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Preparation method of ceramic membrane with different surface roughness

A technology of surface roughness and ceramic membrane, applied in the field of new material preparation, can solve the problems of uneven surface and unsuitable template method, and achieve the effect of simple procedure, rapid preparation and uniform membrane surface morphology

Active Publication Date: 2010-10-06
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the high temperature resistance of ceramic membrane materials, it is not suitable for the above-mentioned template method; the grinding method is easy to form scratches on the surface of the material, resulting in uneven surface; the etching method is not suitable for ceramic materials with relatively stable chemical properties, and the ceramic membrane is specially changed. The method of surface roughness has not been reported at present, so finding a convenient and quick method to change the surface roughness of ceramic membranes has great significance for the preparation and application of ceramic membranes with different surface roughness

Method used

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  • Preparation method of ceramic membrane with different surface roughness
  • Preparation method of ceramic membrane with different surface roughness
  • Preparation method of ceramic membrane with different surface roughness

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Use 500mL of deionized water and 0.5g of polymethacrylate (PMMA) particles with an average particle size of 0.556μm to prepare a suspension with a concentration of 1g / L, and place the suspension in an ultrasonic instrument with an ultrasonic power of 500W and an ultrasonic frequency of 40KHz. Ultrasound for 35 minutes, and then the average pore size is 0.22μm, the membrane area is 7.1cm 2 The cellulose acetate membrane is the filter membrane, and the circulating water vacuum pump is used to filter 50mL polymethacrylate (PMMA) suspension under the vacuum degree of 0.09MPa, and the suction time is 20 minutes. The cellulose acetate film of the base acrylate (PMMA) layer is placed on the bottom of the mold, and the polymer layer is made upward, and the average particle diameter is 0.5 μm of alumina powder, adding binder PVA accounting for 4% of the powder mass, and then Pour the alumina powder containing PVA on the cellulose acetate film, the amount of alumina powder contai...

Embodiment 2

[0030] Use 500mL of deionized water and 1g of polystyrene (PS) particles with an average particle size of 0.638μm to configure a 2g / L suspension, and ultrasonicate the suspension for 40 minutes in an ultrasonic instrument with an ultrasonic power of 400W and an ultrasonic frequency of 80KHz. Then with an average pore size of 0.35 μm and a membrane area of ​​7.1 cm 2 The aromatic polyamide membrane is a filter membrane, and a circulating water vacuum pump is used to suction filter 25mL polystyrene (PS) suspension under a vacuum of 0.08MPa. The suction filtration time is 15 minutes, and then the surface with polystyrene (PS) The aromatic polyamide film of PS) layer is placed on the bottom of the mold, and the polymer layer is made upward, adding MC accounting for 6% of the quality of the zirconia powder in the zirconia powder with an average particle size of 0.5 μm, and then adding the MC containing The zirconia powder is poured on the aromatic polyamide film, and the amount of ...

Embodiment 3

[0032] Use 500mL of deionized water and 2g of polypropylene (PP) powder with an average particle size of 0.862 μm to configure a 4g / L suspension, and ultrasonicate the suspension in an ultrasonic instrument with an ultrasonic power of 300W and an ultrasonic frequency of 100KHz for 45 minutes. Then with an average pore size of 0.55 μm and a membrane area of ​​7.1 cm 2The polyvinyl chloride membrane is the filter membrane, and the circulating water vacuum pump is used to filter 10mL polypropylene (PP) suspension under the vacuum degree of 0.07MPa. The polyvinyl chloride film of the first layer is placed on the bottom of the mold, and the polymer layer is upward, and 8% PEG is added to the zirconia powder with an average particle size of 0.5 μm, and then the powder is poured on the polyvinyl chloride On the membrane, the amount of zirconia powder added with PEG is 0.7g / cm 2 (Based on the bottom area of ​​the mold), use a tablet press to press into a green body under the conditio...

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Abstract

The invention belongs to the field of new material preparation, in particular to a preparation method of ceramic membranes with different surface roughness. The preparation method of the invention comprises the following steps: using de-ionized water and polymer particles for preparing suspension liquid; carrying out ultra audible sound treatment on the suspension liquid in an ultrasonic instrument for uniformly dispersing the polymer particles; then, using an organic membrane as a filter membrane; carrying out suction filtration on the suspension liquid so that a layer of polymer particles is uniformly deposited on the surface of the organic membrane; then, placing the organic membrane on the bottom of a mold; adding ceramic powder bodies containing bonding agents into the mold; using a pelleting press for pressing the powder bodies into blanks at certain pressure; and finally, placing the pressed blanks into a furnace to be sintered at a high temperature to obtain the ceramic membrane with certain surface roughness. The method of the invention is simple, and the size of the polymer particles can be fast regulated for fast prepare the ceramic membrane with different surface roughness and uniform surface shape and appearance. The method is also applicable to the preparation of other inorganic materials with different surface roughness.

Description

technical field [0001] The invention belongs to the field of preparation of new materials, in particular to a method for preparing ceramic membranes with different surface roughnesses. Background technique [0002] As a new type of high-efficiency separation technology, membrane separation technology has achieved rapid development in recent years and has been widely used in chemical, food, biological, pharmaceutical and other industries. However, there are membrane fouling problems in the membrane application process, and a large number of particles adsorb And deposited on the surface of the membrane, causing a rapid attenuation of the flux and a reduction in the lifetime of the membrane. Studies have shown that membrane surface roughness is an important factor affecting filtration performance. The surface of solid materials is usually composed of many undulating peaks and valleys, with a certain roughness. Different surface roughness has a great influence on adsorption, we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622B28B3/00B28B1/30
Inventor 邢卫红仲兆祥张兵兵徐南平
Owner NANJING UNIV OF TECH
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