Straw particle board employing bark powder modified phenolic resins as adhesives

Abstract

A straw particle board employing bark powder modified phenolic resins as adhesives adopts straws as main raw materials and woodworking fragment wood shavings as secondary materials. The particle board is characterized in that the adhesives of the pressed straw particle board employ the bark powder modified phenolic resins, a large amount of renewable wood processing remained bark powders are adopted to replace parts of petrochemical phenols, the phenols are employed to directly activate the bark powders, the bark powders are applied to preparation of phenolic resin adhesives, and operation is simple. In a gluing process, CH3Si (OH) 3 organic silicon liquor with low cost is adopted to modify the adhesives so as to enable the adhesives to easily moisten, penetrate and diffuse on the surfaces of the straws, thereby being favorable for glue joint of the straws. Simultaneously, interfaces of the straws are modified so as to enable the bark powder adhesives to be applied to production of the straw particle board. The straw particle board produced by adopting the adhesives has the advantages of attaching importance to effective usage of biological materials, having low product manufacturing cost, fine performance, strong operability and bringing remarkable ecological benefits and environmental benefits after being popularized.

Description

technical field

[0001] The invention relates to the preparation of a modified phenolic resin adhesive by using bark powder as a raw material, which is used for pressing straw particle boards, and belongs to the field of wood science and technology in forestry engineering. Background technique

[0002] At present, crop straws, such as rice straw and wheat straw, are used as raw materials to press straw-based panels, and isocyanate adhesives are generally used. However, the price of this type of adhesive is high, and the price of isocyanate is 10-12 times that of urea-formaldehyde resin glue for wood particleboard. At present, the world is vigorously advocating the use of biomass energy and biomass materials and reducing petrochemical products. At the same time, a large amount of wood processing residues, such as bark powder, is effectively used as a biomass raw material, and its chemical properties are used to replace part of phenol for phenolic resin. Synthesis, which can n...