Graphene PVDF composite conductive ultrafiltration membrane as well as preparation and contaminant removing methods of ultrafiltration membrane

A composite conductive and graphene technology, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve the problems of low cleaning efficiency and achieve high cleaning efficiency and good conductivity

Active Publication Date: 2018-11-30
XIAN UNIV OF TECH
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide the removal method of above-mentioned graphene PVDF composite conductive ultraf

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 PVDF composite conductive ultrafiltration membrane as well as preparation and contaminant removing methods of ultrafiltration membrane
  • Graphene PVDF composite conductive ultrafiltration membrane as well as preparation and contaminant removing methods of ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] A preparation method of graphene PVDF composite conductive ultrafiltration membrane is as follows:

[0053] Step 1. Prepare copper foil with a thin layer of graphene attached

[0054] Step 1.1, select a piece of size 2×2cm 2 The copper foil of size is immersed in 30% hydrogen peroxide for 30 minutes, the reaction temperature is 60℃, the surface of the copper foil is oxidized, and the 200×200 matrix pits are uniformly etched on the copper oxide surface with a laser puncher, but the copper foil cannot be perforated . The area of ​​a single pit is about 1μm in diameter and the depth is about 5μm.

[0055] Step 1.2, put the copper foil prepared in step 1.1 in acetone for 5 minutes and then clean it with absolute ethanol three times to remove the organic matter on the surface of the copper foil and then take it out for ultrasonic washing in deionized water for 10 minutes to remove the organic solution used for cleaning, make sure The copper sheet is absolutely c...

Example Embodiment

[0073] Example 2

[0074] A preparation method of graphene PVDF composite conductive ultrafiltration membrane is as follows:

[0075] Step 1. Prepare a copper foil with a thin layer of graphene

[0076] Step 1.1, select a piece of size 2×2cm 2 The copper foil of size is immersed in 30% hydrogen peroxide for 30 minutes, the reaction temperature is 60℃, the surface of the copper foil is oxidized, and the 100×100 matrix pits are uniformly etched on the copper oxide surface with a laser puncher, but the copper foil cannot be perforated . The area of ​​a single pit is about 4μm in diameter and the depth is about 10μm.

[0077] Step 1.2: After immersing the treated copper foil in acetone for 5 minutes, it is cleaned 3 times with absolute ethanol, and then immersed in deionized water for ultrasonic treatment for 10 minutes.

[0078] Step 1.3, immerse the copper foil treated in step 1.2 in a 0.2mol / L hydrochloric acid solution for 2 minutes to remove the oxide layer on the surface of the copp...

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

No PUM Login to view more

Abstract

The invention discloses a graphene PVDF composite conductive ultrafiltration membrane and a preparation method thereof. The method comprises the following steps: a plurality of concave and convex pitpoints are etched on a surface of a copper foil by adopting a laser pore-forming technique, and a plurality of layers of graphene thin layers grow on the surface of the copper foil to form a graphenethin layer with defects; dimethylacetamide, polyvinylidene fluoride and polyvinylpyrrolidone are uniformly mixed to obtain a casting solution; and the casting solution uniformly coats the graphene thin layer of the copper foil, the whole copper foil is put into water, membrane formation is performed by phase inversion, the membrane-formed copper foil is put into a nitric acid solution, and after the copper foil is dissolved by nitric acid, the graphene PVDF composite conductive ultrafiltration membrane is obtained. The membrane disclosed by the invention comprises a PVDF supporting thin layer,the graphene thin layer adheres to the surface of the PVDF supporting thin layer, the graphene thin layer has the defects, the defects are pores, and hydrophilic functional groups is in the pores. The ultrafiltration membrane disclosed by the invention has good conductivity, and is cleaned by utilizing an electrochemical manner when being contaminated by a contaminant, wherein the cleaning efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of graphene ultrafiltration membranes, in particular to a graphene PVDF composite conductive ultrafiltration membrane, a preparation method of the ultrafiltration membrane, and a method for removing pollutants on the surface of the ultrafiltration membrane. Background technique [0002] As a commonly used method in the advanced treatment of water, ultrafiltration membranes have been widely used in the water treatment industry, but the membrane fouling caused by membrane surface adsorption and deposition resulting in smaller or clogged membrane pore sizes has always restricted the development of membrane technology. , while the conventional chemical cleaning has great damage to the membrane surface and the cleaning effect is very limited. Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms with sp2 hybrid orbitals forming a hexagonal honeycomb lattice. It has excellent optical, electric...

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): B01D71/34B01D67/00B01D61/14C02F1/44
CPCB01D61/145B01D67/0079B01D71/34C02F1/444
Inventor 张耀中王涛郑兴
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap