Preparation method of high-temperature proton conductor composite material

A technology of proton conductors and composite materials, which is applied in the field of preparation of high-temperature proton conductor composite materials, can solve various problems, and achieve the effects of improving mechanical properties, good application prospects, and wide use

Inactive Publication Date: 2010-07-14
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Sulfonated phenylphosphonate doped with sulfonated polyethersulfone, sulfonated poly(ether ether ketone) and other polymer materials to prepare medium-temperature proton exchange membranes We have reported patents (Li Zhongfang et al., CN200810160560.8, CN 200810160561.2), but the situation of this invention is completely different

Method used

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  • Preparation method of high-temperature proton conductor composite material
  • Preparation method of high-temperature proton conductor composite material
  • Preparation method of high-temperature proton conductor composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of [embodiment 1] PBI (known technology)

[0036] With stirrer, N 2 Add the PPA of 25g 84% in the 250ml three-neck flask of inlet and condenser tube, and 0.774g4,4'-dicarboxy diphenyl ether, oil bath is heated to 150 ℃ and under N 2 Continue stirring for 30min under protection to remove the air in the round bottom flask, add 0.6428g (3mmol) 3 in the flask, 3'-diaminobenzidine, N 2 React under protection at 220°C for 5-12 hours, pour the resulting viscous solution into deionized water to obtain a brown strip polymer, wash with deionized water until weakly acidic, then wash with 10% NaOH solution until neutral, dry, and mechanically pulverize Get PBI powder.

Embodiment 2

[0037] [embodiment 2]: the preparation of other types of PBI (known technology)

[0038] The preparation method of other types of PBI is the same as that of Example 1, except that the aromatic diacids and aromatic tetramines and the proportions of the reaction raw materials are changed.

[0039] The synthetic method of the hyperbranched PBI is the same as the above embodiment, except that the aromatic tetraamine is changed into aromatic hexamine or other polyamines.

Embodiment 3

[0040] [embodiment 3]: the preparation of phenylphosphonic acid (known technology)

[0041] Add 26.6mL of phosphorus trichloride, 6.5mL of dry benzene, and 11g of anhydrous aluminum trichloride into a three-necked flask equipped with an electric stirrer, a reflux condenser, and a dropping funnel, stir, and slowly heat until the benzene boils. Heated to reflux for 8h. Stop heating, add 18mL of phosphorus oxychloride dropwise while hot, and finish adding dropwise in 0.5h. Then add 40mL of petroleum ether, and reflux for 0.5h. After cooling, a yellow viscous liquid was obtained. The yellow viscous liquid was washed with petroleum ether to obtain a hard solid. Petroleum ether was evaporated to obtain a light yellow liquid with yellow crystals. After standing for 6 hours, a light yellow paste was obtained. After adding ethanol, stirred and filtered to obtain a yellow powder.

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Abstract

The invention relates to a preparation method of a high-temperature proton conductor composite material, which is characterized in that sulfonated triphenylphosphine salt is added into polybenzimidazole after the polybenzimidazole is dissolved in a solvent to obtain membrane casting solution, the membrane casting solution is poured onto a glass membrane casting plate to be dried for 24 hours at the temperature of 60 DEG C and then to be dried for 4 hours at the temperature of 100 DEG C, the glass membrane casting solution is steeped into a deionized water after being naturally cooled to the room temperature, then the membrane is torn off, and a polybenzimidazole-type high polymer material doped with sulfonated triphenylphosphine salt high-temperature proton conductor composite material is obtained. The sulfonated triphenylphosphine salt is used as the doping material, so the PBI has good proton conduction performance, and the sulfonated triphenylphosphine salt not only can make the PBI be well blended with the high polymer material, but also can improve the mechanical performance of the material. The composite material can be used at the temperature of room temperature to 180 DEG C, and the electric conductivity of the composite material is within 0.08 to 0.2 S/cm. The composite material can be applicable to the high-temperature proton exchange membrane material and other proton conduction material of the fuel cell, and also can be applicable to the fields such as the electrolysis, the sensor, the electro-luminescent material and the like.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature proton conductor composite material. Background technique [0002] The glass transition temperature of polybenzimidazole (PBI) is 480°C, there is basically no weight loss below 500°C in nitrogen, and the highest decomposition temperature exceeds 600°C. Excellent low temperature performance, not brittle at -196°C. The tensile strength of the PBI film is 110MPa, the tensile modulus is 2.65GPa, and the elongation is 11%. PBI is nonflammable in air and burns slowly in oxygen. It can resist strong acid, strong alkali and organic solvent, and it is the only material with high temperature resistance, low temperature resistance and chemical corrosion resistance. [0003] PBI can be used in various film materials, adhesives, insulating paint, foam plastics and fibers and other fields. It has a very wide range of applications in aerospace, ablation-resistant heat shielding materials, drag pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K5/5317C08J5/22
Inventor 李忠芳王素文董飞龙于先进
Owner SHANDONG UNIV OF TECH
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