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Ultralow VOC (volatile organic compound) vegetable protein adhesive for I-class plywood and preparation method of ultralow VOC vegetable protein adhesive

A technology of vegetable protein glue and plywood, applied in the preparation of animal glue or gelatin, protein adhesives, adhesives, etc., can solve the problems of poor water resistance bonding strength, environmental pollution, high cost, etc., to improve practical performance and mild reaction conditions , the effect of stable performance

Pending Publication Date: 2022-07-15
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of poor water-resistant bonding strength, high cost and environmental pollution caused by the extensive use of chemical cross-linking agents in vegetable protein adhesives, the active ingredients such as proteins and polysaccharides in the waste crop camellia meal and soybean meal are fully utilized, and added Low-cost reactive inorganic hybrid agent instead of chemical cross-linking agent, the purpose of this invention is to provide a kind of ultra-low VOC vegetable protein adhesive for Class I plywood

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The specific steps for preparing an ultra-low VOC vegetable protein adhesive for Class I plywood are as follows:

[0033] (1) Add 0.1 g of magnesium sulfate, 6 g of potassium dichromate, and 80 g of water to camellia oleifera meal, stir for 2.5 h, cool to room temperature, and adjust pH to 6 to obtain modified camellia oleifera meal;

[0034] (2) Add 2g of cationic polyacrylamide to 25g of water and stir for 15min;

[0035] (3) Continue to add 15g of modified camellia oil to the system, stir at 50°C for 15min and then add 5g of polyamide epichlorohydrin;

[0036] (4) Add 10g of grafted nano-modified montmorillonite to the system, and adjust the pH to 7;

[0037] (5) Finally, add 15 g of soybean meal and continue stirring for 10 min to obtain the adhesive.

Embodiment 2

[0039] The specific steps for preparing an ultra-low VOC vegetable protein adhesive for Class I plywood are as follows:

[0040] (1) Add 0.5 g of ferric sulfate, 10 g of potassium permanganate, and 100 g of water to camellia oleifera meal and stir for 3.5 h, cool to room temperature, and adjust pH to 7 to obtain modified camellia oleifera meal;

[0041] (2) Add 3g of polymethyldiamine to 30g of water and stir for 10min;

[0042] (3) Continue to add 10g of modified camellia oil to the system, stir at 55°C for 20min, and then add 5g of ethylene glycol monoglycidyl ether;

[0043] (4) Add 15g of nano-modified zinc oxide to the system, and adjust the pH to 8;

[0044](5) Finally, add 20 g of soybean meal and continue stirring for 10 min to obtain the adhesive.

Embodiment 3

[0046] The specific steps for preparing an ultra-low VOC vegetable protein adhesive for Class I plywood are as follows:

[0047] (1) Add 1 g of sodium sulfite, 12 g of hydrogen peroxide, and 90 g of water to camellia oleifera meal, stir for 3 hours, cool to room temperature, and adjust pH to 8 to obtain modified camellia oleifera meal;

[0048] (2) Add 6g of polyvinylamine to 50g of water and stir for 20min;

[0049] (3) Continue to add 20g of modified camellia meal to the system, stir at 70°C for 25min, and then add 10g of methanol-based propane triglycidyl ether;

[0050] (4) Add 20g of nano-modified calcium oxide to the system and adjust the pH to 8;

[0051] (5) Finally, add 10 g of soybean meal and continue stirring for 20 min to obtain the adhesive.

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Abstract

The invention relates to the technical field of woodworking adhesives for artificial boards, and particularly discloses an ultra-low VOC (volatile organic compound) vegetable protein adhesive for class-I plywood, namely a preparation method of a reactive inorganic cross-linking agent hybrid modified vegetable protein adhesive. The adhesive is prepared from modified oil-tea meal, soybean meal, a reactive inorganic cross-linking agent, a reinforcing agent, an organic cross-linking agent, a dispersion medium and the like. The adhesive provided by the invention is innovatively and thoroughly used for solving the problems of serious indoor VOC pollution and the like caused by low water-resistant strength (only meeting the strength requirement of national standard II-type plates) and addition of a large amount of chemical cross-linking agents in the existing known vegetable protein adhesive. A reaction type inorganic cross-linking agent reacts with various plant protein peptide chains to generate a covalent bond network interpenetrating structure complex, so that the water-resistant bonding strength reaches the national standard I-class plate strength requirement in a breakthrough manner for the first time, and the green plant protein adhesive which is low in cost, ultrahigh in water-resistant strength, ultralow in VOC indoor pollution and high in mildew resistance is realized.

Description

technical field [0001] The invention relates to the technical field of woodworking adhesives for wood-based panels, in particular to an ultra-low VOC vegetable protein adhesive for Class I plywood, that is, a hybrid modified vegetable protein adhesive using reactive inorganic cross-linking agents preparation method. Background technique [0002] Wood-based panels are one of the most widely used materials in my country, and are widely used in furniture and building materials. Adhesives play a vital role in the wood-based panel industry, but the main components of commercial adhesives are toxic and harmful. Most of the raw materials of aldehyde adhesives that cause environmental pollution come from non-renewable resources. With the increasingly fierce market competition in my country's wood adhesive industry and consumers' quality requirements for environmentally friendly products, renewable materials are used instead of aldehyde adhesives. Adhesives are the current development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J105/00C09J11/04
CPCC09J189/00C09J11/04C08K2003/2296C08K2003/2206C08K2003/3045C08L2205/04C08L89/00C08L5/00C08K3/346C08K3/22C08K3/30C08K3/36C08K9/10
Inventor 张伟王含章赵思齐蔡晴黎文欣
Owner BEIJING FORESTRY UNIVERSITY
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