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

Novel reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane, a new type of technology, applied in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as short service life, chlorine oxidation, flux and desalination rate limitations, etc.

Active Publication Date: 2018-08-28
重庆海通环保科技有限公司
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other reverse osmosis membranes, polyamide reverse osmosis composite membranes have obvious advantages, but they still face three problems: the mutually restrictive relationship between flux and salt ion rejection, membrane surface contamination and chlorine oxidation.
Unreacted monomers, especially arylamines, are easy to oxidize and change color, which not only affects the appearance of the reverse osmosis membrane, but also has a certain impact on the separation performance of the membrane
[0012] The purpose of the present invention is to overcome the mutual limitation of flux and desalination rate and the short service life due to pollution in the prior art

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
  • Novel reverse osmosis membrane and preparation method thereof
  • Novel reverse osmosis membrane and preparation method thereof
  • Novel reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] (1) Configuration solution 1: add to the stirrer and account for each component of following mass fraction: the dimethyl sulfoxide of 75%, the polyaryl sulfone of 20% and the ethylene glycol of 5%, under the vacuum of 10mbar Stir at a speed of 200r / min for 24 hours to obtain solution 1;

[0109] (2) Scrape coating support layer: cast solution 1 on the surface of the non-woven fabric, scrape off the solution layer on both sides of the non-woven fabric with a scraper, and then form a support on the surface of the non-woven fabric through gel phase inversion in a 10°C cold water bath layer, and then formed by pretreatment with hot water at 90°C to form a support layer with a thickness of 120 μm to obtain a film containing the support layer;

[0110] (3) Configure solution 2: add water and triethylamine to the agitator, stir evenly at a speed of 200r / min, then add m-phenylenediamine, continue stirring at the original speed until completely dissolved, and obtain solution 2; ...

Embodiment 2

[0119] (1) Configuration solution 1: add to the stirrer and account for each component of following mass fraction: the dimethyl sulfoxide of 75%, the polyaryl sulfone of 20% and the ethylene glycol of 5%, under the vacuum of 10mbar Stirring at a speed of 200r / min and vacuum stirring for 24 hours to obtain solution 1;

[0120] (2) Scrape coating support layer: cast solution 1 on the surface of the non-woven fabric, scrape off the solution layer on both sides of the non-woven fabric with a scraper, and then form a support on the surface of the non-woven fabric through gel phase inversion in a 10°C cold water bath layer, and then formed by pretreatment with hot water at 90°C to form a support layer with a thickness of 120 μm to obtain a film containing the support layer;

[0121] (3) Configure solution 2: add water and triethylamine to the agitator, stir evenly at a speed of 200r / min, then add m-phenylenediamine, continue stirring at the original speed until completely dissolved,...

Embodiment 3

[0130] (1) Configuration solution 1: add to the stirrer and account for each component of following mass fraction: the dimethyl sulfoxide of 75%, the polyaryl sulfone of 20% and the ethylene glycol of 5%, under the vacuum of 10mbar Stirring at a speed of 200r / min and vacuum stirring for 24 hours to obtain solution 1;

[0131] (2) Scrape coating support layer: cast solution 1 on the surface of the non-woven fabric, scrape off the solution layer on both sides of the non-woven fabric with a scraper, and then form a support on the surface of the non-woven fabric through gel phase inversion in a 10°C cold water bath layer, and then formed by pretreatment with hot water at 90°C to form a support layer with a thickness of 120 μm to obtain a film containing the support layer;

[0132] (3) Configure solution 2: add water and triethylamine to the agitator, stir evenly at a speed of 200r / min, then add m-phenylenediamine, continue to stir at the original speed until completely dissolved, ...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel reverse osmosis membrane and a preparation method thereof. The preparation method of the membrane disclosed by the invention comprises the steps of blade coating of a support layer, preparation of a function layer, preparation of a protection layer, etc. Through the means such as surface grafting modification, ultrasonic preparation of the function layer and mixed acid washing in aftertreatment, the problems of mutual restriction of flux and desalination rate and relatively short service life caused by pollution are overcome to a certain degree. The reverse osmosis membrane provided by the invention can realize a good effect in practical application.

Description

technical field [0001] The invention relates to a reverse osmosis membrane and a preparation method thereof. Background technique [0002] Seawater desalination methods mainly include thermal method and membrane method (reverse osmosis). Among them, the reverse osmosis membrane method has continuously expanded its application scale due to its advantages of low energy consumption and easy operation, and has surpassed thermal method to become the main technology for seawater desalination. [0003] Among them, polyamide reverse osmosis composite membrane has become the mainstream application membrane for seawater desalination by reverse osmosis membrane method due to its excellent separation performance. The polyamide reverse osmosis composite membrane generally consists of three layers: an ultra-thin (<200nm) polyamide active layer; a porous polysulfone (PSF) support layer (about 40 μm) and a non-woven (PET) mechanical support layer. The dense polyamide surface active lay...

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): B01D71/38B01D69/02B01D67/00B01D61/02
CPCB01D61/025B01D67/0006B01D69/02B01D71/38B01D2325/36Y02A20/131
Inventor 喻燕
Owner 重庆海通环保科技有限公司
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