Study on CO2-based plasmas for surface modification of polytetrafluoroethylene and the wettability effects

Surface modification of polymers is an attractive way to endow them with new interfacial properties while maintaining desirable bulk properties, thus expanding their possible applications. In the present work, CO2/N2 DBD plasma was applied for surface polytetrafluoroethylene (PTFE) membranes by using acrylic acid as precursor. Systematic experiments has been carried out investigate influence gas composition and exposure time composition, morphology, wettability performance PTFE membranes. It shown that successfully grafted on form carboxylic functional groups technique, leading improved hydrophilicity. The increase CO2 content in mixtures results enhanced generation CO, CC species, suggesting converted Moreover, at 0˜60 s, hydrophilicity can be improved, longer would lead degradation formed coating, reduced This also demonstrated quality printed text corresponding CO2-based method further extend substrates like polyethylene (PE), polyvinylidene fluoride (PVDF), plexiglass, high versatility process alter performance. study provides useful insight utilization conversion into value-added via technique.