Preparation method of double-groups modified transparent meso pore silica gel monolith

A mesoporous silica, double-group technology, applied in silica, silica, chemical instruments and methods, etc., can solve the problem of single skeleton composition, achieve the effect of improving mechanical properties and expanding the scope of application

Inactive Publication Date: 2014-12-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention discloses a method for preparing a double-group modified transparent mesoporous silica gel monolith, in particular to a large-sized, crack-free, optically transparent mesoporous channel modified by two organic functional groups simultaneously The purpose of the preparation method of silica gel monolith is to improve the relatively single skeleton composition of existing transparent mesoporous silica gel monolith, and provide different guest molecules in double-group modified transparent mesoporous silica. The adjustment of the dispersion, migration and aggregation state inside the gel channel provides a variety of polar or non-polar micro-region environments, which in turn provides a new class of matrix materials for the development of new optical devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] Stir and mix 0.099 ml of methyltriethoxysilane, 0.058 ml of propyltriethoxysilane, 0.5 g of P123, 0.09 g of water and 0.1 ml of 1M hydrochloric acid at room temperature, and continue stirring for 30 minutes after the system is completely homogeneous. Then add 0.952 ml of tetraethyl orthosilicate, and continue to stir at room temperature for 30 minutes after the system is completely homogenized to obtain a homogeneous sol. Move the prepared sol into a container with a certain shape, seal it, and place it at a constant temperature at 60°C for static treatment. After 1 hour, the container was left open at 60°C for 5.75 hours to allow the system to gel. Then seal the container again and leave it to age at a constant temperature of 60°C for 1 day, and finally directly dry it in the open at 60°C. After 48 hours, a complete and transparent mesoporous bismuth with a container shape and simultaneous modification of methyl and propyl groups was obtained. Silica gel monolith.

Embodiment approach 2

[0021] Stir and mix 0.599 ml of methyltriethoxysilane, 0.058 ml of propyltriethoxysilane, 0.5 g of F127, 0.09 g of water and 0.1 ml of 1M hydrochloric acid at room temperature, and continue stirring for 30 minutes after the system is completely homogeneous. Then add 0.392 ml of tetraethyl orthosilicate, and continue to stir at room temperature for 30 minutes after the system is completely homogeneous to obtain a homogeneous sol. Move the prepared sol into a container with a certain shape and seal it, and then place it at a constant temperature at 60°C for static treatment After 1 hour, the container was left open at 60°C for 6.2 hours to gel the system. Then seal the container again and leave it to age at a constant temperature of 60°C for 1 day, and finally directly dry it in the open at 60°C. After 48 hours, a complete and transparent mesoporous bismuth with a container shape and simultaneous modification of methyl and propyl groups was obtained. Silica gel monolith.

Embodiment approach 3

[0023]0.099 ml of methyltriethoxysilane, 0.058 ml of propyltriethoxysilane, 0.5 g of Brij56, 0.09 g of water and 0.1 ml of 1M hydrochloric acid were stirred and mixed at room temperature, and the stirring was continued for 30 minutes after the system was completely homogeneous. Then add 0.952 ml tetraethyl orthosilicate, and continue to stir at room temperature for 30 minutes after the system is completely homogeneous to obtain a homogeneous sol. Move the prepared sol into a container with a certain shape and seal it, and then place it at a constant temperature at 60°C for static treatment. After 1 hour, the container was left open at 60°C for 4.8 hours to allow the system to gel. Then seal the container again and leave it to age at a constant temperature of 60°C for 1 day, and finally dry it in the open at 60°C. After 48 hours, a complete and transparent mesoporous bicarbonate modified with methyl and propyl groups was obtained. Silica gel monolith.

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PUM

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Abstract

The invention relates to a preparation method of double-groups modified transparent meso pore silica gel monolith, which belongs to the meso pore molecular sieve functional material technical field. The preparation method is characterized in that components distribution ratio and synthesis condition are controlled, in an acidic medium which takes a non-ionic surface active agent as a template, an inorganic silicon source and two modified silicon sources containing different functional groups are polymerized together to the transparent meso pore silica gel monolith of a pore canal modified by any two of alkyl group, aryl group, alkenyl group, alkylhalide group or sulfydryl group. The gel preparation method is simple, the product shape is regular, the size is controllable, the heat stability and transparency are good, Two modified groups are uniformly distributed in the meso pore silica gel pore canal, the concentration is adjustable, and the modified groups provide micro-area polar environment capable of selecting in a diversified mode for guest molecules, and have important value in development field of a new optical device. The double-groups modified transparent meso pore silica gel monolith obtained by extracting the solvent and removing a template has wide application prospect in the fields of catalysis, adsorption and separation.

Description

technical field [0001] The invention discloses a method for preparing a double-group modified transparent mesoporous silica gel monolith, which belongs to the technical field of mesoporous molecular sieve functional materials, and specifically relates to a large-sized pore channel modified by two organic functional groups , Crack-free, optically transparent mesoporous silica gel monolith. Background technique [0002] The transparent mesoporous gel monolith formed by surfactant as a template has high light transmittance, low external area, and its inherently ordered and adjustable pore structure can make dye molecules, photosensitive molecules, semiconductor particles Or conductive nanowires and other guest molecules can be intercalated at a higher concentration without mutual aggregation between molecules, so they have broad application prospects in the development of new optical devices. [0003] However, as the host material of transparent mesoporous gel monolith, its po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/16C01B37/00C01B39/00
Inventor 王晓钟陈伟韩灵翠谢克昌
Owner TAIYUAN UNIV OF TECH
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