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Hollow silicon dioxide microsphere with different surface configurations and preparation method thereof

A technology of silicon dioxide and surface morphology, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of many restrictive conditions, difficult hollow microspheres with different surface smoothness, long reaction time, etc., to achieve simple control methods and control methods. Simple and easy to implement, the effect of short reaction process

Inactive Publication Date: 2010-05-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The current preparation method of hollow silica microspheres is difficult to prepare hollow microspheres with different surface smoothness in the same system
In addition, the existing preparation process of hollow silica microspheres has a long reaction time, many restrictive conditions, and is difficult to control.

Method used

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  • Hollow silicon dioxide microsphere with different surface configurations and preparation method thereof
  • Hollow silicon dioxide microsphere with different surface configurations and preparation method thereof
  • Hollow silicon dioxide microsphere with different surface configurations and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] according to figure 1 (5000 times SEM), hollow silica microspheres: diameter 1-3.5 μm, shell thickness 75nm, silica nanoparticles constituting the spherical shell are closely connected, and the surface of the microspheres is rough (5000 times).

[0035] Preparation method of hollow silica microspheres with high roughness:

[0036] 1) Take 4g polystyrene microspheres (PS) microspheres in a beaker, add 0.64mol methanol and 1.25molH 2 O middle;

[0037] 2) After stirring for 30 minutes, add 0.055mol / L cetyltrimethylammonium bromide (CTAB);

[0038] 3) After continuing to stir for 30 minutes, add 0.011mol tetraethyl orthosilicate (TEOS) and 11mol NH 3 ·H 2 O;

[0039] 4) Stirring and reacting for 1 hour; the silicon dioxide nanoparticles generated by hydrolysis of TEOS are connected and coated on the surface of polystyrene microspheres (PS) as templates;

[0040] 5) Suction filtration, washing until the clear liquid after suction filtration has no foam;

[0041] 6) Dry...

Embodiment 2

[0043] according to Figure 2a (5,000 times SEM), b (50,000 times SEM), hollow silica microspheres: diameter 1-3μm, shell thickness 67nm, specific surface area 461m2 / g, pore volume 0.3216ml / g, the carbon dioxide that constitutes the spherical shell There are nanopores in the silicon nanoparticles, the pore diameter is 2.24nm, and the surface roughness of the microspheres is relatively high.

[0044] Preparation method of hollow silica microspheres with higher surface roughness:

[0045] 1) Take 8g polystyrene microspheres (PS) microspheres in a beaker, add 0.64mol ethanol and 1.25molH 2 O middle;

[0046] 2) After stirring for 30 minutes, add 0.018mol / L cetyltrimethylammonium bromide (CTAB);

[0047] 3) After continuing to stir for 30 minutes, add 0.011mol tetraethyl orthosilicate (TEOS) and 0.22mol NH 3 ·H 2 O;

[0048] 4) Stir the reaction for 1 hour; the silica nanoparticles generated by hydrolysis of TEOS are connected and coated on the surface of polystyrene microsp...

Embodiment 3

[0052] According to the smooth surface hollow silica microspheres shown in Figure 3, the diameter is 500nm-3μm, and the shell thickness is 89nm. The spherical shell is composed of silica nanoparticles closely packed and connected, and there are nano Pore, pore diameter 2.3nm, specific surface area 1100m 2 / g, the pore volume is 0.7365ml / g, and the surface of the microsphere is smooth.

[0053] The preparation method of hollow silica microspheres with smooth surface:

[0054] 1) Take 6g polystyrene microspheres (PS) microspheres in a beaker, add 0.64mol ethanol and 1.25molH 2 O middle;

[0055] 2) After stirring for 30 minutes, add 0.055mol / L cetyltrimethylammonium bromide (CTAB);

[0056] 3) After continuing to stir for 30 minutes, add 0.011mol tetraethyl orthosilicate (TEOS) and 0.22mol NH 3 ·H 2 O;

[0057] 4) Stir the reaction for 1 hour; the silica nanoparticles generated by hydrolysis of TEOS are connected and coated on the surface of polystyrene microspheres (PS) a...

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Abstract

The invention relates to a hollow silicon dioxide microsphere with different surface configurations prepared in the same system and a preparation method thereof, belonging to the technical field of functional inorganic powdery materials. The hollow silicon dioxide microsphere with the different surface configurations has the diameter of 500 nm-4 mum and the shell thickness of 40-125 nm; a spherical shell is formed by packing and connecting silicon dioxide nano particles; gaps among the silicon dioxide nano particles forming the spherical shell range from 0 nm to 100 nm; and the silicon dioxide nano particles forming the spherical shell have nano micropores or mesopores, pore diameters range from 1.6 nm to 2.4 nm, specific surface areas range from 290 m2 / g to 1400 m2 / g, and pore volumes range from 0.24 ml / g to 1 ml / g. The invention also provides the preparation method of the hollow silicon dioxide microsphere with the different surface configurations. The regulation and control means of the surface configuration of the hollow silicon dioxide microsphere is simple and easy to operate; the reaction process for preparing the hollow silicon dioxide microsphere with a multi-stage pore path structure is short; and especially the control means is simple.

Description

technical field [0001] The invention belongs to the technical field of functional inorganic powder materials, and in particular relates to the preparation of hollow silica microspheres with different surface shapes in the same system and a preparation method thereof. Background technique [0002] Hollow microspheres are a type of spherical shell material with a size ranging from nanometers to several millimeters and a hollow interior. Compared with spherical materials of the same size, hollow microspheres have the obvious advantages of low density and material saving. In addition, the hollow structure inside the hollow microsphere may make it have unique mechanical, acoustic, optical and other properties. If holes penetrating the spherical shell are formed in the spherical shell layer, the guest molecules can also enter the interior of the hollow microspheres through these pores, and the hollow microspheres can therefore become hosts for the guest molecules. Hollow microsp...

Claims

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Application Information

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IPC IPC(8): C01B33/12C01B33/18
Inventor 刘世权魏美英
Owner UNIV OF JINAN
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