Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of hydrophilic self-cleaning oil-water separation membrane and preparation method thereof

An oil-water separation membrane and self-cleaning technology, applied in the field of membrane separation, can solve the problems that restrict the development and application of membrane separation technology, membrane surface pollution, separation flux and oil-water separation efficiency decline, so as to improve anti-pollution performance, improve affinity Water-based, non-draining effect

Active Publication Date: 2021-08-06
JIANGNAN UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional membrane separation materials are prone to severe membrane surface fouling during the oil-water separation process, which leads to a sharp drop in separation flux and oil-water separation efficiency, which seriously restricts the development and application of membrane separation technology in the field of oil-water separation.

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 hydrophilic self-cleaning oil-water separation membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dopamine modification: soak the polyvinylidene fluoride ultrafiltration membrane in a dopamine solution of 1 g / L and pH value of 8.5 for 15 minutes, self-assemble to form a polydopamine modification layer, take it out and wash it, and obtain a dopamine-modified polyvinylidene fluoride Ultrafiltration membrane;

[0024] (2) Quantum dot deposition: the dopamine-modified ultrafiltration membrane prepared in step (1) is immersed in a 0.01% graphene oxide quantum dot aqueous suspension for 10 min, and the graphene oxide quantum dot layer is deposited on the membrane surface by means of dopamine , to prepare quantum dot deposition film;

[0025] (3) In-situ cross-linking: the quantum dot deposition film prepared in step (2) is immersed in the MES buffer solution containing EDC and NHS, the pH value is 4, the total concentration of EDC and NHS is 0.01mol / L, EDC and NHS The molar ratio of NHS is 1:1, and the hydrophilic self-cleaning oil-water separation membrane is prepar...

Embodiment 2

[0027] (1) Dopamine modification: Soak the polyvinylidene fluoride ultrafiltration membrane in a 3g / L dopamine solution with a pH value of 8.5 for 25 minutes, self-assemble to form a polydopamine modification layer, take it out and wash it, and obtain a dopamine-modified polyvinylidene fluoride Ultrafiltration membrane;

[0028] (2) Quantum dot deposition: immerse the dopamine-modified ultrafiltration membrane prepared in step (1) into a 1.0% graphene oxide quantum dot aqueous suspension for 10 min, and deposit a graphene oxide quantum dot layer on the membrane surface by means of dopamine , to prepare quantum dot deposition film;

[0029] (3) In-situ cross-linking: the quantum dot deposition film prepared in step (2) is immersed in the MES buffer solution containing EDC and NHS, the pH value is 6.5, the total concentration of EDC and NHS is 0.1mol / L, EDC and NHS The molar ratio of NHS was 3:1, and the hydrophilic self-cleaning oil-water separation membrane was prepared after...

Embodiment 3

[0031] (1) Dopamine modification: Soak the polyvinylidene fluoride ultrafiltration membrane in a 3g / L dopamine solution with a pH value of 8.5 for 20 minutes, self-assemble to form a polydopamine modification layer, take it out and wash it, and obtain a dopamine-modified polyvinylidene fluoride Ultrafiltration membrane;

[0032] (2) Quantum dot deposition: the dopamine-modified ultrafiltration membrane prepared in step (1) is immersed in a 2% graphene oxide quantum dot aqueous suspension for 30 min, and the graphene oxide quantum dot layer is deposited on the membrane surface by means of dopamine , to prepare quantum dot deposition film;

[0033] (3) In-situ cross-linking: the quantum dot deposition film prepared in step (2) is immersed in the MES buffer solution containing EDC and NHS, the pH value is 5.5, the total concentration of EDC and NHS is 0.05mol / L, EDC and NHS The molar ratio of NHS is 1:1, and after an activation reaction at room temperature for 1 h, a hydrophilic...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a hydrophilic self-cleaning oil-water separation membrane and a preparation method thereof, belonging to the technical field of membrane separation. The base membrane of the hydrophilic self-cleaning oil-water separation membrane is a polyolefin porous membrane, and the graphene oxide quantum dots are assisted by dopamine to deposit on the surface of the base membrane, and after condensation reaction with dopamine, a hydrophilic modification layer of graphene oxide quantum dots is formed . Under visible light irradiation, graphene oxide quantum dots can degrade organic pollutants attached to the surface of the film and efficiently kill bacteria, making the film have excellent self-cleaning and antifouling properties; the film is suitable for a variety of oil-water layered mixtures and stable surface activity. The oil-in-water emulsion separates quickly, has good anti-pollution performance and cycle stability.

Description

technical field [0001] The invention relates to a hydrophilic self-cleaning oil-water separation membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] The continuous increase of industrial oily sewage and the frequent occurrence of marine oil spill accidents pose a great threat to the environment and human health. How to effectively treat oily wastewater, especially emulsified oily wastewater in complex environments, has become a problem of concern to the world. Membrane separation technology is a new type of high-efficiency separation technology. It has the advantages of no phase change and side reactions, no secondary pollution, high separation efficiency, mild operating conditions, and low energy consumption. It is widely used in seawater desalination, chemical industry, printing and dyeing, and environmental protection. , food, biochemical and other fields have been widely used. The use of memb...

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): B01D71/34B01D61/14B01D67/00C02F1/44C02F1/40
CPCB01D61/14B01D67/0079B01D71/34B01D2321/34B01D2325/36C02F1/40C02F1/44
Inventor 范加谊刘贝贝刘宇欣赵学志石进徐积斌张春芳
Owner JIANGNAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com