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Environment-friendly toxic-free 3D printing consumable and preparation method thereof

A technology of 3D printing and consumables, applied in the direction of additive processing, etc., can solve the problems that the mechanical properties of synthetic materials are not significantly improved, the mechanical properties of consumables are not significantly improved, and cannot be promoted and applied on a large scale, so as to improve the finish and reduce production costs. , the effect of improving performance

Inactive Publication Date: 2017-09-05
TONGJI UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 3D printing is based on 3D CAD model data. It is a technology to manufacture 3D products by adding materials layer by layer through 3D printing equipment, also known as additive manufacturing. Currently, one of the factors restricting the development of 3D printing technology is the research and development of printing consumables. There are many, mainly polymers, composite materials, etc. When the consumables meet the requirements of efficient and precise molding, they will bring problems such as toxic substances and environmental pollution. Therefore, the development of green and non-toxic 3D printing consumables will become the focus of future 3D printing technology research. hotspot
[0004] At present, most 3D printing consumables are prepared by mixing straw and thermoplastic polymers. Straw is used as a filler to enhance the mechanical properties of composite materials. However, the straw content is low, and the mechanical properties of consumables are not significantly improved. However, the research on 3D printing consumables prepared with straw is very lacking.
[0005] Chinese Patent Publication No. 103937278A discloses a 3D printing wood-plastic composite material and its preparation method. The plant fiber is pulverized and dried, then modified with processing aids, then mixed with polyolefin material evenly, and extruded with twin-screws. The finished composite material is obtained by machine extrusion. The modified material has the appearance of wood and the processing characteristics of wood-plastic material, but the content of plant fiber is low, the mechanical properties of the synthetic material are not significantly improved, and the material will release during the melting process. Toxic gas, there are problems such as non-degradability, excessive use will inevitably bring about environmental problems, so it cannot be promoted and applied on a large scale

Method used

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  • Environment-friendly toxic-free 3D printing consumable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 5g of 100-mesh wheat straw, put it into a ball mill and mill it for 60 minutes;

[0027] (2) Put the milled wheat straw in a beaker, add 25g of acetic acid, seal it, soak at room temperature for 5 hours, and filter out excess acetic acid;

[0028] (3) Put the soaked wheat straw and 100ml of citric acid solution with a concentration of 15wt% in a three-necked flask equipped with a condenser, and react in a collector-type magnetic stirrer at 80°C and 600r / min for 12h;

[0029] (4) Cool the product obtained in step (3) to room temperature, adjust the pH to neutral, put it and 30ml of ethanol with a concentration of 95% in a centrifuge at a speed of 3000r / min for 30min, repeat the centrifugation three times, and obtain The precipitate was washed with deionized water, dried and pulverized at last;

[0030] (5) Weigh 0.1g of diatom frustules into a beaker, add 5ml of NaOH solution with a concentration of 6wt%, seal it, and soak it at room temperature for 5h;

[00...

Embodiment 2

[0034] (1) Weigh 5g of 150-mesh straw, put it into a ball mill and mill it for 60 minutes;

[0035] (2) Put the ball-milled straw into a beaker, add 30g of acetic acid, seal it, soak it at room temperature for 4 hours, and filter out excess acetic acid;

[0036] (3) Put the soaked rice straw and 100ml of 20wt% citric acid solution in a three-neck flask equipped with a condenser, and react in a 650r / min collector magnetic stirrer at 90°C for 15h;

[0037] (4) Cool the product obtained in step (3) to room temperature, adjust the pH to neutral, place it and 40ml of ethanol with a concentration of 95% in a centrifuge at a speed of 3500r / min for 25min, repeat the centrifugation three times, and obtain The precipitate was washed with deionized water, dried and pulverized at last;

[0038] (5) Weigh 0.12g of diatom frustules into a beaker, add 6ml of NaOH solution with a concentration of 6wt%, seal it, and soak it at room temperature for 5h;

[0039] (6) Put the product obtained in...

Embodiment 3

[0042] (1) Weigh 5g of 200-mesh corn stalks, put them into a ball mill and mill for 55 minutes;

[0043] (2) Put the ball-milled corn stalks in a beaker, add 30g of acetic acid, seal it, soak it at room temperature for 4 hours, and filter out excess acetic acid;

[0044] (3) Put the soaked corn stalks and 100ml of 20wt% citric acid solution in a three-necked flask equipped with a condenser, and react in a collector-type magnetic stirrer at 90°C and 750r / min for 15h;

[0045] (4) Cool the product obtained in step (3) to room temperature, adjust the pH to neutral, put it and 40ml of ethanol with a concentration of 95% in a centrifuge at a speed of 4500r / min for 25min, repeat the centrifugation three times, and obtain The precipitate was washed with deionized water, dried and pulverized at last;

[0046] (5) Weigh 0.13g of diatom frustules into a beaker, add 8ml of NaOH solution with a concentration of 6wt%, seal it, and soak it at room temperature for 6h;

[0047](6) Put the p...

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Abstract

The invention relates to an environment-friendly toxic-free 3D printing consumable and a preparation method thereof, belonging to the technical field of new materials. A new material is prepared from waste crop straws (main raw material) and diatom shells (auxiliary raw material) and can be applied to 3D printing. The preparation method specifically comprises the steps of carrying out ball-milling pretreatment on straw powder, soaking with acetic acid to activate the straw powder, heating the activated straw powder to react with citric acid, after the reaction is finished, cooling to the room temperature, adjusting the pH value to be neutral, adding ethanol, carrying out centrifugation, washing with deionized water, and drying to obtain modified straw powder, adding the straw powder, activated diatom shells and sorbitol, homogenizing and mixing so as to obtain a colloidal mixture, and drying, so as to obtain the environment-friendly toxic-free 3D printing consumable. By utilizing the preparation method, the environment-friendly toxic-free 3D printing consumable can be obtained; the consumable is high in strength and good in forming performance and has the characteristics of environmental friendliness, no toxin and the like; the waste straws and diatom shells are turned into wealth, so that the timber resource is saved, the utilization ratio of the timber is increased, the cost is greatly lowered, and meanwhile, the preparation method is of great significance to the environmental protection; and the manufacturing process is simplified, the production cost is lowered, and toxic waste liquid which is difficultly treated is not generated.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a green non-toxic 3D printing consumable and a preparation method thereof. Background technique [0002] 3D printing is based on 3D CAD model data. It is a technology to manufacture 3D products by adding materials layer by layer through 3D printing equipment, also known as additive manufacturing. Currently, one of the factors restricting the development of 3D printing technology is the research and development of printing consumables. There are many, mainly polymers, composite materials, etc. When the consumables meet the requirements of efficient and precise molding, they will bring problems such as toxic substances and environmental pollution. Therefore, the development of green and non-toxic 3D printing consumables will become the focus of future 3D printing technology research. hotspot. The 3D printing consumable of the present invention is a new material, which is green...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08K5/053C08K9/02C08K3/00B33Y70/00
CPCB33Y70/00C08K5/053C08K9/02C08L97/02
Inventor 万锕俊周后璋林贵娇岳卫东
Owner TONGJI UNIV
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