RT info:eu-repo/semantics/article
T1 Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor
A1 Silva Castro, Iosody
A1 Casado Sanz, María Milagrosa
A1 León Alonso-Cortés, Agustín
A1 Martín Ramos, Pablo
A1 Martín Gil, Jesús
A1 Acuña Rello, Luis
K1 Chitosan composites
K1 Compuestos de quitosano
K1 Wood
K1 Madera
K1 White-rot fungus
K1 Hongos xilófagos
AB Chitosan and chitosan oligomers are receiving increasing attention due to theirantimicrobial properties. In the present study, they were assayed as a preventive treatment againstwhite-rot decay of Populus wood (very important in economic and environmental terms), causedby Trametes versicolor fungus. Their capacity to incorporate different chemical species into thepolymer structure with a view to improving their anti-fungal activity was also assessed by mixingoligo-chitosan with propolis and silver nanoparticles. The minimum inhibitory concentration ofmedium-molecular weight chitosan (MMWC), chitosan oligomers (CO), propolis (P), nanosilver(nAg), and their binary and ternary composites against T. versicolor was determined in vitro. Althoughall products exhibited anti-fungal properties, composites showed an enhanced effect as comparedto the individual products: 100% mycelial growth inhibition was attained for concentrations of 2.0and 0.2 mg mL􀀀1 for the CO-P binary mixture, respectively; and 2  g mL􀀀1 for nAg in the ternarymixture. Subsequently, MMWC, CO, CO-P and CO-P-nAg composites were tested on poplar woodblocks as surface protectors. Wood decay caused by the fungus was monitored by microscopy andvibrational spectroscopy, evidencing the limitations of the CO-based coatings in comparison withMMWC, which has a higher viscosity and better adhesion properties. The usage of MMWC holdspromise for poplar wood protection, with potential industrial applications.
PB MDPI
SN 2079-6412
YR 2018
FD 2018
LK https://uvadoc.uva.es/handle/10324/51292
UL https://uvadoc.uva.es/handle/10324/51292
LA eng
NO Coatings, 2018, vol. 8, n. 12, 415
DS UVaDOC
RD 18-nov-2024