Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing UIO-66-NH2 nanofiltration membrane through normal-temperature in-situ growth

A uio-66-nh2, in-situ growth technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of difficult operation, low membrane flux, low retention rate and difficult industrial production , to achieve the effect of high rejection rate, simple operation and large flux

Pending Publication Date: 2021-12-07
ZHEJIANG NORMAL UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the current preparation process or method of MOFs nanofiltration membrane, there are problems such as difficult operation, low flux of the membrane, low rejection rate and difficulty in industrial production.

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
  • Method for preparing UIO-66-NH2 nanofiltration membrane through normal-temperature in-situ growth
  • Method for preparing UIO-66-NH2 nanofiltration membrane through normal-temperature in-situ growth
  • Method for preparing UIO-66-NH2 nanofiltration membrane through normal-temperature in-situ growth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for growing nanofiltration membranes in situ at room temperature, specifically comprising the following steps.

[0031] S1: Take an appropriate amount of 17g polyethersulfone and 76g N,N-dimethylacetamide to prepare a mixed solution;

[0032] It can be understood that in other embodiments, the polyethersulfone (PES) used can also be one of polyacrylonitrile (PAN), polysulfone (PSF), polyimide (PI), or can also be poly A combination of at least one of acrylonitrile (PAN), polyethersulfone (PES), polysulfone (PSF), and polyimide (PI).

[0033] And, N,N-dimethylacetamide can also be selected, polyvinylpyrrolidone (PVP), dimethylsulfoxide (DMSO) or, polypyrrolidone (PVP), dimethylsulfoxide (DMSO), N,N-di Combinations of at least one of methylacetamides;

[0034] S2: Add 7g of polyvinylpyrrolidone to the mixed solution to form a casting solution, and stir until completely dissolved;

[0035] S3: The basement membrane is prepared by submerging the phase inversion ...

Embodiment 2

[0052] In step S2, add 1g polyvinylpyrrolidone in the mixed solution, in step S4, ZrCl 4 Prepare the first solution with a concentration of 2mmol / 27ml, prepare the second solution of 10mmol / 35ml of aminoterephthalic acid, in step S6, immerse the first film in the second solution, let it stand for 24h, and the remaining steps Same as embodiment 1, obtain UiO-66-NH 2 Nanofiltration.

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 provides a method for preparing a UiO-66-NH2 nanofiltration membrane through normal-temperature in-situ growth, which comprises the following steps: preparing a 17% mixed solution from a polymer raw material and a solvent, and adding 1-7% of a pore-foaming agent into the mixed solution to prepare a membrane casting solution, wherein the pore-forming agent used is polyvinylpyrrolidone (PVP); preparing a base membrane from the membrane casting solution by adopting an immersed phase inversion method; dissolving ZrCl4 in a mixed solution of formic acid and ethanol to prepare a first solution with the concentration of 2mmol-10mmol / 27ml, and dissolving aminoterephthalic acid in a mixed solution of formic acid, pure water and ethanol to prepare a second solution with the concentration of 2mmol-10mmol / 35ml; immersing the base membrane in the first solution, standing, and volatilizing the solvent on the surface of the base membrane to obtain a first membrane; and immersing the first membrane in a second solution, standing, immersing the first membrane in absolute ethyl alcohol for 30 min and rinsing with deionized water for 5 min to obtain the UiO-66-NH2 nanofiltration membrane.The method is easy to operate, the flux of the membrane is large, the rejection rate is high, and industrial production is easy to achieve.

Description

technical field [0001] The invention relates to a method for preparing a film, specifically growing UiO-66-NH in situ at room temperature 2 Preparation of nanofiltration membranes. Background technique [0002] Nanofiltration membrane separation is an advanced material separation and purification technology. Because of its high efficiency, low energy consumption, and high single-pass separation, it is widely used in chemical, pharmaceutical, printing and dyeing, seawater desalination and other fields, especially because of its green environmental protection. , No physical and chemical changes in the separation process and other advantages are widely used in water treatment processes in the fields of industrial wastewater, medical wastewater and printing and dyeing wastewater. [0003] The in-situ growth method is one of the hot technologies for preparing nanofiltration separation membranes. This method refers to the process of directly immersing the carrier in the growth st...

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): B01D67/00B01D61/02
CPCB01D67/0013B01D61/027Y02A20/131
Inventor 徐艳超林红军李志文陶敏
Owner ZHEJIANG NORMAL UNIVERSITY