Spectroscopic and antimicrobial studies of polystyrene films under air plasma and He-Ne laser treatment

Abstract

Polystyrene (PS) films are used in packaging and biomedical applications because of their transparency and good environmental properties. The present investigation is centered on the antifungal and antibacterial activities involved in the film surface. Subsequently, microbial formations were immobilized on the modified PS films. Living microorganisms such as bacteria and yeast were used. Untreated PS films show very fast rate of growth of bacteria within few hours. The study involves developments of polymer surfaces with bacterial growth and further studies after giving antibacterial treatment such as plasma treatment. Major emphasis has been given to study the effect of various parameters which can affect the performance of the improved material. Films were prepared by two methods: plasma treatment under vacuum and under ongoing He-Ne laser source. The parameters such as (1) surface area by contact angle measurements, (2) quality of material before and after treatment by SEM and FTIR spectra and (3) material characterization by UV-vis spectra were studied. It was observed that plasma treatment of the PS material for different processing time improved the surface properties of PS films.

Influence of operational parameters on plasma polymerization process at atmospheric pressure

“…The pPS films show a maximum of transmittance band at 230-260 nm domain of wavelength which can be attributed to -‫ء‬ transition of aromatic ring. 29 In agreement with IR spectroscopy ͓Fig. 7͑b͔͒, the UV transmittance spectrum of a plasma polymerized film is proportional to its thickness.…”

Poly (Ethylene Glycol-Co-Styrene) Films Deposited by Plasma Polymerization Reactions at Atmospheric Pressure

“…The polystyrene films show a maximum of absorbance band between 250-280 nm which can be attributed to -* transition in aromatic ring and the same band is present in the UV-Vis spectrum of ppES films [15].…”

AFM and SEM analysis of polystyrene Surface Treated by DC Pseudo Plasma Discharge

“…material [12]. Moreover, it is considered to be anti-pollution technique and enhances the excess of micro roughness and production of radicals to obtain hydrophilic surfaces [13,14].…”