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A kind of vegetable protein adhesive and its preparation method and application

A plant protein and adhesive technology, which is applied in the preparation of animal glue or gelatin, protein adhesives, adhesives, etc., can solve the problems of pollution, unrealized green and renewable soybean protein adhesives, and achieve Easy to use, low price, and simple preparation method

Active Publication Date: 2019-07-12
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently used cross-linking agents use non-renewable petrochemical derivatives as raw materials, and the complete greening and regeneration of soybean protein adhesives have not been realized, and aldehydes and their derivatives, isocyanate substances and Other polymers are cross-linking agents, which will bring pollution problems of volatile harmful substances such as free formaldehyde and benzene series to soybean protein adhesives and their glued wood-based panels

Method used

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  • A kind of vegetable protein adhesive and its preparation method and application
  • A kind of vegetable protein adhesive and its preparation method and application
  • A kind of vegetable protein adhesive and its preparation method and application

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preparation example Construction

[0037] In the present invention, the preparation method of the glucose-lignin resin crosslinking agent preferably comprises the following steps:

[0038] Hydrolyzing the aqueous glucose solution under the catalysis of an acid catalyst to obtain a hydrolyzate system;

[0039] adjusting the pH value of the hydrolyzate system to 10-13 to obtain an alkaline hydrolyzate system;

[0040] The alkaline hydrolyzate system is polymerized with lignin to obtain a glucose-lignin resin cross-linking agent.

[0041] In the invention, the aqueous glucose solution is hydrolyzed under the catalysis of an acidic catalyst to obtain a hydrolyzed product system. In the present invention, the glucose is commercially available glucose well known to those skilled in the art. In the present invention, the acidic catalyst is preferably one or more of hydrochloric acid, sulfuric acid, nitric acid, hydrohalic acid and oxalic acid. The present invention does not have any special requirements on the conc...

Embodiment 1

[0069] A vegetable protein adhesive, based on the total mass of the adhesive raw material as 100%, each component and mass percentage in the raw material are as follows:

[0070]

[0071]

[0072] A preparation method of vegetable protein adhesive, the specific steps of the method are as follows:

[0073] (1) Put 300 kg of glucose and 100 kg of water into the reactor, mechanically stir at 80r / min for 10 minutes, then heat up to 60°C, add 5 kg of sulfuric acid, gradually heat up to 90°C and keep it warm for 3 hours, then cool down to 80°C, use 30% sodium hydroxide aqueous solution to adjust the pH value to 12, add 35 kg of enzymatic lignin, and carry out polymerization reaction. After the viscosity of the polymerized product (25°C) reaches 200MPa·s, cool down to 30°C, and discharge , to obtain the glucose-lignin resin crosslinking agent.

[0074] (2) 200 kilograms of defatted soy flour, 600 kilograms of water, 80 kilograms of guanidine hydrochloride and 5 kilograms of ma...

Embodiment 2

[0078] A vegetable protein adhesive, based on the total mass of the adhesive raw material as 100%, each component and mass percentage in the raw material are as follows:

[0079]

[0080] (1) Put 300 kg of glucose and 100 kg of water into the reaction kettle, stir mechanically at 80r / min for 10 minutes, then heat up to 60°C, add 5 kg of sulfuric acid, gradually heat up to 95°C and keep it warm for 1 hour, then cool down to 85°C, use 30% sodium hydroxide aqueous solution to adjust the pH value to 13, add 35 kg of alkali lignin, and carry out polymerization reaction. When the viscosity of the polymerization product (25°C) reaches 250MPa·s, cool down to 30°C, and discharge to obtain the obtained The above-mentioned cross-linking agent (glucose-lignin resin).

[0081] (2) 400 kilograms of defatted peanut powder, 450 kilograms of water, 20 kilograms of sodium dodecylbenzenesulfonate and 30 kilograms of mass concentration of 30% potassium hydroxide aqueous solution are dropped into...

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Abstract

The invention provides a plant protective adhesive as well as a preparation method and application thereof. The adhesive provided by the invention takes green raw materials as a cross-linking agent, and the prepared raw materials do not contain formaldehyde, so that the formaldehyde release problem of the adhesive is radically and completely solved, and therefore, the adhesive is greener and moreenvironmentally friendly. According to the results of the embodiment, the plant protein adhesive does not contain poisonous and harmful substances such as free formaldehyde and free benzene series compounds, and is completely green, so that a green and environmentally-friendly fine wooden board without harmful substance release can be manufactured. The plant protein adhesive prepared by the preparation method has viscosity of 4520-9860 MPa.s which is obviously greater than viscosity (3490-3610 MPa.s) of the adhesive prepared according to the methods 1-3.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a vegetable protein adhesive and its preparation method and application. Background technique [0002] With the reduction of forest resources and the shortage of wood, wood-based panels have become an important material in human production and life, and the wood-based panel industry has also developed by leaps and bounds. In 2016, the output of wood-based panels in my country has exceeded 350 million cubic meters, ranking first in the world. one. At present, the adhesives commonly used in the production of wood-based panels are formaldehyde-based synthetic resins, mainly urea-formaldehyde resins and their modified products. Wood-based panels made of urea-formaldehyde resin adhesives and wooden products such as furniture and floors will continuously release formaldehyde, pollute the indoor air environment, and endanger people's health. Formaldehyde pollution has become a hot iss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J11/08
Inventor 储富祥范东斌李改云陈媛晏婷婷杨昇
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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