Surface Modification of Polyimide Film by Dielectric Barrier Discharge at Atmospheric Pressure

A microwave atmospheric pressure plasma jet (MW-APPJ) generator based on a substrate-integrated waveguide (SIW) resonator is proposed. A thin, straight plasma needle with a length of 9 cm could be obtained. Higher than 90% of microwave feeding efficiency is obtained under a wide range of gas flow rates without a microwave matching network. As the gas flow increased from 1 to 14 L/min, a transition from

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“…Thus, water drops can spread rapidly on the surface, which makes an important contribution to the super hydrophilicity. [ 43,44 ]…”

Section: Resultsmentioning

confidence: 99%

Microwave atmospheric pressure plasma jet generated from substrate integrated waveguide resonator

Zhao

Agrawal

et al. 2023

Plasma Processes & Polymers

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“…Concerning the plasma treatment of polyimide films, the main attention has been devoted to the possibility to promote the adhesion between the plasma-treated polyimide surface and subsequently deposited metallic coating (e.g., copper [29][30][31][32][33][34]). Based on the reported results, it has been found that plasma treatment is indeed capable of inducing a substantial increase of surface energy of Kapton that in turn enhances the adhesive strengths of metallic films onto polyimide substrates.…”

Section: Introductionmentioning

confidence: 99%

“…However, the majority of early works employed low-pressure plasma treatment that is in many cases not compatible with the demand of a cheap and fast process [29][30][31]. Because of this, further studies were performed with atmospheric pressure plasmas generated in different gases and gas mixtures such as He/O 2 /NF 3 [32], Ar [33], N 2 /air [34]. It has been reported that the activation and hydrophilization of polyimide films may be achieved also in these cases in a relatively short period of time that ranged, depending on the operational condition, from several seconds up to several minutes.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge

et al. 2020

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In this study, we report on the investigation of influence of air atmospheric pressure dielectric barrier discharge on polyimide (Kapton) films. It is shown that plasma treatment causes a significant increase of Kapton wettability that is connected with alterations of its chemical composition (oxidation) induced by dielectric barrier discharge. Observed variations in the wettability of Kapton were also found to be accompanied by changes in the dynamics of water droplets drying on plasma-treated Kapton, namely by the reduction of the constant contact angle phase of the droplet drying. This effect may be ascribed to the higher surface heterogeneity of plasma-treated Kapton that causes pinning of the edges of drying droplet on the Kapton surface. Finally, the differences in wettability induced by the plasma treatment led to a different way, how the water condensates on the Kapton surface: while the condensing water forms large amount of small droplets on untreated Kapton, much bigger water structures were found on the Kapton exposed to atmospheric plasma.

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“…Studies of the surface modification of PI films using excimer lasers, plasma treatment, and excimer UV lamp radiation have attracted the attention of researchers as a means to improve metal/polymer adhesion. 17 –23 Each method has its own advantages, and using the excimer UV lamp has the benefit of being economical, convenient to use, and environment friendly.…”

Section: Introductionmentioning

confidence: 99%

Effect of 172-nm UV irradiation on polyimide and its application in surface modification by grafting

Das

Poutsma

Kelley

2020

High Performance Polymers

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Polyimides (PIs) have a wide range of industrial and scientific applications due to their excellent thermal and mechanical stability and chemical resistance. Their response to ultraviolet (UV) irradiation is of further interest in high-value applications such as spacecraft technology and electronics packaging. In this work, we investigated the effect of 172-nm UV xenon excimer lamp irradiation on samples of pyromellitimido-oxydianiline (PMDA-ODA) commercial films in the absence of oxygen. The average irradiance received at the sample position was 90 mW/cm2, and the total radiation dosage varied from 0 to 64 J/cm2. X-Ray photoelectron spectroscopy, time-of-flight-secondary ion mass spectrometry, atomic force microscopy, and contact angle measurements were used to characterize the effect. Calculated UV-visible spectroscopy absorption spectra were obtained using the ZINDO//B3LYP/3-21G method to give an indication of which orbitals are involved in the transitions near 172 nm. The reactivity of the different UV-treated PI samples toward nitrogen-borne heptafluorodecene vapor was then investigated using the above techniques. Grafting reactions occurred on the surface of the photochemically activated polymer. This study explored the potential for modification of PI surfaces using UV-light-assisted grafting to impart valuable functionalities.

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Surface Modification of Polyimide Film by Dielectric Barrier Discharge at Atmospheric Pressure

Cited by 11 publications

References 38 publications

Microwave atmospheric pressure plasma jet generated from substrate integrated waveguide resonator

Microwave atmospheric pressure plasma jet generated from substrate integrated waveguide resonator

Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge

Effect of 172-nm UV irradiation on polyimide and its application in surface modification by grafting

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