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

Preparation method of composite nano-filtration membrane with self-repairing, bacterium-resisting and solvent-resisting functions

A nanofiltration membrane and solvent-resistant technology, which is applied in the field of preparation of composite nanofiltration membranes, can solve the problems of increasing membrane separation use and operating costs, reducing separation efficiency and service life, and achieving increased added value and economic value, and the number of layers less, good thermal stability

Inactive Publication Date: 2017-01-11
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the bacteria and other pollutants intercepted by the nanofiltration membrane during the separation process will adhere to the surface of the membrane, forming biofilm or even biofouling, which not only blocks the membrane pores but also releases organic solutes, which reduces the separation efficiency and service life of the membrane, and increases the Membrane separation usage and operating costs

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
  • Preparation method of composite nano-filtration membrane with self-repairing, bacterium-resisting and solvent-resisting functions
  • Preparation method of composite nano-filtration membrane with self-repairing, bacterium-resisting and solvent-resisting functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add ε-polylysine cationic polyelectrolyte into deionized water, fully stir, add sodium chloride, stir evenly, obtain the cationic polyelectrolyte solution that mass fraction is 0.1%, wherein the concentration of sodium chloride is 0.5M, The pH value is 2.5.

[0031] (2) The zinc ion of 1mmol / L and the transition metal ion solution of europium ion and the bisleidyl oxalic acid solution of 1mmol / L are mixed, wherein all contain the sodium chloride of 5mmol / L in the transition metal ion solution and the bisleidyl oxalic acid solution , the pH value of the mixed system is adjusted to 5.5 with a buffer, and it is fully stirred to obtain a supramolecular polymer solution with a mass fraction of 0.1%, wherein the molar ratio of transition metal ions and bisleidyl oxalic acid in the supramolecular polymer solution is 1:1 .

[0032] (3) The alkali-modified polyacrylonitrile ultrafiltration membrane with a molecular weight cut-off of 50,000 is used as a base membrane, fixed ...

Embodiment 2

[0037] (1) Add chitosan cationic polyelectrolyte to deionized water, fully stir, add sodium chloride, stir evenly, obtain the cationic polyelectrolyte solution that mass fraction is 0.4%, wherein the concentration of sodium chloride is 0.5M, pH value is 3.

[0038] (2) the cobalt ion of 5mmol / L and the bisleidyl oxalic acid solution of iron ion transition metal ion solution and 5mmol / L are mixed, wherein all contain the sodium chloride of 5mmol / L in the transition metal ion solution and the bisleidyl oxalic acid solution , adjust the pH value of the mixed system to 6.5 with a buffer, stir well to obtain a supramolecular polymer solution with a mass fraction of 0.4%, wherein the molar ratio of transition metal ions and bisleidyl oxalic acid in the supramolecular polymer solution is 1:2 .

[0039] (3) The sulfonated polyethersulfone ultrafiltration membrane with a molecular weight cut-off of 30,000 is used as a base membrane, and is fixed in a container with a porous support la...

Embodiment 3

[0044] (1) ε-polylysine cationic polyelectrolyte is added to deionized water, fully stirred, sodium chloride is added, stirred evenly, and the cationic polyelectrolyte solution that obtains mass fraction is 0.2%, wherein the concentration of sodium chloride is 0.5M, The pH is 2.7.

[0045] (2) the zinc ion of 2mmol / L and the lanthanum ion transition metal ion solution and the bisleidyl oxalic acid solution of 3mmol / L are mixed, wherein all contain the sodium chloride of 5mmol / L in the transition metal ion solution and bisleidyl oxalic acid solution , adjust the pH value of the mixed system to 5.8 with a buffer, stir well to obtain a supramolecular polymer solution with a mass fraction of 0.2%, wherein the molar ratio of transition metal ions and bisleidyl oxalic acid in the supramolecular polymer solution is 1:1.5 .

[0046] (3) A cellulose acetate hollow fiber membrane with a molecular weight cut-off of 50,000 is used as a base membrane, and fixed in a container with a porou...

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
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a composite nano-filtration membrane with self-repairing, bacterium-resisting and solvent-resisting functions. The specific method comprises: mixing a transition metal ion solution and a bichelidoxalic acid solution; adjusting the pH (Potential of Hydrogen) value of a mixed system through utilizing a buffering solution; sufficiently stirring to obtain a super-molecular polymer solution; fixing a base membrane in a container with a porous supporting layer and putting a membrane surface upward; adding a cationic polyelectrolyte solution; pressurizing, assembling and washing with water; then adding into the super-molecular polymer solution, and pressurizing, assembling and washing with the water; carrying out heat treatment to obtain a double-layered modified membrane; repeating for 1 to 3 times to obtain a multilayered super-molecular polymer nano-filtration membrane; finally, immersing the multilayered super-molecular polymer nano-filtration membrane into a polylysine solution; pressurizing, assembling and washing with the water; carrying out the heat treatment to obtain the composite nano-filtration membrane with the self-repairing, bacterium-resisting and solvent-resisting functions. The preparation method provided by the invention is simple and efficient; the prepared nano-filtration membrane is high in flux and good in separation effect and also has self-repairing, bacterium-resisting, solvent-resisting and fluorescence performance.

Description

technical field [0001] The invention belongs to the technical field of membrane separation materials, and in particular relates to a preparation method of a self-repairing antibacterial and solvent-resistant composite nanofiltration membrane. Background technique [0002] Nanofiltration membrane is a separation membrane with a pore size of about 1nm and pressure as the driving force. The separation membrane can selectively separate monovalent and divalent ions, and has a high rejection rate for small molecular organics. The separation operation temperature of the filter membrane in the organic medium is low, and it is not easy to cause the degradation of the polymer and the decomposition of the small molecule. Therefore, the nanofiltration membrane needs to have good stability and mechanical strength in the organic medium. In order to make the nanofiltration membrane have good solvent resistance, the nanofiltration membrane needs to be insoluble in organic solvents or have a...

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): B01D69/12B01D69/02B01D67/00B01D71/42B01D71/68B01D69/08B01D71/16B01D61/00
CPCB01D69/12B01D61/027B01D67/0079B01D69/02B01D69/08B01D71/16B01D71/42B01D71/68B01D2325/48
Inventor 李风浪李舒歆
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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