Surface Modification of Polycarbonate by Atmospheric-Pressure Plasma Jets

Mello, C.B.; Kostov, K. G.; Machida, Munemasa; Hein, Luis Rogério de Oliveira; Campos, Kamila Amato de

doi:10.1109/tps.2012.2210055

Cited by 13 publications

(10 citation statements)

References 26 publications

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“…The typical waveforms of the applied voltage and the corresponding discharge current have the usual form for an APPJ device and were presented in our previous work [35]. Since the discharge power is consumed in several short current pulses it is not a trivial task to calculate the power dissipated in the discharge.…”

Section: Resultsmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

202

131

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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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Section: Resultsmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

202

131

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show abstract

“…The outer part of plasma reactor is made of polyvinyl chloride (PVC) or glass tube of different dimensions, as listed on Table 1. The glass tube has been used to allow optical access for the spectroscopic measurements of plasma produced inside reactor, since it can have distinct spectral emission from outside plasma jet [10]. The HV metal rod is connected directly to the secondary output of the ferrite transformer; however, there is no direct electrical contact between HV metal rod and plasma jet due to the dielectric end closed glass tube barrier.…”

Section: Methodsmentioning

confidence: 99%

“…This will create weakly ionized plasma, near the isolated conductor and with certain gas flow, and will produce a plasma jet driven by surface wave [3][4][5]. To produce fast variation high electric field, different sources as radio frequency oscillators [6], microwaves [7], high frequency square waves [8], DC discharges [9], or high frequency pulsed discharges [10], all with HV, can be used.…”

Section: Introductionmentioning

confidence: 99%

Ferrite Loaded DBD Plasma Device

Machida

2014

Braz J Phys

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An atmospheric pressure plasma jet device with dielectric barrier discharge was built using low cost 5C22 thyratron valve and ferrite transformer. The ferrite transformer increases the intensity about four times the primary pulse and lengthens the high voltage pulse, keeping the rise time of the thyratron pulse. Spectrometer measurement shows excited nitrogen molecular emissions of second positive system. The most intense nitrogen molecular line, 357.69 nm, was chosen to monitor the time dependence of the discharge. Synthetic temperature, using 380.49 nm line of N 2 emission and SpecAir simulation, shows plasma gas temperature of 300 K. To corroborate this low temperature, the plasma jet is applied to human tongue with no harm or bad physical feeling.

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“…Extreme durability of wettability changes on polyolefin surfaces by atmospheric pressure plasma torch 2010 [20] Treatment of PET and PU polymers by atmospheric pressure plasma generated in dielectric barrier discharge in air 2010 [21] Surface modification of polycarbonate by atmospheric-pressure plasma jets 2012 [22] Atmospheric plasma torch treatment of polyethylene/boron composites: effect on thermal stability 2014 [23] Effect of atmospheric pressure plasma treatment on wettability and dryability of synthetic textile fibres 2013 [24] Atmospheric pressure plasma treatment of amorphous polyethylene terephthalate for enhanced heatsealing properties 2012 [25] Effect of surface wettability and topography on the adhesion of osteosarcoma cells on plasma modified polystyrene 2011 [26] to prevent arcing, grounded surfaces cannot be near these field emission points, as a result the discharge is, by nature, non-uniform: plasma density drops off rapidly with increasing distance from the electrode [33]. In a similar mechanism to flame treatments, a corona treatment causes surface oxidation of polymers.…”

Section: Low Pressure Plasmamentioning

confidence: 99%

Plasma Processing for Tailoring the Surface Properties of Polymers

Abourayana¹,

Dowling²

2015

Surface Energy

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This chapter details how plasma treatments can be used to tailor the wettability of polymers. A plasma is an excited gas, and exposure of a polymer to a plasma discharge generally results in an enhancement in surface energy and associated with this is an increase in wettability. The effect however can be short lived due to hydrophobic recovery. In this review the use of both low and atmospheric plasmas for the activation of polymers will be discussed, as will the use of these plasmas for the deposition of plasma polymerised coatings. The latter can be used to produce polymer surfaces with tailored functionalities, thus achieving stable water contact angles ranging from superhydrophilic to superhydrophobic, as required.This review briefly introduces plasmas and plasma processing and includes an overview of typical plasma treatment sources. This is followed by a review of the use of plasma discharges to treat polymers and in particular to enhance their surface energy, which is important for example in achieving enhanced adhesive bond strength. The final section of this chapter focuses on the deposition of plasma polymerised coatings and how these can be used to tailor both surface chemistry and morphology. Thus the wettability of polymer surfaces can be controlled.

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Surface Modification of Polycarbonate by Atmospheric-Pressure Plasma Jets

Cited by 13 publications

References 26 publications

Surface modification of polymeric materials by cold atmospheric plasma jet

Surface modification of polymeric materials by cold atmospheric plasma jet

Ferrite Loaded DBD Plasma Device

Plasma Processing for Tailoring the Surface Properties of Polymers

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