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Preparation method of porous graphene flexible foam

A porous graphene and elastic foam technology, applied in the field of graphene foam preparation, can solve the problems of high cost, complicated preparation process, and harsh conditions of graphene foam, achieve good elastic modulus, simple operation method, and convenient preparation process fast effect

Inactive Publication Date: 2015-03-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require harsh conditions to obtain graphene foams, the preparation process is complicated, and the cost is high.

Method used

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  • Preparation method of porous graphene flexible foam
  • Preparation method of porous graphene flexible foam
  • Preparation method of porous graphene flexible foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, weigh 160mg of graphite oxide prepared by the improved Hummers method, put it in a 100mL beaker, then make a dispersion with a concentration of 4mg / mL with 40mL of deionized water, and then put the beaker into an ultrasonic bath for 2h Strip graphite oxide into graphene oxide to obtain 40mL of uniformly dispersed graphene oxide solution; use a 250mL sand core filter device to vacuum filter, add a layer of mixed fiber with a pore size of 0.22μm on the sand core of the sand core funnel at room temperature prime filter membrane, fix the device and connect the vacuum pump, pour the dispersed graphene oxide solution, and vacuum filter for 48 hours to obtain the graphene oxide film; remove the above-mentioned graphene oxide film and mixed cellulose filter membrane adsorbed together Put it into a petri dish with a diameter of 90 mm, add a volume fraction of 50% hydroiodic acid for reduction for 2 hours, wash with deionized water for 3-5 times, and dry natur...

Embodiment 2

[0034] At room temperature, weigh 120mg of graphite oxide prepared by the improved Hummers method, put it in a 100mL beaker, then make a dispersion with a concentration of 3mg / mL with 40mL of deionized water, and then put the beaker into an ultrasonic bath for 1h Strip graphite oxide into graphene oxide to obtain 40mL of uniformly dispersed graphene oxide solution; use a 250mL sand core filter device to vacuum filter, add a layer of mixed fiber with a pore size of 0.22μm on the sand core of the sand core funnel at room temperature The plain filter membrane, fix the device and connect the vacuum pump, pour the dispersed graphene oxide solution, and vacuum filter for 48 hours to obtain the graphene oxide film; remove the above-mentioned graphene oxide film and mixed cellulose filter membrane adsorbed together Put it into a petri dish with a diameter of 90 mm, add a volume fraction of 50% hydroiodic acid for reduction for 2 hours, wash with deionized water for 3-5 times, and dry n...

Embodiment 3

[0036] At room temperature, weigh 160mg of graphite oxide prepared by the improved Hummers method, put it in a 100mL beaker, then make a dispersion with a concentration of 4mg / mL with 40mL of deionized water, and then put the beaker into an ultrasonic bath for 2h Strip graphite oxide into graphene oxide to obtain 40mL of uniformly dispersed graphene oxide solution; use a 250mL sand core filter device to vacuum filter, add a layer of mixed fiber with a pore size of 0.22μm on the sand core of the sand core funnel at room temperature The plain filter membrane, fix the device and connect the vacuum pump, pour the dispersed graphene oxide solution, and vacuum filter for 48 hours to obtain the graphene oxide film; remove the above-mentioned graphene oxide film and mixed cellulose filter membrane adsorbed together Put it into a petri dish with a diameter of 90 mm, add hydriodic acid with a volume fraction of 50% to reduce it for 2 hours, wash it with deionized water for 3-5 times, and...

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Abstract

The invention relates to a preparation method of porous graphene flexible foam, which comprises the following steps: adding graphite oxide prepared by an improved Hummers method into distilled water to obtain a graphite oxide dispersion liquid, conducting ultrasonic dispersion to obtain a graphene oxide solution, and conducting vacuum filtration to obtain a graphene oxide film; reducing the graphene oxide film with a hydroiodic acid solution, and conducting washing and drying to obtain a graphene film; exposing the graphene film to infrared laser to obtain the porous graphene flexible foam. The preparation method provided by the invention is simple, and the prepared porous graphene flexible foam has a continuous three-dimensional porous structure, lower density and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of preparation of graphene foams, in particular to a preparation method of porous graphene elastic foams. Background technique [0002] Since British physicists successfully prepared graphene in 2004, its special two-dimensional structure and excellent performance have attracted the attention of many researchers. Studies have shown that graphene is composed of carbon atoms with SP 2 A new material with a single-layer sheet structure composed of a regular hexagonal periodic honeycomb lattice structure composed of a hybrid. The thickness of a two-dimensional single-layer graphene with only one carbon atom thickness is about 0.35nm. The single-layer graphene has a high Transparency and thermal conductivity, hardness, high electrical conductivity and other characteristics. Two-dimensional graphene can form three-dimensional graphite, one-dimensional carbon nanotubes, and zero-dimensional fullerenes by stacking, winding,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 王宏志时秋伟李耀刚张青红
Owner DONGHUA UNIV
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