CN109735095A - Graphene composite heat-conducting plastics and preparation method thereof - Google Patents
Graphene composite heat-conducting plastics and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of graphene composite heat-conducting plastics and preparation method thereof, wherein in parts by weight, the raw material of the graphene composite heat-conducting plastics includes: graphene: 2-10 parts；Heat filling: 10-40 parts；Coupling agent: 0.1-0.5 parts；Polyamide: 47-85 parts；Auxiliary agent: 0.5-3 parts.Graphene composite heat-conducting plastics provided by the invention and preparation method thereof can reduce the content of heat filling to reduce cost and guarantee the good mechanical property of graphene composite heat-conducting plastics and thermal conductivity.
Description
Technical field
The present invention relates to graphene composite material technical field, more particularly to a kind of graphene composite heat-conducting plastics and its
Preparation method.
Background technique
Just gradually substituted metal component is applied to the conducting-heat elements of LED lamp to heat-conducting plastic, compared with traditional metal material,
Heat-conducting plastic has the advantages such as light, easy to process.The basis material of heat-conducting plastic generally comprise PPS, PA6/PA66, LCP,
TPE, PC, PP, PPA, PEEK etc..Since the thermal conductivity of high molecular material is generally at 0.14-0.34W/ (mK), usually in high score
Heat filling is added in sub- material to improve thermal conductivity, but since the height of the heat filling thermal conductivity of filling makes product cost
At influence, in general, heat filling thermal conductivity is higher, and product cost will be multiplied.In addition, the loading of heat filling is big
Small also to will affect mechanical property, the loading of in general heat filling is bigger, and the impact strength of product is lower.
Heat-conducting plastic on the market has that insufficient heat conductivity is high or mechanical property does not reach requirement at present, although
The ratio increase of heat filling can raising thermal conductivity appropriate, but will necessarily sacrifice a part impact strength, accordingly, it is difficult to
Guarantee to meet heat-conducting plastic high thermal conductivity and good impact strength in the case where controlling cost.
Summary of the invention
Based on this, meet heat-conducting plastic high thermal conductivity and good punching in the case where controlling cost for being difficult to ensure
The technical issues of hit intensity, the present invention provide a kind of graphene composite heat-conducting plastics, in parts by weight, the graphene composite guide
The raw material of thermoplastic materials includes:
Graphene: 2-10 parts；
Heat filling: 10-40 parts；
Coupling agent: 0.1-0.5 parts；
Polyamide: 47-85 parts；
Auxiliary agent: 0.5-3 parts.
The heat filling is selected from aluminium oxide, boron nitride, aluminium nitride, silicon carbide, carbon nanometer in one of the embodiments,
At least one of pipe, graphite, silicon nitride.
The coupling agent is in silane coupling agent, aluminium titanium coupling agent, titanate coupling agent in one of the embodiments,
At least one.
The polyamide is selected from polycaprolactam, two acyl certain herbaceous plants with big flowers diamines of poly- certain herbaceous plants with big flowers, poly- certain herbaceous plants with big flowers two in one of the embodiments,
Acyl hexamethylene diamine, poly- hexamethylene dodecanamide, poly- 11 lactams, nylon 12, nylon 46, poly- terephthaldehyde
Acyl hexamethylene diamine, poly-paraphenylene terephthalamide's nonamethylene diamine, poly- paraphenylene terephthalamide's trimethylhexane diamine, at least one in polyhexamethylene adipamide
Kind.
The auxiliary agent is in OP wax, EBS, polyethylene wax, polypropylene wax, atoleine in one of the embodiments,
At least one.
The auxiliary agent includes component A and B component in one of the embodiments,
The component A is EBS,
The B component is selected from least one of OP wax, polyethylene wax, polypropylene wax, atoleine.
In one of the embodiments, in parts by weight, the raw material of the graphene composite heat-conducting plastics includes:
Graphene: 10 parts；
Silicon nitride: 40 parts；
Titanate esters: 0.5 part；
Polyhexamethylene adipamide resin: 47 parts；
EBS:1.5 parts；
OP wax: 1 part.
The graphene specific surface area is 150m in one of the embodiments,2/g-300m2/ g, the dilute average thickness of graphite
For 3nm-5nm.
The present invention also provides a kind of preparation methods for preparing graphene composite heat-conducting plastics, comprising the following steps:
Step 1: graphene, heat filling, coupling agent are mixed to get graphene composite guide thermit powder；
Step 2: graphene composite guide thermit powder being mixed to get graphene composite heat-conducting plastics with polyamide, auxiliary agent and is total to
Mixed object；
Step 3: graphene composite heat-conducting inorganic filler plastic blending material extruding pelletization obtains graphene composite heat-conducting plastics.
The step 2 specifically includes in one of the embodiments:
Graphene composite guide thermit powder and polyamide, auxiliary agent are added in high-speed mixer and mix simultaneously high-speed stirred,
Wherein, the high-speed mixer temperature control between 90 DEG C -100 DEG C, carry out high-speed stirred time be 10 minutes -15 points
Clock.
The present invention provides graphene composite heat-conducting plastics and preparation method thereof, wherein graphene composite heat-conducting plastics can
The content of heat filling is reduced to reduce cost and guarantee the good mechanical property of graphene composite heat-conducting plastics and thermal conductivity
Rate.
Specific embodiment
Below by embodiment, the present invention is further elaborated.
To realize the content that can reduce heat filling to reduce cost and guaranteeing that graphene composite heat-conducting plastics are good
Good mechanical property and thermal conductivity, the raw material of graphene composite heat-conducting plastics provided in an embodiment of the present invention include: graphene, lead
Hot filler, coupling agent, polyamide, auxiliary agent.
Graphene is a kind of Novel Carbon Nanomaterials of individual layer laminated structure being made of carbon atom, and thickness is only
0.335nm.Due to its with big specific surface area, good thermal stability and chemical stability, stronger hydrophobicity, be easy into
The advantages that row chemical modification, in high performance electronics, composite material, field emmision material, gas sensor and energy stores etc.
Field is widely applied.Graphene is by sp2Hydbridized carbon atoms close-packed arrays are formed, and have unique two-dimension periodic honeycomb
Lattice structure, the Stable Carbon hexatomic ring in the presence of structural unit assign its excellent hot property, it is considered to be outstanding heat
Lead material.
Further, the specific surface area of graphene is 150m2/g-300m2/ g, the dilute average thickness of graphite are 3nm-5nm.It is single
The thermal conductivity of layer graphene is up to 5200W/mK, is excellent Heat Conduction Material.Under normal circumstances, graphene specific surface area is bigger
Thermal conductivity is better, and thickness is thicker, and thermal conductivity is better.
Heat filling includes aluminium oxide, boron nitride, aluminium nitride, silicon carbide, carbon nanotube, graphite or silicon nitride.It is thermally conductive to fill out
The addition of material helps to reduce cost.When selecting heat filling, can selected from aluminium oxide, boron nitride, aluminium nitride, silicon carbide,
Any one or more in carbon nanotube, graphite or silicon nitride.
Further, the particle diameter of heat filling is 5nm-20nm, and the diameter of heat filling is bigger, the thermal conductivity of product
It can be better.
Coupling agent includes silane coupling agent, aluminium titanium coupling agent or titanate coupling agent.Coupling agent can improve inorganic matter and have
Interface interaction between machine object, to improve the performance of graphene and heat filling in body (polyamide).It is selecting
It, can the one or more selected from silane coupling agent, aluminium titanium coupling agent or titanate coupling agent when with coupling agent.
Since the basis material of heat-conducting plastic generally comprises PPS, PA6/PA66, LCP, TPE, PC, PP, PPA, PEEK etc.,
Wherein, PA6/PA66 has higher cost performance, the lattice material benefit of performance good price, and supply is stablized.
The basis material of the heat-conducting plastic provided in the present embodiment is polyamide, and polyamide includes polycaprolactam
Amine, two acyl certain herbaceous plants with big flowers diamines of poly- certain herbaceous plants with big flowers, two acyl hexamethylene diamine of poly- certain herbaceous plants with big flowers, poly- hexamethylene dodecanamide, poly- 11 lactams, nylon 12,
Nylon 46, poly- hexamethylene terephthalamide, poly-paraphenylene terephthalamide's nonamethylene diamine, poly- paraphenylene terephthalamide's trimethylhexane diamine
Or polyhexamethylene adipamide.Polyamide is the basis material of heat-conducting plastic, has good comprehensive performance.Selecting polyamides
When polyimide resin, it can choose the one or more of above-mentioned polyamide.
Specifically, the weight average molecular weight of polyamide is 5000~1000000.
Auxiliary agent includes OP wax, EBS, polyethylene wax, polypropylene wax or atoleine.When selecting auxiliary agent, may be selected wherein
It is one or more kinds of.
Wherein, OP wax, EBS, polyethylene wax, polypropylene wax, atoleine are lubricant, promote the flowing of mixed process
Property, improve processing efficiency；EBS is dispersing agent, reduces time and energy required for completing dispersion process.
Select the dispersing agent and lubricant in auxiliary agent simultaneously in one of the embodiments, meanwhile, improve dispersion efficiency
And mixed efficiency.Wherein, dispersing agent selects EBS, and lubricant selects OP wax, EBS, polyethylene wax, polypropylene wax, liquid stone
Any one in wax.
In embodiment provided by the invention, prepare the preparation method of graphene composite heat-conducting plastics the following steps are included:
Step 1: graphene, heat filling, coupling agent are mixed to get graphene composite guide thermit powder.
Specifically, graphene, heat filling, coupling agent are mixed and grinds to obtain graphene composite guide thermit powder, can passed through
Disperse 15min in high-power ultrasonic dispersion machine to realize.In dispersion process, graphene, heat filling and coupling agent are sufficiently connect
Touching effect, conducive to the effect for playing coupling agent.
Since the graphene film layer surface of structural integrity is inert, piece interlayer is easy to roll into a ball because of stronger Van der Waals force
Poly-, therefore, it is difficult to be dispersed in water and there are commonly solvents.In order to make full use of the excellent properties of graphene, improve it
Plastic processability, needs to carry out graphene that surface is modified, improves its dissolubility and dispersibility in the base.
The present embodiment carries out surface to graphene and is modified, under the action of high-power ultrasonic dispersion machine, graphene and coupling
Agent comes into full contact with, conducive to the effect of later period coupling agent connection polyamide and graphene in high-plastic mixing machine.Graphene with
Other cheap heat filling compoundings, wherein graphene and heat-conducting plastic (for example, polyamide) interaction make composite wood
The intermolecular of material has stronger interaction force, and assigns its preferable heating conduction.Therefore, it thermally conductive is filled out using fewer
The thermal conductivity of polyamide can be greatly improved in material.
Step 2: graphene composite guide thermit powder being mixed to get graphene composite heat-conducting plastics with polyamide, auxiliary agent and is total to
Mixed object.
Specifically, graphene composite guide thermit powder and polyamide, auxiliary agent, which are added in high-speed mixer, mixes simultaneously high speed
Stirring, wherein the temperature of the high-speed mixer controls between 90 DEG C -100 DEG C (being interpreted as temperature of charge), such as control exists
95 DEG C, the time for carrying out high-speed stirred is -15 minutes 10 minutes, such as 10 minutes.
Step 3: graphene composite heat-conducting inorganic filler plastic blending material extruding pelletization obtains graphene composite heat-conducting plastics.
Specifically, graphene composite heat-conducting inorganic filler plastic blending material is added in double screw extruder, and temperature setting is poly- according to difference
The difference of amide resin and adjust, such as: the relevant temperature of polycaprolactam is set as 230 DEG C, nylon 12 resin
Relevant temperature is set as 280 DEG C.
In one of the embodiments, in parts by weight, the raw material of graphene composite heat-conducting plastics includes:
Graphene: 2-10 parts；
Heat filling: 10-40 parts；
Coupling agent: 0.1-0.5 parts；
Polyamide: 47-85 parts；
Auxiliary agent: 0.5-3 parts.
Wherein, the specific value of the parts by weight of the raw material of graphene composite heat-conducting plastics can be adjusted as needed.
Preferably, in parts by weight, the auxiliary agent is 2.5-2.9 parts.
Each specific embodiment of the invention presented below.
Embodiment 1
(1) 2 parts of graphene, 10 parts of aluminium oxide, 0.1 part of silane coupling agent are mixed, wherein graphene specific surface area is
150m2/ g with a thickness of 4nm, and disperses 15min in high-power ultrasonic dispersion machine and obtains graphene composite guide thermit powder.
(2) in graphene composite guide thermit powder plus 85 parts of polycaprolactams, 2 parts of atoleines, 0.9 part of EBS and
High-speed mixer high speed is stirred to 95 DEG C, and control continues stirring 10 minutes at such a temperature, and high-speed stirred is mixed to get graphite
Alkene composite heat-conducting inorganic filler plastic blending material.
(3) double screw extruder is added in mixed graphene composite heat-conducting inorganic filler plastic blending material, temperature setting is 230
DEG C, extruding pelletization obtains graphene composite heat-conducting plastics.
(4) master batch of graphene composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the roundlet of 2mm
Piece.It tests, measures in laser heat conducting instrument according to GBT 8722-2008 " graphite material medium temperature Measured Results of Thermal Conductivity method " standard
Thermal conductivity.
Embodiment 2
(1) 4 parts of graphenes, 20 parts of boron nitride, 0.2 part of aluminium titanium coupling agent are mixed, wherein graphene specific surface area is
200m2/ g with a thickness of 3nm, and disperses 15min in high-power ultrasonic dispersion machine and obtains graphene composite guide thermit powder.
(2) add 73 parts of nylon 12 resins, 1 part of polyethylene wax, 1.8 parts of EBS simultaneously in graphene composite guide thermit powder
High-speed stirred is to 95 DEG C in a high speed mixer, and control continues stirring 10 minutes at such a temperature, and high-speed stirred is mixed to get stone
Black alkene composite heat-conducting inorganic filler plastic blending material.
(3) double screw extruder is added in mixed graphene composite heat-conducting inorganic filler plastic blending material, temperature setting is 280
DEG C, extruding pelletization obtains graphene composite heat-conducting plastics.
(4) master batch of graphene composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the roundlet of 2mm
Piece.It tests, measures in laser heat conducting instrument according to GBT 8722-2008 " graphite material medium temperature Measured Results of Thermal Conductivity method " standard
Thermal conductivity.
Embodiment 3
(1) 6 parts of graphenes, 30 parts of aluminium nitride, 0.3 part of silane coupling agent are mixed, wherein graphene specific surface area is
250m2/ g with a thickness of 5nm, and disperses 15min in high-power ultrasonic dispersion machine and obtains graphene composite guide thermit powder.
(2) add 61 parts of nylon 46 resins, 1.5 parts of polypropylene waxes, 1.2 parts in graphene composite guide thermit powder
EBS and in a high speed mixer high-speed stirred are to 95 DEG C, and control continues stirring 10 minutes at such a temperature, and high-speed stirred mixes
To graphene composite heat-conducting inorganic filler plastic blending material.
(3) double screw extruder is added in mixed graphene composite heat-conducting inorganic filler plastic blending material, temperature setting is 295
DEG C, extruding pelletization obtains graphene composite heat-conducting plastics.
(4) master batch of graphene composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the roundlet of 2mm
Piece.It tests, measures in laser heat conducting instrument according to GBT 8722-2008 " graphite material medium temperature Measured Results of Thermal Conductivity method " standard
Thermal conductivity.
Embodiment 4
(1) 10 parts of graphenes, 40 parts of silicon nitrides, 0.5 part of titanate coupling agent are mixed, wherein graphene specific surface area is
300m2/ g disperses 15min with a thickness of 5nm and in high-power ultrasonic dispersion machine and obtains graphene composite guide thermit powder.
(2) in thermal conducting agent plus 47 parts of polyhexamethylene adipamide resins, 1 part of OP wax, 1.5 parts of EBS and in high-speed mixer
High speed is stirred to 95 DEG C, and control continues stirring 10 minutes at such a temperature, and high-speed stirred is mixed to get graphene composite heat-conducting
Inorganic filler plastic blending material.
(3) double screw extruder is added in mixed graphene composite heat-conducting inorganic filler plastic blending material, temperature setting is 250
DEG C, extruding pelletization obtains graphene composite heat-conducting plastics.
(4) master batch of graphene composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the roundlet of 2mm
Piece.It tests, measures in laser heat conducting instrument according to GBT 8722-2008 " graphite material medium temperature Measured Results of Thermal Conductivity method " standard
Thermal conductivity.
Comparative example 1
(1) 10 parts of aluminium oxide, 0.1 part of silane coupling agent are mixed, and disperses 15min in high-power ultrasonic dispersion machine and obtains
To composite guide thermit powder.
(2) add 87 parts of polycaprolactams, 2 parts of atoleines, 0.6 part of EBS in composite guide thermit powder and mixed in high speed
Conjunction machine high speed is stirred to 95 DEG C, and control continues stirring 10 minutes at such a temperature, and high-speed stirred is mixed to get composite guide thermoplastic
Expect blend.
(3) double screw extruder is added in mixed composite heat-conducting inorganic filler plastic blending material, temperature setting is squeezed out at 230 DEG C
It is granulated, obtains composite heat-conducting plastics.
(4) master batch of composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the sequin of 2mm.According to
GBT 8722-2008 standard is tested in laser heat conducting instrument, measures thermal conductivity.
Comparative example 2
(1) 20 parts of boron nitride, 0.2 part of aluminium titanium coupling agent are mixed, and disperses 15min in high-power ultrasonic dispersion machine and obtains
To composite guide thermit powder.
(2) add 77 parts of nylon 12 resins, 1 part of polyethylene wax, 1 part of EBS in composite guide thermit powder and mixed in high speed
Conjunction machine high speed is stirred to 95 DEG C, and control continues stirring 10 minutes at such a temperature, and high-speed stirred is mixed to get composite guide thermoplastic
Expect blend.
(3) double screw extruder is added in mixed composite heat-conducting inorganic filler plastic blending material, temperature setting is squeezed out at 280 DEG C
It is granulated, obtains composite heat-conducting plastics.
(4) master batch of composite heat-conducting plastics is finally molded into 12.7 millimeters of diameter, with a thickness of the sequin of 2mm.According to
GBT 8722-2008 standard is tested in laser heat conducting instrument, measures thermal conductivity.
As shown in table 1 below, the present invention provide the heat-conducting plastic of each embodiment and each comparative example raw material it is specific accordingly
Match numerical value.
Table 1: the proportion table of each embodiment and comparative example provided by the invention
The heat-conducting plastic of each embodiment and comparative example is tested for the property according to the present invention, and specific performance is as shown in table 2.
Table 2: the performance test table of each embodiment and comparative example
According to the performance test results of embodiment 1-4, have to draw a conclusion:
Preparation method provided in an embodiment of the present invention has different thermally conductive for manufactured graphene composite heat-conducting plastics
Performance is able to satisfy the demand of different clients, and cost and performance all has some superiority.Graphene and heat filling are in polyamide
Heat conduction network is formed in resin, and there is graphene itself 5200W/mK thermal conductivity to be higher than other heat fillings, graphene tool
The main reason for high thermal conductivity is that the covalent bond between its carbon carbon is strong, and carbon atom quality is small.
Graphene composite heat-conducting plastics not only have good thermal conductivity as Heat Conduction Material, have certain mechanical property,
And performance is produced better than general heat-conducting plastic in the market applied to the lampshade of LED, lamp holder, Lamp cup and other heat radiation of electrical apparatus shells
Product have good commercial value.
Graphene composite heat-conducting plastic applications have had the advantage that in the conducting-heat elements of LED lamp:
First, graphene composite heat-conducting plastic heat radiation is uniform, scorching hot point is avoided, reduces conducting-heat elements because of office caused by high temperature
Portion's deformation；
Second, conducting-heat elements made of graphene composite heat-conducting plastics are light, it is 40%-50% lighter than aluminium；
Third, graphene composite heat-conducting plastics processing is convenient, it is not necessarily to secondary operation；
Fourth, product is made with graphene composite heat-conducting plastics, product design freedom degree is high.
Graphene composite heat-conducting plastics provided by the invention reduce the usage amount of heat filling to reduce cost and protect
Hold good mechanical property and thermal conductivity.Metal is substituted using graphene composite heat-conducting plastics, light fitting shape design can be increased
Flexibility, reduce lamps and lanterns total weight.In addition to this, graphene composite heat-conducting plastic applications can be mentioned effectively in field of light fittings
High illumination efficiency saves power consumption.
Graphene composite heat-conducting plastics provided by the invention are by graphene, polyamide, heat filling and auxiliary agent through dividing
It dissipates, be blended, extrusion molding is made.Preparation method provided by the invention is dispersed in polyamide substrate with making graphene uniform, benefit
The good power of composite material is maintained while obtaining high-termal conductivity with the excellent heating conduction of graphene and mechanical property
Performance is learned, and preparation process is simple and effective, can be applied in the market as a kind of novel heat-conducting plastics.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of graphene composite heat-conducting plastics, it is characterised in that: in parts by weight, the original of the graphene composite heat-conducting plastics
Material includes:
Graphene: 2-10 parts；
Heat filling: 10-40 parts；
Coupling agent: 0.1-0.5 parts；
Polyamide: 47-85 parts；
Auxiliary agent: 0.5-3 parts.
2. graphene composite heat-conducting plastics as described in claim 1, it is characterised in that: the heat filling be selected from aluminium oxide,
At least one of boron nitride, aluminium nitride, silicon carbide, carbon nanotube, graphite, silicon nitride.
3. graphene composite heat-conducting plastics as claimed in claim 2, it is characterised in that: the coupling agent is selected from silane coupled
At least one of agent, aluminium titanium coupling agent, titanate coupling agent.
4. graphene composite heat-conducting plastics as claimed in claim 3, it is characterised in that: the polyamide, which is selected from, to be gathered in oneself
Amide, two acyl certain herbaceous plants with big flowers diamines of poly- certain herbaceous plants with big flowers, two acyl hexamethylene diamine of poly- certain herbaceous plants with big flowers, poly- hexamethylene dodecanamide, poly- 11 lactams, acyl in poly- 12
Amine, nylon 46, poly- hexamethylene terephthalamide, poly-paraphenylene terephthalamide's nonamethylene diamine, poly- paraphenylene terephthalamide's trimethyl oneself
At least one of diamines, polyhexamethylene adipamide.
5. graphene composite heat-conducting plastics as claimed in claim 4, it is characterised in that: the auxiliary agent is selected from OP wax, EBS, gathers
At least one of ethylene waxes, polypropylene wax, atoleine.
6. graphene composite heat-conducting plastics as claimed in claim 4, it is characterised in that: the auxiliary agent includes component A and B group
Part,
The component A is EBS,
The B component is selected from least one of OP wax, polyethylene wax, polypropylene wax, atoleine.
7. graphene composite heat-conducting plastics as claimed in claim 6, it is characterised in that: in parts by weight, the graphene is multiple
Close heat-conducting plastic raw material include:
Graphene: 10 parts；
Silicon nitride: 40 parts；
Titanate esters: 0.5 part；
Polyhexamethylene adipamide resin: 47 parts；
EBS:1.5 parts；
OP wax: 1 part.
8. graphene composite heat-conducting plastics as described in claim 1, it is characterised in that: the graphene specific surface area is
150m2/g-300m2/ g, the dilute average thickness of graphite are 3nm-5nm.
9. a kind of preparation method for preparing graphene composite heat-conducting plastics, it is characterised in that: the following steps are included:
Step 1: graphene, heat filling, coupling agent are mixed to get graphene composite guide thermit powder；
Step 2: graphene composite guide thermit powder and polyamide, auxiliary agent are mixed to get graphene composite heat-conducting plastic blend
Object；
Step 3: graphene composite heat-conducting inorganic filler plastic blending material extruding pelletization obtains graphene composite heat-conducting plastics.
10. preparing the preparation method of graphene composite heat-conducting plastics as claimed in claim 9, it is characterised in that: the step 2
It specifically includes:
Graphene composite guide thermit powder and polyamide, auxiliary agent are added in high-speed mixer and mix simultaneously high-speed stirred, wherein
The temperature of the high-speed mixer controls between 90 DEG C -100 DEG C, and the time for carrying out high-speed stirred is -15 minutes 10 minutes.
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| CN110483995A (en) * | 2019-09-05 | 2019-11-22 | 安徽省聚科石墨烯科技股份公司 | A kind of graphene heat-conducting plastic and preparation method thereof |
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