Bio-based 3D printing material and preparation method thereof

A 3D printing, bio-based technology, applied in the field of biodegradable polymer materials, can solve the problems of low ester bond energy, easy to break, low polylactic acid crystallinity, etc., to increase added value, flexibility and heat resistance , Improve the effect of low heat distortion temperature

Active Publication Date: 2015-03-25
甘肃圣大方舟马铃薯变性淀粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bio-based 3D printing material to solve the problems that the existing 3D printing material polylactic acid has a small crystallinity, a small ester bond energy in the molecular chain, and is easy to break.

Method used

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  • Bio-based 3D printing material and preparation method thereof

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Embodiment 1

[0041] A bio-based 3D printing material and a preparation method thereof, comprising preparation of lactic acid, synthesis of polylactic acid, modification of polylactic acid, the specific steps are as follows:

[0042] (1) Preparation of lactic acid

[0043] Preparation of lactic acid by fermentation method: saccharification of corn by amylase, followed by microbial fermentation and conversion, to generate lactic acid; in this example, Bacillus was used as the starting strain, and lactic acid was prepared with abundant and cheap potato starch as the carbon source.

[0044] a. Strain preparation

[0045] Introduce Bacillus licheniformis (Baclicus lincheniformis) into the medium, keep the temperature in the incubator at 45°C, and ferment for 4 hours, then add calcium carbonate neutralizer to keep the pH of the culture solution at 7, and ferment for 15 hours.

[0046] The components of the culture medium are: hydrolyzed sugar 5%, bran 1%, neutralizer (calcium carbonate) 10g / L, ...

Embodiment 2

[0066] A bio-based 3D printing material and a preparation method thereof, comprising preparation of lactic acid, synthesis of polylactic acid, modification of polylactic acid, the specific steps are as follows:

[0067] (1) Preparation of lactic acid

[0068] Preparation of lactic acid by fermentation: use glucoamylase to saccharify wheat, and then carry out microbial fermentation transformation to generate lactic acid. In this example, Bacillus was used as the starting strain, and the abundant and cheap potato starch was used as the carbon source to prepare lactic acid.

[0069] a. Strain preparation

[0070] Insert Bacillus coagulans into the medium, keep the temperature in the incubator at 55°C, and after 6 hours of fermentation, add calcium carbonate neutralizer to keep the pH of the culture solution at 7.8, and ferment for 25 hours.

[0071] The above-mentioned culture medium components are: hydrolyzed sugar 25%, barley root 5%, neutralizer (calcium carbonate) 30g / L, am...

Embodiment 3

[0091] A bio-based 3D printing material and a preparation method thereof, comprising preparation of lactic acid, synthesis of polylactic acid, modification of polylactic acid, the specific steps are as follows:

[0092] (1) Preparation of lactic acid

[0093] Preparation of lactic acid by fermentation: use amylase to saccharify corn, and then carry out microbial fermentation transformation to generate lactic acid. In this example, the bacillus

[0094] Bacteria was used as the starting strain, and the abundant and cheap potato starch was used as the carbon source for the preparation of lactic acid.

[0095] a. Strain preparation

[0096] Insert Bacillus stearothermophilus into the culture medium, keep the temperature in the incubator at 50°C, and after 6 hours of fermentation, add calcium carbonate neutralizer to keep the pH of the culture medium at 7.4, and ferment for 20 hours.

[0097] The above-mentioned culture medium components are: hydrolyzed sugar 15%, bran 3%, neut...

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Abstract

The invention relates to a bio-based 3D printing material and a preparation method thereof, and aims to solve the problems that a conventional 3D printing material of polylactic acid is relatively small in crystallization degree, small in bond energy of ester bonds in molecule chains and has high probability of cracking. The bio-based 3D printing material is prepared from the following raw materials in percentage by weight: 20-40% of polyactic acid, 35-60% of thermoplastic starch, 3-10% of a toughening agent, 5-10% of a cross-linking agent, 5-13.4% of a filling agent, 0.5-2% of a thermal stabilizing agent, 1-3% of a lubricating agent and 0.1-5% of a preservative. The preparation method comprises the following steps: mixing polyactic acid with the thermoplastic starch, the toughening agent, the cross-linking agent, the filling agent, the thermal stabilizing agent, the lubricating agent and the preservative, pelleting and performing injection molding to obtain a modified polylactic acid. Due to adoption of the polyactic acid and the thermoplastic starch, the bio-based 3D printing material is good in compatibility, the elongation at break, the strength, the flexibility and the thermal resistance of the modified polyactic acid are all improved, and the additional value of a starch material is also increased.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polymer materials, and in particular relates to a bio-based 3D printing material. Background technique [0002] 3D printing technology is called rapid prototyping technology, also known as additive manufacturing technology. It is based on digital model files and uses powdered metal, plastic and other bondable materials to construct objects by layer-by-layer printing. Rapid Prototyping Technology. Compared with traditional manufacturing technology, 3D printing does not need to make molds in advance, remove a large amount of material during the manufacturing process, and get the final product without going through complicated forging processes. Therefore, structural optimization, material saving and save energy. 3D printing technology is suitable for new product development, rapid single-piece and small-batch parts manufacturing, complex-shaped parts manufacturing, mold design and manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L25/10C08L23/08C08L23/16C08L51/06C08K13/02C08K5/11C08K3/34C08K5/053C08K5/103C08K3/22C08K3/26C08K5/1515C08G63/08C12P7/56C12R1/10C12R1/07
Inventor 田映良崔芸曹余郑旺斌徐贵静
Owner 甘肃圣大方舟马铃薯变性淀粉有限公司
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