Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of composite hollow fiber membrane

A fiber membrane and hollow technology, applied in the field of polymer material preparation, can solve the problems of poor pollution resistance, low mechanical strength, and small flux, and achieve the effects of pollution-resistant cleaning, good mechanical properties, and large flux

Active Publication Date: 2015-06-10
徐州洁诚环保科技有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention designs a preparation method of a composite hollow fiber membrane, which solves the problems of low mechanical strength, poor pollution resistance and low flux of the current hollow fiber membrane

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of composite hollow fiber membrane includes the following steps:

[0029] Step 1: To prepare the casting liquid, 13% polymer material, 75% solvent, 2% additive and 10% chemical reaction porogen are stirred and blended at 60°C for 12 hours, and then stand still at 60°C. Soak for 25 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:6, and the solvent is N-methylpyrrolidone A mixture made with sulfolane and sulfolane in a mass ratio of 3:1. The additives are a mixture made of laurylamide propyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3. The chemical reaction causes The porogen is a mixture of methyl cellulose, titanium dioxide and aluminum oxide in a mass ratio of 5:2:2.

[0030] Step 2: Prepare the core liquid and the outer gel bath; the composition of the core liquid in parts by weight is: 40 p...

Embodiment 2

[0034] The preparation method of composite hollow fiber membrane includes the following steps:

[0035] Step 1: The preparation of the casting liquid is to mix 27% of polymer materials, 60% of solvents, 5% of additives and 8% of chemical reaction porogens, stir and blend at 60°C for 18h, and stand still at 70°C. Soak for 36 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:15, and the solvent is N-methylpyrrolidone A mixture made with sulfolane and sulfolane in a mass ratio of 3:1. The additives are a mixture made of laurylamide propyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3. The chemical reaction causes The porogen is a mixture of methyl cellulose, titanium dioxide and aluminum oxide in a mass ratio of 5:2:2.

[0036] Step 2: Prepare the core liquid and the outer gel bath; the composition of the core liquid in parts by ...

Embodiment 3

[0040] The preparation method of composite hollow fiber membrane includes the following steps:

[0041] Step 1: The preparation of the casting solution is to mix 18% of polymer materials, 68% of solvents, 7% of additives and 7% of chemical reaction porogens, stir and blend at 65°C for 16h, and stand still at 65°C. Soak for 28 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:10, and the solvent is N-methylpyrrolidone A mixture made with sulfolane and sulfolane in a mass ratio of 3:1. The additives are a mixture made of laurylamide propyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3. The chemical reaction causes The porogen is a mixture of methyl cellulose, titanium dioxide and aluminum oxide in a mass ratio of 5:2:2.

[0042] Step 2: Prepare the core liquid and the outer gel bath; the composition of the core liquid in parts b...

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 fluxaaaaaaaaaa
Wall thicknessaaaaaaaaaa
Bursting strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a composite hollow fiber membrane. The preparation method is characterized by comprising the following steps: preparing membrane casting liquid; preparing core liquid and external gel bath; injecting the core liquid and the membrane casting liquid together into a spinning nozzle by utilizing a dry-wet spinning device, and extruding together from the spinning nozzle so as to prepare a hollow fiber membrane filament; carrying out dry spinning on the hollow fiber membrane filament prepared in the previous step in a dry spinning path of 0-35cm, and carrying out gel phase conversion sequentially in first gel bath and second gel bath so as to form a macromolecule hollow fiber porous membrane with a micro duct. The composite hollow fiber membrane prepared by the invention is a hydrophilic hollow membrane material, has relatively high membrane flux at low pressure, is good in pollution resistance, and meanwhile has relatively good mechanical intensity because of complementarity of raw materials.

Description

Technical field [0001] The application for the present invention is a divisional application of an invention patent application named "a method for preparing a composite hollow fiber membrane" with the application number: 201310423328.X on September 17, 2013. The invention belongs to the field of polymer material preparation, and in particular relates to a method for preparing a composite hollow fiber membrane with high strength and high flux. Background technique [0002] Hollow fiber membranes are mainly used for filtration or dialysis in various fields. With composite membrane design, it is possible to study and select the separation composite layer membrane material and base membrane material separately, and it is easy to obtain a separation membrane with high separation function and high permeation flux. Therefore, the composite membrane technology has become one of the high-function separation membrane preparation technologies Important development direction. [0003] An im...

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): B01D71/22B01D71/14B01D69/12B01D69/08B01D67/00
Inventor 不公告发明人
Owner 徐州洁诚环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com