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3D printing chitosan material using ionic liquid as medium, and preparation method thereof

A technology of ionic liquid and printing shell, applied in the direction of additive processing, etc., can solve the problems of harmful impurities in organisms, inability to melt, difficult three-dimensional molding, etc., and achieve the effect of simple steps, easy application, and easy operation

Active Publication Date: 2019-10-15
INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the intramolecular and intermolecular hydrogen bond networks of chitosan, it cannot be melted and dissolved in water or most traditional organic solvents, which greatly restricts the three-dimensional molding and processing applications of chitosan.
At present, the common solvent system of chitosan is dilute acid or alkali, which is difficult to form three-dimensionally during processing, is easy to cause corrosion, and is easy to introduce harmful impurities to organisms.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Chitosan with a molecular weight of 200000Da is dissolved in the ionic liquid 1-ethyl-3-methylimidazole acetate (EMIMAc) at 110° C. under stirring at 650 rpm to obtain 0.1%-20% wt of chitosan- Ionic liquid printing materials.

[0018] (2) Put the chitosan-ionic liquid printing material into the printing cylinder and load it into the 3D printer.

[0019] (3) Set the 3D printing grid model, and perform 3D printing at room temperature in ethanol.

Embodiment 2

[0021] (1) Chitosan with molecular weight 200000Da is dissolved in ionic liquid 1-ethyl-3-methylimidazole acetate (EMIMAc) under stirring at 120°C at 600rpm to obtain 0.1%-20%wt chitosan- Ionic liquid printing materials.

[0022] (2) Put the chitosan-ionic liquid printing material into the printing cylinder and load it into the 3D printer.

[0023] (3) Set the 3D printing grid model, and perform 3D printing at 23°C in ethanol.

Embodiment 3

[0025] (1) Dissolving chitosan with a molecular weight of 200,000Da at 100°C and stirring at 800rpm into the ionic liquid 1-ethyl-3-methylimidazole acetate (EMIMAc) to obtain 0.1%-20%wt chitosan - Ionic liquid printing materials.

[0026] (2) Put the chitosan-ionic liquid printing material into the printing cylinder and load it into the 3D printer.

[0027] (3) Set 3D printing models with different spacing, and perform 3D printing at room temperature in medical alcohol.

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PUM

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Abstract

The present invention relates to a 3D printing chitosan material using an ionic liquid as a medium, and a preparation method and an application thereof. The medium comprises at least an ionic liquid,and the ionic liquid is at least one of 1-allyl-3-methylimidazolium bromide, 1-allyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium dimethylphosphate and 1-carboxymethyl-3-methylimidazolium chloride. The 3D printing chitosan material usingthe ionic liquid as the medium has the advantages of effective realization of the three-dimensional molding of the chitosan material, simple steps, simplicity in operation, and designing and preparation of a three-dimensional chitosan functional material with different forms as needed.

Description

technical field [0001] The invention relates to a 3D printing chitosan material using ionic liquid as a medium and a preparation method thereof. Background technique [0002] Based on the principle of three-dimensional design and layer-by-layer superposition, 3D printing technology is one of the fastest-growing and most applicable innovative technologies in recent years. It is both technological and practical, which can not only satisfy individual design but also produce products conveniently and quickly, so it is widely used in various fields such as military, aerospace, medicine, construction, and people's livelihood. Among them, bio-3D printing combined with biopolymer materials and active substances has important potential applications in the field of medical research, such as artificial tissues and artificial organs. [0003] Chitosan is modified from natural polymer chitin, which is a biopolymer second only to cellulose in nature. Because chitosan has the characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08J3/09B33Y70/00
CPCC08J3/096B33Y70/00C08J2305/08
Inventor 李博轩冷希岗王志红
Owner INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
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