Reusable membrane with multifunctional skin layer for effective removal of insoluble emulsified oils and soluble dyes

Li, Hui; Zhang, Jianqiang; Zhu, Lei; Liu, Hailong; Yu, Shifan; Xue, Jinwei; Zhu, Xu; Xue, Qingzhong

doi:10.1016/j.jhazmat.2021.125677

Cited by 101 publications

(21 citation statements)

References 39 publications

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“…Hydrophilic-underwater oleophobic membranes are often used for oil-in-water mixtures, while hydrophobic–oleophilic membranes are typically applied to separating water-in-oil mixtures. Many researchers have applied electrospun nanofibers with designed modifications to separate different oil/water mixtures. − …”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Guo

Zhou

et al. 2022

ACS Appl. Nano Mater.

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The demand for oil cleanup is one of the most urgent issues and has been involved in global sustainable and green economic development. Existing industrial separation techniques are inefficient and time-consuming, and flexible membranes with selective wettability are currently advantageous for oil/water separation. Here, we report an effectual strategy to prepare composite membranes by combining covalent organic frameworks (COFs) with electrospun nanofibers for oil/water separation. A dip-coating strategy was developed to prepare two different Schiff base COFs [2,4,6-triformylphloroglucinol−4,4′diaminobiphenyl (Tp-BD) and 3,5-tris(4-aminophenyl)benzene−terephthalaldehyde (TAPB-TPA)] on polyacrylonitrile (PAN) nanofibers at room temperature, in which Tp-BD and TAPB-TPA COFs could grow in situ on the surface of single-lined PAN nanofibers, structurally forming rough structures on the nanoscale. The thickness of the COF layer could be controlled by the concentration and volume of the ligand solution. Furthermore, on the basis of the rough structure, lauryl groups were linked to COF nanofibers to simultaneously obtain excellent hydrophobic COF nanofibers and maintain oleophilicity. Finally, superhydrophobic PAN/COF nanofibers with a water contact angle of 167°were applied to separate water-in-oil mixtures. The separation efficiencies of different samples with different oil and water concentrations were all greater than 95%, and the recycling performances of the materials were also satisfactory. The results show that the as-prepared nanofiber membranes have great potential for separating water-in-oil mixtures.

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Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Guo

Zhou

et al. 2022

ACS Appl. Nano Mater.

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“…Calcium alginate hydrogel provided a matrix for polyaniline/sawdust [ 86 ]. A supporting polymer was also introduced when the adsorbent was a part of a membrane [ 40 , 74 , 76 , 79 , 83 , 84 , 85 ].…”

Section: Polyaniline Adsorbentsmentioning

confidence: 99%

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

Stejskal

2022

Polymers

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Water pollution by organic dyes, and its remediation, is an important environmental issue associated with ever-increasing scientific interest. Conducting polymers have recently come to the forefront as advanced agents for removing dye. The present review reports on the progress represented by the literature published in 2020–2022 on the application of conducting polymers and their composites in the removal of dyes from aqueous media. Two composites, incorporating the most important polymers, polyaniline, and polypyrrole, have been used as efficient dye adsorbents or photocatalysts of dye decomposition. The recent application trends are outlined, and future uses also exploiting the electrical and electrochemical properties of conducting polymers are offered.

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“…Bioinspired from plants and insects, superhydrophobic surfaces (SHSs) (contact angle >150° and contact angle hysteresis <10°) have aroused much attention because of their great potential applications in self-cleaning, , antifouling, anti-icing, − and oil/water separation . As for oil/water separation, superhydrophilic/underwater superoleophobic “water removal” materials and superhydrophobic/superoleophilic “oil removal” materials have been rationally designed on various substrates, including papers, meshes, membranes, − sponges, , cotton, areogels, and textiles . Among these substrates, cellulosic paper-based materials are sustainable and abundant in nature.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Shi

Gao

et al. 2022

Langmuir

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Oceanic oil spill and the discharge of industrial oily wastewaters can cause significant threats to the ecological environment and human health. Herein, we design a durable TiO 2 /PDA-based superhydrophobic paper for efficient oil/water separation. Bioinspired from mussel adhesive proteins, the mechanical durability of the asprepared superhydrophobic paper is enhanced by the deposition of polydopamine (PDA) onto cellulosic fibers via self-polymerization of dopamine. The TiO 2 /PDA-based superhydrophobic paper shows a high water contact angle of 168.2°and an oil contact angle of ∼0°, exhibiting excellent superhydrophobicity and superoleophilicity. Furthermore, the asprepared superhydrophobic paper possesses excellent chemical stability, thermal stability, and mechanical durability in terms of being immersed in corrosive solutions and solvents and boiling water and being subjected to the sandpaper abrasion test, respectively. More importantly, the separation efficiency of the TiO 2 /PDA-based superhydrophobic paper for an oil/water mixture is 97.2%, and it maintains a separation efficiency above 94.3% even after 15 cyclic separation processes. Furthermore, the separation efficiency for water-in-oil emulsions is higher than 93.7% after 15 cyclic separation tests, showing its excellent recyclable stability for water-in-oil emulsions. Therefore, the rationally designed TiO 2 /PDA-based superhydrophobic paper shows great potential in the practical applications of self-cleaning, antifouling, and oil/water separation.

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Reusable membrane with multifunctional skin layer for effective removal of insoluble emulsified oils and soluble dyes

Cited by 101 publications

References 39 publications

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

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Reusable membrane with multifunctional skin layer for effective removal of insoluble emulsified oils and soluble dyes

Cited by 101 publications

References 39 publications

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

Mussel-Inspired Durable TiO2/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Contact Info

Product

Resources

About

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties