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

Covalent organic skeleton material-doped alcohol perm-selective membrane and preparation method thereof

A covalent organic framework and alcohol-preferred technology, applied in the field of membrane separation, can solve problems such as particle gap defects, affecting membrane performance, interface defects, etc., and achieve high flux, low density, and high selectivity.

Active Publication Date: 2017-02-15
BEIJING UNIV OF TECH
View PDF5 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems of the organic / inorganic hybrid preferential alcohol permeation composite membrane developed in recent years are (H.Vinh-Thang, and S.Kaliaguine, Chem.Rev., 2013, 113, 4980–5028.): (1) Due to the presence of inorganic components in these filler particles such as carbon black, activated carbon, silicon oxide, carbon molecular sieve, zeolite molecular sieve and metal-organic framework materials, there are problems of poor compatibility with organic polymers, and even interface defects; (2) Particle interstitial defects caused by serious agglomeration and poor dispersion of filler particles in the hybrid separation layer affect the performance of the membrane; (3) these organic / inorganic hybrid membranes that have been reported preferentially permeate alcohol membranes, and it is still difficult to take into account high performance at the same time. Throughput and high selectivity

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
  • Covalent organic skeleton material-doped alcohol perm-selective membrane and preparation method thereof
  • Covalent organic skeleton material-doped alcohol perm-selective membrane and preparation method thereof
  • Covalent organic skeleton material-doped alcohol perm-selective membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] In a second aspect, an embodiment of the present invention provides a method for preparing the above-mentioned composite membrane, including:

[0042] Step a. Dissolve a certain amount of high molecular polymer into the solvent, stir evenly, add a certain amount of covalent organic framework material, and ultrasonically disperse it evenly; then add a certain amount of high molecular polymer crosslinking agent and catalyst , prepared as a covalent organic framework material / polymer blend membrane solution;

[0043] Step b. Immerse the pretreated porous base membrane in the covalent organic framework material / polymer blended membrane liquid, take it out after standing for a period of time, and fix it on the membrane stage, so that it can be The film carrier rotates at a constant speed; while rotating, the surface temperature of the basement film is 50-80°C, and the volatilization of the solvent on the surface of the basement film is accelerated;

[0044] Step c. Perform ...

Embodiment 1

[0058] The porous base membrane is polysulfone (PSf) flat-plate ultrafiltration membrane, the molecular weight cut-off is 20000, the high molecular polymer used is PDMS (viscosity is 20000mPa s), the solvent is n-heptane, and the high-temperature baking lamp selected is Yuba heating lamp .

[0059] Preparation method and steps:

[0060] Step a. Dissolve 10wt.% PDMS into 100mL n-heptane, stir for 1 hour and then add covalent organic framework material COF-42. The loading capacity of COF-42 is 0.25wt.% of the polymer. Ultrasound for 30 minutes to make it fully mixed Evenly, then add 1wt.% ethyl orthosilicate and 0.05wt.% dibutyltin dilaurate, continue to stir for 0.5h, and prepare a COF-42 / PDMS mixed membrane solution;

[0061] Step b. Under the condition that the ambient humidity is 20% lower, cut the pretreated PSf base film into a disc with a diameter of 20 cm and immerse it in the COF-42 / PDMS mixed film solution described in step a), take it out after standing for 1 min, an...

Embodiment 2

[0067] The porous base membrane is polysulfone (PSf) flat-plate ultrafiltration membrane, the molecular weight cut-off is 20000, the high molecular polymer used is PDMS (viscosity is 20000mPa s), the solvent is n-heptane, and the high-temperature baking lamp selected is Yuba heating lamp .

[0068] Preparation method and steps:

[0069] Step a. Dissolve 10wt.% PDMS into 100mL n-heptane, stir for 1 hour and then add covalent organic framework material COF-42. The loading of COF-42 is 0.5wt.% of the polymer, and ultrasonically mix for 30 minutes. Evenly, then add 1wt.% ethyl orthosilicate and 0.05wt.% dibutyltin dilaurate, continue to stir for 0.5h, and prepare a COF-42 / PDMS mixed membrane solution;

[0070] Step b. Under the condition that the ambient humidity is 20% lower, cut the pretreated PSf base film into a disc with a diameter of 20 cm and immerse it in the COF-42 / PDMS mixed film solution described in step a), take it out after standing for 1 min, and Fix it on a vertica...

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 sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a covalent organic skeleton material-doped alcohol perm-selective membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The covalent organic skeleton material-doped alcohol perm-selective membrane comprises a porous base membrane and a covalent organic skeleton material-doped macromolecule polymer selective separation layer bound on the porous base membrane surface. The concrete method comprises: dissolving a macromolecule polymer, a covalent organic skeleton material, a cross-linking agent of the macromolecule polymer and a catalyst in a solvent to prepare a covalent organic skeleton material / macromolecule polymer blending membrane liquid; immersing a pre-treated porous base membrane in the covalent organic skeleton material / macromolecule polymer blending membrane liquid, standing for a certain time, taking out, and fixing on a membrane carrying table rotating at a uniform speed; and carrying out high temperature vulcanization after the solvent on the base membrane surface is heated and is completely volatilized so as to obtain the covalent organic skeleton material-doped alcohol perm-selective membrane. According to the present invention, the prepared covalent organic skeleton material-doped alcohol perm-selective membrane has the high alcohol permeation performance in the permeation vaporization manner.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a composite membrane doped with a covalent organic framework material preferentially permeable to alcohol and a preparation method thereof. Background technique [0002] Pervaporation preferred permeation membrane technology is a new type of membrane separation process. Because of its advantages of high efficiency, energy saving, and environmental protection, it is expected to replace the traditional high-energy distillation process and play an important role in the in-situ separation of bioalcohol and the improvement of fermentation efficiency. effect. [0003] However, unlike the pervaporation membrane technology that preferentially permeates water, the current development of pervaporation membrane technology that preferentially permeates alcohol is limited by the lack of membrane materials that preferentially permeate alcohol with both high flux and hig...

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): B01D69/12B01D67/00
Inventor 张国俊范红玮
Owner BEIJING 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