A kind of long-chain branched polysulfone anion membrane and preparation method thereof

An anion exchange membrane, long-chain technology, applied in the field of long-chain branched polysulfone anion membrane and its preparation, can solve the problems of increased water absorption, decreased membrane mechanical properties, etc., to reduce swelling, improve connectivity, high ionic The effect of conductivity

Active Publication Date: 2017-08-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the increase of functional groups, the water absorption rate will inevitably increase, and the mechanical properties of the membrane will decrease with the increase of water content.

Method used

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  • A kind of long-chain branched polysulfone anion membrane and preparation method thereof
  • A kind of long-chain branched polysulfone anion membrane and preparation method thereof
  • A kind of long-chain branched polysulfone anion membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Because the acylation reaction requires anhydrous reaction, various flasks and other instruments need to be evacuated under double-row tubes before the experiment. When evacuating, use an alcohol lamp to burn the flask. Pour in an inert gas such as nitrogen, and then evacuate, and reciprocate 2-3 times. Then, under the protection of nitrogen, add 1g of PSF solid and 40ml of dichloromethane (put into active molecular sieve one week in advance) to dissolve at room temperature. After dissolving, add 2ml of anhydrous tin tetrachloride, and then place the reaction in an ice-water bath. After 15 minutes, when the temperature drops to 3°C, mix 1ml of the acylating reagent 3-bromopropionyl chloride with 10ml of dichloromethane in In the normal pressure dropping funnel, under the protection of nitrogen, slowly drop the reaction solution. Because the acylation reaction will release hydrogen chloride gas, a bubbler is connected to the other outlet of the flask during the dropwise ...

Embodiment 2

[0030] The flask was evacuated under a double-row tube, and then under nitrogen protection, 1 g of PSF solid and 40 ml of dichloromethane (activated molecular sieves were put in one week in advance) were added to dissolve at room temperature. After dissolving, add 2ml of anhydrous tin tetrachloride, and then place the reaction in an ice-water bath. After 15 minutes, when the temperature drops to 3°C, mix 1ml of the acylating reagent 6-bromohexanoyl chloride with 10ml of dichloromethane in In the normal pressure dropping funnel, under the protection of nitrogen, slowly drop the reaction solution. Because the acylation reaction will release hydrogen chloride gas, a bubbler is connected to the other outlet of the flask during the dropwise addition, and then a rubber tube is connected to the water to absorb the gas generated by the reaction and ensure that the pressure in the flask is moderate. The dropwise addition was completed in 20 minutes. Then the ice-water bath was removed...

Embodiment 3

[0038] The flask was evacuated under a double-row tube, and then under nitrogen protection, 0.5 g of PSF solid and 15 ml of dichloromethane (activated molecular sieves were put in one week in advance) were added to dissolve at room temperature. After dissolving, add 2ml of anhydrous tin tetrachloride, and then place the reaction in an ice-water bath. After 15 minutes, when the temperature drops to 3°C, mix 2ml of the acylating reagent 6-bromohexanoyl chloride with 10ml of dichloromethane in In the normal pressure dropping funnel, under the protection of nitrogen, slowly drop the reaction solution. Because the acylation reaction will release hydrogen chloride gas, a bubbler is connected to the other outlet of the flask during the dropwise addition, and then a rubber tube is connected to the water to absorb the gas generated by the reaction and ensure that the pressure in the flask is moderate. The dropwise addition was completed in 20 minutes. Then the ice-water bath was remov...

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Abstract

The invention discloses a long-chain branched polysulfone anion membrane and a preparation method thereof. The membrane material structure is as follows: during preparation, it is completed through the steps of polysulfone acylation, carbonyl reduction, quaternization, film formation and alkalization. The polysulfone anion exchange membrane of the present invention is compared with the anion exchange membrane of traditional quaternization and re-functionalization, because the side chain contains long chain branches, the hydrophilic group is far away from the main chain of the polymer which is hydrophobic, and the membrane forming process is enhanced. The phase separation driving force improves the connectivity of ion channels in the membrane, thereby improving the hydroxide ion conductivity of the membrane; at the same time, the long alkyl side chain can significantly reduce the swelling degree of the quaternary ammonium salt membrane and reduce the water or OH‑ Nucleophile attack. The long-chain branched polysulfone anion membrane can obtain high ion conductivity under the premise of relatively low water absorption, which solves the long-standing contradiction faced by anion membranes.

Description

technical field [0001] The invention belongs to the technical field of alkaline anion exchange membranes, and relates to a long-chain branched polysulfone anion membrane and a preparation method thereof. Background technique [0002] As the environmental pollution becomes more and more serious, the fuel cell has entered people's eyes as a new type of green and efficient chemical energy, and the proton exchange membrane fuel cell has become a research topic due to its high energy conversion rate, environmental friendliness, and rapid start-up. One of the most mature fuel cells. However, its expensive noble metal catalyst has also become a key constraint for its large-scale commercialization. Compared with proton exchange membrane fuel cells, alkaline fuel cells have faster fuel oxidation and lower methanol permeability. The main advantage is that they can use non-noble metals such as Mn and Co as electrocatalysts, reducing their production costs. [0003] The common method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08J5/22H01M2/16H01M8/0239
CPCY02E60/50
Inventor 焉晓明胡玉涛贺高红阮雪华郑文姬曾薇潘昱
Owner DALIAN UNIV OF TECH
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