Method for preparing micropore ceramic separation film

A technology of microporous ceramics and separation membranes, applied in separation methods, ceramic products, filtration and separation, etc., to achieve the effect of uniform pore structure and controllable pore size

Inactive Publication Date: 2008-12-17
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to control the process conditions to obtain a crack-free microporous ceramic separation membrane with uniform pore size distribution has not been well resolved.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Preparation of ceramic supports:

[0021] Ceramic powder Al with a particle size of 10 μm 2 o 3 and 0.3% dispersant polyacrylamide (PAA-NH 4 ) mixed to make ceramic separation membrane support material; ceramic powder can also be ZrO 2 , SiC or Ni 3 N 4 ;

[0022] Mix organic monomer acrylamide (AM) and crosslinking agent N, N'-methylenebisacrylamide (MBAM) by weight, MBAM is AM 1 / 18, and use deionized water as solvent to prepare the concentration 10% solution; the solution is added to the support material at a solid phase volume fraction of 52%, and ball milled for 4 hours;

[0023] Add 10% of the mass of the ceramic powder, and a pore-forming agent activated carbon with a particle size of 0.5 μm. After ball milling for 10 minutes, add 0.4% of the initiator ammonium persulfate (APS) of AM and 0.2% of AM by weight. Catalyst tetramethylethylenediamine (TEMED), mixed as a support body suspension slurry; the pore-forming agent can also be starch or graphite;

[002...

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PUM

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Abstract

The invention relates to a preparation method for a millipore ceramic separation membrane which belongs to the technical fields of ceramics material preparing and processing. After ceramic powder with a grain diameter of 5 to 15Mu m is mixed with a dispersant, the mixture of organic monomer acrylamide and a cross-linking agent N,N'-methylene diacrylamide is added to manufacture suspended nitride with a solid volume fraction of 45 to 55 percent which is sintered into a porous ceramic supporter after drying and demoulding; then ceramic powder with a grain diameter of 2 to 6Mu m is manufactured into surface membrane suspended nitride with a solid volume fraction of 10 to 25 percent according to the method; the supporter is dipped into the surface membrane suspended nitride and is uniformly extracted to obtain the millipore ceramic separation membrane after being dried and sintered. Through microscopic observation, the supporter is firmly combined with the surface membrane; pores are uniformly distributed; the surface membrane is uniform without defects. The preparation method overcomes the problem that the normal ceramic separation membrane material is easy to form macropores and has asymmetric organizational structures, thus causing the surface membrane to be easy to have the defects of pinholes and cracks.

Description

technical field [0001] The invention relates to a method for preparing a microporous ceramic separation membrane, in particular to a method for preparing a ceramic support body and a surface membrane by using a gel injection molding process, which belongs to the technical field of preparation and processing of ceramic materials. Background technique [0002] Membrane separation technology has attracted widespread attention all over the world. It is a new type of high-efficiency separation technology and a product of interdisciplinary research. Compared with traditional separation technologies, it has the advantages of high efficiency, energy saving, compact equipment, easy process control, and convenient operation. Membrane separation technology has been widely used in energy, electronics, petrochemical, medical and health, biochemistry, environment, metallurgy, food and other fields, forming a new high-tech industry. Ceramic membrane is a solid membrane with good chemical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/10C04B38/06B01D39/20
Inventor 周竹发王淑梅郭存心赵松芮一川
Owner SUZHOU UNIV
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