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Alkaline solvent system chitosan for 3D printing and preparation method of alkaline solvent system chitosan

An alkaline solvent and 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of limited application and poor solubility, and achieve the effects of avoiding performance degradation, convenient preparation, and high forming precision

Inactive Publication Date: 2016-12-07
NORTHEAST FORESTRY UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, chitosan has strong hydrogen bonds between molecules, forming an ordered macromolecular structure, and its solubility is very poor, which limits its application in many aspects.

Method used

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  • Alkaline solvent system chitosan for 3D printing and preparation method of alkaline solvent system chitosan

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specific Embodiment approach 1

[0013] Embodiment 1: In this embodiment, chitosan, an alkaline solvent system, is used as a raw material for 3D printing, and the chitosan solution is solidified by heating with a laser beam to complete the manufacture of products with complex outer contours. Specifically, it is accomplished through the following steps:

[0014] Step 1: Complete the preparation of chitosan in the alkaline solvent system, disperse chitosan powder with a deacetylation degree of 40-80% and a molecular weight of 20-1 million in an alkaline solution, stir to make it fully swell, and then fully The swollen chitosan suspension is repeatedly frozen and thawed several times between -20-0° C. to obtain a stable chitosan solution, and the preparation of the alkaline solvent system chitosan is completed.

[0015] Step 2: Complete the establishment of the 3D printing model, use computer 3D modeling software (solidworks or UG, CAD, etc.) to carry out 3D modeling of the part model to be prepared, and use com...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment is different from Embodiment 1 in that: the alkaline solvent is made of NaOH, urea and water. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that: the content of NaOH in the alkaline solvent accounts for 4%-8% of the total weight of the alkaline solvent. Other steps and parameters are the same as those in Embodiments 1 to 2.

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Abstract

The invention provides alkaline solvent system chitosan in the field of 3D printing and a preparation method of the alkaline solvent system chitosan, and relates to a chitosan solution and a preparation method thereof. The alkaline solvent system chitosan is prepared through the following steps of dispersing chitosan powder of which the deacetylation degree is 40-80% and of which the molecular weight is 200 thousand-1 million into an alkaline solution, performing stirring so that the chitosan powder is sufficiently swollen, and repeatedly freezing and unfreezing the sufficiently-swollen chitosan suspension liquid for many times between minus 20-0 DEG C. The alkaline solvent system chitosan is used as a raw material, a corresponding model is established in a 3D printer, layering scanning is performed for determining a path, then in a laser beam heating manner, the chitosan solution is cured, and further products with complex outline shapes are manufactured. The alkaline solvent system chitosan prepared by the preparation method disclosed by the invention is stable in properties and free from toxins, and conforms to green manufacturing trend, and application of the chitosan in the industrial field is realized.

Description

technical field [0001] The invention relates to an alkaline solvent system chitosan used in the field of 3D printing and a preparation method thereof. Background technique [0002] The working principle of 3D printing technology is basically the same as that of ordinary printing. The printer is filled with "printing materials" such as liquid or powder. kind. Because it adopts a layer-by-layer superposition method in the forming principle, the processing technology is not affected by the complexity of the solid prototype, and it can realize the preparation of products with complex outer contour shapes. [0003] Chitosan is the only basic sugar natural polymer found in nature at present. Its output is second only to cellulose. The annual biosynthesis amount on the earth is nearly 100 billion tons, and its resources are extremely rich. [0004] Chitosan has good biocompatibility and biodegradability, and the degradation products are non-toxic to the human body. At present, it...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L5/08B29C67/00B33Y40/00B33Y10/00
Inventor 赵佳宁李健郭艳玲朱勋鹏
Owner NORTHEAST FORESTRY UNIVERSITY
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