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Three-dimensional SiO2 ultra-thin membrane and preparation method and application thereof

An ultra-thin film, three-dimensional technology, applied in the three-dimensional SiO2 ultra-thin film and its application field, can solve the problems of unsatisfactory practical application, poor mechanical stability of macroporous materials, etc., and achieve production process conditions that are not harsh, easy for large-scale production, and stable high effect

Inactive Publication Date: 2013-01-09
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical stability of macroporous materials is often very poor, which cannot meet the practical application. This patent solves the problem of poor mechanical stability of macroporous materials through the introduction of thin shell structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Preparation of three-dimensional skeleton polymer, that is, epoxy resin and polyethylene glycol with a mass ratio of 1:2 are mixed and heated to 60°C, stirred for 10 minutes to form a transparent solution, and then quickly added with a mass ratio of epoxy resin of 1:6 polyamine liquid, stir evenly and pour it into a polytetrafluoroethylene mold for setting, keep the setting temperature at 60°C for 2 hours to form a white solid polymer blend, soak it in pure water for 5 hours and then completely The polyethylene glycol phase was removed, leaving an epoxy resin with a three-dimensional skeleton structure, which was naturally dried at room temperature for 3 days.

[0025] Step 2: 3D SiO 2 The preparation of the ultra-thin film is to soak the epoxy resin of the three-dimensional skeleton structure in step 1 in tetraethyl orthosilicate for 2 hours, and form SiO 2 / epoxy resin composite, dried for 2 hours to remove the generated ethanol and adsorbed ammonia water, ra...

Embodiment 2

[0029] Step 1: Preparation of three-dimensional skeleton polymer, that is, epoxy resin and polyethylene glycol with a mass ratio of 1:2 are mixed and heated to 60°C, stirred for 10 minutes to form a transparent solution, and then quickly added with a mass ratio of epoxy resin of 1:6 polyamine liquid, stir evenly and pour it into a polytetrafluoroethylene mold for setting, keep the setting temperature at 60°C for 2 hours to form a white solid polymer blend, soak it in pure water for 5 hours and then completely The polyethylene glycol phase was removed, leaving an epoxy resin with a three-dimensional skeleton structure, which was naturally dried at room temperature for 3 days.

[0030] Repeat the above steps once.

[0031] Step 2: 3D SiO 2 The preparation of the ultra-thin film is to soak the epoxy resin of the three-dimensional skeleton structure in step 1 in tetraethyl orthosilicate for 2 hours, and form SiO 2 / epoxy resin composite, dried for 2 hours to remove the generated...

Embodiment 3

[0035] Step 1: Preparation of three-dimensional skeleton polymer, that is, epoxy resin and polyethylene glycol with a mass ratio of 1:2.5 are mixed and heated to 80°C, stirred for 10 minutes to form a transparent solution, and then quickly added with a mass ratio of epoxy resin of 1:8 polyamine liquid, stir evenly and pour it into a polytetrafluoroethylene mold for setting, keep the setting temperature at 60°C for 2 hours to form a white solid polymer blend, soak it in pure water for 5 hours and then completely The polyethylene glycol phase was removed, leaving an epoxy resin with a three-dimensional skeleton structure, which was naturally dried at room temperature for 3 days.

[0036] Step 2: 3D SiO 2 The preparation of ultra-thin film, the epoxy resin of three-dimensional framework structure is about to soak 2 hours in tetraethyl orthosilicate / cyclohexylamine (mass ratio is 1: 1) in step 1, exposes in ammoniacal liquor atmosphere at 49 ℃ SiO formed after 15 hours 2 / epoxy ...

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Abstract

The invention relates to a three-dimensional SiO2 ultra-thin membrane and a preparation method and application thereof, which is characterized in that a polymer integrated type template in a three-dimensional skeleton structure is adopted, then the precursor silicate ester of SiO2 is hydrolyzed in situ in a pore canal of the template so as to make the SiO2 generated in the hydrolysis deposit on the surface of the polymer and form a three-dimensional continuous ultra-thin membrane, and then the polymer / SiO2 composite is calcined at high temperature to remove the polymer; and meanwhile, the SiO2 is sintered to be molded, and finally a target product is remained. The thickness of the three-dimensional SiO2 ultra-thin membrane is controllable between 15 and 90 nm, and the pore rate is 50 to 95 percent. The ultra-thin membrane can be used as a catalyst carrier, and can also be used for synthesizing novel three-dimensional ultra-thin membrane material, and the preparation method has mild condition and is suitable for mass production.

Description

technical field [0001] The patent of the present invention relates to macroporous inorganic material thin film and its preparation method and application field. Background technique [0002] SiO 2 Widely used as catalyst supports due to its remarkable structural and chemical stability, SiO 2 Ultra-thin films are a very useful platform on which researchers can perform a series of micro-treatments such as nanoparticle growth, chemical reactions, and induced structural changes. If the surface is immobilized with TiO 2 Finally, it can be used as a photocatalytic material with excellent performance, which is widely used in various fields such as food and medical treatment. [0003] Preparation of SiO 2 There are many methods for ultra-thin films, one is to directly expose single crystal silicon to oxygen, the other is to deposit silicon in an oxygen atmosphere or to oxidize a silicon layer on a metal base layer. The ultra-thin films prepared by these methods only have quasi-tw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 张瑞丰侯琳熙龙能兵张乐乐普佳音
Owner NINGBO UNIV
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