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Low-temperature FDM (Fused Deposition Modeling) biomedical degradable 3D (three-dimensionally) printing material, preparation and application

A biomedical and 3D printing technology, applied in the field of 3D printing, can solve the problems of limiting the popularization of low-temperature 3D printing materials, low melt strength, complicated operation, etc., and achieves the advantages of simple and easy preparation method, good printing performance and low preparation cost Effect

Inactive Publication Date: 2018-01-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a 3D printing material, pure PCL has problems such as slow solidification, low melt strength, and difficulty in molding. As a result, there is currently no PCL material that can be used for FDM 3D printing.
For example, the PCL / Hap composite material developed in Patent Publication No. CN106474566A "A 3D Printing PCL / Hap Composite Material and Its Preparation Method, Application, and Printing Method" has realized low-temperature 3D printing, but its material is slurry, which requires Only special 3D printers can be used, and the operation is complicated and difficult to implement, which greatly limits the promotion of low-temperature 3D printing materials

Method used

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  • Low-temperature FDM (Fused Deposition Modeling) biomedical degradable 3D (three-dimensionally) printing material, preparation and application
  • Low-temperature FDM (Fused Deposition Modeling) biomedical degradable 3D (three-dimensionally) printing material, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 80g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 5g of cornstarch, 5g of EBS, 5g of SiO 2 and 5 g of magnesium stearate. Use a mixer to mix it well.

[0028] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. Set the temperature of zone 1, zone 2, zone 3 and zone 4 of the twin-screw extruder to 50, 75, 100 and 75°C, respectively. Set the screw speed at 20 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0029] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80°C and 85°C respectively, the screw speed to 30rpm, and the wire size to 1.70-1.75mm.

[0030] When printing with an FDM 3D printer, set the 3D printer parameters as follows: nozzle temperature 85°C, bottom pl...

Embodiment 2

[0032] Weigh 82g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 8g of potato starch, 2g of EBS, 3g of SiO 2 and 5 g of magnesium stearate. Use a mixer to mix it well.

[0033] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. The temperatures of the first zone, the second zone, the third zone and the fourth zone of the twin-screw extruder were respectively set to 60, 75, 90 and 75°C. Set the screw speed at 20 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0034] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80°C and 85°C respectively, the screw speed to 30rpm, and the wire size to 1.70-1.75mm.

[0035] When printing with an FDM 3D printer, set the 3D printer parameters as fo...

Embodiment 3

[0037] Weigh 84g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 6g of soluble starch, 4g of EBS, 3g of SiO 2 and 3 g of magnesium stearate. Use a mixer to mix it well.

[0038] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. Set the temperature of zone 1, zone 2, zone 3 and zone 4 of the twin-screw extruder to 50, 70, 90 and 75°C, respectively. Set the screw speed at 15 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0039] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80°C and 85°C respectively, the screw speed to 40rpm, and the diameter of the wire to be 1.70-1.75mm.

[0040] When printing with an FDM 3D printer, set the 3D printer parameters as follows: nozzle temperature ...

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Abstract

The invention relates to a low-temperature FDM (Fused Deposition Modeling) biomedical degradable 3D (three-dimensionally) printing material, preparation and an application, which belong to the field of 3D printing. The material adopts PCL (polycaprolactone), starch (such as potato starch, corn starch or soluble starch), EBS (ethylene bis stearamide), SiO2 and magnesium stearate as materials. The preparation method includes the following steps: after the fillers, such as PCL master batch, starch, EBS, SiO2 and magnesium stearate, are melted and mixed by double screws according to a certain proportion, the mixture is ground, pelletized and extruded out by a single screw, stretched into a line with uniform and appropriate size, and an FDM 3D printer is then used for printing. The process of the invention is simple and easy to implement, the preparation cost is low, and the printing precision is high; moreover, the requirement on 3D printing equipment is low, the selectivity is wide, and an ordinary household FDM 3D printer can be used; furthermore, the material is degradable, a foundation is laid for the development of biomedical FDM 3D printing materials, and great value and significance in the field of 3D printing are achieved.

Description

technical field [0001] The invention belongs to the field of 3D printing, and in particular relates to the preparation of a biomedical degradable low-temperature FDM 3D printing material and its application printing conditions. Background technique [0002] Fused deposition modeling (FDM, Fused Deposition Modeling), this process is to extrude filamentous materials such as thermoplastics, wax or metal fuses from heated nozzles, and follow the predetermined trajectory of each layer of the part to fix the speed for melt deposition. Every time a layer is completed, the workbench is lowered by a layer thickness to superimpose and deposit a new layer, so that the deposition and molding of the parts are finally realized through repetition. The key to the FDM process is to keep the temperature of the semi-flow molding material just above the melting point (about 1°C higher than the melting point). FDM technology has the advantages of high material utilization rate, low material co...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08K5/20C08K3/36C08K5/098B33Y70/00
Inventor 徐福建杨济豪段顺
Owner BEIJING UNIV OF CHEM TECH
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