Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for modifying aromatic polyamide composite membrane active layer and application thereof

An aromatic polyamide and composite membrane technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. , Improve the effect of anti-pollution performance

Active Publication Date: 2019-08-06
ANHUI NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"A preparation method of anti-fouling and chlorine-resistant aromatic polyamide composite film" reported by Zhang Tianlin (patent application number: CN201510425149.9) uses the exposed phthalochlorine groups on the surface of the aromatic polyamide composite film to react with organic polyamines. Amination reaction to prepare aromatic polyamide composite membranes with primary amino groups on the surface, which does not involve chemical modification and the surface functional groups of the membranes are easy to lose after using the membranes for sewage treatment

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 modifying aromatic polyamide composite membrane active layer and application thereof
  • Method for modifying aromatic polyamide composite membrane active layer and application thereof
  • Method for modifying aromatic polyamide composite membrane active layer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for a modified aromatic polyamide active layer, comprising the following steps:

[0030] Step 1: 19g of methoxypolyethylene glycol mPEG with an average molecular weight of 1900 g / mol, 4g of propyne bromide and 12g of sodium hydroxide powder are placed in a reaction flask equipped with toluene solvent, mixed evenly, heated in a water bath to 50°C, magnetically stirred for 24 hours, after the reaction was complete, the solvent was removed by rotary evaporation, and the residue was mixed with anhydrous dichloromethane CH with a volume ratio of 1:1. 2 Cl 2 Extract with a mixed solvent of saturated saline to obtain an organic phase, then dry the organic phase with anhydrous magnesium sulfate, filter, and settle with ice anhydrous ether three times, and after filtration, polyethylene glycol monomethanol containing terminal alkyne groups is obtained. Ether (1900 g / mol);

[0031] Step 2: Take 0.01mL of sodium hypochlorite solution and dissolve it in 1000m...

Embodiment 2

[0035] A preparation method for a modified aromatic polyamide active layer, comprising the following steps:

[0036]Step 1: 10g of methoxypolyethylene glycol mPEG with an average molecular weight of 1000 g / mol, 4g of propyne bromide and 12g of sodium hydroxide powder are placed in a reaction flask equipped with toluene solvent, mixed evenly, heated in a water bath to 50°C, magnetically stirred for 24 hours, after the reaction was complete, the solvent was removed by rotary evaporation, and the residue was mixed with anhydrous dichloromethane CH at a volume ratio of 1:1. 2 Cl 2 Extract with a mixed solvent of saturated saline to obtain an organic phase, then dry the organic phase with anhydrous magnesium sulfate, filter, and settle with ice anhydrous ether three times, and after filtration, polyethylene glycol monomethanol containing terminal alkyne groups is obtained. Ether (1000 g / mol);

[0037] Step 2: Take 0.02mL of sodium hypochlorite solution and dissolve it in 1000mL o...

Embodiment 3

[0041] A preparation method for a modified aromatic polyamide active layer, comprising the following steps:

[0042] Step 1: 5g of methoxypolyethylene glycol mPEG with an average molecular weight of 500 g / mol, 4g of propyne bromide and 12g of sodium hydroxide powder are placed in a reaction flask equipped with toluene solvent, mixed evenly, heated in a water bath to 50°C, magnetically stirred for 24 hours, after the reaction was complete, the solvent was removed by rotary evaporation, and the residue was mixed with anhydrous dichloromethane CH at a volume ratio of 1:1. 2 Cl 2 Extract with a mixed solvent of saturated saline to obtain an organic phase, then dry the organic phase with anhydrous magnesium sulfate, filter, and settle with ice anhydrous ether three times, and after filtration, polyethylene glycol monomethanol containing terminal alkyne groups is obtained. Ether (500 g / mol);

[0043] Step 2: Take 0.02mL of sodium hypochlorite solution and dissolve it in 1000mL of ...

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 modifying an aromatic polyamide composite membrane, and the method comprises the following steps of: firstly preparing an aromatic polyamide composite membrane containing azide groups through nucleophilic substitution reaction; and then preparing an aromatic polyamide composite membrane connected with polyethylene glycol monomethyl ether by adopting CuI to catalyze click chemical reaction between acetylene and azide to finally realize the modification of the aromatic polyamide composite membrane. The anti-pollution performance of the modified aromatic polyamide composite membrane is tested, and it is found that the anti-pollution performance of the modified aromatic polyamide composite membrane is improved, the service life of the modified membrane is prolonged, a lasting modification effect is achieved, the polyethylene glycol monoethyl ether on the surface can give full play to the performance and is not easy to lost, the anti-pollution capabilityand hydrophilicity of the membrane are improved, the modified membrane has higher efficiency in sewage treatment, the hydrophilicity of the membrane is not reduced after the membrane is used for manytimes, and the modified membrane has wide commercial application value.

Description

technical field [0001] The invention relates to the field of modification of polymer composite membranes, in particular to a method for modifying an active layer of an aromatic polyamide composite membrane and its application. Background technique [0002] At present, the advantages of forward osmosis technology, such as low pollution and low energy consumption, are more and more widely used in sewage treatment and seawater desalination. focus on. For nearly 30 years, aromatic polyamides have dominated commercial composite membrane use. The aromatic polyamide composite membrane is generally composed of three layers, namely, the first reinforcement layer, which is generally made of polyester material; the second layer is the support layer, which is the polysulfone layer; and the third layer is the active layer, which is the polyamide layer. The active layer has good hydrophilicity, high retention rate and excellent biodegradability. However, severe fouling may occur in the...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/78B01D67/00B01D69/02
CPCB01D69/12B01D71/78B01D67/0006B01D69/02
Inventor 宇海银武芳顾家山
Owner ANHUI NORMAL UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com