Polyimide Surface Modification Using He-H2O Atmospheric Pressure Plasma Jet-Discharge Power Effect

Abstract

<jats:p>The atmospheric pressure He- H 2 O plasma jet has been analyzed and its effects on the Kapton polyimide surface have been investigated in terms of discharge power effect. The polyimide surfaces before and after plasma treatment were characterized using atomic force microscopy (AFM), X-ray photoelectrons spectroscopy (XPS) and contact angle. The results showed that, increasing the discharge power induces remarkable changes on the emission intensity, rotational and vibrational temperatures of He- H 2 O plasma jet. At the low discharge power ≤5.2 W, the contact angle analysis of the polyimide surface remarkably decrease owing to the abundant hydrophilic polar C=O and N–C=O groups as well as increase of surface roughness. Yet, plasma treatment at high discharge power ≥5.2 W results in a slight decrease of the surface wettability together with a reduction in the surface roughness and polar groups concentrations.</jats:p>

Metallized polyimide films for biomedical applications: X‐ray photoelectron spectroscopy, surface tension, and blood compatibility studies

“…Apart from that, surface chemistry of the materials could also alter the configuration of the water molecules. [70] Based on these assumptions, value of WCA decreases with the increasing of surface roughness (a parameter discussed in detail in a previous study [41] ). Formed on the XPS measurements and also on values of WCA, the polar functional group introduced could act as a linker between polymer substrate and gold metal.…”

Localized Surface Hydrophilicity Tailoring of Polyimide Film for Flexible Electronics Manufacturing Using an Atmospheric Pressure Ar/H2O Microplasma Jet

“…It is well known that plenty of high-energy particles, such as electrons, Ar + and excited Ar, are generated in the plasma jet, and these particles will bombard and etch the PI film surface, resulting in undulating and rough surface morphologies [27]. A rougher surface of the PI films was beneficial for increasing the surface hydrophilicity [28].…”

“…This inference was verified by the deconvolution of the C 1 s spectra of the untreated PI film and the PI films modified by the Ar/H 2 O microplasma jet, as shown in Figure 10. It can be seen that the C 1 s peak could be resolved into four main components: the peak at 284.2 eV represented the C-C aromatic carbon; the peak at 285.1 eV was assigned to C-N; the peak at 286.1 eV was denoted to C-O-C; and the peak at 288.2 eV belonged to the carboxyl groups, C=O-OH [22,[28][29][30]. The increase in the concentration of C=O-OH on the PI surface after the Ar/H 2 O microplasma treatment was attributed to surface oxidation by oxygen-containing reactive species generated in the microplasma, such as OH.…”

A Molecular Dynamics Simulation Study: The Inkjet Printing of Graphene Inks on Polyimide Substrates

“…However, as PI is a relatively hydrophobic material, usually its surface needs further modification to improve its adhesion with the rGO inks. Plasma treatment has been widely used as one of the most popular among many surface modification methods (Kondo et al, 2017;Rusu et al, 2020;Marques et al, 2019;Abdel-Fattah and Alshaer, 2020;Usami et al, 2012;Park et al, 2010;Chan et al, 1996;Least and Willis 2013;Ghosh et al, 1997;Huang et al, 2003;Shin and Kang, 2010) due to various advantages such as high efficiency, rapid and simple operation, no need for solvents, and the ability to introduce a wide range of functional groups onto the surface (Abdel-Fattah and Alshaer, 2020). Meanwhile, after plasma treatment, only the very surface of the polymer is etched without significantly changing the properties of the inner bulk (Abdel-Fattah 2019; Park et al, 2009;Xie et al, 2011).…”