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Preparation of graphene oxide and nanosized silica composite filler reinforced binder for dentistry

A nano-silica, composite filler technology, applied in the direction of dental preparations, dentistry, dental prosthesis, etc., to achieve the effect of improving bonding strength and good dispersibility

Active Publication Date: 2015-04-08
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application in dental adhesives has not been reported. Due to the strong hydrophilicity of graphene oxide, how to stably disperse it in adhesives rich in hydrophobic resins is the first problem to be solved.

Method used

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  • Preparation of graphene oxide and nanosized silica composite filler reinforced binder for dentistry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of graphene oxide and nano silicon oxide composites: prepare graphene oxide according to the Hummers method, prepare an aqueous solution with a concentration of 0.2 mg / ml graphene oxide, prepare nano silicon oxide according to the stober method, and perform APTES modification to obtain APTES modified nano Silicon oxide, and then prepare an aqueous solution of APTES-modified nano-silica with a concentration of 20mg / ml. The above two solutions are ultrasonically dispersed, and then the two solutions are stirred and mixed evenly according to the volume ratio of 1:1, and the precipitation is removed overnight. supernatant, and then the precipitate was freeze-dried for 48 hours to obtain graphene oxide and nano-silicon oxide composites, as attached figure 1 shown;

Embodiment 2

[0026] Surface modification of graphene oxide and nano-silicon oxide: Weigh 1g of graphene oxide and nano-silicon oxide compound and dissolve it in 200ml of water, stir first and then sonicate to disperse evenly, add 10ml HEMA, SPAN80 2g, potassium persulfate 0.05g in turn , toluene 100ml, stirring to form a microemulsion, feeding N in the reaction process 2 , reflux, and heated to 60 ° C for 3 hours, then centrifuged, vacuum-dried at room temperature, washed with ethanol and centrifuged three times to obtain pHEMA-modified graphene oxide and nano-silicon oxide composite materials;

Embodiment 3

[0028] According to the proportion of components: graphene oxide and nano-silica composite filler 2%, TEGDMA38%, BisGMA54%, HEMA3%, CQ0.5%, DMAEMA0.5%, 4-META2%, modify the pHEMA obtained in Example 2 The graphene oxide and nano-silicon oxide composite materials were added to TEGDMA, stirred magnetically at room temperature for 1 hour, and then used a cell disruptor to perform further ultrasonic treatment in an ice-water bath to disperse the composite filler in TEGDMA to obtain solution A; then Heat solution A to 60°C, add BisGMA, stir magnetically to obtain mixed solution B; cool mixed solution B to room temperature, add HEMA, CQ, DMAEMA, 4-META to solution B in turn, magnetically stir and then ultrasonically disperse to obtain graphite oxide Oxygen and nano-silica composite filler reinforced dental adhesive;

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Abstract

The invention provides a preparation method of a graphene oxide and nanosized silica composite filler reinforced binder for dentistry. The method comprises the following steps: preparing a graphene oxide and nanosized silica composite; performing surface modification for graphene oxide and nanosized silica; compositing graphene oxide and nanosized silica with the binder to obtain the binder for dentistry. The binder for dentistry is relatively high in binding strength; a graphene oxide and nanosized silica composite filler can be dispersed well in the binder; in addition, the modified composite filler is amphiphilic and can permeate dentin well while being applied to the binder for dentistry, so that the binding strength with the dentin is improved. The graphene oxide and nanosized silica composite filler produced in the preparation process can be applied to modification of other reins or macromolecules.

Description

technical field [0001] The invention relates to a dental adhesive, in particular to a method for preparing an adhesive reinforced by a nano filler. Background technique [0002] Dental adhesives are commonly used in dental restorations. After proper acid etching, the surface of the enamel can become rough and uneven, showing a special honeycomb structure. The adhesive easily penetrates into the enamel and forms after curing. The resin protrusions are micromechanically fitted into the enamel and thus have very good bonding properties. However, when the surface of the enamel has been completely destroyed and the adhesive can only bond with the dentin, the bonding effect is often unsatisfactory. This is because the surface of the dentin is a fluffy collagen fiber and the opening of the dentine tubule. If the collagen fiber is too dry, it will collapse. At the same time, there is small tubule fluid in the dentine tubule, so the surface of the dentine is a permanently wet surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/06C08K9/06C08K9/04C08K3/36C08K3/04C08L101/00
Inventor 何丹农周涓张彬严一楠朱君
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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