Preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material

Abstract

The invention belongs to the technical field of graphene, and in particular relates to a preparation method of a silicon carbide-graphene-polytetrafluoroethylene composite material. The method comprises the steps of mixing graphene with methacryloxyethyltrimethyl ammonium chloride (DMC), and heating for carrying out a reaction so as to prepare noncovalent modified graphene powder; adding the noncovalent modified graphene powder, polytetrafluoroethylene powder and silicon carbide micro-powder into ethyl acetate, evenly mixing, drying and then molding by pressing so as to obtain the silicon carbide-graphene-polytetrafluoroethylene composite material. The composite material solves the problem of poor wear resistance of a polytetrafluoroethylene material, and has higher mechanical strength andexcellent conductivity.

Description

technical field

[0001] The invention belongs to the technical field of graphene, in particular to a method for preparing a silicon carbide-graphene-polytetrafluoroethylene composite material. Background technique

[0002] Graphene is a single-layer two-dimensional carbonaceous material composed of carbon atoms bonded by sp2 hybridization, and its basic structural unit is the most stable benzene six-membered ring (Electric field effect in atomically thincarbon films, Science, 2004, 306:666-669), is currently the most ideal two-dimensional nanomaterial. Graphene is the basic unit that constitutes other dimensional carbon materials. Graphene is wrapped to form zero-dimensional fullerenes; curled to form one-dimensional carbon nanotubes; superimposed to form three-dimensional graphite, forming zero-dimensional fullerenes, Complete systems from one-dimensional carbon nanotubes, two-dimensional graphene to three-dimensional diamond and graphite. In 2004, Andre Geim and Kostya No...

Examples

Embodiment 1

[0022] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0023] (1) Dissolve 3.5 parts by weight of graphene and 8 parts by weight of DMC in deionized water, heat up to 85°C, and stir and react at 1600r / min for 60min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 4000r / min, the centrifugation time is 15min, and it is washed repeatedly with deionized water, and then placed in an oven for 5h at 100°C to obtain non-covalently modified graphene powder;

[0024] (2) 3 parts by weight of non-covalently modified graphene powder, 100 parts by weight of polytetrafluoroethylene powder and 1.5 parts by weight of silicon carbide micropowder were added to ethyl acetate while stirring, and ultrasonically oscillated at a frequency of 60HZ for 120min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 80...

Embodiment 2

[0028] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0029] (1) Dissolve 4 parts by weight of graphene and 7.6 parts by weight of DMC in deionized water, heat up to 92°C, and stir and react at 1800r / min for 50min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 3500r / min, the centrifugation time is 20min, and repeatedly washed with deionized water, and then dried in an oven at 100°C for 8h to obtain non-covalently modified graphene powder;

[0030] (2) 4.6 parts by weight of non-covalently modified graphene powder, 105 parts by weight of polytetrafluoroethylene powder and 1.5 parts by weight of silicon carbide micropowder are added in ethyl acetate while stirring, and ultrasonically vibrated at a frequency of 65HZ for 110min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 85° C. for...

Embodiment 3

[0034] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0035] (1) Dissolve 4 parts by weight of graphene and 8 parts by weight of DMC in deionized water, heat up to 95°C, and stir and react at 1600r / min for 60min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 4000r / min, the centrifugation time is 18min, and it is washed repeatedly with deionized water, and then dried in an oven at 100°C for 8h to obtain non-covalently modified graphene powder;

[0036] (2) 5 parts by weight of non-covalently modified graphene powder, 100 parts by weight of polytetrafluoroethylene powder and 3 parts by weight of silicon carbide micropowder are added to ethyl acetate while stirring, and ultrasonically vibrated at a frequency of 65HZ for 100min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 80° C. for...

technical field

[0001] The invention belongs to the technical field of graphene, in particular to a method for preparing a silicon carbide-graphene-polytetrafluoroethylene composite material. Background technique

[0002] Graphene is a single-layer two-dimensional carbonaceous material composed of carbon atoms bonded by sp2 hybridization, and its basic structural unit is the most stable benzene six-membered ring (Electric field effect in atomically thincarbon films, Science, 2004, 306:666-669), is currently the most ideal two-dimensional nanomaterial. Graphene is the basic unit that constitutes other dimensional carbon materials. Graphene is wrapped to form zero-dimensional fullerenes; curled to form one-dimensional carbon nanotubes; superimposed to form three-dimensional graphite, forming zero-dimensional fullerenes, Complete systems from one-dimensional carbon nanotubes, two-dimensional graphene to three-dimensional diamond and graphite. In 2004, Andre Geim and Kostya No...

Examples

Embodiment 1

[0022] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0023] (1) Dissolve 3.5 parts by weight of graphene and 8 parts by weight of DMC in deionized water, heat up to 85°C, and stir and react at 1600r / min for 60min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 4000r / min, the centrifugation time is 15min, and it is washed repeatedly with deionized water, and then placed in an oven for 5h at 100°C to obtain non-covalently modified graphene powder;

[0024] (2) 3 parts by weight of non-covalently modified graphene powder, 100 parts by weight of polytetrafluoroethylene powder and 1.5 parts by weight of silicon carbide micropowder were added to ethyl acetate while stirring, and ultrasonically oscillated at a frequency of 60HZ for 120min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 80...

Embodiment 2

[0028] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0029] (1) Dissolve 4 parts by weight of graphene and 7.6 parts by weight of DMC in deionized water, heat up to 92°C, and stir and react at 1800r / min for 50min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 3500r / min, the centrifugation time is 20min, and repeatedly washed with deionized water, and then dried in an oven at 100°C for 8h to obtain non-covalently modified graphene powder;

[0030] (2) 4.6 parts by weight of non-covalently modified graphene powder, 105 parts by weight of polytetrafluoroethylene powder and 1.5 parts by weight of silicon carbide micropowder are added in ethyl acetate while stirring, and ultrasonically vibrated at a frequency of 65HZ for 110min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 85° C. for...

Embodiment 3

[0034] A preparation method of silicon carbide-graphene-polytetrafluoroethylene composite material, comprising the following steps:

[0035] (1) Dissolve 4 parts by weight of graphene and 8 parts by weight of DMC in deionized water, heat up to 95°C, and stir and react at 1600r / min for 60min to obtain a suspension, which is centrifuged and centrifuged The rotation speed is 4000r / min, the centrifugation time is 18min, and it is washed repeatedly with deionized water, and then dried in an oven at 100°C for 8h to obtain non-covalently modified graphene powder;

[0036] (2) 5 parts by weight of non-covalently modified graphene powder, 100 parts by weight of polytetrafluoroethylene powder and 3 parts by weight of silicon carbide micropowder are added to ethyl acetate while stirring, and ultrasonically vibrated at a frequency of 65HZ for 100min, A silicon carbide-graphene-polytetrafluoroethylene ethyl acetate mixed solution was obtained, and the mixed solution was dried at 80° C. for...