Study of polypropylene surface modification by air dielectric barrier discharge operated at two different frequencies

Kostov, K. G.; Nishime, Thalita Mayumi Castaldelli; Hein, L. R. O.; Tóth, A.

doi:10.1016/j.surfcoat.2012.09.041

Cited by 96 publications

(66 citation statements)

References 24 publications

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“…The nodules on intrinsically hydrophobic polymer surfaces can be explained by the formation of polar LMWOM, which agglomerates into spherically shaped structures. Upon washing the samples in distilled water the large structures disappear, which confirms that, they were, in fact, constituted by Comparing the morphology of the samples treated by APPJ with the one of polymers treated by DBD in our previous work [34] it appears that both processes produce LMWOM. However, it seems that the DBD-treated polymers exhibit much larger nodulelike structures on their surfaces.…”

Section: Surface Morphologysupporting

confidence: 72%

“…As inferred in previous works [21,34] this behavior is caused by the dissolution of low molecular weight oxidized material (LMWOM). It is constituted of short highly oxidized polymer fragments, loosely bounded to the surface, which were produced during the plasma exposure.…”

Section: Surface Chemical Compositionsupporting

confidence: 53%

“…7 his treatment time is more than enough to saturate the polymer wetting properties. For comparison the same polymers (PE and PP) were treated by the DBD system described in [34]. As it was shown there, the DBD processing of polymers is also characterized by a critical treatment time (10-20 s) beyond which there is no further reduction of WCA.…”

Section: Polymer Wettabilitymentioning

confidence: 99%

“…Therefore it would be interesting to compare the surface modification efficiency of the APPJ described above with the efficiency of a typical DBD process. In this work for surface modification of the same polymers (PE and PP) we employed the air DBD system described elsewhere [34]. The chemical and morphological modifications of the polymer surface, induced by the APPJ and DBD processes, are compared and discussed in the following section.…”

Section: Polymer Treatmentsmentioning

confidence: 99%

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Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

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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: Surface Morphologysupporting

confidence: 72%

Section: Surface Chemical Compositionsupporting

confidence: 53%

Section: Polymer Wettabilitymentioning

confidence: 99%

Section: Polymer Treatmentsmentioning

confidence: 99%

See 2 more Smart Citations

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

Self Cite

209

144

View full text Add to dashboard Cite

show abstract

“…The DCSBD was designed to be suitable for flat surfaces treatment in particular. The DCSBD electrode system was powered by AC high voltage source which has a frequency (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) kHz and approximately 20 kV peak-to-peak voltage. In the present study, the discharge power is 320 W and it was operated in the air in order obtain a quasi-homogeneous diffuse plasma surface.…”

Section: Plasma Treatmentmentioning

confidence: 99%