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

Polyether sulfone containing side group as well as preparation method and application thereof in gas separation membrane

A gas separation membrane, polyethersulfone technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation and other directions, can solve the problems of low permeability and unsatisfactory separation membrane performance, achieve high thermal stability, high The effect of heat resistance

Inactive Publication Date: 2011-09-07
JILIN UNIV
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyethersulfone has been widely used in industry as a gas separation membrane material. The permeability of this type of separation membrane is low and unsatisfactory.

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
  • Polyether sulfone containing side group as well as preparation method and application thereof in gas separation membrane
  • Polyether sulfone containing side group as well as preparation method and application thereof in gas separation membrane
  • Polyether sulfone containing side group as well as preparation method and application thereof in gas separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 10.8065g (0.05mol) of 3-methoxyphenylhydroquinone, 14.3580g (0.05mol) of 4,4'-dichlorodiphenylmethyl sulfone and 7.59g of anhydrous potassium carbonate, 100ml sulfolane, 40ml toluene Put it into a three-neck flask equipped with mechanical stirring and a water dispenser, raise the temperature to the reflux of the azeotropic dehydrating agent under the protection of nitrogen, react for 2.5 hours, remove toluene, and raise the temperature to 210-220°C to continue the reaction for 4 hours. The obtained polymer was precipitated in deionized water, pulverized, washed, and dried to obtain a white powder of polyethersulfone containing methoxy side groups. The glass transition temperature measured by DSC is 168°C, and the initial decomposition temperature measured by TGA is 452°C. The polymer structure is shown in the figure below:

[0032]

[0033] n=10-200.

[0034] The polyethersulfone polymer containing methoxyl side groups is paved into a dense membrane, and the membra...

Embodiment 2

[0036] Add 15 g of polyethersulfone containing methoxy side groups prepared by the method in Example 1 into the pyridine hydrochloride solution prepared from 360 ml of pyridine and 400 ml of concentrated hydrochloric acid, and react at 170° C. for 12 hours under nitrogen protection. The obtained polymer was precipitated in a large amount of ice water, filtered, washed and dried. An off-white polyethersulfone powder containing hydroxyl side groups was obtained. The glass transition temperature is 209°C, and the initial decomposition temperature measured by TGA is 480°C. The structure is as follows:

[0037]

[0038] Wherein n=10~180.

[0039] The polyethersulfone polymer containing hydroxyl side groups is paved into a dense membrane, and the membrane permeability P(O 2 ) = 0barrer, P(N 2 )=0.015barrer, selectivity α(O 2 / N 2 )=0.

Embodiment 3

[0041] By the polyethersulfone 1g (2.4012mmol) that contains hydroxyl side group that makes in the embodiment 2, the anhydrous potassium carbonate of 0.1657g, 2.7079g (12.006mmol) 2-chloro-5-nitrobenzotrifluorotoluene, 25ml N , N-dimethylacetamide (DMAc), 15ml toluene is put into the 100ml there-necked bottle that is equipped with mechanical stirring and belt water device, is heated up to azeotropic dehydrating agent reflux under nitrogen protection, reacts for 2 hours, gets rid of azeotropic dehydrating agent , and the temperature was raised to 160° C. to continue the reaction for 4 hours. The obtained polymer was precipitated in de-ethanol, pulverized, washed, and dried to obtain a white polyethersulfone powder containing trifluoromethyl side groups. The glass transition temperature was 171°C as measured by DSC, and the initial decomposition temperature as measured by TGA was 420°C. The polymer structure is shown in the figure below:

[0042]

[0043] n=10-160.

[0044...

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
Glass transition temperatureaaaaaaaaaa
Initial decomposition temperatureaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to polyether sulfone containing a side group as well as a preparation method and application thereof in a gas separation membrane, belonging to the technical field of high molecular materials and synthesis thereof. The polyether sulfone containing the side group is polyether sulfone containing a methoxy side group, polyether sulfone containing a hydroxyl side group, polyether sulfone containing a trifluoromethyl side group and polyether sulfone containing a benzophenone side group. In the preparation method, the polyether sulfone containing the hydroxyl side group is mainly used as a basis for carrying out nucleophilic substitution reaction with a monomer containing lively halogen to obtain a series of polyether sulfone polymers containing large-volume side groups. The polyether sulfone polymer containing the side group is prepared into a solution, and the gas separation membrane is prepared by adopting a flat flowing membrane laying or scraper scraping membrane forming method. The polyether sulfone material containing the side group has high heat stability, favorable membrane forming performance and higher permeability and selectivity on gases.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials and their synthesis, in particular to four polyethersulfone polymers containing side groups and the preparation of gas separation membranes by using them. Background technique [0002] Polysulfone material is a kind of membrane material widely used, and it is a hot spot in membrane material research. Polysulfone resin is a kind of polymer compound containing sulfone group and aromatic ring in the main chain, mainly bisphenol A polysulfone, polyarylsulfone, polyethersulfone, polyphenylene sulfide sulfone and so on. It can be seen from the structure that there are benzene rings on both sides of the sulfone group to form a conjugated system. Since the sulfur atom is in the highest oxidation state, the two sides of the sulfone group are highly conjugated, so it has excellent oxidation resistance, thermal stability and high temperature melting. stability. [0003] Polyethersulfone ha...

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): C08G75/23C08J5/18C08L81/06B01D71/68B01D53/22
Inventor 刘佰军刘壮姜振华
Owner JILIN UNIV
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