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

A kind of preparation method of structurally stable cellulose flat nanofiltration membrane

A technology with stable structure and regenerated cellulose membrane, applied in chemical instruments and methods, membranes, membrane technology, etc., to achieve the effects of good anti-pollution, high water flux and strength, and good hydrophilicity

Active Publication Date: 2022-06-14
FUJIAN AGRI & FORESTRY UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no stable chemical bond established between the active layer and the support layer, only relying on the physical effect of mutual adhesion, in long-term use, the support layer and the active layer are separated from each other, resulting in a decrease in the separation performance of the nanofiltration membrane, which needs to be regularly checked. Replace with new separation membrane, the service life is shorter

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
  • A kind of preparation method of structurally stable cellulose flat nanofiltration membrane
  • A kind of preparation method of structurally stable cellulose flat nanofiltration membrane
  • A kind of preparation method of structurally stable cellulose flat nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] 2) Prepare a 2 g / L dopamine solution with Tris-HCl buffer (50 mM, pH=7-9), then cut the obtained regenerated cellulose membrane into a circular sheet with a diameter of 5 cm, and place it on the obtained Dopamine solution was shaken at constant temperature for 4 hours to make dopamine self-polymerize, and then fully washed with deionized water to obtain a surface-modified regenerated cellulose membrane (PDA-RCM);

[0027] 3) Soak the obtained surface-modified regenerated cellulose membrane in 0.1 wt% PIP aqueous solution for 20 min, take it out, blot the remaining droplets on the surface with filter paper, and then fix it on a 10cm×10cm glass plate;

[0028] 4) Soak the membrane material fixed on the glass plate in 0.3 wt% TMC n-hexane solution for 3.5 minutes, so that the two monomers of PIP and TMC undergo interfacial polymerization reaction, and form a polyamide active layer on the membrane surface;

[0029] 5) After the reaction was completed, the residual organic p...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a cellulose flat nanofiltration membrane with a stable structure, which uses a regenerated cellulose membrane as a support layer, immerses it in a dopamine solution for surface modification, and then uses the surface-modified regenerated cellulose membrane Put piperazine aqueous solution and trimesoyl chloride n-hexane solution successively for reaction, and form polyamide active layer on the membrane surface. Wherein, through the use of dopamine, the interaction force between the base membrane and the polyamide active layer is increased, so that the support layer and the active layer are closely combined, so that the prepared nanofiltration membrane has good stability.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to a preparation method of a structurally stable cellulose flat nanofiltration membrane. Background technique [0002] Separation membrane plays a very important role in membrane technology, which can separate and treat organic matter, microorganisms, metal ions, etc. in wastewater, so as to achieve the effect of water purification. Among them, the membrane pores of the separation membrane are regulated by its preparation process. According to the pore size characteristics of the membrane, it can be divided into microfiltration, ultrafiltration, and nanofiltration. The substances filtered by different pore sizes are also different. Based on this, they are also used in different fields. The molecular weight cut-off of nanofiltration membrane is between 200~1000Da, and its pore size ranges from 1~10 nm. It can be effectively applied to remove heavy metals, reduce t...

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): B01D61/00B01D69/06B01D67/00
CPCB01D61/027B01D69/06B01D67/0006B01D2325/36
Inventor 汪东黄六莲林珊张慧曹石林马晓娟陈礼辉倪永浩李建国苗庆显
Owner FUJIAN AGRI & FORESTRY UNIV
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