A kind of activation method of wood fiber

A technology of wood fiber and activation method, which is applied in the field of activation and can solve the problem of low reactivity

Inactive Publication Date: 2019-02-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem of low reactivity of wood fiber pretreatment in the prior art, and provides a method for activating wood fiber

Method used

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  • A kind of activation method of wood fiber
  • A kind of activation method of wood fiber
  • A kind of activation method of wood fiber

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific embodiment one: the activation method of a kind of wood fiber of the present embodiment is to carry out according to the following steps:

[0022] 1. Prepare the mixed aqueous solution of alkali-polyethylene glycol-amino compound:

[0023] adding the base, polyethylene glycol and amino compound into water, stirring and dissolving to obtain a mixed aqueous solution of base-polyethylene glycol-amino compound;

[0024] The mass percent of alkali in the mixed aqueous solution of alkali-polyethylene glycol-amino compound is 5% to 10%; the mass percent of polyethylene glycol in the mixed aqueous solution of alkali-polyethylene glycol-amino compound 4% to 8%; the mass percentage of the amino compound in the alkali-polyethylene glycol-amino compound mixed aqueous solution is 4% to 8%;

[0025] The alkali is one or a mixture of sodium hydroxide and potassium hydroxide; the polyethylene glycol is polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400 ...

specific Embodiment approach 2

[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass percentage of alkali in the mixed aqueous solution of alkali-polyethylene glycol-amino compound described in step 1 is 6%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass percent of polyethylene glycol in the mixed aqueous solution of alkali-polyethylene glycol-amino compound described in step one is 6% . Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for activating wood fiber, and relates to an activating method, which mainly solves the problem of low reaction activity in pretreatment of the wood fiber in the prior art. The activating method comprises the following steps of 1, preparing an alkaline-polyethylene glycol-ammonia compound mixed water solution; 2, spraying the wood fiber; 3, freezing; 4, controlling the moisture content. The activating method has the advantages that by adopting the low-temperature freezing technique and utilizing the swelling and activating function of alkaline, polyethylene glycol and ammonia compound, the hydrogen bonds of cellulose and semi-cellulose in the wood fiber are destroyed, so as to reach the purpose of activating the wood fiber; under the heat action, more hydroxyls can attend the chemical reaction, so as to realize the glue-free laminating of the wood fibers in hot pressing. The activating method is suitable for the wood fiber.

Description

technical field [0001] The present invention relates to an activation method. Background technique [0002] my country is a Shaolin country with scarce forest resources. Since the 1990s, natural high-quality large-diameter timber has become less and less. Low-quality wood and small-diameter wood species have become the main raw materials for the wood processing industry. Therefore, making full use of logging residues, processing residues and inferior wood to develop wood-based panels and wood glued products is an effective measure to solve the contradiction between wood supply and demand. Most of the adhesives used in the wood processing industry are synthetic resin adhesives derived from petroleum products, such as phenolic resin and urea-formaldehyde resin. Although they can meet the requirements of gluing quality, there are still disadvantages, especially the formaldehyde release of wood-based panel products. Has become a hot spot of people's attention. For this reason,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H8/00
CPCC08H8/00
Inventor 邸明伟马盼盼赫羴姗郭明辉李坚
Owner NORTHEAST FORESTRY UNIVERSITY
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