for efficient oil/water separation

Cited by 22 publications

References 53 publications

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Fabrication and characterization of transparent underwater superoleophobic coatings based chitin nanofibers and polyvinyl alcohol

Cell Membrane Mimetic Coating for Excellent Antifouling, Antibacterial Corrosion, and Self‐Cleaning Separation of Massive Oil–Water Mixtures

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Facile fabrication of superhydrophilic and underwater superoleophobic chitosan–polyvinyl alcohol-TiO2 coated copper mesh for efficient oil/water separation

Cited by 22 publications

References 53 publications

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO2-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO2-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Fabrication and characterization of transparent underwater superoleophobic coatings based chitin nanofibers and polyvinyl alcohol

Cell Membrane Mimetic Coating for Excellent Antifouling, Antibacterial Corrosion, and Self‐Cleaning Separation of Massive Oil–Water Mixtures

Contact Info

Product

Resources

About

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation