Characterization of CO2 plasma-treated polyethylene surface bearing carboxylic groups

Médard, Nicolas; Soutif, Jeanne Claude; Poncin-Epaillard, Fabienne

doi:10.1016/s0257-8972(02)00407-3

Cited by 68 publications

(53 citation statements)

References 29 publications

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“…However, CO 2 plasma degradation seems to decrease slowly after 40 W. No threshold of the discharge power on degradation yield is observed, in contrast to that observed with CO 2 plasma-treated polyolefins. 14,15 This absence could be explained by the fact that polystyrene is an amorphous material and is more readily degraded than semi-crystalline polymers. This similar behaviour of the two plasmas can be explained by the sensitivity of this type of polymer towards preponderant species: photons in N 2 plasma and oxygen atoms in CO 2 plasma.…”

Section: Degradationmentioning

confidence: 99%

Acid and basic functionalities of nitrogen and carbon dioxide plasma‐treated polystyrene

Wang

Chang

Poncin-Epaillard

2005

Surface & Interface Analysis

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The choice of plasma gas can determine the interaction between material and plasma and therefore the applications of the treated materials. Nitrogen plasma can integrate functional groups such as primary amines and carbon dioxide plasma can incorporate carboxylic groups on the surface of polymers. For specific adhesion such as bio-adhesion, polar groups must be attached to the surface to enhance bio-film formation but the acidic or basic character also controls the adhesion mechanism.Nitrogen and carbon dioxide plasmas are chosen to treat the surface of polystyrene and to show the effects of different functionalizations, i.e. attachment of acid or basic groups and degradation are compared in the present work.Nitrogen-containing plasma induces mainly weak degradation at a rate of ∼0.13 µg cm −2 s −1 . The roughness of the treated surface remains mostly unchanged. Functionalization leads to amino group attachment at a concentration of 1.2 sites nm −2 . We found that carbon dioxide plasma treatment shows more drastic degradation with a rate three times higher than that of nitrogen plasma and can create more functional groups (4.5 sites nm −2 ) at mild plasma treatment. However, the roughness of the surface is altered. In both cases the aromatic groups are degraded through the plasma treatment (again this is more evident with the CO 2 plasma) and the induced functionalization was shown to be quick (the upper monolayer of polystyrene film can be functionalized rapidly).

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Section: Degradationmentioning

confidence: 99%

Acid and basic functionalities of nitrogen and carbon dioxide plasma‐treated polystyrene

Wang

Chang

Poncin-Epaillard

2005

Surface & Interface Analysis

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“…The thionin procedure was used previously for the quantitative determination of carboxylic groups on activated polymers (Geismann and Ulbricht, 2005;Mé dard et al, 2001Mé dard et al, , 2002; it is based on the formation of ion pairs between the cationic dye and carboxylate moieties. A calibration curve was first obtained and subsequently employed for the quantification of the carboxylic groups.…”

Section: Characterization and Functionalization Of Neesmentioning

confidence: 99%

Functionalized ensembles of nanoelectrodes as affinity biosensors for DNA hybridization detection

Silvestrini

Fruk

Ugo

2013

Biosensors and Bioelectronics

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a b s t r a c tA novel electrochemical biosensor for DNA hybridization detection based on nanoelectrode ensembles (NEEs) is presented. NEEs are prepared by electroless deposition of gold into the pores of a templating track-etched polycarbonate (PC) membrane. The wide surface of the templating membrane surrounding the nanoelectrodes is exploited to bind the capture DNA probes via amide coupling with the carboxylic groups present on the PC surface. The probes are then hybridized with the complementary target labelled with glucose oxidase (GO x ). The occurrence of the hybridization event is detected by adding, to the supporting electrolyte, excess glucose as the substrate and the (ferrocenylmethyl) trimethylammonium cation (FA þ ) as suitable redox mediator. In the case of positive hybridization, an electrocatalytic current is detected. In the proposed sensor, the biorecognition event and signal transduction occur in different but neighbouring sites, i.e., the PC surface and the nanoelectrodes, respectively; these sites are separated albeit in close proximity on a nanometer scale. Finally, the possibility to activate the PC surface by treatment with permanganate is demonstrated and the analytical performances of biosensors prepared with KMnO 4 -treated NEEs and native NEEs are compared and critically evaluated. The proposed biosensor displays high selectivity and sensitivity, with the capability to detect few picomoles of target DNA.

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“…Increasing discharge power while holding pressure constant also increased the carboxyl group concentration. The discharge power is an important factor for functionalization as it corresponds to the energy intensity and the penetrative ability of plasma, which in turn directly infl uences the nature, the density and the activity of the active species 23,24 . The concentration of carboxylic acids formed on LDPE fi lms increased with decreasing pressure when power was held constant.…”

Section: Carboxyl Group Formationmentioning

confidence: 99%

Plasma modification of polyolefin surfaces

2008

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In order to functionalize the surface of blown low-density polyethylene (LDPE) and cast polypropylene (CPP) fi lms, and ultimately to maximize the attachment of active molecules onto them, the optimum treatment parameters of capacitivelycoupled radio-frequency (13.56 MHz) oxygen plasma were investigated by using contact angle, toluidine blue dye assay, X-ray Photoelectron Spectroscopy ( confi rmed the presence of carboxylic acids on LDPE and CPP fi lms. By exposing the plasma-treated sample to air rather than water and treating fi lms repeatedly with oxygen plasma, a higher carboxyl group concentration could be obtained. Copyright

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Characterization of CO2 plasma-treated polyethylene surface bearing carboxylic groups

Cited by 68 publications

References 29 publications

Acid and basic functionalities of nitrogen and carbon dioxide plasma‐treated polystyrene

Acid and basic functionalities of nitrogen and carbon dioxide plasma‐treated polystyrene

Functionalized ensembles of nanoelectrodes as affinity biosensors for DNA hybridization detection

Plasma modification of polyolefin surfaces

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