Preparation method of graphene/polyimide-based carbon aerogel

A polyimide-based carbon and polyimide technology is applied in the field of polyimide-based carbon aerogel materials and their preparation, and achieves the effects of ingenious design ideas, easy operation and simple preparation process

Inactive Publication Date: 2015-02-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been reported that polyimide airgel is subjected to high-temperature carbonization to obtain carbon aerogel.

Method used

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  • Preparation method of graphene/polyimide-based carbon aerogel
  • Preparation method of graphene/polyimide-based carbon aerogel
  • Preparation method of graphene/polyimide-based carbon aerogel

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment includes the following steps:

[0049] Using N, N-dimethylacetamide as a solvent, the solid content of 15% is prepared by condensation polymerization of equimolar ratio of 4,4'-diaminodiphenyl ether and terephthalic anhydride in an ice-water bath of polyamic acid. The specific process is as follows: Dissolve 4.31 g of 4,4′-diaminodiphenyl ether in 51 g of N, N-dimethylacetamide, add 4.69 g of terephthalic anhydride, and react in an ice-water bath for 5 h. Then, 2.18 g of triethylamine was added and the reaction was continued for 5 h to prepare a water-soluble polyamic acid solution with a solid content of 15%. The prepared water-soluble polyamic acid is precipitated with deionized water, and then washed and freeze-dried to obtain the water-soluble polyamic acid fiber for use.

[0050] Take 2.5 mL of the prepared 8 mg / mL graphene oxide aqueous solution, add 8.5 mL of deionized water and 0.5 g of triethylamine, and sonicate for 0.5 h. Put 1 g of water-s...

Embodiment 2

[0054] Change the mass ratio of graphene oxide to polyamic acid to 4:100, that is, take 5 mL of the prepared 8 mg / mL graphene oxide aqueous solution, add 6 mL of deionized water and 0.5 g of triethylamine, and sonicate for 0.5 h , the rest are the same as implementation 1, the final prepared graphene oxide / polyamic acid airgel is denoted as GO-PAA-4, and the prepared graphene / polyimide aerogel is denoted as G-PI-4 , the prepared graphene / polyimide-based carbon airgel, denoted as GC-4.

Embodiment 3

[0056] Change the mass ratio of graphene oxide to polyamic acid to 6:100, that is, take 7.5 mL of the prepared 8 mg / mL graphene oxide aqueous solution, add 3.5 mL of deionized water and 0.5 g of triethylamine, and ultrasonically 0.5 h, the rest are the same as in implementation 1, the final prepared graphene oxide / polyamic acid airgel is denoted as GO-PAA-6, and the prepared graphene / polyimide airgel is denoted as G-PI -6, the prepared graphene / polyimide-based carbon airgel, denoted as GC-6.

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Abstract

The invention belongs to the technical field of nanoporous material, namely carbon aerogel, and particularly relates to graphene oxide-crosslinked polyimide-based carbon aerogel and a preparation method thereof. The invention carbon aerogel is prepared by crosslinking polyamide acid aerogel by graphene oxide, and comprises the components of graphene oxide and one or more water-soluble polyimide precursor-polyamide acids. The preparation method comprises the following steps: mixing an aqueous graphene oxide solution with the water-soluble polyimide precursor-polyamide acid, and preparing graphene oxide/polyamide acid aerogel through sol-gel and freeze-drying processes; preparing the graphene/polyimide-based carbon aerogel through thermal imidization and high temperature carbonization. According to the preparation method, a toxic reagent formaldehyde is not used; the prepared carbon aerogel has a mesoporous, microporous and macroporous three-level three-dimensional network porous structure, high specific surface area, high conductivity and stable physical and chemical properties, and is an ideal electrode material for preparing a supercapacitor and other new energy devices and a high-performance adsorbent material.

Description

technical field [0001] The invention belongs to the technical field of nanoporous materials-carbon airgel, and in particular relates to a graphene-crosslinked polyimide-based carbon airgel material and a preparation method thereof. The graphene / polyimide-based carbon Aerogels can be used as catalyst carriers, hydrogen storage materials, adsorption materials, and electrode materials for supercapacitors or lithium-ion batteries. Background technique [0002] Carbon airgel is a new type of lightweight nanoporous material. It is widely used as a catalyst carrier because of its good stability, high porosity, large specific surface area, high conductivity, and many substances and electron transport channels. , hydrogen storage materials, adsorption materials, and electrode materials for supercapacitors or lithium-ion batteries, etc., are conducive to solving the energy crisis and environmental pollution problems in today's society and have become research hotspots. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04
Inventor 刘天西张由芳樊玮黄云鹏左立增赖飞立缪月娥
Owner FUDAN UNIV
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