CN113045818A - Preparation method of conductive composite material based on engineering plastic as carrier - Google Patents

Preparation method of conductive composite material based on engineering plastic as carrier Download PDF

Info

Publication number
CN113045818A
CN113045818A CN201911371528.9A CN201911371528A CN113045818A CN 113045818 A CN113045818 A CN 113045818A CN 201911371528 A CN201911371528 A CN 201911371528A CN 113045818 A CN113045818 A CN 113045818A
Authority
CN
China
Prior art keywords
composite material
conductive
fiber
carbon black
mixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911371528.9A
Other languages
Chinese (zh)
Inventor
董玉田
靳红根
张晓军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Rumo Technology Co ltd
Original Assignee
Hangzhou Rumo Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Rumo Technology Co ltd filed Critical Hangzhou Rumo Technology Co ltd
Priority to CN201911371528.9A priority Critical patent/CN113045818A/en
Publication of CN113045818A publication Critical patent/CN113045818A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • 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
    • 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
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • 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
    • C08K2201/002—Physical properties
    • C08K2201/004—Additives being defined by their length

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention discloses a preparation method of a conductive composite material based on engineering plastics as a carrier, which comprises the steps of firstly mixing conductive carbon black, nickel-plated carbon fiber and metal fiber at high speed by adopting a high-speed coulter type mixer with heating, and adding a coupling agent to improve the surface energy of the conductive carbon black, the nickel-plated carbon fiber and the metal fiber; adding polyethylene glycol 6000, continuously mixing, cooling, and crushing to obtain bonded particles with the length of 2-3 mm; and then adding the bonding particles and engineering plastics into a double-screw extruder for melt extrusion granulation to obtain the composite material with higher conductivity. The invention mainly solves the problems of small specific gravity of the carbon black filler, difficult charging and difficult uniform dispersion of the composite filler, and the process method not only improves the conductivity of the composite material, but also improves the mechanical property and the processing property of the composite material.

Description

Preparation method of conductive composite material based on engineering plastic as carrier
Technical Field
The invention relates to the technical field of conductive plastics, in particular to the technical field of a preparation method of a conductive composite material based on engineering plastics as a carrier.
Background
Composite materials are novel materials obtained by melting and mixing a filler and a polymer resin together, and are generally formed by combining two or more materials with different properties through some processing technologies and means; all components of the composite material are mutually cooperated to make up for deficiencies; composite materials have therefore continued to develop rapidly in recent years. The method is mainly applied to various fields of reinforced plastics, conductive plastics, heat-conducting plastics, electromagnetic shielding plastics and the like. In particular, conductive plastics have metal conductivity while maintaining the inherent processing characteristics of plastics, and have been used in many industries, particularly in the fields of manufacturing optical communication semiconductors, superconducting materials, integrated circuits, automotive electronics, and the like.
At present, two methods are mainly used for preparing conductive plastics, one method is to improve a molecular structure, namely preparing structural conductive plastics, and the other method is to prepare a conductive composite material by melting, mixing and granulating plastics and conductive fillers. Among them, the conductive plastics of the structured type have limited conductivity, and the conductive plastics of the filled type are widely used because of easy processing. With the progress of composite modification technology, the composite conductive plastic gradually replaces metal materials in many fields. Although the composite filling type conductive plastic is easy to mold, the conductive filler needs to be added in a large amount, particularly, the filler such as carbon black with excellent conductivity has small specific gravity and small bulk density, and the common extrusion granulation process is difficult to blank, so that the molding processing, the conductivity, the mechanical property and the like are reduced to a certain extent. In addition, factors influencing the conductivity of the conductive plastic include whether the filler forms a complete three-dimensional network structure in the plastic matrix, and the formation of the conductive network is influenced by the mixing process and is also the selection and collocation of the conductive filler. Therefore, in order to solve the technical problem of mixing and granulating the conductive plastic with high conductive filler content, the invention provides the following scheme: firstly, mixing conductive carbon black, nickel-plated carbon fiber and metal fiber at high speed by adopting a high-speed coulter type mixer with heating, and adding a coupling agent to improve the surface energy of the conductive carbon black, the nickel-plated carbon fiber and the metal fiber; adding polyethylene glycol 6000, continuously mixing, cooling, and crushing to obtain bonded particles with the length of 2-3 mm; and then adding the bonding particles and engineering plastics into a double-screw extruder for melt extrusion granulation to obtain the composite material with higher conductivity.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method with simple preparation process, good mixing effect and excellent conductivity, and the adopted technical scheme is as follows: the conductive composite material comprises conductive carbon black, nickel-plated carbon fiber, metal fiber and engineering plastic; the preparation process comprises the following steps: (1) and (3) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 20-50: 10-50, namely adding the raw materials into a high-speed coulter type mixer with heating, firstly mixing the raw materials at a high speed for 3-5 min, controlling the temperature of the mixer to be 80-100 ℃, then heating a silane coupling agent according to 0.5-2% of the total mass of the composite filler, continuously mixing the raw materials for 10-20 min, finally adding polyethylene glycol 6000, continuously mixing the raw materials for 5-10 min, cooling and crushing the mixture to obtain bonding particles with the length of 2-3 mm;
(2) and then adding the bonding particles and engineering plastics into a double-screw extruder according to the mass ratio of 30-60: 40-70 for melt extrusion granulation to obtain the composite material with higher conductivity.
Furthermore, in order to explain the technical method of the invention, the conductive carbon black is characterized in that the particle size of d50 is less than or equal to 10 μm, the length L = 3.5-5 mm of the nickel-plated carbon fiber, and the single diameter r is less than or equal to 20 μm; the metal fiber is any one of stainless steel fiber and aluminum fiber, the diameter r of the metal fiber is less than or equal to 50 mu m, and the length L of the metal fiber is less than or equal to 10 mm.
The technical scheme of the invention is further explained, which is characterized in that the engineering plastic is one of polypropylene, nylon 6, nylon 66, polyester PET, polyester PBT and polyphenylene sulfide; the polyethylene glycol 6000 is a flaky solid, and the dosage of the polyethylene glycol 6000 is 3-5% of the total mass of the filler.
Compared with the prior art, the invention has the following advantages:
(1) the technical scheme of the invention has the advantages of simple preparation process, uniform heat-conducting property distribution and good heat-conducting effect.
(2) The technical scheme of the invention solves the problem of difficult blanking of the carbon black filler with low bulk density, and effectively improves the loading capacity of resin.
(3) The conductive plastic prepared by the invention can easily form a three-dimensional conductive framework network in the interior.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific examples.
Embodiment 1, a method for preparing a conductive composite material based on polypropylene engineering plastic as a carrier, comprising the following steps: (1) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 40: 40: 20, firstly mixing at a high speed for 5min, controlling the temperature of the mixer at 80-100 ℃, then continuously mixing for 15min by heating a silane coupling agent according to 1.5 percent of the total mass of the composite filler, finally adding polyethylene glycol 6000, continuously mixing for 8min, cooling and crushing to obtain bonding particles with the length of 2-3 mm;
(2) adding the bonding particles obtained in the step (1) and the polypropylene engineering plastic into a double-screw extruder according to the mass ratio of 50:50, and performing melt extrusion granulation to obtain a composite material with high conductivity; the composite pellets were introduced into an injection molding machine and injection molded into specimens and tested for their properties.
The performance test results of the prepared conductive composite material are as follows: volume resistivity of 106Omega cm, tensile strength of 53MPa, bending strength of 75MPa, and melt index of 25g/10 min.
Embodiment 2, a method for preparing a conductive composite material based on nylon 6 engineering plastic as a carrier, comprising the following steps: (1) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 50: 40: 10, firstly mixing at high speed for 8min, controlling the temperature of the mixer at 80-100 ℃, then continuously mixing for 15min by heating a silane coupling agent according to 1.5 percent of the total mass of the composite filler, finally adding polyethylene glycol 6000, continuously mixing for 10min, cooling and crushing to obtain bonding particles with the length of 2-3 mm;
(2) adding the bonding particles obtained in the step (1) and nylon 6 engineering plastics into a double-screw extruder according to the mass ratio of 40:60, and performing melt extrusion granulation to obtain a composite material with high conductivity; the composite pellets were introduced into an injection molding machine and injection molded into specimens and tested for their properties.
The performance test results of the prepared conductive composite material are as follows: volume resistivity of 104Omega cm, tensile strength 77MPa, bending strength 89MPa, and melt index 45g/10 min.
Embodiment 3, a method for preparing a conductive composite material based on nylon 66 engineering plastic as a carrier, comprising the following steps: (1) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 50: 40: 10, firstly mixing at high speed for 10min, controlling the temperature of the mixer at 80-100 ℃, then heating the silane coupling agent according to 1.0 percent of the total mass of the composite filler, continuously mixing for 15min, finally adding polyethylene glycol 6000, continuously mixing for 10min, cooling and crushing to obtain bonding particles with the length of 2-3 mm;
(2) adding the bonding particles obtained in the step (1) and nylon 66 engineering plastics into a double-screw extruder according to the mass ratio of 40:60, and performing melt extrusion granulation to obtain a composite material with high conductivity; the composite pellets were introduced into an injection molding machine and injection molded into specimens and tested for their properties.
The performance test results of the prepared conductive composite material are as follows: volume resistivity of 104Omega cm, tensile strength 85MPa, bending strength 105MPa, and melt index 55g/10 min.
Embodiment 4, a method for preparing a conductive composite material based on polyester PET engineering plastic as a carrier, comprising the following steps: (1) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 40: 50:10, firstly mixing at high speed for 8min, controlling the temperature of the mixer at 80-100 ℃, then continuously mixing for 15min by heating a silane coupling agent according to 1.5 percent of the total mass of the composite filler, finally adding polyethylene glycol 6000, continuously mixing for 10min, cooling and crushing to obtain bonding particles with the length of 2-3 mm;
(2) adding the bonding particles obtained in the step (1) and polyester PET engineering plastics into a double-screw extruder according to the mass ratio of 40:60, and performing melt extrusion granulation to obtain a composite material with high conductivity; the composite pellets were introduced into an injection molding machine and injection molded into specimens and tested for their properties.
The performance test results of the prepared conductive composite material are as follows: volume resistivity of 105Omega cm, tensile strength 71MPa, bending strength 90MPa, and melt index 34g/10 min.
Embodiment 5, a method for preparing a conductive composite material based on polyester PBT engineering plastic as a carrier, comprising the following steps: (1) mixing the conductive carbon black, the nickel-plated carbon fiber and the metal fiber according to the weight ratio of 45: 50:5, adding the components together into a high-speed coulter type mixer with heating according to the mass ratio, firstly mixing at a high speed for 10min, controlling the temperature of the mixer to be 80-100 ℃, then continuously mixing for 15min by heating a silane coupling agent according to 1% of the total mass of the composite filler, finally adding polyethylene glycol 6000, continuously mixing for 10min, cooling and crushing to obtain bonding particles with the length of 2-3 mm;
(2) adding the bonding particles obtained in the step (1) and the polyester PBT engineering plastic into a double-screw extruder according to the mass ratio of 40:60 for melt extrusion granulation to obtain a composite material with higher conductivity; the composite pellets were introduced into an injection molding machine and injection molded into specimens and tested for their properties.
The performance test results of the prepared conductive composite material are as follows: volume resistivity of 104Omega cm, tensile strength 63MPa, bending strength 77MPa, and melt index 28g/10 min.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the appended claims.

Claims (3)

1. A preparation method of a conductive composite material based on engineering plastics as a carrier comprises the following steps: the conductive composite material is characterized by comprising conductive carbon black, nickel-plated carbon fiber, metal fiber and engineering plastic; the preparation process comprises the following steps: (1) and (3) mixing conductive carbon black, nickel-plated carbon fiber and metal fiber according to the weight ratio of 20-50: 10-50, namely adding the raw materials into a high-speed coulter type mixer with heating, firstly mixing the raw materials at a high speed for 3-5 min, controlling the temperature of the mixer to be 80-100 ℃, then heating a silane coupling agent according to 0.5-2% of the total mass of the composite filler, continuously mixing the raw materials for 10-20 min, finally adding polyethylene glycol 6000, continuously mixing the raw materials for 5-10 min, cooling and crushing the mixture to obtain bonding particles with the length of 2-3 mm;
(2) and then adding the bonding particles and the engineering plastics into a double-screw extruder according to the mass ratio of 30-60: 40-70 for melt extrusion granulation to obtain the composite material with higher conductivity.
2. A preparation method of a conductive composite material based on engineering plastics as a carrier comprises the following steps: the conductive carbon black is characterized in that the particle size of the conductive carbon black is d50 not more than 10 mu m, the length L = 3.5-5 mm of the nickel-plated carbon fiber, and the diameter r of each single carbon fiber is not more than 20 mu m; the metal fiber is any one of stainless steel fiber and aluminum fiber, the diameter r of the metal fiber is less than or equal to 50 mu m, and the length L of the metal fiber is less than or equal to 10 mm.
3. A preparation method of a conductive composite material based on engineering plastics as a carrier comprises the following steps: the engineering plastic is one of polypropylene, nylon 6, nylon 66, polyester PET, polyester PBT and polyphenylene sulfide; the polyethylene glycol 6000 is a flaky solid, and the dosage of the polyethylene glycol 6000 is 3-5% of the total mass of the filler.
CN201911371528.9A 2019-12-26 2019-12-26 Preparation method of conductive composite material based on engineering plastic as carrier Pending CN113045818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911371528.9A CN113045818A (en) 2019-12-26 2019-12-26 Preparation method of conductive composite material based on engineering plastic as carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911371528.9A CN113045818A (en) 2019-12-26 2019-12-26 Preparation method of conductive composite material based on engineering plastic as carrier

Publications (1)

Publication Number Publication Date
CN113045818A true CN113045818A (en) 2021-06-29

Family

ID=76505751

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911371528.9A Pending CN113045818A (en) 2019-12-26 2019-12-26 Preparation method of conductive composite material based on engineering plastic as carrier

Country Status (1)

Country Link
CN (1) CN113045818A (en)

Similar Documents

Publication Publication Date Title
CN103342858B (en) A kind of short glass fiber reinforced polypropylene compound material and its preparation method and application
US11365336B2 (en) Polymer-polymer fiber composite for high thermal conductivity
CN101812239B (en) Method for preparing particle-filled conductive thermoplastic polymer
CN107118437A (en) Lower shrinkage, Long Glass Fiber Reinforced PP Composite of low warpage and its preparation method and application
CN102775755B (en) Polyaryl ether nitrile (PEN) and carbonyl iron powder (Fe(CO)5) composite magnetic material and preparation method thereof
CN107641255B (en) Glass fiber reinforced polypropylene composite material and preparation method thereof
CN108264749A (en) A kind of high good surface carbon fiber reinforced polycarbonate composite material of flowing and preparation method thereof
CN106589588A (en) Flame-retardant enhanced-type polypropylene composite material and preparing method thereof
CN105419102A (en) High-impact resistance and low-fiber emergence reinforced PP/PA6 alloy material and preparation method thereof
CN103772921A (en) Glass fiber reinforced poly(ethylene terephthalate)/polycarbonate alloy
CN111205554A (en) Polypropylene composite material and preparation method thereof
CN103304910A (en) High-strength polystyrene conductive plastic and preparation method thereof
CN109679312A (en) A kind of polymer composites
CN107337894A (en) A kind of shock resistance lead-acid accumulator plastic housing production method
CN101870807B (en) Polycarbonate/polyethylene alloy conductive composite material and preparation method thereof
CN105017765A (en) Basic magnesium sulfate whisker/PA610T composite material and preparation method thereof
CN113045818A (en) Preparation method of conductive composite material based on engineering plastic as carrier
CN106893269B (en) A kind of resin combination and preparation method thereof, metal-resin composite
Tan et al. Crystallization and mechanical properties of carbon nanotube/continuous carbon fiber/metallocene polypropylene composites
CN101805503A (en) Polycarbonate/polyethylene alloy conductive composite material and preparation method thereof
CN102241875A (en) Filling reinforced PET/PBT alloy material and preparation method
CN109251410A (en) Low warp glass fiber reinforced polypropylene compound material and preparation method thereof
CN113462160A (en) TLCP (thermotropic liquid Crystal Polymer) modified polyphenylene sulfone/polycarbonate composite material and preparation method thereof
CN100532451C (en) High impact-resistant reinforced PET composition and method of making the same
CN115785566B (en) Low-shrinkage PP material for 3D printing and preparation method and application thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20210629