Production and characterization of piezo-electric membranes

Coster, H.G.L.; Farahani, T Darestani; Chilcott, Terry C.

doi:10.1016/j.desal.2011.04.071

Cited by 73 publications

(49 citation statements)

References 33 publications

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“…[1][2][3][4][5] This polymer has at least four known crystalline phases (α, β, γ and δ), being the β phase the one with the largest piezoelectric response. [3,6] PVDF has been used in various fields including tissue engineering, filtration, air cleaning, rechargeable batteries and sensors, among others. [5,[7][8] In particular, electrospun PVDF fiber mats have attracted a large interest due to their high surface area, small fiber diameters and porous structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability

Correia

Ribeiro

Sencadas

et al. 2015

Progress in Organic Coatings

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Lanceros-Méndez, S. (2015). Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability. Progress in Organic Coatings, 85 151-158.Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability AbstractElectrospun poly(vinylidene fluoride) (PVDF) fiber mats found applications in an increasing number of areas, such as battery separators, filtration and detection membranes, due to their excellent properties. However, there are limitations due to the hydrophobic nature and low surface energy of PVDF. In this work, oxygen plasma treatment has been applied in order to modify the surface wettability of PVDF fiber mats and superhydrophilic PVDF electrospun membranes have been obtained. Further, plasma treatment does not significantly influences fiber average size (~400 ± 200 nm), morphology, electroactive B-phase content (~80-85%) or the degree of crystallinity (Xc of 42 ± 2%), allowing to maintain the excellent physic-chemical characteristics of PVDF. Plasma treatment mainly induces surface chemistry modifications, such as the introduction of oxygen and release of fluorine atoms that significantly changes polymer membrane wettability by a reduction of the contact angle of the polymer fibers and an overall decrease of the surface tension of the membranes.

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Section: Introductionmentioning

confidence: 99%

Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability

Correia

Ribeiro

Sencadas

et al. 2015

Progress in Organic Coatings

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“…Corona might be an option to avoid electric breakdown, but Coster's group [151] used the following electrical "poling" equipment to transform parts of the polymorph of PVDF membranes to the β phase (Fig. 17) from the α phase.…”

Section: Electric Polingmentioning

confidence: 99%

“…Membrane fouling is one of the major problems decreasing membrane permeability during The piezoelectric PVDF membranes mentioned above were tested to control fouling using vibration caused by an AC signal [3,5,151]. When filtrating poly(ethylene glycol) (PEG)…”

Section: For Controlling Membrane Fouling and Cleaningmentioning

confidence: 99%

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Crystalline polymorphism in poly(vinylidenefluoride) membranes

Cui

Hassankiadeh

Zhuang

et al. 2015

Progress in Polymer Science

355

250

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“…PVDF is a semi-crystalline polymer that can crystallize in at least four crystalline polymorphs, namely α, β, δ and γ, being the -phase the one with the highest piezoelectric response [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Strategies for the development of three dimensional scaffolds from piezoelectric poly(vinylidene fluoride)

et al. 2016

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Cell supports based on electroactive materials, that generate electrical signal variations as a response to mechanical deformations and vice-versa, are gaining increasing attention for tissue engineering applications. In particular, poly(vinylidene fluoride), PVDF, has been proven to be suitable for these applications in the form of films and two-dimensional membranes. In this work, several strategies have been implemented in order to develop PVDF three-dimensional scaffolds. Three processing methods, including solvent casting with particulate leaching and three-dimensional nylon, and freeze extraction with poly(vinyl alcohol) templates are presented in order to obtain three-dimensional scaffolds with different architectures and interconnected porosity. Further, it is shown that the scaffolds are in the electroactive β-phase and show a crystallinity degree of ~ 45%. Finally, quasi-static mechanical measurements showed that an increase of the porous size within the scaffold leads to a tensile strengths and the Young's modulus decrease, allowing tuning scaffold properties for specific tissues.

show abstract

Production and characterization of piezo-electric membranes

Cited by 73 publications

References 33 publications

Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability

Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Strategies for the development of three dimensional scaffolds from piezoelectric poly(vinylidene fluoride)

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