CN112662077B - Antistatic graphene-coated aluminum microsphere modified PP composite material and preparation method thereof - Google Patents
Antistatic graphene-coated aluminum microsphere modified PP composite material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an antistatic PP composite material, in particular to an antistatic graphene-coated aluminum microsphere modified PP composite material and a preparation method thereof. The antistatic graphene-coated aluminum microsphere modified PP composite material is prepared from the following raw materials in parts by weight: 55-75 parts of PP, 10-20 parts of talcum powder, 5-20 parts of conductive powder, 2-8 parts of coupling agent, 0.5-1.5 parts of lubricant and 0.3-1.0 part of antioxidant, wherein the conductive powder is a conductive mixture of graphene coated aluminum microspheres prepared by a typical molecular mixing method. The graphene-coated aluminum microsphere prepared by a typical molecular mixing method is used as conductive powder, and a small amount of conductive powder is added, so that the conductive powder has high conductivity. Meanwhile, a small amount of talcum powder is selected as a blend, so that the tensile strength, the impact strength and the thermal deformation temperature of the composite material can be improved, and finally, the novel PP composite material with excellent mechanical property and antistatic effect is prepared.
Description
Technical Field
The invention relates to an antistatic PP composite material, in particular to an antistatic graphene-coated aluminum microsphere modified PP composite material and a preparation method thereof.
Background
With the development of science and technology, the material industry is rapidly developed, and the requirements on the performance of antistatic materials are higher and higher. Because the electrical property of the polymer material is obviously superior to that of other materials, the antistatic polymer material is favored, and polypropylene is a thermoplastic resin obtained by propylene polymerization, which is called PP for short. PP is a crystalline high polymer and has the characteristics of light weight, low price, no toxicity, no odor and the like. The PP material has the following advantages: (1) the relative density is small, only 0.89-0.91, and is one of the lightest plastics. (2) the mechanical property is good, the strength, the hardness and the rigidity are high, the bending resistance is realized, and the forming processing performance is good; (3) high thermal stability and chemical stability, high decomposition temperature up to 300 deg.c, and high stability to other chemical reagents except being corroded by concentrated sulfuric acid and concentrated nitric acid. The advantages of the PP material enable the PP material to be widely developed and applied in a plurality of fields such as machinery, automobiles, electronic appliances, buildings, textile clothes, packaging and the like, but the PP material is not good in electrical conductivity, so that the antistatic effect is not ideal.
The relevant patents also propose solutions with respect to the preparation of antistatic PP composites. For example, patent CN201310254831 discloses a polypropylene conductive plastic and a preparation method thereof, wherein 30-40 parts of carbon black and 10-20 parts of aluminum powder are added to achieve a conductive effect, but mechanical properties of a composite material are greatly reduced due to excessive conductive fillers.
For example, patent CN201410195927 discloses a conductive polypropylene and a preparation method thereof, wherein the conductivity of the composite material is improved by adding more than 20 parts of conductive carbon black, and although the conductivity is improved, the cost of the composite material is high because the price of the conductive carbon black is high. In addition, the poor dispersibility of the conductive carbon black reduces the mechanical properties of the composite material.
For example, patent CN201510862583.3 discloses an antistatic PP composite material and a preparation method thereof, wherein the antistatic, processing and impact resistance of the modified material are improved by adding 5-15 parts of antistatic agent, 5-15 parts of POE resin and 0.05-0.15 part of PETS. Wherein the antistatic agent is a mixture of carbon black with the particle size of 10-50 nm and carbon fiber with the monofilament diameter of 50-100 nm in a weight ratio of 1.4-2.2: 1. However, the antistatic effect of the antistatic PP composite material is not ideal enough, and the application range of the material is limited due to insufficient strength.
Therefore, the development of the antistatic PP composite material which has good conductivity and good dispersibility and ensures the mechanical strength has important theoretical research value and practical application prospect.
Disclosure of Invention
The invention aims to avoid the defects in the prior art and provide the antistatic PP composite material, which can remarkably improve the antistatic property of the material on the premise of keeping the characteristics of high strength, high thermal deformation temperature, good dimensional stability and good processability of the material.
The purpose of the invention is realized by the following technical scheme:
the invention provides an antistatic graphene-coated aluminum microsphere modified PP composite material which is characterized by comprising the following components in parts by weight: PP: 55-75 parts, talcum powder: 10-20 parts of conductive powder: 5-20 parts of a coupling agent: 2-8 parts of a lubricant: 0.5-1.5 parts of antioxidant: 0.3-1.0 part;
the conductive powder is a conductive mixture of graphene coated aluminum microspheres prepared by a typical molecular mixing method.
Further, the mass fraction of aluminum in the conductive powder is 5-15%.
Further, the preparation method of the conductive powder comprises the following steps:
graphene pretreatment: dispersing graphene powder in water, and then carrying out ultrasonic treatment on the water solution for 60-120 minutes to obtain graphene sol;
the preparation method of the conductive powder comprises the following steps: aluminum acetate was dispersed in ammonia (analytical grade) to give an aluminum hydroxide sol. And adding the graphene sol obtained in the graphene pretreatment step into the sol, and treating for 30-60 minutes under ultrasonic. Stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 100-120 ℃, evaporating to obtain mixed powder, continuously drying for 12-15 hours at 150-250 ℃, and carrying out heat treatment (at the temperature of 200-250 ℃) on the mixed powder for reduction in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fractions of aluminum are 5%, 10% and 15%, respectively.
Furthermore, the graphene is preferably high-conductivity graphene, and preferably at least one of Nanjing Xifeng nanometer XF001H, Ningbo West science and technology G-Powder, Heizhou hexahydric element SE1231 and Suzhou Grey Feng nanometer GRF-H-FLGA-01.
Further, the PP is at least one of polypropylene copolymer and polypropylene, and the density is 0.90-0.94 g/cm3The melting point is 165-170 ℃; the PP at the density and the melting point has excellent dielectric property, heat resistance, wear resistance and dimensional stability.
Further, the coupling agent is any one or combination of two of titanate coupling agent and silane coupling agent.
Further, the lubricant is at least one of N, N-methylene bis stearamide, polyethylene wax and zinc stearate.
Further, the antioxidant is a compound antioxidant consisting of hindered phenol antioxidant 1010 and phosphite antioxidant 168 according to the weight ratio of 1-1.5: 1.
The invention also provides a preparation method of the antistatic graphene-coated aluminum microsphere modified PP composite material, which comprises the following steps:
(1) weighing PP, talcum powder, conductive powder, a coupling agent, a lubricant and an antioxidant according to the proportion, uniformly mixing, then putting into a high-speed mixer, and stirring for 30-60 minutes, wherein the state of the material can be observed, and the change of physical form can not occur in the material stirring process;
(2) adding the mixed material obtained in the step (1) into a double-screw extruder for extrusion and granulation;
(3) and drying the produced particles by a blast dryer to obtain the antistatic PP composite material.
Further, in the step (2), the specific process parameters of the twin-screw extruder are as follows: the temperature of the first zone is 155-170 ℃, the temperature of the second zone is 175-185 ℃, the temperature of the third zone is 195-205 ℃, the temperature of the fourth zone is 210-225 ℃, the temperature of the fifth zone is 195-205 ℃ and the temperature of the sixth zone is 195-205 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the preparation method, the conductive powder of the graphene coated aluminum microspheres is prepared by adopting aluminum and graphene and a typical molecular level mixing method (MLM), so that the agglomeration probability of graphene and aluminum particles in the powder mixing process is reduced, and the conductive capacity and the antistatic effect of PP are effectively improved; and the talcum powder and the coupling agent in a specific ratio are combined, so that the PP has excellent mechanical property while having antistatic property.
(2) According to the invention, the PP is modified by adopting the conductive powder of the graphene-coated aluminum microspheres, and compared with the existing PP modified by graphene or metal particles, the dispersibility and compatibility are greatly improved. Meanwhile, due to the dual functions of the graphene and the aluminum particles, the resistivity of the modified PP is reduced, the modified PP has an excellent antistatic effect, and the modified PP becomes a novel antistatic PP material.
(3) According to the invention, the talcum powder and the coupling agent in a specific ratio are combined, so that the modified PP has the characteristics of good mechanical properties such as heat resistance, wear resistance and dimensional stability and low cost while having antistatic property.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic flow chart of a preparation method of an antistatic graphene-coated aluminum microsphere modified PP composite material.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of protection of the present invention.
Example 1
The embodiment provides an antistatic graphene-coated aluminum microsphere modified PP composite material, which comprises the following raw materials in parts by weight: PP: 55 parts of (1); talc powder: 25 parts of (1); conductive powder: 20 parts of (1); coupling agent: 8 parts of a mixture; lubricant: 1.5 parts; antioxidant: 1.0 part.
The conductive powder is a mixed powder prepared by preparing graphene coated aluminum microspheres by a typical molecular mixing method, and the mass fraction of aluminum is 10%.
Further, the preparation method of the conductive powder is as follows: graphene pretreatment: taking graphene powder, dispersing the graphene powder in water, and then carrying out ultrasonic treatment on the aqueous solution for 120 minutes to obtain graphene sol;
preparing conductive powder of graphene coated aluminum microspheres: dispersing aluminum acetate into ammonia water (analytically pure) to obtain aluminum hydroxide sol; adding the graphene sol obtained in the step (1) into the sol, and treating for 30 minutes under ultrasonic; stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 100 ℃, evaporating to obtain mixed powder, continuously drying for 12 hours at the temperature of 150 ℃, and carrying out heat treatment (at the temperature of 200 ℃) on the mixed powder to reduce the mixed powder in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fraction of aluminum is 10 percent respectively.
The PP has a density of 0.91g/cm3And a melting point of 165 ℃.
The coupling agent is a mixture of a titanate coupling agent and a silane coupling agent in a weight ratio of 1: 1.
The lubricant is Malaysia EBS-SF lubricant.
The antioxidant is a compound antioxidant consisting of an antioxidant 1010 and an antioxidant 168 according to the weight ratio of 1.5:1, and both are produced by BASF corporation.
The embodiment also provides a preparation method of the antistatic material of the graphene-coated aluminum microsphere modified PP, which comprises the following steps:
(1) weighing PP and other raw materials according to the proportion, mixing, and then putting into a high-speed mixer to stir for 30 minutes;
(2) adding the mixed material into a double-screw extruder for extrusion and granulation; the specific technological parameters of the double-screw extruder are as follows: the temperature of the first zone is 165 ℃, the temperature of the second zone is 175 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 210 ℃, the temperature of the fifth zone is 195 ℃ and the temperature of the sixth zone is 195 ℃;
(3) and drying the produced particles by a blast dryer to obtain the antistatic graphene coated aluminum microsphere modified PP composite material.
Example 2
The embodiment provides an antistatic material of graphene-coated aluminum microsphere modified PP, which comprises the following raw materials in parts by weight: PP: 65 parts of (1); talc powder: 20 parts of (1); conductive powder: 15 parts of (1); coupling agent: 6 parts of (1); lubricant: 1.2 parts; antioxidant: 0.8 part.
The conductive powder is a mixed powder prepared by preparing graphene coated aluminum microspheres by a typical molecular mixing method, and the mass fraction of aluminum is 10%.
Further, the preparation method of the conductive powder is as follows: graphene pretreatment: taking graphene powder, dispersing the graphene powder in water, and then carrying out ultrasonic treatment on the aqueous solution for 120 minutes to obtain graphene sol;
preparing conductive powder of graphene coated aluminum microspheres: dispersing aluminum acetate into ammonia water (analytically pure) to obtain aluminum hydroxide sol; adding the graphene sol obtained in the step (1) into the sol, and treating for 60 minutes under ultrasonic; stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 120 ℃, evaporating to obtain mixed powder, continuously drying for 15 hours at 250 ℃, and carrying out heat treatment (at the temperature of 250 ℃) on the mixed powder for reduction in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fraction of aluminum is 10 percent respectively.
The PP has a density of 0.91g/cm3And a melting point of 165 ℃.
The coupling agent is a mixture of a titanate coupling agent and a silane coupling agent in a weight ratio of 1: 1.
The lubricant is Malaysia EBS-SF lubricant.
The antioxidant is a compound antioxidant consisting of an antioxidant 1010 and an antioxidant 168 according to the weight ratio of 1.5:1, and both are produced by BASF corporation.
The embodiment also provides a preparation method of the antistatic material of the graphene-coated aluminum microsphere modified PP, which comprises the following steps:
(1) weighing PP and other raw materials according to the proportion, mixing, and then putting into a high-speed mixer to stir for 30 minutes;
(2) adding the mixed material into a double-screw extruder for extrusion and granulation; the specific technological parameters of the double-screw extruder are as follows: the temperature of the first zone is 165 ℃, the temperature of the second zone is 175 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 210 ℃, the temperature of the fifth zone is 195 ℃ and the temperature of the sixth zone is 195 ℃;
(3) and drying the produced particles by a blast dryer to obtain the antistatic graphene coated aluminum microsphere modified PP composite material.
Example 3
The embodiment provides an antistatic material of graphene-coated aluminum microsphere modified PP, which comprises the following raw materials in parts by weight: PP: 70 parts of (B); talc powder: 16 parts of a mixture; conductive powder: 14 parts of (1); coupling agent: 5 parts of a mixture; lubricant: 0.9 part; antioxidant: 0.6 part.
The conductive powder is a mixed powder prepared by preparing graphene coated aluminum microspheres by a typical molecular mixing method, and the mass fraction of aluminum is 10%.
Further, the preparation method of the conductive powder is as follows: graphene pretreatment: taking graphene powder, dispersing the graphene powder in water, and then carrying out ultrasonic treatment on the aqueous solution for 120 minutes to obtain graphene sol;
preparing conductive powder of graphene coated aluminum microspheres: dispersing aluminum acetate into ammonia water (analytically pure) to obtain aluminum hydroxide sol; and (2) adding the graphene sol obtained in the step (1) into the sol, and treating for 50 minutes under ultrasonic. Stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 120 ℃, evaporating to obtain mixed powder, continuously drying for 15 hours at 210 ℃, and carrying out heat treatment (at the temperature of 240 ℃) reduction on the mixed powder in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fraction of aluminum is 10 percent respectively.
The PP has a density of 0.91g/cm3And a melting point of 165 ℃.
The coupling agent is a mixture of a titanate coupling agent and a silane coupling agent in a weight ratio of 1: 1.
The lubricant is Malaysia EBS-SF lubricant.
The antioxidant is a compound antioxidant consisting of an antioxidant 1010 and an antioxidant 168 according to the weight ratio of 1.5:1, and both are produced by BASF corporation.
The embodiment also provides a preparation method of the antistatic material of the graphene-coated aluminum microsphere modified PP, which comprises the following steps:
(1) weighing PP and other raw materials according to the proportion, mixing, and then putting into a high-speed mixer to stir for 30 minutes;
(2) adding the mixed material into a double-screw extruder for extrusion and granulation; the specific technological parameters of the double-screw extruder are as follows: the temperature of the first zone is 165 ℃, the temperature of the second zone is 175 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 210 ℃, the temperature of the fifth zone is 195 ℃ and the temperature of the sixth zone is 195 ℃;
(3) and drying the produced particles by a blast dryer to obtain the antistatic graphene coated aluminum microsphere modified PP composite material.
Example 4
The embodiment provides an antistatic material of graphene-coated aluminum microsphere modified PP, which comprises the following raw materials in parts by weight: PP: 80 parts of a mixture; talc powder: 10 parts of (A); conductive powder: 10 parts of (A); coupling agent: 2 parts of (1); lubricant: 0.5 part; antioxidant: 0.3 part.
The conductive powder is a mixed powder prepared by preparing graphene coated aluminum microspheres by a typical molecular mixing method, and the mass fraction of aluminum is 10%.
Further, the preparation method of the conductive powder is as follows: graphene pretreatment: taking graphene powder, dispersing the graphene powder in water, and then carrying out ultrasonic treatment on the aqueous solution for 100 minutes to obtain graphene sol;
preparing conductive powder of graphene coated aluminum microspheres: dispersing aluminum acetate into ammonia water (analytically pure) to obtain aluminum hydroxide sol; adding the graphene sol obtained in the step (1) into the sol, and treating for 40 minutes under ultrasonic; stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 110 ℃, evaporating to obtain mixed powder, continuously drying for 13 hours at the temperature of 200 ℃, and carrying out heat treatment (at the temperature of 220 ℃) on the mixed powder for reduction in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fraction of aluminum is 10 percent respectively.
The PP has a density of 0.91g/cm3And a melting point of 165 ℃.
The coupling agent is a mixture of a titanate coupling agent and a silane coupling agent in a weight ratio of 1: 1.
The lubricant is Malaysia EBS-SF lubricant.
The antioxidant is a compound antioxidant consisting of an antioxidant 1010 and an antioxidant 168 according to the weight ratio of 1.5:1, and both are produced by BASF corporation.
The embodiment also provides a preparation method of the antistatic material of the graphene-coated aluminum microsphere modified PP, which comprises the following steps:
(1) weighing PP and other raw materials according to the proportion, mixing, and then putting into a high-speed mixer to stir for 30 minutes;
(2) adding the mixed material into a double-screw extruder for extrusion and granulation; the specific technological parameters of the double-screw extruder are as follows: the temperature of the first zone is 165 ℃, the temperature of the second zone is 175 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 210 ℃, the temperature of the fifth zone is 195 ℃ and the temperature of the sixth zone is 195 ℃;
(3) and drying the produced particles by a blast dryer to obtain the antistatic graphene coated aluminum microsphere modified PP composite material.
Comparative example 1
Comparative example 1 was prepared in substantially the same manner as in example 3, except that the raw materials other than PP were not added, but PP in the same weight parts was replaced.
Comparative example 2
The formulation of the raw materials and the preparation method used in comparative example 2 are substantially the same as those used in example 3, except that no talc is added, but PP is replaced with the same parts by weight.
Comparative example 3
The formulation of the raw materials and the preparation method used in comparative example 3 were substantially the same as those of example 3 except that no conductive powder was added, and PP was substituted in the same weight parts.
Comparative example 4
Comparative example 4 the formulation of the raw materials and the preparation method used are substantially the same as those of example 3, except that no coupling agent is added, but PP in the same parts by weight is substituted.
Comparative example 5
The formula and preparation method of the raw materials used in comparative example 5 are substantially the same as those in example 3, except that the conductive powder added is a mixed powder in which aluminum accounts for 5% by mass.
Comparative example 6
The formulation and preparation method of the raw materials used in comparative example 6 were substantially the same as those of example 3, except that the conductive powder added was a mixed powder containing 15% by mass of aluminum.
Comparative example 7
The formulation of the raw materials used in comparative example 7 was substantially identical to that of example 3, except that the conductive powder added was not prepared by a typical molecular mixing method, but was sequentially mixed with the remaining raw materials, extruded, and pelletized.
Table 1 summarizes the raw material formulations (parts) of examples 1-4 as follows:
TABLE 1 raw material formulation (parts) of examples 1 to 4
Examples of the experiments
Subject: the antistatic modified PP materials prepared in the examples 1 to 4 and the comparative examples 1 to 7 are prepared into sample strips according to the national standard by using injection molding process equipment (FH-100 type injection molding machine), and then the sample strips are subjected to related performance test.
The experimental standard is as follows: surface resistivity was measured according to ASTM-D257; tensile properties were tested according to ISO-527-2, with a specimen size of 150 x 10 x 4mm and a tensile speed of 50 mm/min; the bending strength was carried out according to ISO-178, with a specimen size of 80 x 10 x 4mm, a bending speed of 2mm/min and a span of 64 mm; the impact strength of the simply supported beam is tested according to the ISO-179 standard, the size of a sample is 80 x 6 x 4mm, and the depth of a notch is one third of the thickness of the sample; heat distortion temperature was carried out according to ISO-75, with a specimen size of 120X 10X 3mm and a load of 1.8 MPa. The test results are shown in table 2.
TABLE 2 antistatic Properties and mechanical Properties of the antistatic modified PP of each of the examples and comparative examples
Table 2 compares the performance tests of examples 1 to 4 and comparative examples 1 to 7.
The analysis in table 2 shows that the conductive powder modified PP with the graphene coated aluminum microspheres prepared by the typical molecular mixing method can significantly reduce the surface resistivity of the PP material, so that the modified PP has good antistatic ability. In addition, after a small amount of talcum powder is added, the tensile strength, the impact strength and the heat distortion temperature of the modified PP are improved. More importantly, in the conductive powder prepared by the molecular-level mixing method, the dispersed aluminum microspheres are coated by graphene, so that the conductive particle aluminum microspheres are uniformly dispersed; after the conductive powder is mixed with PP, the graphene is dispersed more uniformly under the synergistic action of the coupling agent. Therefore, the conductive capacity of the modified PP is effectively improved under the combined action of the graphene and the aluminum microspheres, and meanwhile, the mechanical property and the heat resistance of the modified PP are ensured due to the addition of the talcum powder, so that the modified PP becomes a novel antistatic material.
The above experimental data are all obtained by the standard test, and the average value is obtained by parallel three experiments.
The invention has the beneficial effects that: (1) according to the preparation method, the conductive powder of the graphene coated aluminum microspheres is prepared by adopting aluminum and graphene and a typical molecular level mixing method (MLM), so that the agglomeration probability of graphene and aluminum particles in the powder mixing process is reduced, and the conductive capacity and the antistatic effect of PP are effectively improved; and the talcum powder and the coupling agent in a specific ratio are combined, so that the PP has excellent mechanical property while having antistatic property.
(2) According to the invention, the PP is modified by adopting the conductive powder of the graphene-coated aluminum microspheres, and compared with the existing PP modified by graphene or metal particles, the dispersibility and compatibility are greatly improved. Meanwhile, due to the dual functions of the graphene and the aluminum particles, the resistivity of the modified PP is reduced, the modified PP has an excellent antistatic effect, and the modified PP becomes a novel antistatic PP material.
(3) According to the invention, the talcum powder and the coupling agent in a specific ratio are combined, so that the modified PP has the characteristics of good mechanical properties such as heat resistance, wear resistance and dimensional stability and low cost while having antistatic property.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides an antistatic type graphite alkene cladding aluminium microballon modified PP combined material which characterized in that: the PP composite material comprises the following components in parts by weight: PP: 55-75 parts, talcum powder: 10-20 parts of conductive powder: 5-20 parts of a coupling agent: 2-8 parts of a lubricant: 0.5-1.5 parts of antioxidant: 0.3-1.0 part;
the conductive powder is a conductive mixture of graphene coated aluminum microspheres prepared by a typical molecular level mixing method;
the preparation method of the conductive powder comprises the following steps:
graphene pretreatment: dispersing graphene powder in water, and then carrying out ultrasonic treatment on the water solution for 60-120 minutes to obtain graphene sol;
the preparation method of the conductive powder comprises the following steps: dispersing aluminum acetate into ammonia water to obtain aluminum hydroxide sol, adding the graphene sol obtained in the graphene pretreatment step into the sol, treating for 30-60 minutes under ultrasonic waves, stirring the mixed solution by using a magnetic stirrer, simultaneously heating the mixed solution to 100-120 ℃, evaporating to dryness to obtain mixed powder, continuously drying for 12-15 hours at 150-250 ℃, and carrying out heat treatment reduction on the mixed powder in a hydrogen environment; and reducing to obtain the graphene-coated aluminum microspherical composite conductive powder, wherein the mass fractions of aluminum are 5%, 10% and 15%, respectively.
2. The antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in claim 1, wherein: the graphene preferably is graphene with a high conductive structure, and is at least one of Nanjing Xifeng nanometer XF001H, Ningbo ink West science and technology G-Powder and Heizhou element SE 1231.
3. The antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in claim 1, wherein: the PP is at least one of co-polypropylene and homo-polypropylene, and the density is 0.90-0.94 g/cm3The melting point is 165-170 ℃; the PP at the density and the melting point has excellent dielectric property, heat resistance, wear resistance and dimensional stability.
4. The antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in claim 1, wherein: the coupling agent is any one or the combination of two of titanate coupling agent and silane coupling agent.
5. The antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in claim 1, wherein: the lubricant is at least one of N, N-methylene bis stearamide, polyethylene wax and zinc stearate.
6. The antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in claim 1, wherein: the antioxidant is a compound antioxidant consisting of hindered phenol antioxidant 1010 and phosphite antioxidant 168 according to a weight ratio of 1-1.5: 1.
7. The preparation method of the antistatic type graphene-coated aluminum microsphere modified PP composite material as claimed in any one of claims 1 to 6, characterized in that: the preparation method comprises the following steps:
(1) weighing PP, talcum powder, conductive powder, a coupling agent, a lubricant and an antioxidant according to the proportion, uniformly mixing, then putting into a high-speed mixer, and stirring for 30-60 minutes, wherein the state of the material can be observed, and the change of physical form can not occur in the material stirring process;
(2) adding the mixed material obtained in the step (1) into a double-screw extruder for extrusion and granulation;
(3) and drying the produced particles by a blast drier to prepare the antistatic PP composite material.
8. The preparation method of the antistatic type graphene-coated aluminum microsphere modified PP composite material according to claim 7, wherein the preparation method comprises the following steps: in the step (2), the specific process parameters of the double-screw extruder are as follows: the temperature of the first zone is 155-170 ℃, the temperature of the second zone is 175-185 ℃, the temperature of the third zone is 195-205 ℃, the temperature of the fourth zone is 210-225 ℃, the temperature of the fifth zone is 195-205 ℃ and the temperature of the sixth zone is 195-205 ℃.
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| CN105602103A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | Graphene-containing antistatic polypropylene material and preparation method thereof |
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