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Manufacturing method for modified enzymolysis lignin composite board

A technology for enzymatic hydrolysis of lignin and a manufacturing method, which is applied in the field of composite board manufacturing, can solve problems such as human toxicity and composite board pollution, and achieve the effects of reduced production cost, low raw material cost and simple production process

Inactive Publication Date: 2012-04-25
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of polluting the environment and being toxic to the human body in the manufacture of composite boards with phenolic resin as an adhesive, and to provide a manufacturing method of modified enzymatically decomposed lignin composite boards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific Embodiment 1: The manufacturing method of the modified enzymatic lignin composite board in this embodiment is carried out according to the following steps: 1. Add enzymatic lignin and sodium hydroxide aqueous solution into the reactor at a mass ratio of 10 to 200:1, Stir and react at 30-65°C for 10 minutes, then add formaldehyde with a mass concentration of 37%, react at 50-100°C for 0.5h-5h and then cool down to obtain modified enzymatic lignin; 2. According to the mass ratio of 1:0.4 ~4 Add the modified enzymatic lignin and paper industry lignin or enzymatic lignin into the reactor, stir and mix evenly, then dry at 20~105°C until the moisture content is below 15% and spread it in the mold , press under the condition of 1-10MPa to obtain the molded body; 3. Put the molded body in a hot press, press the press at 150-250°C for 5-20 minutes, and then cool down to obtain the modified Enzymatically decomposed lignin composite board; wherein in step 1, formaldehyde ...

specific Embodiment approach 2

[0009] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, enzymatic lignin and sodium hydroxide aqueous solution are added to the reactor at a mass ratio of 20 to 180:1, and stirred at 35 to 60°C React for 10 minutes. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiment 1 in that in step 1, enzymatic lignin and sodium hydroxide aqueous solution are added to the reactor at a mass ratio of 80:1, and the reaction is stirred at 45° C. for 10 minutes. Other steps and parameters are the same as those in Embodiment 1.

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PUM

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Abstract

The invention discloses a manufacturing method for a modified enzymolysis lignin composite board, relating to a manufacturing method for a composite board, and solving the problems of polluting environment and having toxicity to human body caused by taking penolic resin as the adhesive to manufacture composite boards. The method comprises the following steps: 1, stirring enzymolysis lignin and sodium hydroxide water solution for reaction, adding formaldehyde, and lowering the temperature after reaction to obtain modified enzymolysis lignin; 2, evenly stirring and mixing the modified enzymolysis lignin with paper industry lignin or the enzymolysis lignin, drying, paving in a mould, and pressing to obtain a molding green body; and 3, placing the molding green body in a hot press, maintaining pressure and then lowering the temperature to obtain the modified enzymolysis lignin composite board. In the invention, phenolic resin does not need to be used as the adhesive, and phenol from petrochemical industry does not need to be consumed too, thereby lowering the production cost by 40%-50%, having no environmental pollution, avoiding toxicity of the phenol to human body, and having low raw material cost, excellent product performance and simple production process.

Description

technical field [0001] The invention relates to a method for manufacturing a composite board. Background technique [0002] Wood is used as raw material, phenolic resin is used as adhesive, and composite boards are manufactured through sizing, hot-pressing and other processes. Rise again, cause phenol price to be expensive, at the same time phenol will pollute the environment, and is toxic to the human body (such as: can be inhaled, ingested or absorbed through the skin, has a strong corrosive effect on the skin and mucous membranes, can inhibit the central nervous system Nerves or damage to liver and kidney functions, inhalation of high concentration vapor can cause headache, dizziness, fatigue, blurred vision, pulmonary edema, etc. With blood, there is a possibility of gastrointestinal perforation, shock, pulmonary edema, liver or kidney damage, acute renal failure, and death of respiratory failure; eye contact can cause burns; it can be absorbed through burned skin, afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/02B27N3/14
Inventor 李淑君王海刚杨旸郭国万刘威杨冰冰赵小敏
Owner NORTHEAST FORESTRY UNIVERSITY