CN108609603A - A kind of carbon foam and preparation method thereof containing graphite ene coatings - Google Patents
A kind of carbon foam and preparation method thereof containing graphite ene coatings Download PDFInfo
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- CN108609603A CN108609603A CN201810591708.7A CN201810591708A CN108609603A CN 108609603 A CN108609603 A CN 108609603A CN 201810591708 A CN201810591708 A CN 201810591708A CN 108609603 A CN108609603 A CN 108609603A
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- graphene
- carbon foam
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/198—Graphene oxide
Abstract
The present invention is a kind of carbon foam containing graphite ene coatings, it is characterized in that the thickness of coating is 0.5 5 μm, graphene volume accounting is 20 30% in coating, the difference of the coefficient of thermal expansion of carbon foam matrix and coefficient of thermal expansion containing graphite ene coatings is less than 15%, carbon foam cell diameter is 50 200 μm, thermal conductivity is 0.036 0.685W/ (m/K), and density is 4.57 9.62kg/m3, compressive strength is 5 15MP, and porosity is more than 96%, and BET specific surface area is more than 250 600m2/g.The mechanical property of carbon foam can be effectively improved containing graphite ene coatings, heat-proof quality, increase specific surface area, provides abundant functional group, it is made to be with a wide range of applications in terms ofs catalyst carrier, heat-barrier material etc..
Description
Technical field
The present invention relates to a kind of preparation methods of foam, more particularly, to a kind of system of the carbon foam with graphene carbon coating
Preparation Method belongs to carbon material field.
Background technology
Carbon foam be it is a kind of by hole steep and be connected with each other hole steep that wall form have tridimensional network, in class it is spongy
Novel carbonaceous material, have low-density, high porosity, larger specific surface area, good absorption property, lower thermal expansion
The features such as coefficient and low thermal conductivity coefficient, it can be used as heat-barrier material, high-quality sandwich material, ability storage electrode, energy absorbing material,
Catalyst carrier and deodorization eliminating smell agent etc., in chemical industry, the fields such as aerospace and electronics have a wide range of applications value.
Graphene is a kind of two-dimensional material of monatomic thickness, since self-discovery, because of unique excellent electricity, optics and mechanics
Property and have wide application prospect, graphene oxide is a kind of important graphene generated during preparing graphene
Derivative, the graphene oxide modified by chemistry functional can be stably dispersed in a variety of common organic solvents, be formed
Stable graphene oxide suspension, surface of graphene oxide contain a large amount of oxygen activity groups, these groups assign graphite oxide
Some new characteristics of alkene, such as dispersibility, hydrophily, the compatibility with polymer, improve the heat resistance of polymer.
Application No. is the patents of CN 200680051980.1 to provide a kind of preparation of the carbon foam containing glass carbon coating
Method, be to be formed by being coated with a glass carbon coating to carbon foam, first make a kind of phenol or polyurethanes foam
Body is carbonized carbon foam is made in an inert atmosphere at high temperature, then by Foam machining at required shape, with a kind of fine carbon powder or
Graphite powder handles its surface, and then a kind of resin is administered on the carbon foam surface, cated carbon foam block is burnt
At making the resin carbonation at a kind of glassy state coating.
Application No. is the patents of CN 200710173126.9 to provide a kind of high-strength coal tar asphalt carbon foam material
Coal tar asphalt is prepared mesophase pitch by preparation method by pyrolysis, is added in toluene solution and is extracted after crushing, dry,
Add autoclave, vacuumize and be warming up to asphalt softening point or more and be filled with inert gas, in 350-500 DEG C of temperature and
It is kept for 120-240 minutes under the pressure of 6-80kg/cm2, releases stress, be cooled to room temperature, obtain asphalt foam material, by pitch
Carbon foam is made under 1300-1600 DEG C of nitrogen protection in carbon foam, and carbon foam compressive strength is more than 20MPa.
Application No. is the patents of CN 200910093957.4 to provide the carbon foam heat insulating material of addition hollow ceramic ball
Preparation method：Surfactant, foaming agent and hollow ceramic microspheres are added sequentially in phenolic resin by composition of raw materials, with machinery
The mode that stirring and supersonic oscillations are combined carries out mixture evenly dispersed；It is added into the mixture after being uniformly dispersed solid
Agent is poured into mold after stirring and foams and cure, obtains phenol formaldehyde foam；After phenol formaldehyde foam decladding is handled, it is put into true
In empty carbide furnace, 800 DEG C are heated to the rate of average 0.5 DEG C/min under vacuum, obtains carbon foam heat insulating material.It should
High temperature insulating material has the advantages that light weight, intensity is high, and thermal conductivity is low, and coefficient of thermal expansion is low, at low cost and designability
Carbon foam makes its application be restricted, foregoing invention due to its intensity is relatively low, frangible, toughness is insufficient disadvantage at present
Some thinkings for improving carbon foam mechanical property are given, the mechanics of carbon foam is improved by adding reinforced phase or coating
Performance achieves certain enhancing effect, and carbon foam can effectively be improved containing graphite ene coatings by being prepared on carbon foam surface
Mechanical property, heat-proof quality, increase specific surface area, abundant functional group be provided, make it in catalyst carrier, heat-barrier material etc.
Aspect be with a wide range of applications.
Invention content
The purpose of the present invention overcomes the shortcomings of the prior art, and provides a kind of carbon foam and its system of graphene-containing coating
Preparation Method, it is characterised in that the thickness of coating is 0.5-5 μm, and graphene volume accounting is 10-30%, carbon foam matrix in coating
Coefficient of thermal expansion and the difference of coefficient of thermal expansion containing graphite ene coatings be less than 15%, carbon foam cell diameter is 50-200 μ
M, thermal conductivity are 0.036-0.685W/ (m/K), density 4.57-9.62kg/m3, compressive strength 5-15MP, porosity is big
It is more than 250-600m in 96%, BET specific surface areas2/g。
A kind of preparation method of carbon foam containing graphene carbon coating includes the steps that following sequence：
(1) melamino-formaldehyde foam is first cleaned with acetone, is then cleaned for 10% ammonia spirit with mass fraction, then
Wash with distilled water, the dry 6-8h at 50-70 DEG C is then placed in baking oven；
(2) graphene powder is dispersed in water, supersonic oscillations 1-3h, forms graphene aqueous solution, graphene quality
Score is 5-10%, and graphene was the graphene oxide of 3500 mesh；
(3) in the resin solution that the prepared graphene aqueous solution of step (2) is added, first with 500-1000rpm rotating speeds
Finely dispersed mixed solution is made after carrying out mechanical agitation 1-2h, then supersonic oscillations 1-2h, mixed solution viscosity is 5-
8MPa s, resin are phenolic resin, epoxy resin or the two mixture；
(4) vacuum will be carried out in step (1) treated mixed solution that melamino-formaldehyde foam is put into step (3)
Impregnating by pressure, pressurize 0.5-2MPa, dwell time 1-3h；
(5) the melamine resin foam after impregnating step (4) is put into baking oven the dry 6- at 80-150 DEG C
10h；
(6) the melamine resin bubble by step (5) after dry, which is put into vacuum pyrolysis stove, is pyrolyzed, and vacuumizes
It is protection gas with the argon gas of flowing to 1-100Pa, is warming up to 450 DEG C -600 DEG C with 1-5 DEG C/min, is made and contains after heat preservation 1-3h
There is the carbon foam of graphene carbon coating.
The beneficial technical effect of the present invention lies in：
(1) density is low, thermal coefficient is low, compressive strength High Availabitity is in heat-barrier material interlayer and heat resistanceheat resistant blanket；(2) have
Higher specific surface area and abundant functional group can be used for catalytic industries；(3) coating and substrate combinating strength are high；(4) reduce heat
Volume contraction (4) preparation process is simple, at low cost in solution preocess.
Specific implementation mode
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention, after having read the present invention, various equivalences of the those skilled in the art to the present invention
It is as defined in the appended claims that the modification of form falls within the application.
Embodiment 1
A kind of carbon foam containing graphite ene coatings, it is characterised in that the thickness of coating is 2 μm, graphene volume in coating
Accounting is 22%, and the difference of the coefficient of thermal expansion of carbon foam matrix and the coefficient of thermal expansion containing graphite ene coatings is 11%, carbon bubble
Foam cell diameter is 80 μm, and thermal conductivity is 0.284W/ (m/K), density 5.68kg/m3, compressive strength 6.87MP, porosity
It is 98.4%, BET specific surface area is more than 307m2/g。
A kind of carbon foam containing graphene carbon coating, it is characterised in that preparation method includes the step of following sequence
Suddenly：
(1) carbon foam presoma is first cleaned with acetone, then with mass fraction be 10% ammonia spirit clean, then with steaming
Distilled water is cleaned, and is then placed in baking oven the dry 6.5h at 60 DEG C, the presoma of carbon foam is melamino-formaldehyde foam；
(2) graphene powder is dispersed in water, supersonic oscillations 2h, forms graphene aqueous solution, graphene quality point
Number is 8%, and graphene was the graphene oxide of 3500 mesh；
(3) in the resin solution that the prepared graphene aqueous solution of step (2) is added, machine is first carried out with 800rpm rotating speeds
Finely dispersed mixed solution is made after stirring 1h, then supersonic oscillations 2h in tool, and mixed solution viscosity is 6.4MPas, resin
For phenolic resin, epoxy resin or the two mixture；
(4) vacuum will be carried out in step (1) treated mixed solution that melamino-formaldehyde foam is put into step (3)
Impregnating by pressure, pressurize 1.5MPa, dwell time 1.5h；
(5) the melamine resin foam after impregnating step (4) is put into baking oven the dry 7h at 100 DEG C；
(6) the melamine resin bubble by step (5) after dry, which is put into vacuum pyrolysis stove, is pyrolyzed, and vacuumizes
It is protection gas with the argon gas of flowing to 60Pa, is warming up to 480 DEG C with 2 DEG C/min, is made after heat preservation 2.5h and contains graphene carbon
The carbon foam of coating.
Embodiment 2
A kind of carbon foam containing graphite ene coatings, it is characterised in that the thickness of coating is 4 μm, graphene volume in coating
Accounting is 23%, and the difference of the coefficient of thermal expansion of carbon foam matrix and the coefficient of thermal expansion containing graphite ene coatings is 10%, carbon bubble
Foam cell diameter is 90 μm, and thermal conductivity is 0.468W/ (m/K), density 7.46kg/m3, compressive strength 12.5MP, porosity
It is 98.9%, BET specific surface area is more than 427m2/g。
A kind of carbon foam containing graphene carbon coating, it is characterised in that preparation method includes the steps that following sequence：
(1) carbon foam presoma is first cleaned with acetone, then with mass fraction be 10% ammonia spirit clean, then with steaming
Distilled water is cleaned, and is then placed in baking oven the dry 7h at 65 DEG C, the presoma of carbon foam is melamino-formaldehyde foam；
(2) graphene powder is dispersed in water, supersonic oscillations 2h, forms graphene aqueous solution, graphene quality point
Number is 8%, and graphene was the graphene oxide of 3500 mesh；
(3) in the resin solution that the prepared graphene aqueous solution of step (2) is added, first with 500-1000rpm rotating speeds
Finely dispersed mixed solution is made after carrying out mechanical agitation 2h, then supersonic oscillations 1h, mixed solution viscosity is 7.4MPa
S, resin are phenolic resin, epoxy resin or the two mixture；
(4) vacuum will be carried out in step (1) treated mixed solution that melamino-formaldehyde foam is put into step (3)
Impregnating by pressure, pressurize 2MPa, dwell time 3h；
(5) the melamine resin foam after impregnating step (4) is put into baking oven the dry 8h at 100 DEG C；
(6) the melamine resin bubble by step (5) after dry, which is put into vacuum pyrolysis stove, is pyrolyzed, and vacuumizes
It is protection gas with the argon gas of flowing to 90Pa, is warming up to 450 DEG C -600 DEG C with 3 DEG C/min, is made after heat preservation 3h and contains graphite
The carbon foam of olefinic carbon coating.
Two specific implementation modes of the invention are above are only, but the design concept of the present invention is not limited thereto, all utilizations
This design carries out the present invention change of unsubstantiality, should all belong to the behavior for invading the scope of protection of the invention.In every case it is not
It is detached from the content of technical solution of the present invention, according to the technical essence of the invention to any type of simple made by above example
Modification, equivalent variations and remodeling, still fall within the protection domain of technical solution of the present invention.
Claims (2)
1. a kind of carbon foam containing graphite ene coatings, it is characterised in that the thickness of coating is 0.5-5 μm, graphene body in coating
Accounting is accumulated as 20-30%, the difference of the coefficient of thermal expansion of carbon foam matrix and the coefficient of thermal expansion containing graphite ene coatings is less than
15%, carbon foam cell diameter is 50-200 μm, and thermal conductivity is 0.036-0.685W/ (m/K), density 4.57-9.62kg/
m3, compressive strength 5-15MP, for porosity more than 96%, BET specific surface area is more than 250-600m2/g。
2. a kind of carbon foam containing graphene carbon coating according to claim 1, it is characterised in that preparation method includes
The step of following sequence：
(1) melamino-formaldehyde foam is cleaned, is then cleaned for 10% ammonia spirit with mass fraction, then clear with distilled water
It washes, is then placed in baking oven the dry 6-8h at 50-70 DEG C；
(2) graphene powder is dispersed in water, supersonic oscillations 1-3h, forms graphene aqueous solution, graphene mass fraction
For 5-10%, graphene was the graphene oxide of 3500 mesh；
(3) it in the resin solution that the prepared graphene aqueous solution of step (2) is added, is first carried out with 500-1000rpm rotating speeds
Finely dispersed mixed solution is made after mechanical agitation 1-2h, then supersonic oscillations 1-2h, mixed solution viscosity is 5-8MPa
S, resin are phenolic resin, epoxy resin or the two mixture；
(4) vacuum pressed will be carried out in step (1) treated mixed solution that melamino-formaldehyde foam is put into step (3)
Dipping, pressurize 0.5-2MPa, dwell time 1-3h；
(5) the melamine resin foam after impregnating step (4) is put into baking oven the dry 6-10h at 80-150 DEG C；
(6) the melamine resin bubble by step (5) after dry, which is put into vacuum pyrolysis stove, is pyrolyzed, and is evacuated to 1-
100Pa, is protection gas with the argon gas of flowing, is warming up to 450 DEG C -600 DEG C with 1-5 DEG C/min, keeps the temperature furnace cooling system after 1-3h
Obtain the carbon foam containing graphene carbon coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810591708.7A CN108609603B (en) | 2018-05-27 | 2018-05-27 | Carbon foam containing graphene coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810591708.7A CN108609603B (en) | 2018-05-27 | 2018-05-27 | Carbon foam containing graphene coating and preparation method thereof |
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| CN108609603A true CN108609603A (en) | 2018-10-02 |
| CN108609603B CN108609603B (en) | 2022-03-22 |
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| CN201810591708.7A Active CN108609603B (en) | 2018-05-27 | 2018-05-27 | Carbon foam containing graphene coating and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437147A (en) * | 2018-10-31 | 2019-03-08 | 石狮市川大先进高分子材料研究中心 | A kind of preparation method of multifunctional C foam |
| CN109721945A (en) * | 2019-01-16 | 2019-05-07 | 苏州宏久航空防热材料科技有限公司 | A kind of high-dielectric constant inorganic foamed resin based composites substrate and preparation method thereof |
| CN112823441A (en) * | 2018-10-29 | 2021-05-18 | 中国石油化工股份有限公司 | Porous composite material capable of generating electric arc in microwave field and preparation method and application thereof |
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| CN104151775A (en) * | 2014-08-01 | 2014-11-19 | 天津工业大学 | Preparation method of three-dimensional cross-linked graphene foam structure reinforced resin composite material |
| CN104591131A (en) * | 2015-01-27 | 2015-05-06 | 航天材料及工艺研究所 | Preparation method of high-thermal-conductivity graphene-enhanced foamy carbon |
| CN106783198A (en) * | 2016-11-18 | 2017-05-31 | 上海应用技术大学 | A kind of carbon foam combination electrode material of three dimensional elasticity N doping and preparation method thereof |
| US20170182474A1 (en) * | 2015-12-28 | 2017-06-29 | Aruna Zhamu | Integral 3D graphene-carbon hybrid foam and devices containing same |
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Patent Citations (4)
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| CN104151775A (en) * | 2014-08-01 | 2014-11-19 | 天津工业大学 | Preparation method of three-dimensional cross-linked graphene foam structure reinforced resin composite material |
| CN104591131A (en) * | 2015-01-27 | 2015-05-06 | 航天材料及工艺研究所 | Preparation method of high-thermal-conductivity graphene-enhanced foamy carbon |
| US20170182474A1 (en) * | 2015-12-28 | 2017-06-29 | Aruna Zhamu | Integral 3D graphene-carbon hybrid foam and devices containing same |
| CN106783198A (en) * | 2016-11-18 | 2017-05-31 | 上海应用技术大学 | A kind of carbon foam combination electrode material of three dimensional elasticity N doping and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112823441A (en) * | 2018-10-29 | 2021-05-18 | 中国石油化工股份有限公司 | Porous composite material capable of generating electric arc in microwave field and preparation method and application thereof |
| CN112823441B (en) * | 2018-10-29 | 2023-03-24 | 中国石油化工股份有限公司 | Porous composite material capable of generating electric arc in microwave field and preparation method and application thereof |
| CN109437147A (en) * | 2018-10-31 | 2019-03-08 | 石狮市川大先进高分子材料研究中心 | A kind of preparation method of multifunctional C foam |
| CN109721945A (en) * | 2019-01-16 | 2019-05-07 | 苏州宏久航空防热材料科技有限公司 | A kind of high-dielectric constant inorganic foamed resin based composites substrate and preparation method thereof |
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