Mullite ceramic hollow fiber membrane and preparation method for same

A technology of fiber membrane and mullite, which is applied in the field of mullite ceramic hollow fiber membrane and its preparation, can solve the problems of high cost of ceramic membrane preparation, high sintering temperature, poor mechanical strength, etc., and achieve whisker aspect ratio can be achieved control, low sintering temperature, and achieve the effect of reduction

Inactive Publication Date: 2016-05-04
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commercial porous ceramic membranes are mostly made of alumina (α-Al 2 o 3 ≥99wt.%) is the main raw material, the cost of raw materials is high, and the sintering temperature is high, which leads to high preparation costs of these ceramic membranes
On the other ha

Method used

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  • Mullite ceramic hollow fiber membrane and preparation method for same
  • Mullite ceramic hollow fiber membrane and preparation method for same
  • Mullite ceramic hollow fiber membrane and preparation method for same

Examples

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Embodiment 1

[0027] Example 1: Preparation of Mullite Ceramic Hollow Fiber Membrane

[0028] According to the following steps: preparing polymer solution, preparing ceramic-polymer slurry, spinning membrane green body and sintering treatment, preparing low-cost reinforced mullite ceramic hollow fiber membrane, wherein:

[0029] 1 Preparation of polymer solution:

[0030] This example organic polymer is polyether sulfone (PES); Solvent is N-methylpyrrolidone; Additive is polyvinylpyrrolidone (PVP); The weight composition of each component when preparing polymer solution is: organic polymer: solvent: additive =18g:72g:2g; first dissolve the proportioned organic polymer and additives in the organic solvent, and wet ball milling and mixing for 24 hours to completely dissolve it to make a polymer solution;

[0031] 2 Preparation of ceramic-polymer slurry:

[0032] Add ceramic powder with a particle size distribution of 0.05-10 μm and an average particle size of 1.8 μm to the above polymer sol...

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Abstract

The invention discloses a mullite ceramic hollow fiber membrane and a preparation method for the same. The preparation method comprises the following steps of adding ceramic powder into a polymer solution prepared from an organic polymer, an additive and a solvent to prepare membrane casting slurry; performing stirring to obtain uniformly-dispersed membrane casting slurry; adding the membrane casting slurry into a slurry tank on a spinning device, performing vacuumizing, introducing core liquid, applying nitrogen pressure to extrude the vacuumized membrane casting slurry into a spinneret, immersing a wet fiber membrane extruded from the spinneret in an external coagulating bath through a 0 to 20cm dry spinning path, performing gelation solidification to form a ceramic hollow fiber membrane green body, naturally drying the green body, and placing the green body in a high-temperature furnace; raising the temperature to 700 DEG C to remove the organic polymer, raising the temperature to 800 to 1,600 DEG C for sintering, reducing the temperature to 500 DEG C, and then performing natural cooling. A prepared mullite ceramic hollow fiber membrane finished product is strong in strength, high in porosity, large in water flux, environmentally friendly and low in cost, can be directly used as a basement membrane of a micro-filtration or ultra-filtration membrane or a carrier of a catalyst in a membrane reactor, and can be industrialized on large-scale.

Description

technical field [0001] The invention relates to the field of inorganic membrane preparation, in particular to a mullite ceramic hollow fiber membrane and a preparation method thereof. Background technique [0002] Ceramic membrane is a selective separation membrane made of ceramic materials. It has the advantages of good chemical stability, anti-biological pollution, high temperature resistance, high separation efficiency, easy regeneration, and long service life. It has been widely used in environmental fields, pharmaceutical engineering, biological engineering, chemical industry, textile printing and dyeing industry. At present, the commercialized ceramic membranes are mainly tubular and multi-channel configuration membranes, which have the advantages of convenient installation, easy maintenance and high filtration efficiency, but such ceramic membranes are usually coated with single-layer or multi-layer membrane materials. An asymmetric structure formed on a support. Ea...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/02B01D67/00B01D61/14B01J32/00
CPCB01J32/00B01D61/145B01D61/147B01D67/0041B01D69/08B01D71/027
Inventor 董应超朱丽徐垒
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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