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

Anti-biological fouling reverse osmosis membrane and preparation method thereof

A technology of anti-biological pollution and reverse osmosis membrane, which is applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of toxicity, unfriendly human body and environment, anti-biological pollution, etc., and achieve the purpose of inhibiting growth and raw materials Convenient source and good antibacterial effect

Active Publication Date: 2019-04-16
恩泰环保科技(常州)有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an anti-biological fouling reverse osmosis membrane for the existing problems of adding antimicrobial agents to the reverse osmosis membrane, which have certain toxicity, are unfriendly to the human body and the environment, etc.

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
  • Anti-biological fouling reverse osmosis membrane and preparation method thereof
  • Anti-biological fouling reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Such as figure 1 As shown, in a specific embodiment, the preparation method of the anti-biological pollution reverse osmosis membrane includes at least the following steps:

[0032] Step S01. Grafting natural lignin with ferulic acid;

[0033] Step S02. Prepare a solution of ferulic acid grafted lignin and a cross-linking agent, and coat it on one surface of the polysulfone membrane support membrane layer, and then dry it to form an anti-pollution membrane layer;

[0034] Step S03. The m-phenylenediamine solution and the trimesoyl chloride solution are successively coated on the surface of the anti-fouling film layer, reacted and dried to obtain a dense film layer, and then rinsed and dried to obtain a bio-fouling reaction Permeable membrane.

[0035] Wherein, before the step of grafting lignin with ferulic acid, an extraction step of lignin may also be included.

[0036] In a preferred embodiment, the extraction method of lignin is as follows:

[0037] 1) Mix the dried crop ste...

Embodiment 1

[0063] (1) Extraction of lignin:

[0064] After crushing the sorghum straw, dry it at 60°C for 24 hours;

[0065] The dried sorghum straw powder was mixed with 2M sodium hydroxide solution in a mass ratio of 1:10, and heated in an oven at 60°C for 12 hours; the heated mixture was separated by a centrifuge at a speed of 5000 rpm for 15 minutes, Take the supernatant;

[0066] Adjust the pH value of the supernatant to 4.0 with 5M sulfuric acid, place it in an environment of 4°C for 12 hours, separate it with a centrifuge at a speed of 5000 rpm for 15 minutes, and collect the precipitated lignin;

[0067] After the collected lignin is dried, it is dissolved in a 0.5M sodium hydroxide solution so that the mass fraction of the lignin in the solution is 1%.

[0068] (2) Grafting treatment of ferulic acid:

[0069] Use 2M hydrochloric acid to adjust the sodium hydroxide solution containing 1wt% lignin in step (1) to make the pH=6.0, and then mix with 105mM potassium phosphate buffer solution in...

Embodiment 2

[0078] (1) Extraction of lignin:

[0079] After crushing the sorghum straw, dry it at 60°C for 24 hours;

[0080] Take the dried sorghum straw powder and 2M sodium hydroxide solution in a mass ratio of 1:10 for mixing treatment, and place it in an oven at 60°C for 12 hours; the heated mixture is passed through a centrifuge at 5000 rpm Rotate for 15 minutes and take the supernatant;

[0081] Adjust the pH value of the supernatant to 4.0 with 5M sulfuric acid, place it in an environment of 4°C for 12 hours, separate it with a centrifuge at a speed of 5000 rpm for 15 minutes, and collect the precipitated lignin;

[0082] After the collected lignin is dried, it is dissolved in deionized water so that the mass fraction of the lignin in the solution is 1%, heated to 60°C, and stored in an environment of 60°C.

[0083] (2) Coating treatment of lignin:

[0084] Using glyoxal as the solute, the glyoxal was dissolved in deionized water to prepare a 10 wt% crosslinking agent solution. The lignin ...

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
degree of graftingaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of a reverse osmosis membrane, and in particular relates to a biological pollution-resistant reverse osmosis membrane and a preparation method thereof. The biological pollution-resistant reverse osmosis membrane comprises a supporting membrane layer, and an anti-pollution membrane layer and a compact membrane layer which are successively combined outwards from one surface of the supporting membrane layer; and the anti-pollution membrane layer is formed by lignin grafted by ferulic acid. The biological pollution-resistant reverse osmosis membrane can effectively inhibit the growth of microorganisms on the surface of the membrane, the biological pollution resistance of the membrane is improved, and the reverse osmosis membrane has no adverse influence on the health of the human body and the environment while still keeping high water flux and high desalting rate and can be widely applied to the field of water treatment.

Description

Technical field [0001] The invention relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane resistant to biological pollution and a preparation method thereof. Background technique [0002] With the rapid development of society, the total content of fresh water on the earth can no longer meet the needs of people's lives. Desalination and water purification have eased people's demand for freshwater resources to a certain extent. Among them, whether in the desalination or water purification industry, reverse osmosis membranes have become the most commonly used membranes today. [0003] However, during the use of the reverse osmosis membrane, due to the attachment and reproduction of microorganisms such as bacteria, the surface of the reverse osmosis membrane is biologically fouled, resulting in a decrease in the permeability of the reverse osmosis membrane. Biological pollution has become one of the main problems faced by reverse osm...

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 Patents(China)
IPC IPC(8): B01D69/02B01D69/12B01D71/56B01D71/68B01D71/78B01D67/00B01D61/02
CPCB01D61/025B01D69/02B01D69/125B01D71/56B01D71/68B01D71/78B01D2323/38B01D2325/48
Inventor 王冀张晓民罗教明杨佳富吴术球陈剑
Owner 恩泰环保科技(常州)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