A 3D printed polycaprolactone/oyster shell powder composite material and its preparation and application and bone tissue engineering scaffold based thereon
A technology of bone tissue engineering and oyster shell powder, applied in medical science, prosthesis, etc., can solve the problems of lack of cell recognition sites, low immunogenicity, slow degradation rate, etc., to improve biological activity and osteogenesis effect , good biocompatibility, and short production cycle
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Embodiment 1
[0049] A kind of 3D printing technology to prepare polycaprolactone / oyster shell powder composite three-dimensional porous bone tissue engineering scaffold, comprising the following steps:
[0050] 1) Dry polycaprolactone (molecular weight: 60,000-80,000, melting point: 60-65° C.) and oyster shell powder in a drying oven at 40° C. for 24 hours, and set aside.
[0051] 2) Weigh 190g of polycaprolactone granules and 10g of oyster shell powder, mix them uniformly, add them into the feeding barrel of the twin-screw extruder, and feed them into the twin-screw extruder at a feeding speed of 40rpm / min to extrude Out, the parameters of the twin-screw extruder are set as follows: zone 1: 75°C, zone 2: 90°C, zone 3: 110°C, zone 4: 90°C, zone 5: 80°C, extrusion speed: 90rpm / min.
[0052] 3) The extruded spline is cooled and shaped by water cooling in the front section and air cooling in the back section, and the water temperature is room temperature.
[0053] 4) Granulate the above-ment...
Embodiment 2
[0058] A kind of 3D printing technology to prepare polycaprolactone / oyster shell powder composite three-dimensional porous bone tissue engineering scaffold, comprising the following steps:
[0059] 1) Dry polycaprolactone (molecular weight: 60,000-80,000, melting point: 60-65° C.) and oyster shell powder in a drying oven at 40° C. for 24 hours, and set aside.
[0060] 2) Weigh 160g of polycaprolactone granules and 40g of oyster shell powder, mix them uniformly, add them to the feeding barrel of the twin-screw extruder, and feed them into the twin-screw extruder at a feeding speed of 40rpm / min to extrude Out, the parameters of the twin-screw extruder are set as follows: zone 1: 75°C, zone 2: 90°C, zone 3: 110°C, zone 4: 90°C, zone 5: 80°C, extrusion speed: 90rpm / min.
[0061] 3) The extruded spline is cooled and shaped by water cooling in the front section and air cooling in the back section, and the water temperature is room temperature.
[0062] 4) Granulate the above-mentio...
Embodiment 3
[0067] A kind of 3D printing technology to prepare polycaprolactone / oyster shell powder composite three-dimensional porous bone tissue engineering scaffold, comprising the following steps:
[0068] 1) Dry polycaprolactone (molecular weight: 60,000-80,000, melting point: 60-65° C.) and oyster shell powder in a drying oven at 40° C. for 24 hours, and set aside.
[0069] 2) Weigh 170g of polycaprolactone granules and 30g of oyster shell powder, mix them uniformly, add them into the feeding barrel of the twin-screw extruder, and feed them into the twin-screw extruder at a feeding speed of 40rpm / min to extrude Out, the parameters of the twin-screw extruder are set as follows: zone 1: 75°C, zone 2: 90°C, zone 3: 110°C, zone 4: 90°C, zone 5: 80°C, extrusion speed: 90rpm / min.
[0070] 3) The extruded spline is cooled and shaped by water cooling in the front section and air cooling in the back section, and the water temperature is room temperature.
[0071] 4) Granulate the above-ment...
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