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Method for preparing nanoscale silica hollow microspheres

A technology of silicon dioxide and hollow microspheres, applied in the directions of silicon dioxide, silicon oxide, nanotechnology, etc., can solve the problems of high cost and complicated preparation process, and achieve complete yield, simple operation, uniform size and shape Effect

Inactive Publication Date: 2009-10-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using silane or silica nanoparticles as silicon source is cost prohibitive and complicated to prepare

Method used

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  • Method for preparing nanoscale silica hollow microspheres
  • Method for preparing nanoscale silica hollow microspheres
  • Method for preparing nanoscale silica hollow microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a water bath environment at 70°C, 50ml of styrene, 5ml of methacrylic acid, and 450ml of distilled water were added to a 1000ml four-necked flask (the volume ratio of styrene to methacrylic acid was 10:1), mechanically stirred, and 10ml of 25g K of / L 2 S 2 o 8 Aqueous solution was added to initiate the reaction. After reacting for 24 hours, a styrene-methacrylic acid copolymerized microsphere emulsion was obtained. The emulsion is centrifuged and washed to obtain a styrene-methacrylic acid copolymer colloid template with a diameter of about 380 nm.

[0021] 5 g of the prepared template microspheres were added to 150 ml of distilled water, and ultrasonically dispersed for 20 minutes to obtain a stable dispersed suspension. The suspension was transferred to a large 1000ml beaker and placed in a water bath at 80°C. Then 5 ml of aqueous CTAB solution (50 g / L) was added and stirring was maintained for 1 hour.

[0022] 300 ml of sodium silicate solution (0.1 mol / L) ...

Embodiment 2

[0026] In a water bath environment at 70°C, add 50ml of styrene and 450ml of distilled water into a 1000ml four-neck flask, stir mechanically, and add 10ml of 20g / L K 2 S 2 o 8 Aqueous solution was added to initiate the reaction. After reacting for 12 hours, a pure polystyrene microsphere emulsion was obtained. The emulsion was centrifuged and washed to obtain a simple polystyrene colloid template with a diameter of about 650 nm.

[0027] 5 g of the prepared template microspheres were added to 150 ml of distilled water, and ultrasonically dispersed for 20 minutes to obtain a stable dispersed suspension. The suspension was transferred to a large 1000ml beaker and placed in a water bath at 80°C. Then 5 ml of aqueous CTAB solution (50 g / L) was added and stirring was maintained for 1 hour.

[0028] 600 ml of sodium silicate solution (0.1 mol / L) was added dropwise into the reaction liquid within 3 hours by using a constant flow pump, and the coating amount of silicon dioxide w...

Embodiment 3

[0033] In a water bath environment at 70°C, add 50ml of styrene, 5ml of methacrylic acid, and 450ml of distilled water into a 1000ml four-neck flask, mechanically stir, and add 10ml of 20g / L K 2 S 2 o 8 Aqueous solution was added to initiate the reaction. After reacting for 12 hours, a styrene-methacrylic acid copolymerized microsphere emulsion was obtained. The prepared styrene-methacrylic acid copolymerized microsphere emulsion is added to a 500ml beaker and placed in a water bath at 40°C, then 200ml of vitriol oil (98wt%) is added dropwise and kept stirring to obtain a sulfonated polystyrene Microspheres. The emulsion is centrifuged and washed to obtain a sulfonated polystyrene colloid template with a diameter of about 440 nm.

[0034] 5 g of the prepared sulfonated polystyrene template microspheres were added to 150 ml of distilled water, and ultrasonically dispersed for 20 minutes to obtain a stable dispersed suspension. The suspension was transferred to a large 1000...

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Abstract

The invention discloses a method for preparing nanoscale silica hollow microspheres, which uses sodium silicate solution and modified polymer respectively as the silicon source and template. Nanoscale silica hollow microspheres are prepared by a sacrificial template method by the following steps: (1) preparing polymer colloidal template microspheres; (2) preparing silicon dioxide-colloidal template complex microspheres; and (3) roasting the complex microspheres to obtain nanoscale silica hollow microspheres. Nanoscale silica hollow microspheres prepared by the invention have the characteristics of uniform size and appearance, fine integrity and high rate of productivity. The method can realize low cost and easy operation by using sodium silicate solution as the silicon source. Therefore, with easy operation and low cost, the method has certain instructing value for the industrialized production of silica hollow microspheres in the future.

Description

Technical field: [0001] The invention relates to a method for preparing nanometer silicon dioxide hollow microspheres, in particular to using a polymer as a template to prepare nanometer silicon dioxide hollow microspheres by a sacrificial template method. Background technique [0002] In recent years, various nanomaterials with special structures and special shapes have attracted widespread attention, one of which is hollow microsphere nanostructured materials. Since the spherical hollow material has the advantages of high surface permeability, high specific surface area, high mechanical stability and low density, and its hollow part can accommodate a large number of guest molecules or large-sized guests, some peculiar microscopic "packages" can be produced. The nature of the effect has great potential in scientific research and industrial technology applications. At present, hollow microspheres of different materials have been successfully prepared, such as: TiO 2 , ZnO,...

Claims

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Application Information

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IPC IPC(8): C01B33/18B82B3/00
Inventor 殷恒波葛晨张东芝薛金娟张运生卢章准陈维广姜廷顺沈玉堂江瑞生
Owner JIANGSU UNIV
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