CN104151768A - Carbon fiber reinforced ABS (Acrylonitrile Butadiene Styrene) resin composite material with superior heat conductivity and preparation method - Google Patents

Abstract

The invention relates to a carbon fiber reinforced ABS resin composite material with excellent thermal conductivity and a preparation method thereof. The composite material is composed of the following materials in parts by weight: 90 parts of ABS resin, 10 parts of maleic anhydride grafted ABS, 10-80 parts of carbon fiber, and 10 parts of inorganic filler ~20 parts, 0.5~5 parts of coupling agent, 0.2~1 part of antioxidant and 0~3 parts of lubricant; weigh the raw materials of each component according to the proportion; mix the raw materials of each component except carbon fiber at high speed; the obtained The mixed material is added to the hopper of the twin-screw extruder, and the carbon fiber is added to the fiber-filling port of the extruder to extrude and granulate. Compared with the prior art, the composite material provided by the present invention has high rigidity and good heat dissipation performance, and is suitable for the production and processing of thin-walled and lightweight electronic/electrical products; and the cost of raw materials is low, and the preparation process is simple, which is suitable for industrialized continuous production .

Description

Carbon fiber reinforced ABS resin composite material with excellent thermal conductivity and preparation method thereof

technical field

The invention belongs to the technical field of carbon fiber composite materials, and in particular relates to a carbon fiber reinforced thermoplastic ABS resin composite material with excellent thermal conductivity and a preparation method thereof.

Background technique

ABS resin refers to acrylonitrile-butadiene-styrene copolymer, which is non-toxic, tasteless, low water absorption, mechanical properties, thermal properties, wear resistance, chemical resistance and dyeability, good molding and mechanical processing Good performance, widely used in refrigerator lining, TV casing, vacuum cleaner, air conditioner, telephone, instrument, computer, copier and other electronic and electrical industries. With social development and industrial progress, electronic components and electronic equipment are becoming more and more thin-walled, lightweight, and miniaturized. Therefore, the requirements for the rigidity and thermal conductivity of materials are getting higher and higher. For example, notebook computers need to be thin, light, and small, which requires notebook shell materials, CPU materials, and various integrated circuit board materials to have high modulus, high rigidity, and strong resistance to external force deformation, so as to reduce the thickness; Good thermal conductivity can improve the cooling problem of the computer, thereby improving the running speed and stability of the computer. In order to improve the rigidity and thermal conductivity of ABS resin,

Composite modification methods can be used to improve the rigidity and heat dissipation of polymer materials. In order to improve the rigidity of ABS resin, it is often possible to strengthen composite methods such as glass fiber and carbon fiber. Among them, the carbon fiber used for reinforcement is mainly polyacrylonitrile-based carbon fiber, so these methods cannot improve the thermal conductivity of ABS. In order to improve the heat dissipation of ABS (essentially thermal conductivity), filler particles with high thermal conductivity are usually used to prepare filled thermal conductive composite materials. Commonly used thermally conductive fillers include 1. Metal fillers, such as silver, copper, aluminum, magnesium, nickel and other powders; 2. Inorganic non-metallic fillers, such as aluminum nitride, boron nitride, magnesium oxide, silicon carbide and other nitrides and oxides , carbides, etc.; 3. Carbon materials with graphite structure, such as graphene, carbon nanotubes, nanocarbon fibers and pitch-based carbon fibers (Document 1: Research on electrical and thermal conductivity of short fiber/ABS resin composite materials, new chemical materials, 2014, Vol.42, No.4, p103-106), etc. However, metal thermally conductive fillers have the disadvantages of high density, corrosion, and the decline in the mechanical properties of ABS materials; inorganic non-metallic fillers are not very effective in improving the thermal conductivity of ABS resins, and often reduce the mechanical properties of ABS resins. Although the method of using carbon materials such as graphene, carbon nanotubes and nano-carbon fibers can significantly improve the thermal conductivity of ABS resin, these materials are expensive and cannot be industrialized, and the technologies involved are only in laboratory research. stage. Document 1 prepared the thermally conductive ABS/pitch carbon fiber composite material by impregnating the acetone solution of ABS resin into the self-made pitch-based carbon fiber, vacuuming the solvent, and then hot-pressing. Organic solvents can lead to hazards such as degradation of mechanical properties, and are completely unfeasible in industry. In addition, there are still problems such as not suitable for the preparation of products with complex structures, materials with only one-dimensional and two-dimensional thermal conductivity, and mechanical properties that have not been improved.

Contents of the invention

The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a carbon fiber-reinforced carbon fiber-reinforced carbon fiber with excellent thermal conductivity suitable for industrial continuous production, which can significantly improve the mechanical properties and thermal conductivity of the material at the same time, with low raw material cost and simple preparation process. ABS resin composite material and preparation method thereof.

The object of the present invention can be achieved through the following technical solutions: a carbon fiber reinforced ABS resin composite material with excellent thermal conductivity, characterized in that the composite material is made up of the following materials by weight: 90 parts of ABS resin, grafted with maleic anhydride 10 parts of ABS, 10-80 parts of carbon fiber, 10-20 parts of inorganic filler, 0.5-5 parts of coupling agent, 0.2-1 part of antioxidant and 0-3 parts of lubricant.

The ABS resin is selected from pellets or powders of extrusion grade, injection molding grade, filling grade or flame retardant grade.

The content of the carbon fiber is 10-80 parts. When the short carbon fiber content is less than 10 parts, a perfect heat conduction channel cannot be formed in the ABS resin matrix, so the improvement of the thermal conductivity of the ABS resin is not significant. The higher the carbon fiber content, the higher the mechanical properties and thermal conductivity of ABS resin. However, when the mass percentage of short carbon fibers is too high and its content is greater than 80 parts, the wear and tear on the mixing equipment will be serious, and the service life of the screw will be shortened. In addition, if the content is too high, the melt viscosity of the composite material will be high and the melt fluidity will be reduced, which will be unfavorable to the molding process, especially unfavorable to the molding of thin-walled and complex structural products.

The carbon fiber is a high-performance pitch-based carbon fiber with a thermal conductivity greater than 200W/(mK) and a tensile modulus greater than 700GPa. commercialized series K1392U, K13C6U, K13D2U, K63A12 or Cytec P-1002K, P-100S 2K, P-1202K, P-120S 2K and other pitch-based carbon fibers, or other pitch-based carbon fibers with comparable modulus and thermal conductivity.

The carbon fibers are chopped carbon fibers with an average length of 10 μm to 2 mm. When the fiber length is less than 10 μm, it is not conducive to the fiber to form a continuous heat conduction path in the ABS resin matrix, and the heat conduction performance of the ABS resin cannot be effectively improved; therefore, the larger the fiber length value, the better the strength, modulus and thermal conductivity of the material. . However, when the fiber length is greater than 2 mm, the composite material will have high melt viscosity and poor fluidity, which will bring difficulties to the subsequent molding and processing of products, especially not conducive to the molding and processing of thin-walled and complex structural products.

The inorganic filler is selected from one or more of talcum powder, glass microspheres, calcium carbonate, barium sulfate, magnesium oxide, calcium sulfate, silica lime, mica powder, diatomaceous earth or montmorillonite. A mixture of talc, magnesium oxide and aluminum oxide in a weight ratio of 1:3:1 is preferred.

The coupling agent is selected from vinyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-methacrylate propyl silane, γ-shrink One or more of glyceryl ether oxypropyl trimethoxysilane, tetraisopropyl orthotitanate, isopropyl triisostearyl titanate or polyester-modified polydimethylsiloxane. Preference is given to gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane in a weight ratio of 1:1.

The antioxidant is selected from tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, N,N'-bis-(3-(3,5-di One or more of tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine or tris[2,4-di-tert-butylphenyl]phosphite;

The lubricant is selected from one or more of ethylene bis fatty acid amide, ethylene-acrylic acid copolymer or silicone powder.

A method for preparing a carbon fiber reinforced ABS resin composite material with excellent thermal conductivity, characterized in that it comprises the following steps:

(1) fully drying raw material carbon fiber, ABS resin and maleic anhydride grafted ABS;

(2) taking each component raw material according to the proportioning ratio;

(3) High-speed mixing of raw materials of each component except carbon fiber;

(4) Put the mixed material obtained in step (3) into the hopper of the twin-screw extruder, add carbon fiber at the fiberizing port of the extruder, and extrude to pelletize.

The drying condition in the step (1) is blast drying at 70-90° C. for 4-6 hours, and the water content before processing must be less than 0.02 wt%. Carbon fiber is hygroscopic, and drying before processing is very important, otherwise it will lead to the degradation of ABS resin during high temperature processing, resulting in a decrease in mechanical properties.

The temperature settings of the six zones of the twin-screw extruder from the feeding port to the die head of the extruder in the step (4) are respectively 150°C, 175°C, 185°C, 195°C, 195°C, and 200°C , The host speed is 20-50 Hz.

The present invention adopts 90 parts of ABS resin and 10 parts of maleic anhydride grafted ABS as the resin matrix. Due to the reactivity and strong polarity of maleic anhydride polar molecules, adding maleic anhydride grafted ABS can effectively improve the bond between the matrix and carbon fibers. Combined with properties, it promotes the dispersion of carbon fibers and is conducive to the formation of carbon fiber heat conduction paths inside the material.

Pitch-based carbon fiber is a carbon fiber prepared from petroleum heavy oil pitch, coal tar pitch, or naphthalene-based condensed ring aromatic compounds. According to its performance, it can be divided into two types: general-purpose pitch-based carbon fiber and high-performance pitch carbon fiber. High-performance pitch carbon fiber has low density, high modulus (up to 930GPa, reaching 91% of the theoretical value), excellent thermal conductivity (thermal conductivity as high as 600-800W/(mK), and is the copper with the best thermal conductivity among metals. 1.5 to 2 times of that), and a small coefficient of thermal expansion. The composite material prepared by using pitch-based carbon fiber to reinforce ABS resin can not only greatly improve the modulus (rigidity) of ABS resin, meet the requirements of thin-walled and lightweight electronic/electrical products, but also can greatly improve ABS resin. thermal conductivity. In addition, due to the extremely low thermal expansion coefficient of pitch-based carbon fiber, it can also improve the dimensional stability of ABS resin products, which is conducive to the manufacture of products with high precision dimensions. The mechanical properties of composite materials are affected by factors such as fiber content and interface; and the improvement of thermal conductivity needs to form more continuous heat conduction paths in the polymer matrix, which is affected by factors such as thermal conductivity, content, and dispersion of the fibers themselves. The inventors Considering these influencing factors comprehensively, the present invention has been completed through a lot of research on the adjustment of the composite process, screw combination and rotation speed, and selection of various auxiliary agents.

Compared with the prior art, the present invention effectively overcomes the shortcomings of the prior art that the mechanical properties and thermal conductivity of the filled ABS resin cannot be balanced, and prepares a carbon fiber reinforced ABS thermoplastic composite material that can simultaneously improve the mechanical properties and thermal conductivity , suitable for the manufacture of thin-walled and lightweight electronic/electrical products, which can greatly expand the application fields of ABS resin materials. Moreover, the raw material cost of the composite material is low, the preparation process is simple, and it is suitable for industrial continuous production.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments.

The ABS resin used in Examples and Comparative Examples has a density of 1.07g/cm ³ , a melt index MFR=3g/10min, a flexural modulus of 2.3GPa, a flexural strength of 58MPa, and a thermal conductivity of 0.17W/(mK). Maleic anhydride grafted ABS is a commercially available product, the carbon fiber is a high-performance pitch-based carbon fiber, the density is 2.16g/cm ³ , the tensile modulus is 650GPa, the tensile strength is 2.1GPa, and the thermal conductivity is 350W/(mK) . Before processing, both the carbon fiber and the resin are continuously air-dried at 90° C. for 4 hours, so that the water content is less than 0.02 wt%.

The mechanical properties were measured with a universal electronic tensile machine, and the thermal conductivity was measured with a laser flash thermal conductivity measuring instrument. The fiber length is calculated by counting the lengths of 500-600 fibers after thermal decomposition and taking the average value.

Example 1

Take by weight 90 parts of content ABS resin, 10 parts of maleic anhydride grafted ABS, 10 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and aluminum oxide, weight ratio 1: 3: 1), coupling agent (γ -Aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, weight ratio 1:1) 0.5 parts, antioxidant (tetrakis[β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester) 0.2 part and lubricant 0 part batching; ABS resin, maleic anhydride grafted ABS resin, inorganic filler, coupling agent, antioxidant and lubricant etc. are put into high-speed mixing Mix evenly in the machine at high speed, feed to the hopper of the extruder, add carbon fiber at the fiber feeding port of the extruder, control the temperature of each zone from the feeding port to the die head of the extruder to be 150°C, 175°C, 185°C, 195°C °C, 195 °C, 200 °C, the speed of the main machine is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

The average length of the carbon fiber in the sample of this embodiment is 485 μm, and the properties of the composite material are respectively: flexural modulus 9.3 GPa, flexural strength 95 MPa, thermal conductivity 2.2 W/(mK). The flexural modulus, strength and thermal conductivity are respectively 4.0 times, 1.6 times and 12.9 times that of pure ABS resin materials, and the rigidity and heat dissipation performance are significantly improved, which meets the requirements of thin-walled and lightweight electronic/electrical product molding and processing. Greatly expand the application field of ABS resin. Moreover, the preparation process of the composite material is simple, the extrusion process is continuous and stable, and is suitable for industrial continuous production.

Example 2

Take by weight 90 parts of content ABS resin, 10 parts of maleic anhydride grafted ABS, 80 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and aluminum oxide, weight ratio 1: 3: 1), coupling agent (γ -Aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, weight ratio 1:1) 5 parts, antioxidant (tetrakis[β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester) 1 part and lubricant (ethylene bisfatty acid amide) 3 parts of ingredients; ABS resin, maleic anhydride grafted ABS resin, inorganic filler, coupling agent, antioxidant and lubricants are put into the high-speed mixer and mixed evenly at high speed, and the material is fed to the hopper of the extruder, and the carbon fiber is added at the fiber feeding port of the extruder. 175°C, 185°C, 195°C, 195°C, 200°C, the speed of the main engine is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

The average length of the carbon fiber in the sample of this embodiment is 102 μm, and the properties of the composite material are respectively: flexural modulus 31.5 GPa, flexural strength 260 MPa, thermal conductivity 3.4 W/(mK). The flexural modulus, strength and thermal conductivity are respectively 13.7 times, 4.5 times and 20.0 times that of pure ABS resin, and the rigidity and heat dissipation performance are significantly improved, meeting the requirements of thin-walled and lightweight electronic/electrical product molding and processing, and can be extremely Greatly expand the application field of ABS resin. Moreover, the preparation process of the composite material is simple, the extrusion process is continuous and stable, and is suitable for industrial continuous production.

Example 3

Take by weight 90 parts of content ABS resin, 10 parts of maleic anhydride grafted ABS, 40 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and aluminum oxide, weight ratio 1: 3: 1), coupling agent (γ -Aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, weight ratio 1:1) 2 parts, antioxidant (tetrakis[β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester) 0.6 part and lubricant (ethylene bis fatty acid amide) 1 part batching; ABS resin, maleic anhydride grafted ABS resin, inorganic filler, coupling agent, antioxidant and lubricants are put into the high-speed mixer and mixed evenly at high speed, and the material is fed to the hopper of the extruder, and the carbon fiber is added at the fiber feeding port of the extruder. 175°C, 185°C, 195°C, 195°C, 200°C, the speed of the main engine is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

The average length of the carbon fiber in the sample of this embodiment is 396 μm, and the properties of the composite material are respectively: flexural modulus 16.3 GPa, flexural strength 150 MPa, and thermal conductivity 2.6 W/(mK). The flexural modulus, strength and thermal conductivity are 7.1 times, 2.6 times and 15.3 times that of pure ABS resin, respectively, and the rigidity and heat dissipation performance are significantly improved, meeting the requirements of thin-walled and lightweight electronic/electrical product molding and processing, and can be extremely Greatly expand the application field of ABS resin. Moreover, the preparation process of the composite material is simple, the extrusion process is continuous and stable, and is suitable for industrial continuous production.

Example 4

Take by weight 90 parts of content ABS resin, 10 parts of maleic anhydride grafted ABS, 40 parts of carbon fiber, 20 parts of inorganic filler (talcum powder, magnesium oxide and aluminum oxide, weight ratio 1: 3: 1), coupling agent (γ -Aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, weight ratio 1:1) 2 parts, antioxidant (N, N'-bis-(3-(3,5 -di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine) 0.6 part and lubricant (silicone powder) 1 part of ingredients; ABS resin, maleic anhydride grafted ABS resin, inorganic filler, coupling The additives, antioxidants and lubricants are put into the high-speed mixer and mixed evenly at high speed, and the material is fed to the hopper of the extruder. The carbon fiber is added at the fiber feeding port of the extruder, and the temperature of each zone from the feeding port to the die head of the extruder is controlled. 150°C, 175°C, 185°C, 195°C, 195°C, 200°C respectively, the main engine speed is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

The average length of the carbon fiber in the sample of this embodiment is 324 μm, and the properties of the composite material are respectively: flexural modulus of 17.1 GPa, flexural strength of 163 MPa, and thermal conductivity of 2.9 W/(mK). The flexural modulus, strength and thermal conductivity are 7.4 times, 2.8 times and 17.1 times that of pure ABS resin, respectively, and the rigidity and heat dissipation performance are significantly improved, meeting the requirements of thin-walled and lightweight electronic/electrical product molding and processing, and can be extremely Greatly expand the application field of ABS resin. Moreover, the preparation process of the composite material is simple, the extrusion process is continuous and stable, and is suitable for industrial continuous production.

Example 5

Take by weight 90 parts of content ABS resin, 10 parts of maleic anhydride grafted ABS, 40 parts of carbon fiber, 15 parts of inorganic filler (talcum powder, magnesium oxide and aluminum oxide, weight ratio 1: 3: 1), coupling agent (γ -Aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, weight ratio 1:1) 2 parts, antioxidant (N, N'-bis-(3-(3,5 -di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine) 0.6 part and lubricant (silicone powder) 1 part of ingredients; ABS resin, maleic anhydride grafted ABS resin, inorganic filler, coupling The additives, antioxidants and lubricants are put into the high-speed mixer and mixed evenly at high speed, and the material is fed to the hopper of the extruder. The carbon fiber is added at the fiber feeding port of the extruder, and the temperature of each zone from the feeding port to the die head of the extruder is controlled. 150°C, 175°C, 185°C, 195°C, 195°C, 200°C respectively, the main engine speed is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

The average length of the carbon fiber in the sample of this embodiment is 338 μm, and the properties of the composite material are respectively: flexural modulus of 16.8 GPa, flexural strength of 159 MPa, and thermal conductivity of 2.7 W/(mK). The flexural modulus, strength and thermal conductivity are 7.3 times, 2.7 times and 15.9 times that of pure ABS resin, respectively, and the rigidity and heat dissipation performance are significantly improved, meeting the requirements of thin-walled and lightweight electronic/electrical product molding and processing, and can be extremely Greatly expand the application field of ABS resin. Moreover, the preparation process of the composite material is simple, the extrusion process is continuous and stable, and is suitable for industrial continuous production.

Comparative example 1

The carbon fiber content in the composition of the composite material is 5 parts, and other compositions and preparation methods are the same as in Example 1.

The average length of the carbon fibers in the prepared composite material sample is 602 μm, and the properties of the composite material are: flexural modulus 7.3 GPa, flexural strength 78 MPa, and thermal conductivity 0.52 W/(mK). The flexural modulus, strength and thermal conductivity are 3.2 times, 1.3 and 3.1 times that of pure ABS resin, respectively. Compared with Example 1, the amount of carbon fiber added in this ratio is too low to strengthen the ABS resin, and cannot form a heat conduction path in the ABS resin matrix, so the rigidity and heat dissipation performance of the material are not significantly improved.

Comparative example 2

The carbon fiber content in the composition of the composite material is 100 parts, and other compositions and preparation methods are the same as in Example 1.

The average length of the carbon fibers in the prepared composite sample is 73 μm, and the properties of the composite are: flexural modulus 34.2 GPa, flexural strength 252 MPa, and thermal conductivity 2.4 W/(mK). The flexural modulus, strength and thermal conductivity are 14.9 times, 4.3 times and 14.1 times of pure ABS resin respectively. Compared with Example 2, although the addition amount of carbon fiber is increased in this ratio, the modulus is slightly increased, but the strength and thermal conductivity are decreased instead. This may be caused by the high viscosity of the matrix and the poor dispersion of carbon fibers. Since carbon fiber is more expensive than ABS resin, an increase in the amount of carbon fiber will also lead to an increase in the cost of composite materials.

Comparative example 3

The coupling agent content in the composition of the composite material is 0, and other compositions and preparation methods are the same as in Example 5.

The average length of the carbon fibers in the prepared composite sample is 421 μm, and the properties of the composite are: flexural modulus 11.1 GPa, flexural strength 108 MPa, and thermal conductivity 0.36 W/(mK). The flexural modulus, strength and thermal conductivity are 4.8 times, 1.9 times and 2.1 times of pure ABS resin respectively. Compared with Example 5, no coupling agent is added in this example, so the interfacial bonding between the fiber and the resin matrix is poor, which will also lead to poor fiber dispersion, and it is difficult to form a heat conduction path inside the material, so the strength and modulus of ABS resin and thermal performance were not significantly improved.

Comparative example 4

The content of ABS resin in the composition of the composite material is 100 parts, the content of maleic anhydride grafted ABS is 0, and other compositions and preparation methods are the same as in Example 5.

The average length of the carbon fiber in the prepared composite material sample is 447 μm, and the properties of the composite material are: flexural modulus 6.3 GPa, flexural strength 80 MPa, thermal conductivity 0.25 W/(mK). The flexural modulus, strength and thermal conductivity are 2.7 times, 1.4 times and 1.5 times of pure ABS resin respectively. Compared with Example 5, although a coupling agent is added in this example, maleic anhydride grafted ABS is not added in the matrix resin, so the interfacial bonding between the fiber and the resin matrix is poor, and it will also lead to poor fiber dispersion, which is difficult in The heat conduction path is formed inside the material, so the strength, modulus and heat dissipation performance of ABS resin are not significantly improved.

Comparative Example 5

In the composition of the composite material, the content of ABS resin is 100 parts, the content of maleic anhydride grafted ABS is 0, the content of coupling agent is 0, and other compositions and preparation methods are the same as in Example 5.

The average length of the carbon fibers in the prepared composite material sample is 416 μm, and the properties of the composite material are: flexural modulus 5.6 GPa, flexural strength 71 MPa, and thermal conductivity 0.23 W/(mK). The flexural modulus, strength and thermal conductivity are 2.4 times, 1.2 times and 1.4 times of pure ABS resin respectively. Compared with Example 5, neither coupling agent nor maleic anhydride grafted ABS was added in this example, which resulted in extremely poor interfacial bonding between the fiber and the resin matrix, and seriously affected the dispersion of the carbon fiber, making it difficult to add carbon fiber to the material. A heat conduction path is formed inside, so the strength, modulus and heat dissipation performance of ABS resin are not significantly improved.

The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these examples will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other examples without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity, characterized in that the composite material is made up of the following materials in parts by weight: 90 parts of ABS resin, 10 parts of maleic anhydride grafted ABS, 10 to 80 parts of carbon fiber, inorganic 10-20 parts of filler, 0.5-5 parts of coupling agent, 0.2-1 part of antioxidant and 0-3 parts of lubricant. 2. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 1, wherein said ABS resin is selected from extrusion grade, injection molding grade, filling grade or flame retardant grade pellets or One of the powders. 3. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 1, wherein said carbon fiber is a high-performance material with a thermal conductivity greater than 200W/(mK) and a tensile modulus greater than 700GPa. Pitch-based carbon fibers. 4. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 1, characterized in that said carbon fibers are chopped carbon fibers with an average length of 10 μm to 2 mm. 5. the excellent carbon fiber reinforced ABS resin composite material of a kind of thermal conductivity according to claim 1, is characterized in that, described inorganic filler is selected from talcum powder, glass microsphere, calcium carbonate, barium sulfate, magnesium oxide, sulfuric acid One or more of calcium, silica lime, mica powder, diatomaceous earth or montmorillonite. 6. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 1, wherein the coupling agent is selected from vinyltriethoxysilane, γ-aminopropyltriethoxy γ-aminopropyltrimethoxysilane, γ-propylmethacrylate silane, γ-glycidyl etheroxypropyltrimethoxysilane, tetraisopropyl orthotitanate, isopropyl triisodecyl One or more of octaacyl titanate or polyester-modified polydimethylsiloxane. 7. A carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 1, wherein the antioxidant is selected from the group consisting of tetrakis[β-(3,5-di-tert-butyl-4- Hydroxyphenyl)propionate]pentaerythritol, N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine or tris[2,4-di One or more of tert-butylphenyl] phosphite; The lubricant is selected from one or more of ethylene bis fatty acid amide, ethylene-acrylic acid copolymer or silicone powder. 8. A method for preparing a carbon fiber reinforced ABS resin composite material with excellent thermal conductivity as claimed in claim 1, comprising the following steps: (1) fully drying raw material carbon fiber, ABS resin and maleic anhydride grafted ABS; (2) taking each component raw material according to the proportioning ratio; (3) High-speed mixing of raw materials of each component except carbon fiber; (4) Put the mixed material obtained in step (3) into the hopper of the twin-screw extruder, add carbon fiber at the fiberizing port of the extruder, and extrude to pelletize. 9. A method for preparing a carbon fiber-reinforced ABS resin composite material with excellent thermal conductivity according to claim 8, characterized in that, the drying condition in step (1) is blast drying at 70 to 90° C. ~6 hours, the moisture content before processing must be less than 0.02wt%. 10. The preparation method of a carbon fiber reinforced ABS resin composite material with excellent thermal conductivity according to claim 8, characterized in that, the twin-screw extruder described in the step (4) is from the feed port to the extruder The temperature settings of the six zones of the die head are 150°C, 175°C, 185°C, 195°C, 195°C, and 200°C respectively, and the speed of the main machine is 20-50 Hz.