A kind of high thermal conductivity graphene-based polycarbonate composite material and preparation method thereof
Technical field
The present invention relates to polymeric material field, be related specifically to a kind of high thermal conductivity graphene-based polycarbonate composite material and preparation method thereof。
Background technology
Merlon is the engineering plastics using growth rate the fastest in recent years, there is the features such as high elastic coefficient, high impact, high transparent, weatherability and avirulence, be widely used in the fields such as CD, automobile, office equipment, casing, packaging, medicine, illumination, thin film。But the heat conductivity of Merlon is not high, only 0.17W/m k, being far not by far up to the mark in industries such as automobile, LED, electronic packagings, this needs us by Heat Conduction Material, Merlon to be modified。
All adopting metal packing for the heat conductivility of polycarbonate plastic is modified in prior art, such as argentum powder, copper powder, aluminium powder etc., but these fillers are expensive and it cannot be guaranteed that material has higher insulating properties。In order to overcome these shortcomings, it is thus proposed that adopt the materials such as aluminium oxide, carborundum, aluminium nitride to be filled with, but cost is still higher。
Summary of the invention
The present invention is in order to overcome the deficiency of above-mentioned technical problem, it is provided that a kind of high thermal conductivity graphene-based polycarbonate composite material, it is possible to be fully solved above-mentioned technical problem。
The technical scheme solving above-mentioned technical problem is as follows:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components:
Described material with carbon element is one or more the compositions in the heat conduction white carbon black of zero dimension, one-dimensional carbon fiber or CNT, two-dimentional single-layer graphene or graphene microchip。
Described antioxidant is one or more in single phenol, bis-phenol, triphenol, hydroquinone, thiobisphenol。
Described plasticizer is one or more in Methyl Benzene-o-dicarboxylate, ethyl phthalate, O-phthalic propyl propionate, butyl phthalate, octyl phthalate。
Described coupling agent is one or more in KH550, KH560, KH570, KH580。
The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, comprises the following steps:
(1) by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;
(2) by said mixture dry 6~10h at 120~150 DEG C;
(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Described double screw extruder each district temperature is at 170~250 DEG C, and screw speed is 10~40rpm, and feeding rotating speed is 6~10rpm, and pelleter rotating speed is 120~200rpm。
This high thermal conductivity graphene-based polycarbonate composite material can be used for sealed cabinet, motor coil, LED heat sink or electric-device housing field。
The present invention adopts material with carbon element that Merlon is modified, and adopts zero dimension, one-dimensional and Two-dimensional Carbon material to build three dimentional heat conduction network structure in polycarbonate matrix, increases the compatibility between Merlon and material with carbon element by the polypropylene of maleic anhydride graft。This new invention significantly reduces on the one hand the cost of filler, is adopt zero dimension, one-dimensional, two-dimensional material can be effectively improved the heat conductivility of Merlon to build three dimentional heat conduction network on the other hand。The composite of the present invention can be used for the fields such as sealed cabinet, motor coil, LED heat sink, electric-device housing。Preparation process of the present invention is continuous, technique simple, be suitable for large-scale production。
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation。
Embodiment 1:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components: polycarbonate masterbatch 50 parts;Heat conduction white carbon black 0.3 part, 0.3 part of carbon fiber, single-layer graphene 0.4 part;The polypropylene of maleic anhydride graft 2 parts;1 part of antioxidant list phenol;Plasticizer phthalic acid methyl ester 1 part;KH550 coupling agent 0.1 part。The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, comprise the following steps: (1) is by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;(2) by said mixture dry 10h at 120 DEG C;(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Double screw extruder each district temperature is at 170 DEG C, and screw speed is 10rpm, and feeding rotating speed is 6rpm, and pelleter rotating speed is 120rpm。This composite can be used for sealed cabinet field。
Embodiment 2:
Take the polypropylene mix homogeneously of the maleic anhydride graft of the graphene microchip of 1 mass parts, the heat conduction white carbon black of 1 mass parts, the heat conduction carbon fiber of 0.1 mass parts, the single-layer graphene of 0.1 mass parts, 2 mass parts, add the polycarbonate masterbatch of 100 mass parts, mix homogeneously again, is eventually adding the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, screw speed is 20rpm。
Embodiment 3:
Take the polypropylene mix homogeneously of the maleic anhydride graft of the graphene microchip of 2 mass parts, the heat conduction white carbon black of 2 mass parts, the heat conduction carbon fiber of 0.1 mass parts, the single-layer graphene of 0.1 mass parts, 2 mass parts, add the polycarbonate masterbatch of 100 mass parts, mix homogeneously again, is eventually adding the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, screw speed is 20rpm。
Embodiment 4:
Take the polypropylene mix homogeneously of the maleic anhydride graft of the graphene microchip of 4 mass parts, the heat conduction carbon fiber of 0.1 mass parts, the single-layer graphene of 0.1 mass parts, 2 mass parts, add the polycarbonate masterbatch of 100 mass parts, mix homogeneously again, is eventually adding the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, screw speed is 20rpm。
Embodiment 5:
Take the polypropylene mix homogeneously of the maleic anhydride graft of the heat conduction white carbon black of 4 mass parts, the heat conduction carbon fiber of 0.1 mass parts, the single-layer graphene of 0.1 mass parts, 2 mass parts, add the polycarbonate masterbatch of 100 mass parts, mix homogeneously again, is eventually adding the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, screw speed is 20rpm。
Embodiment 6:
Take the polypropylene mix homogeneously of the maleic anhydride graft of the graphene microchip of 2 mass parts, the heat conduction white carbon black of 2 mass parts, the heat conduction carbon fiber of 0.5 mass parts, the single-layer graphene of 0.5 mass parts, 2 mass parts, add the polycarbonate masterbatch of 100 mass parts, mix homogeneously again, is eventually adding the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, screw speed is 20rpm。
Comparative example:
Take the Merlon of 100 mass parts, add the coupling agent of the antioxidant of 2 mass parts, the plasticizer of 2 mass parts, 0.5 mass parts。Then above-mentioned raw materials is dried 6 hours at 120 DEG C, send into extrusion in double screw extruder, use pelleter pelletize。Screw rod each district temperature is: 230 DEG C of a district, 240 DEG C of 2nd district, 240 DEG C of 3rd district, 240 DEG C of 4th district, 240 DEG C of 5th district, head temperature 230 DEG C, and screw speed is 20rpm, obtains as shown in table 1 below with the concrete outcome of embodiment 2-6:
By upper table 1 it can be seen that the heat conductivility of the composite of the three dimentional heat conduction network built by zero dimension, one-dimensional, Two-dimensional Carbon material is best, and having lacked the material of any dimension therein, heat conductivity can decline to some extent。
Embodiment 7:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components: polycarbonate masterbatch 90 parts;Heat conduction white carbon black 1 part, CNT 2 parts, graphene microchip 2 parts;The polypropylene of maleic anhydride graft 5 parts;Antioxidant bis-phenol 2 parts, triphenol 3 parts;Plasticizer phthalic acid ethyl ester 2 parts, O-phthalic propyl propionate 3 parts;KH560 coupling agent 0.5 part, KH570 coupling agent 0.5 part。The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, comprise the following steps: (1) is by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;(2) by said mixture dry 6h at 150 DEG C;(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Double screw extruder each district temperature is at 250 DEG C, and screw speed is 40rpm, and feeding rotating speed is 10rpm, and pelleter rotating speed is 200rpm。This composite can be used for motor coil field。
Embodiment 8:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components: polycarbonate masterbatch 50~100 parts;Material with carbon element 1~5 part;The polypropylene of maleic anhydride graft 2~5 parts;Antioxidant 1~5 part;Plasticizer 1~5 part;Coupling agent 0.1~1 part。Described material with carbon element is the mixture of zero dimension filler, one-dimensional filler and two dimension filler, described zero dimension filler is heat conduction white carbon black, described one-dimensional filler is one or both the mixture in carbon fiber or CNT, and described two-dimentional filler is one or both mixture of single-layer graphene or graphene microchip。Described antioxidant is one or more in single phenol, bis-phenol, triphenol, hydroquinone, thiobisphenol。Described plasticizer is one or more in Methyl Benzene-o-dicarboxylate, ethyl phthalate, O-phthalic propyl propionate, butyl phthalate, octyl phthalate。Described coupling agent is one or more in KH550, KH560, KH570, KH580。The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, it is characterised in that comprise the following steps:
(1) by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;
(2) by said mixture dry 6~10h at 120~150 DEG C;
(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Described double screw extruder each district temperature is at 170~250 DEG C, and screw speed is 10~40rpm, and feeding rotating speed is 6~10rpm, and pelleter rotating speed is 120~200rpm。
This composite can be used for sealed cabinet, motor coil, LED heat sink or electric-device housing field。
Embodiment 9:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components: polycarbonate masterbatch 80 parts;Heat conduction white carbon black 0.5 part, 0.5 part of carbon fiber, CNT 1 part, single-layer graphene 0.5 part, graphene microchip 0.5 part;The polypropylene of maleic anhydride graft 4 parts;Antioxidant hydroquinone 3 parts;Plasticizer phthalic acid butyl ester 2 parts, octyl phthalate 2 parts;KH580 coupling agent 0.5 part。The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, it is characterized in that, comprise the following steps: (1) is by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;(2) by said mixture dry 7h at 130 DEG C;(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Described double screw extruder each district temperature is at 200 DEG C, and screw speed is 30rpm, and feeding rotating speed is 7rpm, and pelleter rotating speed is 180rpm。This composite can be used for LED heat sink field。
Embodiment 10:
A kind of high thermal conductivity graphene-based polycarbonate composite material, by weight, including following components: polycarbonate masterbatch 60 parts;Heat conduction white carbon black 0.5 part, CNT 0.5 part, graphene microchip 1 part;The polypropylene of maleic anhydride graft 2.5 parts;Antioxidant hydroquinone 1 part, thiobisphenol 2 parts;Plasticizer phthalic acid methyl ester 1 part, octyl phthalate 1 part;KH550 coupling agent 0.7 part, KH580 coupling agent 0.2 part。The preparation method of this high thermal conductivity graphene-based polycarbonate composite material, comprise the following steps: (1) is by the polypropylene mix homogeneously of material with carbon element, maleic anhydride graft, then again mix homogeneously with polycarbonate masterbatch, be finally sequentially added into antioxidant, plasticizer and coupling agent;(2) by said mixture dry 9.5h at 145 DEG C;(3) above-mentioned dried mixture is sent into double screw extruder extrusion, then by pelleter pelletize;Described double screw extruder each district temperature is at 210 DEG C, and screw speed is 25rpm, and feeding rotating speed is 6rpm, and pelleter rotating speed is 125rpm。This composite can be used for electric-device housing field。
The present invention adopts material with carbon element that Merlon is modified, and adopts zero dimension, one-dimensional and Two-dimensional Carbon material to build three dimentional heat conduction network structure in polycarbonate matrix, increases the compatibility between Merlon and material with carbon element by the polypropylene of maleic anhydride graft。This new invention significantly reduces on the one hand the cost of filler, is adopt zero dimension, one-dimensional, two-dimensional material can be effectively improved the heat conductivility of Merlon to build three dimentional heat conduction network on the other hand。The composite of the present invention can be used for the fields such as sealed cabinet, motor coil, LED heat sink, electric-device housing。Preparation process of the present invention is continuous, technique simple, be suitable for large-scale production。
The above, be only presently preferred embodiments of the present invention, the present invention not does any pro forma restriction, any simple modification that above example is made by every technical spirit according to the present invention, equivalent variations, each falls within protection scope of the present invention。