Surface analysis of poly(vinylidene difluoride) membranes

Flösch, Dietmar; Lehmann, Hans-Dieter; Reichl, R.; Inacker, O.; Göpel, Wolfgang

doi:10.1016/0376-7388(92)80079-y

Cited by 23 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, we use an alternative process to surface modification of PVDF. It is well known that PVDF surface presents some chemical defects as C C double bonds and oxygen-containing groups [15][16][17][18]. The presence of the oxidized defects of PVDF surface is confirmed by the XPS and FT-IR spectra of both commercial pristine PVDF films.…”

Section: Uv Irradiation Of Pvdf Surface and Surface-initiated Free Ramentioning

confidence: 84%

Photoactivated surface grafting from PVDF surfaces

Berthelot¹,

Le²,

Jégou³

et al. 2011

Applied Surface Science

View full text Add to dashboard Cite

International audienceEconomic and easy methods to tune surface properties of polymers as Poly(vinylidene fluoride) (PVDF) without altering bulk properties are of major interest for different applications as biotechnological devices, medical implant device. . . UV irradiation appears as one of the simplest, easy and safe method to modify surface properties. In the case of self-initiated grafting, it is generally assumed that the pretreatment of the PVDF surface with UV irradiation can yield alkyl and per-oxy radicals originating from breaking bonds and capable of initiating the subsequent surface grafting polymerizations. Surprisingly, the present work shows that it is possible to obtain polymer grafting using low energetic UV-A irradiation (3.1-3.9 eV) without breaking PVDF bonds. An EPR study has been performed in order to investigate the nature of involved species. The ability of the activated PVDF surface to graft different kinds of hydrophilic monomers using the initiated surface polymerization method has been tested and discussed on the basis of ATR FT-IR, XPS and NMR HRMAS results

show abstract

Section: Uv Irradiation Of Pvdf Surface and Surface-initiated Free Ramentioning

confidence: 84%

Photoactivated surface grafting from PVDF surfaces

Berthelot¹,

Le²,

Jégou³

et al. 2011

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…We propose that the partial scission of membrane polymers increases the PES-30 surface charge [7] and the more charged membrane becomes more hydrophilic. The PVDF is a chlorine resistant polymer, and hydrophilization of PVDF-30 is related to the gradual elimination of the surface preservation residues [30][31][32]. At low Ct values partial elimination results in the increased surface charge and hydrophilicity of the membrane.…”

Section: Membrane Initial Permeability (L/(m 2 H Bar))mentioning

confidence: 99%

Understanding the oxidative cleaning of UF membranes

Levitsky

Duek

Arkhangelsky

et al. 2011

Journal of Membrane Science

View full text Add to dashboard Cite

“…They are well‐known for their physical and chemical resistance 4–6. In addition to numerous and versatile industrial applications, new developments of PVDF have been found in biotechnology7–10 and in the biomedical sectors (vascular sutures, regeneration templates) 11–13. But the biomedical equipments could be polluted easily because of the low surface energy and hydrophobility of PVDF.…”

Section: Introductionmentioning

confidence: 99%

Preparing polymer brushes on poly(vinylidene fluoride) films by free radical polymerization

Sun¹,

Chen²,

Zhou³

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

Grafting of polymer brushes on the poly(vinylidene fluoride) (PVDF) films was carried out by the surface-initiated free radical polymerization. Surface-initiators were immobilized on the PVDF films by surface hydroxylation and esterification of the surface-tethered hydroxyl groups with 4,4Ј-azobis(4-cyanopentanoic acid) (ACP). Homopolymer brushes of methyl methacrylate (MMA) were prepared by free radical polymerization from the azofunctionalized PVDF surface. The chemical composition and topography of the graft-functionalized PVDF surfaces were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance (ATR) FTIR spectroscopy, and atomic force microscopy (AFM). Kinetics study revealed an exponential increase in the graft concentration of polymer brushes with the reaction time, indicating that the chain growth from the surface was consistence with a chain polymerization. Water contact angles on PVDF films were reduced by surface grafting of MMA.

show abstract

Surface analysis of poly(vinylidene difluoride) membranes

Cited by 23 publications

References 10 publications

Photoactivated surface grafting from PVDF surfaces

Photoactivated surface grafting from PVDF surfaces

Understanding the oxidative cleaning of UF membranes

Preparing polymer brushes on poly(vinylidene fluoride) films by free radical polymerization

Contact Info

Product

Resources

About