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Hollow glass microsphere prepared by soft template method and preparation method thereof

A technology of hollow glass microspheres and soft template method, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of low compressive strength, inability to form balls, high water permeability, etc., and achieve high ball forming rate, Good for forming balls and improving the hollow rate

Inactive Publication Date: 2010-09-22
南京龙驹科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Mesoporous hollow silica microspheres have been prepared by hydrolyzing mesoporous hollow silica microspheres under dilute acidic conditions using tetraethyl orthosilicate as the silicon source, and n-octylamine and other amines as templates. Calcined in a muffle furnace, but the gas decomposed by the template during the calcination makes the surface of the microbeads covered with mesopores, and the water permeability is very high after being dispersed in water. At the same time, the product has no glass transition, and the compressive strength is very low. Generally, it is often used as a drug carrier. application
Increase the calcination temperature to vitrify the microspheres, and all the silica microspheres in the molten state will melt into a large piece under static conditions and cannot be formed into balls.

Method used

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  • Hollow glass microsphere prepared by soft template method and preparation method thereof
  • Hollow glass microsphere prepared by soft template method and preparation method thereof
  • Hollow glass microsphere prepared by soft template method and preparation method thereof

Examples

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preparation example Construction

[0024] figure 1 It is a schematic diagram of the principle of preparing hollow glass microspheres according to the present invention. It can be seen from the figure that when n-octylamine and other n-octylamines are mixed with tetraethyl orthosilicate, microvesicles are first formed, and when the mixed solution containing ions is added to it, , (Earlier reports must add dilute acid solution to cause sol-gel reaction. In this example, it is found that replacing dilute acid with a small amount of ionic compound can not only make the reaction happen quickly, but also add other elements to the product) orthosilicic acid Ethyl ester rapidly undergoes a sol-gel reaction on the surface of the vesicles to form a layer of borosilicate compound with uniform thickness. The spherical shell of the microbeads has not undergone glass transition and has very low strength, so the stirring time should not be too long to avoid breaking. Then add the thick hollow microspheres from the top of the ...

example 1

[0026] Example 1: Mix 100ml of tetraethyl orthosilicate, 15ml of n-nonylamine and 10ml of n-decylamine, stir for 4 minutes and set aside, while fully dissolving 1.0g of sodium chloride, 0.5g of calcium chloride and 8g of borax in water at 80°C Then quickly pour the above mixed solution, stir at a constant speed, the stirring rate is 100 rpm, and the stirring time is 5 minutes. After the stirring is stopped, the product is filtered and dried to obtain the hollow borosilicate microbeads containing the soft template. The beads are added to a high-temperature vertical glass bead molding furnace at a temperature of 1100°C (manufactured by Wuhan Yahua Electric Furnace Co., Ltd., model: KY-30-6) for refining, and the hollow glass beads with spherical shells in a molten state are directly introduced into the circulation system. Quenched in the water tank of cooling water, the density is less than 1g / cm 3 The hollow glass microspheres float on the water, and the floating beads are coll...

example 2

[0027] Example 2: Mix 100ml tetraethyl orthosilicate and 25ml n-octylamine, stir for 3 minutes and set aside, at the same time fully dissolve 2.5g potassium chloride and 10.0g borax in water at 80°C and quickly pour into the above mixture at a constant speed Stirring, the stirring rate is 800 rpm, and the stirring time is 10 minutes. After the stirring is stopped, the product is filtered and dried to obtain hollow borosilicate microbeads containing soft templates. The hollow microbeads are added to a refining furnace at a temperature of 1500 ° C. Refined, hollow glass microspheres with spherical shells in a molten state are directly introduced into a water tank with circulating cooling water for quenching, and the density is less than 1g / cm 3The hollow glass microspheres float on the water, and the floating beads are collected through a filter screen and dried at a constant temperature (80°C) to obtain the finished product. The bulk density is 0.54g / cm 3 .

[0028] image 3...

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Abstract

The invention relates to a hollow glass microsphere prepared by a soft template method and a preparation method thereof. The hollow glass microsphere comprises the following raw materials in parts by weight: 93 parts of tetraethoxysilane, 11-35 parts of n-amine, 1.5-3.5 parts of inorganic ionic salt and 8-20 parts of borax, wherein, the n-amine is at least one of n-octylamine, n-nonyl amine or n-decylamine; and the inorganic ionic salt is at least one of sodium chloride, potassium chloride, calcium chloride, sodium sulfate, sodium carbonate and potassium carbonate. The balling rate of the hollow glass microsphere exceeds 99% and the hollow rate thereof exceeds 99%; the hollow glass microsphere has uniform structure, and the particle size thereof can be self-regulated and controlled into 10-400mum as needed; the corresponding stacking density is 0.60-0.15g / cm<3>; and the hollow glass microsphere can be widely applied to fields such as automobile, building materials, heat insulation, sound insulation, deep-sea drilling, aerospace and the like.

Description

technical field [0001] The invention relates to the preparation of inorganic hollow materials, in particular to a hollow glass microsphere prepared by a soft template method and a preparation method thereof. Background of the invention [0002] Hollow glass microspheres, known as "space age materials", are a new type of spherical, hollow, and gas-containing new multifunctional fine glass body. A series of characteristics such as good insulation, low density, good fluidity, small shrinkage, strong stability, heat insulation, sound insulation, high temperature resistance, thermal conductivity and thermal shrinkage coefficient make it a good filling and reforming material. It is a permanent material, which greatly reduces the cost of the filled product and at the same time endows the filled product with multiple functions, so it is widely used in aerospace, deep sea drilling, automobiles, construction, electrical insulation materials, heat insulation, sound insulation and Mili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03B19/10
Inventor 许鑫华吴湘锋路会冉李军伟
Owner 南京龙驹科技实业有限公司
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