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Phosphate glass reinforced 3D printing wire and preparation method thereof

A phosphate glass, 3D printing technology, applied in the field of material science, can solve the problems of retained filament, poor applicability of phosphate glass fiber, and limited glass transition temperature of phosphate glass fiber, etc., to expand the variety range, good mechanical properties and absorbability of the human body, to achieve the effect of individualized precision treatment

Inactive Publication Date: 2020-12-01
NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this technology include: First, the upper limit of the mass fraction of phosphate glass powder / short fiber contained in the silk material is 15%, and the reinforcement content is relatively low, so the orthopedic implants made are limited in terms of mechanical properties. limitations
The disadvantage of this technology is that there is a restrictive requirement for the glass transition temperature of phosphate glass fibers (70-300°C), and for phosphate glass fibers used in orthopedic implants (glass transition temperature is usually 450°C-650°C). ℃) the applicability is not strong
At the same time, in this solution, a cooling water tank is used to cool and shape the extruded wire. This step may cause water vapor to intrude and stay inside the wire, forming bubble-type defects.

Method used

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  • Phosphate glass reinforced 3D printing wire and preparation method thereof
  • Phosphate glass reinforced 3D printing wire and preparation method thereof
  • Phosphate glass reinforced 3D printing wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Example 1. Phosphate glass short fiber (20%)-L-polylactic acid wire (filler-reinforced wire prepared by indirect method)

[0046] According to the mass ratio of 1:4, weigh 60g of phosphate glass fiber (the average length of the glass fiber is 120μm) and 240g of L-polylactic acid pellets (the average particle size is about 5.0mm), and then place them in a blast oven at 80°C or Dry in a vacuum oven for 3 hours.

[0047] Add the dried phosphate glass fiber and L-polylactic acid into the mixing chamber of the internal mixer preheated to 200°C, keep it warm for 10 minutes, and then stir it at a rotor speed of 20 rpm for 10 minutes to obtain a masterbatch.

[0048] Cool the masterbatch to room temperature, and then crush it into plastic particles <5mm in a plastic shredder.

[0049] The plastic pellets were fed into a desktop single-screw wire extruder, wherein the extruder preheating zone temperature was 205°C, the working zone temperature was 210°C, and the screw speed was...

example 2

[0050] Example 2. Phosphate glass short fiber (20%) filler-L-polylactic acid filament (filler-reinforced filament prepared by direct method)

[0051] According to the mass ratio of 1:4, weigh 60g of phosphate glass fiber (the average length of glass fiber is 120μm) and 240g of L-polylactic acid powder (average particle size is about 0.8mm), and then place them in a blast oven at 80°C or Dry in a vacuum oven for 3 hours.

[0052] The difference from Example 1 is that the dried phosphate glass fiber and L-polylactic acid powder are added to a mixer for mechanical stirring to obtain a powdery premix.

[0053] The premix was added to a desktop single-screw wire extruder, wherein the temperature of the preheating zone of the extruder was 205° C., the temperature of the working zone was 210° C., and the screw speed was 30 rpm. The molten premix is ​​extruded through a circular die with a diameter of 2.00mm / 3.00mm, and a 1000rpm fan is used to air-cool the extruded material to shape...

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Abstract

The invention provides a phosphate glass reinforced 3D printing wire. The phosphate glass reinforced 3D printing wire comprises 1-70% of phosphate glass and 30-99% of a polymer matrix. The invention also provides a preparation method of the wire containing different phosphate glass reinforcements. Compared with the prior art, the chemical components of the phosphate glass are defined more clearly;on the basis, the variety range of the phosphate glass suitable for the method is expanded; the content of the phosphate glass reinforcements is increased; furthermore, the filler content of the phosphate glass reinforcements can be more accurately controlled and blended with the help of a master batch / premix preparation mode; the prepared wire can be well compatible with a series of fused deposition modelling equipment; and the prepared composite material has good mechanical property and human absorbability, and is beneficial to realizing individualized accurate treatment of orthopedic diseases.

Description

technical field [0001] The invention relates to the field of material science, in particular to a 3D printing consumable of phosphate glass reinforced polymer and a preparation method thereof. Background technique [0002] Fractures and bone defects are common diseases in orthopedics. These diseases not only bring pain to patients, but also cause the bones to fail to perform their functions of bearing load and assisting movement, which brings great inconvenience to patients' lives. The most direct and effective treatment for orthopedic diseases is to implant medical devices with specific functions into the affected area. For example, through anatomical reduction-internal fixation surgery, a fracture internal fixation plate that can share the load of the bone and prevent displacement between the broken bones can be installed on the broken bone to treat the fracture; Bone tissue engineering scaffolds are used to fill bone defects, thereby guiding bone regeneration and repairi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/46A61L27/50C03C13/00B33Y70/10
CPCA61L27/46A61L27/50C03C13/00B33Y70/10A61L2430/02C08L67/04
Inventor 刘晓玲贺立喆朱晨凯从小晔
Owner NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD
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