Method for preparing P(VDF-DB)-g-S-C3H6-SO3H proton exchange membrane material
A proton exchange membrane and VDF-DB technology, which is applied in the field of preparing fluoropolymer-based proton exchange membrane materials, can solve the problems of complex preparation process and complex process, and achieve the effect of simple process and mild conditions.
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Embodiment 1
[0026] This embodiment includes the following steps:
[0027] Step 1: Add the raw material P(VDF-CTFE) into the reaction bottle, and add the solvent N-methylpyrrolidone at the same time. After fully dissolving, add a sufficient amount of catalyst triethylamine, and stir the reaction at 55°C-65°C for 24 hours. The resulting polymer solution P(VDF-DB) was precipitated with deionized water, while excess triethylamine was removed with hydrochloric acid. After soaking the precipitated polymer in methanol, it is vacuum-dried to constant weight at no higher than 50°C. At this time, the structure can be characterized by nuclear magnetic resonance. The hydrogen nuclear magnetic resonance spectrum can be seen in figure 1 , it can be clearly seen that P(VDF-DB) has a new multiple peak at 6.1-6.5ppm than the raw material, and this peak corresponds to the chemical shift of (-CF2-CF=CH-CF2-)H on the double bond .
[0028] Step two:
[0029] Add the polymer P(VDF-DB) obtained in step 1 in...
Embodiment 2
[0037] This embodiment includes the following steps:
[0038] Step 1: Add the raw material P(VDF-CTFE) into the reaction bottle, and add the solvent at the same time. After fully dissolving, add a sufficient amount of catalyst triethylamine, and stir the reaction at 55°C-65°C for 24 hours. The resulting polymer solution P(VDF-DB) was precipitated with deionized water, while excess triethylamine was removed with hydrochloric acid. The precipitated polymer is soaked in methanol, and vacuum-dried to a constant weight at a temperature not higher than 50°C.
[0039] Step two:
[0040] Add the polymer P(VDF-DB) obtained in step 1 into the reaction flask, the chemical composition of P(VDF-DB) is VDF / DB=86:14, add a solvent to fully dissolve. Then add an appropriate amount of 3-mercapto-1-propanesulfonate sodium and an appropriate amount of deionized water. After the sodium mercaptosulfonate is completely dissolved, add an appropriate amount of catalyst in the reaction solution, whe...
Embodiment 3
[0047] This embodiment includes the following steps:
[0048] Step 1: Add the raw material P(VDF-CTFE) into the reaction bottle, and add the solvent at the same time. After fully dissolving, add a sufficient amount of catalyst triethylamine, and stir the reaction at 55°C-65°C for 24 hours. The resulting polymer solution P(VDF-DB) was precipitated with deionized water, while excess triethylamine was removed with hydrochloric acid. The precipitated polymer is soaked in methanol, and vacuum-dried to a constant weight at a temperature not higher than 50°C.
[0049] Step two:
[0050] Add the polymer P(VDF-DB) obtained in step 1 into the reaction flask, the chemical composition of P(VDF-DB) is VDF / DB=86:14, add a solvent to fully dissolve. Then add an appropriate amount of 3-mercapto-1-propanesulfonate sodium and an appropriate amount of deionized water. After the sodium mercaptosulfonate is completely dissolved, add an appropriate amount of catalyst in the reaction solution, whe...
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