High-performance PVDF membranes prepared by the combined crystallisation and diffusion (CCD) method using a dual-casting technique: a breakthrough for water treatment applications

Shah, Vatsal; Wang, Bo; Li, K.

doi:10.1039/d1ee02009a

Cited by 30 publications

(6 citation statements)

References 41 publications

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“…Among several materials used for the fabrication of polymer-based environmental sensors, PVDF is one of the most commonly used due not only to its excellent mechanical strength and high thermal and chemical resistance but also because this polymer withstands chlorine disinfection. 213 Aiming to evaluate random environmental vibrations (such as wind flow, waterfall, or transportation of vehicles), a large area, highly sensitive, and flexible pressure sensor has been produced based on electrospun Ce 3+ /PVDF/Gr composite nanofibers. 214 The developed Ce 3+ /PVDF/Gr composite sensing device could detect pressure as low as ∼2 Pa with high sensitivity (30 mV•Pa −1 ).…”

Section: Piezoelectric Sensorsmentioning

confidence: 99%

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Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Costa,

Cardoso,

Martins

et al. 2023

Chem. Rev.

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From scientific and technological points of view, poly(vinylidene fluoride), PVDF, is one of the most exciting polymers due to its overall physicochemical characteristics. This polymer can crystalize into five crystalline phases and can be processed in the form of films, fibers, membranes, and specific microstructures, being the physical properties controllable over a wide range through appropriate chemical modifications. Moreover, PVDF-based materials are characterized by excellent chemical, mechanical, thermal, and radiation resistance, and for their outstanding electroactive properties, including high dielectric, piezoelectric, pyroelectric, and ferroelectric response, being the best among polymer systems and thus noteworthy for an increasing number of technologies. This review summarizes and critically discusses the latest advances in PVDF and its copolymers, composites, and blends, including their main characteristics and processability, together with their tailorability and implementation in areas including sensors, actuators, energy harvesting and storage devices, environmental membranes, microfluidic, tissue engineering, and antimicrobial applications. The main conclusions, challenges and future trends concerning materials and application areas are also presented.

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Section: Piezoelectric Sensorsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Costa,

Cardoso,

Martins

et al. 2023

Chem. Rev.

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“…Despite the significant potential of ultrathin polymeric films in reducing the device thickness and maintaining high wearable performance, there remains certain limitations. One critical issue is that soft tissue generally has a coarse, irregular surface [9], such as microscale lines and folds on the skin surface, and commonly used, thin polymeric substrates for flexible devices, such as polyethylene terephthalate (PET) [10][11][12], polyvinylidene fluoride (PVDF) [13][14][15], and polyimide (PI) [16][17][18], cannot completely fit the microscopic irregular landscape. This induces the air gap between the devices and skin surface, hampering the formation of ideal skin-device interface and limiting the precise monitoring of bio-electric signals [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Microfluidic-Based Continuous Fabrication of Ultrathin Hydrogel Films with Controllable Thickness

et al. 2023

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Ultrathin hydrogel films composed of cross-linked polymer networks swollen by water, with soft and moisturized features similar to biological tissue, play a vital role in flexible biosensors and wearable electronics. However, achieving efficient and continuous fabrication of such films remains a challenge. Here, we present a microfluidic-based strategy for the continuous fabrication of free-standing ultrathin hydrogel films by using laminar flow, which can be precisely controlled in the micrometer scale. Compared with conventional methods, the microfluidic-based method shows advantages in producing hydrogel films with a high homogeneity as well as maintaining the structural integrity, without the need of supporting substrates and sophisticated equipment. This strategy allows the precise control over the thickness of the hydrogel films ranging from 15 ± 0.2 to 39 ± 0.5 μm, by adjusting the height of the microfluidic channels, with predictable opportunities for scaling up. Therefore, our strategy provides a facile route to produce advanced thin polymer films in a universal, steerable, and scalable manner and will promote the applications of thin polymer films in biosensors and wearable electronics.

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“…Membrane separation technology has been widely recognized as a promising strategy for diverse wastewater purification because of its low energyconsumption and environment friendliness. [5][6][7][8] Utilizing the size sieving mechanism, nanofiltration membrane could remove micro-sized oil droplets, [9][10][11][12] dyes, [13][14][15][16][17] and heavy metal ions [18][19][20] from water. However, fouling and clogging are inevitable problems for such narrow-pore-sized membrane.…”

Section: Introductionmentioning

confidence: 99%

Achieving Three Things at One Stroke: Separation of Oil/Water Emulsion Simultaneously Absorption of Heavy Metal Ion and Dyes by One Multifunctional Superhydrophilic Coating Membrane

Wang,

Guan,

Yang

et al. 2023

Preprint

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Adsorption and separation are the most important chemical engineering processes for wastewater treatment. Exerting microfiltration membranes as the central separation technology and decorated it with absorption property, forming absorptive-membranes, result in the separation and purification of diverse wastewaters in an energy-efficient manner. Herein, a versatile polyanionic coating with superhydrophilicity/underwater superoleophobicity, superior anti-oil-fouling, and efficient charges is acquired through mussel-inspired co-deposition, followed by b-PEI functionalization, N-alkylation, and anionization. Thanks to the superhydrophilicity/underwater superoleophobicity, the as-prepared microfiltration membrane achieves selective separation of oil/water emulsions. Meanwhile, the functional membranes exhibited excellent selective and efficient adsorption capacity for organic dyes and heavy metal ions due to the abundant surface charges. Interestingly, benefiting from superhydrophilicity and considerable surface charges, the as-designed microfiltration membrane can realize selective and efficient simultaneously adsorption and separation of wastewaters with complicated components, including oil/water emulsions, organic dyes, and heavy metal ion by the concept of “achieving three things at one stroke”. Such a versatile and feasible strategy could pave a new path for constructing multifunctional membranes for complex wastewater treatment and purification.

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High-performance PVDF membranes prepared by the combined crystallisation and diffusion (CCD) method using a dual-casting technique: a breakthrough for water treatment applications

Abstract: One of the most commonly used membranes for water treatment applications are polyvinylidene fluoride (PVDF) membranes prepared by the non-solvent induced phase separation (NIPS) method. Unfortunately, these membranes suffer from...

Cited by 30 publications

References 41 publications

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Microfluidic-Based Continuous Fabrication of Ultrathin Hydrogel Films with Controllable Thickness

Achieving Three Things at One Stroke: Separation of Oil/Water Emulsion Simultaneously Absorption of Heavy Metal Ion and Dyes by One Multifunctional Superhydrophilic Coating Membrane

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