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: 2007-12-19
HUBEI UNIV OF TECH
View PDF1 Cites 14 Cited by
  • 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...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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] Example 1: Take 300ml of dimethylacetamide (DMAC) and place them in 5 batching tanks, respectively add 15.0g of polyvinylpyrrolidone (PVP) to them, and then weigh 240.0g, 140.0g, 90.0g, 60.0g in turn. g and 40.0 g iron tetroxide (Fe 3 O 4 ), and mixed with 60.0g of polysulfone (PS) respectively, and then added to the above-mentioned batching tank. The membrane is prepared according to the preparation method of the capillary membrane of the present invention. The pressure of the material kettle is 0.2MPa, the temperature of the film liquid is 30°C, the inner gel bath is distilled water at 25°C, the air gap without magnetic field is 10mm, the air gap with magnetic field is 340mm, air (humidity is 30%, temperature 25°C), the intensity of the magnetic field is 2100 Gauss, the length of the magnetic field action section in the outer gel bath is 1160mm, the outer gel bath is distilled water at 25°C, the traction speed is 15m / min, and the spun membrane is immersed in distill...

Embodiment 8

[0056] Take 150ml of dimethyl sulfoxide (DMSO) and place them in 5 batching tanks, respectively add 5.9g of polyvinylpyrrolidone (PVP) to them, and wait until they are fully dissolved; weigh 57.6g, 33.6g, 21.6g, 14.4g in turn g and 9.6 g iron tetroxide (Fe 3 O 4), and mixed with 14.4g of polyacrylonitrile (PAN), respectively, and then added to the above 5 batching tanks. Coat the inner wall of a porous alumina tube with a pore size of 20 μm, evaporate it in the air (humidity less than 50%, temperature 20°C) for about 5s, put it in an orthogonal magnetic field (magnetic field strength 1000 Gauss) and continue to evaporate for 25s, and then After the porous tube and the magnetic field action device were put into water for gelation for 15min, the porous tube was taken out and soaked in distilled water for 24 hours to obtain a magnetized film; the preparation method of the non-magnetized film used in the comparative study was as follows: in a porous alumina tube with a pore size ...

Embodiment 9

[0059] Example 9: take 120ml of dimethylacetamide (DMAC) and place it in a batching tank, add 13.0g polyethylene glycol to it, and wait for it to be fully dissolved; weigh 30.0g magnetic carbon nanotubes, 5.0g polysulfone and After mixing, 5.0 g of polyethersulfone was added to the above-mentioned batching tank, shaken quickly, dissolved uniformly by ultrasonic vibration at 55-60 °C, and then defoamed. Coat the outer wall of the porous polypropylene tube with a pore size of 10 μm, evaporate it in the air (humidity less than 60%, temperature is 22 °C) for 3s, put it in an orthogonal magnetic field (magnetic field strength 3500 Gauss) and continue to evaporate for 12s, and then the porous After the tube and the magnetic field action device were put into water for gelation for 15min, the porous tube was taken out and soaked in distilled water for 24 hours to obtain a magnetized film, and the pure water permeation flux was measured to be 1160 L.m -2 .h -1 (25°C, 0.1MPa); the prep...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Apertureaaaaaaaaaa
Pure water permeation fluxaaaaaaaaaa
Retention rateaaaaaaaaaa
Login to view more

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 preparation method of a tubular porous membrane, and the prepared porous membrane can be used directly or as a porous support material of 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 have 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 in 2011. Ultrafiltration membranes will grow at an average annual rat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D69/00B01D71/76
Inventor 黄征青陈坤
Owner HUBEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap