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Graphite/aluminum oxide asymmetric membrane and preparation method thereof

An asymmetric membrane and alumina technology, applied in the bionic field of biological ion channels, can solve the problems of single and unadjustable components, high cost, complicated process, etc., and achieve the effect of simple structure, low cost and simple process

Inactive Publication Date: 2020-12-18
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned preparation methods all involve a multi-step preparation process, the process is relatively complicated and costly, and the composition in the preparation process is single and cannot be adjusted. Therefore, it is important to seek bionic nanochannels with simple preparation methods, low cost and adjustable composition significance

Method used

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  • Graphite/aluminum oxide asymmetric membrane and preparation method thereof
  • Graphite/aluminum oxide asymmetric membrane and preparation method thereof
  • Graphite/aluminum oxide asymmetric membrane and preparation method thereof

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preparation example Construction

[0033] [Preparation method of graphite / alumina asymmetric film]

[0034] The preparation method of graphite / alumina asymmetric film of the present invention comprises the following steps:

[0035] Graphite gel preparation process: using anhydrous methanol as a solvent, adding methyltrimethoxysilane and concentrated hydrochloric acid for hydrolysis, adding graphite powder and stirring at the same time to obtain a graphite-containing gel.

[0036] In the aforementioned graphite gel preparation process, anhydrous methanol is used as a solvent. Anhydrous methanol as a solvent may have a purity of, for example, 99.5% or more.

[0037]Methyltrimethoxysilane and concentrated hydrochloric acid are hydrolyzed in anhydrous methanol, and the reaction formula of hydrolysis is:

[0038] n CH 3 Si(OCH 3 ) 3 +2n H 2 O→(-CH 3 Si(OH) 3 -) n +3n CH 3 Oh

[0039] The concentration of concentrated hydrochloric acid is 12 mol / L, and the mass ratio of methyltrimethoxysilane to concentrat...

Embodiment 1

[0056] Take 18 mL of anhydrous methanol as a solvent, add 2 mL of methyltrimethoxysilane, and then add 0.1 mL of 12 mol / L concentrated hydrochloric acid for hydrolysis, add 4 g of graphite powder at the same time of hydrolysis, and stir for 2 hours to obtain a gel containing graphite. The graphite gel obtained above was coated on one side of the surface of porous alumina prepared by Puyuan Nano Technology Co., Ltd., with a pore size of 40-70 nm and a thickness of about 100 μm. After heating and drying at 55 ° C for 24 hours, a graphite / alumina non-alumina composite was obtained. Symmetric Membrane 1.

[0057] figure 2 Shown is the surface environmental scanning electron microscope picture of the graphite / alumina asymmetric film obtained in embodiment 1, figure 1 , figure 2 They are the scanning electron micrographs of the graphite layer surface and the cross-sectional scanning electron micrographs of the graphite / alumina asymmetric film obtained in Example 1, respectively....

Embodiment 2

[0060] Take 18mL of anhydrous methanol as a solvent, add 2mL of methyltrimethoxysilane, and then add 0.1mL of 12mol / L concentrated hydrochloric acid for hydrolysis, add 8g of graphite powder at the same time of hydrolysis, and stir for 2 hours to obtain a gel containing graphite. The graphite gel obtained above was coated on one side of the surface of porous alumina prepared by Puyuan Nano Technology Co., Ltd., with a pore size of 40-70 nm and a thickness of about 100 μm. After heating and drying at 55 ° C for 24 hours, a graphite / alumina non-alumina composite was obtained. Symmetric membrane2. Ionic rectification ratio I +2V / I -2V 6.0

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Abstract

The invention relates to a graphite / aluminum oxide asymmetric membrane, a preparation method thereof and an ion rectification device. The graphite / aluminum oxide asymmetric membrane is prepared by a sol-gel method, the graphite is coated on the surface of one side of the graphite / aluminum oxide asymmetric membrane, and the surface of the graphite / aluminum oxide asymmetric membrane is provided witha hydroxyl functional group. The graphite / aluminum oxide asymmetric membrane is used for the ion rectification device, and the ion rectification device is simple in preparation process, low in cost and high in ion rectification ratio, and can be further applied to the fields of ion directional transportation, salinity gradient power generation and the like.

Description

technical field [0001] The invention relates to the bionic field of biological ion channels. Background technique [0002] There are a variety of biological nanochannels in organisms, which play a vital role in the operation of organisms and the coordination of internal environments. Biological ion channels are an important part of biological nanochannels, which control the flow of ions into and out of cells, the exchange of matter and energy between cells and the environment, and the transmission of information. They have the characteristics of gating, ion selectivity and ion rectification. [0003] In recent years, influenced by biological ion channels, biomimetic nanochannels have attracted great research interest. Biomimetic nanochannels are nanochannels with pore diameters ranging from 1 to 100 nanometers and pore lengths much larger than pore diameters prepared by imitating biological ion channels. Through appropriate construction methods, biomimetic nanochannels can ...

Claims

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Application Information

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IPC IPC(8): B05D7/24B05D7/00
CPCB05D7/24B05D7/00B05D2203/30
Inventor 刘兆阅落日凤
Owner BEIHANG UNIV
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