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

A preparation method of GO-type nanofiltration membrane based on nanogel regulation of graphene oxide layer spacing

A nanogel and nanofiltration membrane technology, applied in the field of separation membranes, can solve the problems of limited effective utilization and achieve excellent separation performance, large effective pore size, excellent temperature and pH response performance

Active Publication Date: 2022-01-14
ZHEJIANG UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene oxide films with unchangeable interlayer spacing severely limit its effective utilization

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 preparation method of GO-type nanofiltration membrane based on nanogel regulation of graphene oxide layer spacing
  • A preparation method of GO-type nanofiltration membrane based on nanogel regulation of graphene oxide layer spacing
  • A preparation method of GO-type nanofiltration membrane based on nanogel regulation of graphene oxide layer spacing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the preparation method of the nanofiltration membrane based on nanogel regulation of graphene oxide layer spacing is as follows:

[0038] (1) Synthesis of P(NIPAM-MAA) nanogel: 0.565g N-isopropylacrylamide (NIPAM), 0.431g methacrylic acid (MAA), 0.077g cross-linking agent N,N-methylenebis Add acrylamide (MBA), 0.012mmol surfactant sodium dodecyl sulfate (SDS) and 450mL deionized water into a three-necked flask, and stir until it is completely dissolved. Then 0.068 g of ammonium persulfate (APS) was added. Under nitrogen protection, react at 75°C for 4 hours to obtain a nanogel suspension, then repeatedly centrifuge / disperse the nanogel suspension to remove residual unreacted components, and obtain P(NIPAM-MAA) after lyophilization nanogel.

[0039] The preparation method of the P(NIPAM-MAA) nanogel described in the present invention can be scaled up. Said NIPAM, MBA, MAA and SDS are respectively 11.1mmol / L, 1.11mmol / L and 11.1mmol / L in deionized w...

Embodiment 2

[0049] In this embodiment, the preparation method and process steps of the nanofiltration membrane based on nanogel regulation and control of graphene oxide interlayer spacing are the same as in Example 1, the only difference is that in step (4) P (NIPAM-MAA) nanogel The mass ratio to graphene oxide (GO) is 1:1. Wherein the concentration of GO in the solution is 25mg / L, and the concentration of P(NIPAM-MAA) nanogel is 25mg / L. The resulting smart switch membranes are labeled membranes GON1-6. The temperature-responsive water flux and switching coefficient of membrane GON1-6 are detailed in the appendix Figure 8 , the pH-responsive water flux and switching coefficient of membrane GON1-6 are detailed in the appendix Figure 9 .

Embodiment 3

[0051] In this embodiment, the preparation method and process steps of the nanofiltration membrane based on nanogel regulation and control of graphene oxide interlayer spacing are the same as in Example 1, the only difference is that in step (4) P (NIPAM-MAA) nanogel The mass ratio to graphene oxide (GO) is 3:1. Wherein the concentration of GO in the solution is 25mg / L, and the concentration of P(NIPAM-MAA) nanogel is 75mg / L. The resulting smart switch membrane is labeled membrane GON3-6. The temperature-responsive water flux and switching coefficient of membrane GON3-6 are detailed in the appendix Figure 8 , the pH-responsive water flux and switching coefficient of membrane GON3-6 are detailed in the appendix Figure 9 .

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a GO-type nanofiltration membrane based on a nanogel to regulate the interlayer spacing of graphene oxide. The preparation method comprises the following steps: (1) preparing P(NIPAM-MAA) nanogels with temperature and pH responsive properties; (2) preparing the prepared P(NIPAM-MAA) nanogels and graphene oxide according to Proportionally dispersed in ultrapure water, wherein the mass ratio of P(NIPAM‑MAA) nanogel and graphene oxide is not greater than 10, to obtain a uniformly dispersed solution of nanogel and GO; subsequently, P(NIPAM‑MAA) is made ) nanogels and GO were self-assembled on the polyethersulfone ultrafiltration bottom membrane, in which P(NIPAM‑MAA) nanogels were uniformly dispersed between the GO sheets to prepare GO-type nanofiltration membranes. The preparation method of the present invention uses nanogels with temperature and pH responses to regulate the layer spacing of graphene oxide, and prepares GO membranes with adjustable apertures. The GO nanofiltration membranes have excellent temperature and pH response properties, High water flux and excellent separation performance for the selective separation of small molecules with a molecular weight of 300‑1000.

Description

technical field [0001] The invention belongs to the technical field of separation membranes, and in particular relates to a preparation method of a GO nanofiltration membrane with stimulus response performance. Background technique [0002] Membrane separation technology has been widely used in seawater desalination, chemical / biological separation, energy recovery, and wastewater / waste gas treatment due to its outstanding advantages such as high efficiency, high energy consumption, and simple operating equipment. Separation membranes are usually pore sizes with specific dimensions (nanofiltration and ultrafiltration membranes) or functional exchange groups (ion exchange membranes). These membranes allow the preferential passage of certain components, thereby enabling the separation of different components. At present, the membrane technologies used in the field of water treatment mainly include microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis...

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): B01D71/68B01D69/02B01D67/00
CPCB01D71/68B01D69/02B01D67/0079B01D2325/02
Inventor 沈江南刘华文高从堦
Owner ZHEJIANG UNIV OF TECH
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