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Preparation of Silica Hollow Spheres Using Sulfonated Polystyrene Microspheres as a Template

A technology of polystyrene microspheres and silicon dioxide, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of time-consuming and complicated preparation process, and achieve time-saving, simple and repeatable production process Effect

Inactive Publication Date: 2016-01-06
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above methods are relatively innovative, their preparation process is too cumbersome, and the preparation process takes a lot of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of polystyrene particles

[0025] Add 2g of distilled water and 1g of polyvinylpyrrolidone into 40g of ethanol respectively, stir evenly at room temperature, under the protection of nitrogen, add 7g of styrene and 0.1g of azobisisobutyronitrile into the above solution respectively, at 60°C, React for 20 hours, dry and grind at 40°C into powder to obtain polystyrene particles;

[0026] (2) Preparation of sulfonated polystyrene particles

[0027] Add 2g of polystyrene particles to 40g of 98% concentrated sulfuric acid, ultrasonically disperse for 10 minutes, react at 30°C for 3 hours, wash by centrifugation, dry and grind them into powder at 40°C to obtain sulfonated polystyrene particles;

[0028] (3) Preparation of sulfonated polystyrene / silica composite microspheres

[0029] Add 0.05g of sulfonated polystyrene particles to 75g of ethanol, mix well at room temperature, add 2.5g of ammonia water and 1.8g of tetraethyl orthosilicate to the above solution...

Embodiment 2

[0033] (1) Preparation of polystyrene particles

[0034] Add 4g of distilled water and 2g of polyvinylpyrrolidone to 80g of ethanol respectively, stir evenly at room temperature, under the protection of nitrogen, add 14g of styrene and 0.2g of azobisisobutyronitrile into the above solution respectively, at 70°C, React for 22 hours, dry and grind at 40°C into powder to obtain polystyrene particles;

[0035] (2) Preparation of sulfonated polystyrene particles

[0036] Add 3g of polystyrene particles to 60g of 98% concentrated sulfuric acid, ultrasonically disperse for 12 minutes, react at 40°C for 2 hours, centrifuge and wash, dry and grind them into powder at 40°C to obtain sulfonated polystyrene particles;

[0037] (3) Preparation of sulfonated polystyrene / silica composite microspheres

[0038] Add 0.06g of sulfonated polystyrene particles to 90g of ethanol, mix well at room temperature, add 3g of ammonia water and 2g of tetraethyl orthosilicate to the above solution, react ...

Embodiment 3

[0042] (1) Preparation of polystyrene particles

[0043] Add 6g of distilled water and 3g of polyvinylpyrrolidone into 120g of ethanol respectively, stir evenly at room temperature, under the protection of nitrogen, add 21g of styrene and 0.3g of azobisisobutyronitrile into the above solution respectively, at 80°C, React for 25 hours, dry and grind at 40°C into powder to obtain polystyrene particles;

[0044] (2) Preparation of sulfonated polystyrene particles

[0045] Add 4g of polystyrene particles to 80g of 98% concentrated sulfuric acid, ultrasonically disperse for 15 minutes, react at 50°C for 4 hours, centrifuge and wash, dry and grind them into powder at 40°C to obtain sulfonated polystyrene particles;

[0046] (3) Preparation of sulfonated polystyrene / silica composite microspheres

[0047] Add 0.07g of sulfonated polystyrene particles to 110g of ethanol, mix well at room temperature, add 3.5g of ammonia water and 2.5g of tetraethyl orthosilicate to the above solution...

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Abstract

The present invention uses sulfonated polystyrene microspheres as a template to prepare silica hollow spheres, and is characterized in that it comprises the following steps: (1) preparation of polystyrene particles; (2) preparation of sulfonated polystyrene microspheres Preparation; (3) Preparation of sulfonated polystyrene / silica composite microspheres; (4) Preparation of hollow silica microspheres. The process used in the method is simple and repeatable, and the prepared silica hollow spheres have good monodispersity and appearance.

Description

technical field [0001] The invention relates to the technical field of application of organic-inorganic composite materials, in particular to prepare silicon dioxide hollow spheres by using sulfonated polystyrene microspheres as templates. Background technique [0002] In recent years, with the potential application value of silica hollow spheres in the fields of catalysis, biological protection and chromatographic analysis, the preparation of silica hollow spheres has gradually become a hot spot in material research. [0003] Nowadays, heterogeneous polymerization methods, emulsion / interfacial polymerization methods, surface-activated polymerization methods, and self-assembly techniques have been used to prepare silica hollow spheres. Using the above method to prepare silica hollow spheres, it is necessary to repeatedly perform functional treatment and centrifugal water washing on the surface of the template particles, as well as continuous dissolution and dispersion. Calc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18
Inventor 刘伟良邵光伟周广盖何东新
Owner QILU UNIV OF TECH