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A kind of bioceramic slurry and preparation method thereof for high-performance dlp printing

A bioceramic, high-performance technology, applied in the field of high-performance DLP printing bioceramic slurry and its preparation, to achieve the effect of reducing degreasing cracking, high precision, and high solid phase content

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a bioceramic slurry for high-performance DLP printing and a preparation method thereof, in which the characteristics of the bioceramic slurry itself and the process characteristics of DLP printing are combined, and corresponding The research and design of the material composition of bioceramic slurry, in which, through the organic combination of premix, dispersant, release agent and bioceramic powder, the steric hindrance effect is used in the process of preparing bioceramic slurry, Thereby, a good dispersion effect can be formed between the powders. At the same time, the present invention effectively solves the problem that silicone oil as a release agent cannot be well compatible with resin solvents, and can reduce the binding force between the solidified layer and the release film. Further, the bioceramic slurry prepared by the present invention can reduce the internal stress of resin solidification during the forming process, reduce degreasing cracking, and improve the success rate in the degreasing process

Method used

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  • A kind of bioceramic slurry and preparation method thereof for high-performance dlp printing
  • A kind of bioceramic slurry and preparation method thereof for high-performance dlp printing
  • A kind of bioceramic slurry and preparation method thereof for high-performance dlp printing

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preparation example Construction

[0038] Such as figure 1 Shown, the preparation method of bioceramic slurry of the present invention comprises the following steps:

[0039] (1) After uniformly mixing the photocurable resin and polyethylene glycol in a preset ratio to form a premix solution, the premix solution includes polyethylene glycol and photocurable resin in a mass ratio of 3:20-2:5.

[0040] (2) Add a dispersant to the above premix, heat or not heat it to dissolve in the premix, stir evenly, and ultrasonicate for 5 minutes, the mass of the dispersant is 0.5% to 6% of the mass of the bioceramic powder .

[0041] (3) Dry the bioceramic powder, put it into an oven to remove moisture, if the bioceramic powder particle is too large, then ball mill it for 5 hours to 8 hours to obtain a micron-sized bioceramic powder, The average particle size of the bioceramic powder is between 0.2 μm and 40 μm.

[0042] (4) Weigh the micron-sized bioceramic powder and add it to the prepared solvent several times. The mas...

Embodiment example 1

[0046] This example uses β calcium phosphate powder and biological glass powder 45S5 composite powder, wherein β calcium phosphate and biological glass are mixed in a certain mass ratio, the particle size of β calcium phosphate powder is micron level, and the average particle size is 4.66 μm. The average particle size is about 6 μm. A total of 62 grams of bioceramic powder is selected, and the premix is ​​35 grams. The photocurable resin is selected from difunctional 1,6-hexanediol diacrylate monomer and difunctional tripropylene glycol diacrylate The acrylate monomers have a mass of 19 grams and 8 grams, respectively. Polyethylene glycol is selected polyethylene glycol 200, and quality is 8 grams. Among them, the quality of the hyperdispersant is 2.48 grams, the release agent is selected from acrylate modified silicone oil, and the quality is 0.62 grams, and the photoinitiator is selected from 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and the quality is 0.177 Gram, pol...

Embodiment 2

[0053] The composition and the content of each component of the premix of Example 2 are the same as Example 1, and the mass fraction of the bioceramics and the amount of the dispersant and the content of the polymerization inhibitor are different, and the differences are shown in Table 1 below:

[0054] Table 1:

[0055]

[0056] Such as image 3 and Figure 5 As shown, the average flexural strength of the bioceramics printed under this ratio reaches 24Mpa, and the accuracy is improved compared with Example 1, but the thickness of the cured layer is reduced, but it still has a good release effect.

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Abstract

The invention belongs to the technical field of photocurable additive manufacturing, and specifically discloses a bioceramic slurry used for high-performance DLP printing and a preparation method thereof. The bioceramic slurry comprises bioceramic powder, premixed solution, dispersant and release agent, wherein the mass ratio of the bioceramic powder to the premixed solution is 1: 7-7: 3, and thepremixed solution comprises polyethylene glycol and photocurable resin with a mass ratio of 3: 20-2: 5. The preparation method comprises the following steps of: uniformly mixing photocurable resin andpolyethylene glycol, adding dispersant into premixed solution for ultrasonic mixing uniformly, adding bioceramic powder into the mixed solution, and stirring uniformly, then adding release agent intothe bioceramic slurry initial body, and stirring uniformly, so as to prepare the bioceramic slurry. The bioceramic slurry prepared by the invention can facilitate the lifting of the green body and reduce the internal stress of resin curing in the forming process, reduce degreasing cracking, and improve the success rate in the printing and degreasing processes.

Description

technical field [0001] The invention belongs to the technical field of light-curing additive manufacturing, and more specifically relates to a bioceramic slurry for high-performance DLP printing and a preparation method thereof. Background technique [0002] Bone tissue engineering uses artificial biological scaffolds to treat bone defects that exceed the limit of bone healing. Bioceramic scaffolds are widely used as artificial scaffolds due to their similarity with the human body's own bone composition, good degradability, biocompatibility, and mechanical properties. Bone scaffolds, and a good bone scaffold needs to have a specific complex appearance structure and interpenetrating fine internal structure, which cannot be satisfied by traditional manufacturing techniques, and the digital light processing (DLP) printing technology uses light projection, layer by layer projection curing, has the ability to print The advantages of fast speed and high precision can effectively s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/447C04B35/622B33Y70/10
CPCB33Y70/00C04B35/447C04B35/622C04B2235/36C04B2235/5436C04B2235/6026C04B2235/96
Inventor 吴甲民化帅斌程立金苏瑾陈双史玉升刘洁闫春泽肖骏
Owner HUAZHONG UNIV OF SCI & TECH
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