Publications

This work aimed at the antimicrobial functionalization of 3D-printed polymer-infiltrated biomimetic ceramic networks (PICN). The anti-microbial properties of the polymer-ceramic composites were achieved by coating them with human-and environmentally safe silver nanoparticles trapped in a phenolated lignin matrix (Ag@PL NPs). Lignin was enzymatically phenolated and used as a biobased reducing agent to obtain stable Ag@PL NPs, which were then formulated in a silane (gamma-MPS) solution and deposited to the PICN surface. The presence of the NPs and their proper attachment to the surface were analyzed with spectroscopic methods (FTIR and Raman) and X-ray photoelectron spectroscopy (XPS). Homogeneous distribution of 13.4 +/- 3.2 nm NPs was observed in the transmission electron microscopy (TEM) images. The functionalized samples were tested against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria, validating their antimicrobial efficiency in 24 h. The bacterial reduction of S. aureus was 90% in comparison with the pristine surface of PICN. To confirm that the Ag-functionalized PICN scaffold is a safe material to be used in the biomedical field, its biocompatibility was demonstrated with human fibroblast (BJ-5ta) and keratinocyte (HaCaT) cells, which was higher than 80% in both cell lines.

JTD Keywords: accuracy, antibacterial activity, disease, facile, laccase enzyme, lignin, polyacrylates, polymer-infiltrated ceramic network, silver nanoparticles, zirconia, Mechanical-properties, Mechanical-properties,zirconia,lignin,accuracy,disease,facil, Polymer-infiltrated ceramic network, Polymer-infiltrated ceramic network,polyacrylates,lignin,laccase enzyme,silver nanoparticles,antibacterial activit, Silver nanoparticles