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Preparation, product and application of a biodegradable 3D printing gel

A 3D printing and biodegradable technology, applied in the preparation and application of 3D printing materials, can solve the problems of poor biodegradability, hindering wide application, time-consuming and energy-consuming, etc., and achieves not easy plastic deformation and good biocompatibility. , the effect of enhancing scalability

Active Publication Date: 2021-11-19
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biomaterials used in 3D printing have the following problems: synthetic materials with high mechanical strength have poor biodegradability, and some biomaterials from natural sources cannot meet the requirements of printing and mechanical properties during application
Synthetic materials such as polyurethane are not only time-consuming and energy-consuming to synthesize, but also degrade slowly, which hinders their wide application. Bio-derived hydrogels based on starch, alginate, etc. are cheap and degrade quickly, but in high-load conditions that do not provide adequate mechanical integrity

Method used

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  • Preparation, product and application of a biodegradable 3D printing gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a 3D printing gel with adjustable mechanical properties and biodegradability, the steps are as follows:

[0031] (1) Dissolve 1g of citric acid and 5g of glycerin in 8g of deionized water, and heat to 60°C to form a solution;

[0032] (2) Heat 7 g of glucose syrup to 60° C. to reduce its viscosity, and mix it with the solution obtained in (1).

[0033] (3) After the solution prepared in step (2) is cooled to room temperature, add 4 g of gelatin powder and mix well.

[0034] Print Example 1

[0035] The mixture obtained in Example 1 was heated in an oven at 70° C. for 1 h, stirred evenly, put into a printing tube, and centrifuged at 10,000 rpm for 10 min to remove air bubbles.

[0036] Set the printing parameters as follows: printing temperature 25°C, printing height 0.5mm, extrusion rate 30mm / s, nozzle diameter 0.5mm;

[0037] After entering the printing pattern in the printer, printing is started with the hydrogel.

Embodiment 2

[0039] Adopt substantially the same preparation method as in Example 1, except that 4 g of glycerin is dissolved in 8 g of deionized water in step (3).

Embodiment 3

[0041] Adopt substantially the same preparation method as in Example 1, except that 9 g of glycerol is added in step (3) and dissolved in 3 g of deionized water.

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Abstract

The present invention proposes the preparation of a biodegradable 3D printing gel, its product and its application. The preparation method includes operations: citric acid, glycerin and water are prepared as a solution, wherein the mass ratio of citric acid, glycerin and water is 1: (2-10): (2-10); mix the glucose syrup with the solution obtained in (1), the mass ratio of the glucose syrup to citric acid is (5-9): 1; add to step (2) Gelatin is added to the obtained solution, and the mass ratio of the gelatin to citric acid is (6-12):1. The preparation method of the 3D printing gel proposed by the present invention realizes the stable processing performance and processing conditions of the gel by adjusting the ratio of water and glycerin, that is, the adjustment of the mechanical strength; the addition of citric acid can adjust the pH environment of the gel, and at the same time It can inhibit the growth of microorganisms; all selected materials are food grade, environmentally friendly and easy to degrade.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to the preparation and application of a 3D printing material. Background technique [0002] 3D printing technology, also known as additive manufacturing, works by sequentially depositing material layer by layer to form three-dimensionally shaped objects. 3D printing technology has revealed new ways of producing parts, and the potential direction of this technology in the field of biological tissue engineering has now developed into an important tool for the production of biological constructs for regenerative purposes or as tissue models. Extrusion-based 3D printing is the most commonly used way to manufacture biological tissue models. Extrusion-type 3D printing facilities mainly include mechanical or pneumatic distribution systems, through which the nozzles (print heads) of the distribution system continuously and layer by layer deposit biomaterials onto t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L89/00C08K5/092C08K5/053C08K5/07B33Y70/10
CPCB33Y70/10C08J3/075C08J2389/00C08K5/053C08K5/07C08K5/092
Inventor 宋弋卢舒瑜马涛户昕娜胡小松
Owner CHINA AGRI UNIV
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