Method of fluidifying peanut shell and producing adhesion agent modifier

Abstract

The invention discloses a preparing method of earthnut shell liquidation and adhesive modifier, which comprises the following steps: removing soil and foreign matter on the surface of earthnut; drying; disintegrating; mixing the earthnut shell powder and alcohol evenly; adding into inorganic middle strong acid or organic strong acid; reacting for 1. 0-4. 0 h with temperature at 120-160 deg. c; adding into caustic soda solution; adjusting pH value to neutral; decreasing the temperature below 40 deg. c; putting into material; getting the alcohol of earthnut shell powder or carbinol liquefied product; getting lumber adhesive agent modifier for glued board in room; increasing water resistance of gummed product; decreasing methyl aldehyde delivery quantity; producing glued board with urea-formaldehyde glue. This adhesive possesses distinctive prepressing effect, which bonding strength at 1. 3MPa and formaldehyde delivery quantity at 4. 5mg / L.

Description

technical field

[0001] The invention relates to the preparation method of peanut shell liquefaction and adhesive modifier. The invention belongs to the technical fields of deep processing of agricultural by-products and wood adhesives. Background technique

[0002] Urea-formaldehyde resin adhesive is the most widely used adhesive in the wood industry. Its price is low, but it contains free formaldehyde. The glued products will slowly release formaldehyde gas during use and cause environmental pollution. Secondly, its glued water resistance is not ideal. At present, the main methods to solve the above problems include: in the preparation process of urea-formaldehyde glue, reduce the molar ratio of formaldehyde to urea, adopt the process of adding urea multiple times, modify with melamine, thiourea, polyvinyl alcohol, etc., or use it in urea-formaldehyde glue When adding formaldehyde scavenger (mainly chemical substances containing groups that react with formaldehyde). [00...