Biobased particleboards based on rice husk and soy proteins: Effect of the impregnation with tung oil on the physical and mechanical behavior

[Display omitted] •Biobased particleboards based on rice husk and soybean adhesive were elaborated.•Impregnation of particleboards with tung oil improved the moisture resistance.•Impregnated particleboards presented good mechanical performance.•Particleboards were stable under high environmental humidity at least three months. The effect of the impregnation with tung oil on the physical and mechanical properties of high density particleboards based on rice husk and soy protein concentrate adhesive was evaluated. Impregnation increased the modulus of rupture and internal bond and decreased the moisture content of particleboards, also reducing water absorption and thickness swelling, reaching the requirements established by ANSI Standard A208.1 for high-density particleboards for use in outdoor environment with occasional wetting. Besides, bending properties remained stable up to three months at 80% RH. Tung oil was viable to improve the physical and mechanical properties of the obtained particleboards.