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Preparation method of side chain crosslinked polymer and side chain crosslinked polymer anion exchange membrane of side chain crosslinked polymer

An anion exchange membrane and side chain cross-linking technology, which is applied in the field of preparation of side chain cross-linked polymers and side chain cross-linked polymer anion exchange membranes, can solve the problem that the dimensional stability of ion conductivity is not very good Improvement and other issues, to achieve the effect of controllable ion exchange capacity, simple synthesis process, and high ion conductivity

Inactive Publication Date: 2012-12-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the same problem is that when the IEC level reaches a certain level, the ionic conductivity and dimensional stability of this type of membrane material in water are still not well improved.

Method used

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  • Preparation method of side chain crosslinked polymer and side chain crosslinked polymer anion exchange membrane of side chain crosslinked polymer
  • Preparation method of side chain crosslinked polymer and side chain crosslinked polymer anion exchange membrane of side chain crosslinked polymer
  • Preparation method of side chain crosslinked polymer and side chain crosslinked polymer anion exchange membrane of side chain crosslinked polymer

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preparation example Construction

[0050] The preparation method of the side chain cross-linked polyethersulfone anion exchange membrane involved in the present invention, by adjusting the aromatic dihydric phenol (II) with the side chain chloromethylation reactive group and the non-reactive group The ratio of aromatic dihydric phenol (III) can be used to change the rigidity of the polymer main chain and the length of the chain segment, and the degree of chloromethyl substitution of the polymer can be controlled by changing the amount of Friedel-Crafts reaction catalyst, reaction temperature and time. Based on the structure of the group dihalide (I) and aromatic dihydric phenol (III), different types of chloromethylated polyethersulfone polymers (CMPES) were obtained through polymerization and Friedel-Crafts reactions; and then different types of CMPES The film is cast, and an anion exchange membrane is formed by changing the structure of the tertiary diamine crosslinking agent (IV) and the molar ratio with chlo...

Embodiment 1

[0091] Embodiment 1: Preparation of side chain cross-linked quaternized anion exchange membrane QPES(2 / 1)-TMPDA

[0092] Preparation of PES (2 / 1) polymer: Add 1.524g of DFDPS (6mmol) in a completely dry four-neck flask equipped with nitrogen inlet and outlet devices, oil-water separator, and separatory funnel under nitrogen protection , 18 mL of NMP, 1.401 g of BHPF (4 mmol), 0.672 g of HFBPA (2 mmol), 0.954 g of potassium carbonate (6.9 mmol), and 18 mL of toluene. Slowly ramp up to 140 o C was refluxed for 4h, and the moisture generated by the reaction was removed in the form of toluene / water azeotrope. Then the temperature is slowly raised to 170 o C, keep the temperature constant for 6h. After the reaction was over, the heating was stopped and cooled to room temperature. The product was slowly poured into about 500 mL of deionized water, and a white fibrous polymer product was precipitated. The product was thoroughly washed with deionized water at 80 o C dried in a v...

Embodiment 2

[0096] Example 2: Preparation of side chain cross-linked quaternized anion exchange membrane QPES(2 / 1)-TMEDA

[0097] Similar to the preparation method of QPES(2 / 1)-TMPDA in Example 1, the difference is that the aromatic dihalide monomer in Example 2 is changed to 4,4'-dichlorodiphenyl sulfone, tertiary di The amine monomer TMPDA was changed to TMEDA.

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Abstract

The invention discloses a preparation method of a side chain crosslinked polymer and a side chain crosslinked polymer anion exchange membrane of the side chain crosslinked polymer. The invention mainly comprises the steps of the preparation of a polyether sulfone polymer precursor, the preparation of a chloromethyl ether sulfone polymer and the preparation of the side chain crosslinked polymer anion exchange membrane. The preparation process provided by the invention has the advantages of simplicity, and controllable ion exchange capacity and degree of crosslinking. Compared with the existing non-crosslinked membrane, the membrane prepared by the method provided by the invention has the advantages of uniform structure, good stability of size and high ion conductivity under a lower IEC (ion-exhange column chromatography) level.

Description

technical field [0001] The invention belongs to the field of anion-exchange membrane preparation, in particular to a side-chain cross-linked polymer and a method for preparing the side-chain cross-linked polymer anion-exchange membrane. Background technique [0002] Quaternized polymer membranes are widely used in fuel cells, chlor-alkali industry, ion exchange resins, membrane separation technology, and humidity sensors. [0003] In the alkaline direct methanol fuel cell, the alkaline anion exchange membrane is one of the key components, responsible for the separation of fuel and oxidant, and the function of transferring ions (OH-), which is very important for the performance, reliability and service life of the entire system Influence. An ideal anionic polymer electrolyte membrane material needs to meet the following requirements: a) high ionic conductivity; b) good thermal stability; c) high mechanical strength and dimensional stability in both dry and wet conditions; d ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08J5/22C08J3/24C08L81/06C08K5/17
Inventor 胡朝霞陈守文杨慧房世超唐卫芬武艺毕慧平凌瑛
Owner NANJING UNIV OF SCI & TECH
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