A high-content chitosan-filled 3D printing consumable and preparation method thereof

A 3D printing and chitosan technology, which is applied in the field of high-content chitosan-filled 3D printing consumables and its preparation, can solve the problems of cumbersome steps, difficulty in large-scale application, and low chitosan content, so as to alleviate oxidative degradation, The effect of protecting integrity

Active Publication Date: 2020-12-29
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on chitosan at home and abroad mostly adopts the solution method, the steps are cumbersome, and it is difficult to apply on a large scale. The melt extrusion production of chitosan is rarely reported.
At present, there are many studies on the combination of chitosan and polymer resin to form films and silk, but the content of chitosan is generally not high.

Method used

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  • A high-content chitosan-filled 3D printing consumable and preparation method thereof
  • A high-content chitosan-filled 3D printing consumable and preparation method thereof
  • A high-content chitosan-filled 3D printing consumable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. A high-content chitosan-filled 3D printing consumable, characterized in that:

[0054] (1) Formula according to weight percentage:

[0055] PLA50

[0056] TPU 14

[0057] Chitosan 35

[0058] Lanthanum stearate 0.3

[0059] Antioxidant 168 0.2

[0060] White oil 0.5

[0061] (2) Preparation method:

[0062] A. Vacuum dry PLA, TPU and chitosan for 12 h.

[0063] B. according to weight percentage formula, take by weighing PLA after drying, TPU, chitosan, then take by weighing lanthanum stearate, antioxidant 168, white oil;

[0064]C. Place the weighed components in a high-speed kneader, keep the speed at 2000 rpm, and stir at high speed for 20 min;

[0065] D. Add the above-mentioned fully mixed and uniform raw materials to the feeding port of the twin-screw extruder. The parameters of the twin-screw extruder are: the temperature of the first zone is 100 ℃, the temperature of the second zone is 115 ℃, the temperature of the third zone is 130 ℃, and the temperat...

Embodiment 2

[0070] 1. A 3D printing consumable filled with high chitosan, characterized in that:

[0071] (1) Formula according to weight percentage:

[0072] PLA 47

[0073] PBAT 11

[0074] Chitosan 41

[0075] Isooctyl tin dimethyl dimercaptoacetate 0.2

[0076] Antioxidant 1010 0.3

[0077] White oil 0.5

[0078] (2) Preparation method:

[0079] A. Vacuum dry PLA, PBAT, and chitosan for 12 h.

[0080] B. according to weight percentage formula, take by weighing PLA after drying, PBAT, chitosan, then successively take by weighing isooctyl tin dimethyl dimercaptoacetate, antioxidant 1010, white oil;

[0081] C. Place the weighed components in a high-speed kneader, keep the speed at 2500 rpm, and stir at high speed for 10 min;

[0082] D. Add the above-mentioned fully mixed and uniform raw materials to the feeding port of the twin-screw extruder. The parameters of the twin-screw extruder are: the temperature of the first zone is 110 ℃, the temperature of the second zone is 120 ℃, ...

Embodiment 3

[0087] 1. A 3D printing consumable filled with high chitosan, characterized in that:

[0088] (1) Formula according to weight percentage:

[0089] PLA 43

[0090] PBAT 11

[0091] Chitosan 45

[0092] Lanthanum stearate 0.3

[0093] Antioxidant 1067 0.3

[0094] White oil 0.4

[0095] (2) Preparation method:

[0096] A. Vacuum dry PLA, PBAT, and chitosan for 12 h.

[0097] B. according to weight percentage formula, take by weighing dried PLA, PBAT, chitosan, then take by weighing lanthanum stearate, antioxidant 1067, white oil;

[0098] C. Place the weighed components in a high-speed kneader, keep the speed at 1000 rpm, and stir at high speed for 40 min;

[0099] D. Add the above-mentioned well-mixed and uniform raw materials to the feeding port of the twin-screw extruder. The parameters of the twin-screw extruder are: the temperature of the first zone is 103 °C, the temperature of the second zone is 117 °C, the temperature of the third zone is 132 °C, and the temperat...

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PUM

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Abstract

The invention discloses a high-content chitosan-filled 3D printing consumable and a preparation method thereof. According to the technical scheme, the high-content chitosan-filled 3D printing consumable is composed of, by weight percentage, 35-60% of PLA (polylactic acid), 5-25% of flexibilizer, 30-55% of chitosan, 0.1-2% of thermal stabilizer, 0.1-1% of antioxidant and 0.1-1% of white oil. The preparation method of the high-content chitosan-filled 3D printing consumable comprises (1) drying, (2) material weighing, (3) mixing, (4) extrusion and pelletizing, (5) wire forming and (6) cooling androlling. The prepared high-content chitosan-filled 3D printing consumable is high in content of chitosan, so that printed products can be high in stability, achieve adsorbing effects on heavy metal ions in water, avoid blocking a spray nozzle during a printing process and achieve practical value.

Description

technical field [0001] The invention belongs to a high-content chitosan-filled 3D printing consumable and a preparation method thereof. Background technique [0002] In terms of FDM 3D printing materials, PLA is currently the most widely used material, with low warpage, excellent melt fluidity and adhesion, no unpleasant smell during printing, excellent mechanical properties, and is a biodegradable material And favored by the industry. However, due to the high brittleness of PLA, its further application is limited. Blending tougheners with PLA can not only improve PLA's brittleness and slow crystallization speed, but also improve its toughness. [0003] Although FDM 3D printing technology is popularized rapidly, it is mostly used in experimental teaching and handicraft production, and it is difficult to carry out large-scale practical application. There is an urgent need to add a multifunctional material as a raw material to make 3D printed products functional. Chitosan ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L75/04C08L5/08C08L91/06C08K5/098C08K5/58B29C48/92B33Y70/10
Inventor 肖荔人吴欣儒刘祯夏新曙陈庆华钱庆荣黄宝铨
Owner FUJIAN NORMAL UNIV
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