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Preparation method of mineral fiber reinforced geopolymer-based wood adhesive

A wood adhesive and geopolymer technology is applied in the field of preparation of mineral fiber reinforced geopolymer-based wood adhesives, and can solve problems such as difficulty in achieving high-strength wood bonding, poor interface compatibility of wood raw materials, and high brittleness. problem, to achieve good bonding effect, low price, excellent durability and acid and alkali resistance

Inactive Publication Date: 2021-07-16
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent with the publication number CN101182152 discloses a preparation method of inorganic fiber reinforced inorganic polymer composite material. In this invention, chopped carbon fiber is used as a modifier, and metakaolin, potassium hydroxide solution and deionized water are used as preparation geological materials. The main raw material of polymers. Although this invention can effectively solve the problem of brittleness and poor toughness of geopolymers, it has the problem of poor interface compatibility with wood raw materials, which makes it difficult for existing geopolymers to achieve high-strength bonding with wood.

Method used

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  • Preparation method of mineral fiber reinforced geopolymer-based wood adhesive
  • Preparation method of mineral fiber reinforced geopolymer-based wood adhesive
  • Preparation method of mineral fiber reinforced geopolymer-based wood adhesive

Examples

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Effect test

Embodiment 1

[0044] A mineral fiber reinforced geopolymer-based wood adhesive, the preparation process of which mainly includes:

[0045] (1) Sorting basalt fibers with a sieve, the average length of the obtained fibers is 12mm, and the average fiber diameter is 17um; the ultrasonic dispersant is selected from sodium hexametaphosphate, and weighs 0.2g sodium hexametaphosphate according to the ratio of 1:5000 Dissolve the dispersant in 1L of distilled water and stir evenly to obtain a modified slurry with a concentration of 0.02%. Dissolve 5g of fibers obtained by sorting in the above slurry for ultrasonic pulverization and fiber separation. The total ultrasonic time is 60min and the power is 250W , the temperature is 25°C.

[0046] (2) Dissolve 60gNaOH in 500ml distilled water, stir magnetically for 30min, and rotate at 1000rpm, cool to room temperature, and constant volume to obtain a 1.5mol / L NaOH aqueous solution as a fiber surface treatment solution; dissolve 200gNaOH in 500ml distille...

Embodiment 2

[0052] A mineral fiber reinforced geopolymer-based wood adhesive, the preparation process of which mainly includes:

[0053] (1) Sorting basalt fibers with a sieve, the average length of the obtained fibers is 6mm, and the average fiber diameter is 17um; the ultrasonic dispersant is selected from sodium hexametaphosphate, and weighs 0.2g sodium hexametaphosphate according to the ratio of 1:5000 Dissolve the dispersant in 1L of distilled water and stir evenly to obtain a modified slurry with a concentration of 0.02%. Dissolve 5g of fibers obtained by sorting in the above slurry for ultrasonic pulverization and fiber separation. The total ultrasonic time is 60min and the power is 250W , the temperature is 25°C.

[0054] (2) Dissolve 80gNaOH in 500ml distilled water, stir magnetically for 30min, rotate at 1000rpm, cool to room temperature, and constant volume to obtain a 2.0mol / L NaOH aqueous solution as a fiber surface treatment solution; dissolve 200gNaOH in 500ml distilled wat...

Embodiment 3

[0060] A mineral fiber reinforced geopolymer-based wood adhesive, the preparation process of which mainly includes:

[0061] (1) Sorting basalt fibers with a sieve, the average length of the obtained fibers is 12mm, and the average fiber diameter is 17um; the ultrasonic dispersant is selected from sodium hexametaphosphate, and weighs 0.4g sodium hexametaphosphate according to the ratio of 1:5000 Dissolve the dispersant in 2L of distilled water and stir evenly to obtain a modified slurry with a concentration of 0.02%. Dissolve 10g of fibers obtained by sorting in the above slurry for ultrasonic pulverization and fiber separation. The total ultrasonic time is 60min and the power is 250W , the temperature is 25°C.

[0062] (2) Dissolve 80gNaOH in 500ml distilled water, stir magnetically for 30min, rotate at 1000rpm, cool to room temperature, and constant volume to obtain a 2.0mol / L NaOH aqueous solution as a fiber surface treatment solution; dissolve 200gNaOH in 500ml distilled w...

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Abstract

The invention relates to a preparation method of a mineral fiber reinforced geopolymer-based wood adhesive, which is characterized in that meta-kaolin with low production energy consumption and comprehensive performance superior to that of Portland cement is adopted, and an environment-friendly high-performance geopolymer-based wood adhesive is prepared after a geopolymer matrix is subjected to toughening modification through mineral fibers. According to the preparation method disclosed by the invention, the problems of fiber agglomeration and poor compatibility of a geopolymer serving as a wood inorganic adhesive and a wood adhesive interface are effectively solved mainly through three steps of fiber dispersion, fiber surface modification and reinforcement and toughening of a geopolymer matrix. The geopolymer-based wood adhesive prepared by the preparation method has the advantages of excellent mechanical properties, acid and alkali resistance, water resistance and the like, does not release formaldehyde, is green and environment-friendly, and has great industrial value in development and application in the field of wood adhesives.

Description

technical field [0001] The invention relates to the field of wood inorganic adhesives, in particular to a preparation method of mineral fiber reinforced geopolymer-based wood adhesives. Background technique [0002] Compared with traditional wood-organic adhesives, wood-inorganic adhesives have the advantages of environmental protection, greenness, no free formaldehyde release, and flame resistance. Among them, in the field of wood inorganic adhesives, ordinary portland cement is widely used at present. Compared with traditional portland cement, geopolymer raw materials are made from natural solid waste, and there is no The generation of dust and carbon dioxide is in line with the industry concept of advocating the development of green and environment-friendly materials, and has great social benefits. [0003] Geopolymer is a semi-crystalline or amorphous inorganic gelling polymer with a three-dimensional space network structure, which is formed by dissolving, dispersing, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J1/00C09J11/04
CPCC09J1/00C09J11/04
Inventor 张扬邓穆玲潘大卫张娜
Owner BEIJING FORESTRY UNIVERSITY