Preparation process of biodegradable PCL (polycaprolactone)/Mg composite material FDM (fused deposition modeling) consumable

A composite material and biodegradable technology, which is applied in the field of preparation technology of biodegradable PCL/Mg composite FDM consumables, can solve problems such as limited application and difficulty in providing mechanical support, so as to improve secondary surgery, facilitate attachment and increase value. , the effect of enhancing the ability of proliferation and differentiation

Inactive Publication Date: 2018-08-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong degradability of Mg metal, it can only exist in the human body for a short time, and then it will quickly dissolve in the human body. It is difficult to provide sufficient mechanical support in bone healing, which greatly limits its application in the biological field. application

Method used

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  • Preparation process of biodegradable PCL (polycaprolactone)/Mg composite material FDM (fused deposition modeling) consumable
  • Preparation process of biodegradable PCL (polycaprolactone)/Mg composite material FDM (fused deposition modeling) consumable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation process for biodegradable PCL / Mg composite material FDM consumables, the raw material Mg and PCL are mixed and granulated by a solution method to obtain biodegradable PCL / Mg composite material FDM consumables, and Mg in the raw material accounts for 50% of the PCL mass, Solution mixing granulation, including the following steps:

[0031] 1) Dissolve PCL in N,N-dimethylacetamide (DMA), the mass of both N,N-dimethylacetamide (DMA) and PCL is 100g, heat in a water bath, the heating temperature is 80°C, and the heating time is 30min;

[0032] 2) Dissolving 50g Mg powder in 50g DMA, magnetic stirring to form a suspension, the magnetic stirring time is 30min, and the magnetic stirring speed is 600rpm;

[0033] 3) pour the suspension formed in step 2) into the solution of step 1), pour the solution into the tin foil box after magnetic stirring, the magnetic stirring time is more than 60min, and the rotating speed is 600rpm;

[0034] 4) Put the tin carton soluti...

Embodiment 2

[0039] A preparation process of biodegradable PCL / Mg composite material FDM consumables, the raw material Mg and PCL are mixed and granulated by a parallel twin-screw extruder to obtain biodegradable PCL / Mg composite material FDM consumables, and Mg in the raw materials accounts for the mass of PCL. 30% of;

[0040] It specifically includes the following steps: take 200g of PCL and 60g of Mg and put them into the hopper of a parallel twin-screw extruder, the screw length-diameter ratio of the parallel twin-screw extruder is 20:1, the extrusion temperature is 80°C, and the extrusion process After the pellets are put into the hopper, the operation is repeated several times until the Mg is uniformly dispersed in the PCL substrate.

Embodiment 3

[0042] A preparation process for biodegradable PCL / Mg composite material FDM consumables. The raw material Mg and PCL are directly mixed and extruded through a single screw extruder to obtain biodegradable PCL / Mg composite material FDM consumables. 5% of PCL mass;

[0043] Specifically include the following steps: take 20g of PCL and 1g of Mg into the hopper of the single-screw extruder, set the temperature of the extrusion section to 70 °C, and set the temperature of the mixing section to 80 °C; Then put it into the hopper and repeat the operation several times until the Mg is uniformly dispersed in the PCL substrate.

[0044] refer to figure 1 , figure 1 It is the trend diagram of the change of bone volume with time after adding different mass fractions of Mg to the PCL of Example 1, Example 2 and Example 3, from figure 1 It can be seen that the addition of Mg with different mass fractions in PCL has a higher degree of increase in bone volume than pure PCL, and 30% mass f...

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Abstract

The invention discloses a preparation process of a biodegradable PCL (polycaprolactone)/Mg composite material FDM (fused deposition modeling) consumable. The preparation process comprises the following steps: mixing raw materials Mg and PCL for granulation through a parallel double-screw extruder, directly performing mixing, extrusion and granulation through a single-screw extruder or performing mixing and granulation with a solution method, thus obtaining the biodegradable PCL/Mg composite material FDM consumable. The Mg in the raw materials accounts for 5 to 50 percent of the mass of the PCL. The prepared biodegradable PCL/Mg composite material FDM consumable has the advantages that the degradation time in a human body is controllable, and the bone repair effect is better than that of pure PCL.

Description

technical field [0001] The invention relates to the technical field of FDM consumables, in particular to a preparation process of a biodegradable PCL / Mg composite material FDM consumable. Background technique [0002] The raw material used in Fused Deposition Modeling (FDM) is a filamentary hot-melt material, which is quantitatively fed into a heating nozzle with a fine nozzle by a wire feeding mechanism (friction wheel or screw), and the wire is heated to After the molten state is extruded from the nozzle, the hot-melt material is extruded and accumulated with the nozzle according to the specified trajectory, and is bonded and solidified with the previous layer of material. After the accumulation of one layer is completed, the worktable will drop one layer thickness according to the layering information, and the forming direction will be changed. Continue shaping until the entire part has been deposited. The FDM process can adjust its processing methods according to the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29C47/92B33Y70/00C08L67/04C08K3/08C08K3/22A61L27/44A61L27/50A61L27/58B29C48/92
Inventor 刘亚雄刘永财伍言龙
Owner XI AN JIAOTONG UNIV
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