Semi-aromatic sulfonated polyether ketone and preparation method thereof

Abstract

The invention discloses semi-aromatic sulfonated polyether ketone for a proton exchange membrane material, and a preparation method thereof. The preparation method comprises the following steps: adding and dissolving aromatic sulfonated monomers and aliphatic dicarboxylic acid in Eaton reagent and mixing evenly; reacting for 2-24 hours at the temperature of 20-80 DEG C to obtain a solution; mixing the solution with distilled water to obtain flocculent solid precipitates; washing the flocculent solid precipitates with distilled water to remove inorganic compounds, and performing drying to obtain the semi-aromatic sulfonated polyether ketone. Due to the introduction of aliphatic chains, melt pouring membrane formation can be realized on the premise that the material using properties are satisfied, and the simplified technology and the excellent repeatability of the semi-aromatic sulfonated polyether ketone are beneficial to large-area preparation of membrane materials with uniform structures.

Description

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a semi-aromatic sulfonated polyether ketone used as a proton exchange membrane material and a preparation method thereof. Background technique

[0002] Proton exchange membrane fuel cells have the advantages of high specific power, low operating temperature, low corrosion and long life, and are considered to be the preferred power source for aerospace, military, and electric vehicles. As the core of the proton exchange membrane fuel cell, the performance of the proton exchange membrane directly determines the performance of the fuel cell. At present, most commercial proton exchange membrane materials are perfluorinated sulfonated polymers, and the most widely used one is the perfluorinated sulfonated polymer developed by DuPont with the trade name Nafion. This type of material has the advantages of high proton conductivity, good mechanical strength, excellent stabili...

Examples

Embodiment 1

[0027] 0.01mol 1,4-bis(3-sodium sulfonate-4-phenoxy-benzoyl)benzene, 0.01mol sebacic acid and 30.3g Eaton's reagent, the mass ratio of sebacic acid and Eaton's reagent is 15: 1. Add it to the reaction flask of the spherical condenser connected to the calcium chloride drying tube at the top; the Eaton reagent is prepared by dissolving phosphorus pentoxide in methanesulfonic acid, with a mass percentage of 10%; stir at room temperature to dissolve the monomer, and heat up , reacted at 50°C for 10 hours. After the reaction is completed, the obtained solution is poured into distilled water, and the light yellow flocculent solid precipitates is octamethylene sulfonated polyether ketone, which is boiled and washed 5 times with distilled water to remove inorganic compounds. After drying, the yield was 97%.

[0028] After testing: the infrared spectrogram of the semi-aromatic sulfonated polyetherketone prepared in this embodiment, refer to the attached figure 1 As shown, 1700cm -1 ...

Embodiment 2

[0030] In Example 1, the reaction at 50° C. for 10 hours was replaced by the reaction at 80° C. for 3 hours. Other monomer feed ratios, reaction conditions and processing steps were the same as in Example 1. The product is a pale yellow solid with a yield of 95%.

Embodiment 3

[0032] In Example 1, the fixed reaction temperature was set as a temperature program, that is, the reaction at 50°C for 10 hours was replaced by the reaction at 20°C for 2 hours, then the temperature was raised to 60°C for 2 hours, and then the reaction was performed at 80°C for 2 hours. Other monomer feed ratios and reaction conditions and processing steps are the same as in Example 1. The product is a pale yellow solid with a yield of 98%.

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a semi-aromatic sulfonated polyether ketone used as a proton exchange membrane material and a preparation method thereof. Background technique

[0002] Proton exchange membrane fuel cells have the advantages of high specific power, low operating temperature, low corrosion and long life, and are considered to be the preferred power source for aerospace, military, and electric vehicles. As the core of the proton exchange membrane fuel cell, the performance of the proton exchange membrane directly determines the performance of the fuel cell. At present, most commercial proton exchange membrane materials are perfluorinated sulfonated polymers, and the most widely used one is the perfluorinated sulfonated polymer developed by DuPont with the trade name Nafion. This type of material has the advantages of high proton conductivity, good mechanical strength, excellent stabili...

Examples

Embodiment 1

[0027] 0.01mol 1,4-bis(3-sodium sulfonate-4-phenoxy-benzoyl)benzene, 0.01mol sebacic acid and 30.3g Eaton's reagent, the mass ratio of sebacic acid and Eaton's reagent is 15: 1. Add it to the reaction flask of the spherical condenser connected to the calcium chloride drying tube at the top; the Eaton reagent is prepared by dissolving phosphorus pentoxide in methanesulfonic acid, with a mass percentage of 10%; stir at room temperature to dissolve the monomer, and heat up , reacted at 50°C for 10 hours. After the reaction is completed, the obtained solution is poured into distilled water, and the light yellow flocculent solid precipitates is octamethylene sulfonated polyether ketone, which is boiled and washed 5 times with distilled water to remove inorganic compounds. After drying, the yield was 97%.

[0028] After testing: the infrared spectrogram of the semi-aromatic sulfonated polyetherketone prepared in this embodiment, refer to the attached figure 1 As shown, 1700cm -1 ...

Embodiment 2

[0030] In Example 1, the reaction at 50° C. for 10 hours was replaced by the reaction at 80° C. for 3 hours. Other monomer feed ratios, reaction conditions and processing steps were the same as in Example 1. The product is a pale yellow solid with a yield of 95%.

Embodiment 3

[0032] In Example 1, the fixed reaction temperature was set as a temperature program, that is, the reaction at 50°C for 10 hours was replaced by the reaction at 20°C for 2 hours, then the temperature was raised to 60°C for 2 hours, and then the reaction was performed at 80°C for 2 hours. Other monomer feed ratios and reaction conditions and processing steps are the same as in Example 1. The product is a pale yellow solid with a yield of 98%.

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