Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of wood and bamboo reinforced resin composites based on high pressure densification

A composite material and reinforced resin technology, applied in wood impregnation, wood treatment, impregnated wood, etc., can solve the problem of low added value of products

Active Publication Date: 2021-09-14
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, wood is mainly used in traditional fields such as furniture manufacturing, paper pulping, and wood-based panel production, and the added value of the product is low, which does not match the structural characteristics of wood itself.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of wood and bamboo reinforced resin composites based on high pressure densification

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The present invention is based on high-pressure compacted wood and bamboo reinforced resin composite material and preparation method thereof, comprising the following specific steps:

[0041] (1) Partial lignin and hemicellulose removal process: the starting raw material is wood veneer or waste board or bamboo sheet, using professional chemical reagents to remove part of lignin and hemicellulose in wood or bamboo, and washing with water Remove chemicals from lignin and hemicellulose wood or bamboo, and then use ethanol or acetone to replace the water in wood or bamboo;

[0042] The veneer is a wood board cut radially, chordwise or transversely from the wood, and the wood species is not particularly limited. The waste board is any discarded wood board, plywood, etc., without special limitation. The bamboo sheet is a sheet cut from bamboo, and the bamboo species include green bamboo, moso bamboo, and Ci bamboo. The thickness of the veneer, waste board, and bamboo sheet i...

Embodiment 1

[0063] Put poplar veneer (100mm×100mm×1mm) into NaOH (2.0mol / L) and NaOH at 80°C 2 SO 3 (0.5mol / L) mixed solution soaked for 2h, remove part of the lignin and hemicellulose in the veneer (removal rate is 50%), then use deionized water to repeatedly clean the veneer many times, remove excess chemical The substance was cleaned, and 5 similar veneers were prepared repeatedly, and then put into absolute ethanol, soaked for 30 minutes, and the water in the veneers was replaced. Flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and octaphenyl cage silsesquioxane (both additions are respectively 1% of resin weight) 5wt.%, 10wt.% in total), curing agent diphenyl sulfone (addition amount is 25wt.% of resin weight) added to E51 epoxy resin, stirred evenly, and then put the veneer into the resin mixing system, through vacuum impregnation The method is to infiltrate the resin into the veneer. Under vacuum conditions, the pressure in the vacuum tank is -0.02MPa, a...

Embodiment 2

[0065] Put poplar veneer (100mm×100mm×1mm) into NaOH (2.0mol / L) and NaOH at 80°C 2 SO 3 (0.5mol / L) mixed solution soaked for 2h, remove part of the lignin and hemicellulose in the veneer (removal rate is 40%), then use deionized water to repeatedly wash the veneer many times, remove excess chemical Clean the substance, then put it into acetone, soak for 30min, and replace the moisture in the wood; repeat the preparation of 4 similar veneers, and dry them naturally; then put them into a phenolic resin solution with a solid content of 25wt.%. Immerse in water for 10 minutes, take out the veneer, and let it dry naturally. Then put the veneer into an aqueous solution containing ammonium polyphosphate flame retardant (dimethyl methyl phosphate, the concentration of the flame retardant is 10wt.%) and soak for about 25min, so that the weight gain of the veneer reaches 10% (the weight gain of the flame retardant ), take out the veneer and let it dry again. Then five pieces of venee...

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
thicknessaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a wood and bamboo reinforced resin composite material based on high-pressure compaction, and belongs to the field of composite materials and wood-based panels. Use chemical reagents to partially remove lignin and hemicellulose from wood veneers, wood panels or bamboo sheets, remove the chemical reagents with water, and then replace the water with ethanol or acetone; put it into a resin system or resin solution and flame retardant agent, diluent and / or toughening agent and auxiliary agent in the mixed solution, or put into the resin system or resin solution, and the auxiliary agent mixed solution in turn, so that the resin and the auxiliary agent can penetrate into the cells and cell pores of wood or bamboo ; The semi-finished products are formed into blanks, and high-strength composite materials are prepared by high-pressure compaction and high-temperature curing. The invention overcomes the stress concentration problem caused by pores in the existing wood-based panels, and the new structural composite material prepared has good mechanical properties and flame-retardant properties, which greatly promotes the application of wood in structural fields such as aircraft, high-speed rail, and buildings .

Description

technical field [0001] The invention relates to a method for preparing wood and bamboo reinforced resin composite materials based on high-pressure densification, using wood or bamboo as a reinforcement to prepare a new type of high-strength structural composite material, which can be applied to high-strength aircraft, high-speed rail, buildings, etc. The field of structure belongs to the field of composite materials and wood-based panels. Background technique [0002] Fiber-reinforced resin-based composite materials are composite materials formed by reinforcing fiber materials and resins through winding, molding or pultrusion molding processes, due to their high specific strength, large specific modulus, performance designability, and good durability. The characteristics enable the material to meet the needs of modern structures that are large-span, high-rise, heavy-duty, light-weight and high-strength, and work under harsh conditions. It is more and more widely used in airc...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08B27K3/02B27K3/52B27K3/00B27K9/00
CPCB27D1/08B27K3/005B27K3/02B27K3/0207B27K3/52B27K9/002B27K2240/15B27K2240/30
Inventor 唐启恒邹淼郭文静
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com