Polybenzimidazole and its derivative functional graphene oxide

A technology of polybenzimidazole and its derivatives, which is applied in the field of polybenzimidazole and its derivatives functionalized graphene oxide and its preparation, can solve the problems of weak reactivity, limited content of functional groups, numerous reaction steps, etc., and achieve The effect of improving electrical conductivity, improving high temperature performance, and improving thermodynamic performance

Inactive Publication Date: 2018-01-23
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems that existing graphene oxide functionalization methods have many reaction steps, low reactivity and extremely limited content of introduced functional groups, the present invention provides a functionalized graphene oxide of polybenzimidazole and its derivatives, which can be used in The surface of graphene oxide is grafted with polybenzimidazole and its derivatives. The functionalized graphene material has a high nitrogen content and a large number of benzimidazole functional groups. It shows good dispersion in organic solvents and is compatible with organic polymers. Materials maintain excellent compatibility

Method used

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  • Polybenzimidazole and its derivative functional graphene oxide
  • Polybenzimidazole and its derivative functional graphene oxide
  • Polybenzimidazole and its derivative functional graphene oxide

Examples

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Embodiment 1

[0025] Example 1: P 1 Preparation of grafted graphene oxide

[0026] Dry graphene oxide solids (250 mg) were added to DMAc (250 mL), and ultrasonicated at room temperature for 2 hours until uniformly dispersed to form a brown suspension. Add A to the suspension 1 (0.11g) and B 1 (0.14g), magnetically stirred and dispersed evenly, poured into a three-necked flask, and added PPA (2g). Under the protection of nitrogen, the temperature was raised to 60°C and kept for 0.5 hours, and then the temperature was raised to 150°C again for 0.5 hours. After the reaction, the mixture was poured into 500mL deionized water and magnetically stirred for 0.5 hours. The product was centrifuged at 10,000rpm, washed twice with DMAc and deionized water alternately, and dried overnight at 60°C in a vacuum oven. .

Embodiment 2

[0027] Example 2: P 2 Preparation of grafted graphene oxide

[0028] Dry graphene oxide solids (250 mg) were added to DMAc (250 mL), and ultrasonicated at room temperature for 2 hours until uniformly dispersed to form a brown suspension. Add B to the suspension 2 (1g), magnetically stirred and dispersed evenly, poured into a three-necked flask, and added PPA (6g). Under the protection of nitrogen, the temperature was raised to 60°C and kept for 0.5 hours, and then the temperature was raised to 160°C again for 2 hours. After the reaction, the mixture was poured into 500mL deionized water and magnetically stirred for 0.5 hours. The product was centrifuged at 10,000rpm, washed twice with DMAc and deionized water alternately, and dried overnight at 60°C in a vacuum oven. .

Embodiment 3

[0029] Example 3: P 3 Preparation of grafted graphene oxide

[0030] Dry graphene oxide solids (250 mg) were added to DMAc (250 mL), and ultrasonicated at room temperature for 2 hours until uniformly dispersed to form a brown suspension. Add A to the suspension 1 (0.52g) and B 3 (0.73g), magnetically stirred and dispersed evenly, poured into a three-necked flask, and added PPA (10g). Under the protection of nitrogen, the temperature was raised to 60°C and kept for 0.5 hours, and then the temperature was raised to 160°C again for 3 hours. After the reaction, the mixture was poured into 500mL deionized water and magnetically stirred for 0.5 hours. The product was centrifuged at 10,000rpm, washed twice with DMAc and deionized water alternately, and dried overnight at 60°C in a vacuum oven. .

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Abstract

The invention discloses a polybenzimidazole and its derivative functional graphene oxide. The derivative functional graphene oxide is prepared by grafting polybenzimidazole and its derivative to the surface of the graphene oxide; adding inorganic monomer in graphene oxide suspension liquid; stirring dispersedly and evenly; adding dehydration cyclizing agent, and reacting under 150-200 DEG C. The functional graphene oxide is high in nitrogen element content and mass in benzimidazole functional groups; the functional graphene oxide shows good dispersibility and keeps excellent compatiability with organic polymer materials. After adding the polybenzimidazole and its derivative functional graphene oxide to SPEEK as the nanofiller; effective acid-alkali interaction can be formed between the imidazole group at the graphene surface and the sulfonic acid group in SPEEK, so that the conductivity, the mechanical performance and dimension stability of a nanometer composite proton exchange membrane are improved; in the post application, the polybenzimidazole and its derivative functional graphene oxide can improve the high temperature performance of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to polybenzimidazole and its derivative functionalized graphene oxide and a preparation method thereof. Background technique [0002] Functionalized graphene oxide material has both the advantages of graphene material itself and the characteristics endowed by surface functional groups, and is a kind of nanomaterial with great potential. In the field of organic-inorganic material composites, it can be used as an inorganic nano-filler to greatly improve the performance of materials. [0003] The functionalization methods of graphene oxide are mainly divided into covalent modification and non-covalent modification. Non-covalent modification mainly uses some intermolecular forces such as electrostatic adsorption, hydrogen bond and π-π to adsorb molecules with target functional groups on Graphene oxide surface. Covalent modification mainly uses the existing oxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198H01M8/1048C08G73/18
CPCY02E60/50
Inventor 张轩邱翔王连军
Owner NANJING UNIV OF SCI & TECH
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