A kind of preparation method of phenolic resin reinforced three-dimensional graphene airgel

A graphene aerogel, phenolic resin technology, applied in aerogel preparation, chemical instruments and methods, colloid chemistry and other directions, can solve problems such as shedding, weak interaction, affecting electrical properties, stability and mechanical properties, etc. To achieve good electrical properties, to achieve the effect of simple and easy preparation, preparation method

Active Publication Date: 2021-08-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this type of material, due to the weak interaction between graphene and the polymer framework (van der Waals force and π-π interaction), it is easy to fall off from the polymer framework, thereby affecting its electrical properties, stability and mechanical properties. performance

Method used

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  • A kind of preparation method of phenolic resin reinforced three-dimensional graphene airgel
  • A kind of preparation method of phenolic resin reinforced three-dimensional graphene airgel
  • A kind of preparation method of phenolic resin reinforced three-dimensional graphene airgel

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preparation example Construction

[0032] As a detailed example of the preparation method of a phenolic resin-reinforced three-dimensional graphene airgel, the specific steps include: (1) ultrasonically dispersing graphene oxide in deionized water to obtain an aqueous solution of graphene oxide; (2) then phenolic , cross-linking agent and curing accelerator, aldehydes and phenolic reaction catalysts are sequentially added to the graphene oxide dispersion in (1) according to a certain proportion, after stirring evenly, the mixed solution is transferred to a reaction kettle, and hydrothermal treatment is carried out at a certain temperature Reaction; (3) after reacting for a period of time, the (2) reactor is cooled to room temperature, and the hydrogel after the reaction is taken out, and unreacted phenol and aldehyde monomers are removed by repeated washing with deionized water; (4) the (3) ) hydrogels were freeze-dried to obtain phenolic resin-reinforced three-dimensional graphene aerogels.

[0033] The three-...

Embodiment 1

[0036] First, graphene oxide was prepared by the improved Hummers method, and a 4 mg / ml graphene oxide aqueous solution was prepared by ultrasonic and mechanical stirring, and then phenol (62 mg) and formaldehyde (18 mg) were added in a molar ratio of 1:1 Concentration is in the graphene oxide dispersion (160ml) of 5mg / ml, then add the potassium hydroxide of 10% of the total mass of phenolic substances and aldehydes substance, ultrasonic and stir evenly and then transfer to the reaction kettle. React the reaction kettle with the mixed solution at 160° C. for 8 hours to obtain graphene hydrogel reinforced with phenolic resin. After the hydrogel was washed with deionized water and freeze-dried for 48 h, a three-dimensional graphene airgel reinforced with phenolic resin was obtained. Then put the three-dimensional graphene airgel reinforced by phenolic resin into a quartz tube, under the protection of 200sccm argon, heat up to 800°C, anneal for 2 hours, and obtain the three-dimen...

Embodiment 2

[0038] First, graphene oxide was prepared by the improved Hummers method, and a 4 mg / ml graphene oxide aqueous solution was prepared by ultrasonic and mechanical stirring, and then phenol (62 mg) and formaldehyde (18 mg) were added in a molar ratio of 1:1 Concentration is in the graphene oxide dispersion liquid (160ml) of 5mg / ml, then add the potassium hydroxide of 10% of the total mass of phenolic substances and aldehydes substance, add the hexamethylenetetramine of 10mg and 5mg after stirring for 30min Benzenesulfonyl chloride, ultrasonic and stirred evenly, then transferred to the reaction kettle. React the reaction kettle with the mixed solution at 160° C. for 8 hours to obtain graphene hydrogel reinforced with phenolic resin. After the hydrogel was washed with deionized water and freeze-dried for 48 h, a three-dimensional graphene airgel reinforced with phenolic resin was obtained. Then put the three-dimensional graphene airgel reinforced by phenolic resin into a quartz ...

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Abstract

The invention relates to a preparation method of phenolic resin-reinforced three-dimensional graphene airgel. The preparation method comprises: adding phenolic substances and aldehyde substances into graphene oxide aqueous solution to obtain precursor aqueous solution; adding a phenolic reaction catalyst to The three-dimensional graphene airgel reinforced by the phenolic resin is obtained through hydrothermal reaction at 90° C. to 210° C. for 6 to 24 hours in the precursor aqueous solution, and then washing and drying.

Description

technical field [0001] The invention relates to a preparation method of phenolic resin reinforced three-dimensional graphene airgel, belonging to the field of three-dimensional graphene airgel. Background technique [0002] Graphene is a carbon atom with SP 2 A single-layer crystal material formed by hybridization, but due to the electrostatic and π-π interactions between graphene sheets, it is easy to stack into a two-dimensional structure material with low porosity, which limits its application range. Therefore, constructing graphene sheets into three-dimensional porous structures has attracted increasing attention in order to expand their application range. Three-dimensional graphene airgel has the characteristics of low density, high electrical conductivity, high specific surface area and high porosity, and has great application prospects in energy, environment, electronics and other fields. Generally, the methods for preparing three-dimensional graphene macroscopic bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 黄富强孙甜刘战强冯炫凯丁卫
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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