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Low over-cured calcium phosphate ceramic slurry for light curing molding and preparation method thereof

A technology of calcium phosphate ceramics and light-curing molding, which is applied in the direction of additive processing, etc., can solve the problems that hinder the application of ceramic 3D printing technology, cannot meet the field of bone implantation, and reduce the printing resolution, so as to ensure the vertical and horizontal resolution. , Scattering effect improvement, good vertical and horizontal resolution effect

Active Publication Date: 2019-10-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many constraints when this technology is used in the field of ceramic 3D printing. One of them is that due to the large refractive index difference between ceramic materials and light-cured resins, the ultraviolet light scattering caused by the printing resolution is greatly reduced, which cannot meet the requirements of fine internal structures. field of bone implants
[0003] Although domestic studies have been conducted on ceramic stereolithography materials, such as CN106747360A, CN106810215A, CN107129283A, CN105566860A, etc., they have not provided an effective solution to the scattering problem, which will hinder the application of ceramic 3D printing technology in the field of bone implants. application

Method used

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  • Low over-cured calcium phosphate ceramic slurry for light curing molding and preparation method thereof
  • Low over-cured calcium phosphate ceramic slurry for light curing molding and preparation method thereof
  • Low over-cured calcium phosphate ceramic slurry for light curing molding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare a high-energy planetary ball mill, add appropriate size zirconia balls, 14g of low-light curing monomer tricyclodecanyl dimethanol diacrylate and 6g of high refractive index light-curing monomer ethoxylate into the cleaned ball mill jar Hydroxylated bisphenol A di(meth)acrylate, 0.2g photoinitiator 2-hydroxy-2-methyl-phenylacetone-1, 0.8975g phosphate dispersant, 0.005g benzotriazole UV absorber agent, stir to mix and dissolve. Weigh 50g of β-tricalcium phosphate and 12g of biological glass powder in three times in a ball mill jar, each time weigh 15.95g of β-tricalcium phosphate and 4g of biological glass powder, and successively weigh them at 200r / min, 250r / min, 250 / min Each ball milled for 2 hours at a rotating speed of min. The desired slurry is obtained after ball milling. A single scanning line experiment (scanning speed 2m / s, power 450mw) shows that the curing depth and curing width of the slurry are respectively changed from the original 229.9μm and 47...

Embodiment 2

[0032] Prepare a high-energy planetary ball mill, and add an appropriate amount of zirconia balls, 14g of light-curing monomer 1,6-ethylene glycol diacrylate and 6g of high-refractive index light-curing monomer ethoxylated bisphenol into the ball mill jar A di(meth)acrylate, 0.2g photoinitiator 2-hydroxyl-2-methyl-p-hydroxyethyl ether base phenylacetone-1, 1.2g phosphoric ester dispersant, 0.0057g triazine UV absorber agent, stir to mix and dissolve. Weigh 48g of β-tricalcium phosphate and 12g of biological glass powder in three times in a ball mill jar, weigh 16g of β-tricalcium phosphate and 4g of biological glass powder each time, and successively weigh them at 200r / min, 200r / min, 250r / min Each ball milled for 1.5 hours at a rotating speed. After ball milling, a slurry that meets the requirements is obtained. A single scanning line experiment (scanning speed 2m / s, power 450mw) shows that the curing depth and curing width of the slurry are reduced to 147 μm and 263.5 μm (s...

Embodiment 3

[0034] Prepare a high-energy planetary ball mill, and add an appropriate amount of zirconia balls, 6g of photocurable monomer methoxypolyethylene glycol (350) monoacrylate and 14g of high refractive index photocurable monomer ethoxy Bisphenol A di(meth)acrylate, 0.2g photoinitiator 2-hydroxyl-2-methyl-phenylacetone-1, 1.05g polyacrylate, 0.0066g hindered amine UV absorber, stirring Let it mix to dissolve. Weigh 70 g of hydroxyapatite in three times into a ball mill jar, each time weigh 23.3 g of hydroxyapatite, and ball mill at 200 r / min, 250 r / min, and 250 r / min for 1 hour. After ball milling, a slurry that meets the requirements is obtained. A single scanning line experiment (scanning speed 2m / s, power 450mw) shows that the curing depth and curing width of the slurry are reduced to 202.9 μm and 66.3 μm (such as Figure 5 ), the degree of overcuring is greatly reduced.

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Abstract

The invention relates to a low over-cured calcium phosphate ceramic slurry for light curing molding and a preparation method thereof. The low over-cured calcium phosphate ceramic slurry for light curing molding mainly comprises the following components by mass percentage: 70-80wt% of ceramic powder, 0.5-2wt% of a dispersant, 10-25wt% of a light curable resin monomer and 0.05-0.5wt% of assistants.The preparation method mainly includes: conducting ball-milling and stirring on calcium phosphate ceramic powder, light curable resin, the dispersant, a photoinitiator and an ultraviolet absorber to obtain the slurry. The slurry has the characteristics of low viscosity, high solid content and low over-cured content, and can be used in the field of additive manufacturing of bioceramics.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of medical materials, and in particular relates to a low-overcured calcium phosphate ceramic slurry for photocuring molding and a preparation method thereof. Background technique [0002] 3D printing technology provides the possibility to solve the complex structure and personalization of bone implants. As one of the ceramic 3D printing technologies with the highest resolution of ceramic light curing technology, UV curing technology has attracted widespread attention. Different light source technologies can be divided into SLA (laser stereolithography) and DLP (surface projection stereolithography). Both technologies selectively cure photosensitive materials based on sliced ​​model data, and build parts layer by layer. However, there are many constraints when this technology is used in the field of ceramic 3D printing. One of them is that due to the large refractive index differenc...

Claims

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Application Information

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IPC IPC(8): C04B35/447C08F222/14C08F220/30C08F222/20C08F2/48C04B35/632C04B35/634C04B35/626B33Y70/00
CPCC04B35/447C08F222/10C08F222/30C08F2/48C04B35/632C04B35/63404C04B35/6261B33Y70/00C04B2235/36C04B2235/6026C08F220/301C08F220/302C08F222/102
Inventor 戴红莲黄孝龙马遇乐
Owner WUHAN UNIV OF TECH
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