2026-04-28T20:59:52Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/512922025-02-06T10:53:44Zcom_10324_1166com_10324_931com_10324_894col_10324_1338

Silva Castro, Iosody Casado Sanz, María Milagrosa León Alonso-Cortés, Agustín Martín Ramos, Pablo Martín Gil, Jesús Acuña Rello, Luis 2022-01-12T17:05:10Z 2022-01-12T17:05:10Z 2018 Coatings, 2018, vol. 8, n. 12, 415 2079-6412 https://uvadoc.uva.es/handle/10324/51292 10.3390/coatings8120415 415 12 Coatings 8 2079-6412 Chitosan and chitosan oligomers are receiving increasing attention due to their antimicrobial properties. In the present study, they were assayed as a preventive treatment against white-rot decay of Populus wood (very important in economic and environmental terms), caused by Trametes versicolor fungus. Their capacity to incorporate different chemical species into the polymer structure with a view to improving their anti-fungal activity was also assessed by mixing oligo-chitosan with propolis and silver nanoparticles. The minimum inhibitory concentration of medium-molecular weight chitosan (MMWC), chitosan oligomers (CO), propolis (P), nanosilver (nAg), and their binary and ternary composites against T. versicolor was determined in vitro. Although all products exhibited anti-fungal properties, composites showed an enhanced effect as compared to the individual products: 100% mycelial growth inhibition was attained for concentrations of 2.0 and 0.2 mg mL􀀀1 for the CO-P binary mixture, respectively; and 2 g mL􀀀1 for nAg in the ternary mixture. Subsequently, MMWC, CO, CO-P and CO-P-nAg composites were tested on poplar wood blocks as surface protectors. Wood decay caused by the fungus was monitored by microscopy and vibrational spectroscopy, evidencing the limitations of the CO-based coatings in comparison with MMWC, which has a higher viscosity and better adhesion properties. The usage of MMWC holds promise for poplar wood protection, with potential industrial applications. application/pdf eng MDPI info:eu-repo/semantics/openAccess © 2018 MDPI Chitosan composites Compuestos de quitosano Wood Madera White-rot fungus Hongos xilófagos Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.mdpi.com/2079-6412/8/12/415 SI