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Preparation method of flame-retardant 3D printing wood dust material

A 3D printing and flame-retardant technology, which is applied in the field of polymer chemical materials, can solve the problems affecting the application of wood, poor mechanical strength, and flammability of wood, and achieve the effect of not easy biological adhesion, high mechanical strength, and changing the properties of wood

Inactive Publication Date: 2016-10-26
JIANGSU SOPO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wood is flammable, easy to decay, and has poor mechanical strength, which greatly affects the application of wood.

Method used

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  • Preparation method of flame-retardant 3D printing wood dust material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of 3D printing sawdust material, concrete steps are as follows:

[0021] 1. Put ordinary wood chips with a particle size of less than 1mmX1mmX1mm into the reactor, add benzene solvent to completely immerse it for 15 minutes, steam dry at 120°C, and vacuum to 100Pa to obtain wood chips with a water content of 7-12%;

[0022] 2. Use acetic anhydride to immerse the sawdust obtained in step 1, add acetic anhydride with a concentration of 40%, use benzene as a solvent, pressurize to 1MPa, react at 130°C for 8h, release the pressure and acetic anhydride, and vacuum to 100Pa to obtain The water content is 5-8% sawdust.

[0023] 3. Add benzene, KD-2 flame retardant, polyacrylonitrile-based carbon fiber and trimethylolpropane tris (3- aziridinyl propionate) bonding agent to the sawdust obtained in step 2, and heat it at 100° C. Mix and stir at 120°C to obtain a flame-retardant 3D printing wood chip material.

Embodiment 2

[0025] A kind of preparation method of 3D printing sawdust material, concrete steps are as follows:

[0026] 1. Put ordinary wood chips with a particle size of less than 1mmX1mmX1mm into the reactor, add toluene solvent to completely immerse it for 12 minutes, steam dry at 110°C, and vacuum to 150Pa to obtain wood chips with a water content of 8-13%;

[0027] 2. Use formic anhydride to immerse the sawdust obtained in step 1, add formic anhydride with a concentration of 30%, use toluene as a solvent, pressurize to 1MPa, react at 120°C for 10h, release the pressure, remove the formic anhydride, and evacuate to 150Pa to obtain The water content is 5-8% sawdust.

[0028] 3. Add toluene solvent, FRW flame retardant, glass fiber and trimethylolpropane tris (3- aziridinyl propionate) bonding agent to the sawdust obtained in step 2, and carry out at 100 ° C ~ 120 ° C Mix and stir to obtain a flame-retardant 3D printing wood chip material.

Embodiment 3

[0030] A kind of preparation method of 3D printing sawdust material, concrete steps are as follows:

[0031] 1. Put ordinary wood chips with a particle size of less than 1mmX1mmX1mm into the reaction kettle, add ethylbenzene solvent to fully immerse it for 10 minutes, steam dry at 100°C, and vacuum to 200Pa to obtain wood chips with a water content of 8-15%. ;

[0032] 2. Use acetic anhydride to immerse the sawdust obtained in step 1, add acetic anhydride with a concentration of 20%, ethylbenzene as a solvent, pressurize to 1MPa, react at 110°C for 8 hours, release the pressure and acetic anhydride, and vacuum to 200Pa to obtain Sawdust with a moisture content of 5-10%;

[0033] 3. Add ethylbenzene, ammonium dihydrogen phosphate-boric acid flame retardant, polyacrylonitrile-based carbon fiber and trimethylolpropane three (3- aziridinyl propionate) bonding agent to the sawdust obtained in step 2, Mix and stir at 100°C to 120°C to obtain a flame-retardant 3D printing wood chip...

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Abstract

The invention discloses a preparation method of a flame-retardant 3D printing wood dust material, comprising the steps: carrying out pretreatment, steam drying and vacuum pumping on common wood dust, submerging the wood dust with acid anhydride, and carrying out pressurizing and heating; after reaction ends, carrying out depressurizing, discharging of liquid, steam drying and vacuum pumping; and adding a solvent, a flame retardant, glass fibers and a cross-linking agent to obtain the flame-retardant 3D printing wood dust material. The preparation method has a simple production process, reduces processing steps and lowers production cost, and the prepared flame-retardant 3D printing wood dust material has superior properties and a wide range of application.

Description

technical field [0001] The invention relates to polymer chemical materials, in particular to a method for preparing flame-retardant 3D printing wood chip materials. Background technique [0002] 3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. [0003] 3D printing is usually achieved using digital technology material printers. It is often used to manufacture models in mold manufacturing, industrial design and other fields, and now it has been gradually used in the direct manufacture of some products. The technology has applications in industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields. [0004] Wood is composed of 90% cellulose, hemicellulose, lig...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08K7/06C08K7/14B33Y70/00
CPCC08K7/06B33Y70/00C08K3/38C08K7/14C08K2003/387C08L2201/02C08L97/02
Inventor 吴青龙盛建国朱桂生刘玲邵守言唐丽朱言萍
Owner JIANGSU SOPO GRP
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