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

Preparation method of acid-catalyzed COF self-assembled modified ultrafiltration membrane

A self-assembly, ultrafiltration membrane technology, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve problems such as loss, and achieve the effects of environmental friendliness, excellent anti-scaling performance and separation performance, and good application prospects.

Active Publication Date: 2021-06-25
QUANZHOU NORMAL UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an acid-catalyzed COF self-assembled modified ultrafiltration membrane and a preparation method thereof, which uses polymeric acid as a COF catalyst and membrane modifier, utilizes the porosity of COF to prevent acid from being lost from the membrane, and solves the problem of Solve the problem that acid is easily lost from the ultrafiltration membrane as a modifier, so that the obtained ultrafiltration membrane has excellent anti-scaling performance and separation performance

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
  • Preparation method of acid-catalyzed COF self-assembled modified ultrafiltration membrane
  • Preparation method of acid-catalyzed COF self-assembled modified ultrafiltration membrane
  • Preparation method of acid-catalyzed COF self-assembled modified ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an acid-catalyzed COF self-assembled modified ultrafiltration membrane comprises the following steps:

[0026] (1) Put 0.3g polyacrylic acid, 0.3g PVP, and 10g PVDF into 50ml dimethylacetamide respectively, and stir at 60°C to obtain a homogeneous solution;

[0027] (2) Add 0.05g of tricarbaldehyde and 0.03g of benzidine to the above homogeneous solution, stir and react overnight at room temperature to obtain a uniform and stable coating solution;

[0028] (3) After the obtained coating solution is left to stand, ultrasonically perform defoaming treatment, and then use a scraper to scrape the film on a clean glass plate. After standing for 2 minutes, put the glass plate into deionized water for phase inversion, and wait until the phase inversion is complete. Afterwards, soak in deionized water to remove residual solvent to obtain an ultrafiltration membrane.

Embodiment 2

[0030] A method for preparing an acid-catalyzed COF self-assembled modified ultrafiltration membrane comprises the following steps:

[0031] (1) Put 0.3g polylactic acid, 0.3g PVP, and 10g PVDF into 50ml dimethylacetamide respectively, and stir at 60°C to obtain a homogeneous solution;

[0032] (2) Add 0.05g of tricarbaldehyde and 0.03g of benzidine to the above homogeneous solution, stir and react overnight at room temperature to obtain a uniform and stable coating solution;

[0033] (3) After the obtained coating solution is left to stand, ultrasonically perform defoaming treatment, and then use a scraper to scrape the film on a clean glass plate. After standing for 2 minutes, put the glass plate into deionized water for phase inversion, and wait until the phase inversion is complete. Afterwards, soak in deionized water to remove residual solvent to obtain an ultrafiltration membrane.

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
anti-fouling rateaaaaaaaaaa
anti-fouling rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses an acid-catalyzed COF self-assembled modified ultrafiltration membrane and a preparation method thereof, and belongs to the technical field of organic hybrid separation. The preparation method comprises the following steps: dissolving polymer acid, a film substrate and PVP in an organic solvent to prepare a homogeneous solution, then sequentially putting aldehydes and amines for synthesizing COF into the homogeneous solution, and carrying out a stirring reaction to prepare a uniform and stable coating solution; and standing the coating solution, defoaming, casting the membrane, and finally preparing the required ultrafiltration membrane by using a non-solvent induced phase separation method. The obtained acid-catalyzed COF self-assembled modified ultrafiltration membrane can prevent the loss of acid during filtration, is environment-friendly and non-corrosive, and has high anti-scaling performance which can reach 90-99%; the acid-catalyzed COF self-assembled modified ultrafiltration membrane has good filtration and separation performance, has a bovine serum albumin rejection rate of 95% or more, can stably exist in air and water, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of organic hybrid separation, and in particular relates to an acid-catalyzed COF self-assembled modified ultrafiltration membrane and its preparation method and application. Background technique [0002] Acid-doped ultrafiltration membranes, especially polymeric acid-doped ultrafiltration membranes, are known for antifouling membrane applications and can be made by various processes. Ma Wenjing provides a polyacrylic acid (PAA) / tungsten oxide / polyacrylonitrile (PP / WO3 / PAN) composite membrane water purification method, which can achieve heavy metal treatment, oil-water separation, anti-fouling, etc. Patent CN 101007241A discloses a preparation process of polyacrylic acid / cellulose acetate (PAA / CA) composite membrane. In the preparation of PAA / CA pervaporation (PV) composite membrane, due to the crosslinking effect of ethylene glycol and aluminum nitrate on PAA And the thermal crosslinking of PAA is completed...

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): B01D67/00B01D69/02B01D61/14
CPCB01D67/0011B01D67/0009B01D69/02B01D61/145Y02A20/131
Inventor 徐文涛庄华强潘晓阳段训威
Owner QUANZHOU NORMAL UNIV