Branched side chain polymer anion exchange membrane and preparation method thereof

An anion exchange membrane and polymer technology, applied in the field of branched side chain polymer anion exchange membrane and its preparation, can solve the problems of decreased solubility, low controllability of alkyl side chain length, entanglement of main chain and side chain and other issues, to achieve high chemical reactivity, taking into account the effect of conductivity-stability

Inactive Publication Date: 2016-09-07
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the controllability of the length of the synthesized alkyl side chain is very low. If the length is too large, the main chain and the side chain will be entangled, which will reduce the solubility of the polymer in organic solvents; Watanabe et al. Introduce bisphenol fluorene structure into polyether sulfone ketone block polymer, at 30°C, the conductivity is 50mS / cm (IEC=2.54meq.g-1), and at 80°C and 60%RH (relative humidity) , the maximum stress is 48 MPa, maintaining good mechanical properties [Masahiro Watanabe, et al,.Polym.Chem.2011,2,99-106]

Method used

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  • Branched side chain polymer anion exchange membrane and preparation method thereof
  • Branched side chain polymer anion exchange membrane and preparation method thereof
  • Branched side chain polymer anion exchange membrane and preparation method thereof

Examples

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Embodiment example 1

[0030]Synthesis of chloromethylated polysulfone (CMPSf): under nitrogen protection, 7 g of polysulfone was dissolved in chloroform, and 420 μl of SnCl was added dropwise 4 , and then slowly add 11.9 ml of chloromethyl methyl ether with a syringe; react at 55°C for 10 hours, after the reaction, precipitate the mixture in ethanol, filter it with suction, soak it in ethanol and stir for 12 hours, filter it with suction, and use it several times After washing with deionized water and ethanol, the resulting white precipitate was vacuum-dried at 60°C for 24 hours. The degree of chloromethylation (DCM) of the obtained product was 0.77.

[0031] Ionization of chloromethylated polysulfone (CMPSf): Take 1 mole part of CMPSf dissolved in 25 mole parts of DMAC, add 1 mole part of 1-methylimidazole (MIm), and react at 60°C for 6h.

[0032] Membrane casting: cast the above reaction solution on a clean glass plate, flow to form a membrane, and dry at 60°C for 18 hours to obtain an anion mem...

Embodiment example 2

[0035] Synthesis of chloromethylated polysulfone (CMPSf): under nitrogen protection, 7 g of polysulfone was dissolved in chloroform, and 420 μl of SnCl was added dropwise 4 , and then slowly add 11.9 ml of chloromethyl methyl ether with a syringe; react at 55°C for 10 hours, after the reaction, precipitate the mixture in ethanol, filter it with suction, soak it in ethanol and stir for 12 hours, filter it with suction, and use it several times After washing with deionized water and ethanol, the resulting white precipitate was vacuum-dried at 60°C for 24 hours. The degree of chloromethylation (DCM) of the obtained product was 0.77.

[0036] Synthesis of branched side chain polymer (BPSf) by ATRP reaction: Weigh about 0.6g of CMPSf with DCM=77%, and NMP (10ml) as solvent, dissolve in a four-necked bottle, in order to ensure nitrogen protection environment, nitrogen gas-pump After vacuum-nitrogen circulation for 3 to 5 times, quickly add 0.02g of cuprous chloride (CuCl) and 0.09g...

Embodiment example 3

[0041] Synthesis of chloromethylated polysulfone (CMPSf): under nitrogen protection, 7 g of polysulfone was dissolved in chloroform, and 420 μl of SnCl was added dropwise 4 , and then slowly add 11.9 ml of chloromethyl methyl ether with a syringe; react at 55°C for 10 hours, after the reaction, precipitate the mixture in ethanol, filter it with suction, soak it in ethanol and stir for 12 hours, filter it with suction, and use it several times After washing with deionized water and ethanol, the resulting white precipitate was vacuum-dried at 60°C for 24 hours. The degree of chloromethylation (DCM) of the obtained product was 0.77.

[0042] Synthesis of branched side chain polymer (BPSf) by ATRP reaction: Weigh about 0.6g of CMPSf with DCM=77%, NMP (13ml) as solvent, dissolve in a four-necked bottle, in order to ensure nitrogen protection of the environment, nitrogen-pumping After vacuum-nitrogen circulation for 3 to 5 times, quickly add 0.05g of cuprous chloride (CuCl) and 0.2...

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Abstract

The invention discloses a branched side chain polymer anion exchange membrane and a preparation method thereof. Preparation of the membrane material is based on the situation that chloromethyl polysulfone serves as a macroinitiator, p-chloromethyl styrene serves as a monomer, and a series of polymers containing branched side chain structures are synthesized through an ATRP reaction. Rich end groups with high chemical reactivity are utilized, and the alkaline anion exchange membrane with a low chloromethylation degree and high conductivity can be prepared through after-treatment. In addition, micro-phase separation of different degrees can be achieved in the membrane by modulating the branching degrees of side chains, and the objective of considering both the conductivity and stability of the anion exchange membrane is achieved. The prepared anion membrane is high in structural adjustability, high in conductivity and good in self-rejection swelling property, and has great significance for research on the conductivity and stability balance of the membrane.

Description

technical field [0001] The invention belongs to the field of fuel cell membrane materials, and relates to a branched side chain polymer anion exchange membrane and a preparation method thereof. Background technique [0002] With the continuous development of global industry, the human demand for energy continues to grow, and the long-term dependence on the energy supply form of traditional fossil fuel combustion has caused a series of environmental pollution, energy shortage and other problems. The fuel cell technology uses electrochemical reactions to convert the chemical energy stored in the fuel into electrical energy. As a new energy technology, it has received a lot of attention. Among them, the alkaline anion exchange membrane fuel cell (AAEMFC) has been studied by many scholars because of its low oxygen reduction overpotential, fast electrode reaction kinetics, the use of non-noble metals as catalysts, no carbonate crystallization, and low fuel permeability. hotspots...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F212/14C08F8/44C08G75/20H01M8/0239H01M2/16H01M50/411
CPCH01M8/02C08F8/44C08F283/002C08G75/20H01M50/411C08F212/14Y02E60/50Y02E60/10
Inventor 张凤祥李姗姗刘燕祥甘瑞君张奎博
Owner DALIAN UNIV OF TECH
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