engleski

Antimicrobial effectiveness of nano-composite thin films deposited on PLA surfaces by simultaneous plasma polymerization/sputtering technique

Novelty of this research is the application of biodegradable Polylactide (PLA) polymer and antimicrobial modifications using environmentally friendly agents (silver and chitosan) and bio based alcohol (glycerol and polyethylene glycol) for the improvement of hydrophilicity. Silver (Ag) is an efficacious and useful antibacterial agent which will be added to PLA polymer with surface modifications. Antimicrobial activity of PLA films was measured against Gram-positive bacteria Staphylococcus aureus (ATCC 6538) and Gram- negative bacteria Escherichia coli (DSMZ 30083). Characterisation of polylactide polymers of obtained films was performed by thickness measurement and contact angle in order to determine their hydrophilicity. The plasma conditions and parameters showed a strong influence on plasma-deposited thin films, which resulted with the improvement of hydrophilicity and antimicrobial properties. The aim of this research was to develop and characterise innovative renewable products of biodegradable characteristics with broad application possibilities.

Polylactide; antimicrobial; hydrophilicity; silver; nano-composite

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