Green Fabrication of Underwater Superoleophobic Biopolymeric Nanofibrous Membranes for Effective Oil–Water Separation

Oh, Subin; Bang, Junsik; Jin, Hyoung‐Joon; Kwak, Hyo Won

doi:10.1007/s42765-022-00251-7

Cited by 33 publications

(5 citation statements)

References 50 publications

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“…Nanofibers, in particular, have been discovered to cover surfaces, effectively forming firm surface roughness. 84,92 Oh et al 93 also electrospun a fiber layer with a beaded structure on an electrospun nanofiber film with homogeneous pores prepared by an electrospinning machine. The same material was used for both layers.…”

Section: Superhydrophobic and Superoleophilic Fibrous Filter Materialsmentioning

confidence: 99%

Bionic multifunctional fibrous materials for efficient oil/water separation

Guo

Liu

2023

Droplet

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Special wettability fibrous materials have received a lot of attention because of their good connectivity, mechanical flexibility, large specific surface area, and ease of shape manipulation. Their outstanding performance paves the way toward efficient oil/water separation in a variety of environments and for separation requirements. This paper discusses the distinct advantages, challenges, and future research directions of various substrates for fibrous materials, such as nonwoven natural biomass fibers, fabrics, electrospinning fibers, metallic fibers, and inorganic nonmetallic fibers. The special wettability fibrous filter materials and fibrous adsorbents are summarized based on the different separation methods.The principles of preparation of various special wettabilities are introduced, and the unique advantages of fibrous adsorbents are emphasized. The preparation strategy of fibrous filter materials is discussed, as well as some representative work and research progress. The benefits, drawbacks, and research directions in terms of various materials are examined. This article emphasizes the pollution resistance of fibrous filter materials and the elasticity of fibrous adsorbents. Finally, the prospects in terms of the problems, challenges, and future development of special wettability fibrous materials used in oil/water separation are discussed.

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Section: Superhydrophobic and Superoleophilic Fibrous Filter Materialsmentioning

confidence: 99%

Bionic multifunctional fibrous materials for efficient oil/water separation

Guo

Liu

2023

Droplet

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“…Traditional methods for treating oil-contaminated wastewater, such as biological treatment, membrane separation, flocculation, air flotation, gravity separation and adsorption etc., have been reported [7][8][9][10][11][12][13][14][15]. Among them, the membrane separation method attracts tremendous attention in oil/water separation because of its high separation efficiency, wide application range and easy operation [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The Design of PAN-Based Janus Membrane with Adjustable Asymmetric Wettability in Wastewater Purification

Wang,

Huang,

Zhang

et al. 2024

Materials

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In this paper, an environmentally friendly polyacrylonitrile-based (PAN-based) composite membrane with a Janus structure for wastewater treatment was successfully fabricated. To achieve the optimum adsorption of PAN-based Janus composite membrane, the asymmetric wettability was regulated through electrospinning, resulting in TiO2 modifying PAN as the hydrophilic substrate layer, and PCL gaining a different thickness as the hydrophobic layer. The prepared Janus composite membrane (PAN/TiO2-PCL20) showed excellent oil/water separation performance for diverse surfactant-stabilized oil-in-water emulsions. For n-hexane-in-water emulsion, the permeate flux and separation efficiency reached 1344 L m−2 h−1 and 99.52%, respectively. Even after 20 cycles of separation, it still had outstanding reusability and the separation efficiency remained above 99.15%. Meanwhile, the PAN/TiO2-PCL20 also exhibited an excellent photocatalytic activity, and the removal rate for RhB reached 93.2%. In addition, the research revealed that PAN/TiO2-PCL20 possessed good mechanical property and unidirectional water transfer capability. All results indicated that PAN/TiO2-PCL20 with photocatalysis and oil/water separation performance could be used for practical complex wastewater purification.

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“…In order to effectively address these issues, hierarchically porous materials with biomimetic cellular structures observed in many plants and animals − provide inspiration for the design of multifunctional sponge-like elastic absorbents with high oil–water separation performance. Compared to macroporous sponges, covalent cross-linked polymer networks with microporous structures and intense interactions among chains could promise high elasticity and fatigue resistance, since uniform covalent networks with energy dissipation are not easy to be damaged or destructed. , Moreover, based on previous research, hierarchically porous materials prepared by templating water-in-oil (w/o) Pickering high internal phase emulsions (HIPE) demonstrated excellent oil retention rate, − in which their large pores can absorb and store oil, while the smaller inner pores act as cell walls that physically isolate and trap internal oil within them, thereby improving the overall oil retention rate.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Hyperporous Elastic Material with Excellent Fatigue Resistance and Oil Retention for Oil–Water Separation

Lin,

Niu,

Jiang

et al. 2024

Langmuir

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Oily wastewater has caused serious threats to the environment; thus, high-performance absorbing materials for effective oil−water separation technology have attracted increasing attention. Herein, we develop a magnetic, hydrophobic, and lipophilic hyperporous elastic material (HEM) templated by high internal phase emulsions (HIPE), in which free-radical polymerization of butyl acrylate (BA) and divinylbenzene (DVB) is employed in the presence of poly(dimethylsiloxane) (PDMS), lecithin surfactant, and modified Fe 3 O 4 nanoparticles. The adoption of the emulsion template with nanoparticles as both stabilizers and cross-linkers endows the HEM with biomimetic hierarchical open-cell micropores and elastic cross-linked networks, generating an oil absorbent with outstanding mechanical stability. Compressive fatigue resistance of the HEM is demonstrated to endure 2000 mechanical cycles without plastic deformation or strength degradation. By exploiting the synergistic effect of hierarchical structures and low-surface-energy components, the resulting HEM also possesses excellent and robust hydrophobicity (water contact angle of 164°) and good oil absorption capacity, in which Fe 3 O 4 nanoparticles lead to convenient magnetically controlled oil recyclability as well. Notably, the unique biomimetic microporous structure demonstrates superior oil retention capacity (>95% at 1000 rpm and >60% at 10,000 rpm) over the state-of-the-art porous materials for a diverse variety of oils to reduce the risk of secondary oil leakage, along with good recoverability by squeezing owing to the excellent compression resilience. These excellent performances of our HEM provide broad prospects for practical applications in oil−water separation, energy conversion, and smart soft robotics.

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Green Fabrication of Underwater Superoleophobic Biopolymeric Nanofibrous Membranes for Effective Oil–Water Separation

Cited by 33 publications

References 50 publications

Bionic multifunctional fibrous materials for efficient oil/water separation

Bionic multifunctional fibrous materials for efficient oil/water separation

The Design of PAN-Based Janus Membrane with Adjustable Asymmetric Wettability in Wastewater Purification

Magnetic Hyperporous Elastic Material with Excellent Fatigue Resistance and Oil Retention for Oil–Water Separation

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