Abstract

Abstract A novel technique was developed to mask the positive charge conferred to the support surface, thanks to low‐temperature plasma oxidation, and followed by ferric ions coating. The oxidation strength of various plasma, such as CO2, O2, NH3 and Ar were studied for four kinds of thermoplastic supports (PE, PP, PS, PVC). A general increase in surface hydrophilicity in term of water contact angle was observed after plasma treatment, a best improvement was obtained by plasma Ar. XPS analyses further showed that reduction in water contact angle was mainly due to creation of oxygen and nitrogen functional groups on the treated support surface. Tests of Fe ions coating on the plasma‐oxidized support surface was followed. Experimental results clearly showed a correlation between the surface chemical composition in term of the ratio of (O+N)/C and the quantity of Fe coated to the surface. As compared to natural thermoplastic support, bacterial adhesion test showed that adhesion rate and capacity on the modif...

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