Antimicrobial coatings on wood by use of atmospheric pressure chemical vapour deposition (APCVD)
Pages: 16 - 25
Pavel Vladimirovich Kosmachev,
Gennadi Georgevich Volokitin,
In this work, an atmospheric pressure plasma chemical vapour deposition (APCVD) technology was used to create thin amorphous silicon dioxide films with bactericidal properties on beech wood veneer. Furthermore, the active agents Ag, Cu and Zn were incorporated in the matrices of these films to obtain antimicrobial properties. SiOx-film-matrices were created by use of hexamethyldisiloxane (HMDSO) as a precursor material, the active agents were embedded into the growing film matrix by use of AgNO3, Zn(NO3)2 or Cu(NO3)2 as secondary precursor materials. The structure of the fabricated layers was investigated by SEM, the chemical composition was determined by XPS. The antibacterial effect was evaluated by BacTiter-Glo® and agar diffusion method. The fabricated films showed a strong antibacterial effect against the bacteria strains Escherichia coli (gram-) and Staphylococcus aureus (gram+). However, a significant effect against mould (mould test) could not be achieved. Moreover, resistance of the antimicrobial coating against abrasion and leaching were tested, and the results demonstrated a good wear resistance of the coatings.