Highly dispersed manganese dioxide nanoparticles anchored on diatomite surface by sol–gel method and its performance on soybean meal‐based adhesive

Abstract

Nanoparticle enhancement has been used as an effective means to improve the performance of biomass adhesives. However, there is an inevitable problem of stress concentration caused by particle agglomeration and thus the adhesive layer is susceptible to damage. Therefore, in this paper, a sol-gel method was used to generate uniformly distributed manganese dioxide (MnO 2 ) nanoparticles on the surface of diatomite (Dia) and used for the modification of soybean meal based wood adhesives. The results showed that MnO 2 nanoparticles have been successfully anchored on the surface of Dia during the sol-gel process without agglomeration. MnO 2 /Dia particles could fill in the adhesive gaps and form hydrogen bonds with soy protein molecules, which ensured that the adhesive wet shear strength was increased by 33% to 0.89 MPa. This study provided an idea for the preparation of highly dispersed nanoparticle reinforced adhesives.

Multifunctional wood composites based on Camellia oleifera shell with harsh‐weather and self‐mildew resistance

“…First, if using an indoor‐grade adhesive, such as soybean adhesive, the water resistance and weather resistance of plywood will be poor. [ 8–10 ] Second, even if using water‐resistant phenolic or MUF adhesives, the surface of uncoated wood composite is directly exposed and is susceptible to water, heat, UV, acid rain, fire, and mold when applied outdoors. Nowadays, melamine‐impregnated paper, [ 11–13 ] phenolic resin flame‐resistant paper, [ 14–16 ] and thin panels [ 17–19 ] are mainly used for the surface of coated wood‐based composites.…”