Glue-permeation-free plant protein sucrose-based environment-friendly adhesive for plywood as well as preparation method and application of glue-permeation-free plant protein sucrose-based environment-friendly adhesive

Abstract

The invention discloses a glue-permeation-free plant protein sucrose-based environment-friendly adhesive for plywood. The adhesive comprises the following components in parts by weight: 100 parts of sucrose; 20-40 parts of ammonium dihydrogen phosphate; 3-4 parts of sodium pyrosulfite; 2-4 parts of sodium carboxymethyl cellulose; 0.03-1 part of sodium dodecyl benzene sulfonate; 4-5 parts of boric acid; 3-5 parts of potassium hydroxide; 0.5-2 parts of citric acid; 10-25 parts of defatted soybean protein; 10-25 parts of dephenolized cottonseed protein and 27-55 parts of water. The invention further discloses a preparation method of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive for the plywood and an application of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive to preparation of the plywood. According to the glue-permeation-free plant protein sucrose-based environment-friendly adhesive for the plywood as well as the preparation method and the application of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive, the glue permeation defect occurring when a traditional sucrose-based adhesive is used for preparing the plywood is overcome, and the problem of glue permeation on the surface of the plywood is obviously solved.

Description

technical field [0001] The invention relates to a non-penetrating vegetable protein sucrose-based environmental-friendly adhesive for plywood, a preparation method and application thereof, and belongs to the technical field of adhesives. Background technique [0002] At present, my country's wood adhesives are still dominated by "trialdehyde" glue, including urea-formaldehyde resins, phenolic resins and melamine-formaldehyde resins, accounting for more than 80% of the total output of wood adhesives, of which urea-formaldehyde resins are still used in the manufacture of wood-based panels. The species with the largest amount of use accounts for about 60% to 70% of the total. Urea-formaldehyde resin adhesives have sufficient raw materials and low prices. The price is about 1 / 4~1 / 3 of the price of phenolic resin and melamine resin, and 1 / 20~1 / 10 of the price of epoxy resin, unsaturated polyester resin and polyurethane. . In addition, it also has many performance advantages, suc...

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Problems solved by technology

On the other hand, synthetic resin adhesives are highly dependent on petroleum. With the increasing shortage of petroleum resources in the world, the price of petroleum is rising day by day, which makes the market cost of petroleum-derived adhesives rise sharply.

[0003] In addition, the existing wood adhesives generally have the problems of insufficient cross-linking structure of the adhesive and glue bleeding, such as figure 1 This is the electron micrograph of the cured sucrose-based (SADP) adhesive in the prior art. Observed by a scanning electron microscope (SEM), the surface of the SADP adhesive has large and numerous holes, and no dense adhesive layer is formed; figure 2 Plywood prepared for prior art SADP sucrose-based adhesives, figure 2 The black part is the oozing glue, which seriously affects the quality and appearance of plywood products

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