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Process of preparing tubular porous membrane with high permeating flux

A porous membrane, high-permeability technology, applied in the field of membrane separation, to achieve the effect of a simple method

Inactive Publication Date: 2009-09-02
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When magnetic substances are added to the membrane liquid, there is no literature report on the effect of the orthogonal magnetic field on the permeation performance of the tubular membrane.

Method used

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  • Process of preparing tubular porous membrane with high permeating flux
  • Process of preparing tubular porous membrane with high permeating flux
  • Process of preparing tubular porous membrane with high permeating flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: each get 300ml dimethylacetamide (DMAC) and place in 5 batching tanks, add 15.0g polyvinylpyrrolidone (PVP) therein respectively, weigh 240.0g, 140.0g, 90.0g, 60.0g g and 40.0g ferric oxide (Fe 3 o 4 ), and mixed with 60.0g polysulfone (PS) respectively and added to the above-mentioned batching tank respectively, after shaking quickly, shaking and dissolving at 55-60°C to form a uniform suspension, and then transferring it to the material tank for degassing. The membrane is prepared according to the preparation method of the capillary membrane in the present invention. The pressure of the material kettle is 0.2MPa, the temperature of the membrane liquid is 30°C, the inner gel bath is distilled water at 25°C, the air gap without magnetic field effect is 10mm, the air gap with magnetic field effect is 340mm, the air (humidity is 30%, temperature 25°C), the magnetic field intensity is 2100 Gauss, the length of the magnetic field section in the outer gel bat...

Embodiment 8

[0056] Take 150ml of dimethyl sulfoxide (DMSO) and place them in 5 batching tanks, add 5.9g of polyvinylpyrrolidone (PVP) to them respectively, and wait for it to fully dissolve; weigh 57.6g, 33.6g, 21.6g, 14.4 g and 9.6g ferric oxide (Fe 3 o 4), and mixed evenly with 14.4g polyacrylonitrile (PAN) respectively and added to the above-mentioned 5 batching tanks respectively, after quick shaking, shaking and dissolving evenly at 55-60°C, and defoaming. The coating film on the inner wall of the porous alumina tube with a pore size of 20 μm is evaporated in air (humidity less than 50%, temperature is 20° C.) for about 5 seconds, then placed in an orthogonal magnetic field (magnetic field strength 1000 Gauss) to continue evaporation for 25 seconds, and then Put the porous tube and the magnetic field device together into water for gelation for 15 minutes, then take out the porous tube and soak it in distilled water for 24 hours to obtain a magnetized film; the preparation method of ...

Embodiment 9

[0059] Embodiment 9: Get 120ml dimethylacetamide (DMAC) and place in the batching tank, add 13.0g polyethylene glycol respectively therein, treat that it fully dissolves; Take by weighing 30.0g magnetic carbon nanotubes, 5.0g polysulfone and Add 5.0g of polyethersulfone to the above-mentioned batching tank after mixing, shake it up quickly, dissolve it evenly with ultrasonic vibration at 55-60°C, and then defoam. After evaporating in air (humidity less than 60%, temperature 22°C) for 3 seconds on the outer wall of a porous polypropylene tube with a pore size of 10 μm, evaporate in an orthogonal magnetic field (magnetic field strength 3500 Gauss) for 12 seconds, and then Put the tube and the magnetic field device into water for gelation for 15 minutes, take out the porous tube and soak it in distilled water for 24 hours to obtain a magnetized film, and the measured pure water permeation flux is 1160L.m -2 .h -1 (25°C, 0.1MPa); the preparation method of the non-magnetized film ...

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Abstract

The present invention is process of preparing tubular porous membrane with high permeating flux. The process includes the following steps: mixing certain amount of additive, solvent, polymer and magnetic material through vibrating in certain temperature to compound homogeneous suspension; defoaming; wet or dry spinning to form capillary membrane or wet and dry phase converting to coat porous pipe to form membrane; and applying 100-18000 gauss cross magnetic field during evaporating and coagulating to form membrane. The tubular porous membrane with high permeating flux may be applied alone or as the porous support material for composite membrane.

Description

technical field [0001] The invention relates to a method for preparing a tubular porous membrane. The prepared porous membrane can be used directly or as a porous support material for other composite membranes. It belongs to the technical field of membrane separation. Background technique [0002] Porous membranes (including microfiltration membranes and ultrafiltration membranes) can be widely used in petrochemical, medical, pharmaceutical, electronics, food, environmental protection and other industrial fields, accounting for nearly 60% of the entire membrane industry market. The sales of microfiltration membranes in 2005 reached 792 million US dollars, and will grow at an average annual rate of 9.4% in the next five years. The sales of ultrafiltration membranes in the US market in 2005 were 579 million US dollars, 635 million US dollars in 2006, and are expected to reach 908 million US dollars by 2011, and the ultrafiltration membranes will grow at an average annual rate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/00B01D71/76
Inventor 黄征青陈坤
Owner HUBEI UNIV OF TECH