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Environment-friendly high-strength lignocellulose plate and preparing method thereof

A lignocellulosic, high-strength technology, applied in the field of environment-friendly high-strength lignocellulose board and its preparation, can solve the problem of lack of molding formula, unstable performance and inconvenient use of the new environment-friendly high-strength lignocellulose board manufacturing method and other problems to achieve the effect of overcoming interface incompatibility, solving formaldehyde release, and expanding application fields

Inactive Publication Date: 2016-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the usual glue-free lignocellulose board does not contain formaldehyde, it generally has low strength and unstable performance, which brings inconvenience to use
[0004] At present, there is still a lack of new environmentally friendly high-strength lignocellulose board manufacturing methods and related molding formulas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of an environment-friendly high-strength lignocellulose board, comprising the following steps:

[0035] (1) Pretreatment of plant raw materials

[0036] Utilize claw crusher to crush eucalyptus into coarsely crushed lignocellulose powder with a size less than 40 meshes, and then sieve 60 to 100 mesh lignocellulose powders therefrom (the present invention can also be realized without taking the sieving step. technical effect, in the present embodiment, increasing the sieving step can make the raw material size more uniform, which is more conducive to the subsequent molding effect), weigh 360g lignocellulose powder (based on the dry weight of lignocellulose powder );

[0037] (2) Mixing with adhesive

[0038] Spray PVA-0588 into the lignocellulose powder (the PVA added here is in the form of PVA aqueous solution, and the preparation process is as follows: Weigh 36g of PVA and dissolve it in hot water (1440mL) at 75°C for 30min, and keep stirring to ...

Embodiment 2

[0050] A preparation method of an environment-friendly high-strength lignocellulose board, comprising the following steps:

[0051] (1) Pretreatment of plant raw materials

[0052] A. Crushing: Use a claw crusher to crush eucalyptus into coarse lignocellulose powder with a size ranging from 2 to 80 meshes, then add an appropriate amount of water to adjust the moisture content of the coarse lignocellulose powder to 50%, and seal it Place for 12h;

[0053] B. Flash explosion treatment

[0054]Adopt continuous steam explosion extruder to carry out continuous flash explosion treatment (flash explosion treatment 4 times, flash explosion temperature 120 ~ 150 ℃, pressure 1 ~ 1.5MPa) to above-mentioned coarse crushed lignocellulose powder, then in the drum of 80 ℃ Dry 10h in the air drying oven to obtain lignocellulose fibers, take 360g of lignocellulose fibers (based on the absolute dry weight of lignocellulose fibers), and set aside;

[0055] (2) Mixing with adhesive

[0056] A...

Embodiment 3

[0068] A preparation method of an environment-friendly high-strength lignocellulose board, comprising the following steps:

[0069] (1) Pretreatment of plant raw materials

[0070] A. Crushing: Use a claw crusher to crush eucalyptus into coarse lignocellulose powder with a size ranging from 2 to 80 meshes, then add an appropriate amount of water to adjust the moisture content of the coarse lignocellulose powder to 50%, and seal it Place for 12h;

[0071] B. Flash explosion treatment

[0072] Adopt continuous steam explosion extruder to carry out continuous flash explosion treatment (flash explosion treatment 4 times, flash explosion temperature 120 ~ 150 ℃, pressure 1 ~ 1.5MPa) to above-mentioned coarse crushed lignocellulose powder, then in the drum of 80 ℃ Dry in an air drying oven for 10 hours to obtain lignocellulose fibers, weigh 360 g of lignocellulose fibers (based on the dry weight of the lignocellulose fibers), and set aside.

[0073] (2) Mixing with adhesive

[0...

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Abstract

The invention discloses an environment-friendly high-strength lignocellulose plate and a preparing method thereof. The preparing method of the environment-friendly high-strength lignocellulose plate comprises the following steps that firstly, plant raw material pretreatment is conducted, lignocellulose powder with the size smaller than 40 meshes is directly taken, or, plant raw materials rich in lignocellulose fiber are utilized for conducting flash explosion treatment, and the lignocellulose fiber is obtained, wherein the size of the plant raw materials rich in lignocellulose fiber ranges from 2 meshes to 80 meshes; secondly, the lignocelluloses fiber is mixed with a bonding agent, and the bonding agent is PVA and / or gelatin; thirdly, paving is conducted; fourthly, hot pressing is conducted; and fifthly, cooling forming is conducted. The preparing method of the environment-friendly high-strength lignocellulose plate is simple in process, usage of reagents such as acid and alkali is avoided in the whole process, pollution is avoided, and environment friendliness is achieved. The prepared environment-friendly high-strength lignocellulose plate is high in mechanical strength, and pollution-free and high-valued comprehensive utilization of renewable resources is achieved.

Description

technical field [0001] The invention relates to the field of wood-based panels, in particular to an environment-friendly high-strength lignocellulose board and a preparation method thereof. Background technique [0002] Lignocellulose is the main substance that constitutes the plant cell wall, and its main components are cellulose, hemicellulose and lignin. Lignocellulose is a new type of environmentally friendly material with wide sources, degradability, low cost, and excellent mechanical properties. The composite materials prepared are widely used in daily life such as construction and decoration. Therefore, it has broad market prospects and good social and economic benefits. [0003] The use of waste lignocellulose to prepare lignocellulose boards is an important way to utilize plant resources. At present, the utilization of waste lignocellulose is mainly divided into two categories. The first category is wood-plastic composite materials. It is generally mixed with PP, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N1/02B27N3/12B27N3/20
CPCB27N1/00B27N1/02B27N3/12B27N3/20B27N3/203B27N3/007B27N3/02B27N3/04
Inventor 冯彦洪蓝骏山马鹏涛瞿金平何和智
Owner SOUTH CHINA UNIV OF TECH
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