Biological Resistance and Application Properties of Particleboards Containing Nano‐Zinc Oxide

Abstract

Special particleboards (PBs) proposed for kitchens, bathrooms, hospitals, and some other specific products for interiors should have a sufficient resistance against bacteria, molds, and decaying fungi. is work deals about effects of zinc oxide nanoparticles (nano-ZnO) added into melamine-urea-formaldehyde (MUF) glue in the amounts of 0, 2, 6, 12, or 24% wt. on selected biological, moisture, and strength properties of laboratory-produced one-layer PBs. e nano-ZnO-treated PBs had a higher biological resistance: (1) against the Gram-positive bacterium Staphylococcus aureus by up to ca. 70% and the Gram-negative bacterium Escherichia coli by up to 50%, since their bacterial activities at using 1.0 McFarland bacterial inoculum decreased from 0.38-0.40 by up to 0.12-0.19 × 10 8 CFU/ml; (2) against the molds Penicillium brevicompactum and Aspergillus niger by up to ca. 50-63%, since their growth intensities (0-4) on the top surfaces of treated PBs decreased according to a modified EN 15457 from 2.33-2.67 by up to 1.17-1.0; (3) against the brown-rot fungus Coniophora puteana by up to 85.7%, since their weight losses reduced according to a modified ENV 12038 from 17.4% by up to 2.5%. e presence of nano-ZnO in PBs uninfluenced their swelling, water absorption, and bending strength; however, it decreased their internal bond strength by up to 38.8%.

Application of Nanotechnology in Wood-Based Products Industry: A Review

“…Nanoparticles of zinc oxide (ZnO) exhibit good antimicrobial activity. These nanoparticles are added into melamine-urea formaldehyde (MUF) glue before being used for particleboard production [ 115 ]. The findings show that there were increments in bioresistance of the particleboards against the Gram-positive bacterium Staphylococcus aureus , the Gram-negative bacterium Escherichia coli , the molds Aspergillus niger and Penicillium brevicompactum as well as the brown-rot fungus Coniophora puteana .…”

Innovative Wood Surface Treatments Based on Nanotechnology

“…Recently, nano-based compounds (zinc and copper) have been applied wood surfaces in order to investigate resistance against termites and mold [27][28][29][30]. It has been shown that zinc-based compounds appeared to be more effective in terms of termite mortality and decay resistance against fungus, i.e., white-rot ( Figures 3 and 4).…”

Changes in chemical and optical properties of silver fir (Abies alba L.) wood due to thermal treatment

“…Several studies related to wood color changes under high temperatures have been performed. With increased temperature and length of treatment, wood becomes darker [1,14,[24][25][26][27][28][29]. Color changes in thermally-treated wood are linked to the degradation of hemicelluloses and cellulose depolymerization [12], color changes in sap and extractives [30], loss of bending strength [1], and wood species [31].…”