Check patentability & draft patents in minutes with Patsnap Eureka AI!

Polyvinylamine composite membrane and preparation method and application thereof

A technology of polyvinylamine and polyvinylamine layer, which is applied in the field of CO2 gas separation membrane and its preparation, can solve problems such as difficult to improve, achieve good separation performance, and increase the effect of carrier concentration

Active Publication Date: 2013-03-13
ENN SCI & TECH DEV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the carrier (amine-NH 2 group) concentration is certain, it is difficult to increase

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
  • Polyvinylamine composite membrane and preparation method and application thereof
  • Polyvinylamine composite membrane and preparation method and application thereof
  • Polyvinylamine composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] In one embodiment of the present invention, the preparation method of the present invention comprises the following steps:

[0043] 1. Basement membrane pretreatment: use a flat membrane made of polysulfone, polyethersulfone, polyacrylonitrile, polyimide, polyetherimide and other materials with a molecular weight cut-off of 5000-50,000 as the basement membrane, and cut the membrane into 130×150mm, immersed in pure water, soaked at room temperature for 20-24 hours, then dried at a temperature of 20°C-60°C and a relative humidity of 10%-70%, for 10h-15h, and set aside.

[0044] 2. Preparation of coating solution: Dissolve PVAm in pure water at a concentration of 1wt%-9wt%, and at the same time add fluorine-containing water-soluble salts (such as sodium fluoride, silver fluoride, ammonium fluoride, potassium fluoride, fluorine Cesium chloride, etc. are made into an aqueous solution at a concentration of 1wt%-30wt%, and the two are mixed according to the molar ratio of amin...

Embodiment 1

[0060] Prepare an aqueous solution of PVAm (for the synthesis process, refer to Fan Hui, Wang Jintang, Synthesis and Application of Polyvinylamine, Chemical Times, 2005, 19(10): 45), and make the mass concentration 2%. An aqueous solution of cesium fluoride CsF (Tianjin Guangfu Fine Chemical Research Institute) was blended therein, and mixed according to PVAm:CsF=1:1 (based on the molar ratio of amine group:fluorine). After magnetic stirring for 4 hours, it was filtered as a coating solution. Vacuumize the prepared coating solution in a vacuum oven for 24 hours for defoaming. Soak a 130×150mm polysulfone flat membrane (molecular weight cut-off 20,000) in pure water for 24 hours, then dry it in a constant temperature and humidity box (40°C, 30% relative humidity, dry for 6 hours), and fix it on a special aluminum plate with medical tape Then place it on the bottom plate of the manual film scraping machine, adjust the height of the scraper to 100 μm, use a dropper to evenly dro...

Embodiment 2

[0064]The aqueous solution of PVAm was prepared as in Example 1, and the mass concentration was 2%. An aqueous solution of cesium fluoride CsF was added thereto, and mixed so that PVAm:CsF=1:2 (in terms of molar ratio of amine group:fluorine). After magnetic stirring for 4 hours, it was filtered as a coating solution. Vacuumize the prepared coating solution in a vacuum oven for 24 hours for defoaming. Soak a 130×150mm polysulfone flat membrane (molecular weight cut off 20,000) in pure water for 24 hours, then dry it in a constant temperature and humidity chamber (40°C, 30% relative humidity, dry for 6 hours) and fix it on a special aluminum plate with medical tape Then place it on the bottom plate of the manual film scraping machine, adjust the height of the scraper to 100 μm, use a dropper to evenly drop the coating solution on the film surface, and push the scraper holder to move from one end of the flat film to the other end to complete the film scraping. The composite fi...

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
separation factoraaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyvinylamine composite membrane and a preparation method and application thereof. The polyvinylamine composite membrane comprises a basement membrane and a polyvinylamine layer serving as a separation layer, and fluorine-contained inorganic salt is blended in the polyvinylamine layer. According to the invention, the carrier concentration of CO2 in the membrane is improved by blending the fluorine-contained inorganic salt in a PVA (Polyvinylamine) matrix, and thus the obtained polyvinylamine composite membrane has good CO2 / CH4 separation performance.

Description

technical field [0001] The present invention relates to a CO 2 A gas separation membrane and a preparation method thereof, in particular, relate to a polyvinylamine composite membrane with a polyvinylamine membrane as a separation layer and a preparation method thereof. Background technique [0002] From some containing other gases (such as H 2 、CH 4 and N 2 ) Scale separation of CO from gas mixtures 2 It has become a chemical process with environmental protection, economy and importance. Membrane separation method has the advantages of simple device, convenient operation, less land occupation, low energy consumption, low cost and no pollution. It is a CO2 separation method with good application prospects. 2 Separation technology. [0003] Organic polymer membrane materials have a contradiction between permeability coefficient and permeability selectivity, and the permeability coefficient is low when the selectivity of the membrane is high. One of the ways to solve th...

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): B01D71/60B01D69/12B01D67/00B01D53/22
CPCY02C10/10Y02C20/40
Inventor 季鹏飞李红宾李永建张砚龙
Owner ENN SCI & TECH DEV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com