A kind of preparation method of graphene oxide paper with holes reinforced by dendrimers

A graphene paper and dendritic technology, applied in the field of preparation of graphene oxide paper with holes, can solve the problems of low material quality, stress relaxation, low tensile strength, etc., and achieve the effect of high strength

Active Publication Date: 2021-01-01
HARBIN INST OF TECH
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low tensile strength, stress relaxation, and low quality of the final prepared material due to the impermeability of the sheet layer in the graphene oxide film / paper material, and to provide a dendrimer-enhanced A method for preparing graphene oxide paper with holes, which uses the strong oxidation of hydrogen peroxide to erode the epoxy functional group and its adjacent carbon atoms in the graphene oxide sheet to form nanoscale holes, and then introduce polyamide- Amine-type dendritic polymers (PAMAM) form covalent crosslinks between graphene oxide sheets to increase the bonding strength between graphene oxide layers, and finally obtain graphene oxide with higher strength and better quality through directional filtration Film / Paper Material

Method used

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  • A kind of preparation method of graphene oxide paper with holes reinforced by dendrimers

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specific Embodiment approach 1

[0021] Specific embodiment one: what this embodiment records is a kind of preparation method of the graphene oxide paper with holes reinforced by dendrimers, the method is:

[0022] S1: The graphene oxide dispersion was prepared by the improved Hummers method. The concentration of graphene oxide in the dispersion was 2mg / ml-3mg / ml, and the dispersion was neutral. The specific method was as follows:

[0023] (1) Dilute 7.5mL concentrated H 2 SO 4 (98vol.%) was placed in a 100mL beaker and heated to 80°C;

[0024] (2) Add 2.5g K in sequence 2 S 2 o 8 and 2.5g P 2 o 5 , stirring continuously until the reactants are completely dissolved;

[0025] (3) Add 5g of graphite powder to the above mixture, stir to obtain a blue-black mixture, react at 80°C for 6h, cool to room temperature naturally, then dilute with distilled water, filter and wash until the pH value is about 7, remove all soluble Substance, to obtain pre-oxidized graphite, transfer the pre-oxidized graphite to a d...

specific Embodiment approach 2

[0034] Specific embodiment two: the preparation method of the graphene oxide paper with holes strengthened by a kind of dendrimers described in specific embodiment one, in S2, the volume ratio of described hydrogen peroxide solution and graphene oxide dispersion liquid is 5 -20ml: 50-70ml.

specific Embodiment approach 3

[0035] Specific embodiment three: the preparation method of a kind of dendrimer-reinforced graphene oxide paper with holes described in specific embodiment one, in S2, the specific conditions of the erosion are: stirring and heating under 100°C oil bath for 3~ 5h.

[0036] Embodiment 4: The preparation method of a kind of dendrimer-reinforced graphene oxide paper with holes described in Embodiment 1. In S3, the polyamide-amine dendrimers and the oxide with holes The mixing ratio of the graphene dispersion liquid is 0.13mg-1.3mg: 25-50ml.

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Abstract

The invention discloses a preparation method of dendritic macromolecule reinforced graphene oxide paper with holes, and belongs to the technical field of graphene oxide production. The invention aimsto solve the problems of low tensile strength and stress relaxation of a graphene oxide film / paper material and low quality of the finally prepared material due to impermeability of lamellas and the like. An epoxy functional group and adjacent carbon atoms thereof are eroded in a graphene oxide sheet layer through the strong oxidizing property of hydrogen peroxide to form nanoscale holes; polyamide-amine (PAMAM) dendritic polymer is introduced to form covalent cross-linking among graphene oxide sheet layers to improve the interlayer bonding strength of the graphene oxide; and finally, a graphene oxide film / paper material with relatively high strength and relatively good quality is obtained by means of directional filtering. The method is simple to operate, low in cost and high in efficiency, and is expected to realize large-scale preparation.

Description

technical field [0001] The invention belongs to the technical field of graphene oxide production, and in particular relates to a method for preparing graphene oxide paper with holes reinforced by dendritic macromolecules. Background technique [0002] Since graphene was officially discovered in 2004, graphene and its derived two-dimensional and three-dimensional functional components have attracted extensive attention due to their excellent mechanical properties, thermal conductivity, and electrical conductivity. At this stage, the simple and large-scale expansion of high-density, large-size, high-quality graphene / graphene oxide films and their functional derivative material products is very attractive for electronic and mechanical applications. However, due to the impermeability of graphene sheets to most gases and solvents, it is difficult to remove the air and solvents trapped between the layers during the preparation process, which poses a challenge to the manufacture of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L77/00C08K9/02C08K3/04C01B32/198
CPCC08J5/18C08J2377/00C08K9/02C08K3/042C01B32/198
Inventor 王超赵越赫晓东谭惠丰隋超吴凡赵一凡
Owner HARBIN INST OF TECH
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