Surface Analysis of Polymers Treated by Remote Atmospheric Pressure Plasma

Gonzalez, Eleazar; Hicks, Robert F.

doi:10.1021/la9032018

Cited by 72 publications

(65 citation statements)

References 39 publications

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“…This shows that the nitrogen containing functional groups formed on the surface after plasma treatment are not stable and are removed with DI water. Similar observations for PMMA have been reported previously [39] where PMMA samples were treated in the afterglow atmospheric helium plasma in the presence of oxygen and the formed functional groups were washed away with DI water. Another study [27] reports a similar behavior with polyethylene after Ar ?…”

Section: Optical Absorbance Measurementssupporting

confidence: 86%

PMMA Surface Functionalization Using Atmospheric Pressure Plasma for Development of Plasmonically Active Polymer Optical Fiber Probes

Vasanthakumari

Sai

Klages

2016

Plasma Chem Plasma Process

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In this paper, we demonstrate the development of plasmonically active PMMA optical fiber probes by the attachment of gold nanoparticles to the probe surface functionalized by means of flowing post-discharges from dielectric barrier discharge (DBD) plasmas for the first time. Polymer optical fiber (POF) probes (U shape to improve absorbance sensitivity) were subjected to reactive gas atmospheres in the post-discharge region of a coaxial DBD plasma reactor run at atmospheric pressure in different gases (Ar, Ar ? 10 % O 2 , O 2 , N 2 , N 2 ? 0.5 % H 2 ). Plasma treatments in Ar or N 2 gave rise to waterstable electrophilic functional groups on PMMA surface, whereas the amine groups generated by N 2 -containing plasmas were not stable. Subsequently, PMMA surfaces were treated with hexamethylene diamine (HMDA) to obtain stable amine groups through the reaction of electrophilic groups. Gold nanoflowers (AuNF, 37 nm, peak 570 nm) binding to the amine functionalized fiber probes was monitored in real-time by recording the optical absorbance changes at 570 nm with the help of a UV-vis spectrometer. Absorbance response from Ar or N 2 plasma treated probes are 100 and 60 times, respectively, that of untreated control probes. A 25 fold improvement in absorbance response was obtained for Ar plasma treated POF in comparison with only HMDA treated POF. The shelf life of the hence fabricated plasmonically active probes was found to be at least 3 months. In addition, plasmonic activity of U-bent fiber probes treated in Ar plasma is better than the conventional wet-chemical activation by environmentally hazardous acid pre-treatment approaches.Electronic supplementary material The online version of this article (

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Section: Optical Absorbance Measurementssupporting

confidence: 86%

PMMA Surface Functionalization Using Atmospheric Pressure Plasma for Development of Plasmonically Active Polymer Optical Fiber Probes

Vasanthakumari

Sai

Klages

2016

Plasma Chem Plasma Process

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“…The broad band between 3100 and 3600 cm is associated to C O stretch of ketone. In addition, the spectrum of PE exhibits a band around 1150 cm − 1 that can be attributed to O C stretch in C OH groups [37].…”

Section: Surface Chemical Compositionmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

210

144

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In this work we report the surface modification of different engineering polymers, such as, polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP) by an atmospheric pressure plasma jet (APPJ). It was operated with Ar gas using 10 kV, 37 kHz, sine wave as an excitation source. The aim of this study is to determine the optimal treatment conditions and also to compare the polymer surface modification induced by plasma jet with the one obtained by another atmospheric pressure plasma sourcethe dielectric barrier discharge (DBD). The samples were exposed to the plasma jet effluent using a scanning procedure, which allowed achieving a uniform surface modification. The wettability assessments of all polymers reveal that the treatment leads to reduction of more than 40• in the water contact angle (WCA). Changes in surface composition and chemical bonding were analyzed by x-ray photoelectron spectroscopy (XPS) and Fourier-Transformed Infrared spectroscopy (FTIR) that both detected incorporation of oxygen-related functional groups. Surface morphology of polymer samples was investigated by Atomic Force Microscopy (AFM) and an increase of polymer roughness after the APPJ treatment was found.The plasma-treated polymers exhibited hydrophobic recovery expressed in reduction of the O-content of the surface upon rinsing with water. This process was caused by the dissolution of low molecular weight oxidized materials (LMWOMs) formed on the surface as a result of the plasma exposure.

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“…Adhesion correlates with the fraction of the polymer surface sites that are oxidized and converted into active functional groups, as determined by X-ray photoelectron spectroscopy and infrared spectroscopy (Gonzalez and Hicks 2010;Williams et al 2013).…”

Section: Xpsmentioning

confidence: 99%

Effect of Barrier Plasma Pre-Treatment on Polyester Films and their Adhesive Properties on Oak Wood

Novák¹,

Sedliacik²,

Gajtanska³

et al. 2016

BioResources

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A barrier plasma, created at atmospheric pressure, was used to improve the surface and adhesive properties of polyester (PES) film with respect to wood using polyurethane adhesives. The modification of PES film surfaces using barrier discharge plasma is attractive for various applications. Plasma pre-treatment initiates and participates in grafting, polymerization, or cross-linking reactions on the PES surface. This method of surface modification is clean, dry, ecological, and very efficient. The enhancement of the wettability of the polyester film was necessary for promoting higher adhesion to wood with water-based adhesives. The treatment of polyester films by barrier plasma led to a considerable increase in the surface free energy of the film and subsequently an increase in the peel strength of the adhesive joint of PES film-oak wood with polyurethane adhesive.

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Surface Analysis of Polymers Treated by Remote Atmospheric Pressure Plasma

Cited by 72 publications

References 39 publications

PMMA Surface Functionalization Using Atmospheric Pressure Plasma for Development of Plasmonically Active Polymer Optical Fiber Probes

PMMA Surface Functionalization Using Atmospheric Pressure Plasma for Development of Plasmonically Active Polymer Optical Fiber Probes

Surface modification of polymeric materials by cold atmospheric plasma jet

Effect of Barrier Plasma Pre-Treatment on Polyester Films and their Adhesive Properties on Oak Wood

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