CN115298265A

CN115298265A - Thermoplastic carbon fiber composite material and preparation method and application thereof

Info

Publication number: CN115298265A
Application number: CN202280002757.7A
Authority: CN
Inventors: 王瑶; 蒋达; 张孝雷; 夏霏霏; 徐静; 周锋; 赵占廷; 陆珺
Original assignee: Far East Cable Co Ltd; New Far East Cable Co Ltd; Far East Composite Technology Co Ltd
Current assignee: Far East Cable Co Ltd; New Far East Cable Co Ltd; Far East Composite Technology Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-04
Anticipated expiration: 2042-07-06
Also published as: WO2024007179A1; CN115298265B

Abstract

The thermoplastic carbon fiber composite material comprises, by weight, 13-68 parts of carbon fibers, 15-89 parts of glass fibers and 8-30 parts of thermoplastic resin. The preparation method of the thermoplastic carbon fiber composite material comprises the following steps: and carrying out pultrusion on the carbon fibers, the glass fibers and the thermoplastic resin to obtain the thermoplastic carbon fiber composite material. The thermoplastic carbon fiber composite material provided by the application is compounded by carbon fibers, glass fibers and specific thermoplastic resin, so that the carbon fiber composite material has excellent toughness and bending performance and is suitable for overhead conductors.

Description

Thermoplastic carbon fiber composite material and preparation method and application thereof

Technical Field

The embodiment of the application relates to the technical field of overhead conductor power transmission, for example to a thermoplastic carbon fiber composite material and a preparation method and application thereof.

Background

The carbon fiber composite core rod is used as a reinforcing core, and compared with a steel core in a traditional overhead conductor, the carbon fiber composite core rod has the advantages of light weight, high strength, small linear expansion coefficient, high temperature resistance, corrosion resistance, environmental affinity, no hysteresis loss and the like, and can effectively realize the safety of a power transmission line, and is energy-saving and environment-friendly.

The structure of the present carbon fiber composite core rod is as follows: the epoxy resin is used as a resin matrix, the inner layer is made of carbon fiber, and the outer layer is made of glass fiber or basalt fiber. For example, CN103000279a discloses a carbon fiber composite core rod, wherein a glass fiber layer I and a glass fiber layer II are disposed on an outer surface of a carbon fiber core body, and the carbon fiber core body, the glass fiber layer I and the glass fiber layer II are integrally connected through an epoxy resin adhesive by curing, so that the compression strength and the shear strength of the carbon fiber composite core rod are improved. However, the carbon fiber composite material has poor toughness.

CN109537287A discloses a composite material lead core material and a manufacturing method thereof, wherein the composite material lead core material is composed of a gummed carbon fiber central layer and a gummed glass fiber coating layer; the impregnation carbon fiber central layer is formed by compounding carbon fibers, graphene, nano copper powder, epoxy resin and a curing agent thereof, and the impregnation glass fiber coating layer is formed by compounding glass fibers, epoxy resin and a curing agent thereof. The lead core material is light in weight, high in strength, capable of conveying larger load, excellent in dielectric property and long in service life. But the composite wire core material has insufficient bending properties.

CN103413629A discloses a power transmission line carbon fiber composite core and a preparation method thereof, wherein the composite core comprises carbon fibers, glass fibers and epoxy resin coated on the surfaces of the carbon fibers and the glass fibers, and the preparation method comprises the following steps: pretreating, dehumidifying, soaking and gluing, and pultrusion molding; the preparation method not only ensures the hardness of the final product, but also meets the requirements of production smoothness and production efficiency improvement, and the carbon fiber composite core produced by combination can completely meet the requirements of power transmission. But the toughness and bending properties of the carbon fiber composite core need to be further improved.

In the related technology, epoxy resin is generally adopted as a matrix in the wire, so that inherent defects of poor toughness and insufficient bending performance exist, cracks and other damages are often generated due to reasons of construction non-standardization and the like in actual construction, and then the cracks and other damages are further expanded to the whole wire, so that accidents such as wire breakage and the like occur in operation.

Therefore, it is an urgent need in the art to develop a wire core rod with good toughness, excellent bending performance and high temperature resistance.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the application provides a thermoplastic carbon fiber composite material and a preparation method and application thereof. The thermoplastic carbon fiber composite material is prepared by compounding carbon fibers, glass fibers and specific thermoplastic resin, so that the carbon fiber composite material has excellent toughness and bending performance, is high-temperature resistant and is suitable for the overhead conductor core rod.

In a first aspect, embodiments of the present application provide a thermoplastic carbon fiber composite material, which includes, by weight, 13 to 68 parts of carbon fibers, 15 to 89 parts of glass fibers, and 8 to 30 parts of a thermoplastic resin.

In the embodiment of the application, adopt the traditional epoxy of thermoplastic resin replacement, with carbon fiber and glass fiber complex, greatly promoted carbon-fibre composite's toughness and bending property, guarantee carbon-fibre composite simultaneously and can normally use under high temperature.

Preferably, the thermoplastic carbon fiber composite material comprises 13 to 68 parts by weight of carbon fibers, for example, 15 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 34 parts, 38 parts, 42 parts, 46 parts, 48 parts, 52 parts, 56 parts, 60 parts, 64 parts, 68 parts and the like.

Preferably, the thermoplastic carbon fiber composite material includes 15 to 89 parts by weight of glass fiber, for example, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, etc.

Preferably, the thermoplastic carbon fiber composite material includes 8 to 30 parts by weight of the thermoplastic resin, for example, 9 parts, 10 parts, 11 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, etc.

Preferably, the mass ratio of the fibers to the thermoplastic resin in the thermoplastic carbon fiber composite material is (4.5 to 6.5): 1, and for example, 4.6.

In the embodiment of the application, the fiber refers to the sum of the parts of carbon fiber and glass fiber; within a specific mass ratio of the fibers to the thermoplastic resin, the composite material has better torsion resistance and heat resistance.

Preferably, the carbon fibers are untwisted carbon fibers.

Preferably, the carbon fibers are present in the form of carbon fiber tows.

Preferably, the carbon fiber tow comprises 6000 to 24000 carbon fiber monofilaments, which may be 8000, 10000, 12000, 14000, 16000, 18000, 20000, 22000, or the like, for example.

In the embodiment of the application, in the carbon fiber tow, the number of carbon fiber monofilaments is less than 6000, so that the cost is high; if the number of the carbon fibers is larger than 2400, the torsion resistance is poor.

The carbon fiber preferably has a tensile strength of 4900 to 6370MPa, and may have, for example, 5000MPa, 5100MPa, 5200MPa, 5300MPa, 5400MPa, 5500MPa, 5600MPa, 5800MPa, 6000MPa, 6100MPa, 6200MPa, 6300MPa, or the like.

The carbon fiber preferably has an elongation at break of 1.7 to 2.3%, and may be, for example, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.25%, or the like.

Preferably, the glass fibers are untwisted alkali-free glass fibers.

The diameter of the glass fiber is preferably 14 to 25 μm, and may be 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, or the like, for example.

The glass fiber preferably has a tensile strength of 2300 to 2800MPa, and may be 2350MPa, 2400MPa, 2450MPa, 2500MPa, 2550MPa, 2600MPa, 2650MPa, 2700MPa, 2750MPa, 2800MPa, or the like.

The glass fiber preferably has an elongation at break of 3.0 to 4.0%, and may be, for example, 3.2%, 3.4%, 3.6%, 3.8%, or the like.

Preferably, the thermoplastic resin includes any one of polyphenylene sulfide, polyether sulfone or polyether ether ketone or a combination of at least two thereof.

Preferably, the thermoplastic resin comprises a combination of polyphenylene sulfide, polyethersulfone and polyetheretherketone.

Preferably, the mass ratio of the polyphenylene sulfide, the polyether sulfone and the polyether ether ketone is (1-2): 1, and can be, for example, 1.

In the embodiment of the application, the thermoplastic resin adopts the combination of polyphenylene sulfide, polyether sulfone and polyether ether ketone, and the polyphenylene sulfide, polyether sulfone and polyether ether ketone can further improve the toughness, bending property and high temperature resistance of the carbon fiber composite material in a specific ratio.

The number average molecular weight of the thermoplastic resin is preferably 30000 to 350000, and may be 40000, 60000, 80000, 100000, 150000, 200000, 250000, 300000, or the like, for example.

In a second aspect, embodiments of the present application provide a method for preparing a thermoplastic carbon fiber composite material according to the first aspect, the method comprising the steps of:

and carrying out pultrusion on the carbon fibers, the glass fibers and the thermoplastic resin to obtain the thermoplastic carbon fiber composite material.

In an embodiment of the present application, the step of pultrusion comprises:

and (3) putting the carbon fiber and the glass fiber into the thermoplastic resin suspension for forming to obtain the thermoplastic carbon fiber composite material.

Preferably, the yarn unwinding device comprises a tension spinning frame.

Preferably, the equipment for immersing the thermoplastic resin suspension comprises a dipping tank, a yarn guide roller and a dipping press roller.

Preferably, an ultrasonic generator is arranged at the bottom of the glue dipping tank.

In the application, the thermoplastic resin particle suspension is dispersed through the ultrasonic generator, so that the thermoplastic resin particles are uniformly dispersed in the solution, and the stability of gum dipping is improved.

Preferably, the solution in the thermoplastic resin suspension comprises any one of methanol, ethanol or ethyl acetate or a combination of at least two thereof.

Preferably, the concentration of the thermoplastic resin suspension is 30 to 70g/L, and may be, for example, 35g/L, 40g/L, 45g/L, 50g/L, 55g/L, 60g/L, 65g/L, or the like.

In the embodiment of the application, the carbon fibers, the glass fibers and the thermoplastic resin particles are suspended and impregnated, so that the thermoplastic resin particles are uniformly distributed on the surfaces of the fibers, and the quality stability of the pultruded core rod is improved conveniently.

Preferably, the particle size of the thermoplastic resin in the thermoplastic resin suspension is 10 to 200. Mu.m, and may be, for example, 20. Mu.m, 40. Mu.m, 60. Mu.m, 80. Mu.m, 100. Mu.m, 120. Mu.m, 140. Mu.m, 160. Mu.m, 180. Mu.m, or the like.

In the embodiment of the application, thermoplastic resin particles and a solution are prepared into a thermoplastic resin suspension, the thermoplastic resin particles are uniformly distributed on the surfaces of the carbon fibers and the glass fibers through suspension impregnation, and then the carbon fibers and the glass fibers can be fully impregnated through melting and pultrusion, so that the toughness and the bending strength of the carbon fiber composite material are further improved, and the cost is saved.

Preferably, the step of removing the solution is further included after the dipping into the thermoplastic resin suspension.

Preferably, the solution removing means is a heatable apparatus equipped with a ventilation duct, an exhaust fan and a condensate return means.

Preferably, the temperature of the removal solution is 80 to 100 ℃, for example, 85 ℃, 90 ℃, 95 ℃ or the like.

In the embodiment of the application, the solution removing device with the ventilation device and the condensation reflux device is adopted, so that the solution can be recycled, resources are saved, and the environmental pollution is reduced.

Preferably, the molding comprises molding after the first-stage heating melting, the second-stage heating melting, the first-stage cooling shaping and the second-stage cooling shaping.

Preferably, the temperature for the first stage of heating and melting is 330 to 360 ℃, and may be, for example, 335 ℃, 340 ℃, 345 ℃, 350 ℃, 355 ℃ or the like.

The temperature for the second stage heating and melting is preferably 360 to 390 ℃, and may be, for example, 365 ℃, 370 ℃, 375 ℃, 380 ℃, 385 ℃ or the like.

Preferably, the temperature of the first stage cooling and shaping is 230-260 ℃, for example 235 ℃, 240 ℃, 245 ℃, 250 ℃, 255 ℃ and the like.

Preferably, the temperature of the second stage cooling and shaping is 150 to 180 ℃, for example, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃ and the like.

In the embodiment of the application, adopt the low-temperature segmentation heating mode of four sections high temperature back, make thermoplasticity carbon-fibre composite can the stable shaping.

Preferably, the drawing speed at the time of molding is 2 to 5m/min, and may be, for example, 2.5m/min, 3m/min, 3.5m/min, 4m/min, 4.5m/min, or the like.

In an embodiment of the present application, the preparation method includes:

after putting yarns on carbon fibers and glass fibers through a tension spinning frame, immersing the carbon fibers and the glass fibers into a thermoplastic resin suspension liquid through a yarn guide roller and a dipping press roller in a dipping tank with an ultrasonic generator at the bottom, removing the solution, and forming after first-stage heating and melting, second-stage heating and melting, first-stage cooling and shaping and second-stage cooling and shaping to obtain the thermoplastic carbon fiber composite material; the temperature of the first section for heating and melting is 330-360 ℃, the temperature of the second section for heating and melting is 360-390 ℃, the temperature of the first section for cooling and shaping is 230-260 ℃, and the temperature of the second section for cooling and shaping is 150-180 ℃.

In a third aspect, embodiments of the present application provide an overhead conductor mandrel comprising the thermoplastic carbon fiber composite material of the first aspect.

The recitation of numerical ranges herein includes not only the above-recited values, but also any values between any of the above-recited numerical ranges not recited, and for brevity and clarity, this application is not intended to be exhaustive of the specific values subsumed within the range.

Compared with the related art, the beneficial effects of the embodiment of the application are as follows:

according to the thermoplastic carbon fiber composite material provided by the embodiment of the application, the overhead conductor core rod comprising the thermoplastic carbon fiber composite material has excellent high temperature resistance, toughness and bending performance through compounding of specific types of thermoplastic resin, carbon fiber and glass fiber; the performance indexes can meet the requirements of GB/T29324-2012 core rod of fiber reinforced resin matrix composite material for overhead conductors.

Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.

Drawings

The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not limit the disclosure.

FIG. 1 is a schematic structural diagram of a pultrusion device adopted in the preparation method provided by the embodiment 1 of the application;

wherein, 1-tension yarn releasing frame, 2-gum dipping tank, 3-solution removing device, 4-forming mould, 5-traction machine;

FIG. 2 is a schematic structural diagram of a dip tank in a pultrusion device adopted in the preparation method provided in the application example 1;

21-thermoplastic resin suspension, 22-yarn guide roller, 23-gum dipping press roller and 24-ultrasonic generator;

FIG. 3 is a schematic view showing the structure of a solution removing apparatus in a pultrusion device employed in the manufacturing method provided in example 1 of the present application;

wherein, 31-an exhaust fan, 32-a condensation reflux device, 33-a ventilation pipeline and 34-a solution removal main device.

Detailed Description

The technical solution of the present application is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present application and should not be construed as a specific limitation of the present application.

The materials used in the examples and comparative examples of the present application are as follows:

carbon fiber: dongli T700 of Japan

Glass fiber: american Owensconing SE1200

Polyphenylene sulfide: suwei PPS PR11

Polyether sulfone: basf, germany E2010

Polyether ether ketone: england Weggess PEEK 650PF

Example 1

The present embodiment provides a thermoplastic carbon fiber composite material comprising 18 parts of carbon fibers (the carbon fibers comprise 12000 carbon fiber monofilaments), 26 parts of glass fibers, and 9 parts of a thermoplastic resin; the thermoplastic resin comprises polyphenylene sulfide (particle size of 100 μm), polyether sulfone (particle size of 100 μm) and polyether ether ketone (particle size of 100 μm) in a mass ratio of 1.

The embodiment provides a preparation method of the thermoplastic carbon fiber composite material, which comprises the following steps:

after putting yarns on a tension yarn putting frame, soaking carbon fibers and glass fibers into an ethanol suspension (the concentration of thermoplastic resin is 50 g/L) of thermoplastic resin in a dipping tank with an ultrasonic generator at the bottom through a yarn guide roller and a dipping press roller, removing the ethanol through a solution removing device comprising a ventilating duct, an exhaust fan and a condensation reflux device at the temperature of 90 ℃, and condensing and recycling; then carrying out first-stage heating and melting (330 ℃), second-stage heating and melting (360 ℃), first-stage cooling and shaping (240 ℃) and second-stage cooling and shaping (160 ℃) and then carrying out pultrusion molding to obtain the thermoplastic composite material; the drawing speed during the molding was 3 m/min.

The schematic diagram of the composition structure of pultrusion equipment adopted by the preparation method is shown in figure 1, and the pultrusion equipment comprises a tension yarn releasing frame 1, a gum dipping tank 2, a solution removing device 3, a forming mold 4 and a tractor 5; the structural schematic diagram of the impregnation tank is shown in fig. 2, and comprises a thermoplastic resin suspension 21, a yarn guide roller 22, a impregnation press roller 23 and an ultrasonic generator 24; the solution removing device is schematically shown in fig. 3, and includes an exhaust fan 31, a condensate reflux device 32, a vent pipe 33, and a solution removing main device 34.

Example 2

This example provides a thermoplastic carbon fiber composite comprising 18 parts of carbon fibers (the carbon fibers comprise 12000 carbon fiber monofilaments), 26 parts of glass fibers, and 8 parts of polyphenylene sulfide (particle size 100 μm).

after the carbon fiber and the glass fiber are reeled by a tension reeling frame, the carbon fiber and the glass fiber are dipped into an ethanol suspension (the concentration of polyphenylene sulfide is 50 g/L) of polyphenylene sulfide in a dipping tank with an ultrasonic generator arranged at the bottom through a yarn guide roller and a dipping press roller, and the ethanol is removed and condensed and recovered by a solution removing device comprising a ventilating duct, an exhaust fan and a condensation reflux device under the condition of 90 ℃; then carrying out first-stage heating and melting (280 ℃), second-stage heating and melting (320 ℃), first-stage cooling and shaping (240 ℃) and second-stage cooling and shaping (160 ℃) and then carrying out pultrusion molding to obtain the thermoplastic composite material; the drawing speed during the molding was 3 m/min.

Example 3

This example provides a thermoplastic carbon fiber composite material comprising 18 parts of carbon fibers (the carbon fibers comprise 12000 carbon fiber monofilaments), 26 parts of glass fibers, and 8 parts of polyethersulfone (particle size 100 μm).

after putting yarns on carbon fibers and glass fibers through a tension yarn putting frame, immersing the carbon fibers and the glass fibers into an ethanol suspension (the concentration of polyether sulfone is 50 g/L) of polyether sulfone in a gum dipping tank with an ultrasonic generator arranged at the bottom through a yarn guide roller and a gum dipping press roller, removing the ethanol through a solution removing device comprising a ventilating duct, an exhaust fan and a condensation reflux device at the temperature of 90 ℃, and condensing and recovering; then carrying out first-stage heating and melting (330 ℃), second-stage heating and melting (360 ℃), first-stage cooling and shaping (240 ℃) and second-stage cooling and shaping (160 ℃) and then carrying out pultrusion molding to obtain the thermoplastic carbon fiber composite material; the drawing speed during the molding was 3 m/min.

Example 4

This example provides a thermoplastic carbon fiber composite comprising 18 parts of carbon fibers (the carbon fibers comprise 12000 carbon fiber monofilaments), 26 parts of glass fibers, and 8 parts of polyetheretherketone (particle size 100 μm).

after putting yarns on a tension yarn putting frame, soaking carbon fibers and glass fibers into an ethanol suspension of polyether-ether-ketone (the concentration of the polyether-ether-ketone is 50 g/L) in a gum dipping tank with an ultrasonic generator arranged at the bottom through a yarn guide roller and a gum dipping press roller, removing the ethanol through a solution removing device comprising a ventilating duct, an exhaust fan and a condensation reflux device at the temperature of 90 ℃, and condensing and recovering the ethanol; then carrying out first-stage heating and melting (350 ℃), second-stage heating and melting (380 ℃), first-stage cooling and shaping (240 ℃) and second-stage cooling and shaping (160 ℃) and then carrying out pultrusion molding to obtain the thermoplastic composite material; the drawing speed during the molding was 2 m/min.

Example 5

The present embodiment provides a thermoplastic carbon fiber composite material comprising 36 parts of carbon fibers (the carbon fibers comprise 6000 carbon fiber monofilaments), 54 parts of glass fibers and 18 parts of a thermoplastic resin; the thermoplastic resin comprises polyphenylene sulfide (particle size of 100 μm), polyether sulfone (particle size of 100 μm) and polyether ether ketone (particle size of 100 μm) in a mass ratio of 1.

This example provides a method for preparing the thermoplastic carbon fiber composite material, which is the same as in example 1.

Example 6

The present embodiment provides a thermoplastic carbon fiber composite material comprising 60 parts of carbon fibers (the carbon fibers comprise 24000 carbon fiber monofilaments), 75 parts of glass fibers and 29 parts of a thermoplastic resin; the thermoplastic resin comprises polyphenylene sulfide (with the particle size of 100 mu m), polyether sulfone (with the particle size of 100 mu m) and polyether ether ketone (with the particle size of 100 mu m) in a mass ratio of 2.

Example 7

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the polyphenylene sulfide is replaced by thermoplastic polyamide, and other raw materials and amounts are the same as those of example 1.

The embodiment provides a thermoplastic carbon fiber composite material, wherein the temperature of the first section for heating and melting is 190 ℃, the temperature of the second section for heating and melting is 260 ℃, the temperature of the first section for cooling and shaping is 200 ℃, the temperature of the second section for cooling and shaping is 150 ℃, and the rest steps are the same as those in embodiment 1.

Example 8

The embodiment provides a thermoplastic carbon fiber composite material, which is different from the embodiment 1 only in that the thermoplastic resin comprises polyphenylene sulfide, polyether sulfone and polyether ether ketone in a mass ratio of 1.

This example provides a thermoplastic carbon fiber composite material, which has the same steps as in example 1.

Example 9

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the ethanol suspension of the thermoplastic resin is replaced by a molten thermoplastic resin glue solution, and other raw materials, the amount and the preparation method are the same as those of example 1.

Example 10

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the total amount of the fibers and the thermoplastic resin is unchanged, the mass ratio of the fibers to the thermoplastic resin is 4:1, and other raw materials, mixing ratios and preparation methods are the same as example 1.

Example 11

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the total amount of the fibers and the thermoplastic resin is unchanged, the mass ratio of the fibers to the thermoplastic resin is 7:1, and other raw materials, compounding ratios and preparation methods are the same as those of example 1.

Example 12

This example provides a thermoplastic carbon fiber composite material which differs from example 1 only in that the carbon fiber is replaced with a tow comprising 48000 carbon fiber monofilaments, and the other raw materials, amounts and preparation methods are the same as in example 1.

Example 13

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the glass fiber is replaced with a glass fiber having a diameter of 30 μm, and other raw materials, amounts and preparation methods are the same as those of example 1.

Example 14

This example provides a thermoplastic carbon fiber composite material, which is different from example 1 only in that the glass fiber is replaced with a glass fiber having a diameter of 10 μm, and other raw materials, amounts and preparation methods are the same as those of example 1.

Comparative example 1

This comparative example provides a carbon fiber composite material which differs from example 1 only in that the thermoplastic resin is replaced with an epoxy resin, and the other components and amounts are the same as in example 1.

The comparative example provides a preparation method of a carbon fiber composite material, and the specific steps are the same as those of example 1.

Performance testing

(1) Toughness and bending properties: testing by using a torsion test method specified in GB/T29324-2012, but not limiting the torsion angle, and representing the toughness and the bending performance of the thermoplastic carbon fiber composite core rod by using the limit torsion angle when the thermoplastic carbon fiber composite core rod cracks; the larger the limit torsion angle is, the better the toughness and bending performance of the material are;

(2) High temperature resistance: GB/T1634.2-2004 section 2 of determination of the deformation temperature under load of plastics: the thermal deformation temperature of the thermoplastic carbon fiber composite core rod is tested by the method specified in the plastic, hard rubber and long fiber reinforced composite materials to characterize the high temperature resistance.

The specific test results are shown in table 1:

TABLE 1

As can be seen from the table above, the thermoplastic carbon fiber composite material provided by the application can improve the toughness and the bending strength of the carbon fiber composite material through the compounding of thermoplastic resin, carbon fiber and glass fiber, and has better high temperature resistance.

As can be seen from examples 1, 5 and 6, when the thermoplastic resin is a combination of polyphenylene sulfide, polyether sulfone and polyether ether ketone, the performance of the thermoplastic carbon fiber composite material is best, the limit torsion angle is 1140-1240 degrees, and the thermal deformation temperature is 339-343 ℃; as can be seen from examples 1, 5 and 6 and examples 2 to 4, when the thermoplastic resin is polyphenylene sulfide, polyether sulfone or polyether ether ketone, the heat resistance of the thermoplastic carbon fiber composite material is slightly poor; as is clear from examples 1 and 7, when the polyphenylene sulfide was replaced with a thermoplastic polyamide, the heat resistance of the composite material was deteriorated; as is clear from comparison between example 1 and example 8, when the polyphenylene sulfide, polyether sulfone and polyether ether ketone are not in a specific compounding ratio, the toughness is deteriorated; it is clear from examples 1 and 9 that, not the specific preparation method of the present application, the toughness and the heat resistance are inferior to those of the thermoplastic carbon fiber composite material prepared by the preparation method of the present application; as can be seen from comparison of example 1 with examples 10 and 11, the fibers and the thermoplastic resin are not in a specific compounding ratio, and the toughness and heat resistance of the composite material are deteriorated; as is clear from comparison between example 1 and example 12, the number of carbon fiber filaments in the carbon fiber is not within a specific range, and the toughness and heat resistance of the composite material are both deteriorated; as is clear from comparison of example 1 with examples 13 and 14, the diameter of the glass fiber is not within a specific range, and the toughness and heat resistance of the composite material are deteriorated; as can be seen from comparison of example 1 with comparative example 1, the performance of the carbon fiber composite material is far inferior to that of the thermoplastic carbon fiber composite material when the thermoplastic resin is replaced by the epoxy resin.

To sum up, the thermoplastic carbon fiber composite material provided by the application is compounded through carbon fiber, glass fiber and thermoplastic resin, so that the carbon fiber composite material has excellent toughness and bending property and is suitable for the overhead conductor core rod.

The applicant declares that the above description is only a specific embodiment of the present application, but the scope of the present application is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure fall within the scope and disclosure of the present application.

Claims

1. The thermoplastic carbon fiber composite material comprises, by weight, 13-68 parts of carbon fibers, 15-89 parts of glass fibers and 8-30 parts of thermoplastic resin.

2. The thermoplastic carbon fiber composite of claim 1, wherein the mass ratio of fibers to thermoplastic resin in the thermoplastic carbon fiber composite is (4.5-6.5): 1;

preferably, the carbon fibers are untwisted carbon fibers;

preferably, the carbon fibers are present in the form of carbon fiber tows;

preferably, the carbon fiber tow comprises 6000 to 24000 carbon fiber monofilaments;

preferably, the tensile strength of the carbon fiber is 4900-6370 MPa;

preferably, the elongation at break of the carbon fiber is 1.7 to 2.3%;

preferably, the glass fibers are untwisted alkali-free glass fibers;

preferably, the diameter of the glass fiber is 14 to 25 μm;

preferably, the tensile strength of the glass fiber is 2300 to 2800MPa;

preferably, the elongation at break of the glass fiber is 3.0 to 4.0%;

preferably, the thermoplastic resin comprises any one or a combination of at least two of polyphenylene sulfide, polyether sulfone or polyether ether ketone;

preferably, the thermoplastic resin comprises a combination of polyphenylene sulfide, polyethersulfone and polyetheretherketone;

preferably, the mass ratio of the polyphenylene sulfide to the polyether sulfone to the polyether ether ketone is (1-2): 1;

preferably, the number average molecular weight of the thermoplastic resin is 30000 to 350000.

3. A method of preparing a thermoplastic carbon fiber composite according to claim 1 or 2, comprising the steps of:

4. The production method according to claim 3, wherein the step of pultrusion includes:

and (3) putting yarns on the carbon fibers and the glass fibers, immersing the carbon fibers and the glass fibers into the thermoplastic resin suspension, and forming to obtain the thermoplastic carbon fiber composite material.

5. The manufacturing method according to claim 4, wherein the yarn releasing device comprises a tension spinning frame;

preferably, the equipment for immersing the thermoplastic resin suspension comprises an impregnation tank, a yarn guide roller and an impregnation press roller;

preferably, an ultrasonic generator is arranged at the bottom of the glue dipping tank;

preferably, the solution in the thermoplastic resin suspension comprises any one of methanol, ethanol or ethyl acetate or a combination of at least two thereof;

preferably, the concentration of the thermoplastic resin suspension is 30-70 g/L;

preferably, the particle size of the thermoplastic resin in the thermoplastic resin suspension is 10 to 200 μm.

6. The production method according to claim 4 or 5, wherein the immersion into the thermoplastic resin suspension further comprises a step of removing the solution;

preferably, the temperature of the removal solution is 80 to 100 ℃.

7. The production method according to any one of claims 4 to 6, wherein the molding includes molding after undergoing first-stage heat melting, second-stage heat melting, first-stage cooling setting, and second-stage cooling setting.

8. The preparation method according to claim 7, wherein the temperature of the first stage heating and melting is 330-360 ℃;

preferably, the temperature for heating and melting the second section is 360-390 ℃;

preferably, the temperature of the first section of cooling and shaping is 230-260 ℃;

preferably, the temperature of the second section of cooling and shaping is 150-180 ℃;

preferably, the drawing speed during the molding is 2 to 5m/min.

9. The production method according to any one of claims 3 to 8, which comprises:

after putting the carbon fiber and the glass fiber through a tension spinning frame, immersing the carbon fiber and the glass fiber into a thermoplastic resin suspension through a yarn guide roller and a dipping press roller in a dipping tank with an ultrasonic generator arranged at the bottom, removing the solution, and forming after first-stage heating melting, second-stage heating melting, first-stage cooling shaping and second-stage cooling shaping to obtain the thermoplastic carbon fiber composite material; the temperature of the first section heating and melting is 330-360 ℃, the temperature of the second section heating and melting is 360-390 ℃, the temperature of the first section cooling and shaping is 230-260 ℃, and the temperature of the second section cooling and shaping is 150-180 ℃.

10. An overhead conductor mandrel, wherein the overhead conductor mandrel comprises the thermoplastic carbon fiber composite of claim 1 or 2.