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

Method for preparing reverse osmosis composite membrane containing azobenzene polyamide

A technology of reverse osmosis composite membrane and nitrogen-benzene polyamide, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., to achieve strong anti-pollution performance, high desalination rate and water flux, and good mechanical strength

Active Publication Date: 2015-05-13
GUANGDONG UNIV OF TECH
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LBL technology has not yet been applied. How to combine the two technologies to prepare a high-strength and stable reverse osmosis composite membrane is a difficult problem that needs to be overcome at present.

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
  • Method for preparing reverse osmosis composite membrane containing azobenzene polyamide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A production method of azobenzene-containing polyamide reverse osmosis composite membrane, comprising the following steps:

[0042] (1) Synthesis of p-aminoazobenzene derivatives (A)

[0043] Take 5.5g (0.04mol) p-nitroaniline, add 16g (0.16mol) concentrated HCl and 20gH 2 0, heated to dissolve under stirring, and then cooled in an ice-water bath to precipitate fine crystals of hydrochloride. Take another 3.3g (0.048mol) sodium nitrite, add 18gH 2 0 to form a solution, quickly added dropwise to the above hydrochloride, and reacted for 30 min under vigorous stirring. Use starch-potassium iodide test paper to check whether the reaction is complete, and use urea to remove excess nitrous acid generated in the reaction. The reaction solution was filtered to obtain a clear yellow filtrate which was the diazonium salt solution of p-nitroaniline.

[0044] Take 8.3g (0.048mol) of p-aminobenzenesulfonic acid and 1.0g (0.01mol) of concentrated hydrochloric acid, add 30g of H2O...

Embodiment 2

[0063] A production method of an azobenzene polyamide reverse osmosis composite membrane, comprising the following steps:

[0064] (1) Synthesis of p-aminoazobenzene derivative (A)

[0065] Substitute 5.5g (0.04mol) of p-nitroaniline in step (1) of Example 1 with 9.2g (0.04mol) of sodium p-aminobenzenesulfonate, and the rest are the same as in Example 1. The resulting product is p-aminoazosulfonic acid benzene (A2).

[0066] (2) Synthesis of side chain azoamide functional monomer (B)

[0067] Substitute 9.7 g (0.04 mol) of product A1 in step (2) of Example 1 with 13.5 g (0.04 mol) of product A2, and the rest are the same as in Example 1. The resulting product is methacrylamide azosulfobenzene (B2).

[0068] (3) Synthesis of azoamide homopolymer (C) with ω-halogen group at the end

[0069] Replace 31.1 g (0.1 mol) of product B1 in step (3) of Example 1 with 40.5 g (0.1 mol) of product B2, and the rest are the same as in Example 1. The resulting product is an azoamide homop...

Embodiment 3

[0073] A production method of an azobenzene polyamide reverse osmosis composite membrane, comprising the following steps:

[0074] (1) Synthesis of p-aminoazobenzene derivative (A)

[0075] In the step (1) of Example 1, p-nitroaniline was replaced with p-aminobenzoic acid, and the rest were the same as in Example 1. The obtained product is p-aminoazocarboxybenzene (A 3 ).

[0076] (2) Synthesis of side chain azoamide functional monomer (B)

[0077] Same as Example 1. The resulting product is methacrylamide azocarboxybenzene (B 3 ).

[0078] (3) Synthesis of azoamide homopolymer (C) containing ω-halogen group at the end group

[0079] Same as Example 1. The resulting product is an azoamide homopolymer containing an ω-halogen group at the end (C 3 ).

[0080] (4) Synthesis of Azobenzene & MMA Block Copolymer (D)

[0081] Same as Example 1.

[0082] (5) Synthesis of chain-type anionic / cationic azoamide homopolymer (E)

[0083] 40g of phenol in Example 1 was replaced w...

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 provides a method for preparing a reverse osmosis composite membrane containing azobenzene polyamide. The method comprises the following steps: through the instruction of series of azobenzene photoresponse groups and hydrophilic functional groups such as carboxyl and sulfonic acid groups, synthesizing azo-type anion / cation polyamide-function self-assembled molecules with ultraviolet photoresponse and a hydrophilic performance; then through the integration and coupling of electrostatic self-assembly and in situ photochemical reaction between layers, combining a layer-by-layer self-assembly technique with an ultraviolet curing technology science, and preparing the reverse osmosis composite membrane containing azobenzene polyamide, wherein the layer number is controllable, covalent bonds between the layers are firmly cross-linked, and the membrane body is charged, and high in mechanical strength, salt removing rate, water flux, and pollution resistance.

Description

technical field [0001] The invention relates to the field of reverse osmosis membrane preparation, in particular to a production method of azobenzene-containing polyamide reverse osmosis composite membrane. Background technique [0002] At present, most of the general-purpose reverse osmosis (RO) membranes at home and abroad are composite membranes containing azobenzene polyamides, which are mainly prepared by the interfacial polymerization method of polyamines and polyacyl chlorides, but the preparation process is complicated and the cost is high. The thickness of the epidermis is not easy to control, and there are fatal defects such as serious environmental pollution. Therefore, the further development and application of new high-performance reverse osmosis composite membranes has always been a research hotspot in the scientific and industrial circles. [0003] The performance of reverse osmosis composite membrane is closely related to the composition, structure 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): B01D71/82B01D71/56B01D69/12B01D69/02B01D67/00
Inventor 孙大雷方岩雄陈水挟张磊
Owner GUANGDONG UNIV OF TECH
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