Manufacturing method for modified enzymolysis lignin composite board

A technology for enzymatic hydrolysis of lignin and a manufacturing method, applied in the field of composite board manufacturing, can solve problems such as environmental pollution and human toxicity of composite boards, and achieve the effects of low raw material cost, reduced production cost, and excellent performance.

Inactive Publication Date: 2010-07-28
NORTHEAST FORESTRY UNIVERSITY
View PDF4 Cites 8 Cited by
  • 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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0007] Specific embodiment 1: The manufacturing method of the modified enzymatic hydrolyzed lignin composite board of this embodiment is carried out according to the following steps: 1. Add the enzymatic hydrolyzed lignin and the aqueous sodium hydroxide solution into the reactor at a mass ratio of 10 to 200:1, Stir and react at 30~65℃ for 10min, then add formaldehyde with a mass concentration of 37%, react at 50~100℃ for 0.5h~5h and then cool down to obtain modified enzymatic hydrolyzed lignin; 2. According to mass ratio 1:0.4 ~4 Put the modified enzymatic lignin and paper industry lignin or enzymatic lignin into the reactor and stir and mix uniformly, then dry at 20~105℃ until the moisture content is below 15% and spread in the mold , Pressing under the conditions of 1-10MPa to obtain a shaped body; 3. Place the shaped body in a hot press, hold the pressure at 150~250℃ for 5~20min, and then lower the temperature to obtain the modification Enzymatically hydrolyzed lignin compo...

Example Embodiment

[0009] Specific embodiment two: This embodiment is different from specific embodiment one in that in step one, the enzymatic hydrolyzed lignin and sodium hydroxide aqueous solution are added to the reactor at a mass ratio of 20-180:1, and stirred at 35-60°C Reaction for 10min. Other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0010] Specific embodiment three: This embodiment is different from specific embodiment one in that in step one, the enzymatically hydrolyzed lignin and the aqueous sodium hydroxide solution are added to the reactor at a mass ratio of 80:1, and the reaction is stirred at 45° C. for 10 min. Other steps and parameters are the same as in the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Bending strengthaaaaaaaaaa
Elastic modulusaaaaaaaaaa
Bending strengthaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap