Antibacterial silicon dioxide for toothpaste and preparation method thereof

A technology of silicon dioxide and toothpaste, applied in the direction of silicon dioxide, silicon oxide, medical preparations containing active ingredients, etc., can solve the problems of low loading rate, easy loss of silver and zinc ions, etc., and achieve high loading rate and toothpaste production. The effect of convenient and stable antibacterial properties

Active Publication Date: 2018-11-20
GUANGZHOU FEIXUE MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve technical problems such as the low loading rate of the existing silica / silver-zinc antibacterial agent composite material and the easy loss of silver-zinc ions, the invention provides a method for preparing silica for toothpaste with antibacterial properties. In the process of preparing precipitated silica, silver-zinc ions are added to make them evenly dispersed and tightly combined, and then a layer of shell is further wrapped around the inner core to ensure that the silver-zinc ions are not easily lost and released slowly during use. At the same time, the Silica also maintains good tooth friction cleaning performance, suitable for toothpaste

Method used

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  • Antibacterial silicon dioxide for toothpaste and preparation method thereof
  • Antibacterial silicon dioxide for toothpaste and preparation method thereof

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Embodiment 1

[0025] Embodiment 1, silicon dioxide for toothpaste with antibacterial properties of the present invention and its preparation

[0026] S1, adding 6m of sodium sulfate solution with a mass percentage concentration of 3% in the reaction tank 3 , then add sodium silicate solution 10m 3 and a concentration of 1.0mol / L zinc sulfate solution 2m 3 , heated up to 60°C, and stirred at a speed of 20Hz at 1.0m 3 Add sulfuric acid at a flow rate of / h, keep the reaction temperature at 60°C, add sulfuric acid dropwise until the pH value at the end of the reaction is 8.0, and obtain a silica / antibacterial agent composite inner core mixture;

[0027] S2. Heat up the silicon dioxide / antibacterial agent composite inner core mixture to 80°C, stir at a speed of 35Hz at 10m 3 Add sodium silicate solution 7m at a flow rate of / h 3 , while at 1.0m 3 Add sulfuric acid at a flow rate of / h and keep the reaction temperature at 80°C. After adding the sodium silicate solution, continue to add sulf...

Embodiment 2

[0029] Embodiment 2, silicon dioxide for toothpaste with antibacterial properties of the present invention and its preparation

[0030] S1, adding 8m of sodium sulfate solution with a mass percentage concentration of 6% in the reaction tank 3 , then add sodium silicate solution 11m 3 And concentration is 3.0mol / L silver nitrate solution 4m 3 , heated up to 70°C, and stirred at a speed of 30Hz at 2.0m 3 Add sulfuric acid at a flow rate of / h, keep the reaction temperature at 70°C, add sulfuric acid dropwise until the pH value at the end of the reaction is 9.0, and obtain a silica / antibacterial agent composite inner core mixture;

[0031] S2. Heat up the silicon dioxide / antibacterial agent composite inner core mixture to 90°C, stir at 40Hz at a speed of 14m 3 / h flow rate into sodium silicate solution 9m 3 , while at 2.0m 3Add sulfuric acid at a flow rate of / h and keep the reaction temperature at 90°C. After adding the sodium silicate solution, continue to add sulfuric aci...

Embodiment 3

[0033] Embodiment 3, silicon dioxide for toothpaste with antibacterial properties of the present invention and its preparation

[0034] S1, adding 7m of sodium sulfate solution with a mass percentage concentration of 4% in the reaction tank 3 , then add sodium silicate solution 10m 3 And the concentration is 2.0mol / L zinc sulfate solution 3m 3 , heated up to 65°C, and stirred at a speed of 25Hz at 1.5m 3 Add sulfuric acid at a flow rate of / h, keep the reaction temperature at 65°C, add sulfuric acid dropwise until the pH value at the end of the reaction is 8.5, and obtain a silica / antibacterial agent composite inner core mixture;

[0035] S2. Heat up the silicon dioxide / antibacterial agent composite inner core mixture to 85°C, stir at 35Hz at a speed of 12m 3 Add sodium silicate solution 8m at a flow rate of / h 3 , while at 1.5m 3 Add sulfuric acid at a flow rate of / h and keep the reaction temperature at 85°C. After adding the sodium silicate solution, continue to add su...

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Abstract

The invention belongs to the technical field of silicon dioxide, and particularly relates to an antibacterial silicon dioxide for toothpaste and a preparation method thereof. The preparation method comprises the steps of S1, adding a sodium sulfate solution into a reaction tank, then adding a sodium silicate solution and an inorganic antibacterial agent, heating to 60-70 DEG C, and adding sulfuricacid while stirring till the final pH value is 8.0 to 9.0 to obtain a kernel; S2, heating the kernel to 80-90 DEG C, adding the sodium silicate solution and sulfuric acid while stirring, continuouslydripping the sulfuric acid after the adding of the sodium silicate solution till the pH value is 3.0 to 5.0, ageing for 1 to 3 hours, then press-filtering, washing, drying and pulverizing to obtain the antibacterial silicon dioxide for toothpaste. The silicon dioxide has high silver and zinc ion loading rate, the inhibition against Escherichia coli and the like is over 98%, and the silver and zinc ions are unlikely to lose; and the silicon dioxide has a long-lasting effect and friction cleanness, and can be used as an abrasive and a preservative to be applied to toothpaste, so that the formulation of the toothpaste is simplified.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to silicon dioxide for toothpaste with antibacterial properties and a preparation method thereof. Background technique [0002] Abrasives account for a large proportion in the toothpaste formula. Abrasives can remove dirt on the surface of teeth. Good abrasives not only have the effect of cleaning teeth and removing plaque, but also cannot cause excessive wear and tear on teeth. Silica is a spherical porous structure without sharp edges and corners that will not wear teeth too much. It has stable physical and chemical properties, strong cleaning ability, good compatibility with toothpaste systems, and can be used for the preparation of transparent toothpaste. Has been widely used in the toothpaste industry. However, the rich and porous structure of silica also makes it easy for microorganisms to multiply due to factors such as improper storage methods and enviro...

Claims

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Application Information

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IPC IPC(8): C01B33/12A61K8/25A61K8/19A61K8/27A61Q11/00A61P1/02A61P31/02A61P31/04
CPCA61K8/19A61K8/25A61K8/27A61K2800/524A61P1/02A61P31/02A61P31/04A61Q11/00C01B33/12C01P2004/61C01P2006/19Y02A50/30
Inventor 侯灿明林英光胡非李丽峰张梦梅
Owner GUANGZHOU FEIXUE MATERIAL TECH
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