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

Renewable ultra-thin multi-layer composite forward osmosis membrane and its preparation method and application

A multi-layer composite, forward osmosis membrane technology, applied in the field of membrane separation, can solve the problems of poor affinity of amine monomer aqueous solution, prolong the membrane production process, increase the cost, etc., to improve the water flux, shorten the membrane production process, cost-increasing effect

Active Publication Date: 2021-08-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the affinity between the hydrophobic PE diaphragm and the aqueous solution of amine monomers polymerized by interfacial polymerization is very poor, and it is difficult to directly prepare the polyamide active layer on its surface through interfacial polymerization. The PE diaphragm must be pretreated to improve its hydrophilicity. It prolongs the film making process and increases the cost

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
  • Renewable ultra-thin multi-layer composite forward osmosis membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] As another aspect of the technical solution of the present invention, it also relates to a preparation method of a renewable ultra-thin multi-layer composite forward osmosis membrane, which includes:

[0027] (1) Make the PE microporous membrane fully contact with the oil phase solution containing the acid chloride monomer first, and then fully contact with the water phase solution containing the amine monomer after drying, and make the acid chloride monomer and the amine monomer in the The surface of the PE microporous membrane is subjected to interfacial polymerization and heat treatment to generate a micro-crosslinked polyamide layer to obtain a micro-crosslinked polyamide layer / PE microporous membrane;

[0028] (2) Make the micro-crosslinked polyamide layer / PE microporous membrane obtained in step (1) fully contact with the mixed solution containing polyphenolic compounds and cage polysilsesquioxane (POSS for short), and react to form crosslinking Hydrogel superhydr...

Embodiment 1

[0068] (1) Immerse the PE microporous membrane in n-hexane solution with a concentration of 0.1g / L trimesoyl chloride, take it out after soaking for 0.5min, brush off the surface liquid, and immerse it in an aqueous solution with a concentration of 0.1g / L m-phenylenediamine , take it out after reacting for 0.5min, and heat treatment at 30°C for 1min to form a slightly cross-linked polyamide layer;

[0069] (2) Submerge the membrane prepared in step (1) in a mixed aqueous solution composed of 0.2g / L catechol and 0.2g / L POSS, take it out after 0.5h, and wash to obtain a superhydrophilic hybrid layer;

[0070] (3) Immerse the membrane prepared in step (2) in an aqueous solution of 0.01g / L ferric chloride, take it out after 0.5h, wash it, heat it in a microwave at 300°C for 10s, take it out, wash it, and obtain an adsorption catalytic functional layer, Obtain a renewable ultra-thin multi-layer composite forward osmosis membrane.

[0071] After testing, when the forward osmosis me...

Embodiment 2

[0073] (1) Immerse the PE microporous membrane in an acetone solution with a concentration of 50g / L terephthaloyl dichloride, take it out after soaking for 30 minutes, brush off the surface liquid, and immerse it in an aqueous solution with a concentration of 100g / L o-phenylenediamine, and react for 30 minutes After taking it out, heat treatment at 90°C for 30 minutes to form a slightly cross-linked polyamide layer;

[0074] (2) Submerge the membrane prepared in step (1) in a mixed aqueous solution composed of 10g / L dopamine and 10g / L POSS, take it out after 48h, and wash to obtain a superhydrophilic hybrid layer;

[0075] (3) Immerse the membrane prepared in step (2) in an aqueous solution of 10g / L cobalt chloride, take it out after 48 hours, wash it, heat it in microwave at 100°C for 600s, take it out, wash it, and obtain an adsorption catalytic functional layer, and obtain a renewable Ultra-thin multi-layer composite forward osmosis membrane.

[0076] After testing, when t...

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
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a reproducible ultra-thin multi-layer composite forward osmosis membrane, a preparation method and application thereof. The forward osmosis membrane comprises a PE microporous support layer, a micro-crosslinked polyamide layer, a superhydrophilic hybrid layer and an adsorption catalytic function layer. The preparation method comprises: making the acid chloride monomer and the amine monomer carry out interfacial polymerization reaction on the surface of the PE microporous membrane and heat-treating to generate a micro-crosslinked polyamide layer; The mixed solution of oxane reacts to form a superhydrophilic hybrid layer, and fully contacts with the metal compound aqueous solution, and then microwaves heat to reduce metal ions to form an adsorption catalytic function layer. The concentration polarization of the PE microporous support membrane of the present invention is not significant, the solute rejection rate of the micro-crosslinked polyamide layer is high, the water molecule penetration resistance of the super-hydrophilic hybrid layer is weak, and the adsorption and catalytic functional layer can remove pollutants Strong capacity, high performance, renewable forward osmosis membrane can be obtained, which can realize seawater desalination, sewage purification, catalytic degradation of pollutants, etc.

Description

technical field [0001] The invention relates to a forward osmosis membrane, in particular to a reproducible ultra-thin multilayer composite forward osmosis membrane and a preparation method thereof, as well as the application of the forward osmosis membrane, belonging to the technical field of membrane separation. Background technique [0002] Composite forward osmosis membranes are currently the most widely studied forward osmosis membranes, usually including classic ultrafiltration base membranes such as polysulfone (PSf) and polyethersulfone (PES) prepared by non-solvent-induced phase separation, polyethers prepared by interfacial polymerization, etc. Amide active layer. At present, the classic ultrafiltration basement membrane is usually thick (usually greater than 50 µm), low porosity (surface porosity is only 0.3 ~ 1.3%), membrane pores are curved (sponge-like pores at the top), and the inner concentration difference is extremely high. phenomenon is serious. Moreover...

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): B01D71/76B01D71/56B01D71/26B01D71/02B01D69/12B01D61/00C02F1/44
CPCB01D61/002B01D69/125B01D71/022B01D71/26B01D71/56B01D71/76B01D2325/36C02F1/445C02F2103/08Y02A20/131
Inventor 朱丽静曾志翔宋海明张文辉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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