A kind of preparation method of porous ceramic membrane

Abstract

The invention discloses a preparation method of a porous ceramic membrane, which belongs to the technical field of inorganic non-metallic materials. In parts by weight, weigh in order: 15-35 parts of alumina powder, 4-10 parts of polyvinyl butyral, 5-12 parts of plasticizer, 8-12 parts of ethyl orthosilicate, 10-10 parts 15 parts of fatty acid, 5-8 parts of dispersant, 3-6 parts of surfactant, 8-18 parts of modified silica and 40-60 parts of ethanol, mix alumina powder with modified silica, and add Ethyl orthosilicate, fatty acid, surfactant and dispersant are used to obtain a pretreatment film-forming liquid, which is mixed with polyvinyl butyral, and a plasticizer is added to obtain a film-forming liquid. The membrane solution is cast into a membrane and sintered to obtain a pretreated porous ceramic membrane; the pretreated porous ceramic membrane is pickled, filtered, washed, and dried to obtain a porous ceramic membrane. The porous ceramic filter membrane provided by the invention has excellent bending strength, and the uniformity of pore size distribution is improved.

Description

technical field

[0001] The invention discloses a preparation method of a porous ceramic membrane, which belongs to the technical field of inorganic non-metallic materials. Background technique

[0002] Inorganic membrane is a kind of membrane processed and formed on the basis of inorganic materials. Although it appeared later than organic polymer membrane, it develops very rapidly and has a very broad prospect. Due to the advent of a large number of inorganic membrane products and their industrial applications, they have partially replaced organic polymer membranes in industries such as water treatment, dairy products, and beverages. At present, a new breakthrough has been made in the preparation technology of inorganic membranes. A microporous ceramic membrane with a multilayer asymmetric structure has been developed by using sol-gel technology. The pore diameter can reach below 3nm. This membrane has reached the level of separating gases. Become a strong competitor of org...

Examples

example 1

[0022]Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; the pretreated silica and distilled water were mixed in a flask at a mass ratio of 1:55, and the frequency was After ultrasonic dispersion at 65kHz for 30min, add a 25% titanyl sulfate solution with a mass fraction three times the mass of pretreated silica to the flask, and stir and mix for 2h at a temperature of 80°C and a rotational speed of 360r / min. Finally, the pretreated silica mixt...

example 2

[0024] Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; in parts by weight, weigh in sequence: 35 parts of alumina powder, 10 parts of polyvinyl alcohol Butyral, 12 parts plasticizer, 12 parts tetraethyl orthosilicate, 15 parts fatty acid, 8 parts dispersant, 5 parts pH regulator, 6 parts surfactant, 18 parts pretreated silica and 60 parts ethanol , mix alumina powder and pretreated silica in a mixer, and add orthosilicate ethyl ester, pH reg...

example 3

[0026] Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; the pretreated silica and distilled water were mixed in a flask at a mass ratio of 1:55, and the frequency was After ultrasonic dispersion at 65kHz for 30min, add a 25% titanyl sulfate solution with a mass fraction three times the mass of pretreated silica to the flask, and stir and mix for 2h at a temperature of 80°C and a rotational speed of 360r / min. Finally, the pretreated silica mix...

technical field

[0001] The invention discloses a preparation method of a porous ceramic membrane, which belongs to the technical field of inorganic non-metallic materials. Background technique

[0002] Inorganic membrane is a kind of membrane processed and formed on the basis of inorganic materials. Although it appeared later than organic polymer membrane, it develops very rapidly and has a very broad prospect. Due to the advent of a large number of inorganic membrane products and their industrial applications, they have partially replaced organic polymer membranes in industries such as water treatment, dairy products, and beverages. At present, a new breakthrough has been made in the preparation technology of inorganic membranes. A microporous ceramic membrane with a multilayer asymmetric structure has been developed by using sol-gel technology. The pore diameter can reach below 3nm. This membrane has reached the level of separating gases. Become a strong competitor of org...

Examples

example 1

[0022]Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; the pretreated silica and distilled water were mixed in a flask at a mass ratio of 1:55, and the frequency was After ultrasonic dispersion at 65kHz for 30min, add a 25% titanyl sulfate solution with a mass fraction three times the mass of pretreated silica to the flask, and stir and mix for 2h at a temperature of 80°C and a rotational speed of 360r / min. Finally, the pretreated silica mixt...

example 2

[0024] Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; in parts by weight, weigh in sequence: 35 parts of alumina powder, 10 parts of polyvinyl alcohol Butyral, 12 parts plasticizer, 12 parts tetraethyl orthosilicate, 15 parts fatty acid, 8 parts dispersant, 5 parts pH regulator, 6 parts surfactant, 18 parts pretreated silica and 60 parts ethanol , mix alumina powder and pretreated silica in a mixer, and add orthosilicate ethyl ester, pH reg...

example 3

[0026] Mix sodium silicate solution with a mass fraction of 18% and polyethylene glycol in a beaker at a mass ratio of 5:1, and adjust the pH of the material in the beaker to 10.0 with a mass fraction of 20% sulfuric acid. After curing for 40 minutes, continue to adjust the pH of the material in the beaker to 8.0 with 20% sulfuric acid by mass fraction, age for 50 minutes at a temperature of 85°C, and filter with suction to obtain a pretreated silica blank. After the silica blank was washed with water for 12 times, and dried for 3 hours at a temperature of 80°C, pretreated silica was obtained; the pretreated silica and distilled water were mixed in a flask at a mass ratio of 1:55, and the frequency was After ultrasonic dispersion at 65kHz for 30min, add a 25% titanyl sulfate solution with a mass fraction three times the mass of pretreated silica to the flask, and stir and mix for 2h at a temperature of 80°C and a rotational speed of 360r / min. Finally, the pretreated silica mix...

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