Selective grafting of amine groups on polyethylene by means of NH3−H2 RF glow discharges

Favia, Pietro; Stendardo, Marco Vito; d’Agostino, Riccardo

doi:10.1007/bf02532821

Cited by 187 publications

(186 citation statements)

References 17 publications

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“…NH3, among others, revealed to be very effective in grafting nitrogen-containing polar groups, with negligible etching and reduced surface damage [27][28][29]. In particular, NH3-treatments were found much more effective (better adhesion, much shorter treatment time) than 02-ones in activating PET toward the adhesion of thin Al layers [29].…”

Section: Plasma Treatments Of Polymers With Limited Hydrophobic Recoverymentioning

confidence: 96%

Functionalization of Biomedical Polymers by Means of Plasma Processes: Plasma Treated Polymers with Limited Hydrophobic Recovery and PE-CVD of -COOH Functional Coatings.

Sardella¹,

Gristina²,

Milella³

et al. 2002

J. Photopol. Sci. Technol.

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Section: Plasma Treatments Of Polymers With Limited Hydrophobic Recoverymentioning

confidence: 96%

Functionalization of Biomedical Polymers by Means of Plasma Processes: Plasma Treated Polymers with Limited Hydrophobic Recovery and PE-CVD of -COOH Functional Coatings.

Sardella¹,

Gristina²,

Milella³

et al. 2002

J. Photopol. Sci. Technol.

Self Cite

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“…Electric characteristics of the discharge were observed by a V/I probe (ENI Model 1065) and electron densities were measured using microwave interferometry (JE PlasmaConsult MWI 2650) showing a linear behavior with power input [21]. Chemical composition was examined by XPS surface analysis (PHI 5600 LS), also using derivatization with 4-(trifluoromethyl)benzaldehyde (TFBA) vapor to determine the amino group density with respect to the carbon concentration (NH 2 /C) [22]. Samples were stored in controlled environment (21°C, 65% relative humidity (RH)) for 20 days and in deionized water for 2 h.…”

Section: Plasma Processingmentioning

confidence: 99%

Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Hegemann¹,

Hanselmann²,

Guimond³

et al. 2014

Surface and Coatings Technology

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Materials for biomedical applications typically involve surface engineering. Scaffolds used for tissue engineering, for example, require a surface functionalization in order to support cell growth. The deposition of functional plasma polymer coatings seems to be an attractive approach to modify substrates for biomedical applications. Possible degradation of highly functional plasma polymers and the effect of its degradation products on cell growth, however, are not yet investigated in detail. Plasma polymer formation is governed by gas phase (mainly determining the chemical composition) and surface processes (inducing cross-linking) which both influence the incorporation of amino groups in a-C:H:N coatings deposited by NH 3 /C 2 H 4 discharges. Aging is studied in air and in aqueous conditions revealing the degradation of such plasma polymers (loss in thickness and loss of amino groups). Degradation products seem to influence viability and proliferation of mouse skeletal muscle cells on electrospun poly(ε-caprolactone) scaffolds. Thus, possible chemical changes as a function of time or exposure to different media must be taken into account in the design of functional plasma polymer coatings for biomedical applications in order to avoid possible adverse effects on cell growth.

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“…However, among these nitrogenated functions, primary amines have attracted our attention because they can be used as initiation sites for promoting lactone ring-opening polymerization yielding polyester-grafted MWCNT nanohybrids [47]. The quantity of primary amine functions was determined after chemical derivatization with 4-(trifluoromethyl)benzaldehyde (TFBA) [38,48,49]. This technique was developed to selectively label surface functional groups of interest with molecules containing an element that is not present on the surface prior to the derivatization reaction.…”

Section: Quantification Of Primary Amine Functions Grafted On Cntsmentioning

confidence: 99%

Selective Grafting of Primary Amines onto Carbon Nanotubes via Free-Radical Treatment in Microwave Plasma Post-Discharge

et al. 2012

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Abstract:A novel strategy to graft functional groups at the surface of carbon nanotubes (CNTs) is discussed. Aiming at grafting nitrogen containing groups, and more specifically primary amine covalent functionalization, CNTs were exposed under atomic nitrogen flow arising from an Ar + N 2 microwave plasma. The primary amine functions were identified and quantified through chemical derivatization with 4-(trifluoromethyl)benzaldehyde and characterized through X-ray photoelectron spectroscopy. The increase of the selectivity in the primary amines grafting onto CNTs, up to 66.7% for treatment of CNT powder, was performed via the reduction of post-treatment oxygen contamination and the addition of hydrogen in the experimental set-up, more particularly in the plasma post-discharge chamber. The analyses of nitrogenated and primary amine functions grafting on the CNT surface suggest that atomic nitrogen (N•) and reduced nitrogen species (NH• and NH 2 •) react preferentially with defect sites of CNTs and, then, only atomic nitrogen continues to react on the CNT surface, creating defects. OPEN ACCESSPolymers 2012, 4 297

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Selective grafting of amine groups on polyethylene by means of NH3−H2 RF glow discharges

Cited by 187 publications

References 17 publications

Functionalization of Biomedical Polymers by Means of Plasma Processes: Plasma Treated Polymers with Limited Hydrophobic Recovery and PE-CVD of -COOH Functional Coatings.

Functionalization of Biomedical Polymers by Means of Plasma Processes: Plasma Treated Polymers with Limited Hydrophobic Recovery and PE-CVD of -COOH Functional Coatings.

Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Selective Grafting of Primary Amines onto Carbon Nanotubes via Free-Radical Treatment in Microwave Plasma Post-Discharge

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