Preparation method of cellulose based 3D printing wire

A 3D printing, cellulose-based technology, applied in the field of preparation of cellulose-based 3D printing filaments, can solve the problem of unusable addition of cellulose, and achieve the effects of good shape, low production cost, and widening uses

Active Publication Date: 2016-02-03
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the problem that cellulose cannot be used for 3D printing materials in the existing methods or only uses cellulose as a material reinforcement with a very small amount of addition

Method used

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  • Preparation method of cellulose based 3D printing wire
  • Preparation method of cellulose based 3D printing wire
  • Preparation method of cellulose based 3D printing wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 20g of bleached coniferous wood chemical pulp board as a cellulose sample, use a pulverizer to grind it into powder, add 100g of polyethylene glycol with a molecular weight of 400, heat and swell at 120°C in an oil bath for 2h, and swell the swollen The final cellulose is crushed with high strength by a mechanical screw pressing device, and then the polyethylene glycol solution of the crushed cellulose is dispersed in a homogenizer for 10 minutes to obtain a polyethylene glycol dispersion of cellulose microfibers. Use a vacuum pump to filter and remove a large amount of polyethylene glycol in the polyethylene glycol dispersion of cellulose microfibers, then add dichloromethane to disperse and wash the cellulose microfibers under a homogenizer, and remove polyethylene glycol by repeated washing through filtration , until fully washed to obtain a dichloromethane suspension of cellulose microfibrils.

Embodiment 2

[0038] Take the cellulose microfiber dichloromethane suspension containing 1g of cellulose microfibrils and the PLA dichloromethane solution containing 9g PLA, mix them well at room temperature, stir them evenly at room temperature, mechanically stir them in a water bath at 60°C, and recover a large amount of Dichloromethane solvent, the remaining small amount of dichloromethane was removed by air drying and the cellulose microfiber / PLA composite material was obtained. The mechanical properties were tested by injection molding dumbbell and bar samples. The results showed that the tensile strength of the cellulose microfiber / PLA composite was 70.4MPa, the bending strength was 103.8MPa, and the elongation at break was 10.4%. The melt flow rate of the lower cellulose microfiber / PLA composite was 9.72g / 10min.

Embodiment 3

[0040] Take the cellulose microfiber dichloromethane suspension containing 3g of cellulose microfibers and the PLA dichloromethane solution containing 7g PLA and mix them well at room temperature and mix them evenly, mechanically stir them in a water bath at 60°C, and recover a large amount of Dichloromethane solvent, the remaining small amount of dichloromethane was removed by air drying and the cellulose microfiber / PLA composite material was obtained. The mechanical properties were tested by injection molding dumbbell and bar samples. The results showed that the tensile strength of the cellulose microfiber / PLA composite was 78.8MPa, the bending strength was 105.4MPa, and the elongation at break was 8.9%. The melt flow rate of the lower cellulose microfiber / PLA composite was 0.17g / 10min.

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Abstract

The invention relates to a preparation method of a cellulose based 3D printing wire, and belongs to the field of biomass based 3D printing materials. The invention aims to provide a preparation method of a biomass based 3D printing material, which is low in production cost and can implement industrialization easily. The preparation method comprises the following steps: processing a cellulose raw material by virtue of polyethylene glycol (PEG:MW=400) in combination with a machine to prepare a cellulose polyethylene glycol dispersed solution smaller than 10 microns; flushing away polyethylene glycol by using dichloromethane to obtain a dichloromethane suspension of cellulose; adding a certain amount of silane coupling agent to perform surface silanization modification; adding modified cellulose, plasticizer polyethylene glycol and toughening agent solution into a dichloromethane solution of polylactic acid with certain concentration, mixing uniformly, and then recovering to remove a dichloromethane solvent by virtue of a condensing unit; and finally, performing extrusion molding at a certain temperature by virtue of a linear extrusion molding machine to prepare the cellulose based 3D printing wire.

Description

technical field [0001] The invention belongs to the field of biomass-based 3D printing materials, in particular to a preparation method of cellulose-based 3D printing wire. Background technique [0002] Both cellulose and polylactic acid (PLA) are renewable and degradable polymers in nature. Cellulose can obtain cellulose microfibrils through a series of chemical or physical processes. The nearly perfect arrangement of cellulose molecular chains in cellulose microfibrils makes cellulose microfibrils have good mechanical properties and can be used as a reinforcing material to improve polymer polymerization. At the same time, cellulose microfibers have the advantages of low cost, low density, good mechanical properties, easy separation, regeneration, carbon dioxide sequestration, biodegradability, and chemical or physical modification. [0003] PLA is formed by the ring-opening polymerization of lactide, or the direct polymerization of lactic acid, which is obtained from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L1/04C08L97/02C08L71/02C08L67/04
Inventor 王志国徐军飞周小凡马金霞
Owner NANJING FORESTRY UNIV
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