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Formaldehyde-free soybean glue as well as preparation method and application thereof

A technology of soybean gum and soybean meal, which is applied in the field of formaldehyde-free soybean gum and its preparation, can solve the problems of free formaldehyde release, poor water-resistant bonding performance, and poor strength, and achieve no harmful substance release and good water-resistant bonding performance , good dry strength effect

Active Publication Date: 2021-11-16
HUBEI FUHAN WOOD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 problems such as poor water resistance and poor strength, which limit their use. Industrial application

Method used

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  • Formaldehyde-free soybean glue as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a soybean gum of the present invention and a preparation method thereof.

[0045] Concrete formula is counted as in parts by weight:

[0046] 20 parts of soybean meal; 50 parts of dispersant; 0.8 parts of toughening agent; 10 parts of strengthening agent; 10 parts of water.

[0047] The specific preparation method is as follows:

[0048] 1. Preparation of dispersant glucose / guanidine hydrochloride deep eutectic solvent: mix glucose / guanidine hydrochloride at a weight ratio of 1:1 and heat to 70°C.

[0049] 2. Preparation of toughening agent aminated graphene:

[0050] In a four-necked flask equipped with an electric stirrer, a condenser and a thermometer, add 1.05 moles of diethylenetriamine and 1 mole of succinic anhydride into the four-necked flask for stirring, and react two After one hour, the temperature was raised to 140° C. for three hours to undergo polycondensation reaction, and then the heating was stopped, and the flask and reactan...

Embodiment 2

[0057] This embodiment provides a soybean gum of the present invention and a preparation method thereof.

[0058] Concrete formula is counted as in parts by weight:

[0059] 20 parts of soybean meal; 50 parts of dispersant; 0.8 parts of toughening agent; 10 parts of strengthening agent; 10 parts of water.

[0060] The specific preparation method is as follows:

[0061] 1. Preparation of dispersant glucose / guanidine hydrochloride deep eutectic solvent: mix glucose / guanidine hydrochloride at a weight ratio of 1:1 and heat to 70°C.

[0062] 2. Preparation of toughening agent aminated graphene:

[0063] In a four-necked flask equipped with an electric stirrer, a condenser and a thermometer, add 1.01 moles of diethylenetriamine and 1 mole of succinic anhydride into the four-necked flask for stirring, and react two After one hour, the temperature was raised to 140° C. for three hours to undergo polycondensation reaction, and then the heating was stopped, and the flask and reactan...

experiment example 1

[0091] In this experimental example, the soybean gum obtained in the above-mentioned examples and comparative examples was tested.

[0092] Specifically, the three-layer plywood was prepared with the soybean gum obtained in the above-mentioned examples and comparative examples, so as to test the bonding strength.

[0093] Basswood veneer: dry to 10% moisture content; size 40cm*40cm*0.15cm.

[0094] Lamination is carried out according to the following normal preparation process:

[0095] Sizing: the amount of glue applied is 360g / m 2 .

[0096] Hot pressing conditions: pressure 0.8MPa, temperature 110°C, time 8 minutes.

[0097] According to GB / T17657-1999 "Experimental Methods for Physical and Chemical Properties of Wood-Based Panels and Decorated Wood-based Panels", the test is carried out on the performance testing method of horizontal panel products. The measurement of all plywood samples is repeated six times, and the average value is taken.

[0098] The toughness test...

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Abstract

The invention relates to the technical field of biomass adhesives, and particularly discloses formaldehyde-free soybean glue as well as a preparation method and application thereof. The soybean glue comprises soybean meal, a dispersing agent, a toughening agent, a reinforcing agent and water. The dispersing agent is a glucose / guanidine hydrochloride eutectic solvent, and the toughening agent is aminated graphene. The reinforcing agent is an aqueous solution of modified polyamide polyamine epichlorohydrin. The soybean glue disclosed by the invention can easily form a cross-linked structure and has high cross-linking density, and the prepared soybean glue is stable in performance, obviously reduced in weak interface layer, good in dry strength, good in water-resistant cementing performance and stable in product quality. The water resistance and process requirements of a plywood adhesive can be met, and the practical performance of a biomass adhesive is ensured.

Description

technical field [0001] The invention relates to the technical field of biomass adhesives, in particular to a formaldehyde-free soybean gum and its preparation method and application. Background technique [0002] Precious wood resources are relatively scarce, and artificial forest resources are abundant. Using artificial forest fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture, flooring, and interior decoration in human settlements. The total output of wood-based panels is large, and most of them are plywood products. . Based on the average production of 9 cubic meters of wood-based panels per ton of adhesive, the consumption of adhesives for plywood is huge (solid content 50%), among which urea-formaldehyde resin and its modified products account for the dominant position of adhesives. Urea-formaldehyde resin adhesives are widely used in the wood industry due to the advantages of sufficient raw materials, low price, and...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/04C09J11/08C09J11/00C08G69/48B27D1/08
CPCC09J189/00C09J11/04C09J11/08C09J11/00C08G69/48B27D1/08C08G2170/00C08L77/06C08K9/08C08K3/04
Inventor 韩萌萌孙刚项柳高鹏刘尧高强李建章李京超
Owner HUBEI FUHAN WOOD IND