Preparation method of monolithic polysulfone bipolar membrane with side group bonded with porphyrin group

A porphyrin group, bipolar membrane technology, applied in chemical instruments and methods, chelate ion exchange, membrane technology, etc., can solve the problem of low chemical stability and thermal stability of functional groups, and limited scope of use , low utilization rate of monomers, etc., to achieve good economic benefits and promotion value, improve stability and service life, and save the effect of film forming process

Active Publication Date: 2020-08-14
FUJIAN NORMAL UNIV
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has several obvious disadvantages: first, the grafting rate is low, and the grafting uniformity is also poor; second, because the porous material is used as the base membrane, the grafted monomers on both sides avoid mutual penetration, and the bipolar membrane The middle interface layer is not clear; the third is that the method of co-radiation grafting will cause a large amount of monomers to self-polymerize, and the utilization rate of the monomers is very low, which is not suitable for industrial production; the fourth is to achieve the required grafting rate. The grafted membrane is cleaned and grafted again (similar to the above-mentioned U.S. patent soaking the monomer solution multiple times and polymerizing), so that the synthesis steps are increased; the fifth is affected by the grafted monomer, the bipolar membrane prepared in the paper, Regardless of its positive or negative side, the chemical stability and thermal stability of its functional groups with ion exchange capabilities are not high, thus greatly limiting its scope of use

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 monolithic polysulfone bipolar membrane with side group bonded with porphyrin group
  • Preparation method of monolithic polysulfone bipolar membrane with side group bonded with porphyrin group
  • Preparation method of monolithic polysulfone bipolar membrane with side group bonded with porphyrin group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Take 50.0g of bromomethylated polysulfone into a three-necked flask, dissolve it with 60mL of N-methylpyrrolidone, and set aside. Weigh again 38.9g 3,4,5-trimethoxyphenol and 7.85g NaOH, dissolve with 30mL N-methylpyrrolidone, stir at room temperature for 0.5h, add dropwise to bromomethylated polysulfone solution, stir at room temperature 10h, after the reaction is over, use a mixed solvent precipitant with a volume ratio of water and ethanol of 1:1 to precipitate the product. After filtering, the precipitate is rinsed with ethanol several times, and the precipitate is soaked in deionized water. After 24 hours, filter and precipitate The product was vacuum-dried at 70°C to prepare a methoxy-containing polysulfone polymer.

[0043]

[0044] (2) Weigh 50.0 g of methoxy-containing polysulfone polymer into a 500 mL three-neck flask, install a constant pressure dropping funnel, and protect it with a nitrogen balloon after vacuuming. Add 240mL of pre-dried dichloromet...

Embodiment 2

[0055] (1) Synthesis of water catalyst in the middle layer of bipolar membrane-side chain bonded porphyrin substituent PL-PSF polymer: In a 1000mL three-necked flask, add 50.0g of bromomethylated polysulfone polymer and 500mL of DMAc to be copolymerized After the substance is fully dissolved, the 200mL DMAc solution and 11.2g NaHCO 3 , put them into a three-necked flask, raise the temperature to 50°C under the protection of nitrogen, and react at a constant temperature for 5 hours. After the reaction, immediately cool the system to room temperature with an ice-water bath, and use a mixture of distilled water and methanol as a precipitant to precipitate the product polymerization The material was washed with the mixed solution several times, and dried in vacuum to obtain a polymer (PL-PSF) with porphyrin (PL) bonded to the side chain.

[0056]

[0057] (2) Take 50.0g of bromomethylated polysulfone into a three-necked flask, dissolve it with 500mL of N-methylpyrrolidone, and ...

Embodiment 3

[0068] (1) Synthesis of water catalyst in the middle layer of bipolar membrane-side chain bonded porphyrin substituent PL-PSF polymer: In a 100mL three-necked flask, add 10.0g of bromomethylated polysulfone polymer and 100mL of DMAc to be copolymerized After the substance is fully dissolved, 50mL DMAc solution and 2.4g NaHCO 3 , put them into a three-necked flask, raise the temperature to 50°C under the protection of nitrogen, and react at a constant temperature for 5 hours. After the reaction, immediately cool the system to room temperature with an ice-water bath, and use a mixture of distilled water and methanol as a precipitant to precipitate the product polymerization The material was washed with the mixed solution several times, and dried in vacuum to obtain a polymer (PL-PSF) with porphyrin (PL) bonded to the side chain.

[0069]

[0070] (2) Take 50.0g of bromomethylated polysulfone into a three-necked flask, dissolve it with 500mL of N-methylpyrrolidone, and set asi...

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

No PUM Login to view more

Abstract

The invention relates to a preparation method of a monolithic polysulfone bipolar membrane with a side group bonded with a porphyrin group. The preparation method comprises the following steps: respectively synthesizing a polysulfone-based membrane mixed solution containing porphyrin and epoxy group side groups by taking bromo-methylated polysulfone and a bromo-methylated polysulfone polymer as starting raw materials, mixing, casting on a clean glass plate, and drying to prepare a polysulfone-based membrane containing porphyrin and epoxy group side groups; and sulfonating, aminating and quaternizing the base membrane, and washing with deionized water to obtain the monolithic polyaryletherketone bipolar membrane containing the phthalocyanine side group. According to the bipolar membrane prepared by the method, an epoxy group is introduced into a polysulfone side group through nucleophilic substitution reaction, and anion and cation exchange membranes are introduced into a polysulfone molecular chain so that a membrane forming process is omitted, and the use of carcinogen chloromethyl ether is avoided. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. And after long-term use, the problems of bubbling, cracking and the like of the middle interface layer, which are easily caused in the use process of the compositebipolar membrane, can be avoided.

Description

technical field [0001] The invention relates to a method for preparing a monolithic polysulfone bipolar membrane with side groups bonded to porphyrin groups. Oxygen group polysulfone is blended into a membrane as a base membrane material, and anion and cation are introduced through epoxy group reaction on both sides of the base membrane to synthesize a monolithic polysulfone bipolar membrane containing porphyrin group. Background technique [0002] Bipolar membrane is a new branch developed on the basis of ion exchange membrane technology, and has rapidly developed into a research hotspot in the field of membrane technology. It is usually a functional membrane with a three-layer structure composed of an anion exchange layer, a cation exchange layer and an intermediate catalytic layer that splits water rapidly. Under the action of a DC electric field, the water in the interface layer of the bipolar membrane dissociates, and H is obtained on both sides of the membrane. + and...

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): B01D71/82B01D71/68B01D67/00B01J45/00
CPCB01J45/00B01D71/68B01D71/82B01D67/0006
Inventor 黄雪红李晓燕丁富传
Owner FUJIAN NORMAL UNIV
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