Method for preparing nano-porous light silicon oxide microspheres

A lightweight silica and nanoporous technology, applied in the direction of silica, silicon oxide, nanotechnology, etc., can solve the problems of complex process and high cost, and achieve simple preparation process, low production cost and high yield Effect

Active Publication Date: 2015-04-29
泉州三欣新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of photocatalyst called pearlite microparticles made from special chemicals that absorb sunlight have several benefits compared to traditional methods such as absorption or reflection of visible rays. These improvements make it easier to use this technology on larger scales than previous options like those previously mentioned. Additionally, these tiny particles may also contain other useful substances (such as organic molecules) without being affected negatively affecting their effectiveness at producing certain products.

Problems solved by technology

This patents discuss different ways to make small ceramic (SiC) nanometer sized objects like hollow or foamed plates made up of tiny holes inside them. These structures allow fluids to pass freely while keeping their own weight intact. They may contain various substances such as metal oxides, organometals, carbon compounds, polymerizable monomers, oxygen carriers, nitrogen containing agents, etc., making these objects useful in industries ranging from electronic devices to advanced technologies.

Method used

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  • Method for preparing nano-porous light silicon oxide microspheres
  • Method for preparing nano-porous light silicon oxide microspheres
  • Method for preparing nano-porous light silicon oxide microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 100g of water glass (modulus 3.0) with 300g of deionized water at room temperature, add 50g of hydrochloric acid (37 wt%) and 300g of n-hexane, stir well to obtain a mixed solution; add 10g of Tween-20 to the mixed solution Surfactant, after stirring rapidly at 400rpm to make the system form an emulsion, add 10g of dimethyldiethoxysilane to it, stir and react at 30°C for 3h, after the reaction is over, let stand, filter, A white precipitate was obtained; the white precipitate was washed with n-hexane for 3 times, then placed in a blast drying oven, and dried at 100° C. for 6 hours to obtain white nanoporous light silica microspheres.

[0030] The scanning electron microscope image of the prepared nanoporous lightweight silica microspheres is shown in the attached figure 1 And attached figure 2 As shown, the particles are spherical, and the particle size distribution is between 10 and 20 μm. figure 2 It can be seen that the prepared nanoporous lightweight silica ...

Embodiment 2

[0037]Mix 100g of water glass (modulus 3.0) with 800g of deionized water at room temperature, add 120g of perchloric acid ((50 wt %) and 600g of n-heptane, and stir to obtain a mixed solution; add 1g of Tween-40 surfactant, after stirring rapidly at 1500rpm to make the system form an emulsion, add 90g of octamethylcyclotetrasiloxane to it, and stir and react at 60°C for 1.5h. After the reaction, Stand still and filter to obtain a white precipitate; wash the white precipitate 3 times with n-heptane, then place it in a blast drying oven, and dry it at 80°C for 3 hours to obtain a white nanoporous light silica microparticle. ball.

[0038] Test Results:

[0039] Particle size: 50~120μm;

[0040] Bulk density: 0.15g / cm3;

[0041] Specific surface area: 1000 m2 / g;

[0042] Average pore diameter: 80nm.

Embodiment 3

[0044] Mix 100g of water glass (modulus 3.2) with 600g of deionized water at room temperature, add 100g of hydrochloric acid (37 wt%) and 1200g of n-octane, and stir to obtain a mixed solution; add 20g of Tween- 60 surfactant, after the system forms an emulsion by rapid stirring at 800rpm, add 80g of dodecyltriethoxysilane to it, stir and react at 50°C for 1.5h, after the reaction is over, let it stand , filtered to obtain a white precipitate; the white precipitate was washed 3 times with n-octane, then placed in a blast drying oven, and dried at 180 ° C for 2 hours to obtain white nanoporous light silica microspheres.

[0045] Test Results:

[0046] Particle size: 1~20μm;

[0047] Bulk density: 0.05g / cm3;

[0048] Specific surface area: 1200 m2 / g;

[0049] Average pore diameter: 10nm.

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Abstract

The invention discloses a method for preparing nano-porous light silicon oxide microspheres. The nano-porous light silicon oxide microspheres are prepared by adding a surfactant to form an emulsion system and carrying out chemical reaction by mainly adopting water glass as a precursor, a solvent with a low surface tension as a replacement solvent and an organic silane compound as a hydrophobic modifier in the presence of inorganic acid as a catalyst. The method for preparing the nano-porous light silicon oxide microspheres is simple in process flow; in addition, the production raw materials are low in price, the solvent is easy to recover, and low production cost and high yield are achieved; in the preparation process adopted in the invention, no cation exchange resin is needed in the ion-exchange process, so that large-scale industrial production is facilitated; and the nano-porous light silicon oxide microspheres prepared by the method are of a typical nano-porous structure and can be applied to the fields, such as thermal insulation, chromatographic separation, catalysis and biological drug loading.

Description

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Claims

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Application Information

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Owner 泉州三欣新材料科技有限公司
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