CN114276666B - High-gloss high-surface-hardness polycarbonate composite material and preparation method thereof - Google Patents
High-gloss high-surface-hardness polycarbonate composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-gloss high-surface-hardness polycarbonate composite material and a preparation method thereof, wherein the polycarbonate composite material is prepared from the following raw materials in parts by weight: 55-80 parts of silicon-copolymerized PC, 10-20 parts of PETG, 5-10 parts of AS, 2-5 parts of hollow glass beads, 0.1-0.4 part of graphene, 2-5 parts of toughening agent, 1-5 parts of compatilizer, 0.2-0.6 part of antioxidant, 0.2-0.6 part of lubricant, 0.2-0.5 part of light aging agent and 0.5-2 parts of organic high-gloss black toner; in the preparation method, the graphene-coated hollow glass microspheres are used as the auxiliary scratch-resistant agent, and compared with the polycarbonate material prepared by adding the silicone auxiliary agent in the existing method, the surface of the prepared polycarbonate composite material has the characteristics of high glossiness, higher surface hardness and better scratch-resistant effect, and the comprehensive properties of the material, such as temperature resistance, mechanical property and the like, are greatly improved, so that the application in extreme environments is met.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a high-gloss high-surface-hardness polycarbonate composite material and a preparation method thereof.
Background
The prior high-gloss Polycarbonate (PC) has excellent impact resistance, stability and heat resistance, but has poor processing fluidity, relatively low material surface hardness and poor scratch resistance, and limits the application of PC materials in high-gloss appearance products. At present, the melt preparation of composite materials with good properties by blending different polymer materials has become a common way. A PC/ABS blending system obtained by adding acrylonitrile-butadiene-styrene plastic (ABS) into PC reduces the temperature in the processing process and improves the solvent resistance of PC, but ABS and PC are actually incompatible systems, so that the prepared PC/ABS alloy has insufficient blackness and poor scratch resistance; polymethyl methacrylate (PMMA) has excellent high hardness, high rigidity and high gloss, PMMA/ASA alloy prepared by blending PMMA and ASA resin effectively improves the surface gloss and scratch resistance of the PMMA/ASA alloy, and the alloy surface blackness is good, but the PMMA/ASA alloy has the problem of low thermal deformation temperature, and the use of parts in extreme environments is influenced. The invention discloses a high-gloss long-acting solvent-resistant polycarbonate material and a preparation method thereof, wherein the polycarbonate material prepared from 81-94% of polycarbonate, 2-10% of polyurethane, 2-8% of flame retardant, 0.1-0.5% of antioxidant and 0.2-0.5% of lubricant has good surface gloss, impact resistance and solvent resistance, but the mechanical property is poor, and the added silicone auxiliary agent can cause the surface hardness of the material to be influenced, so that the application of the polycarbonate material is limited.
Disclosure of Invention
Aiming at the problems of poor compatibility, poor surface gloss and hardness, poor scratch resistance effect, low thermal deformation temperature, poor use effect in extreme environment and the like of the existing polymer composite material, the invention provides the high-gloss high-surface hardness polycarbonate composite material and the preparation method thereof.
In order to solve the technical problems, the invention adopts a technical scheme that:
the high-gloss high-surface-hardness polycarbonate composite material is prepared from the following raw materials in parts by weight:
55-80 parts of silicon copolymerized PC;
10-20 parts of PETG;
5-10 parts of AS;
2-5 parts of hollow glass beads;
0.1-0.4 parts of graphene;
2-5 parts of a toughening agent;
1-5 parts of a compatilizer;
0.2-0.6 part of antioxidant;
0.2-0.6 parts of lubricant;
0.2-0.5 parts of light aging agent;
0.5-2 parts of organic high-gloss black toner.
Furthermore, the silicon copolymerized PC is sabheck 1414T silicon copolymerized polycarbonate, and has better low temperature resistance effect, good weather resistance, good wear resistance and good scratch resistance compared with common PC.
Further, the PETG is Korea SK K2012 poly (ethylene terephthalate-1, 4-cyclohexadienedimethylene terephthalate), has excellent high gloss, high transparency and high scratch resistance, has good compatibility with PC, and can be used for preparing high-gloss and high-black materials.
Furthermore, the AS is NF2200 styrene-acrylonitrile copolymer which is purchased from Taiwan chemical company, has better chemical resistance and high surface hardness, and has great help for improving the processability, stress cracking resistance and chemical resistance of PC.
Further, the toughening agent is an S-2030 toughening agent containing a silicon segment, and is available from Mitsubishi Yang corporation.
Further, the compatilizer is SMA-020 styrene-maleic anhydride binary random copolymer, which is available from Ikegay company.
Further, the antioxidant is an antioxidant 1076 and an antioxidant 168, and the mass ratio of the antioxidant 1076 to the antioxidant 168 is 1: 1.
further, the lubricant is pentaerythritol stearate (PETS).
Further, the light aging agent is an ultraviolet light absorber UV-234.
Further, the organic high gloss black powder is aniline black.
Further, the hollow glass beads are iM16K hollow glass beads which are purchased from Heshi wall chemical company, the density of the hollow glass beads is 0.125-0.60g/cc, and the particle size is 15-135 μm.
Further, the graphene is 5-10 μm in diameter and 3-10nm in thickness, and is purchased from Nanjing Xiapong Nanoji.
The polycarbonate composite material with high gloss and high surface hardness comprises the following preparation steps:
step (1): drying the graphene dispersed by the solvent, mixing the graphene with hollow glass beads, adding the mixture into a high-speed mixer, and premixing for 5-15min at the temperature of 40-60 ℃ to obtain the hollow glass beads which are uniformly mixed and the surfaces of which are wrapped with the graphene;
step (2): respectively placing the silicon copolymerization PC, PETG and AS raw materials in a drying oven at 80-100 ℃ for drying for 2-4h, and removing water; taking out the dried silicon copolymerization PC, PETG and AS raw materials for later use; adding the dried silicon copolymerized PC, PETG, AS, toughening agent, compatilizer, antioxidant, lubricant, light aging agent and organic high-gloss black powder raw materials into the high-speed mixer in the step (1) according to the raw material composition of each part by weight, and continuously mixing for 10-15min at the temperature of 40-60 ℃ to obtain a mixture;
and (3): adding the mixture obtained in the step (2) into a main feeding cylinder of a double-screw extruder, mixing, melting, homogenizing and extruding through the double-screw extruder, extruding and bracing under the conditions that the extrusion temperature of each zone of the double-screw extruder is 170-;
and (4): and (4) drying the polycarbonate composite granules obtained in the step (3) in an oven at the temperature of 80-120 ℃ for 4-6h, taking out, carrying out injection molding by using an injection molding machine to process the dried granules, and preparing corresponding standard sample strips to obtain the high-gloss high-surface-hardness polycarbonate composite material.
Further, the length-diameter ratio of the extrusion screw of the double-screw extruder is 44: 1.
further, the first zone temperature of the twin-screw extruder is 170 ℃, the second zone temperature is 200 ℃, the third zone temperature is 210 ℃, the fourth zone temperature is 220 ℃, the fifth zone temperature is 230 ℃, the sixth zone temperature is 240 ℃, the seventh zone temperature is 250 ℃, the eighth zone temperature is 250 ℃, the ninth zone temperature is 240 ℃ and the head temperature is 240 ℃.
Further, the injection temperature of the injection molding machine is 220-260 ℃.
Further, in the step (1), the graphene is dispersed in a solvent, and the drying specifically comprises the following steps:
adding graphene into a pure water solution containing surfactant polyvinylpyrrolidone and sodium taurodeoxycholate, and performing ultrasonic treatment and dispersion for 0.5-2h to obtain a mixed solution; placing the mixed solution in a high-pressure homogenizer, stripping the homogenized liquid phase for 0.5-1h under the pressure of 30-100MPa, and repeating for 3-8 times to obtain a homogenized graphene suspension; and transferring the homogenized graphene suspension into a centrifuge, centrifuging for 15-30min at the rotating speed of 2000-.
Further, a data control module and a data acquisition module are arranged in the oven in the step (4);
circulating air heaters are arranged on the left inner side wall, the right inner side wall, the top and the bottom in the oven;
a rolling stainless steel mesh cylinder is also arranged in the oven;
the data control module is used for setting oven parameters, and the oven parameters comprise: the rotating speed of the rolling stainless steel mesh cylinder, the hot air temperature, the hot air volume, the hot air pressure and the air blowing time of the left and right inner side walls, the top and the bottom circulating air heaters;
the rolling type stainless steel mesh cylinder is a mesh-shaped closed mesh cylinder, a charging hole is formed in the side part of the rolling type stainless steel mesh cylinder, and the mesh number of the rolling type stainless steel mesh cylinder is 120 meshes;
the inner surface of the rolling stainless steel mesh cylinder is provided with a temperature and humidity sensor which is in full contact with materials filled into the rolling stainless steel mesh cylinder for drying, and the temperature and humidity sensor transmits temperature and humidity data of polycarbonate compound granules in the rolling stainless steel mesh cylinder to the data acquisition module at regular time.
Further, in the step (4), the polycarbonate compound granules are dried in an oven at 80-120 ℃ for 4-6h, and the specific steps are as follows:
inputting the polycarbonate composite granules obtained in the step (3) into a rolling stainless steel net drum in the oven through the charging opening, and simultaneously closing the charging opening of the net drum;
the hot air temperature of the circulating air heater at the top of the drying oven is 100-120 ℃, and the hot air volume is 3-5m3At the pressure of 800-;
stopping the circulating air heater at the top of the oven, starting the circulating air heater at the left side of the oven, and continuing to circulate the hot air of the air heater at the left side of the oven, wherein the hot air temperature of the circulating air heater is 100-3At the pressure of 800-Moisture of the pellets;
starting the circulating air heaters on the left inner side wall, the right inner side wall, the top and the bottom of the oven, wherein the hot air temperature of the circulating air heaters is 80-100 ℃, and the hot air volume is 3-4m3Blowing hot air to a rolling stainless steel mesh cylinder with the rotating speed of 50-70rpm/min for 2h under the pressure of 600-.
The invention has the beneficial effects that:
the high-gloss high-surface-hardness polycarbonate composite material provided by the invention has the advantages that the silicon copolymerization PC selected in the preparation process, the PETG and the AS basic raw materials have good compatibility, and the processability, stress cracking resistance and chemical resistance of the PC are effectively improved by a composite system after melt blending.
According to the high-gloss high-surface-hardness polycarbonate composite material and the preparation method, the graphene-coated hollow glass beads are used as an auxiliary scratch-resistant agent, so that the friction coefficient of the surface of the material is reduced, and the lubricity and hardness of the surface of the polycarbonate composite material are improved; the polycarbonate composite material has the advantages that the polycarbonate composite material has high surface hardness, better scratch resistance effect and greatly improved comprehensive properties such as temperature resistance, mechanical property and the like, and can be applied in extreme environments.
According to the high-gloss high-surface-hardness polycarbonate composite material and the preparation method, pure water added with a surfactant is used as a solvent, graphene is dispersed, and the graphene with high uniformity and high concentration is obtained after ultrasonic treatment, homogenization, centrifugation and drying, so that the adsorbability and the wrapping property between the graphene and hollow glass beads are improved; the process is simple and easy to operate, is green and environment-friendly, directly avoids the adverse effects of using an organic solvent as a dispersing agent on products and the environment, and simultaneously reduces the production cost of a complex process for removing the organic solvent.
The high-gloss high-surface-hardness polycarbonate composite material and the preparation method provided by the invention have the advantages that polycarbonate composite granules are blown and dried by alternating hot air, the moisture of the polycarbonate composite granules in the rolling stainless steel mesh cylinder is taken away, the rolling stainless steel mesh cylinder filled with the polycarbonate composite granules is turned over in real time, the uniformity of the polycarbonate composite granules dried by hot air of an oven is ensured, and the adverse phenomena of material flowers or air lines and the like on the surface of a product in the injection molding process caused by uneven drying of the polycarbonate composite granules are avoided.
Drawings
FIG. 1 is a flow chart of a method for preparing a high gloss high surface hardness polycarbonate composite material according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The examples of the invention and the comparative examples used the following raw materials:
silicon copolpc is sapick 1414T silicon copoly carbonate.
PETG was Korea SK K2012 poly (ethylene terephthalate-1, 4-cyclohexadienedimethylene terephthalate).
AS was NF2200 styrene-acrylonitrile copolymer available from Takara Shuzo.
The toughening agent was an S-2030 toughening agent containing a silicon segment, available from Mitsubishi Yang corporation.
The compatibilizer was SMA-020 styrene-maleic anhydride dyadic random copolymer, available from seiko corporation.
The antioxidant is an antioxidant 1076 and an antioxidant 168, and the mass ratio of the antioxidant 1076 to the antioxidant 168 is 1: 1.
the lubricant is pentaerythritol stearate (PETS).
The light aging agent is an ultraviolet absorbent UV-234.
The organic highlight black powder is aniline black.
The hollow glass beads are iM16K hollow glass beads, the density of the hollow glass beads is 0.125-0.60g/cc, the particle size is 15-135 μm, and the hollow glass beads are purchased from Heshi wall chemical company.
Graphene is 5-10 μm in diameter and 3-10nm thick, and is available from Nanjing Xiapong Nanko.
Example 1
In example 1, the raw materials and the weight ratio of the polycarbonate composite material with high gloss and high surface hardness are shown in table 1;
the high-gloss high-surface-hardness polycarbonate composite material is prepared according to the weight part ratio of the raw materials in the table 1, and comprises the following steps:
step (1): organically treating graphene, drying, mixing with hollow glass beads, adding into a high-speed mixer, and premixing for 15min at the temperature of 60 ℃ to obtain the hollow glass beads which are uniformly mixed and coated with the graphene on the surfaces;
step (2): respectively placing the silicon copolymerization PC, PETG and AS raw materials in a drying oven at 100 ℃ for drying for 3 hours, and removing water; taking out the dried silicon copolymerized PC, PETG and AS raw materials, adding the dried silicon copolymerized PC, PETG, AS, toughening agent, compatilizer, antioxidant, lubricant, light aging agent and organic highlight black powder raw materials into the high-speed mixer in the step (1) according to the mixture ratio in the table 1, and continuously mixing for 10min at the temperature of 60 ℃ to obtain a mixture;
and (3): adding the mixture obtained in the step (2) into a main feeding cylinder of a double-screw extruder, and mixing, melting, homogenizing and extruding the mixture by the double-screw extruder, wherein the temperature of a first zone of the double-screw extruder is 170 ℃, the temperature of a second zone of the double-screw extruder is 200 ℃, the temperature of a third zone of the double-screw extruder is 210 ℃, the temperature of a fourth zone of the double-screw extruder is 220 ℃, the temperature of a fifth zone of the double-screw extruder is 230 ℃, the temperature of a sixth zone of the double-screw extruder is 240 ℃, the temperature of a seventh zone of the double-screw extruder is 250 ℃, the temperature of an eighth zone of the double-screw extruder is 250 ℃, the temperature of a ninth zone of the double-screw extruder is 240 ℃ and the temperature of a machine head of the double-screw extruder is 240 ℃; extruding and bracing the polycarbonate under the condition that the rotating speed of the screw is 300r/min, cooling the extruded and braced polycarbonate by water, and granulating to obtain polycarbonate compound granules;
and (4): and (3) drying the polycarbonate composite granules obtained in the step (3) in an oven at the temperature of 80-120 ℃ for 4-6h, taking out, injection molding by using a injection molding machine at the temperature of 250-260 ℃ to process the dried granules to prepare corresponding standard sample strips, and thus obtaining the high-gloss high-surface-hardness polycarbonate composite material.
The length-diameter ratio of an extrusion screw of the double-screw extruder is 44: 1.
example 2
In example 2, the raw materials and the weight ratio of the polycarbonate composite material with high gloss and high surface hardness are shown in table 1; a polycarbonate composite was prepared according to the preparation method described in example 1.
Example 3
In example 3, the raw materials and the weight ratio of the polycarbonate composite material with high gloss and high surface hardness are shown in table 1; a polycarbonate composite was prepared according to the preparation method described in example 1.
Example 4
In example 4, the raw materials and the weight ratio of the polycarbonate composite material with high gloss and high surface hardness are shown in table 1; a polycarbonate composite was prepared according to the preparation method described in example 1.
Example 5
In example 5, the raw materials and the weight ratio of the polycarbonate composite material with high gloss and high surface hardness are shown in table 1; a polycarbonate composite was prepared according to the preparation method described in example 1.
Comparative example 1
The raw materials and weight ratio of the composite material in comparative example 1 are shown in table 1, and the composite material was prepared according to the preparation method described in example 1.
Comparative example 2
The raw materials and the weight ratio of the composite material in comparative example 2 are shown in table 1, and the composite material was prepared according to the preparation method described in example 1.
Comparative example 3
The raw materials and the weight ratio of the composite material in comparative example 3 are shown in table 1, and the composite material was prepared according to the preparation method described in example 1.
TABLE 1
The standard sample bars prepared in examples 1 to 5 and comparative examples 1 to 3 were used for testing mechanical properties, bending properties, impact properties, heat distortion temperature, specular gloss, color difference, hardness (scratch resistance) properties; the test criteria and test results are shown in table 2:
TABLE 2
The results in Table 2 show that the compatibility of the silicon copolymerization PC, PETG and AS basic raw materials selected in the preparation is good, and the comprehensive properties of the obtained polycarbonate composite material, such AS mechanical property, bending property, impact resistance, temperature resistance and the like, are greatly improved; the graphene-coated hollow glass beads are used as an auxiliary scratch-resistant agent, so that the friction coefficient of the surface of the material is reduced, and the lubricity and hardness of the surface of the polycarbonate composite material are improved, and the results of examples 1-5 show that the mirror surface glossiness and the surface hardness of the prepared polycarbonate composite material are obviously superior to those of comparative examples 1-3, and the pencil hardness of the surface of the composite material in examples 2-3 reaches 3H, which shows that the prepared polycarbonate composite material has excellent scratch-resistant performance.
Example 6
In the preparation method of the high-gloss high-surface-hardness polycarbonate composite material, the graphene is dispersed in the solvent in the step (1), and the drying specifically comprises the following steps:
adding graphene into a pure water solution containing surfactant polyvinylpyrrolidone and sodium taurodeoxycholate, and performing ultrasonic treatment and dispersion for 1.5h to obtain a mixed solution; placing the mixed solution in a high-pressure homogenizer, homogenizing the liquid phase under the pressure of 100MPa, stripping for 1h, and repeating for 5-8 times to obtain a homogenized graphene suspension; and transferring the homogenized graphene suspension into a centrifuge, centrifuging for 30min at a rotating speed of 3000r/min to obtain graphene aqueous dispersion, taking out, and drying in an oven at 100 ℃ for later use.
The working principle and the beneficial effects of the embodiment are as follows: pure water added with a surfactant is used as a solvent, graphene is dispersed, and the graphene with high uniformity and high concentration is obtained after ultrasonic treatment, homogenization, centrifugation and drying, so that the adsorbability and the wrapping property between the graphene and the hollow glass beads are improved; the process is simple and easy to operate, is green and environment-friendly, directly avoids the adverse effects of using an organic solvent as a dispersing agent on products and the environment, and simultaneously reduces the production cost of a complex process for removing the organic solvent.
Example 7
In the preparation method of the high-gloss high-surface-hardness polycarbonate composite material, in the step (4), the polycarbonate composite granules are dried in an oven at the temperature of 80-120 ℃ for 4-6h, and the specific steps are as follows:
inputting the polycarbonate composite granules obtained in the step (3) into a rolling stainless steel net drum in the oven through the charging opening, and simultaneously closing the charging opening of the net drum;
the hot air temperature of the circulating air heater at the top of the oven is 120 ℃, and the hot air quantity is 5m3At the temperature of 900Pa of hot air, vertically passing the hot air through a rolling stainless steel mesh cylinder with the rotating speed of 65rpm from top to bottom, blowing the hot air for 1.5h, and carrying out moisture of polycarbonate compound granules in the rolling stainless steel mesh cylinder;
stopping the circulating air heater at the top of the oven, starting the circulating air heater at the left side of the oven, and continuously keeping the hot air temperature of the circulating air heater at 120 ℃ and the hot air quantity at 5m3Under the pressure of 900Pa of hot air and the pressure of the hot air, the hot air transversely passes through a rolling stainless steel net cylinder with the rotating speed of 65rpm from left to right, the hot air is blown for 1.5 hours, and the moisture of the polycarbonate compound granules in the rolling stainless steel net cylinder is brought out;
starting the circulating air heaters on the left inner side wall, the right inner side wall, the top and the bottom of the oven, wherein the hot air temperature of the circulating air heaters is 100 ℃, and the hot air volume is 4m3And blowing hot air to a rolling stainless steel mesh cylinder with the rotating speed of 50rpm/min for 2 hours under the conditions of/min and the hot air pressure of 800Pa, and ensuring that polycarbonate compound granules in the rolling stainless steel mesh cylinder are dried uniformly.
The working principle and the beneficial effects of the embodiment are as follows: the polycarbonate composite granules are dried by alternate hot air blowing, the moisture of the polycarbonate composite granules in the rolling stainless steel mesh cylinder is taken away, the rolling stainless steel mesh cylinder filled with the polycarbonate composite granules is turned over in real time, the uniformity of the polycarbonate composite granules dried by hot air in an oven is ensured, and the adverse phenomena of material flower or gas lines and the like on the surface of a product in the injection molding process caused by uneven drying of the polycarbonate composite granules are avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims and their equivalents, as they are directly or indirectly applied to other related arts.
Claims (10)
1. The polycarbonate composite material with high gloss and high surface hardness is characterized by being prepared from the following raw materials in parts by weight:
55-80 parts of silicon copolymerized PC;
10-20 parts of PETG;
5-10 parts of AS;
2-5 parts of hollow glass beads;
0.1-0.4 parts of graphene;
2-5 parts of a toughening agent;
1-5 parts of a compatilizer;
0.2-0.6 part of antioxidant;
0.2-0.6 parts of lubricant;
0.2-0.5 parts of light aging agent;
0.5-2 parts of organic highlight black powder.
2. The high gloss high surface hardness polycarbonate composite of claim 1, wherein:
the silicon copolymerized PC is Saibokc 1414T silicon copolymerized polycarbonate;
the PETG is Korea SK K2012 poly (ethylene terephthalate-1, 4-cyclohexadienedimethylene terephthalate);
the AS is a Tailored NF2200 styrene-acrylonitrile copolymer;
the toughening agent is a Mitsubishi Yang S-2030 toughening agent containing a silicon chain segment;
the compatilizer is preferably easy SMA-020 styrene-maleic anhydride binary random copolymer;
the antioxidant is an antioxidant 1076 and an antioxidant 168, and the mass ratio of the antioxidant 1076 to the antioxidant 168 is 1: 1;
the lubricant is pentaerythritol stearate;
the light aging agent is an ultraviolet absorbent UV-234;
the organic highlight black powder is aniline black.
3. The high gloss high surface hardness polycarbonate composite of claim 1, wherein the hollow glass bead is an iM16K hollow glass bead of Henschel chemical industry, the hollow glass bead having a density of 0.125-0.60g/cc and a particle size of 15-135 μm.
4. The high gloss high surface hardness polycarbonate composite of claim 1, wherein the graphene is Nanjing Cuofeng nanometer graphene, the diameter of the graphene is 5-10 μm, and the thickness of the graphene is 3-10 nm.
5. The process for preparing a high gloss high surface hardness polycarbonate composite material according to any one of claims 1 to 4, comprising the steps of:
step (1): drying the graphene dispersed by the solvent, mixing the graphene with hollow glass beads, adding the mixture into a high-speed mixer, and premixing for 5-15min at the temperature of 40-60 ℃ to obtain the hollow glass beads which are uniformly mixed and the surfaces of which are wrapped with the graphene;
step (2): respectively placing the silicon copolymerization PC, PETG and AS raw materials in a drying oven at 80-100 ℃ for drying for 2-4h, and taking out for later use; adding the dried silicon copolymerized PC, PETG, AS, toughening agent, compatilizer, antioxidant, lubricant, light aging agent and organic high-gloss black powder raw materials into the high-speed mixer in the step (1) according to the raw material composition in parts by weight in the claim 1, and continuously mixing for 10-15min at the temperature of 40-60 ℃ to obtain a mixture;
and (3): adding the mixture obtained in the step (2) into a main feeding cylinder of a double-screw extruder, mixing, melting and extruding through the double-screw extruder, extruding and bracing under the conditions that the extrusion temperature of each zone of the double-screw extruder is 170-;
and (4): and (3) drying the polycarbonate composite granules obtained in the step (3) in an oven at the temperature of 80-120 ℃ for 4-6h, taking out, injection molding by using a injection molding machine at the temperature of 220-260 ℃ to process the dried granules to prepare corresponding standard sample strips, and thus obtaining the high-gloss high-surface-hardness polycarbonate composite material.
6. The method for preparing the polycarbonate composite material with high gloss and high surface hardness as claimed in claim 5, wherein the extrusion screw length-diameter ratio of the twin-screw extruder is 44: 1.
7. the method for preparing a polycarbonate composite material with high gloss and high surface hardness as claimed in claim 5, wherein the temperature of the twin screw in the first zone is 170 ℃, the temperature of the second zone is 200 ℃, the temperature of the third zone is 210 ℃, the temperature of the fourth zone is 220 ℃, the temperature of the fifth zone is 230 ℃, the temperature of the sixth zone is 240 ℃, the temperature of the seventh zone is 250 ℃, the temperature of the eighth zone is 250 ℃, the temperature of the ninth zone is 240 ℃ and the temperature of the head is 240 ℃.
8. The preparation method of the polycarbonate composite material with high gloss and high surface hardness as claimed in claim 5, wherein the graphene is solvent-dispersed in the step (1), and the drying comprises the following specific steps:
adding graphene into a pure water solution containing surfactant polyvinylpyrrolidone and sodium taurodeoxycholate, and performing ultrasonic treatment and dispersion for 0.5-2h to obtain a mixed solution; placing the mixed solution in a high-pressure homogenizer, stripping the homogenized liquid phase for 0.5-1h under the pressure of 30-100MPa, and repeating for 3-8 times to obtain a homogenized graphene suspension; and transferring the homogenized graphene suspension to a centrifuge, centrifuging for 15-30min at the rotating speed of 2000-5000r/min to obtain graphene aqueous dispersion, taking out, and drying in a drying oven at the temperature of 100-120 ℃ for later use.
9. The method for preparing the polycarbonate composite material with high gloss and high surface hardness as claimed in claim 5, wherein in the step (4), a data control module and a data acquisition module are arranged in the oven;
circulating air heaters are arranged on the left inner side wall, the right inner side wall, the top and the bottom in the oven;
a rolling stainless steel mesh cylinder is also arranged in the oven;
the data control module is used for setting oven parameters, and the oven parameters comprise: the rotating speed of the rolling stainless steel net barrel, the hot air temperature, the hot air quantity, the hot air pressure and the blowing time of the circulating air heaters on the left inner side wall, the right inner side wall, the top part and the bottom part;
the rolling type stainless steel mesh cylinder is a mesh-shaped closed mesh cylinder, a charging hole is formed in the side part of the rolling type stainless steel mesh cylinder, and the mesh number of the rolling type stainless steel mesh cylinder is 120 meshes;
the inner surface of the rolling stainless steel mesh cylinder is provided with a temperature and humidity sensor which is in full contact with materials filled into the rolling stainless steel mesh cylinder for drying, and the temperature and humidity sensor transmits temperature and humidity data of polycarbonate compound granules in the rolling stainless steel mesh cylinder to the data acquisition module at regular time.
10. The preparation method of the polycarbonate composite material with high gloss and high surface hardness as claimed in claim 5, wherein the polycarbonate composite granules in the step (4) are dried in an oven at 80-120 ℃ for 4-6h, and the specific steps are as follows:
inputting the polycarbonate composite granules obtained in the step (3) into a rolling stainless steel net drum in the oven through the charging opening, and simultaneously closing the charging opening of the net drum;
the hot air temperature of the circulating air heater at the top of the oven is 100-120 ℃, and the hot air quantity is 3-5m3At the temperature of 800-Blowing hot air for 1-2h by using a rolling stainless steel mesh cylinder at a rotating speed;
stopping the circulating air heater at the top of the oven, starting the circulating air heater at the left side of the oven, and continuing to circulate the hot air of the air heater at the left side of the oven, wherein the hot air temperature of the circulating air heater is 100-3At the pressure of 800-;
starting the circulating air heaters on the left inner side wall, the right inner side wall, the top and the bottom of the oven, wherein the hot air temperature of the circulating air heaters is 80-100 ℃, and the hot air volume is 3-4m3Blowing hot air to a rolling stainless steel mesh cylinder with the rotating speed of 50-70rpm/min for 2h under the pressure of 600-.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210089183.3A CN114276666B (en) | 2022-01-25 | 2022-01-25 | High-gloss high-surface-hardness polycarbonate composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106009582A (en) * | 2016-05-24 | 2016-10-12 | 深圳市富恒新材料股份有限公司 | Transparent PC composite and preparation method thereof |
| CN106589880A (en) * | 2016-11-16 | 2017-04-26 | 上海长伟锦磁工程塑料有限公司 | Transparent low-temperature-resistant scuffing-resistant polycarbonate composite material |
| CN109627728A (en) * | 2018-11-20 | 2019-04-16 | 上海长伟锦磁工程塑料有限公司 | A kind of transparent Weather resistant halogen-free flame retardant PC/PETG alloy material |
| CN110204879A (en) * | 2019-06-06 | 2019-09-06 | 广东圆融新材料有限公司 | Polycarbonate compositions and preparation method thereof |
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| US20070049703A1 (en) * | 2002-12-18 | 2007-03-01 | Murray Michael C | Static dissipating resin compositions, methods for manufacture and articles made therefrom |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106009582A (en) * | 2016-05-24 | 2016-10-12 | 深圳市富恒新材料股份有限公司 | Transparent PC composite and preparation method thereof |
| CN106589880A (en) * | 2016-11-16 | 2017-04-26 | 上海长伟锦磁工程塑料有限公司 | Transparent low-temperature-resistant scuffing-resistant polycarbonate composite material |
| CN109627728A (en) * | 2018-11-20 | 2019-04-16 | 上海长伟锦磁工程塑料有限公司 | A kind of transparent Weather resistant halogen-free flame retardant PC/PETG alloy material |
| CN110204879A (en) * | 2019-06-06 | 2019-09-06 | 广东圆融新材料有限公司 | Polycarbonate compositions and preparation method thereof |
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