CN106564878A - Preparation method for carbon nano tube heat conducting film - Google Patents
Preparation method for carbon nano tube heat conducting film Download PDFInfo
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- CN106564878A CN106564878A CN201610971480.5A CN201610971480A CN106564878A CN 106564878 A CN106564878 A CN 106564878A CN 201610971480 A CN201610971480 A CN 201610971480A CN 106564878 A CN106564878 A CN 106564878A
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- carbon nano
- nano tube
- heat conducting
- cnt
- conducting film
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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
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/24—Thermal properties
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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
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/30—Purity
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- Compositions Of Macromolecular Compounds (AREA)
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Abstract
A preparation method for a carbon nano tube heat conducting film includes the following steps that firstly, a carbon nano tube is subjected to heat preservation for 24 h at 2800 DEG C, and graphitization treatment is performed; secondly, a dispersing agent is added into the graphitized carbon nano tube, the carbon nano tube is evenly dispersed in deionized water or an NMP solvent by means of ball milling and ultrasonic or high-speed shearing, and the content of the carbon nano tube in dispersion liquid is 2-5%; thirdly, the carbon nano tube dispersion liquid is coated on aluminum foil or copper foil, and by means of bubbling or acid corrosion, a carbon nano tube thin film is stripped; and fourthly, the carbon nano tube thin film is subjected to carbonization treatment at 500-1500 DEG C and then is subjected to graphitization treatment at 2300-3000 DEG C, rolling is performed, and the carbon nano tube flexible heat conducting film is obtained. According to the preparation method, by performing the graphitization treatment on the carbon nano tube to remove catalyst impurities of the carbon nano tube, the degree of crystallinity is improved, the carbonization and graphitization treatment is performed on the carbon nano tube film to remove a binding agent, the heat conduction performance is improved, and the shape and the thickness of the carbon nano tube heat conducting film are controllable.
Description
Technical field
The present invention relates to CNT application and preparation field, more particularly, it relates to a kind of CNT heat conducting film and its
Preparation method.
Background technology
With the development of electronic technology, there is large-scale integrated in electronic circuit, and integrated produced heat is difficult in time
Disperse, affect the life-span of components and parts.The coefficient of heat conduction that CNT has excellent thermal property, multi-walled carbon nano-tubes exceedes
3000W/mk, higher than natural diamond and the coefficient of heat conduction of graphite atom basal plane（2000W/m·K）.While CNT
Thermodynamic stability with height, excellent property makes CNT become a kind of good Heat Conduction Material, is widely used in electricity
Many fields such as son, Aero-Space.
The content of the invention
The purpose of the present invention is to propose to a kind of preparation method of CNT heat conducting film.
A kind of this preparation method of CNT heat conducting film of the present invention, comprises the following steps.
（1）Graphitization processing：The catalyst impurities for removing CNT and the degree of crystallinity for improving CNT, so as to increase
Plus electric conductivity.By CNT in 2800 DEG C, insulation 24h, graphitization processing is carried out, taken out after cooling.
（2）Graphited CNT, after adding dispersant, by the one kind in ball milling, ultrasound or high speed shear technique
Or various ways by CNT in deionized water or NMP（1-METHYLPYRROLIDONE）It is dispersed in equal solvent, dispersion liquid
Middle content of carbon nanotubes is 2%-5%.
（3）The carbon nano tube dispersion liquid of preparation is coated on aluminium foil or Copper Foil, by doing for bubbling or acid corrosion
Method peels off carbon nano-tube film from aluminium foil or Copper Foil, obtains carbon nano-tube film.
（4）By carbon nano-tube film in 500-1500 DEG C of carbonization treatment, then through 2300-3000 DEG C of graphitization processing, most
After roll, obtain carbon nano tube flexible heat conducting film.
Step（2）The middle dispersant for adopting for：Lauryl sodium sulfate, neopelex, dodecyl front three
Base ammonium bromide, Triton100 (i.e. Triton X-100s）Or the one kind in polyethylene glycol.
The present invention can adjust the thickness of heat conducting film by adjusting the concentration of carbon nano tube dispersion liquid or the number of times of coating.
Compared with prior art, the present invention passes through graphitization processing CNT, eliminates the catalyst of CNT
Impurity, improves degree of crystallinity, while the carbon nano-tube film to preparing is carbonized and graphitization processing, eliminates bonding agent, carries
High heat conductivility.The CNT heat conducting film shape and thickness of the present invention is controllable.
Specific embodiment
The present invention will be further described by following examples.But the scope of protection of present invention is not limited to
In the following examples.
Embodiment 1.
（1）CNT 1000g is taken, 2800 DEG C are to slowly warm up in graphitization, be incubated 24h, slow cooling takes out.
（2）The CNT 0.5g of graphitization processing, NMP 9.35g, Triton100 0.15g are taken, by the side of ball milling
Formula makes carbon nano tube dispersion liquid.
（3）Carbon nano tube dispersion liquid is coated on aluminium foil, at 60 DEG C dry, by Bubbling method by film from aluminium foil
Peel.
（4）Film is dried, then 1200 DEG C of charings in retort, then 2900 DEG C of graphitization processings of Jing again, after rolling
Obtain CNT heat conducting film.
Embodiment 2.
（1）CNT 1000g is taken, 2800 DEG C are to slowly warm up in graphitization, be incubated 24h, slow cooling takes out.
（2）The CNT 0.5g of graphitization processing is taken, deionized water 9.35g, lauryl sodium sulfate 0.15g is led to
The mode for crossing ball milling makes carbon nano tube dispersion liquid.
（3）Carbon nano tube dispersion liquid is coated on Copper Foil, is dried at 60 DEG C, by acid corrosion method by film from aluminium foil
On peel.
（4）Film is dried, then 800 DEG C of charings in retort, then 2800 DEG C of graphitization processings of Jing again, after rolling
To CNT heat conducting film.
Claims (2)
1. a kind of preparation method of CNT heat conducting film, is characterized in that comprising the following steps：
（1）Graphitization processing：By CNT in 2800 DEG C, insulation 24h, graphitization processing is carried out, taken out after cooling；
（2）Graphited CNT, add dispersant after, by ball milling, ultrasound or high speed shear technique in one kind or
Various ways are dispersed in deionized water or 1-METHYLPYRROLIDONE solvent by CNT, and CNT contains in dispersion liquid
Measure as 2%-5%；
（3）The carbon nano tube dispersion liquid of preparation is coated on aluminium foil or Copper Foil, by bubbling or the method for acid corrosion, will
Carbon nano-tube film is peeled off from aluminium foil or Copper Foil, obtains carbon nano-tube film；
（4）By carbon nano-tube film in 500-1500 DEG C of carbonization treatment, then through 2300-3000 DEG C of graphitization processing, finally roll
System, obtains carbon nano tube flexible heat conducting film；
Step（2）The middle dispersant for adopting for：Lauryl sodium sulfate, neopelex, trimethyl bromine
Change the one kind in ammonium, Triton X-100 or polyethylene glycol.
2. a kind of preparation method of CNT heat conducting film according to claim 1, is characterized in that by adjusting carbon nanometer
The concentration of pipe dispersion liquid or the number of times of coating are adjusting the thickness of heat conducting film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610971480.5A CN106564878A (en) | 2016-11-07 | 2016-11-07 | Preparation method for carbon nano tube heat conducting film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610971480.5A CN106564878A (en) | 2016-11-07 | 2016-11-07 | Preparation method for carbon nano tube heat conducting film |
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| Publication Number | Publication Date |
|---|---|
| CN106564878A true CN106564878A (en) | 2017-04-19 |
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| CN201610971480.5A Pending CN106564878A (en) | 2016-11-07 | 2016-11-07 | Preparation method for carbon nano tube heat conducting film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059151A (en) * | 2017-05-16 | 2018-05-22 | 江苏天奈科技股份有限公司 | A kind of Carbon nano-tube dispersant and preparation method thereof |
| CN112174117A (en) * | 2020-09-01 | 2021-01-05 | 深圳市德方纳米科技股份有限公司 | Method for purifying carbon nanotubes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602118A (en) * | 2012-02-23 | 2012-07-25 | 苏州汉纳材料科技有限公司 | Transfer printing method of carbon nanotube thin film |
| CN102944315A (en) * | 2012-11-06 | 2013-02-27 | 沈阳航空航天大学 | Temperature sensor preparation method based on carbon nano tube three-dimensional network film |
| CN105047940A (en) * | 2015-06-16 | 2015-11-11 | 南昌大学 | Preparation method of carbon nanotube film |
| CN105047941A (en) * | 2015-06-24 | 2015-11-11 | 南昌大学 | Preparation method of aluminum/copper foil coated with carbon nanotube film |
| CN105514434A (en) * | 2016-01-19 | 2016-04-20 | 南昌大学 | Preparation method of whisker-shaped carbon nano tube film |
-
2016
- 2016-11-07 CN CN201610971480.5A patent/CN106564878A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602118A (en) * | 2012-02-23 | 2012-07-25 | 苏州汉纳材料科技有限公司 | Transfer printing method of carbon nanotube thin film |
| CN102944315A (en) * | 2012-11-06 | 2013-02-27 | 沈阳航空航天大学 | Temperature sensor preparation method based on carbon nano tube three-dimensional network film |
| CN105047940A (en) * | 2015-06-16 | 2015-11-11 | 南昌大学 | Preparation method of carbon nanotube film |
| CN105047941A (en) * | 2015-06-24 | 2015-11-11 | 南昌大学 | Preparation method of aluminum/copper foil coated with carbon nanotube film |
| CN105514434A (en) * | 2016-01-19 | 2016-04-20 | 南昌大学 | Preparation method of whisker-shaped carbon nano tube film |
Non-Patent Citations (2)
| Title |
|---|
| LIANGBING HU ET AL: ""Highly conductive paper for energy-storage devices"", 《PNAS》 * |
| 姜兆华等: "《应用表面化学》", 28 February 2009 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059151A (en) * | 2017-05-16 | 2018-05-22 | 江苏天奈科技股份有限公司 | A kind of Carbon nano-tube dispersant and preparation method thereof |
| CN108059151B (en) * | 2017-05-16 | 2022-08-30 | 江苏天奈科技股份有限公司 | Carbon nano tube dispersant and preparation method thereof |
| CN112174117A (en) * | 2020-09-01 | 2021-01-05 | 深圳市德方纳米科技股份有限公司 | Method for purifying carbon nanotubes |
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Application publication date: 20170419 |