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Preparation method of dental composite material

A technology of composite materials and reinforced composite materials, which is applied in the field of dental composite material preparation, can solve the problems of limited wide use, low mechanical properties, reaction shrinkage and conversion rate, etc., to achieve increased flexural modulus, improved fracture toughness, Effect of Bending Strength Improvement

Inactive Publication Date: 2016-04-27
SHAANXI YUHANG ELECTRONICS
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AI Technical Summary

Problems solved by technology

Resin-based dental materials have problems of low mechanical properties, reaction shrinkage and conversion rate, and service life, which limit their wide use

Method used

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Examples

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specific Embodiment

[0010] Specific embodiments: the preparation process of the present invention includes electrospinning to prepare PAN core-PMMA shell structure nanofibers and prepare nanofiber-reinforced composite materials in two steps;

[0011] The step of preparing PAN core-PMMA shell structure nanofibers by electrospinning is that 1.8g of PAN fibers and 0.69 g of polymethyl methacrylate (PMMA) particles are dissolved in 10 mL of N, N-dimethylformamide (DMF ) solvent, made into a solution, then mixed two solutions, magnetically stirred for 3h to obtain a mixed solution of PAN-PMMA for the preparation of PAN core-PMMA shell structure nanofibers, all solutions were prepared by traditional electrospinning nanofibers, The spinning process conditions are the same: the solution is placed in a 5mL injection syringe, the needle diameter is 0.4mm, the flow rate of the syringe pump is controlled at 0.4mL / h-1, the spinning voltage is 16kV, and the spun silk is received by a 10x15cm metal plate. The d...

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Abstract

The invention discloses a preparation method of a dental composite material, and belongs to the field of the preparation of a dental composite material. The invention provides a preparation method of a dental composite material with mechanical property improved. According to the method, nano-fibers, which are of shell (polymethyl methacrylate, PMMA)-core (polyacrylonitrile, PAN) structure, are prepared by virtue of a uniaxial blended electrostatic spinning process, and the nano-fibers are used for enhancing a dental light-cured resin substrate Bis-GMA (bisphenol A glycidyl methacrylate), so that the composite material is obtained. Compared with a pure resin system, the dental composite material prepared by the method improves bending strength by 18.7%, improves bending modulus by 14.1% and improves fracture toughness by 64.8%.

Description

technical field [0001] The invention belongs to the field of preparation of dental composite materials. Background technique [0002] The development of resin and polymer-based dental composites began in 1950-1960. Bowen and his collaborators synthesized the famous 2,2-bis[4-(2-methacryloyloxyethyl) in 1962 after long-term efforts. Oxygen)phenyl]propane, referred to as Bis-GMA. Although there have been numerous improvements and even replacement studies around the Bis-GMA system for more than 30 years, the most popular choices for resin matrices for commercial dental filling composites are BIS-GMA and UDMA. These two monomers are very viscous, so a second monomer is often added as a diluent to adjust the viscosity of the resin. A typical diluent is TEGDMA. This monomer can be initiated by free radical reactions in several ways. The reaction can be initiated by peroxides, amines, and light monitoring with a wavelength of 480nm. Visible light-induced reactions are the most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/087A61K6/083A61K6/891
CPCA61K6/887A61K6/891
Inventor 郝青
Owner SHAANXI YUHANG ELECTRONICS
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