Surface Treatment of Polymers by Plasma

Atmospheric Pressure Plasma‐Assisted Surface Modification of PLA Films via Acrylic Acid Polymerization

“…These results indicate that the two‐stage plasma processing significantly enhances surface roughness compared to untreated films. The increase in effective surface relative to area contributes to greater hydrophilicity and stronger surface interactions on the acrylic acid‐grafted films [39].…”

Melimine-Modified 3D-Printed Polycaprolactone Scaffolds for the Prevention of Biofilm-Related Biomaterial Infections

“…Gaseous plasma generated during the surface treatment is composed of positively and negatively charged ions, free electrons (e – ), and neutral species. Once the surface is exposed to plasma, free electrons, which are considerably faster than the other species, diffuse quickly toward the material surface, thereby leaving the much slower ions in the plasma and, hence, creating a potential gradient between the plasma and the surface . This potential difference does not affect neutral species, so these move randomly until they eventually reach the material surface.…”

“…Once the surface is exposed to plasma, free electrons, which are considerably faster than the other species, diffuse quickly toward the material surface, thereby leaving the much slower ions in the plasma and, hence, creating a potential gradient between the plasma and the surface. 19 This potential difference does not affect neutral species, so these move randomly until they eventually reach the material surface. Negatively charged ions, however, are affected by the resulting electrical field and are sent back into the gaseous plasma before they are able to reach the surface.…”

Efficacy of argon cold atmospheric pressure plasma jet on hospital surface decontamination and its impact on the surface property

“…In addition to bacterial inactivation, any changes in surface characteristic of the test material on repetitive Ar CAPJ exposure were studied. Possibly, the CAP species (electrons, ions, excited atoms, and RONS) would lead to the formation of active sites over the test surface, influencing surface properties such as wettability, roughness, chemical composition, etc [47,49,51,60]. To form active sites, CAP species interact chemically and physically with test surfaces.…”

“…In the CAPJ discharge, cocktail of species such as electrons, ions, excited atoms and molecules, reactive oxygen and nitrogen species (RONS), etc along with UV and electric field, play a synergetic role in bacterial inactivation mechanism [17,24,30] as well as in alteration of surface characteristics [60]. The species in the discharge were determined through a combination of qualitative (OES) and quantitative (MBMS) techniques in this study.…”