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A kind of preparation method of mfi-lta molecular sieve monolayer composite membrane

A molecular sieve and composite membrane technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of easy-off membrane performance, weakening, and loss of functional components, achieve a reliable technical route and theoretical basis, improve membrane-forming efficiency, and improve The effect of the degree of crosslinking

Inactive Publication Date: 2018-06-26
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing technology is cumbersome, difficult to enlarge, and the prepared anti-corrosion and hydrophilic bifunctional molecular sieve composite film is relatively thick and easy to fall off, and the film performance is weakened or even caused by the easy fall off of functional components or being wrapped. Loss and other problems, and proposed a preparation method

Method used

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  • A kind of preparation method of mfi-lta molecular sieve monolayer composite membrane
  • A kind of preparation method of mfi-lta molecular sieve monolayer composite membrane
  • A kind of preparation method of mfi-lta molecular sieve monolayer composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Add 0.1g of Al2O3 powder, 0.3g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30min;

[0045] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out, and let it dry naturally;

[0046] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 3000r / min;

[0047] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain the film-forming mother liquor;

[0048] (5) The coated surface of the aluminum alloy substrate obtained in step (3)...

Embodiment 2

[0055] (1) Add 0.2g of Al2O3 powder, 0.3g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30min;

[0056] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out, and let it dry naturally;

[0057] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 3000r / min;

[0058] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain the film-forming mother liquor;

[0059] (5) The coated surface of the aluminum alloy substrate obtained in step (3)...

Embodiment 3

[0062] (1) Add 0.1g of Al2O3 powder, 0.5g of Silicalite-I seed powder with a particle size of 500nm, and 1g of NaA molecular sieve powder with a particle size of 5μm into 100g of deionized water, and ultrasonically disperse for 30 minutes;

[0063] (2) Put the aluminum alloy substrate in the acetone and ethanol solutions respectively, after ultrasonication for 30 minutes, take it out and dry it naturally;

[0064] (3) Spin-coat the surface of the aluminum alloy substrate obtained in step (2), and the amount of coating solution is 10d / cm 2 , the spin coating time is 45s, and the rotation speed is 2000r / min;

[0065] (4) Mix 1.8ml of tetrapropylammonium hydroxide and 43.4ml of deionized water and stir for 30 minutes, add 0.043g of aluminum nitrate nonahydrate and mix and stir for 30 minutes, then continue to add ethyl orthosilicate and stir for 24 hours to obtain a film-forming mother liquor;

[0066] (5) The coated surface of the aluminum alloy substrate obtained in step (3) i...

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Abstract

The invention relates to preparation of a high-silicon molecular sieve and low-silicon molecular sieve composite film, and discloses a preparation method of an MFI-LTA molecular sieve composite film with high anticorrosion performance and hydrophilicity. The preparation method comprises the following steps: preparing a seed crystal coating liquid; conducting actification and coating on the surface of a metal matrix; mixing TPAOH with water, adding an aluminum source, mixing for dissolution, adding a silicon source, and stirring sufficiently to obtain an MFI-LTA molecular sieve composite film forming mother liquid; putting the treated metal matrix into a reaction kettle, adding the MFI-LTA molecular sieve composite film forming mother liquid, and carrying out hydrothermal film formation to obtain the MFI-LTA molecular sieve composite film. The MFI-LTA molecular sieve composite film prepared according to the preparation method is excellent in both corrosion resistivity and hydrophilicity, and has a wide application prospect in the fields of metal corrosion protection and hydrophilic thin films. The preparation method is simple and convenient to operate, high in film forming repeatability, and excellent in performance, and is suitable for industrial scale production.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic membrane materials, and relates to a synthesis method of a high-silicon-low-silicon molecular sieve composite membrane, in particular to a preparation method of a molecular sieve monolayer composite membrane with anti-corrosion performance and hydrophilic performance. Background technique [0002] Metal corrosion is a common problem encountered in the development of national industries. Every year, countries spend a lot of money on anti-corrosion treatment of metals and their alloys. Although chrome anti-corrosion coating is still an effective metal surface anti-corrosion coating, the heavy metal pollution and carcinogenic problems caused by this process have been eliminated. Molecular sieve films have been studied in the field of anti-corrosion due to their excellent physical and chemical stability. High-silicon or pure-silicon molecular sieve coatings have extremely strong anti-corrosion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 张钰暴跃张颖赵飞耿树东
Owner JILIN INST OF CHEM TECH
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