Comparison of the surface modifications of polymers induced by direct fluorination and rf-plasma using fluorinated gases

Kharitonov, A. P.; Симбирцева, Г. В.; Tressaud, A.; Durand, Etienne; Labrugère, Christine; Dubois, Marc

doi:10.1016/j.jfluchem.2014.05.002

Cited by 35 publications

(21 citation statements)

References 20 publications

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“…The fluorinated (treated with fluorine mixture) polymer was not fluorinated through all its thickness. It consists of the layers of mainly fluorinated and virgin (untreated) layers which are separated by a very thin transient layer (less than 0.1 μm in thickness) where main chemical transformations take place …”

Section: Resultsmentioning

confidence: 99%

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Plasma and fluorination combination for stable multifunctionality of LDPE packaging films

Peyroux

Dubois

Tomasella

et al. 2016

Plasma Processes & Polymers

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International audienceLow Density Polyethylene (LDPE) films are treated by a combination of plasma treatment followed by direct fluorination. Plasma treatment is carried out either with ion bombardment or reactive conditions according to the gas(es) used. The properties of samples prepared by the two combinations (i) ion bombardment/fluorination; and (ii) reactive plasma/fluorination are compared to the films treated only with single fluorination or plasma. Combined treatment results in printability and barrier properties toward O2 enhancement and the maintenance of the barrier properties toward water. Contrary to the direct fluorination only, the two combinations allow stable surface properties to be achieved

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Section: Resultsmentioning

confidence: 99%

“…Those groups are formed during fluorination because oxygen is a technology admixture in the fluorine or in post‐reactions with atmosphere oxygen. Further those groups are hydrolyzed by atmospheric moisture: FCO + H 2 O −> (CO)OH + HF . Time dependence of each component is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Plasma and fluorination combination for stable multifunctionality of LDPE packaging films

Peyroux

Dubois

Tomasella

et al. 2016

Plasma Processes & Polymers

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“…O mecanismo de fluoração direta por imersão é um método eficaz para melhorar as propriedades superficiais de materiais poliméricos imaculados, incluindo propriedades de barreira, aderência, capacidade de impressão, propriedades de separação de gases, resistência química, propriedades antibacterianas (biocompatibilidade) etc. 5 . Uma finalidade dos polímeros fluorados é aumentar suas superfícies hidrofóbicas, levando à melhoria das propriedades antiaderente, de baixo atrito, anticorrisiva de baixa inflamabilidade, de baixo índice de refração, de baixa constante dielétrica e repelência de água-óleo.…”

Section: Introductionunclassified

Análise comparativa entre o grau de molhabilidade dos polímeros reciclados PVC e PET tratados por imersão ou deposição de filmes orgânicos em plasmas fluorados

SantAna¹,

Prestes²,

Mancini³

et al. 2019

RBAV

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The goal of this work was to study the wettability of the recycled polyvinylchloride (PVC) and polyethylene terephthalate (PET) surface, in which was used the technique of Plasma immersion (PI), by means of ionic bombardment using the gas Sulfur Hexafluoride (SF6) with total pressures down to 100 torr. The substrates were confined in a low vacuum reactor, and gas was excited by a radiofrequency discharge source, RF: (13.56 MHz) applied to the lower electrode (sample holder), coupled to a match in box. The surface wettability result of these polymers via "contact angle, ϴ", were compared with parallel studies in the literature. In this case, the technique of Infrared Absorption Spectroscopy (FTIR) was applied in order to analyze the possible physico-chemical changes in the surface of the polymers in the presence of an organic film of Isopropanol, SF 6 , whose values of ϴ were lower than the untreated material, even in the fluorinated atmosphere.Therefore, the parameters pressure, time or discharge power of RF were varied, In all cases, moderate to high fluorine is considered, with contact angles close to 120º are inferior to a similar treatment in literature, in which it was applied, a cooling prototype of the sampled electrode throughout the process; condition that resulted in PVC, ϴ ~ 156º (surface with higher degree of fluorine); and PET in turn reached ϴ ~ 140 °.

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“…Plasma-enhanced fluorination treatment has been proven to be an effective tool to enhance the dielectric properties [63,138,213]. As seen from previous result, this treatment improves the surface current value and may enhance the surface potential decay rate, which It is a well-known fact that plasma treatment, in general, is widely used to increase the printability of a surface by increasing the wettability factor.…”

Section: Moisture Effect On Surface Current Measurementmentioning

confidence: 89%

“…-CHF groups and oxygen-containing groups) and, thus, influences the surface polarity of the treated epoxy sample. On top of that, due to the surrounding moisture and the high surface energy of the treated epoxy resin, the water absorption effect also plays a major role in influencing the conducting surface current [138]. Theoretically, in a controlled environment, where the moisture level on the sample's surface is kept constant all the time, a transient behaviour is expected in the first few minutes with the current falling due to bulk and surface polarisation followed by a steady state current once the field distribution across the sample has become constant.…”

Section: Preliminary Surface Current Measurementmentioning

confidence: 99%

Surface fluorinated epoxy resin for high voltage DC application

Mohamad

Chen

Zhang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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Charge build up under high voltage DC is a significant concern in the transmission system as its presence may distort the local electric field. By chemically treat polymeric insulation via directfluorination, and plasma enhanced fluorination process, the charge transport characteristics of the material can be modified. In doing so, excellent surface properties similar to those of fluoropolymers can be attained without compromising the bulk properties of the original polymeric insulation. The change in chemical components at the surface of polymeric insulation should lead to a corresponding change in dielectric properties at the surface and consequently may suppress the occurrences of charge build up. In this research, epoxy resin samples with various surface fluorinating conditions were formulated and treated. The samples then were characterised by SEM and EDX analysis, Raman spectroscopy, and DC surface conductivity measurements. To further explain the effects of fluorination treatment, modelling of the electric field and current density distribution had been carried out. Surface potential decay tests from corona discharge, as well as PEA measurements, show that there is a significant change in decay characteristics with the introduction of surface fluorinated layer. The decay mechanisms responsible for the observed

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Comparison of the surface modifications of polymers induced by direct fluorination and rf-plasma using fluorinated gases

Cited by 35 publications

References 20 publications

Plasma and fluorination combination for stable multifunctionality of LDPE packaging films

Plasma and fluorination combination for stable multifunctionality of LDPE packaging films

Análise comparativa entre o grau de molhabilidade dos polímeros reciclados PVC e PET tratados por imersão ou deposição de filmes orgânicos em plasmas fluorados

Surface fluorinated epoxy resin for high voltage DC application

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