Method for preparing silicon dioxide core-shell materials with core-shell spacing

A silicon dioxide, core-shell technology, applied in the direction of silicon dioxide, silicon oxide, etc., to achieve the effect of simple preparation method and cheap raw materials

Active Publication Date: 2015-10-07
中垦农芯(佛山)智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, few people have used the ARGET ATRP method on SiO 2 Surface grafting of hydrophobic butyl acrylate (BA) and hydrophilic polydimethylaminoethyl methacrylate (DMAEMA) to obtain amphiphilic polymer-modified SiO 2 -PBA-PDMAEMA, and use this as a template to hydrolyze tetraethyl orthosilicate (TEOS), then calcinate the polymer at high temperature to decompose, and prepare SiO 2 -SiO 2 As a core-shell material, TEOS is hydrolyzed through hydrogen bonding and amphiphilic polymer polyPBA-PDMAEMA, and amphiphilic polymer modified SiO is grafted by ARGET ATRP method 2 as a template to prepare SiO 2 -SiO 2 Core-shell materials have not been reported

Method used

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  • Method for preparing silicon dioxide core-shell materials with core-shell spacing
  • Method for preparing silicon dioxide core-shell materials with core-shell spacing
  • Method for preparing silicon dioxide core-shell materials with core-shell spacing

Examples

Experimental program
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Effect test

Embodiment example 1

[0049] Put a 250mL three-neck flask in an oil bath, add 6mL distilled water, 8mL ammonia water and 100mL absolute ethanol; add 4mL TEOS dropwise to the mixed solution under stirring, and stir at 40°C for 12h. After cooling, the obtained white precipitate solution was centrifuged, and the obtained precipitate was washed repeatedly with distilled water. Dry the obtained precipitate at 40 °C for 12 h to obtain SiO with a particle size of about 450 nm 2 nanospheres.

[0050] 1.0g of the above prepared SiO 2 Nanospheres, 25mL toluene in a 100mL three-necked flask and place the three-necked flask in an oil bath, stir evenly by magnetic force, add 3.0mL APTES dropwise to the flask, N 2 Under the conditions, stir and react at 95°C for 18h, centrifuge, wash and dry to obtain amino-modified SiO 2 -NH 2 .

[0051] Add 0.8g SiO to a 100mL three-neck flask 2 -NH 2 , 15mL toluene, 1mL triethylamine, ultrasonic 10min, put the flask in a low-temperature reaction bath, mix well, stir at...

Embodiment example 2

[0059] Put a 250mL three-neck flask in an oil bath, add 6mL distilled water, 8mL ammonia water and 100mL absolute ethanol; add 4mL TEOS dropwise to the mixed solution under stirring, and stir at 40°C for 12h. After cooling, the obtained white precipitate solution was centrifuged, and the obtained precipitate was washed repeatedly with distilled water. Dry the obtained precipitate at 40 °C for 12 h to obtain SiO with a particle size of about 450 nm 2 nanospheres.

[0060] 1.0g of the above prepared SiO 2 Nanospheres, 25mL toluene in a 100mL three-necked flask and place the three-necked flask in an oil bath, stir evenly by magnetic force, add 3.0mL APTES dropwise to the flask, N 2 Under the conditions, stir and react at 95°C for 18h, centrifuge, wash and dry to obtain amino-modified SiO 2 -NH 2 .

[0061] Add 0.4g SiO to a 100mL three-neck flask 2 -NH 2 , 15mL toluene, 1mL triethylamine, ultrasonic 10min, put the flask in a low-temperature reaction bath, mix well, stir at...

Embodiment example 3

[0069] Put a 250mL three-neck flask in an oil bath, add 6mL of distilled water, 8mL of ammonia water and 100mL of absolute ethanol; add 4mL of TEOS dropwise to the mixed solution with stirring, and stir at 40°C for 12h. After cooling, the obtained white precipitate solution was centrifuged, and the obtained precipitate was washed repeatedly with distilled water. Dry the obtained precipitate at 40 °C for 12 h to obtain SiO with a particle size of about 450 nm 2 nanospheres.

[0070] 1.0g of the above prepared SiO 2 Nanospheres, 25mL of toluene in a 100mL three-necked flask and place the three-necked flask in an oil bath, and after magnetically stirring evenly, add 3.0mL APTES dropwise to the flask, N 2 Under the conditions, stir and react at 95°C for 18h, centrifuge, wash and dry to obtain amino-modified SiO 2 -NH 2 .

[0071] Add 0.4g SiO to a 100mL three-neck flask 2 -NH 2 , 15mL toluene, 1mL triethylamine, ultrasonic 10min, put the flask in a low-temperature reaction ...

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Abstract

The invention discloses a method for preparing silicon dioxide core-shell materials with core-shell spacing. The method comprises the steps that an ARGET ARTP method is adopted to graft hydrophobic butyl acrylate (BA) and hydrophilic poly(N,N-dimethylaminoethyl methacryIate)(PDMAEMA) onto the surface of SiO2 to obtain amphiphilic polymer modified SiO2-PBA-PDMAEMA which is taken as a template to hydrolyze tetraethoxysilane (TEOS), high-temperature calcination is conducted on the polymer to make the polymer disintegrated, and SiO2-SiO2 core-shell materials with the core-shell spacing are prepared. The method for preparing the silicon dioxide core-shell materials with the core-shell spacing has the advantages that the thickness of the polymer layer PBA-PDMAEMA can be adjusted by adjusting addition quantity of the PDMAEMA, and the thickness of an SiO2 shell is further adjusted; a new idea is provided for preparing the core-shell SiO2 with the core-shell spacing.

Description

technical field [0001] The present invention relates to a method for preparing silicon dioxide (SiO2) with core-shell spacing 2 -SiO 2 ) The method for core-shell materials belongs to the technical field of material synthesis. Background technique [0002] In recent years, functionalized silica (SiO 2 ) have attracted extensive attention due to their potential applications in sensing, biomedicine, imaging, and drug delivery. SiO with a core-shell structure 2 Because of its large specific surface area, shell spacing and pore size, it is widely used in the fields of support, adsorption, separation and catalysis. SiO with traditional core-shell structure 2 Since there is no shell spacing, it faces a series of difficulties such as less adsorption and low catalytic activity. Therefore, the preparation of SiO with a core-shell structure 2 It has important research value and potential application prospect. Currently, SiO with a core-shell structure 2 become one of the chall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 周国伟任义仙陈兴芬李艳
Owner 中垦农芯(佛山)智能科技有限公司
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