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Preparation method of soft biological 3D printing material

A 3D printing and biological technology, applied in the field of 3D printing materials, can solve the problems of low resolution and precision of finished products, low bonding strength of finished products, severe brittleness of polylactic acid, etc., and achieve low raw material cost, good deformation recovery ability and practicality strong effect

Inactive Publication Date: 2019-05-21
赵延延
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in terms of actual use effect, 3D printing technology faces two important problems: one is the low bond strength of the finished product, and the other is the low resolution and precision of the finished product
In addition, due to the good biodegradability of polylactic acid, polylactic acid plastics can be used in 3D printing materials, but at this stage, the promotion and application of PLA as a general-purpose plastic, especially the base material of 3D printing consumables, is still subject to certain restrictions. , which is mainly due to the serious brittleness of polylactic acid, and the notched impact strength is less than 3KJ / m 2 , which seriously limits its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Put 10 parts of polypropylene, 7 parts of wollastonite, 3 parts of butyl rubber, 2 parts of acetyl triethyl citrate, 2 parts of calcium carbonate, and 1 part of triethanolamine into the high-speed ball mill, and the ball milling speed is 3000r / min, the ball milling time is 30min, the ball-to-material ratio is 99:2 for ball milling, and the obtained powder mixture is sieved and sorted, and the sieve aperture is 5000 mesh, and it is ready for use;

[0024] (2) Add the sieved powder of step (1) into a vacuum reactor, add 15 parts of polylactic acid, 4 parts of polyethylene wax, 2 parts of tetrahydrofuran, 1 part of azobisisobutyronitrile, and 2 parts of stearamide, After heating to 70-75°C, nitrogen is introduced to remove oxygen. The nitrogen pressure is 5Mpa, and then the temperature rises to 80-85°C again, and the reaction is kept for 6 hours.

[0025] (3) Add the reactants of step (2) into the vacuum filter, and the pressure of the vacuum filter is 5*10 -8 Pa, wa...

Embodiment 2

[0029] (1) Put 12 parts of polypropylene, 9 parts of wollastonite, 4 parts of butyl rubber, 3 parts of acetyl triethyl citrate, 4 parts of calcium carbonate, and 2 parts of triethanolamine into the high-speed ball mill, and the ball milling speed is 3000r / min, the ball milling time is 40min, the ball-to-material ratio is 99:2 for ball milling, and the obtained powder mixture is sieved and sorted, and the sieve aperture is 5000 mesh, and it is ready for use;

[0030] (2) Add the sieved powder of step (1) into a vacuum reactor, add 17 parts of polylactic acid, 5 parts of polyethylene wax, 3 parts of tetrahydrofuran, 2 parts of azobisisoheptanonitrile, and 2 parts of oleic acid amide, After heating to 70-75°C, nitrogen is introduced to remove oxygen. The nitrogen pressure is 5Mpa, and then the temperature is raised to 80-85°C again, and the heat preservation reaction is continued for 7 hours.

[0031] (3) Add the reactants of step (2) into the vacuum filter, and the pressure of ...

Embodiment 3

[0035] (1) Put 14 parts of polypropylene, 11 parts of wollastonite, 6 parts of butyl rubber, 4 parts of acetyl triethyl citrate, 5 parts of calcium carbonate, and 3 parts of triethanolamine into the high-speed ball mill, and the ball milling speed is 3000r / min, the ball milling time is 45min, the ball-to-material ratio is 99:2 for ball milling, and the obtained powder mixture is sieved and sorted, and the sieve aperture is 5000 mesh, and it is ready for use;

[0036] (2) Add the sieved powder of step (1) into a vacuum reactor, add 18 parts of polylactic acid, 8 parts of polyethylene wax, 4 parts of tetrahydrofuran, 2 parts of benzoyl peroxide, and 3 parts of erucamide, and heat After reaching 70-75°C, nitrogen gas is introduced to remove oxygen, the nitrogen pressure is 5Mpa, and then the temperature rises to 80-85°C again, and the reaction is continued for 9 hours. After the reaction, the pressure in the furnace returns to normal pressure, and the reactants cool down for late...

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PUM

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Abstract

The invention discloses a preparation method of a soft biological 3D printing material. The preparation method comprises the steps that polypropylene, wollastonite, butyl rubber, acetyl triethyl citrate, calcium carbonate, triethanolamine, polylactic acid, polyethylene wax, tetrahydrofuran and other raw materials are subjected to high-speed ball-milling, sieving separation, a vacuum nitrogen catalyzed reaction, vacuum filtration, repeated washing, drying, ultrasonic oscillation and dispersion, freezing, spray drying and the like respectively to prepare the soft biological 3D printing material.The prepared soft biological 3D printing material has the advantages of low raw material cost, high elasticity and good deformation restoration ability, and is suitable for various medical hoses, catheters, artificial blood vessels and the like.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a method for preparing soft biological 3D printing materials. Background technique [0002] 3D printing technology is one of the milestone modern digital automatic manufacturing technologies and the core technology of the "third industrial revolution". It has been widely used in biomedicine, industrial manufacturing, aerospace, automobile, construction and many other industries. But in terms of actual use effect, 3D printing technology faces two important problems: one is the low bonding strength of the finished product, and the other is the low resolution and precision of the finished product. In terms of research on 3D printing molding mechanism and development of high-performance 3D printing materials, China is still in its infancy, which is far behind the level of foreign countries. The reason is that 3D printing materials include powder materials and bonding so...

Claims

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Application Information

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IPC IPC(8): A61L29/02A61L29/04A61L29/06A61L29/14A61L27/02A61L27/16A61L27/18A61L27/50B33Y70/00
Inventor 赵延延侯林
Owner 赵延延
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