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A kind of geopolymer-based wood adhesive and its preparation method and application

A technology of geopolymers and wood adhesives, applied in the direction of adhesives, inorganic adhesives, adhesive additives, etc., can solve the problems of poor interfacial compatibility of wood raw materials, high brittleness of geopolymers, and poor bonding strength, etc., and achieve good Adhesive performance, low production cost, low price effect

Active Publication Date: 2021-03-19
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention can effectively solve the technical problems of high brittleness and poor toughness of geopolymers, it has the defects of poor interface compatibility with wood raw materials, weak bonding, and poor bonding strength, which makes it difficult for existing geopolymers to be glued with high strength. wood raw material

Method used

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  • A kind of geopolymer-based wood adhesive and its preparation method and application
  • A kind of geopolymer-based wood adhesive and its preparation method and application
  • A kind of geopolymer-based wood adhesive and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A kind of environment-friendly high-performance geopolymer-based wood adhesive, its formula is calculated as:

[0056]

[0057] (1) Dissolve 40 parts of sodium hydroxide in 100 parts of distilled water and stir magnetically at 500 rpm for 30 min at a rotating speed. After cooling to room temperature, set the volume to a sodium hydroxide aqueous solution with a concentration of 10 mol / L;

[0058] (2) Mix the above 100mL aqueous sodium hydroxide solution with a concentration of 10mol / L and 250mL aqueous sodium silicate solution with a modulus of 1.5 at a speed of 1000rpm for 120min with magnetic stirring, and leave it at room temperature for 24h to obtain an alkali-excited solution with a modulus of 1.3. agent.

[0059] (3) Add 1 / 2 parts by mass of polyurethane to the alkali activator prepared in (2), and stir magnetically at a speed of 500 rpm for 30 minutes for mixing to form a stable solution.

[0060] (4) Mix the solution described in (3) with 1000 mesh metakaolin...

Embodiment 2

[0064] An environment-friendly high-performance geopolymer-based wood adhesive, the formula of which is calculated in parts by mass:

[0065]

[0066] (1) Dissolve 40 parts of sodium hydroxide in 100 parts of distilled water and stir magnetically at 500 rpm for 30 min at a rotating speed. After cooling to room temperature, set the volume to a sodium hydroxide aqueous solution with a concentration of 10 mol / L;

[0067] (2) Mix the above 100mL aqueous sodium hydroxide solution with a concentration of 10mol / L and 250mL aqueous sodium silicate solution with a modulus of 1.5 at a speed of 1000rpm for 120min with magnetic stirring, and leave it at room temperature for 24h to obtain an alkali-excited solution with a modulus of 1.3. agent.

[0068] (3) Add 1 / 2 parts by mass of polyurethane to the alkali activator prepared in (2), and stir magnetically at a speed of 500 rpm for 30 minutes for mixing to form a stable solution.

[0069] (4) Mix the solution described in (3) with 1000...

Embodiment 3

[0073] An environment-friendly high-performance geopolymer-based wood adhesive, the formula of which is calculated in parts by mass:

[0074]

[0075] (1) Dissolve 40 parts of sodium hydroxide in 100 parts of distilled water and stir magnetically at 500 rpm for 30 min at a rotating speed. After cooling to room temperature, set the volume to a sodium hydroxide aqueous solution with a concentration of 10 mol / L;

[0076] (2) Mix the above 100mL aqueous sodium hydroxide solution with a concentration of 10mol / L and 250mL aqueous sodium silicate solution with a modulus of 1.5 at a speed of 1000rpm for 120min with magnetic stirring, and leave it at room temperature for 24h to obtain an alkali-excited solution with a modulus of 1.3. agent.

[0077] (3) Add 1 / 2 parts by mass of polyurethane to the alkali activator prepared in (2), and stir magnetically at a speed of 500 rpm for 30 minutes for mixing to form a stable solution.

[0078] (4) Mix the solution described in (3) with 1000...

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Abstract

The invention relates to an environmentally-friendly high-performance geopolymer-based wood adhesive and a preparation method and application thereof. The geopolymer-based wood adhesive is prepared from the following raw materials (by weight): 100 parts of a base material, 1-20 parts of an organic dopant, 87.5-280 parts of an alkali activator, 0.3-1 part of an initiator, 1-2.4 parts of a couplingagent, 1-2.4 parts of an emulsifier, 0.4-1.6 parts of an antifoaming agent and 50-200 parts of water. After the organic dopant is solidified, a chain or net structure can be formed. Thus, the chain ornet structure and the geopolymer form interpenetrating networks to achieve the toughening modification effect, and a mechanical locking effect with the wood material can also be achieved. The geopolymer-based wood adhesive is green and environmentally friendly; the sources of raw materials are wide; production cost is low; and the process is simple. The geopolymer-based wood adhesive is non-flammable, has no release of formaldehyde and has good bonding performance. The geopolymer-based wood adhesive is instant to use when prepared and the formula can be adjusted flexibly. The geopolymer-basedwood adhesive can be used to glue wooden raw materials such as wood, bamboo, straw and the like and to prepare wooden composite materials such as particle boards, fiberboards, plywoods, reconstitutedwood / bamboo and the like, and has industrial application value.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to an environmentally friendly high-performance geopolymer-based wood adhesive and a preparation method thereof. Background technique [0002] Compared with traditional wood organic synthetic adhesives such as urea-formaldehyde resin, phenolic resin, and melamine-formaldehyde resin, wood inorganic adhesives are environmentally friendly, have no free formaldehyde release, excellent performance, and are non-flammable. A sustainable wood composite industry has enormous development advantages and potential. Among them, ordinary portland cement is one of the wood inorganic adhesives widely used in the field of wood composite materials, but the dust and a large amount of carbon dioxide generated during the production process not only pollute the air, endanger human health, but also aggravate global warming and other environmental issues. [0003] Geopolymer, also known as alkali activated cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J1/00C09J11/06C09J11/08
CPCC09J1/00C09J11/06C09J11/08
Inventor 叶翰舟张扬于志明母军
Owner BEIJING FORESTRY UNIVERSITY
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