A kind of preparation method of non-spherical silicon dioxide particle

A silicon dioxide, non-spherical technology, applied in the direction of silicon dioxide, silicon oxide, etc., to achieve superior application value, mild preparation conditions, and unique shape effects

Active Publication Date: 2021-09-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, until now, the preparation of non-spherical silica particles with "sea urchin-like" or "bundle-like" morphology by sol-gel method has not been reported.

Method used

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  • A kind of preparation method of non-spherical silicon dioxide particle
  • A kind of preparation method of non-spherical silicon dioxide particle
  • A kind of preparation method of non-spherical silicon dioxide particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the 13.3mL ethanol system, add 6.6mL water, then add 1.0mL0.4mol / L tetrabutylammonium bromide solution and 1.5mL concentrated ammonia water (wt.25%, in the reaction system The final concentration is 1.0mol / L), after the reaction temperature is stabilized to 30°C, 0.4mL tetraethyl orthosilicate (final concentration in the reaction system is 0.09mol / L) is finally added, stirred for 8 hours, and centrifuged to remove The supernatant (4000rpm, 15min) was washed twice with water, and the particles were dried at 70°C to obtain "sea urchin-like" silica particles.

Embodiment 2

[0030] In 10.0mL ethanol system, add 10.0mL water, then add 1.0mL0.4mol / L tetramethylammonium bromide solution and 1.5mL concentrated ammonia water (wt.25%, in the reaction system The final concentration is 1.0mol / L), after the reaction temperature is stabilized to 30°C, 0.4mL tetraethyl orthosilicate (final concentration in the reaction system is 0.09mol / L) is finally added, stirred for 8 hours, and centrifuged to remove The supernatant (4000rpm, 15min) was washed twice with water, and the particles were dried at 70°C to obtain "bundle-like" silica particles.

Embodiment 3

[0032] Using an infrared characteristic spectrometer, the spherical silica particles prepared by the traditional sol-gel method, the "sea urchin shape" prepared in Example 1, and the "beam-shaped" silica particles prepared in Example 2 were respectively measured at 1500-700cm -1 The infrared characteristic spectrum of the region. As can be seen from the figure, compared with the spherical silica particles prepared by the traditional sol-gel method, the "sea urchin-like" and "beam-like" silica particles prepared by the present invention have a corresponding Si-O-Si characteristic peak. 1300-1000cm -1 In the region, different peak shapes are shown: compared with the infrared characteristic peaks of spherical silica particles, "sea urchin-like" silica particles and "beam-like" silica particles have broader shoulders, and, in Si- O-Si characteristic peak 1100cm -1 , the "sea urchin-like" silica particles and the "beam-like" silica particles all have red shifts in varying degrees...

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Abstract

A method for preparing non-spherical silicon dioxide particles of the invention belongs to the technical field of nano particle preparation. Using tetraethyl orthosilicate as the silicon source, ammonia water as the catalyst, and quaternary ammonium salts as the morphology regulator, the “sea urchin-like” or “beam-like” is prepared by the sol-gel method in the alcohol / water system. Silica particles. The preparation conditions of the invention are mild, the environment is friendly, and the prepared silicon dioxide particle has a unique shape and structure, and has very superior application value in the aspects of drug carrier, drug delivery, hard template agent and the like.

Description

Technical field: [0001] The invention belongs to the technical field of nanoparticle preparation, in particular to a non-spherical SiO 2 Particle preparation method. [0002] technical background: [0003] Due to its unique properties, silica particles have shown broad application prospects in the fields of industrial catalysis, chromatographic packing, bioimaging and drug release. Generally, only isotropic spherical silica particles can be prepared by the sol-gel method (J. Colloid Interface Sci. 1968, 26, 62-69). However, due to its high specific surface area and unique morphological structure, non-spherical silica particles show completely different application values ​​from spherical ones in the fields of adsorption, molecular recognition, templates, abrasive polishing, and medicine. Over the years, various methods have been developed to prepare non-spherical silica particles. For example, the Seung-Man Yang group used the microemulsion method to prepare clustered sili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18
CPCC01B33/18C01P2004/04C01P2004/30
Inventor 董贺韩延东胡洋郭子龙杨文胜
Owner JILIN UNIV
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