Formaldehyde-free feather protein adhesive and preparation method thereof

Abstract

The invention relates to formaldehyde-free feather protein adhesive . The formaldehyde-free feather protein adhesive is prepared from the following components in parts by weight: 35 parts of feather meal, 0.1 to 0.3 part of bromelain, 72 parts of a dispersion medium, 0.5 to 1 part of an activating agent, 0.3 to 0.5 part of ethylene glycol diglycidyl ether and 0.9 to 1.2 parts of a curing agent, the dispersion medium is a fructose-guanidine hydrochloride-choline chloride eutectic solvent, the activating agent is a silane coupling agent KH550, and the curing agent is hydroxyethyl melamine. According to the formaldehyde-free feather protein adhesive prepared by the invention, bromelain is used for degrading feather protein molecules, and on the basis of degrading small molecules, the variety and number of feather protein reaction active groups are more effectively improved by using the activating agent; and feather protein molecules are recombined by using the fructose-guanidine hydrochloride-choline chloride eutectic solvent and ethylene glycol diglycidyl ether to form a protein adhesive prepolymer, and finally the curing agent is added to cure the feather protein adhesive, so that no harmful substance is released, and the product is high in reaction activity, good in solubility and good in water retention.

Description

technical field [0001] The invention relates to the technical field of biomass adhesives, in particular to an formaldehyde-free feather protein adhesive and a preparation method thereof. Background technique [0002] Precious wood resources are relatively scarce, and artificial forest resources are abundant. Using artificial forest fast-growing wood and adhesives to prepare wood-based panels is the main raw material for furniture, floors, and interior decoration in human settlements. The total output of wood-based panels is large, and most of them are plywood. product. Based on the average production of 9 cubic meters of plywood per ton of adhesive, the consumption of adhesives for plywood is huge, among which urea-formaldehyde resin and its modified products occupy the leading position in adhesives. Urea-formaldehyde resin adhesives are widely used in the wood industry due to the advantages of sufficient raw materials, low price, and good water solubility, but there is a p...

AI Technical Summary

Problems solved by technology

The use of biomass adhesives to prepare wood-based panels can solve the problem of free formaldehyde release from wood-based panels, which is an important way to solve the problem. However, most biomass adhesives have poor water resistance and bonding performance, which limits their industrial application.

For example, hydrolyzed feather protein can be used as raw material to prepare adhesives for wood-based panels to solve the problem of free formaldehyde release from wood-based panels, but hydrolyzed feather protein has a large amount of silicified cuticles, and the protein has a large molecular weight, resulting in poor water solubility and poor water resistance. , poor emulsification, poor solubility and other problems, it is difficult to apply to the production of wood-based panels

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