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

High-selectivity self-microporous polyamide nanofiltration composite membrane and preparation method thereof

A high-selectivity, polyamide nanotechnology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as poor pollution resistance, insufficient selectivity, and large membrane surface roughness.

Active Publication Date: 2021-09-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to prepare a highly selective self- Microporous nanofiltration membranes to solve the problems of low flux, insufficient selectivity and poor pollution resistance caused by the large surface roughness of the existing self-microporous nanofiltration membranes due to their hydrophobicity

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
  • High-selectivity self-microporous polyamide nanofiltration composite membrane and preparation method thereof
  • High-selectivity self-microporous polyamide nanofiltration composite membrane and preparation method thereof
  • High-selectivity self-microporous polyamide nanofiltration composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment 1 provides a kind of preparation method of highly selective self-microporous polyamide nanofiltration composite membrane, comprising the following steps:

[0044] (1) Dissolve PIP (piperazine) in water to obtain a 1% PIP solution with a mass concentration of 2,8-diamino-4,10-dimethyl-6H,12H-5,11-methylenediphenyl And [1,5]-diaziridine sulfonate was added to the PIP solution at a mass concentration of 1%, and stirred to fully dissolve it to obtain an aqueous phase mixed amine solution;

[0045] (2) Immerse the polysulfone-based membrane in the aqueous mixed amine solution, take it out after soaking for 3 minutes, and dry the residual aqueous-phase mixed amine solution on the surface of the polysulfone-based membrane with an air knife;

[0046] (3) Adopting trimesoyl chloride and organic solvent n-hexane to prepare an organic phase trimesoyl chloride solution with a mass concentration of 0.1%, immersing the upper surface of the film obtained in step (2) in...

Embodiment 2

[0053] This embodiment 2 provides a kind of preparation method of highly selective self-microporous polyamide nanofiltration composite membrane, comprising the following steps:

[0054] (1) Dissolve ethylenediamine in water to obtain an ethylenediamine solution with a mass concentration of 2%, and 3,9-diamino-4,10-dimethyl-6H,12H-5,11-methylenediamine Benzo[1,5]-diazepine propane sulfonate is added to the ethylenediamine solution at a mass concentration of 2%, and stirred to fully dissolve it to obtain an aqueous mixed amine solution;

[0055] (2) Immerse the polysulfone base membrane in the mixed amine solution of the water phase, take it out after soaking for 2 minutes, and dry the residual water phase solution on the surface of the polysulfone base membrane with a rubber roller;

[0056] (3) Adopting pyromellitic acid chloride and organic solvent n-heptane to prepare an organic phase pyromellitic chloride solution with a mass concentration of 0.2%, immersing the upper surfa...

Embodiment 3

[0060] This embodiment 3 provides a kind of preparation method of highly selective self-microporous polyamide nanofiltration composite membrane, comprising the following steps:

[0061] (1) Dissolving piperazine in water to obtain a piperazine solution with a mass concentration of 1%, 3,9-diamino-4,10-dimethyl-6H,12H-5,11-methylenedibenzo[ 1,5]-diazacycline sulfonate was added to the PIP solution at a mass concentration of 1%, and stirred to fully dissolve it to obtain an aqueous phase mixed amine solution;

[0062] (2) Immerse the polysulfone base membrane in the mixed amine solution of the water phase, take it out after soaking for 2 minutes, and dry the residual water phase solution on the surface of the polysulfone base membrane with an air knife;

[0063] (3) Adopting trimesoyl chloride and organic solvent n-hexane to prepare an organic phase trimesoyl chloride solution with a mass concentration of 0.1%, immersing the upper surface of the film obtained in step (2) in the ...

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
Permeate fluxaaaaaaaaaa
Permeate fluxaaaaaaaaaa
Permeate fluxaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-selectivity self-microporous polyamide nanofiltration composite membrane and a preparation method thereof. The composite membrane is formed by compounding an ultrafiltration base membrane and a polyamide separation layer, wherein the polyamide separation layer is formed by polymerizing a water-phase mixed amine solution and an organic acyl chloride solution on the surface of the ultrafiltration base membrane, the water-phase mixed amine solution is a mixed solution of organic amine and an amine monomer which contains a sulfonic acid quaternary ammonium salt group and has a rigid twisted structure; the ultrafiltration base membrane can also adopt a surface hydrophilic modified ultrafiltration base membrane, and the polyamide separation layer is polymerized on the surface of the hydrophilic modified ultrafiltration base membrane in an in-situ support-free interface polymerization mode, so that the ultrathin high-selectivity self-microporous polyamide nanofiltration composite membrane can be obtained. The high-selectivity self-microporous nanofiltration membrane is prepared by introducing a novel amine monomer which contains a sulfonic acid quaternary ammonium salt group and has a rigid twisted structure, and the problems that an existing self-microporous nanofiltration membrane is relatively hydrophobic, so that the flux is low, the selectivity is insufficient, the pollution resistance is poor due to large membrane surface roughness and the like can be solved.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membrane preparation, in particular to a highly selective self-microporous polyamide nanofiltration composite membrane and a preparation method thereof. Background technique [0002] The shortage of clean water has always been a daunting and long-term challenge faced by mankind worldwide, which is further exacerbated by water pollution caused by industrial wastewater discharge. Due to the advantages of process controllability, low cost, high efficiency and environmental protection, membrane separation technology has become an effective way to alleviate the shortage of clean water, realize energy saving, emission reduction and environmental protection. Separation membranes mainly include microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes and dialysis membranes. Among them, the nanofiltration membrane can realize the selective separation...

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): B01D69/12B01D67/00
CPCB01D69/12B01D69/125B01D67/0006Y02A20/131
Inventor 侯影飞蒋驰姜琳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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