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A high molecular weight chitosan material with controllable molecular weight suitable for 3D printing and its molding method

A high-molecular weight, 3D printing technology, applied in the field of 3D printing materials and their forming, can solve problems such as difficult to meet the mechanical strength of bone materials, and achieve the effect of shape control

Active Publication Date: 2016-02-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Using chitosan alone as a 3D printing material is generally difficult to meet the mechanical strength required by bone materials

Method used

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  • A high molecular weight chitosan material with controllable molecular weight suitable for 3D printing and its molding method
  • A high molecular weight chitosan material with controllable molecular weight suitable for 3D printing and its molding method
  • A high molecular weight chitosan material with controllable molecular weight suitable for 3D printing and its molding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method that the present invention applies:

[0039] 1. Add 25 parts by weight of 600KD chitosan finished product to 75 parts by weight so that the weight fraction is 1.3×10 -4 HCl solution. 25 parts by weight of chitosan solution were obtained after reflux and stirring degradation reaction in a constant temperature water bath at 50° C. for 6 hours.

[0040] 2. Add 0.1 part by weight of heat stabilizer to 25 parts by weight of chitosan solution, and dry in vacuum at 70° C. for 24 hours. To obtain chitosan powder.

[0041] The forming technique that the present invention applies:

[0042] Spread the chitosan powders with different molecular weights obtained in step 2 on the workbench of the laser sintering 3D printer FORMIGAP110 from EOS, Germany, and control the sintering temperature to 100 °C. The component model is made through computer CAD-aided design, and then the computer (equipped with Windows operating system) controls the 3D printer to scan t...

Embodiment 2

[0048] The preparation method that the present invention applies:

[0049] 1. Add 25 parts by weight of 600KD chitosan finished product to 75 parts by weight so that the weight fraction is 1.3×10 -4 HCl solution. 25 parts by weight of chitosan solution were obtained after reflux and stirring degradation reaction in a constant temperature water bath at 50° C. for 12 hours.

[0050] 2. Add 0.1 part by weight of heat stabilizer to 25 parts by weight of chitosan solution, and dry in vacuum at 70° C. for 24 hours. To obtain chitosan powder.

[0051] The forming technique that the present invention applies:

[0052] Spread the chitosan powders with different molecular weights obtained in step 2 on the workbench of the laser sintering 3D printer FORMIGAP110 from EOS, Germany, and control the sintering temperature to 100 °C. The component model is made through computer CAD-aided design, and then the computer (equipped with Windows operating system) controls the 3D printer to scan th...

Embodiment 3

[0057] Embodiment 3: As an optimization of the above embodiment, a porous composite material is made, the raw material includes a high molecular weight chitosan substrate, and the toughening agent includes carbon nanotubes, hydroxyapatite, and nano-calcium carbonate.

[0058] The specific preparation method is as follows:

[0059] 1. Add 25 parts by weight of 600KD chitosan finished product to 5 parts by weight of toughening agent (carbon nanotubes: hydroxyapatite: nano calcium carbonate = 2:4:4) and 70 parts by weight. The weight fraction is 1.3× 10 -4 HCl solution. A 25% chitosan solution was obtained after the degradation reaction was carried out under reflux and stirring in a constant temperature water bath at 50° C. for 12 hours.

[0060] 2. Add 0.1 parts by weight of heat stabilizer to the 25% chitosan solution prepared in step 1, and vacuum dry at 70° C. for 24 hours to obtain chitosan powder.

[0061] The forming technique that the present invention applies:

[006...

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Abstract

The invention discloses a molecular-weight-controllable high molecular weight chitosan-type material which is suitable for 3D printing and a molding method thereof. Raw materials of the chitosan-type material comprises, by weight, 20-25 parts of a chitosan finished product, 70-80 parts of an acid degradation solution and 0.1-0.5 parts of a thermal stabilizer. A selective laser sintering molding technology is employed as a 3D printing molding technology. A porous material, which is molded from the material and through the printing method, is controllable in molecular weight, is wide in pore size distribution, and has certain intensity and porosity. The whole method is very simple to operate.

Description

technical field [0001] The invention relates to a 3D printing material and a forming method thereof, in particular to a 3D printing high molecular weight chitosan material with controllable molecular weight and its derivatives. Background technique [0002] 3D printing is a popular term for additive manufacturing technology. Generally, it refers to using a digital model to simulate a three-dimensional entity, using powdered metal or plastic and other bondable materials, and controlling the printing nozzle through a computer, which can control the outline of the entity layer by layer. It does not require traditional tools, fixtures and multiple processing procedures, and uses 3D design data to automatically, quickly and accurately manufacture parts of any complex shape under program control on one device, thereby realizing digital "free manufacturing" of design and manufacturing . This technology can realize the forming of many complex structural parts that were difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08B29C67/04
Inventor 李志波王小实张树升夏爽盛力林学春马永梅孙文华徐坚董金勇李春成
Owner INST OF CHEM CHINESE ACAD OF SCI
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