Preparation method of semi-flexible polyether sulfone/ ketone anion-exchange membrane
An anion exchange membrane and polyethersulfone technology, applied in electrical components, circuits, battery electrodes, etc., can solve the problems of inability to form ion channels, low ion conductivity, poor mechanical strength, etc., and achieve cheap and abundant raw materials and high ion conductivity The effect of simple steps and simple steps
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Embodiment 1
[0026] Preparation of 4C-PES polymer: Dissolve 0.05 mol of 1,4 dibromobutane and 0.5 mol of hydroquinone in 95% ethanol, heat to reflux, add 0.15 mol KOH ethanol solution dropwise, react for 5 hours, and synthesize 4C Flexible diphenol monomer, recrystallized to give pure material. In a three-necked flask equipped with a nitrogen inlet and outlet device and a Dean-Stark separator, add 2.5425g of 4,4-difluorodiphenylsulfone (10mmol), 2.7432g of 4C flexible diphenol monomer (10mmol), and 30mL of DMSO , 2.7624 g of potassium carbonate (20 mmol) and 15 mL of toluene. Gradually raise the temperature to 140°C and reflux for 5 hours until the water is completely removed in the form of toluene / water azeotrope, then the temperature rises slowly to 165°C, and the temperature is kept constant for 15 hours. The reaction was complete and cooled to room temperature. The product was slowly poured into ice water, and a white fibrous polymer product was precipitated. Wash and soak the produ...
Embodiment 2
[0032] Preparation of 6C-PES polymer:
[0033] Similar to the preparation method of 4C-PES in Example 1, the difference is that -CH 2 The number of - is 6. Dissolve 0.05 mol of 1,6-dibromohexane and 0.5 mol of hydroquinone in 95% ethanol, heat to reflux, dropwise add 0.15 mol of KOH in ethanol solution, and react for 5 hours to synthesize 6C flexible diphenol mono body, recrystallized to obtain pure monomer. In a three-necked flask equipped with a nitrogen inlet and outlet device and a Dean-Stark separator, 2.5425g of 4,4-difluorodiphenylsulfone (10mmol), 3.0232g of 6C diphenol monomer (10mmol), 30mL of DMSO, 2.7624 g of potassium carbonate (20 mmol) and 15 mL of toluene. Gradually raise the temperature to 140°C and reflux for 5 hours until the water is completely removed in the form of toluene / water azeotrope, then the temperature rises slowly to 165°C and keeps this temperature constant for 15 hours. The reaction was complete and cooled to room temperature. The product ...
Embodiment 3
[0035] Preparation of 8C-PES polymer:
[0036] Similar to the preparation method of 4C-PES in Example 1, the difference is that -CH 2 The number of - is 8. Dissolve 0.05 mol of 1,8-dibromooctane and 0.5 mol of hydroquinone in 95% ethanol, heat to reflux, add 0.15 mol of KOH in ethanol solution dropwise, and react for 5 hours to synthesize 8C flexible diphenol mono body, recrystallized to obtain pure monomer. In a three-neck flask equipped with a nitrogen inlet and outlet device and a Dean-Stark separator, 2.5425g of 4,4-difluorodiphenylsulfone (10mmol), 3.3232g of 8C diphenol monomer (10mmol), 30mL of DMSO, 2.7624 g of potassium carbonate (20 mmol) and 15 mL of toluene. Gradually raise the temperature to 140°C and reflux for 5h until the water is completely removed in the form of toluene / water azeotrope, then the temperature rises slowly to 165°C, and the temperature is kept constant for 18h. The reaction was complete and cooled to room temperature. The product was slowly...
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