THE INFLUENCE OF NANOSIZED SILVER ON THE PROPERTIES OF THE GLUE
In order to obtain high-quality, competitive products, it is worthwhile to pay special attention to eliminating the toxicity of wood materials, reducing the amount of glue, developing technological processes that ensure the minimum duration of the gluing process at the required degree of binder curing. In order to meet this requirement, it is necessary to use low-toxic adhesives which are developed by filling and modifying synthetic resins. Interest in the modification of traditional adhesives is primarily due to the fact that they successfully replace expensive and environmentally unfriendly new resins and adhesives. It is quite promising to use of adhesive compositions containing reactive fillers and modifiers, which improve the technological characteristics of the binder and the performance properties of products, reduce the content of free formaldehyde in finished products and increase production efficiency. The use of colloidal solutions of nanosized particles of various metals significantly improves certain operational and technological properties of materials. The academic staff of the Ural State Forest Engineering University got interested in the effect of modification of urea-formaldehyde resins with a colloidal solution of nanoscale silver particles AdBion-2 on the properties of the glue. The main advantage of using metal nanoparticles as a modifier is the high social effectiveness, economic feasibility, environmental safety, achieved due to the absence of aggressive properties and component concentration meant to minimize the impact on the ecosystem. The article provides a theoretical and experimental evidence for improving the technological and operational properties of adhesive compositions based on the modification of urea-formaldehyde resins, which ensure the production of low-toxic adhesive compounds. The introduction of the proposed modifiers into the composition of urea-formaldehyde resins and adhesives changes the structuring process of hardening binders, at the same time increasing their strength. The research is based on the principles of a systematic approach using sound methods and techniques of scientific research and the modern means of scientific penetration.