CN112266596A - Conductive polycarbonate composite material and preparation method thereof - Google Patents
Conductive polycarbonate composite material and preparation method thereof Download PDFInfo
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- CN112266596A CN112266596A CN202011108425.6A CN202011108425A CN112266596A CN 112266596 A CN112266596 A CN 112266596A CN 202011108425 A CN202011108425 A CN 202011108425A CN 112266596 A CN112266596 A CN 112266596A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention relates to a conductive polycarbonate composite material, which comprises 91-94 parts by weight of a polycarbonate nozzle crushing material; 3-5 parts of a super-conductive carbon nano tube, 1-3 parts of an aliphatic ester multifunctional dispersant and 1-3 parts of diffusion oil. The invention effectively utilizes the polycarbonate nozzle material, utilizes the superconducting carbon nano tube and the aliphatic ester multifunctional dispersant in certain parts by weight, ensures that the prepared composite material has good conductivity, is suitable for continuous production, has low production cost, provides more possibility for recycling the polycarbonate nozzle material and reduces the waste of resources.
Description
Technical Field
The invention relates to the technical field of conductive high polymer material technology and injection molding nozzle material recycling, in particular to a conductive polycarbonate composite material, a preparation method and a coating disc prepared from the conductive polycarbonate composite material.
Background
Polycarbonate is widely applied in the optical and electronic industry, so a large amount of water gap materials are generated, the direct recycling is limited due to the specific requirements of the electronic industry on antistatic property at present, the economic value of the water gap materials cannot be fully recycled, and therefore, how to recycle and fully utilize the polycarbonate water gap materials is a subject which is beneficial to the nation and people after the regeneration is promoted by a scientific method to generate new economic benefits and produce high-quality products.
And the existing conductive polycarbonate composite material has complex preparation method and high preparation cost. In addition, the conductive filler is utilized in the existing preparation method, so that the conductive filler is agglomerated, and the mechanical property, the conductive effect and the like of the composite material are influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a conductive polycarbonate composite material and a preparation method thereof, wherein the preparation method is simple, the water gap material can be effectively utilized, and the production cost of the conductive polycarbonate composite material is reduced.
In order to achieve the purpose, the invention adopts the technical scheme that:
the conductive polycarbonate composite material comprises 91-94 parts by weight of polycarbonate nozzle crushing material; 3-5 parts of a super-conductive carbon nano tube, 1-3 parts of an aliphatic ester multifunctional dispersant and 1-3 parts of diffusion oil.
A method of preparing a conductive polycarbonate composite, comprising:
collecting a polycarbonate nozzle material, wherein the polycarbonate nozzle material is a nozzle stub bar generated by preparing an optical electronic injection molding part from the polycarbonate material; crushing the polycarbonate nozzle material after dedusting to obtain a polycarbonate nozzle crushed material;
and 4, feeding the uniformly mixed raw materials into an extruder, carrying out melt extrusion, cooling by an air cooling tank, granulating and drying to obtain the conductive polycarbonate composite material.
The particle size of the polycarbonate nozzle crushed material prepared in the step 1 is less than or equal to 8 mm.
In the step 1, the crushed polycarbonate nozzle crushed material is baked for 1 to 2 hours at the temperature of between 100 and 120 ℃ in a hot air mode.
An electronic product packaging tray is prepared from the conductive polycarbonate composite material.
After the scheme is adopted, the preparation method is simple, and the production cost is low: the invention selects the polycarbonate nozzle crushing material as a base material, simultaneously selects the super-conductive carbon nano tube as a conductive filler, uses the aliphatic ester multifunctional dispersant, and has strong affinity and compatibility of polymer long chains in macromolecules of the aliphatic ester multifunctional dispersant to polycarbonate high polymer materials, so that the processing performance of the composite material is greatly improved without influencing the physical performance. Because the aliphatic ester multifunctional dispersant has excellent dispersion effect on the superconducting carbon nano tube, the superconducting carbon nano tube can be fully dispersed, and a complete conductive network is formed on the surface of a product, so that the composite material has good conductivity. The surface resistance can reach 10 percent when the addition proportion of the conductive carbon nano tube is 4 percent5Omega/□, and the composite material can keep better mechanical property. Moreover, the invention is suitable for continuous production, has low production cost, provides more possibility for recycling the polycarbonate nozzle material and reduces the waste of resources.
In addition, the composite material also has higher fluidity and dimensional stability, low warpage, higher thermal deformation temperature and long-acting antistatic property, is suitable for continuously produced injection molded parts, and is particularly suitable for packaging trays in the electronic industry.
Drawings
FIG. 1 is a graph of test results for various embodiments of the composite material of the present invention;
FIG. 2 is a graph showing the analysis of the composite additive and the surface resistance according to the present invention.
Detailed Description
The invention discloses a conductive polycarbonate composite material, which comprises 91-94 parts by weight of a polycarbonate nozzle crushing material; 3-5 parts of a super-conductive carbon nano tube, 1-3 parts of an aliphatic ester multifunctional dispersant and 1-3 parts of diffusion oil.
The preparation method of the conductive polycarbonate composite material comprises the following specific steps:
collecting a polycarbonate nozzle material, wherein the polycarbonate nozzle material is a nozzle stub bar generated by preparing an optical electronic injection molding part from the polycarbonate material; feeding the polycarbonate powder into a pulverizer for pulverization after dust removal by using an air gun to obtain particles with the particle size of less than or equal to 8mm, namely the polycarbonate pulverized material;
baking the prepared polycarbonate crushed material for 1-2 hours at 100-120 ℃ by using a hot air circulating oven.
And 2, weighing the polycarbonate nozzle crushing material prepared in the step 1, the superconducting carbon nano tube, the aliphatic ester multifunctional dispersing agent and the diffusion oil according to the parts by weight.
And 3, putting the weighed raw materials into a vertical barrel type stainless steel container stirrer, and stirring for 20-30 minutes at the rotating speed of the stirrer of 300/minute to uniformly mix the raw materials.
And 4, feeding the uniformly mixed raw materials into an extruder for melt extrusion, wherein the extruder is a double-screw extruder, the temperature of the double-screw extruder is 180-240 ℃, the rotating speed of a screw is 400RPM, and the obtained melt is extruded by the double-screw extruder, cooled by an air cooling tank, granulated and dried to obtain the conductive polycarbonate composite material.
In order to make the above-mentioned details exhaustive, specific examples are set forth below.
Example 1
This example was prepared as a comparative example by using only 100 parts by weight of a polycarbonate nozzle crumble through an extruder.
Example 2
In the embodiment, the formula of the conductive polycarbonate composite material comprises the following components in parts by weight: 94 parts of polycarbonate nozzle crushing material, 3 parts of superconducting Carbon Nano Tube (CNT), 1 part of aliphatic ester multifunctional dispersant and 2 parts of diffusion oil.
Example 3
The formula of the conductive polycarbonate composite material in parts by weight is as follows: 93 parts of polycarbonate nozzle crushing material, 4 parts of superconducting Carbon Nano Tube (CNT), 1 part of aliphatic ester multifunctional dispersant and 2 parts of diffusion oil.
Example 4
The formula of the conductive polycarbonate composite material in parts by weight is as follows: 92 parts of polycarbonate nozzle crushing material, 5 parts of superconducting Carbon Nano Tube (CNT), 1 part of aliphatic ester multifunctional dispersant and 2 parts of diffusion oil.
Example 5
The formula of the conductive polycarbonate composite material in parts by weight is as follows: 91 parts of polycarbonate nozzle crushing material, 5 parts of superconducting Carbon Nano Tube (CNT), 2 parts of aliphatic ester multifunctional dispersant and 2 parts of diffusion oil.
Example 6
The formula of the conductive polycarbonate composite material in parts by weight is as follows: 91 parts of polycarbonate nozzle crushing material, 4 parts of superconducting Carbon Nano Tube (CNT), 2 parts of aliphatic ester multifunctional dispersant and 2 parts of diffusion oil.
Based on the conductive polycarbonate composite materials obtained in the above examples 2 to 6, the elongation at break, the melt flow rate, the heat distortion temperature, the plane warpage, the molding shrinkage, and the surface resistance of the injection-molded part after baking at 100 ℃ for 1H were measured. The measurement results are shown in fig. 1.
According to the invention, the super-conductive carbon nano tube is selected as a conductive filler, the aliphatic ester multifunctional dispersing agent is used, and the polymer long chain in the macromolecule of the aliphatic ester multifunctional dispersing agent has strong affinity and compatibility with the polycarbonate high polymer material, so that the processing performance of the composite material is greatly improved, and the physical performance is not influenced. Because the aliphatic ester multifunctional dispersant has excellent dispersion function on the superconducting carbon nano tube, the superconducting carbon nano tube can be fully dispersed, and a complete conductive network is formed on the surface of a product. It can be seen by continuing to combine table 1 that the conductive polycarbonate composite material prepared by the method has a significant improvement in conductivity, and when the amount of CNT added is 5% and the amount of the aliphatic ester multifunctional dispersant added is 1%, the surface resistance can be 105Omega/□; when CNThe addition of T is 4-5%, and when 2% of aliphatic ester multifunctional dispersant is added, the surface resistance can be 104Ω/□。
Referring to fig. 2 and fig. 1, it can be seen that the multifunctional aliphatic ester dispersant has a significant effect on the dispersion of the conductive filler in the polycarbonate matrix, because the multifunctional aliphatic ester dispersant has a good affinity for conductive media such as conductive carbon nanotubes, and can perform good dispersion, coupling, activation, and agglomeration prevention effects, so that the multifunctional aliphatic ester dispersant is more uniformly dispersed in the polymer, the surface volume resistance of the material is greatly reduced, the processability is greatly improved, and the physical properties are not affected. After the treatment of the technical scheme, the conductive filler can be uniformly distributed in the polycarbonate matrix, the agglomeration phenomenon of the carbon nano tubes is avoided, and finally, the surface of the injection molding product is provided with a large amount of conductive substances to form a perfect conductive network, so that the purpose of long-term, high-efficiency, conductive and antistatic performance of the injection molding product is achieved.
Based on the same inventive concept, the invention also discloses an electronic product packaging tray which is prepared by adopting the conductive polycarbonate composite material. The method comprises the following specific steps:
adding the conductive polycarbonate composite material into a drying barrel, setting the temperature of a dehumidifying dryer to be 110 +/-5 ℃, setting the dehumidifying and drying time to be more than or equal to 2 hours, and setting the water content of the material to be less than or equal to 0.002%;
adding the dehumidified and dried conductive polycarbonate composite material into a hopper of an injection molding machine, assisting a mold temperature machine, a manipulator and an injection mold of a loaded electronic product packaging disc, and performing injection molding processing molding, wherein the mold temperature is set to be 100 ℃, the actual mold temperature is maintained at 90 +/-5 ℃, the injection molding machine is an electric injection molding machine with the mold locking force of 150 tons in the department of Nocardiaceae, and the injection molding temperature is 270-300 ℃; the injection speed is 75-115mm/s, the injection pressure is 400-; and preparing the polymer long-acting antistatic packaging tray according to the technical conditions, and then inspecting, packaging and warehousing.
In conclusion, the preparation method of the conductive polycarbonate composite material is suitable for continuous production, has low production cost, and can be used for preparing polycarbonate nozzle materialsUtilization provides more possibilities and reduces waste of resources. Meanwhile, the preparation process of the conductive polycarbonate composite material is fully simplified, and the preparation cost of the material is greatly saved. In the composite processing process of the conductive filler, the conductive filler is uniformly distributed, the adding proportion of the conductive carbon nano tube is 4 percent, and the surface resistance can reach 10 percent5Omega/□, and the composite material can keep better mechanical property. In addition, the composite material also has higher fluidity and dimensional stability, low warping property, higher thermal deformation temperature and long-acting antistatic property, is suitable for continuously produced injection molding parts, and is particularly suitable for packaging trays in the electronic industry.
The above description is only exemplary of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above exemplary embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (4)
1. An electrically conductive polycarbonate composite, characterized in that: the composite material comprises 91-94 parts by weight of polycarbonate nozzle crushing material; 3-5 parts of a super-conductive carbon nano tube, 1-3 parts of an aliphatic ester multifunctional dispersant and 1-3 parts of diffusion oil.
2. A preparation method of a conductive polycarbonate composite material is characterized by comprising the following steps: the method comprises the following steps:
step 1, preparing a polycarbonate nozzle crushing material;
collecting a polycarbonate nozzle material, wherein the polycarbonate nozzle material is a nozzle stub bar generated by preparing an optical electronic injection molding part from the polycarbonate material; crushing the polycarbonate nozzle material after dedusting to obtain a polycarbonate nozzle crushed material;
step 2, weighing the polycarbonate nozzle crushing material prepared in the step 1, the superconducting carbon nanotube, the aliphatic ester multifunctional dispersant and the diffusion oil according to the parts by weight;
step 3, stirring the weighed raw materials to uniformly mix the raw materials;
and 4, feeding the uniformly mixed raw materials into an extruder, carrying out melt extrusion, cooling by an air cooling tank, granulating and drying to obtain the conductive polycarbonate composite material.
3. The method for preparing a conductive polycarbonate composite material according to claim 3, wherein the method comprises the following steps: the particle size of the polycarbonate nozzle crushed material prepared in the step 1 is less than or equal to 8 mm.
4. The method for preparing a conductive polycarbonate composite material according to claim 3, wherein the method comprises the following steps: in the step 1, the crushed polycarbonate nozzle crushed material is baked for 1 to 2 hours at the temperature of between 100 and 120 ℃ in a hot air mode.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115558A (en) * | 2010-12-29 | 2011-07-06 | 四川大学 | High-conductivity polymer carbon nanotube composite material and micro-processing method thereof |
| CN102675720A (en) * | 2012-05-25 | 2012-09-19 | 东莞市德诚塑化科技有限公司 | Macromolecule conductive master batches |
| CN102757633A (en) * | 2012-07-03 | 2012-10-31 | 金发科技股份有限公司 | PC (poly carbonate) composite material, as well as preparation method and applications thereof and plastic product |
| US20140001415A1 (en) * | 2010-12-29 | 2014-01-02 | University Of Bradford | Methods to Improve the Electrical Conductivity for Moulded Plastic Parts |
| CN106147184A (en) * | 2015-04-14 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | Low content CNT Merlon composite anti-static masterbatch and preparation method thereof |
| CN111748188A (en) * | 2019-03-28 | 2020-10-09 | 合肥杰事杰新材料股份有限公司 | Ultrahigh-conductivity nano carbon master batch and preparation method and application thereof |
-
2020
- 2020-10-16 CN CN202011108425.6A patent/CN112266596A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115558A (en) * | 2010-12-29 | 2011-07-06 | 四川大学 | High-conductivity polymer carbon nanotube composite material and micro-processing method thereof |
| US20140001415A1 (en) * | 2010-12-29 | 2014-01-02 | University Of Bradford | Methods to Improve the Electrical Conductivity for Moulded Plastic Parts |
| CN102675720A (en) * | 2012-05-25 | 2012-09-19 | 东莞市德诚塑化科技有限公司 | Macromolecule conductive master batches |
| CN102757633A (en) * | 2012-07-03 | 2012-10-31 | 金发科技股份有限公司 | PC (poly carbonate) composite material, as well as preparation method and applications thereof and plastic product |
| CN106147184A (en) * | 2015-04-14 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | Low content CNT Merlon composite anti-static masterbatch and preparation method thereof |
| CN111748188A (en) * | 2019-03-28 | 2020-10-09 | 合肥杰事杰新材料股份有限公司 | Ultrahigh-conductivity nano carbon master batch and preparation method and application thereof |
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