Preparation method of assembled membrane based on triazine porous organic nano particles

A nanoparticle assembly and nanoparticle technology, applied in the field of membrane separation, can solve problems such as poor solvent dispersion, poor interlayer force, and thick separation layer, and achieve the effects of simple preparation method, good stability, and high permeability selectivity

Active Publication Date: 2020-11-13
ZHEJIANG UNIV OF TECH
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most porous organic polymers are solid powders that are insoluble and insoluble, and their solvent dispersibility is poor, so it is difficult to directly prepare films
At present, the preparation methods of porous organic polymer separation membranes mainly include blend coating, interfacial polymerization, and in-situ growth, etc., but there are still problems such as thick separation layer, special support layer and poor interlayer force (Chem. Eur. J, 2016, 22, 4695–4699; J. member.sci, 2018, 566, 197-204; Angew. Chem. Int. Ed, 2018, 57, 4083–4087)

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 assembled membrane based on triazine porous organic nano particles
  • Preparation method of assembled membrane based on triazine porous organic nano particles

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The method for preparing a membrane based on triazine porous organic nanoparticles assembly described in this embodiment comprises the following steps:

[0022] 1) Add 0.05 to 1.0 parts by mass of triazine derivatives to 25 to 500 parts by mass of acetic acid aqueous solution, stir thoroughly to dissolve it; then add 0.2 to 1.2 parts by mass of 1,2-dicarbonyl The compound and 0.05-0.6 parts by mass of aldehyde compounds are reacted at 60-120° C. for 12-72 hours to obtain a triazine-based porous organic nanoparticle dispersion;

[0023] 2) Add 0.01 to 1.0 parts by mass of the above-mentioned triazine porous organic nanoparticle dispersion and 0.005 to 0.05 parts by mass of cationic polyelectrolyte to 200 to 600 parts by mass of water to prepare a mixed and diluted dispersion, and after ultrasonic treatment, Perform pressure filtration on the surface of the porous support membrane to form a membrane; then immerse the above-mentioned assembled membrane in the aqueous solut...

Embodiment 1

[0027] Add 0.05 g of 2,4,6-tris(4-aminophenyl)-1,3,5-triazine into 25 g of 10% acetic acid aqueous solution, and stir magnetically at 500 rpm for 1 hour to dissolve; Then add 0.2g aceguvaldehyde and 0.05g formaldehyde to the above solution, and react at 60°C for 72 hours to obtain a dispersion of triazine porous organic nanoparticles; mix 0.01g of the above dispersion of triazine porous organic nanoparticles and 0.005g Polysaccharides were added to 200g water to prepare a mixed and diluted dispersion. After ultrasonication at 28KHZ for 15 minutes, the above mixed and diluted dispersion was filtered on the surface of a polysulfone ultrafiltration membrane under an operating pressure of 0.05Mpa; Dialdehyde aqueous solution, cross-linking reaction at 15° C. for 2 hours, take out and remove the residual aqueous solution on the surface of the membrane, wash with deionized water, and obtain a triazine-based porous organic nanoparticle assembly membrane.

[0028] Triazine porous orga...

Embodiment 2

[0030] Add 1 g of 2,4,6-tris(4-aminophenyl)-1,3,5-triazine into 500 g of 50% acetic acid aqueous solution, stir magnetically at 1500 rpm for 3 hours to dissolve it; then Add 1.2g aceglyoxal and 0.6g formaldehyde to the above solution, and react at 120°C for 12 hours to obtain a triazine porous organic nanoparticle dispersion; 1g of the above triazine porous organic nanoparticle dispersion and 0.05g chitosan Add it to 600g of water to prepare a mixed and diluted dispersion. After ultrasonication at 40KHZ for 5 minutes, filter the above mixed and diluted dispersion on the surface of polysulfone ultrafiltration membrane under the operating pressure of 0.20Mpa; then immerse the obtained membrane in 2% glutaraldehyde In the aqueous solution, the cross-linking reaction was carried out at 35°C for 0.5 hours, the residual aqueous solution on the surface of the membrane was taken out and removed, and after washing with deionized water, the assembled membrane based on triazine porous org...

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 preparation method of an assembled membrane based on triazine porous organic nano particles. The preparation method comprises the following steps: taking a triazine derivative, a 1,2-dicarbonyl compound and an aldehyde compound as reaction monomers, preparing triazine porous organic nano particles in an acetic acid aqueous solution through a Debus-Radziszewski reaction; mixing the triazine porous organic nano particles with cationic polyelectrolyte to prepare dispersion liquid, and preparing the assembled membrane based on triazine porous organic nano particles on thesurface of a porous support membrane through a pressurized deposition filtration-chemical crosslinking method. The prepared assembled membrane has an efficient dye desalination performance and good stability, and can be applied to the application fields of dye purification, wastewater treatment and the like.

Description

technical field [0001] The invention belongs to the field of membrane separation, and in particular relates to a method for preparing a membrane based on triazine porous organic nanoparticle assembly. Background technique [0002] As a high-efficiency separation technology, membrane separation has been widely used in food, medicine, chemical industry, water treatment and other fields due to its advantages of low energy consumption, environmental friendliness, and simple operation process, and has become one of the most important means in today's separation science. . So far, separation membranes are mainly made of polymers such as polyimide (PI), polyamide (PA), polyacrylonitrile (PAN), polyethersulfone (PES), polysulfone (PSF), polyvinylidene fluoride (PVDF) etc. However, due to the lack of ordered and controllable porous structure of the above-mentioned polymers, the resulting membranes usually have uneven pore size and low porosity, making it difficult to achieve efficie...

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): B01D65/10B01D69/12B01D67/00C02F1/44C02F101/34C02F101/38
CPCB01D65/10B01D69/12B01D69/125C02F1/442C02F1/444B01D2325/02C02F2101/38C02F2101/40C02F2101/34Y02A20/131
Inventor 计艳丽刘壮壮叶润峰高从堦
Owner ZHEJIANG 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