CN108314857A - A kind of preparation method of the wear-resistant conductive composite material containing graphene - Google Patents
A kind of preparation method of the wear-resistant conductive composite material containing graphene Download PDFInfo
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- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
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- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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Abstract
The present invention provides a kind of preparation methods of the wear-resistant conductive composite material containing graphene, this method obtains the graphene mixture filler of non-covalent bond modification by pretreatment, it adds in the mixture of plastic pellet, by the process for heating, stirring, obtains pretreated plastic pellet.Again by drying, twin-screw is repeatedly granulated the plastic pellet for the wear-resistant conductive for obtaining uniformly mixed graphene-containing.The plastic pellet of party's legal system has preparation process simple, pollution is few, the mixture homogeneity of graphene is good, and the advantages that improve to the mechanical property of plastics, has good application value in terms of the electromagnetic shielding and antistatic on the plastic material of various electric appliances and electronics.
Description
Technical field
The present invention relates to the preparations of wear-resistant conductive composite material, specially the wear-resistant conductive type general-purpose plastics containing graphene
The preparation method of composite material.
Background technology
Current conducing composite material majority refers to conductive polymeric composite, produces the side of conducting polymer composite
Fado is carried out with conductive filler dispersion method, wherein traditional conductive filler includes：Carbon black, carbon fiber, graphene fiber, metal powder
The materials such as end and its fiber or fragment, the glass fibre for plating metal.For polymer, carbon black needs a large amount of be added just can be with
Realize electric conductivity, but the performance that will certainly lead to product of mass filler declines, and generates unfavorable factor；And most metals material
The corrosion resistance of material is poor, can also influence the performance of material；Although the addition of fiber-like material is preferable in all fields,
The surface of its product may have the substance of threadiness, influence material appearance.And graphene and the material of carbon nanotube have resistance to height
Warm, light-weight, the features such as conductivity is high, property is stable, chemical stability is strong.Graphene is by carbon atom as new material
There are one the two-dimensional materials of atomic layer level thickness for the only tool formed with SP2 hybridized orbits, and resistivity is 10-6 Ω cm, than routine
In the case of metallic silver it is also low, therefore its excellent electric conductivity, while graphene has good flexibility and rigidity, for compound
The mechanical property of material is improved to have and be improved well, while also having good thermal conductivity.And carbon nanotube can regard stone as
Black alkene lamella crimps, therefore has similar performance.It is maximum that the two difference is that the sheet of graphene can create
Effective surface area has composite material certain age inhibiting effect, and carbon nanotube is with certain length with very big
Rigidity, be also referred to as " super fiber ", therefore the two combination can form preferable conductive network, while can also improve it
Physical and mechanical property.And the combination of both of the above is less in the research in plastic composite field and report, main reason is that
No matter on the one hand being used both as filler when being used alone or being used in combination, dosage is larger, on the other hand essentially consists in two
It is easy to happen agglomeration in the recombination process of person and plastic material and leads to disperse problem of non-uniform, i.e., dispersed poor, pole
The big final performance for influencing composite material, causes the applicability of material to be deteriorated.
And for the selection of plastic material, plastic material general at present, price is relatively low, is widely used on the market, packet
It includes, packaging, automobile, instrument, electronics, electric appliance, computer, medical field etc..But there is also some performances for such material itself
Gap, as relatively low in terms of mechanical property, later stage ageing-resistant speed is fast etc..Therefore, how the above filler to be answered well
For plastic composite field, improves the electric conductivity of composite material while reducing the additive amount of filler as far as possible, and as far as possible
The performance deficiency for making up plastics itself is current those skilled in the art's urgent problem.
Invention content
It is an object of the invention to be provided a kind of containing the wear-resisting of graphene to overcome the above the deficiencies in the prior art
The preparation method of conducing composite material, additive amount is big in plastic composite when solving graphene and carbon nanotube as filler
And the problem of bad dispersibility, while improving the physical and chemical performances such as conductivity of composite material energy and wearability.
The invention is realized by the following technical scheme：
A kind of preparation method of the wear-resistant conductive composite material containing graphene, includes the following steps：
(1) graphene and carbon nanotube is surface-functionalized：The nothing containing coupling agent is added in graphene and carbon nanotube
The in the mixed solvent of water-ethanol and dimethylbenzene stirs evenly, then progress ultrasonic vibration 4-20 is small within the temperature range of 20-50 DEG C
When, dispersant is then added, is stirred, obtains pretreatment material；
(2) plastic pellet, nylon, toughener, bulking agent and brightener are uniformly mixed, add what step (1) obtained
Pretreatment material, is stirred 15-30 minutes, and whipping temp is 40-60 DEG C, is formed and premixes uniform mixture；
(3) mixture of gained is dried, then is granulated, the wear-resistant conductive plastic for obtaining uniformly mixed graphene is multiple
Condensation material.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, each component in step (1)
The weight percent of addition is as follows：It is graphene 1-5%, carbon nanotube 5-15%, coupling agent 1-5%, dispersant 1-5%, anhydrous
Ethyl alcohol 60-80%, dimethylbenzene 5-10%, the sum of percentage that the above components are added are 100%.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, ultrasound shake in step (1)
It is 40-60KHz, power 300W, 20-50 DEG C of ultrasonic temperature to swing frequency.Wherein ultrasonic vibration is to forming preferable dispersion effect
It can be obtained final pretreatment material.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, each component in step (2)
Weight percent it is as follows：Plastic pellet 55-70%, nylon 5-15%, toughener 2-10%, bulking agent 1-5%, pretreatment material
10-20%, brightener 0.5-3%, the sum of percentage of the above components are 100%.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, coupling agent in step (1)
For silane coupling agent, dispersant is dispersant WS7010, and brightener is brightener A388 in step (2).
Further, the preparation method of the wear-resistant conductive composite material containing graphene, graphene in step (1)
For thin layer or multilayer material, thickness 1-10nm, 1-5 μm of piece diameter, carbon nanotube are multi wall carbon pipe, a diameter of to be more than 50nm, length
Degree is 10-30um.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, step are moulded described in (2)
Material particle is the plastic pellet that general-purpose plastics is prepared；The nylon is the nylon that fusing point is 160-210 DEG C.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, toughener in step (2)
For DOP environmental protection class toughener；Bulking agent is styrene-maleic anhydride copolymer class bulking agent.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, the middle drying of step (3)
Temperature is 80 DEG C, drying time 4-6 hours.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, middle be granulated of step (3) are adopted
It is granulated with double screw extruder, the temperature of granulation is 180 DEG C -210 DEG C, and rotating speed is 50-100 rpms.
Further, the preparation method of the wear-resistant conductive composite material containing graphene, the general-purpose plastics are
Any one in polystyrene plastics, ABS plastic, vinyon or polypropylene plastics.
Graphene and carbon nanotube are added in the absolute ethyl alcohol and xylene solvent of scattered auxiliary agent and stir by the present invention
Mix uniformly, then carry out ultrasonic vibration after 4-20 hours within the temperature range of 20-50 DEG C, formed non-covalent modification graphene and
Carbon nanotube；Final composite material can be made to reach good conductive effect using less amount of conductive material, simultaneously for adding
The case where entering the wearability occurred after filler and other mechanical properties decreases has obtained preferable solution.
In preparation method provided by the invention, using graphene and carbon nanotube as basic conductive material, while profit
With complementation of the two in microstructure so that final material is obviously improved in terms of electric conductivity and mechanical property,
The combination of the two is significantly increased for the electric conductivity of material, while changing material surface to a certain extent using coupling agent
Characteristic contributes to the peptizaiton between component, and the characteristic of wetting and dispersing conductive material is played using dispersant, is further improved
The dispersibility of graphene and carbon nanotube, using absolute ethyl alcohol and dimethylbenzene as mixed solvent dispersing conductive material, wherein two
The introducing of toluene improves the dispersion effect of dispersant, and it is volatile that absolute ethyl alcohol is pollution-free, is mixed during final be granulated
Solvent volatilizees, obtain compatibility and the excellent composite material of dispersibility, the significant increase conductive homogeneity of composite material.
Composite material of the present invention is basic material with plastic pellet, cheap, is widely used, utilizes nylon material wearability
Good feature carries out the composite modified of composite material；Toughener has the effect of increasing toughness；Bulking agent can improve plastic pellet
The compatibility of son and nylon, while improving plastic fraction and the compatibility of graphene and carbon nanotube in pretreatment material；Brightener
A388 has the effect of the bright material of lubrication itself, while also can a degree of improvement dispersion effect during granulation.
In preparation method provided by the invention, using absolute ethyl alcohol and dimethylbenzene as the dispersion of graphene and carbon nanotube
Carrier solvent enhances graphite using the synergistic effect between coupling agent and dispersant and graphene, carbon nanotube and dimethylbenzene
The dispersion homogeneity of alkene and carbon nanotube, then by the compatibility of solubilizer and toughener raising plastic pellet and nylon, simultaneously
The compatibility and dispersibility between plastic pellet and nylon and graphene and carbon nanotube are promoted, and then obtains disperseing uniform mix
Close object；In final drying and granulation process, mixed solvent volatilization obtains the uniform composite material of electric conductivity.
The present invention is compounded using the space structure of graphene and carbon nanotube complementation, while improving electric conductivity
Greatly improve the mechanical property of materials so that good electric conductivity, while profit can be played in the case of additive amount very little
Theory is blended with multiple elements design, cooperates with mixed solvent that graphene and carbon nanotube are well divided by coupling agent and dispersant
It dissipates, then conductive material is wrapped up with organic matter and reaches good compatibility and dispersibility between component using suitable bulking agent,
Finally by suitable technological process, the plastic composite of the good wear-resistant conductive of electric conductivity is prepared.
Advantageous effect：
1, compared with prior art, the present invention is using graphene and the highly conductive performance of carbon nanotube, by rational
Compounding and pretreated mode reduce the additive amount of conductive filler, and asking for grapheme material bad dispersibility of effective solution
Topic also effectively raises the physical and mechanical property of material simultaneously.
2, effective compounding of graphene and carbon nanotube greatly improves the problem of sheet resistance differs greatly, while
The rigidity of carbon nano-tube material is utilized, effectively raises the tensile property of material.
3, rational material is selected, effectively avoids the defect of homogenous material, certain amplitude improves the resistance to of material
Compatibility between mill property and material.
4, obtained graphene wear-resistant conductive composite material can not only reach preferable wear-resisting and conductive effect, together
When also improve a lot for the heat conduction of material and ageing-resistant effect.
5, in terms of the properties of gained wear-resistant conductive composite material：Tensile strength highest can promote 20%, impact strength
15%, sheet resistance is preferably 103Ω is conducting grades, relative wear resistance 1.31.
Specific implementation mode
(1) with reference to specific embodiment, the present invention is described in further detail：
A, graphene and the pretreatment material of carbon nanotube：
B, comprehensive batch mixing
The dispersant used in the embodiment of the present invention is the dispersant of dimension Persian new material Co., Ltd
WinSperse7010, brightener use the brightener A388 of the complete works of Science and Technology Ltd. of Shenzhen gold.
(2) specific preparation method includes the following steps：
Step 1, absolute ethyl alcohol and dimethylbenzene is added in graphene, carbon nanotube and silane coupling agent according to aforementioned proportion
In solvent, start to stir evenly under room temperature.
Step 2, the liquid material stirred evenly is put into ultrasonic device and carries out ultrasound, set temperature is in 20-50 DEG C of model
Enclose interior progress ultrasonic vibration 4-20 hours, ultrasonic vibration frequency is 40-60KHz, adds wetting dispersing agent, continues at normal temperatures
Stir half an hour.
Step 3, the component in addition to pre-processing and expecting is uniformly mixed further according to aforementioned proportion, and pretreatment material is added
Wherein, start stirring 15-30 minutes, and set 50 DEG C of temperature, and form the uniform mixture of premix.
Step 4, the mixture of gained is placed 4-6 hours in 80 DEG C of baking oven again, enters back into twin-screw granulation, is granulated
1-3 wear-resistant conductive plastic composite material for obtaining uniformly mixed graphene of number, and standard batten is made in material and is carried out
Performance test.Wherein the set temperature of twin-screw is 180-210 DEG C, and rotating speed is set as 50-100r/min.
Graphene used by above is thin layer or multilayer material, preferred thickness 1-10nm, 1-5 μm of piece diameter, carbon nanometer
Pipe is multi wall carbon pipe, preferably a diameter of to be more than 50nm, length 10-30um.
Embodiment 1
(1) silane coupling agent of 3kg is added in a reservoir, and the dimethylbenzene of 8kg and the absolute ethyl alcohol of 75kg is added, opens and stirs
It mixes.
(2) it is slowly added to the graphene of 2kg and the carbon nanotube of 9kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 16h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 3kg is added, and stir 1h, obtains pretreatment material.
(5) while DOP toughener, the 1.5kg of the polystyrene plastics particle of 70kg, the low melting point nylon of 6kg, 4kg being taken
Bulking agent and the brightener A388 of 1.5kg be uniformly mixed in larger container.
(6) 17kg pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 5 hours in 80 DEG C of baking oven, twin-screw machine is added in the material of drying
In, shear granulation, temperature sets 200 DEG C, setting speed 100r/min.Suitable plastic pellet is finally obtained, and utilizes injection molding
It is to be measured that standard batten is made in machine.
The performance test results of gained composite material：Tensile strength：33.20MPa, impact strength：20.09MPa, surface electricity
Resistance：103Ω, relative wear resistance：1.12.
Embodiment 2
(1) silane coupling agent of 5kg is added in a reservoir, and the dimethylbenzene of 10kg and the absolute ethyl alcohol of 60kg is added, opens
Stirring.
(2) it is slowly added to the graphene of 3kg and the carbon nanotube of 17kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 20h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 5kg is added, and stir 1h, obtains pretreatment material.
(5) while DOP toughener, the 1.5kg of the polystyrene plastics particle of 68kg, the low melting point nylon of 8kg, 6kg being taken
Styrene-maleic anhydride copolymer bulking agent and the brightener A388 raw materials of 1.5kg be uniformly mixed in larger container.
(6) it takes 15kg pretreatment material to pour into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 6 hours in 80 DEG C of baking oven, twin-screw finally is added in the material of drying
In machine, shear granulation, temperature sets 190 DEG C, setting speed 50r/min.Suitable plastic pellet is finally obtained, and utilizes note
It is to be measured that standard batten is made in molding machine.
The performance test results of gained composite material：Tensile strength：34.08MPa, impact strength：22.46MPa, surface electricity
Resistance：104Ω, relative wear resistance：1.21.
Embodiment 3
(1) silane coupling agent of 3kg is added in a reservoir, and the dimethylbenzene of 10kg and the absolute ethyl alcohol of 73kg is added, opens
Stirring.
(2) it is slowly added to the graphene of 3kg and the carbon nanotube of 8kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 12h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 3kg is added, and stir 1h, obtains pretreatment material.
(5) at the same take the polypropylene plastics particle of 67.5kg, the low melting point nylon of 10kg, 2.5kg DOP toughener,
The styrene-maleic anhydride copolymer bulking agent of 1.5kg and the brightener A388 raw materials of 1.5kg are stirred in larger container
Uniformly.
(6) 17kg pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 6 hours in 80 DEG C of baking oven, twin-screw finally is added in the material of drying
In machine, shear granulation, temperature sets 200 DEG C, setting speed 100r/min.Suitable plastic pellet is finally obtained, and is utilized
It is to be measured that standard batten is made in injection molding machine.
The performance test results of gained composite material：Tensile strength：27.41MPa, impact strength：27.95MPa, surface electricity
Resistance：103Ω, relative wear resistance：1.08.
Embodiment 4
(1) silane coupling agent of 2.5kg is added in a reservoir, and the dimethylbenzene of 8kg and the absolute ethyl alcohol of 78kg is added, opens
Stirring.
(2) it is slowly added to the graphene of 3kg and the carbon nanotube of 6.5kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 16h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 2kg is added, and stir 1h, obtains pretreatment material.
(5) while the polypropylene plastics particle of 65.5kg, the low melting point nylon of 12kg, the DOP toughener of 5kg, 2kg being taken
The brightener A388 raw materials of styrene-maleic anhydride copolymer class bulking agent and 1.5kg are uniformly mixed in larger container.
(6) 14kg pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 4 hours in 80 DEG C of baking oven, twin-screw finally is added in the material of drying
In machine, shear granulation, temperature sets 190 DEG C, setting speed 100r/min.Suitable plastic pellet is finally obtained, and is utilized
It is to be measured that standard batten is made in injection molding machine.
The performance test results of gained composite material：Tensile strength：28.66MPa, impact strength：29.48MPa, surface electricity
Resistance：104Ω, relative wear resistance：1.24.
Embodiment 5
(1) silane coupling agent of 3kg is added in a reservoir, and the dimethylbenzene of 10kg and the absolute ethyl alcohol of 74.5kg is added,
Open stirring.
(2) it is slowly added to the graphene of 3.5kg and the carbon nanotube of 7kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 12h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 2kg is added, and stir 1h, obtains pretreatment material.
(5) while the benzene second of the ABS plastic particle of 66kg, the low melting point nylon of 12kg, the DOP toughener of 3kg, 2kg is taken
The brightener A388 raw materials of alkene-copolymer-maleic anhydride bulking agent and 1.5kg are uniformly mixed in larger container.
(6) 15.5kg pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 6 hours in 80 DEG C of baking oven, twin-screw machine is added in the material of drying
In, shear granulation, temperature sets 190 DEG C, setting speed 80r/min.Suitable plastic pellet is finally obtained, and utilizes injection molding machine
It is to be measured that standard batten is made.
The performance test results of gained composite material：Tensile strength：45.62MPa, impact strength：32.82MPa, surface electricity
Resistance：103-4Ω, relative wear resistance：1.27.
Embodiment 6
(1) silane coupling agent of 2.5kg is added in a reservoir, and the dimethylbenzene of 10kg and the anhydrous second of 76.5kg is added
Alcohol opens stirring.
(2) it is slowly added to the graphene of 4kg and the carbon nanotube of 5kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 20h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 2kg is added, and stir 1h, obtains pretreatment material.
(5) while the benzene second of the ABS plastic particle of 63kg, the low melting point nylon of 15kg, the DOP toughener of 4kg, 3kg is taken
The brightener A388 raw materials of alkene-copolymer-maleic anhydride bulking agent and 1.5kg are uniformly mixed in larger container.
(6) 13.5 pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 4 hours in 80 DEG C of baking oven, twin-screw finally is added in the material of drying
In machine, shear granulation, temperature sets 210 DEG C, setting speed 80r/min.Suitable plastic pellet is finally obtained, and utilizes note
It is to be measured that standard batten is made in molding machine.
The performance test results of gained composite material：Tensile strength：46.67MPa, impact strength：34.61MPa, surface electricity
Resistance：104Ω, relative wear resistance：1.31.
Embodiment 7
(1) silane coupling agent of 1kg is added in a reservoir, and the dimethylbenzene of 5kg and the absolute ethyl alcohol of 80kg is added, opens and stirs
It mixes.
(2) it is slowly added to the graphene of 5kg and the carbon nanotube of 7kg, and is constantly stirred, until uniform.
(3) container is being placed in progress ultrasound in ultrasonator, time 16h, 25 DEG C of set temperature, maximum temperature cannot
More than 50 DEG C.
(4) after ultrasound, the dispersant of 2kg is added, and stir 1h, obtains pretreatment material.
(5) while the polypropylene plastics particle of 68.5kg, the low melting point nylon of 5kg, the DOP toughener of 10kg, 1kg being taken
The brightener A388 raw materials of styrene-maleic anhydride copolymer class bulking agent and 0.5kg are uniformly mixed in larger container.
(6) 15kg pretreatment material are poured into the mixed material of uniformly mixed plastic pellet, starts mixing time
30min, and 50 DEG C of set temperature are uniformly mixed.
(7) material mixed is handled to 4 hours in 80 DEG C of baking oven, twin-screw finally is added in the material of drying
In machine, shear granulation, temperature sets 190 DEG C, setting speed 100r/min.Suitable plastic pellet is finally obtained, and is utilized
It is to be measured that standard batten is made in injection molding machine.
The performance test results of gained composite material：Tensile strength：27.92MPa, impact strength：28.75MPa, surface electricity
Resistance：104Ω, relative wear resistance：1.25.
The present invention has found that carrying out compounding using graphene and carbon nanotube is used as conductive material, wherein graphite under study for action
The lamellar structure of alkene produces the complementation of structure with the fibre structure of carbon nanotube after the two compounding mixes, in conductive mistake
Cheng Zhong, the two energy field influence each other, and electron transfer capabilities are promoted, and electric conductivity are promoted, simultaneously because the complementary structure of the two
Property, enhance the mechanical performance of composite material.But since the two has the characteristic easily reunited, in the preparation of plastic composite
In the process, it is easy to generate and reunite and generate conductive inhomogenous effect, in existing means, often through increase conductive material
Incrementss obtain the electric conductivity of stable composite material.It is a discovery of the invention that molten as mixing using dimethylbenzene with absolute ethyl alcohol
Agent can be disperseed graphene and carbon nanotube using ultrasonic means, can change material surface characteristic using coupling agent,
The dispersion both further promoted, realizes being interweaved for graphene and carbon nanotube, forms the pre- place of stable homogeneous
Reason material, wherein dimethylbenzene and coupling agent play an important role for the dispersion of the two, and absolute ethyl alcohol provides dispersion liquid
Dispersant is added after being uniformly dispersed in solvent environment, the two, prevents from reuniting.Using plastic pellet and nylon as basic material, add
Enter toughener and bulking agent, plastic material is further increased while promoting plastic pellet with nylon compatibility and is expected with pretreatment
Compatibility and dispersibility, conductive material dispersion compatible mixture together can be obtained, eventually by drying and be granulated, go
Except mixed solvent, the uniform conducing composite material of performance is obtained, while improving the mechanical performance of composite material.
The present invention by experiments have shown that, the pretreatment of the conductive material carried out through the invention so that plastic pellet be modified
Post-tensioning intensity can promote 12% or more, and impact strength promotes 10% or more, and reaches in less conductive material additive amount
Well to a point effect, and electric conductivity is uniform.
Claims (10)
1. a kind of preparation method of the wear-resistant conductive composite material containing graphene, which is characterized in that include the following steps：
（1）Graphene and carbon nanotube it is surface-functionalized：The anhydrous second containing coupling agent is added in graphene and carbon nanotube
The in the mixed solvent of alcohol and dimethylbenzene stirs evenly, then progress ultrasonic vibration 4-20 hours within the temperature range of 20-50 DEG C, so
After dispersant is added, be stirred, obtain pretreatment material；
（2）Plastic pellet, nylon, toughener, bulking agent and brightener are uniformly mixed, step is added（1）Obtained pre- place
Reason material, is stirred 15-30 minutes, and whipping temp is 40-60 DEG C, is formed and premixes uniform mixture；
（3）The mixture of gained is dried, then is granulated, the wear-resistant conductive plastic composite wood of uniformly mixed graphene is obtained
Material.
2. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（1）The weight percent that middle each component is added is as follows：Graphene 1-5%, carbon nanotube 5-15%, coupling agent 1-5%, dispersant
1-5%, absolute ethyl alcohol 60-80%, dimethylbenzene 5-10%, the sum of percentage that the above components are added are 100%.
3. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（2）The weight percent of middle each component is as follows：Plastic pellet 55-70%, nylon 5-15%, toughener 2-10%, bulking agent 1-
5%, pretreatment material 10-20%, brightener 0.5-3%, the sum of percentage of the above components are 100%.
4. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（1）Middle coupling agent is silane coupling agent, and dispersant is dispersant WS7010, step（2）Middle brightener is brightener A388.
5. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（1）Middle graphene is thin layer or multilayer material, and thickness 1-10nm, 1-5 μm of piece diameter, carbon nanotube are multi wall carbon pipe, diameter
To be more than 50nm, length 10-30um.
6. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（2）Described in plastic pellet be the plastic pellet that is prepared of general-purpose plastics；The nylon is the Buddhist nun that fusing point is 160-210 DEG C
Dragon.
7. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（2）Middle toughener is DOP environmental protection class toughener；Bulking agent is styrene-maleic anhydride copolymer class bulking agent.
8. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（3）The temperature of middle drying is 80 DEG C, drying time 4-6 hours.
9. the preparation method of the wear-resistant conductive composite material according to claim 1 containing graphene, which is characterized in that step
Suddenly（3）Middle granulation is granulated using double screw extruder, and the temperature of granulation is 180 DEG C -210 DEG C, and rotating speed is that 50-100 turns every
Minute.
10. the preparation method of the wear-resistant conductive composite material according to claim 6 containing graphene, which is characterized in that
The general-purpose plastics is any one in polystyrene plastics, ABS plastic, vinyon or polypropylene plastics.
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| CN112391117A (en) * | 2020-11-06 | 2021-02-23 | 北京国电富通科技发展有限责任公司 | Graphene-carbon nanotube conductive spray for wire clamp contact part of live working robot |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108948550A (en) * | 2018-08-01 | 2018-12-07 | 国网安徽省电力有限公司六安供电公司 | A kind of weather-proof graphene conductive heat-conductive composite material and preparation method thereof |
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| CN112391117A (en) * | 2020-11-06 | 2021-02-23 | 北京国电富通科技发展有限责任公司 | Graphene-carbon nanotube conductive spray for wire clamp contact part of live working robot |
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