Pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane and preparation method thereof

A technology of reverse osmosis composite membrane and chlorine-resistant polyamide, which is applied in the fields of semi-permeable membrane separation, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., and can solve problems such as poor chlorine resistance and anti-oxidation performance and increased operating costs , achieve anti-pollution performance and chlorine resistance performance improvement, simple preparation method, good anti-pollution and chlorine resistance performance

Inactive Publication Date: 2013-10-02
四川华创智诚工程设计咨询有限责任公司
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common way to control microbial pollution is to add hypochlorous acid or sodium hypochlorite to the raw material solution, however, the chlorine resistance and oxidation resistance of polyamide reverse osmosis composite membranes are extremely poor (the residual chlorine in the feed water of general commercial reverse osmosis membranes is required to be below...

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
  • Pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane and preparation method thereof
  • Pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane and preparation method thereof
  • Pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing an anti-pollution chlorine-resistant polyamide reverse osmosis composite membrane, comprising the steps of:

[0024] (1) Soak the polyamide layer in the raw material polyamide reverse osmosis composite membrane, which plays the role of desalination, in an aqueous solution of isopropanol with a pH of 10.0, a temperature of 50°C, and a concentration of 10.0 wt% for 100 minutes, take it out and wash it with pure water ;

[0025] (2) Soak the desalination polyamide layer in the raw material polyamide reverse osmosis composite membrane treated in step (1) in a mixed solution with a pH of 3.0 and a temperature of 50°C for 30 minutes, take it out and place it in a 100°C refrigerator Keep it in the oven for 100 minutes, take it out and wash it with pure water to obtain an anti-pollution chlorine-resistant polyamide reverse osmosis composite membrane; the mixed solution contains 5.0wt% anti-pollution chlorine-resistant hydrophilic polymer terpolymer in wat...

Embodiment 2

[0030] A method for preparing an anti-pollution chlorine-resistant polyamide reverse osmosis composite membrane, comprising the steps of:

[0031] (1) Soak the polyamide layer in the raw material polyamide reverse osmosis composite membrane, which plays the role of desalination, in an aqueous solution of isopropanol with a pH of 8.0, a temperature of 100°C, and a concentration of 2.0wt% for 200 minutes, take it out and wash it with pure water ;

[0032] (2) Soak the desalination polyamide layer in the raw polyamide reverse osmosis composite membrane treated in step (1) in a mixed solution with a pH of 1.0 and a temperature of 20°C for 60 minutes, take it out and place it in a 30°C refrigerator Keep in the oven for 150 minutes, take it out and wash it with pure water to obtain an anti-pollution chlorine-resistant polyamide reverse osmosis composite membrane; the mixed solution is water containing 0.01wt% anti-pollution chlorine-resistant hydrophilic polymer terpolymer and a so...

Embodiment 3

[0036] A method for preparing an anti-pollution chlorine-resistant polyamide reverse osmosis composite membrane, comprising the steps of:

[0037] (1) Soak the polyamide layer in the raw material polyamide reverse osmosis composite membrane, which plays the role of desalination, in an aqueous solution of isopropanol with a pH of 9.0, a temperature of 60°C, and a concentration of 15.0 wt% for 80 minutes, take it out and wash it with pure water ;

[0038] (2) Soak the desalination polyamide layer in the raw material polyamide reverse osmosis composite membrane treated in step (1) in a mixed solution with a pH of 4.0 and a temperature of 60°C for 20 minutes, take it out and place it in a refrigerator at 120°C Keep it in the oven for 80 minutes, take it out and wash it with pure water to obtain an anti-pollution and chlorine-resistant polyamide reverse osmosis composite membrane; the mixed solution is water containing 4.0wt% anti-pollution and chlorine-resistant hydrophilic polyme...

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 discloses a pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane and a preparation method thereof. The preparation method comprises the following steps of 1, immersing a polyamide layer of a pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane raw material in an isopropanol aqueous solution, taking out it, and washing it by pure water, and 2, immersing the treated polyamide layer in a mixed solution, taking out it, putting it into an oven for a certain time, and washing the dried polyamide layer by pure water to obtain the pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane, wherein the mixed solution is a water solution containing a compound shown in the formula (I) and glutaraldehyde; and in the formula (I) , R1 represents H or -CH3, R2 represents H or -CH3, R3 represents Cl, Br or I, R4 represents -CH3 or -C6H5, X is in a range of 1-100000, Y is in a range of 1-100000 and Z is in a range of 1-100000. The pollution-resistant chlorine polyamide-resistant reverse osmosis composite membrane has high pollution resistance and chlorine resistance. The preparation method has the simple processes.

Description

technical field [0001] The invention belongs to the polymer composite membrane in the field of water treatment, and in particular relates to a preparation method of a reverse osmosis composite membrane with anti-pollution and chlorine-resistant properties. technical background [0002] Polyamide reverse osmosis composite membrane has become the mainstream of commercial reverse osmosis membrane due to its high rejection rate and flux. Medicine and other fields have been widely used, and have achieved good economic and social benefits; in recent years, with the increasing shortage of global water resources and water pollution, reverse osmosis technology has been more and more popular in the fields of seawater desalination and water reuse. Wide application and attention. [0003] However, polyamide reverse osmosis composite membranes are susceptible to fouling, causing a decrease in water flux and rejection. Among them, the more common pollution is microbial and organic pollu...

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): B01D71/56B01D69/12B01D67/00C02F1/44
CPCY02A20/131
Inventor 孟建强倪磊李晓刚张宇峰
Owner 四川华创智诚工程设计咨询有限责任公司
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