CN111393789A

CN111393789A - High-heat-dissipation ABS (acrylonitrile butadiene styrene) plastic for household appliance shell and preparation method thereof

Info

Publication number: CN111393789A
Application number: CN202010297030.9A
Authority: CN
Inventors: 张燕丹
Original assignee: Ningbo Free Trade Zone Junyi Auto Parts Technology Co ltd
Current assignee: Ningbo Free Trade Zone Junyi Auto Parts Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-10

Abstract

The invention discloses high-heat-dissipation ABS plastic for a household appliance shell and a preparation method thereof. The paint comprises the following components in parts by weight: 70-120 parts of ABS resin, 0.1-2 parts of heat-conducting filler, 2-4 parts of antioxidant, 5-10 parts of silane coupling agent, 5-15 parts of flame retardant and 0.3-1 part of anti-ultraviolet agent. According to the invention, the heat-conducting filler is a boron nitride multi-walled carbon nanotube hybrid material or a net-shaped boron nitride multi-walled carbon nanotube hybrid material, so that the problem that the heat-conducting property of the ABS plastic is not obviously improved due to the interface thermal resistance and phonon scattering generated between the heat-conducting filler and the heat-conducting filler is effectively solved. Meanwhile, the problem of poor dispersibility of the inorganic/carbon-based heat conduction material in the ABS matrix is solved, good interface combination is formed between the two phases, and the heat conduction performance of the ABS plastic is further improved. The ABS plastic with high heat dissipation performance is prepared, the addition amount of the heat-conducting filler is small, the heat conductivity coefficient is high, the comprehensive performance of the ABS plastic is basically not influenced, and the ABS plastic is very suitable for manufacturing shells of household appliances.

Description

High-heat-dissipation ABS (acrylonitrile butadiene styrene) plastic for household appliance shell and preparation method thereof

Technical Field

The invention belongs to the technical field of plastics, and particularly relates to ABS plastic with high heat dissipation performance.

Background

The ABS plastic is a terpolymer of acrylonitrile, butadiene and styrene, and the addition of the acrylonitrile provides high hardness and strength, heat resistance and corrosion resistance for the ABS; the butadiene endows ABS with high impact resistance, toughness, cold resistance and certain ductility; and the styrene ensures good high surface gloss, easy coloring and easy processing of the ABS. ABS plastic is one of the most widely used engineering thermoplastic plastics with the largest production quantity at present. ABS plastics are widely used for manufacturing shells of household appliances, such as shells of televisions, refrigerators and computers.

Household appliances such as refrigerators, air conditioners and the like which provide cool and refreshing for people in daily life also need to be cooled, and because the household appliances can be burnt and scalded after long-time work, if the heat can not be effectively dissipated, the household appliances can be abnormal or damaged due to overhigh temperature, and the service life and the continuous working time are influenced. Most of the housings of home appliances are made of plastic, which generally has poor heat dissipation performance, for example, the thermal conductivity of ABS plastic is about 0.25W/(m · K). Therefore, some heat dissipation holes need to be reserved in the shell of the household appliance, so that the heat inside the household appliance can be discharged outside in time through the heat dissipation holes. The design of reserving the louvre also can bring harm to household electrical appliances, for example, impurity such as dust, water enters into electrical apparatus through the louvre very easily, leads to household electrical appliances work unusual or damage, influences life.

Therefore, in order to solve the problem of poor heat dissipation due to low thermal conductivity of ABS plastic used for the housing of home appliances, it is necessary to develop a high thermal conductivity ABS plastic having high heat dissipation without affecting other performances.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: the problem of the poor heat dissipation of household electrical appliances shell that makes to prior art ABS plastics provides the high heat dissipation ABS plastics that are used for household electrical appliances shell.

In order to solve the technical problems, the invention adopts the technical scheme that:

the high-heat-dissipation ABS plastic comprises the following components in parts by weight: 70-120 parts of ABS resin, 0.1-2 parts of heat-conducting filler, 2-4 parts of antioxidant, 5-10 parts of silane coupling agent, 5-15 parts of flame retardant and 0.3-1 part of anti-ultraviolet agent.

The heat-conducting filler is a boron nitride multi-walled carbon nanotube hybrid material.

The antioxidant is one or more of hydroquinone, p-phenylenediamine and 2, 6-di-tert-butylphenol.

The silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane.

The flame retardant is antimony trioxide or aluminum tripolyphosphate.

The uvioresistant agent is one or more of 2-hydroxy-4-n-octoxy benzophenone, 3, 5-di-tert-butyl-4-hydroxybenzoic acid n-hexadecyl ester and 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole.

The preparation method of the boron nitride multi-walled carbon nanotube hybrid material comprises the following steps:

s1, placing 0.5-2g of multi-walled carbon nanotubes in mixed acid formed by concentrated sulfuric acid and concentrated nitric acid with the volume ratio (1-3) of the concentrated sulfuric acid to the concentrated nitric acid of 300-1000 m L, oscillating the mixed acid and the concentrated nitric acid for 8-12 h at 30-50 ℃, diluting the mixed acid and the concentrated nitric acid with 500-1500 m L water, filtering the multi-walled carbon nanotubes by using a 0.5-1 mu m porous filter membrane, washing the multi-walled carbon nanotubes to be neutral by using water, and then drying the multi-walled carbon nanotubes in vacuum for 10-30 h at 60-100 ℃ to obtain the acidified multi-walled carbon nanotubes.

S2, uniformly mixing 3-8 g of boron nitride powder and 80-120 g of urea together, and mixing the mixture with stainless steel grinding balls according to the mass ratio of 1: (80-120), performing ball milling at a revolution speed of 200-.

S3 adding 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide 8-12 g, N-hydroxysuccinimide 20-40 g and acidified multi-walled carbon nano-tubes 0.8-1.2 g into water 800-1500 m L, and performing ultrasonic treatment for 1-3 h to obtain the multi-walled carbon nano-tube suspension

And (4) liquid.

S4, adding 3-8 g of amino-functionalized boron nitride into the obtained multi-walled carbon nanotube suspension to form a uniform mixture, reacting for 10-30 h at 0 ℃ in an ice bath under stirring, performing suction filtration, and performing vacuum drying for 3-6 h at 60-80 ℃ to obtain the boron nitride multi-walled carbon nanotube hybrid material.

Boron nitride has the advantages of light weight, low thermal expansion coefficient, good heat resistance, high thermal conductivity of 30-330W/(m K) and the like, and is widely applied to polymer heat conduction modification. However, boron nitride is an inorganic material and has poor compatibility with high polymer materials, and the boron nitride is easily layered after being mixed with the high polymer materials, so that the comprehensive performance of the high polymer materials is seriously influenced.

The multi-wall carbon nanotube is a good heat conduction carbon material, and researches show that the heat conductivity coefficient of a single multi-wall carbon nanotube at room temperature is more than 3000W/(m K), which is far more than the heat conductivity coefficient of some well-known good heat conduction materials. The multi-walled carbon nano-tube has high surface energy and is easy to agglomerate, and the introduction of the nano-grade filler has great influence on the viscosity of the polymer material in the processing process, thereby influencing the dispersion state of the filler in the polymer and further influencing the comprehensive performance of the polymer material.

The polymer material can further improve the heat-conducting property by adding more than two different fillers and utilizing respective advantages of the fillers. But because interface thermal resistance is generated among different fillers, heat conduction is hindered, and the heat conduction performance of the material is reduced. The boron nitride and the multi-walled carbon nanotube are connected through a covalent bond, so that the interface thermal resistance and phonon scattering between the heat-conducting filler and the heat-conducting filler can be effectively reduced, and the heat conductivity coefficient of the high polymer material is improved.

The preparation method of the ABS plastic comprises the following steps:

drying the ABS resin in an oven; preheating a screw cylinder and an injection mold of an injection molding machine; feeding the dried ABS resin into a screw cylinder of an injection molding machine, and heating to a molten state; adding heat-conducting filler, antioxidant, lubricant, silane coupling agent, flame retardant and anti-ultraviolet agent into molten ABS resin, fully and uniformly mixing, spraying into a mold, and cooling the mold to room temperature after completion; and opening the mold to take out the product in the mold, and air-drying and granulating to obtain the ABS plastic.

The drying temperature is 80-85 ℃, and the drying time is 2-4 h.

The rear temperature of the screw cylinder is 180-220 ℃, the middle temperature of the screw cylinder is 190-230 ℃, and the front temperature of the screw cylinder is 190-230 ℃.

The temperature of the mould is 30-70 ℃.

On the basis of the technical scheme, the invention also provides a technical scheme that:

the ABS plastic comprises the following components in parts by weight: 70-120 parts of ABS resin, 0.1-2 parts of heat-conducting filler, 2-4 parts of antioxidant, 5-10 parts of silane coupling agent, 5-15 parts of flame retardant, 0.3-1 part of anti-ultraviolet agent and 1-4 parts of initiator.

The heat-conducting filler is a mesh-boron nitride multi-walled carbon nanotube hybrid material.

The flame retardant is antimony trioxide or aluminum tripolyphosphate.

The initiator is one or more of lauroyl peroxide and dicumyl peroxide.

The preparation method of the reticular-boron nitride multi-walled carbon nanotube hybrid material comprises the following steps:

S3 adding 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide 8-12 g, N-hydroxysuccinimide 20-40 g and acidified multi-walled carbon nano-tubes 0.8-1.2 g into water 800-1500 m L, and carrying out ultrasonic treatment for 1-3 h to obtain the multi-walled carbon nano-tube suspension.

S4, adding 3-8 g of amino-functionalized boron nitride and 3-8 g of triethylene tetramine into the obtained multi-walled carbon nanotube suspension to form a uniform mixture, reacting for 10-30 h at 0 ℃ in an ice bath under stirring, performing suction filtration, and performing vacuum drying for 3-6 h at 60-80 ℃ to obtain the mesh-boron nitride multi-walled carbon nanotube hybrid material.

Amino groups at two ends of each triethylene tetramine molecule and carboxyl on the surface of the multi-wall carbon nano tube are subjected to chemical reaction, so that the multi-wall carbon nano tubes are bridged into a whole through covalent bonds, the triethylene tetramine is just like a line, the multi-wall carbon nano tubes are just like points, and the triethylene tetramine and the multi-wall carbon nano tubes are connected into a net through point lines to form a whole, and heat conduction is facilitated.

The preparation method of the ABS plastic comprises the following steps:

drying the ABS resin in an oven; preheating a screw cylinder and an injection mold of an injection molding machine; feeding the dried ABS resin into a screw cylinder of an injection molding machine, and heating to a molten state; adding heat-conducting filler, initiator, antioxidant, lubricant, silane coupling agent, flame retardant and anti-ultraviolet agent into molten ABS resin, fully and uniformly mixing, spraying into a mold, and cooling the mold to room temperature after completion; and opening the mold to take out the product in the mold, and air-drying and granulating to obtain the ABS plastic.

The drying temperature is 80-85 ℃, and the drying time is 2-4 h.

The temperature of the mould is 30-70 ℃.

The ABS resin is subjected to grafting reaction by adopting a melt grafting method, double bonds in the net-shaped boron nitride multi-walled carbon nanotube hybrid material and double bonds in the ABS can react, a certain promotion effect is achieved on the solidification process of the ABS resin, the net-shaped boron nitride multi-walled carbon nanotube hybrid material is favorably dispersed in the ABS resin matrix, and good interface combination is formed between two phases, so that the boron nitride multi-walled carbon nanotube/ABS resin composite material which is uniformly dispersed and has good interface combination can be obtained, and the improvement of the heat conductivity of the composite material can be better promoted.

The invention has the beneficial effects that:

1. the ABS plastic prepared by the invention has high heat conductivity coefficient and good heat dissipation performance, can obtain higher heat conductivity coefficient under the condition of adding a small amount of heat-conducting filler, and hardly influences the comprehensive performance of the ABS plastic.

2. The boron nitride multi-walled carbon nanotube hybrid material prepared by connecting the boron nitride and the multi-walled carbon nanotube through covalent bonds can effectively reduce the interface thermal resistance and phonon scattering between the heat-conducting filler and the heat-conducting filler, and effectively improve the heat conductivity coefficient of ABS plastic.

3. Through the grafting reaction, the reticular boron nitride multi-walled carbon nanotube hybrid material is connected with ABS through a covalent bond, so that the problem of poor dispersibility of the inorganic/carbon-based heat conduction material in the ABS matrix is solved, good interface combination is formed between two phases, and the improvement of the heat conduction performance of the ABS plastic is further improved.

Detailed Description

In the examples, the sources of the raw materials are as follows:

ABS resin: notched Izod impact Strength (test temperature 23 ℃; test method ISO 180-1A) 19 KJ/m²The brand is Taiwan Qimei, and the brand PO L Y L AC PA-757.

Boron nitride: adopting nano boron nitride; the grain diameter is less than 150 nm, and the CAS number is 10043-11-5; purchase brand, alatin; number B140007.

Multi-walled carbon nanotubes: outer diameter: 4-6 nm, purchase brand, national academy of sciences organic chemistry, ltd, brand TNM 0.

Example 1

The ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 1 part of heat-conducting filler, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant and 0.8 part of uvioresistant agent.

The preparation method of the ABS plastic comprises the following steps:

The drying temperature is 83 ℃, and the drying time is 3 h.

The temperature of the rear part of the screw cylinder is 200 ℃, the temperature of the middle part of the screw cylinder is 210 ℃, and the temperature of the front part of the screw cylinder is 210 ℃.

The temperature of the mould is 50 ℃.

The heat-conducting filler is a boron nitride multi-walled carbon nanotube hybrid material

The antioxidant is hydroquinone.

The silane coupling agent is gamma-aminopropyl triethoxysilane.

The flame retardant is aluminum tripolyphosphate.

The uvioresistant agent is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole.

s1, placing 1g of multi-walled carbon nanotubes in a mixed acid (volume ratio = 3: 1) of concentrated sulfuric acid and concentrated nitric acid of 500 m L, oscillating the mixed acid in ultrasonic waves for l0 h at 40 ℃, then diluting the mixed acid with 1000 m L deionized water, filtering the multi-walled carbon nanotubes with a 0.8-micron porous filter membrane, washing the multi-walled carbon nanotubes with the deionized water to be neutral, and then drying the multi-walled carbon nanotubes in vacuum for 24 h at 80 ℃ to obtain the acidified multi-walled carbon nanotubes.

S2 mixing 5 g of boron nitride powder and 100 g of urea uniformly, and mixing the mixture with stainless steel grinding balls according to a mass ratio of 1: and 100, performing ball milling at a revolution speed of 280 r/min and a rotation speed of 800 r/min for 24 hours by adopting a mode of rotating in the forward direction and the reverse direction for l0 min alternately to obtain the amino functionalized boron nitride.

S3 adding 10 g of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide, 30 g of N-hydroxysuccinimide and 1g of acidified multi-walled carbon nano-tube into 1000 m L deionized water, and carrying out ultrasonic treatment for 2 h to obtain the multi-walled carbon nano-tube suspension.

S4, adding 5 g of amino functionalized boron nitride into the obtained multiwall carbon nanotube suspension to form a uniform mixture, reacting for 24 hours at 0 ℃ in an ice bath under stirring, carrying out suction filtration, and carrying out vacuum drying for 5 hours at 70 ℃ to obtain the boron nitride multiwall carbon nanotube hybrid material.

Example 2

The ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 0.5 part of heat-conducting filler, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant, 0.8 part of anti-ultraviolet agent and 2 parts of initiator.

The preparation method of the ABS plastic comprises the following steps:

The drying temperature is 83 ℃, and the drying time is 3 h.

The temperature of the mould is 50 ℃.

The heat-conducting filler is a net-shaped boron nitride multi-walled carbon nanotube hybrid material

The antioxidant is hydroquinone.

The silane coupling agent is gamma-aminopropyl triethoxysilane.

The flame retardant is aluminum tripolyphosphate.

The uvioresistant agent is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole.

The preparation method of the reticular boron nitride multi-walled carbon nanotube hybrid material comprises the following steps:

S2 mixing 6 g of boron nitride powder and 100 g of urea uniformly, and mixing the mixture with stainless steel grinding balls according to a mass ratio of 1: and 100, performing ball milling at a revolution speed of 280 r/min and a rotation speed of 800 r/min for 24 hours by adopting a mode of rotating in the forward direction and the reverse direction for l0 min alternately to obtain the amino functionalized boron nitride.

S3 adding 10 g of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide, 30 g of N-hydroxysuccinimide and 1g of acidified multi-walled carbon nano-tube into 1000 m L deionized water, and carrying out ultrasonic treatment for 24 h to obtain the multi-walled carbon nano-tube suspension.

S4, adding 5 g of amino functionalized boron nitride and 5 g of triethylene tetramine into the obtained multi-walled carbon nanotube suspension to form a uniform mixture, reacting for 2 h at 0 ℃ in an ice bath under stirring, performing suction filtration, and performing vacuum drying for 5h at 70 ℃ to obtain the mesh-boron nitride multi-walled carbon nanotube hybrid material.

Example 3

In substantial agreement with example 2, the only difference is that:

the ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 1 part of heat-conducting filler, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant, 0.8 part of anti-ultraviolet agent and 2 parts of initiator.

Example 4

In substantial agreement with example 2, the only difference is that:

the ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 1.5 parts of heat-conducting filler, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant, 0.8 part of anti-ultraviolet agent and 2 parts of initiator.

Example 5

In substantial agreement with example 2, the only difference is that:

the ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 2 parts of heat-conducting filler, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant, 0.8 part of anti-ultraviolet agent and 2 parts of initiator.

Comparative example 1

The ABS plastic comprises the following components in parts by weight: 100 parts of ABS resin, 4 parts of antioxidant, 8 parts of silane coupling agent, 10 parts of flame retardant and 0.8 part of uvioresistant agent.

The preparation method of the ABS plastic comprises the following steps:

drying the ABS resin in an oven; preheating a screw cylinder and an injection mold of an injection molding machine; feeding the dried ABS resin into a screw cylinder of an injection molding machine, and heating to a molten state; adding an antioxidant, a lubricant, a silane coupling agent, a flame retardant and an anti-ultraviolet agent into molten ABS resin, fully and uniformly mixing, spraying into a mold, and cooling the mold to room temperature after completion; and opening the mold to take out the product in the mold, and air-drying and granulating to obtain the ABS plastic.

The drying temperature is 83 ℃, and the drying time is 3 h.

The temperature of the mould is 50 ℃.

The antioxidant is hydroquinone.

The silane coupling agent is gamma-aminopropyl triethoxysilane.

The flame retardant is aluminum tripolyphosphate.

The uvioresistant agent is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole.

Comparative example 2

In substantial agreement with example 1, the only difference is that:

the heat conducting filler is boron nitride.

Comparative example 3

In substantial agreement with example 1, the only difference is that:

the heat-conducting filler is a multi-walled carbon nanotube.

Comparative example 5

In substantial agreement with example 1, the only difference is that:

the heat-conducting filler is prepared from boron nitride and multi-walled carbon nanotubes in a mass ratio of 1: 1 are mixed.

Test example 1

Measurement of thermal conductivity coefficient:

the thermal conductivity test adopts an instrument which is a KYRX-II transient rapid hot-wire thermal conductivity tester of Hunan Tan Hunan instruments GmbH, the model of which is KDRX-II, and the test sample is a sheet with the length of 30 mm, the width of 30 mm and the thickness of 2.5 mm, before the test, heat-conducting glue is firstly used for uniformly coating two sides of a sample, the sample is clamped on the upper side and the lower side of a sensor, a certain pressure is applied for fixing, every 5 samples are taken as a group for testing, and the average value is taken as the test result.

The ABS plastics prepared in examples 1-5 and comparative examples 1-4 of the present invention were subjected to notched impact strength test, and the results are shown in Table 1:

table 1:

examples/comparative examples	Thermal conductivity/W/(m.K)
		Example 1	1.04
Example 2	0.62
		Example 3	1.25
Example 4	1.31
		Example 5	1.35
Comparative example 1	0.25
		Comparative example 2	0.51
Comparative example 3	0.57
		Comparative example 4	0.55

As can be seen from Table 1, the thermal conductivity of the ABS plastic is significantly improved by adopting the boron nitride multi-walled carbon nanotube hybrid material as the thermal conductive filler. The reason is that the boron nitride multi-walled carbon nanotube hybrid material connected through covalent bonds effectively reduces the interface thermal resistance and phonon scattering between the heat-conducting filler and the heat-conducting filler, and effectively improves the heat conductivity coefficient of the ABS plastic. The heat-conducting filler is a mesh-boron nitride multi-walled carbon nanotube hybrid material, and the heat conductivity coefficient of the ABS plastic is further remarkably improved. The reason is that the reticular boron nitride multi-walled carbon nanotube hybrid material and the ABS are subjected to graft reaction and are connected through a covalent bond, so that the problem of poor dispersibility of the inorganic/carbon-based heat-conducting material in the ABS matrix is solved, good interface combination is formed between two phases, and the improvement of the heat-conducting property of the ABS plastic is further improved.

Test example 2

Testing the notch impact strength:

and (3) testing the notch impact according to the standard ISO 180-1A by adopting a cantilever beam impact testing method, and automatically calculating the impact strength of the material by using an impact testing machine according to the effective energy absorbed on the unit cross section of the sample strip subjected to load impact fracture. In the impact experiment, at least 10 samples are selected as one group each time, the energy of the highest position of the pendulum bob is 22J, and finally the average value of 10 samples in each group is taken as a test result.

The ABS plastics prepared in examples 2 to 5 of the present invention and comparative example 1 were subjected to notched impact strength test, and the results are shown in Table 2.

Table 2:

examples/comparative examples	Notched impact strength KJ/m of cantilever beam²
		Example 1	18.1
Example 2	19.3
		Example 3	19.1
Example 4	17.8
		Example 5	16.2
Comparative example 1	19.5

As can be seen from Table 1, the addition of a proper amount of the mesh-boron nitride multi-walled carbon nanotube hybrid material hardly affects the impact strength of ABS plastic. The thermal conductivity test data of test example 1 show that the addition of too much mesh-boron nitride multi-walled carbon nanotube hybrid material has no obvious effect on improving the thermal conductivity and can obviously reduce the impact strength. Therefore, the ABS plastic prepared by the invention can achieve better heat-conducting property by only adding a small amount of the reticular boron nitride multi-walled carbon nanotube hybrid material, and hardly influences other comprehensive properties.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The ABS plastic with high heat dissipation performance is characterized by comprising the following components in parts by weight: 70-120 parts of ABS resin, 0.1-2 parts of heat-conducting filler, 2-4 parts of antioxidant, 5-10 parts of silane coupling agent, 5-15 parts of flame retardant and 0.3-1 part of anti-ultraviolet agent;

the antioxidant is one or more of hydroquinone, p-phenylenediamine and 2, 6-di-tert-butylphenol;

the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane;

the flame retardant is antimony trioxide or aluminum tripolyphosphate;

2. The ABS plastic with high heat dissipation performance is characterized by comprising the following components in parts by weight: 70-120 parts of ABS resin, 0.1-2 parts of heat-conducting filler, 2-4 parts of antioxidant, 5-10 parts of silane coupling agent, 5-15 parts of flame retardant, 0.3-1 part of anti-ultraviolet agent and 1-4 parts of initiator;

the flame retardant is antimony trioxide or aluminum tripolyphosphate;

the uvioresistant agent is one or more of 2-hydroxy-4-n-octoxy benzophenone, 3, 5-di-tert-butyl-4-hydroxybenzoic acid n-hexadecyl ester and 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole;

the initiator is one or more of lauroyl peroxide and dicumyl peroxide.

3. The ABS plastic with high heat dissipation performance as claimed in claim 1, wherein the heat conductive filler is a boron nitride multi-walled carbon nanotube hybrid material.

4. The ABS plastic with high heat dissipation performance as claimed in claim 3, wherein the preparation method of the boron nitride multi-walled carbon nanotube hybrid material comprises the following steps:

s1, placing 0.5-2g of multi-walled carbon nanotubes in mixed acid formed by concentrated sulfuric acid and concentrated nitric acid with the volume ratio (1-3) of the concentrated sulfuric acid to the concentrated nitric acid of 1000 m L, oscillating the mixed acid and the concentrated nitric acid for 8-12 h at 30-50 ℃ in ultrasonic waves, diluting the mixed acid and the concentrated nitric acid with 500-1500 m L water, filtering the multi-walled carbon nanotubes by using a 0.5-1 mu m porous filter membrane, washing the multi-walled carbon nanotubes to be neutral by using water, and then drying the multi-walled carbon nanotubes in vacuum at 60-100 ℃ for 10-30 h to obtain the multi-walled carbon nanotubes after acidification treatment;

s2, uniformly mixing 3-8 g of boron nitride powder and 80-120 g of urea together, and mixing the mixture with stainless steel grinding balls according to the mass ratio of 1: (80-120), performing ball milling at a revolution speed of 200-;

s3, adding 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide 8-12 g, N-hydroxysuccinimide 20-40 g and acidified multiwalled carbon nanotubes 0.8-1.2 g into water of 800-1500 m L, and carrying out ultrasonic treatment for 1-3 h to obtain a multiwalled carbon nanotube suspension;

5. The ABS plastic with high heat dissipation performance as claimed in claim 2, wherein the heat conductive filler is a mesh-boron nitride multi-walled carbon nanotube hybrid material.

6. The ABS plastic with high heat dissipation performance as claimed in claim 5, wherein the heat conductive filler is a mesh-boron nitride multi-walled carbon nanotube hybrid material, and the method comprises the following steps:

s2, uniformly mixing 3-8 g of boron nitride powder and 80-120 g of urea together, and mixing the mixture with stainless steel grinding balls according to the mass ratio of 1: 80-120, performing ball milling at a revolution speed of 200-;

s3, adding 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide 8-12 g, N-hydroxysuccinimide 20-40 g and acidified multi-walled carbon nano-tubes 0.8-1.2 g into water 800-1500 m L, and carrying out ultrasonic treatment for 1-3 h to obtain a multi-walled carbon nano-tube suspension;

7. The method for preparing the ABS plastic with high heat dissipation performance as recited in any one of claims 1, 3, and 4, comprising the steps of:

drying the ABS resin in an oven; preheating a screw cylinder and an injection mold of an injection molding machine; feeding the dried ABS resin into a screw cylinder of an injection molding machine, and heating to a molten state; adding heat-conducting filler, antioxidant, lubricant, silane coupling agent, flame retardant and anti-ultraviolet agent into molten ABS resin, fully and uniformly mixing, spraying into a mold, and cooling the mold to room temperature after completion; opening the mold to take out the product in the mold, and air-drying and dicing to obtain the high-heat-dissipation ABS plastic;

the drying temperature is 80-85 ℃, and the drying time is 2-4 h;

the rear temperature of the screw cylinder is 180-220 ℃, the middle temperature of the screw cylinder is 190-230 ℃, and the front temperature of the screw cylinder is 190-230 ℃;

the temperature of the mould is 30-70 ℃.

8. The method for preparing the ABS plastic with high heat dissipation performance as recited in any one of claims 2, 5, and 6, comprising the steps of:

drying the ABS resin in an oven; preheating a screw cylinder and an injection mold of an injection molding machine; feeding the dried ABS resin into a screw cylinder of an injection molding machine, and heating to a molten state; adding heat-conducting filler, initiator, antioxidant, lubricant, silane coupling agent, flame retardant and anti-ultraviolet agent into molten ABS resin, fully and uniformly mixing, spraying into a mold, and cooling the mold to room temperature after completion; opening the mold, taking out the product in the mold, and air-drying and granulating to obtain the ABS plastic;

the drying temperature is 80-85 ℃, and the drying time is 2-4 h;

the temperature of the mould is 30-70 ℃.

9. The ABS plastic with high heat dissipation performance prepared according to any one of claims 1-8, which can be used for manufacturing housings of household appliances.