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

Graphene oxide/PVDF (polyvinylidene fluoride) blended cation exchange membrane and preparation method thereof

A cation exchange membrane, ion exchange membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor dimensional stability, poor anti-pollution ability, poor chemical stability, etc., to improve surface performance. , The effect of improving hydrophilicity and surface densification

Inactive Publication Date: 2013-05-08
TONGJI UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are common problems in ion exchange membranes: low mechanical strength, poor dimensional stability, poor chemical stability, no acid and alkali resistance, poor anti-pollution ability and other shortcomings

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
  • Graphene oxide/PVDF (polyvinylidene fluoride) blended cation exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A graphene oxide / PVDF blend cation exchange membrane, the ion exchange membrane is made of raw materials with the following components and weight percentages: polyvinylidene fluoride (PVDF) 5, graphene oxide 0.3, organic solvent 70, diethylene Benzene 13, glycidyl methacrylate 10, benzoyl peroxide 1.7.

[0051] Among them, the molecular weight of polyvinylidene fluoride is 400,000 to 600,000 Daltons. Graphene oxide is in the form of flakes. The organic solvent is N-N dimethylacetamide.

[0052] A preparation method of graphene oxide / PVDF blended cation exchange membrane includes the following steps:

[0053] (1) Prepare materials according to the following components and weight percentages: polyvinylidene fluoride (PVDF) 5, graphene oxide 0.3, organic solvent 70, divinylbenzene 13, glycidyl methacrylate 10, benzoyl peroxide 1.7 ;

[0054] (2) Dissolve graphene oxide in 50wt% organic solvent, and ultrasonically disperse for 2h;

[0055] (3) Dissolve polyvinylidene fluoride in ...

Embodiment 2

[0063] A graphene oxide / PVDF blended cation exchange membrane, the ion exchange membrane is made of raw materials with the following components and weight percentages: polyvinylidene fluoride (PVDF) 10, graphene oxide 0.1, organic solvent 55, diethylene Benzene 14.4, glycidyl methacrylate 20, benzoyl peroxide 0.5.

[0064] Among them, the molecular weight of polyvinylidene fluoride is 400,000 to 600,000 Daltons. Graphene oxide is in the form of flakes. The organic solvent is N-N dimethylformamide.

[0065] A preparation method of graphene oxide / PVDF blend cation exchange membrane includes the following steps:

[0066] (1) Prepare materials according to the following components and weight percentages: polyvinylidene fluoride (PVDF) 10, graphene oxide 0.1, organic solvent 55, divinylbenzene 14.4, glycidyl methacrylate 20, benzoyl peroxide 0.5 ;

[0067] (2) Dissolve graphene oxide in 50wt% organic solvent, and ultrasonically disperse for 3h;

[0068] (3) Dissolve polyvinylidene fluori...

Embodiment 3

[0076] A graphene oxide / PVDF blended cation exchange membrane, the ion exchange membrane is made of raw materials with the following components and weight percentages: polyvinylidene fluoride (PVDF) 10, graphene oxide 1, organic solvent 60, diethylene Benzene 16, glycidyl methacrylate 12, benzoyl peroxide 1.

[0077] Among them, the molecular weight of polyvinylidene fluoride is 400,000 to 600,000 Daltons. Graphene oxide is in the form of flakes. The organic solvent is N-N dimethylacetamide.

[0078] A preparation method of graphene oxide / PVDF blend cation exchange membrane includes the following steps:

[0079] (1) Prepare materials according to the following components and weight percentages: polyvinylidene fluoride (PVDF) 10, graphene oxide 1, organic solvent 60, divinylbenzene 16, glycidyl methacrylate 12, benzoyl peroxide 1 ;

[0080] (2) Dissolve graphene oxide in 50wt% organic solvent, and disperse it ultrasonically for 2.5h;

[0081] (3) Dissolve polyvinylidene fluoride in 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
molecular weightaaaaaaaaaa
hydrophilicityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a graphene oxide / PVDF (polyvinylidene fluoride) blended cation exchange membrane and a preparation method thereof. The cation exchange membrane is prepared from the following components and raw materials in percentage by weight: 5-20% of polyvinylidene fluoride, 0.1-5% of graphene oxide, 50-70% of an organic solvent, 10-20% of divinyl benzene, 6-20% of glycidyl methacrylate, and 0.5-5% of benzoyl peroxide. The preparation method comprises the following steps: preparing membrane casting liquid firstly, preparing the membrane casting liquid into a base membrane by utilizing a tape casting method, cleaning the base membrane, and modifying the base membrane so as to obtain the cation exchange membrane. Compared with the prior art, the graphene oxide / PVDF blended cation exchange membrane prepared by using the method disclosed by the invention has the advantages that not only can the original excellent characteristics of PVDF cation exchange membranes be retained, but also the surface properties of PVDF cation exchange membranes are improved, the hydrophilicity, mechanical strength and acid and alkali resistances of membranes are enhanced, and the anti-pollution capacity of membranes is improved.

Description

Technical field [0001] The invention relates to a polymer organic membrane and a preparation method thereof, in particular to a graphene oxide / PVDF blended cation exchange membrane and a preparation method thereof. Background technique [0002] Ion membrane electrolysis is a new technology developed on the basis of ion exchange resin. The ion exchange membrane is used to selectively permeate anions and cations, allowing ions with one kind of charge to pass through but restricting the passage of ions with opposite charges to achieve the purpose of concentration, desalination, purification, purification and electrochemical synthesis. [0003] Ion exchange membrane is one of the main components of membrane electrolysis. It is a polymer membrane that contains ion groups and has selective permeability to ions in solution. Ion exchange membranes are mainly used in the fields of seawater desalination, purification of organic and inorganic substances. At present, ion exchange membranes g...

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 Applications(China)
IPC IPC(8): C08J7/16C08J5/18C08L27/16C08K7/00C08K3/04B01D71/34B01D69/02B01D67/00
Inventor 唐玉霖梁松
Owner TONGJI 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