CN105636903B - Ceramic coating graphite manufacture method - Google Patents
Ceramic coating graphite manufacture method Download PDFInfo
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- CN105636903B CN105636903B CN201480041396.2A CN201480041396A CN105636903B CN 105636903 B CN105636903 B CN 105636903B CN 201480041396 A CN201480041396 A CN 201480041396A CN 105636903 B CN105636903 B CN 105636903B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
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- C01B32/00—Carbon; Compounds thereof
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Abstract
The present invention is to include graphite（A）；With in as above graphite（A）Side on chemically combined ceramics（B）, being provided by using sol-gal process has 108To 1016The ceramic coating graphite manufacture method of/sq scope electric insulating qualities.
Description
Technical field
The present invention is economic synthetically produced method on ceramic coating graphite is simple.
Background technology
Due to the raising with electric property with increase caloric value therefore with increase operating temperature drop performance and will
Thermal expansion destroys printed circuit board (PCB) etc. repeatedly turns into hot issue.The most of electrical equipment lid used in electrical equipment is macromolecule
Polymer, the whole world are outside effectively by electrical equipment internal heat generation just in test by the low thermal conductivity increase of this high molecule plastic
Excretion.
Such purpose, in order that by the use of heat release high molecular polymer as electrical equipment electrical equipment lid, this plastics is non-solely to need height to lead
Hot factor v and the outstanding electric insulating quality of needs.Therefore, it is necessary to the filler of high thermal conductivity coefficient and outstanding electric insulating quality.Profit
With always technology, the ceramics exploitation thermal conductivity factor that electric insulating quality is coated to graphite is very outstanding and electric insulating quality is also very excellent
Elegant filler.But in order to be uniformly coated with ceramics to graphite surface, there is the engineering for reforming graphite surface in manufacture method.This
Must be with drying engineering after engineering, complete this is just to elongate engineering time and complicated, as a result productivity is lower.Therefore, in order to
Continuous a large amount of production ceramic coating graphite need simpler engineering method.
Republic of Korea registered patent publication 10-0895521 delivers the carbon nano tube transparent conducting film using spray-painting
And this manufacture method.
Preparation applies after ceramic coating graphite manufacture method always mixes with solvent using CNT, dispersant and be scattered
The level of layer solution；And including spraying pressure 0.05 in matrix to 60kgf/cm2Spraying as above coating solution, this dries level,
Feature is that the parts by weight of content of carbon nanotubes coating solution gross weight 100 contrast 0.01 to 20 parts by weight in as above coating solution
's.
But always ceramic coating graphite manufacture method has high cost problem and low Profit Margin.Because sprayed in mother metal
Person's marking ink coating relief mother metal take advantage of plasticity, method of drying etc. do titration just obtain coating product cause engineering very complicated and
And many management factors occur in each engineering.
The content of the invention
Technical task
The present invention is that engineering will provide productivity and economy is very high and with outstanding thermal conductivity factor and electrically by simplifying
The manufacture method of the ceramic coating graphite of insulating properties.
Solves the method for problem
The present invention is to include graphite (A)；With on as above graphite (A) side it is chemically combined ceramics (B), by using
Sol-gel process, which provides, has 108To 1016The ceramic coating graphite manufacture method of Ω/sq scope electric insulating qualities.
In the case of as above graphite coats ceramics, pyrene derivatives can be added as dispersant.
Moreover provide following ceramic coating graphite manufacture method.
The graphite of average diameter 10nm to 1000 μm of addition in 0.1 to 20 parts by weight is contrasted in the parts by weight of spirit solvent 100
(A) 1 minute to 5 minutes fully dispersed level (a levels)；Addition base catalyst does titration on as above scattered solution
PH9 to 12 level (b levels)；And the ceramics precursor ripple to be applied is added on the solution of as above graphite dispersion.Now, addition pottery
Porcelain fore-runner coats the layer of ceramic (B) to graphite surface after the parts by weight of graphite 100 10 to 300 parts by weight of contrast based on such as upslide
Secondary (c levels).
As above pyrene derivatives can be being added on C levels as dispersant.
The effect of invention
Graphite surface can be omitted in the case of the few graphite matrix of aspect ratio used according to the invention and reforms engineering, due to engineering
Simplify, therefore improve productivity and high economy.And it is electrically exhausted that the dispersed ceramics increase of pyrene derivatives is added on ceramics
Edge.
Brief description of the drawings
Fig. 1 is with coating pottery using sol-gel process according on the small aspect ratio graphite of the present invention by the big graphite of aspect ratio
Ideograph when porcelain.
Fig. 2 is that the sample that silica is applied on small aspect ratio graphite amplifies 100000 times of Walkthrough shape electron microscopes clapped
Photo.
Fig. 3 is that the sample that silica is applied on the big graphite of aspect ratio amplifies 100000 times of Walkthrough shape electron microscopics clapped
Mirror photo.
Fig. 4 be first added on small aspect ratio graphite pyrene derive after apply silica sample amplify 100000 times bat walk
Look into shape electron micrograph.
Embodiment
For the optimal form that carries out an invention
The present invention is on including graphite (A)；With the ceramics (B) chemically combined on as above graphite (A) side, lead to
Cross has 10 using sol-gel process manufacture8To 1016The ceramic coating graphite of Ω/sq scope electric insulating qualities, as above graphite
Feature is by aspect ratio 10:1 to 200:1 composition group in be chosen ellipse, it is as above ceramic the characteristics of be by magnesia, oxidation
Aluminium, zinc oxide, zirconium oxide and silica composition group in more than a kind be chosen, there is provided ceramic coating graphite.Coated to graphite
Graphite surface can be omitted in the engineering of ceramics and reforms engineering.
For the form to carry out an invention
The present invention is graphite (A) and hybrid ceramic (B) and pyrene derivatives on the side face defects part of as above graphite (A)
(C) chemical bond is caused.But it is to provide using sol-gel process and with 108To 1016The graphite that the ceramics of Ω/sq resistance apply
Manufacture method.
Moreover the present invention includes following level and provides ceramic coating graphite manufacture method.
The graphite of average diameter 10nm to 1000 μm of addition in 0.1 to 70 parts by weight is contrasted in the parts by weight of spirit solvent 100
(A) 1 minute to 5 minutes fully dispersed level (a levels)；Addition base catalyst does titration on as above scattered solution
PH9 to 12 level (b levels)；And the ceramics precursor ripple to be applied is added on the solution of as above graphite dispersion.Now, addition pottery
Porcelain fore-runner coats the layer of ceramic (B) to graphite surface after the parts by weight of graphite 100 10 to 300 parts by weight of contrast based on such as upslide
Secondary (c levels).
As above graphite is by aspect ratio 10:1 to 200:1 composition group in be chosen oval graphite, as above ceramics be by
Magnesia, aluminum oxide, zinc oxide, zirconium oxide and silica composition group in more than a kind be chosen.
In the case of coating ceramics to graphite, the pyrene derivatives of following chemical formula 1 can be as above being added on graphite as scattered
Agent.
Chemical formula 1
As above on chemical formula 1, R is by carboxylic acid, (C1To C10) alkyl carboxylic acid, amine, (C1To C10) alkylamine, (C1To C10) alkane
Yl carboxylic acid halogen, (C1To C10) alkyl carboxylic acid hydrazides and (C1To C10) alkyl carboxylic acid N-hydroxy-succinamide ester composition group
It is interior optional.
Moreover as above pyrene derivatives be by as above pyrene derivatives or pyrene derivatives salt be by 1-pyrenebutyryl chlorinations,
1-pyrenebutyryl hydrazides, 1-pyrenemethylamine hydrochlorides, 1-pyrenecarboxylic acid, 1-
Pyrenevaleric acid, 1- pyrene acid N- hydroxysuccinimidyls, γ oxos -1- pyrenes butyric acid in the group of 1- pyrenes butyric acid composition with being chosen
Perhaps more than a kind pyrene derivatives.
In the embodiment of the present invention, as above the as above alcoholic solution of a levels is by methanol, ethanol, propyl alcohol, butanol, third
Optional more than a kind in the group that ketone, toluene, dimethylformamide and dimethylbenzene form, titration pH alkalescence is as above done on a levels
Catalyst type is by ammonium hydroxide, 4-propyl ammonium chloride, TPAOH, potassium hydroxide, TBAB, four fourths
Ammonium chloride is not but to this restriction with optional one kind or two or more in the group of tetrabutylammonium hydroxide composition.
Moreover as above the as above graphite of c levels can be that the parts by weight of ethanol 100 contrast 0.1 to 70 parts by weight, 5 to 50 weights
Part or 10 to 40 parts by weight are measured, as above ceramics precursor ripple can be that as above the parts by weight of graphite 100 contrast 10 to 300 parts by weight, 10
But it is not to this restriction to 250 parts by weight or 15 to 300 parts by weight.
As above the pyrene derivatives of c levels can add the as above parts by weight of graphite 100 and contrast 1 to 100 parts by weight.
The present invention other embodiment on, as above ceramics precursor ripple be by magnesia fore-runner aluminum oxide fore-runner, oxidation
It is optional one kind or two or more in the group of zinc precursor ripple, zirconium oxide fore-runner and two SiClx forerunner's wave components, but it is not to this limit
Fixed.
As above magnesia fore-runner is by magnesium nitrate (Mg (NO3)2·6H2O), magnesium acetate 4 hydrate (magnesium
Acetate tetrahydrate) with magnesium methoxide (magnesium methoxide) composition group in it is optional one kind or two or more
, as above aluminum oxide precursor ripple is by aluminum nitrate nonahydrate (aluminum nitrate nonahydrate), aluminium isopropoxide
Optional a kind or 2 in the group that (aluminum isopropoxide) forms with aluminium secondary butylate (aluminum sec-butoxide)
Kind above quilt, as above zinc oxide precursor ripple is a kind in zinc nitrate (zinc nitrate) or zinc acetate (zinc acetate)
It is chosen above, zirconium oxide fore-runner is by (ZrO (NO3)2·2H2O, zirconium (NO3)2·xH2) and n-propoxyzirconium O
Optional a kind or two or more in the group of (zirconium n-propoxide) composition, as above silica fore-runner is by third
Ethyl triethoxy silicane alkane (APTES), propyl trimethoxy silicane (APTMS), 3- sulfydryls (MPTES), 3- mercaptopropyis
(MPTMS), can in the group that tetraethyl orthosilicate (TEOS), original quanmethyl silicate (TMOS) form with silicon tetrapropyl acetoacetic ester (TPOS)
Select it is one kind or two or more, be not but to this restriction.
In the other implementation column of the present invention, as above coating is from 6 in 15 to 80 DEG C, 15 to 75 DEG C or 20 to 80 DEG C temperature
It can be reacted to 24 hours.
Moreover, there is provided the weight % of set meal coating graphite 10 to 98 that manufactures method manufactured as above and Markite 2 to
90 weight % are kneaded the manufacture method in the high thermal conductivity coefficient plastics of normal temperature to 350 DEG C.
In more detail, the vertical of size 10nm to 1000 μm of addition in 0.1 to 70 parts by weight is contrasted in the parts by weight of spirit solvent 100
It is horizontal to compare 10:1 to 200:Less than 1 oval graphite 1 minute to 5 minutes is fully dispersed.As above addition alkalescence is urged on scattered solution
Agent titrates pH9 to 12 to do.The ceramics precursor ripple addition that will be applied on the fully dispersed solution of as above graphite afterwards is based on
The parts by weight of graphite 100 such as upslide to graphite surface coat ceramics after contrasting 10 to 300 parts by weight.Now, according to sol-gel
Condition, fore-runner amount, the species of method can adjust ceramic form, amount, uniformity and the thickness that ceramics are applied on graphite surface, can adjust
The thermal conductivity factor and electric insulating quality of ceramic coating graphite obtained by whole.
Moreover as above in the parts by weight of graphite 100, the parts by weight of pyrene derivatives 1 to 100 as dispersant can be added.
Increase electric insulating quality and ceramics precursor ripple when hybrid ceramic fore-runner is coated with pyrene derivatives and uniformly point spread and coat
.
Hereinafter, in order to help to understand the present invention, described in detail for embodiment.The unlimited row of fixing of the scope of the invention are implemented
Example, Yi following Examples are present invention of illustrating.In order to help when the intellectual of industry work provides the reality of the present invention
Example.
《Embodiment 1》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, KS6) 1g of 6 μm of size, to 2 points
After clock stirring, addition ammonia spirit is untill pH11.Afterwards, after TEOS to the 12 hour stirring for adding 1.2g, filtering is passed through
Silica dioxide coating graphite has been manufactured with drying engineering.
《Embodiment 2》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, KS6) 10g of 6 μm of size, to 2
After minute stirring, addition ammonia spirit is untill pH11.Afterwards, after TEOS to the 12 hour stirring for adding 12g, filtering is passed through
Silica dioxide coating graphite has been manufactured with drying engineering.
《Embodiment 3》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, KS6) 15g of 6 μm of size, to 2
After minute stirring, addition ammonia spirit is untill pH11.Afterwards, after adding 18g TEOS and then being stirred to 12 hours, pass through
Filtering has manufactured silica dioxide coating graphite with drying engineering.
Amplify 100000 times using Walkthrough shape electron microscope manufacture silica dioxide coating graphite surface is taken pictures, on Fig. 2
Write down result.
《Embodiment 4》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, the KS6) 15g and pyrene of 6 μm of size
The 1-pyrenecarboxylic acid 3g of derivative, to after stirring in 2 minutes, addition ammonia spirit is untill pH11.Afterwards, add
After 18g TEOS to 12 hour stirring, silica dioxide coating graphite has been manufactured with drying engineering by filtering.
Taken pictures using Walkthrough shape electron microscope by silica dioxide coating graphite surface is manufactured, result is write down on Fig. 2.
《Embodiment 5》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, the KS6) 10g and pyrene of 6 μm of size
The 1-pyrenecarboxylic acid 2g of derivative, to after stirring in 2 minutes, addition ammonia spirit is untill pH11.Afterwards, add
After 12g aluminum nitrate stirs to 12 hours, alumina coating graphite has been manufactured with drying engineering by filtering.
《Embodiment 6》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, the KS6) 10g and pyrene of 6 μm of size
The 1-pyrenecarboxylic acid 2g of derivative, to after stirring in 2 minutes, addition ammonia spirit is untill pH11.Afterwards, add
After 12g zinc nitrate stirs to 12 hours, Zinc oxide coating graphite has been manufactured with drying engineering by filtering
《Embodiment 7》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, the KS6) 10g and pyrene of 6 μm of size
The 1-pyrenecarboxylic acid 2g of derivative, to after stirring in 2 minutes, add 12g zirconium-n-propylates.Afterwards, 12g nitre is added
After sour zinc stirs to 12 hours, zirconia coating graphite has been manufactured with drying engineering by filtering.
《Embodiment 8》
The 100g ethanol addition aspect ratio 200 on normal temperature:1 and graphite (Tim is wiped, the KS6) 10g and pyrene of 6 μm of size
The 1-pyrenecarboxylic acid 2g of derivative, to after stirring in 2 minutes, addition ammonia spirit is untill pH11.Afterwards, add
After 12g magnesium nitrate stirs to 12 hours, magnesium oxide coating graphite has been manufactured with drying engineering by filtering.
《Embodiment 9》
The silica dioxide coating graphite 60 that will be manufactured as electric insulating quality and in the embodiment 3 of the filler of thermal conductivity coefficient
Weight % is kneaded manufacture using internal mixture with the weight % of high density polyethylene (HDPE) (HDPE) 40 as plastics on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics.
《Embodiment 10》
The weight of painting silica graphite 60 that will be manufactured as electric insulating quality and in the embodiment 4 of the filler of thermal conductivity coefficient
Amount % is manufactured with being kneaded as the weight % of high density polyethylene (HDPE) (HDPE) 40 of plastics using internal mixture on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics.
《Embodiment 11》
The weight of painting alumina graphite 60 that will be manufactured as electric insulating quality and in the embodiment 5 of the filler of thermal conductivity coefficient
Amount % is manufactured with being kneaded as the weight % of high density polyethylene (HDPE) (HDPE) 40 of plastics using internal mixture on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics.
《Embodiment 12》
The weight of painting zinc oxide graphite 60 that will be manufactured as electric insulating quality and in the embodiment 6 of the filler of thermal conductivity coefficient
Amount % is manufactured with being kneaded as the weight % of high density polyethylene (HDPE) (HDPE) 40 of plastics using internal mixture on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics.
《Embodiment 13》
Using as electric insulating quality and being coated to graphite for 60 weight % of the filler of thermal conductivity coefficient manufactures in embodiment 7
Painting zirconium oxide be kneaded with the weight % of high density polyethylene (HDPE) (HDPE) 40 as plastics using internal mixture on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics are manufactured.
《Embodiment 14》
Using the weight of painting magnesia graphite 60 manufactured in embodiment 8 of the filler of thermal conductivity coefficient as electric insulating quality
Amount % is manufactured with being kneaded as the weight % of high density polyethylene (HDPE) (HDPE) 40 of plastics using internal mixture on 260 DEG C
Electric insulating quality high thermal conductivity coefficient plastics.
《Comparative example 1》
Aspect ratio 200 is prepared:1 and the graphite (Timcal, KS6) of 6 μm of sizes
《Comparative example 2》
On normal temperature, aspect ratio 1000 is added on ethanol 100g:1 and 6 μm of size graphite (Cheap Tubes Inc.,
Graphite Nanoplatelets) 15g stir 2 minutes after, addition ammonia spirit untill ph11.Afterwards, TEOS18g is added
After stirring 12 hours, painting silica graphite has been manufactured with drying process by filtering.
The silica dioxide coating graphite surface to manufacture is inspected using Walkthrough shape electron microscope, result is write down on Fig. 3.
《Comparative example 3》
Using as the aspect ratio 200 of electric insulating quality thermal conductivity factor filler:1 and 6 μm of size graphite (Timcal, KS6)
60 weight % on 260 DEG C using internal mixture as plastics high density polyethylene (HDPE) (HDPE) 40 weight % with being kneaded manufacture
Electric insulating quality high thermal conductivity coefficient plastics.
《Comparative example 4》
Using the painting silica aspect ratio 1000 by comparative example 2 of the filler of thermal conductivity coefficient as electric insulating quality:1
And 6 μm of weight % of size graphite (Cheap Tubes Inc., Graphite Nanoplatelets) 60 are with being used as plastics highly dense
Degree polyethylene (HDPE) 40 weight % is kneaded using internal mixture on 260 DEG C has manufactured electric insulating quality high thermal conductivity coefficient
Property plastics.
《Comparative example 5》
First add aspect ratio 200:1 and 6 μm of size graphite (Timcal, KS6) 20g, add and stir sulfuric acid (98%) 20g
With being heated to 110 DEG C of 24 hours stones reformed by filtering and drying process, acquirement surface oxidation among nitric acid (63%) 60g
Ink.The graphite 15g of oxidation and reformation is added to 100g ethanol in normal temperature, addition ammonia spirit turns into ph11.Afterwards, normal temperature and nitrogen
Painting silica graphite has been manufactured with drying process by filtering after TEOS 12 hours of stirring that 18g is added on protective atmosphere.
It is above-mentioned as electric insulating quality and the weight % of painting silica graphite 60 of the filler of thermal conductivity coefficient manufacture gathers with high density
The weight % of ethene (HDPE) 40 has manufactured electric insulating quality high thermal conductivity coefficient plastics using 260 DEG C of mixings of internal mixture.
《Experimental example》Evaluation of physical property
The ceramic coating graphite manufactured by above-described embodiment and comparative example determines surface according to ASTM D 275
Resistance.Moreover the electric insulation being added according to the ceramic coating graphite packing manufactured by above-described embodiment and comparative example
Property and thermal conductivity coefficient plastics carry out ASTM E1461 and determine thermal conductivity factor (vertical direction：ΛHorizontal direction：Λ⊥).Upper
State the skin resistance of the ceramic coating graphite of multiple types on example and write down table 1 below together with combination, on table 1 embodiment general
Under the thermal conductivity factor and skin resistance measurement result of the polymer composite of ceramic coating graphite addition have been write down together with combination
Face table 2.
Table 1
Table 2
It is the weight % for ethanol in the quantity of graphite of above-mentioned table 1, the amount of fore-runner is for being closed using sol-gel process
Into when add graphite fore-runner weight %, pyrene derivatives amount is the pyrene derivatives weight % for graphite.
As described in above-mentioned table 1, if more all embodiments and comparative example 1, it is known that not attached on small aspect ratio graphite
Sample surfaces impedance value when adding the resurfacing procedures just to coat ceramics represents insulating properties.
If the skin resistance of comparing embodiment 3, embodiment 4 and comparative example 2, than wide aspect ratio graphite silica
Skin resistance determines high 270 times when the small aspect ratio graphite of coating matrix manufacture is manufactured with silica dioxide coating matrix.
This represents uniformly to coat just on the surface of graphite when embodiment 1 applies silica to the small aspect ratio graphite of embodiment 3
Show outstanding electric insulating quality.
On the other hand, obtained not relative to coating on surface to the wide aspect ratio graphite coated with silicon dioxide of comparative example 2
Uniformly it just can know that skin resistance than relatively low.Even if this is to be omitted to reform work with ceramic substrate on the small aspect ratio graphite of the present invention
Journey, also can uniformly coat ceramics just has outstanding electric insulating quality.
From the point of view of embodiment 4, skin resistance is not than using pyrene derivatives when hybrid ceramic fore-runner applies with pyrene derivatives
The skin resistance of embodiment 3 determines high 5000 times.Pyrene derivatives are due to that the pyrene group of phenyl ring 4 is adsorbed on graphite surface
Just graphite is supported scattered in solution.Because the end of pyrene derivatives is with the big effect base of electric negative degree just with titanium dioxide
The TEOS of silicon fore-runner has high-affinity, so mixing TEOS is verified when being applied with pyrenyl material uniformly coats dioxy on graphite surface
SiClx.
Fig. 4 claps a sample using Walkthrough shape electron microscope, and it is the stone with the embodiment of the present invention to scheme this sample
Hybrid ceramic and pyrene derivatives are coated on ink, using understanding that coated with silicon dioxide obtains uniformly on graphite surface during pyrene derivatives.
Look at embodiment 5 to embodiment 8, it is known that not only to carry out painting oxidation without reforming process on small aspect ratio graphite
Aluminium, zinc oxide, zirconium oxide and magnesia, also embodiment 1 equally possess outstanding electric insulating quality to embodiment 4.
Compare the embodiment 9 in above-mentioned table 2 to embodiment 14 and the HDPE complexs of the graphite of addition comparative example 3, add
The small aspect ratio of ceramic coating manufactured in embodiment 3, embodiment 4, embodiment 5, embodiment 6, embodiment 7 and embodiment 8
The HDPE complex surfaces resistance of graphite is all 1012Ω/more than sq just understands to possess electric insulating properties.
Embodiment 9 and comparative example 4 by contrast, it is known that the HDPE for adding painting silica sample on small aspect ratio graphite is answered
Polymer surface impedance value is significantly more outstanding than the HDPE complexs that silica sample is applied on addition wide aspect ratio graphite.This is
Because when applying ceramic on the small aspect ratio graphite implemented in the embodiment of table 1 on graphite surface not only it is uniform but also it is firm must coat, it is real
Applying high cut occurred in example 1 to the sample of embodiment 8 and HDPE internal mixture in 270 DEG C of mixing process also can be continuous
Split ceramic coating structure and maintain insulating properties.On the contrary, although comparative example 4 represents dispensing insulating properties HDPE, do not have on graphite surface
Uniformly coat, break ceramic structure, which is related to area between graphite and becomes big, among mixing process results in relative to having friendly relations electrically.This
Although being to omit graphite surface to reform engineering, doing Composite with macromolecule if applying ceramics on small aspect ratio graphite can also be carefully
The thermal conductivity factor and electric insulating quality of original physical property are maintained, turns out the outstanding property of the present invention.
Embodiment 9 and embodiment 10 by contrast, using pyrene derivatives with applying silica graphite in unified content
High 140 times or so of HDPE complex electric insulating qualities.Fig. 3 contents compared with Fig. 4 are the same, because utilizing pyrene derivatives
There is the autologous insulating properties of graphite that painting is more uniformly significantly increased with smooth surface in words ceramic coating.
Go out during the graphite surface reforming process manufacture method manufacture ceramic coating graphite added on comparative example 5 than embodiment 9
Now somewhat higher electric insulating quality.Because the surface treatment reacted by carbon materials surface oxidation typically carried out
Graphite crystallization is destroyed in process, causes to reduce conductive result and somewhat rises insulating properties.Moreover the destruction of this graphite crystallization causes
The problem of significantly reducing thermal conductivity factor.Therefore, graphite reforming process omits the engineering pure triggered and considers economic benefit
With produceability, present invention demonstrates that ceramic coating graphite manufacture method is substantially more outstanding than always technology.
The present invention is with reference to the embodiment explanation illustrated on drawing, but this is only illustrated, and has the art generally to know
The people of knowledge is appreciated that various denaturation and the possibility of impartial additional embodiment in the present invention.Therefore real skill of the inventionly
Art protection domain needs to determine according to technological thought on claims of annex.
Claims (9)
1. a kind of ceramic coating graphite manufacture method, including graphite（A）；With in the graphite（A）Side on it is chemically combined
Ceramics（B）, the ceramic coating graphite is by using colloidal sol-gel method with 108To 1016/ sq scope electric insulations
Property, it is characterised in that：
A：As graphite, by aspect ratio 10:1 to 200:The oval graphite of selection in the group of 1 composition,
B：More than a kind of the ceramics selected in the group being made up of magnesia, aluminum oxide, zinc oxide, zirconium oxide and silica,
When the graphite coats ceramics, pyrene derivatives or pyrene derivatives salt that following chemical formula 1 represents are added again as dispersant,
Chemical formula 1
In the chemical formula 1, R is from by carboxylic acid, C1 to C10 alkyl carboxylic acids, amine, C1 to C10 alkylamines, C1 to C10 alkyl carboxylics
Selected in the group that sour halogen, C1 to C10 alkyl carboxylic acids hydrazides and C1 to C10 alkyl carboxylic acids N-hydroxy-succinamide ester form
Select.
2. ceramic coating graphite manufacture method as claimed in claim 1, it is characterised in that：
Pyrene derivatives or the pyrene derivatives salt is more than a kind selected from by the group of following material composition, and the material is 1-
Pyrenyl butyl chloride, 1- pyrenyls daminozide, 1- pyrenes methylamine hydrochloride, 1- pyrene acid N- hydroxysuccinimidyls and from 1- pyrenes valeric acid, γ oxygen
The 1- pyrene carboxylic acids selected in generation -1- pyrenes butyric acid or 1- pyrene butyric acid.
3. a kind of ceramic coating graphite manufacture method, including：Contrast in the parts by weight of spirit solvent 100 and add in 0.1 to 70 parts by weight
Add average diameter 10mm：To 1000 μm of graphite（A）1 minute to 5 minutes fully dispersed stage（The a stages）；Described scattered
Solution on addition base catalyst do titration pH9 to 12 stage（B-stage）；
And the ceramic forerunner to be applied is added on the solution of the graphite dispersion, now, addition ceramic forerunner is based on described
After the parts by weight of graphite 100 10 to 300 parts by weight of contrast of throwing ceramics are coated to graphite surface（B）Stage (c stages), its feature
It is：
A：As graphite, by aspect ratio 10:1 to 200:The oval graphite of selection in the group of 1 composition,
B：More than a kind of the ceramics selected in the group being made up of magnesia, aluminum oxide, zinc oxide, zirconium oxide and silica,
The pyrene derivatives or pyrene derivatives salt for adding the following chemical formula 1 in the c stages again and representing are contrasted with the parts by weight of graphite 100
1 to 100 parts by weight,
Chemical formula 1
In the chemical formula 1, R is from by carboxylic acid, C1 to C10 alkyl carboxylic acids, amine, C1 to C10 alkylamines, C1 to C10 alkyl carboxylics
Selected in the group that sour halogen, C1 to C10 alkyl carboxylic acids hydrazides and C1 to C10 alkyl carboxylic acids N-hydroxy-succinamide ester form
Select.
4. ceramic coating graphite manufacture method as claimed in claim 3, it is characterised in that：
Pyrene derivatives or the pyrene derivatives salt is more than a kind selected from by the group of following material composition, and the material is 1-
Pyrenyl butyl chloride, 1- pyrenyls daminozide, 1- pyrenes methylamine hydrochloride, 1- pyrene acid N- hydroxysuccinimidyls and from 1- pyrenes valeric acid, γ oxygen
The 1- pyrene carboxylic acids selected in generation -1- pyrenes butyric acid or 1- pyrene butyric acid.
5. ceramic coating graphite manufacture method as claimed in claim 3, it is characterised in that：
The alcoholic solution be selected out of group that be made up of methanol, ethanol, propyl alcohol, butanol it is one kind or two or more.
6. ceramic coating graphite manufacture method as claimed in claim 3, it is characterised in that：
The base catalyst species is from by ammonium hydroxide, 4-propyl ammonium chloride, TPAOH, potassium hydroxide, four
Selection is one kind or two or more in the group of butylammonium bromide, tetrabutylammonium chloride and tetrabutylammonium hydroxide composition.
7. ceramic coating graphite manufacture method as claimed in claim 3, it is characterised in that：
The ceramic forerunner is from by magnesia presoma（ⓐ）, aluminum oxide presoma（ⓑ）, zinc oxide precursor（ⓒ）、
Zirconium oxide presoma（ⓓ）With two SiClx presomas（ⓔ）Selection is one kind or two or more in the group of composition,
ⓐ：Before the one kind or two or more magnesia selected in the group being made up of magnesium nitrate, magnesium acetate 4 hydrate and magnesium methoxide
Drive body；
ⓑ：The one kind or two or more oxidation selected in the group being made up of aluminum nitrate nonahydrate, aluminium isopropoxide and aluminium secondary butylate
Aluminium presoma；
ⓒ：More than a kind of zinc oxide precursor in zinc nitrate and zinc acetate；
ⓓ：By ZrO（NO3）2•H2O、Zr（NO3）2•xH2O and the one kind or two or more oxygen of selection in the group of zirconium-n-propylate composition
Change zirconium precursor body；
ⓔ：By propyl-triethoxysilicane, propyl trimethoxy silicane, 3- sulfydryls, 3- mercaptopropyis, tetraethyl orthosilicate, former silicon
Sour four methyl esters and one kind or two or more, the silica precursor of selection in the group of silicon tetrapropyl acetoacetic ester composition.
8. ceramic coating graphite manufacture method as claimed in claim 3, it is characterised in that：
The coating is reacted 6 to 24 hours in 15 to 80 DEG C of temperature.
A kind of 9. manufacture method of high thermal conductivity coefficient plastics, it is characterised in that：
By by the weight % of ceramic coating graphite 10 to 98 that manufacture method described in a certain item in claim 1 to 8 manufactures with
The weight of Markite 2 to 90 % is kneaded.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
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| KR10-2013-0091527 | 2013-08-01 | ||
| KR20130091527 | 2013-08-01 | ||
| KR1020140072934A KR101682899B1 (en) | 2013-08-01 | 2014-06-16 | Method of manufacturing ceramic coated graphite |
| KR10-2014-0072934 | 2014-06-16 | ||
| PCT/KR2014/005784 WO2015016490A1 (en) | 2013-08-01 | 2014-06-30 | Method for manufacturing ceramic-coated graphite |
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| CN105636903A CN105636903A (en) | 2016-06-01 |
| CN105636903B true CN105636903B (en) | 2017-11-17 |
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| JP5166689B2 (en) * | 2005-10-17 | 2013-03-21 | 昭和電工株式会社 | Method for producing silica-coated carbon fiber |
| KR101218508B1 (en) * | 2012-01-17 | 2013-01-03 | 인하대학교 산학협력단 | Ceramic-carbon composites and its process |
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| Title |
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| Effects of modification on performance of natural graphite coated by SiO2 for anode of lithium ion batteries;YANG Yong et al.;《Trans. Nonferrous Met. Soc. China》;20071231;第17卷;第1339-1342页 * |
| PVP-assistedsynthesisofdensesilica-coatedgraphitewithelectrically insulating property;Seongcheol Choi et al.;《Materials Letters》;20120916;第90卷;第87-89页 * |
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| Publication number | Publication date |
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| KR20150016471A (en) | 2015-02-12 |
| KR101682899B1 (en) | 2016-12-08 |
| CN105636903A (en) | 2016-06-01 |
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