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Preparation method of hollow fiber ceramic oxygen permeable membrane with petal-shaped cross section

An oxygen-permeable membrane and cross-section technology, which is applied in the field of preparation of hollow fiber ceramic oxygen-permeable membranes, can solve the problems of thick membrane thickness, low separation efficiency, and low surface reaction exchange area, so as to increase the external surface area and promote the surface reaction. , the effect of increasing viscosity

Inactive Publication Date: 2020-03-24
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 hollow fiber ceramic oxygen permeable membrane with petal-shaped cross section
  • Preparation method of hollow fiber ceramic oxygen permeable membrane with petal-shaped cross section
  • Preparation method of hollow fiber ceramic oxygen permeable membrane with petal-shaped cross section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of the petal-shaped hollow fiber ceramic oxygen-permeable 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] 155g La 0.6 Sr 0.4co 0.2 Fe 0.8 o 3-δ Add the ceramic powder to 76.6 g 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 25500 MPa s; The average particle size of the ceramic powder is 1 μm.

[0052] (3) Preparation of hollow fiber ceram...

Embodiment 2

[0057] The preparation method of the petal-shaped hollow fiber ceramic oxygen-permeable membrane comprises the following steps:

[0058] (1) Preparation of polymer solution

[0059] Dissolve 12.5g polyethersulfone, 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.

[0060] (2) Preparation of ceramic-polymer casting solution

[0061] 157.5g Ba 0.5 Sr 0.5 co 0.8 Fe 0.2 o 3-δ Add the ceramic powder to 81g of the polymer solution obtained in step (1), and fully stir for 30 hours to make it completely and evenly dispersed in the polymer solution to form a ceramic-polymer casting solution with a viscosity of 30400MPa·s; The average particle size of the ceramic powder is 5 μm.

[0062] (3) Preparation of hollow fiber ceramic oxygen perm...

Embodiment 3

[0067] The preparation method of the petal-shaped hollow fiber ceramic oxygen-permeable membrane comprises the following steps:

[0068] (1) Preparation of polymer solution

[0069] Dissolve 12.5g of polysulfone, 0.5g of polyacrylamide, and 5g of polyacrylamide in 50g of N,N-dimethylformamide-d 7 , to obtain a polymer solution; wherein polyacrylamide is added in the form of a mixed solution: 0.5 g of polyacrylamide is dissolved in 5 g of water, and then added to 25 g of ethylene glycol to form a mixed solution.

[0070] (2) Preparation of ceramic-polymer casting solution

[0071] 200g Ba 0.5 Sr 0 .5Co 0.8 Fe 0.2 o 3-δ Add the ceramic powder to 98g of the polymer solution obtained in step (1), and stir it fully for 30 hours to completely and evenly disperse it in the polymer solution to form a ceramic-polymer casting solution with a viscosity of 38000MPa·s; The average particle size of the ceramic powder is 6 μm.

[0072] (3) Preparation of hollow fiber ceramic oxygen p...

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Abstract

The invention belongs to the technical field of ceramic membranes, and in particular relates to a preparation method of a hollow fiber ceramic oxygen-permeable membrane whose cross section is petal-shaped. The method comprises preparing a polymer solution, preparing a ceramic-polymer casting solution, preparing a hollow fiber ceramic oxygen-permeable membrane embryo, preparing a hollow fiber ceramic oxygen-permeable membrane; preparing a polymer solution: mixing an organic polymer, an additive A, an additive B It is prepared by dissolving in an organic solvent, wherein the mass ratio of the organic polymer, the additive A, the additive B, and the organic solvent is 12.5-25:0.1-5:0.5-25:50-100. The cross-section of the present invention is a petal-shaped hollow fiber ceramic oxygen-permeable membrane. The outer surface is no longer a smooth arc, but a curved surface with uniform ups and downs, which increases the outer surface area of ​​the hollow fiber ceramic oxygen-permeable membrane and promotes surface reaction; at the same time , and its outer surface can also be used as a bed for fixing various catalysts.

Description

technical field [0001] The invention belongs to the technical field of ceramic membranes, and in particular relates to a method for preparing a hollow fiber ceramic oxygen-permeable membrane whose cross section is petal-shaped. 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 wastewater treatment syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/08B01D71/02B01D53/22
CPCB01D53/228B01D67/0079B01D69/082B01D71/024
Inventor 刘少敏韩宁杨乃涛孟秀霞庄淑娟孟波
Owner SHANDONG UNIV OF TECH
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