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Positively charged microporous ceramic film and preparation method thereof

A technology of microporous ceramics and ceramic membranes, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of no separation and interception of viruses, insufficient viruses, and restrictions on the application of ceramic membranes

Active Publication Date: 2011-06-15
SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above research results show that ordinary ceramic filter membranes are very effective in separating tiny particles, large colloidal particles and bacteria in water, but there are serious deficiencies in filtering out viruses in water. This is because the pore size of ceramic filter membranes is mostly above 0.1 μm. The volume of viruses is smaller, generally less than 0.1 μm, so ordinary ceramic filter membranes have no separation and retention effect on viruses, which greatly limits the application of ceramic membranes in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix 500ml of yttrium chloride (YCl) with a concentration of 0.1 mol / L 3 ) aqueous solution into a reactor with magnetic stirring, heated to 50 ° C, under the condition of vigorous magnetic stirring, slowly add 200 ml of sodium hydroxide solution with a concentration of 0.8 mol / L to react for 1 hour, and obtain nano-yttrium hydroxide suspension slurry;

[0027] (2) Mix 50g of alumina micropowder and 3g of polyvinyl alcohol, perform mechanical grinding for 30 minutes, put the mixed material in a mold and press it, demould to form an alumina ceramic film blank, then dry it in an oven at 120°C for 2 hours, and then Sinter in a muffle furnace at 1200°C for 1 hour, and then obtain an alumina ceramic film substrate after cooling;

[0028] (3) Immerse the alumina ceramic membrane substrate obtained in step (2) into the yttrium hydroxide suspension slurry (1), then take it out and dry it in an oven at 80°C for 4h, and then burn it in a muffle furnace at 500°C for 2h After c...

Embodiment 2

[0031](1) Add 400ml of yttrium nitrate (Y(NO 3 ) 3 ) aqueous solution into a reactor with mechanical stirring, heated to 60 ° C, under the condition of vigorous mechanical stirring, slowly add 300ml of potassium hydroxide solution with a concentration of 2 mol / L to react for 0.5h, and obtain nano-yttrium hydroxide suspension slurry ;

[0032] (2) Mix 40g of diatomite micropowder, 4g of polyvinyl butyral and 5g of polyethylene glycol, perform mechanical grinding for 60 minutes, put the mixed material in a mold for compression molding, and demould to form a diatomite ceramic membrane blank. Then place it in an oven to dry at 100°C for 4 hours, then sinter it in a muffle furnace at 1000°C for 1 hour, and obtain the diatomite ceramic membrane matrix after cooling;

[0033] (3) Diatomaceous earth ceramic membrane matrix obtained in step (2) is impregnated with yttrium hydroxide suspension slurry (1), then taken out and placed in an oven for 2 hours at 70°C, and then fired in a mu...

Embodiment 3

[0035] (1) 300ml of zirconium nitrate (Zr(NO 3 ) 4 ) aqueous solution into a reactor with mechanical stirring, heated to 70 ° C, under the condition of vigorous mechanical stirring, slowly add 200 ml of sodium hydroxide solution with a concentration of 1.5 mol / L to react for 2 hours, and obtain nano zirconium hydroxide suspension slurry;

[0036] (2) Mix 20g of silica micropowder, 30g of alumina micropowder and 5g of carboxymethyl cellulose, perform mechanical grinding for 60 minutes, put the mixed material in a mold for pressing, demould to form a composite matrix ceramic membrane blank, and then place Dry in an oven at 90°C for 2 hours, then sinter in a muffle furnace at 1300°C for 2 hours, and obtain a composite ceramic membrane matrix after cooling;

[0037] (3) The composite ceramic membrane matrix obtained in step (2) is impregnated with the zirconium hydroxide suspension slurry (1), then taken out and dried in an oven at 70°C for 3 hours, and then fired in a muffle fur...

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PUM

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Abstract

The invention discloses a positively charged microporous ceramic film capable of separating and removing virus and a preparation method thereof. The positively charged microporous ceramic film disclosed by the invention is composed of a ceramic film substrate and inorganic positively charged materials dispersed in the ceramic film substrate, wherein the aperture size of the microporous ceramic film is 0.2-50 mu m, and the porosity of the microporous ceramic film is 20-80%. The preparation method of the positively charged microporous ceramic film disclosed by the invention comprises the following steps: firstly, respectively preparing inorganic suspended slurry and the ceramic film substrate, then impregnating the ceramic film substrate in the suspended slurry, taking out the ceramic film substrate, baking and burning to obtain the positively charged microporous ceramic film. The preparation procedure of the positively charged ceramic film provided by the invention is simple, the ceramic film has excellent performance, low cost and wide range of application, large-scale production of the ceramic film is easy to realize, and the existing production equipment and process for ceramic films can be fully utilized.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic membranes, in particular to a positively charged microporous ceramic membrane and a preparation method thereof. Background technique [0002] Compared with organic membranes, inorganic ceramic membranes have good stability, high temperature resistance, corrosion resistance, organic solvent resistance, and microbial erosion resistance; high mechanical strength, good pressure and wear resistance; steam sterilization, convenient cleaning and regeneration, etc. , can be used for gas separation, liquid separation and purification and membrane reactors, and has a wide range of applications in the fields of food industry, pharmaceutical and biological engineering, chemical and petrochemical industries, and environmental protection. [0003] At present, the most active research and application at home and abroad is the use of Al 2 o 3 , ZrO 2 、TiO 2 , SiO 2 Ceramic membranes made of other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00C02F1/44C02F1/50
Inventor 邓橙朱孟府游秀东宿红波陈平
Owner SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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