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Preparation method of bicomponent asymmetric hollow fiber ceramic membrane with petal-shaped cross section

A technology of cross-section and ceramic membrane, which is applied in the field of preparation of two-component asymmetric hollow fiber ceramic membrane, can solve the problems of low surface reaction exchange area, small membrane surface area and volume, and low separation efficiency, so as to promote surface reaction, The effect of saving cost and improving mass transfer rate

Inactive Publication Date: 2019-12-20
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sheet or plate ceramic membranes used in laboratory research have the problems of too small membrane surface area to volume ratio and relatively thick membrane thickness in actual production applications, resulting in relatively low exchange area for surface reactions and low separation efficiency.

Method used

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  • Preparation method of bicomponent asymmetric hollow fiber ceramic membrane with petal-shaped cross section
  • Preparation method of bicomponent asymmetric hollow fiber ceramic membrane with petal-shaped cross section
  • Preparation method of bicomponent asymmetric hollow fiber ceramic membrane with petal-shaped cross section

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of the petal-shaped two-component asymmetric hollow fiber ceramic membrane comprises the following steps:

[0048] (1) Preparation of polymer solution

[0049] Dissolve 12.5g of polyethersulfone, 0.1g of polyacrylamide, and 1g of polyvinylpyrrolidone in 50g of N,N-dimethylformamide-d 7 , to obtain a polymer solution; wherein polyacrylamide is added in the form of a mixed solution: 0.1 g of polyacrylamide is dissolved in 3 g of water, and then added to 10 g of ethylene glycol to form a mixed solution.

[0050] (2) Preparation of ceramic-polymer casting solution

[0051] 145g Al 2 o 3 Add the ceramic powder to 74.6g of the polymer solution obtained in step (1), and fully stir for 24 hours to completely and evenly disperse it in the polymer solution to form a ceramic-polymer casting solution with a viscosity of 26000MPa·s; The average particle size of the ceramic powder is 1 μm.

[0052] (3) Preparation of hollow fiber ceramic membrane embryo bo...

Embodiment 2

[0060] The preparation method of the petal-shaped two-component asymmetric hollow fiber ceramic membrane comprises the following steps:

[0061] (1) Preparation of polymer solution

[0062] Dissolve 12.5g polyethyleneimine, 0.5g polyacrylamide, 2g polyvinyl butyral in 50g N,N-dimethylformamide-d 7 , to obtain a polymer solution; wherein polyacrylamide is added in the form of a mixed solution: 0.5 g of polyacrylamide is dissolved in 5 g of water, and then added to 20 g of ethylene glycol to form a mixed solution.

[0063] (2) Preparation of ceramic-polymer casting solution

[0064] 145.5g SiO 2 Add the ceramic powder to 79g of the polymer solution obtained in step (1), and fully stir for 30 hours to completely and evenly disperse it in the polymer solution to form a ceramic-polymer casting solution with a viscosity of 27400MPa·s; The average particle size of the ceramic powder is 4 μm.

[0065] (3) Preparation of hollow fiber ceramic membrane embryo body with petal-shaped cro...

Embodiment 3

[0072] The preparation method of the petal-shaped two-component asymmetric hollow fiber ceramic membrane comprises the following steps:

[0073] (1) Preparation of polymer solution

[0074] Dissolve 12.5g polysulfone, 0.5g polyacrylamide, 4g polyammonium methacrylate in 50g N,N-dimethylformamide-d 7 , to obtain a polymer solution; wherein polyacrylamide is added in the form of a mixed solution: 0.5 g of polyacrylamide is dissolved in 5 g of water, and then added to 25 g of ethylene glycol to form a mixed solution.

[0075] (2) Preparation of ceramic-polymer casting solution

[0076] 75g Al 2 o 3 Ceramic powder and 75g TiO 2 Add the ceramic powder to 96g of the polymer solution obtained in step (1), and fully stir for 30 hours to completely and evenly disperse it in the polymer solution to form a ceramic-polymer casting solution with a viscosity of 27000MPa·s; The average particle size of the ceramic powder is 5 μm.

[0077] (3) Preparation of hollow fiber ceramic membran...

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Abstract

The invention belongs to the technical field of inorganic membrane separation, and in particular relates to a preparation method of a double-component asymmetric hollow fiber ceramic membrane with a petal-shaped cross section. The method comprises preparing a polymer solution, preparing a ceramic-polymer casting solution, preparing a hollow fiber ceramic membrane embryo body, preparing a hollow fiber ceramic membrane matrix with a petal-shaped cross section, and preparing a two-component asymmetric cross-section with a petal-shaped cross section. Hollow fiber ceramic membrane. The outer surface of the hollow fiber ceramic membrane matrix of the present invention is no longer a smooth arc, but a uniformly undulating curved surface, which increases the outer surface area of ​​the hollow fiber ceramic membrane; the porous structure of the novel hollow fiber ceramic membrane matrix improves the mass transfer rate. In addition, a selectively permeable functional thin film layer is deposited on the outer surface of the hollow fiber ceramic membrane matrix. Compared with the traditional hollow fiber ceramic membrane, the mass transfer rate is greatly improved, the surface reaction is promoted, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of inorganic membrane separation, and in particular relates to a preparation method of a double-component asymmetric hollow fiber ceramic membrane with a petal-shaped cross section. Background technique [0002] Ceramic membrane is a kind of diaphragm with high selective permeability and separation function made of ceramic materials. It has good chemical stability, can be used under high temperature conditions, and has anti-microbial ability; and because of its high mechanical strength, separation The advantages of high efficiency and long service life can be widely used in the field of separation and purification and catalytic reaction. For example, Chinese patent CN101733048A discloses a hollow fiber membrane reactor for gas phase oxidation reaction and its preparation and application; Chinese patent CN106630109A discloses a A ceramic membrane and its preparation method, ceramic membrane assembly, and wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/08
CPCB01D67/0039B01D69/082B01D71/024
Inventor 刘少敏韩宁杨乃涛孟秀霞张津津孟波
Owner SHANDONG UNIV OF TECH
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