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Sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and preparation method of sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein

A technology of sulfonated polyarylether and polymer membrane, which is applied in the field of sulfonated polyarylether phosphine oxide polymer and its membrane preparation, can solve the problems of affecting the dimensional stability of the membrane, loss of mechanical properties, temperature rise, etc., and achieve comprehensive Improve performance, improve overall performance, reduce swelling rate

Inactive Publication Date: 2019-06-11
SHANGHAI INST OF TECH
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  • Claims
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Problems solved by technology

This paper reports the preparation and performance of the sulfonated polyarylene sulfide phosphine oxide proton exchange membrane. The membrane exhibits good thermal stability, chemical stability and high proton conductivity, but the Excessive swelling phenomenon, some even lose mechanical properties, affect the dimensional stability of the membrane

Method used

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  • Sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and preparation method of sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein
  • Sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and preparation method of sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein
  • Sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and preparation method of sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein

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preparation example Construction

[0040] see figure 1 A method for preparing a phenolphthalein-containing sulfonated polyarylether phosphine oxide polymer film, comprising the following steps:

[0041] A: Use sulfonated dihalogen triphenylphosphine oxide monomer and equimolar phenolphthalein as reaction raw materials, or use dihalogen triphenylphosphine oxide monomer and equimolar phenolphthalein as reaction raw materials, or use sulfonated dihalogen triphenylphosphine oxide monomer as reaction raw material The molar sum of phenylphosphine oxide monomers, dihalogen triphenylphosphine oxide monomers and equimolar phenolphthalein are the reaction raw materials, and the reaction raw materials, reaction solvent, catalyst, and dehydrating agent are added to the reaction vessel together, and passed Protective gas, stirring, heating, dehydration polymerization, then cooling, precipitation, and washing to obtain sulfonated polyarylether phosphine oxide polymers containing phenolphthalein; the heating range is 120 ° C ...

Embodiment 1

[0070] Add 3.16mmol bis(4-fluorophenyl)phenylphosphine oxide, 3.16mmol phenolphthalein and 3.48mmol K 2 CO 3 , and then add 8 mL of DMAc (N,N-dimethylacetamide) and 8 mL of toluene into the flask, pass through nitrogen protection, and stir at room temperature for 30 min. Raise the temperature to 150°C and allow the reaction system to reflux for 4 hours. During this process, a small amount of water generated by the reaction can be taken away through the water separator along with the reflux of toluene. After the toluene was discharged from the water separator, the reaction was continued at 165° C. for 48 h until the viscosity of the reaction system became very large. The reaction system was naturally cooled to 120°C, and 2 mL of DMAc was added to the three-neck reaction flask to dilute it, and then poured into 300 mL of deionized water, and stirred while pouring to obtain a yellow strip product. Soak the product in hot water to remove K 2 After CO3 inorganic salt, vacuum dry...

Embodiment 2

[0073] Add 2.24mmol bis(4-fluorophenyl)-3'-sulfonate sodium phenylphosphine oxide, 0.56mmol bis(4-fluorobenzene Base) phenylphosphine oxide, 2.80mmol phenolphthalein and 3.08mmol K 2 CO 3 , and then add 8mL DMAc and 8mL toluene into the flask, pass through nitrogen protection, and stir at room temperature for 30min. Raise the temperature to 150°C and allow the reaction system to reflux for 4 hours. During this process, a small amount of water generated by the reaction can be taken away through the water separator along with the reflux of toluene. After the toluene was discharged from the water separator, the reaction was continued at 165° C. for 48 h until the viscosity of the reaction system became very large. The natural temperature of the reaction system was lowered to 120 °C, and 2 mL of DMAc was added to the reaction three-necked flask to dilute it, and then poured into 300 mL of deionized water, and stirred while pouring to obtain a yellow strip product. Soak the prod...

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Abstract

The invention discloses a sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and a preparation method of a sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein. The method comprises the following steps: with a sulfonated dihalogen triphenyl phosphine oxide monomer and / or a dihalogen triphenyl phosphine oxide monomer and phenolphthalein in equal molar as reaction raw materials, adding reaction raw materials, reaction solvents, a catalyst and a dehydrating agent together to a reactor, introducing protective gas, and conductingstirring, heating, dehydration and polymerization, cooling, precipitation and washing to obtain the sulfonated poly(arylene ether phosphine oxide) polymer; and dissolving the obtained sulfonated poly(arylene ether phosphine oxide) polymer, and conducting casting into a membrane to obtain the sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein. The polymer membrane obtained by the method not only maintains high proton conductivity, but also the swelling of the polymer membrane is effectively reduced, and the comprehensive properties of the membrane are improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cell proton exchange membranes, and in particular relates to a sulfonated polyarylether phosphine oxide polymer containing phenolphthalein and a membrane preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a clean energy utilization device, in which proton exchange membrane is one of its core components. At present, the proton exchange membrane that is widely and commercially used is Nafion membrane, but it has the disadvantages of low operating temperature, high methanol permeability, sharp drop in conductivity under high temperature and low humidity, and high price, which hinders the further application and development of the membrane; Polyaromatic polymers are the main research direction in the field of proton exchange membranes in recent years. Compared with Nafion membranes, they have the advantages of low preparation cost, good thermal stability, stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/06C08J5/18C08L85/02H01M8/1034H01M8/1072
CPCY02E60/50
Inventor 廖慧英黄清奇张珊珊禹华国
Owner SHANGHAI INST OF TECH
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