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A method for manufacturing environmentally friendly wood-based panels from cotton stalks

An environmentally friendly wood-based panel and cotton stalk technology, which is applied in the field of panel manufacturing, can solve the problems of trialdehyde glue pollution, difficulty, and difficulty in wood-based panel technology, and achieve the effects of simple production process, low cost, and excellent mechanical properties

Active Publication Date: 2021-03-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual application process of this kind of innovation, it will encounter the problems of technical difficulties in the preparation process of wood-based panels and insufficient performance of wood-based panels.
[0010] The main deficiency of the above innovation directions in the field of wood-based panels is that it is difficult to use a low-cost and feasible solution to solve the problem of trialdehyde glue pollution in the traditional wood-based panel industry
The main crux is that it is difficult to meet the requirements of easy availability of raw materials, environmental protection of adhesives, simple and easy preparation process and excellent performance of wood-based panels

Method used

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  • A method for manufacturing environmentally friendly wood-based panels from cotton stalks

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 5000g of cotton stalks with bolls and roots removed, the cotton stalks were separated by hand, branches, leaves, cortex and pith were removed to obtain 3000g of cotton stalk lignocellulosic components, which were processed into shavings and scraps by using a ring planer. Dried in a blast oven to a final moisture content of 3wt% for later use.

[0028] The branches, leaves, cortex and pith of cotton stalks separated by hand are 2000g raw materials, put into a pulverizer and crushed to below 80 mesh, take 1000g of crushed powder, add a mixed solvent composed of 600g of water, 4800g of ethanol, and 600g of phenol, and then add it to a 10L high-pressure In the stainless steel reactor, the temperature was raised from 25°C to 120°C at a rate of 5°C per minute, kept stirring at a speed of 400r / min, and the pressure inside the reactor was controlled at 0.8MPa, and kept for 20 minutes. After the reaction is completed, quickly pass cooling water to reduce the temperature in the r...

Embodiment 2

[0031] Remove 10,000 kg of cotton stalks with bolls and roots, use a cotton stalk skin core separator and a pulverizer to separate the cotton stalk core from the cotton stalk skin, remove branches, leaves, cortex and pith by winnowing, and obtain the lignocellulosic component of cotton stalks 7000Kg, after it is processed into shavings and scraps by a ring flaker, it is dried to a final water content of 4wt% by a drum dryer for subsequent use.

[0032] The 3000Kg of cotton stalk leaves, cortex and pith core obtained by winnowing are pulverized by a pulverizer to below 80 mesh, 1000Kg of crushed powder is taken, and a mixed solvent composed of 3000Kg of ethanol and 3000Kg of phenol is added to a 10000L high-pressure stainless steel reaction kettle to 5°C raise the temperature from 25°C to 120°C per minute, keep stirring at a speed of 400r / min, control the pressure in the reactor to 0.8MPa, and keep the pressure for 20 minutes. After the reaction is completed, quickly cool the bri...

Embodiment 3

[0036] Remove 10,000Kg of cotton stalks with bolls and roots, and use a cotton stalk skin-core separator to separate the cotton stalk core from the cotton stalk skin, remove branches, leaves, cortex, and pith by winnowing, and obtain 7,000Kg of cotton stalk lignocellulosic components. Crushed to less than 5 cm, put into an air-explosion tank, feed high-pressure steam, maintain the steam pressure at 1.5 MPa for 10 minutes, release the pressure to obtain steam-explosion cotton stalks, and dry to a final water content of 5 wt%.

[0037] Add 3000Kg of the remaining cotton stalk branches, leaves, cortex and pith to a pulverizer and crush it to below 80 mesh, take 1000Kg of crushed powder, add a mixed solvent composed of 3000Kg of ethanol and 3000Kg of phenol, and add it to a 10000L high-pressure reactor, and heat it at 5°C Raise the temperature to 120°C per minute, keep stirring at a speed of 400r / min, control the pressure in the reactor to 0.8MPa, and keep the pressure for 20 minut...

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Abstract

The invention discloses a method for manufacturing an environment-friendly artificial board by cotton stalks, and the environment-friendly artificial board obtained through the method. According to the method for manufacturing the environment-friendly artificial board by the cotton stalks provided by the invention, through recycling leftover cotton stalks generated by cotton production, the artificial board with no pollution (the formaldehyde emission is superior to the E0 standard), an excellent mechanical property, a simple production process and low cost is obtained. According to the artificial board, the cotton stalks are used for replacing wood raw materials, and the cotton stalks are converted into a biomass adhesive through chemical modification, so that the cotton stalks are fullymade into raw materials and are completely utilized, the waste cotton stalks are recycled, the green full-cotton-stalk artificial board is obtained, and the method is particularly suitable for solvingthe waste cotton stalk treatment problem in a cotton production area in China.

Description

Technical field: [0001] The invention belongs to the technical field of plate manufacture, and in particular relates to a method for manufacturing an environmentally friendly artificial board from cotton stalks, and an environmentally friendly artificial board obtained by the method. Background technique: [0002] Wood-based panels, as the name suggests, are boards made by adding chemical adhesives to the scraps produced during the processing of wood. There are many types of wood-based panels, commonly used particleboards, medium-density boards, blockboards (large core boards), plywood, and fireproof boards. They have different characteristics and are used in different manufacturing fields. The innovation of wood-based panels in the field of materials (excluding machines, equipment, etc.) is generally divided into two categories: 1 for raw materials; 2 for adhesives. [0003] 1 Among them, the innovation of raw materials mainly focuses on how to effectively replace traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N1/00B27N3/12B27N3/20C08L97/02
CPCB27N1/00B27N3/12B27N3/203C08L97/02C08L2205/025
Inventor 杨明宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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