graduate student
Voronezh, Voronezh, Russian Federation
UDK 630 Лесное хозяйство. Лесоводство
The article examines the effect of the complex effect of technological factors on the properties of a composite material in the production of aspen veneer plywood used for the production of LVL blocks used in construction. To obtain composite plywood, it is proposed to use an aspen veneer compacted by rolling and a complex binder including phenol-formaldehyde resin of the SFG-3014 brand and nanocrystalline cellulose treated in an ultrasonic field, in the presence of electromagnetic action on the finished plywood by a pulsed magnetic field. Introduction to binder 2 wt. The use of nanocrystalline cellulose made it possible to obtain plywood with increased physical and mechanical properties: tensile strength during static bending (at 155 %), when chipping along the adhesive seam (at 330 %), impact strength during bending (at 144 %). The hydrophobization of the veneer with cardanol ensured a decrease in moisture absorption of plywood (at 300 %) and swelling in the direction of pressing (at 125 %). The study was carried out according to the Hartley plan with varying factors: the content of nanocrystalline cellulose in the binder (from 2 to 6 wt.%), pressing pressure (from 3 to 9 MPa), exposure time to a pulsed magnetic field (from 1 to 9 min).
nanocrystalline cellulose, plywood, modification, phenol-formaldehyde resin, ultrasound, pulsed magnetic field, aspen, Populus tremula L.
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