Process of preparing plate porous membrane with high permeating flux

A high-permeability, flat-plate membrane technology, applied in the field of membrane separation, to achieve the effect of high penetration of membrane pores, high porosity, and reduced resistance

Inactive Publication Date: 2007-12-19
HUBEI UNIV OF TECH
View PDF1 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, when a high content of magnetic substances is added to the membrane liquid, the effec

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1: Polyacrylonitrile / Fe 3 O 4 Preparation of porous membrane

[0033] See Figure 1. The orthogonal magnetic field can be prepared by two or more permanent magnets and magnetic materials. The number of magnets is determined by the area of ​​the film; the strength of the magnetic field can be controlled by the distance between the upper and lower magnets and the position of the film in the magnetic field. , The greater the distance between the upper and lower magnets, the smaller the magnetic field strength; when the film is in the middle of the magnetic field, the magnetic field strength is smaller, and the closer the distance between the film and the upper and lower magnets, the greater the magnetic field strength.

[0034] Take 100ml of dimethyl sulfoxide (DMSO) and place them in 5 iodine measuring flasks, add 3.9g of polyvinylpyrrolidone (PVP) to them, and wait until they are fully dissolved; weigh 57.6g, 33.6g, 21.6g, 14.4g and 9.6g ferroferric oxide (Fe 3 O 4 ),...

Example Embodiment

[0038] Example 2:

[0039] Take 100ml of dimethylacetamide (DMAC) and place it in an iodine measuring flask, add 5.0g of polyvinylpyrrolidone (PVP) to it, and wait until it is fully dissolved; weigh 12.0g of ferroferric oxide (Fe 3 O 4 ) After mixing with 20.0 g of polysulfone, add it to the above iodine measuring flask, shake quickly, shake at 55-60°C to dissolve evenly, and then defoam. Scrape the film on the glass plate, evaporate in the air (humidity less than 50%, temperature 20℃) for 5 seconds, put it in an orthogonal magnetic field (magnetic field strength of 1800 Gauss) and continue to evaporate for 25 seconds, add water under the action of the magnetic field to gel for 15 minutes After that, the membrane was taken out and soaked in distilled water for 24 hours to obtain a magnetized membrane, and its pure water permeation flux was measured to be 1300L.m -2 .h -1 (25℃, 0.1MPa), the rejection rate for bovine serum albumin is 43.9%; while scraping the film on a glass plate, ...

Example Embodiment

[0040] Example 3:

[0041] Take 100ml of N-methylpyrrolidone, 2.0g of polyethylene glycol and 16.0g of dipentyl metal organic polymer ferromagnetic particles after heating and dissolving at 198°C, cooling to 70°C, adding 10.0ml of formic acid and 1.0g of polyethersulfone, and mixing After homogenization, stir and dissolve completely at 60°C before defoaming. Scrape the film on the polyester non-woven fabric, evaporate in the air (humidity less than 50%, temperature 20°C) for 5 seconds, put it in an orthogonal magnetic field (magnetic field strength 10000 Gauss) and continue to evaporate for 25 seconds, and put it under the action of a magnetic field After gelling in a water bath for 15 minutes, the membrane was taken out and soaked in distilled water for 24 hours to obtain a magnetized membrane. The pure water permeation flux was measured to be 730L.m. -2 .h -1 (25℃, 0.1MPa), the rejection rate of bovine serum albumin is 90.9%; while scraping the film on polyester non-woven fabric...

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
Pure water permeation fluxaaaaaaaaaa
Pure water permeation fluxaaaaaaaaaa
Pure water permeation fluxaaaaaaaaaa
Login to view more

Abstract

The present invention is process of preparing plate porous membrane with high permeating flux. The process includes the following steps: 1. mixing certain amount of additive, solvent, polymer and magnetic material to compound filming liquid; and 2. applying 100-18000 gauss cross magnetic field during evaporating and coagulating to form membrane. The plate 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 provides a method for preparing a flat porous membrane with high permeation flux. 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...

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): B01D69/06B01D71/76
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