Anti-static ppe material and its production process

Abstract

The application relates to the technical field of high polymer materials, and discloses an antistatic PPE material and a production process thereof. The antistatic PPE material comprises the following raw materials in parts by weight: PPE resin 40-60 parts, polystyrene 15-25 parts, polyphenylene sulfide 8-12 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 3-8 parts, modified conductive carbon black 6-10 parts, antioxidant 1-2 parts, and lubricant 0.5-1.5 parts. The material is different from traditional antistatic materials in that small-molecule antistatic agents or a large amount of conductive fillers are used to improve the antistatic performance of the material, and the modified conductive carbon black is used to improve the antistatic performance of the PPE material. The PEE can obtain excellent antistatic performance only by adding relatively less modified conductive carbon black.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to an anti-static PPE material and a production process thereof. BACKGROUND

[0002] Polyphenylene ether (PPE), also known as polyphenylene oxide (PPO), is a thermoplastic engineering plastic with excellent performance. Its molecular chain is composed of aromatic rings and ether bonds, which endows it with a series of excellent properties, such as excellent heat resistance, good mechanical properties, dimensional stability and hydrolysis resistance. However, the extremely high volume resistivity (>10 16 Ω·cm) also brings significant challenges. In actual use, PPE products are prone to generate and accumulate static electricity due to friction and separation, which affects product cleanliness, especially in fields such as semiconductors, liquid crystal display panels and medical equipment, which have extremely high cleanliness requirements.

[0003] To improve the anti-static performance of PPE materials, the following methods are generally used to improve the anti-static performance, but they all have different degrees of limitations, such as: (1) adding small molecule anti-static agents, but the effect is highly dependent on environmental humidity, which is easily lost due to migration, volatilization and wiping, and the anti-static performance rapidly decays over time; (2) blending and adding conductive fillers, which usually require a high filling amount to form a continuous conductive network, which will seriously damage the excellent mechanical properties of PPE (resulting in brittle materials), worsen the processing flowability, and greatly increase the material cost and density, and nano-scale fillers (such as carbon black) are prone to agglomeration and difficult to disperse uniformly in the PPE matrix, resulting in unstable and poor reproducible conductive performance. Therefore, the traditional technology cannot make PPE materials have excellent and stable anti-static performance at a low addition amount. SUMMARY

[0004] To solve the above technical problems, the present application provides an anti-static PPE material and a production process thereof.

[0005] The object of the present application can be achieved by the following technical solutions:

[0006] An anti-static PPE material, comprising the following raw materials by weight: PPE resin 40-60 parts, polystyrene 15-25 parts, polyphenylene sulfide 8-12 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 3-8 parts, modified conductive carbon black 6-10 parts, antioxidant 1-2 parts, and lubricant 0.5-1.5 parts.

[0007] The modified conductive carbon black is prepared by the following steps:

[0008] Step A1, take the nitric acid treatment of carbon black into toluene, and ultrasonic dispersion for 40 min, then drop 3-aminopropyl trimethoxysilane, stir evenly, then transfer to the oil bath pot, condense reflux reaction at 80℃ for 12h, rotary evaporation, washing, suction filtration, vacuum drying, the amino carbon black is obtained;

[0009] Further, in step A1, the amount ratio of nitric acid treatment of carbon black, toluene and 3-aminopropyl trimethoxysilane is 5g:100mL:0.1-0.4g;

[0010] Further, in step A1, the nitric acid treatment of carbon black is prepared by the following steps: 10g N115 carbon black is mixed with 50mL, 40wt% nitric acid solution, stirring evenly, then heated to 70℃ for 30min, then 1-3g sodium dodecyl benzene sulfonate is added and continue to stir for 1-2h, vacuum distillation, washing to pH 5.5-6.5, drying, the nitric acid treatment of carbon black is obtained;

[0011] Further, the drying of the nitric acid treatment of carbon black is two stages, the first stage: drying at 80℃ hot air for 2h, the second stage: drying at 120℃ under vacuum for 3h;

[0012] Step A2, the amino carbon black is mixed evenly in N,N-dimethylformamide, then maleic anhydride is added and ultrasonic dispersion for 30min, then anhydrous sodium acetate is added and heated to 50-70℃ for 3-5h, vacuum distillation, washing, drying, the end double bond modified carbon black is obtained;

[0013] Further, in step A2, the molar ratio of the surface amino content of the amino carbon black and maleic anhydride is 1:1.05;

[0014] Further, in step A2, the anhydrous sodium acetate is 0.5wt%-1wt% of the amount of maleic anhydride;

[0015] Step A3, the end double bond modified carbon black is ultrasonic dispersion evenly in water, then acrylamide, acrylic acid and sodium p-styrenesulfonate are added and stirred evenly, then nitrogen is introduced for 20min, and heated to 40-50℃, then potassium persulfate is added and stirred for 5-6h, washing, drying, the hyperbranched modified carbon black is obtained;

[0016] Further, in step A3, the end double bond modified carbon black is 0.5wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate;

[0017] Further, in step A3, the potassium persulfate is 0.2wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate;

[0018] Further, the mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate in step A3 is 2-6:3-5:1-3, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and end double bond modified carbon black accounts for 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, end double bond modified carbon black, water and potassium persulfate;

[0019] Step A4, the hyperbranched modified carbon black is uniformly dispersed in N,N-dimethylformamide by ultrasonic, 0.3mol / L silver nitrate solution is added, the pH of the system is adjusted to 10.5-11, 80wt% hydrazine hydrate is added after stirring for 30min, stirring at 40℃ for 45-65min, filtering, washing and drying, to obtain modified conductive carbon black;

[0020] Further, the amount ratio of hyperbranched modified carbon black, N,N-dimethylformamide, silver nitrate solution and hydrazine hydrate in step A4 is 3-6g:200mL:100mL:60-80mL.

[0021] A production process of an anti-static PPE material comprises the following steps:

[0022] Step S1, the raw materials are weighed by weight parts, the PPE resin, polystyrene and polyphenylene sulfide are uniformly mixed to obtain a premix;

[0023] Step S2, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black, antioxidant and lubricant are added to the premix and stirred uniformly, then transferred to a twin-screw extruder for melt blending, extrusion, cooling, granulation and drying to obtain an anti-static PPE material;

[0024] Further, the processing temperature in the twin-screw extruder in step S2 is 245-275℃, and the screw rotation speed is 80-120rpm / min.

[0025] The beneficial effects of the present application are:

[0026] The anti-static PPE material of the present application is different from the traditional anti-static material which uses small molecule antistatic agent or adds a large amount of conductive filler to improve the antistatic performance of the material. The modified conductive carbon black is used to improve the antistatic performance of the PPE material. Only a relatively small amount of modified conductive carbon black is needed to make PEE have excellent antistatic performance, and it is not easy to migrate, precipitate or be wiped off like small molecule antistatic agents, so the antistatic performance is long-lasting.

[0027] Compared with the traditional conductive carbon black, the modified conductive carbon black has a core-shell structure and a relatively small amount, but can significantly improve the conductivity and antistatic performance of the substrate, because the modified conductive carbon black does not rely on a single conductive mechanism, but through the electronic conductivity of the carbon black core layer, the ion conductivity of the hyperbranched structure shell layer and the electronic conductivity of the nano-silver, and then builds a high-efficiency and stable three-dimensional conductive network structure in the substrate.

[0028] In the modified conductive carbon black of the application, firstly, the carbon black itself has excellent conductivity, which acts as the main electronic conduction path and network "anchor point" in the conductive network. Secondly, the three-dimensional structure of the hyperbranched structure forms a soft shell layer outside the carbon black particles, which can effectively prevent the tight agglomeration of the inner core carbon black particles in the PEE matrix, so that they can be more uniformly dispersed, and because the shell layer has a large volume, the modified carbon black particles physically occupy more space, and the particles are more likely to approach or even contact each other, so that a continuous conductive network can be formed under the condition of low addition amount; the strong water-soluble sodium sulfonate groups and carboxylate groups provided by the shell layer hyperbranched structure are strongly polar, can absorb water molecules (hygroscopicity) in the surrounding air of the material, and the absorbed water molecules can form a hydration layer on the surface of the shell layer, so that the sodium ions become free to move in the hydration layer, thereby forming an ion conduction path, when static electricity is generated on the surface of the material due to friction or other reasons, these movable ions can migrate directionally, neutralize the charge, and thus eliminate static electricity. Finally, the large amount of carboxyl groups in the hyperbranched structure can also act as adsorption sites for silver ions, so that nano-silver can be introduced into the shell layer structure during the subsequent reduction process, when two modified carbon black particles approach each other in the PEE matrix, the nano-silver particles on their shell layers may directly contact to form a micro "silver bridge", which is like "spot welding" on the key nodes of the carbon black network, further improving the conductivity of the substrate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be described below in a clear and complete manner. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0030] Example 1: The nitric acid treated carbon black was prepared by the following steps: 10 g of N115 carbon black was mixed with 50 mL of 40 wt% nitric acid solution and stirred uniformly, then the temperature was raised to 70°C and stirred for 30 min, then 1 g of sodium dodecyl benzene sulfonate was added and stirred for 1 h, distilled under reduced pressure, washed to pH 5.5, dried under hot air at 80°C for 2 h, then dried under vacuum at 120°C for 3 h, to obtain the nitric acid treated carbon black.

[0031] The modified conductive carbon black was prepared by the following steps:

[0032] Step A1, 5 g of nitric acid treated carbon black was added to 100 mL of toluene and ultrasonically dispersed for 40 min, then 0.1 g of 3-aminopropyltrimethoxysilane was added and stirred uniformly, then transferred to an oil bath kettle and refluxed at 80°C for 12 h, rotary evaporated, washed, filtered and dried under vacuum, to obtain the aminated carbon black;

[0033] Step A2, the aminated carbon black was mixed uniformly in N,N-dimethylformamide, 0.1 g of maleic anhydride was added and ultrasonically dispersed for 30 min, then 0.5 g of anhydrous sodium acetate was added and stirred at 50°C for 3 h, distilled under reduced pressure, washed and dried, to obtain the terminal double bond modified carbon black, the molar ratio of the amino content on the surface of the aminated carbon black to the maleic anhydride was 1:1.05, and the amount of anhydrous sodium acetate was 0.5 wt% of the amount of maleic anhydride;

[0034] Step A3, the terminal double bond modified carbon black was ultrasonically dispersed uniformly in water, acrylamide, acrylic acid and sodium p-styrenesulfonate were added and stirred uniformly, nitrogen was introduced for 20 min, then the temperature was raised to 40°C, 0.2 g of potassium persulfate was added and stirred for 5 h, washed and dried, to obtain the hyperbranched modified carbon black, the amount of acrylamide, acrylic acid and sodium p-styrenesulfonate was 0.5 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the amount of potassium persulfate was 0.2 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate was 6:3:1, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and the terminal double bond modified carbon black was 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, the terminal double bond modified carbon black, water and potassium persulfate;

[0035] Step A4, 3 g of the hyperbranched modified carbon black was ultrasonically dispersed uniformly in 200 mL of N,N-dimethylformamide, 100 mL of 0.3 mol / L silver nitrate solution was added, then the pH of the system was adjusted to 10.5, 60 mL of 80 wt% hydrazine hydrate was added after stirring for 30 min, stirred at 40°C for 45 min, filtered, washed and dried, to obtain the modified conductive carbon black.

[0036] Example 2: The nitric acid treated carbon black was prepared by the following steps: 10 g of N115 carbon black was mixed with 50 mL of 40 wt% nitric acid solution and stirred uniformly, then the temperature was raised to 70°C and stirred for 30 min, then 2 g of sodium dodecyl benzene sulfonate was added and stirred for 1.5 h, distilled under reduced pressure, washed to pH 6, dried under hot air at 80°C for 2 h, then dried under vacuum at 120°C for 3 h, to obtain the nitric acid treated carbon black.

[0037] The modified conductive carbon black was prepared by the following steps:

[0038] Step A1, 5 g of nitric acid treated carbon black was added to 100 mL of toluene and ultrasonically dispersed for 40 min, then 0.2 g of 3-aminopropyl trimethoxysilane was added and stirred uniformly, then transferred to an oil bath pot and refluxed at 80°C for 12 h, rotary evaporated, washed, filtered and dried under vacuum, to obtain the aminated carbon black;

[0039] Step A2, the aminated carbon black was mixed uniformly in N,N-dimethylformamide, then maleic anhydride was added and ultrasonically dispersed for 30 min, then anhydrous sodium acetate was added and the temperature was raised to 60°C and stirred for 4 h, distilled under reduced pressure, washed and dried, to obtain the terminal double bond modified carbon black, the molar ratio of the amino content on the surface of the aminated carbon black to the maleic anhydride was 1:1.05, and the amount of anhydrous sodium acetate was 0.8 wt% of the amount of maleic anhydride;

[0040] Step A3, the terminal double bond modified carbon black was ultrasonically dispersed uniformly in water, then acrylamide, acrylic acid and sodium p-styrenesulfonate were added and stirred uniformly, nitrogen was introduced for 20 min, then the temperature was raised to 45°C and potassium persulfate was added and stirred for 5.5 h, washed and dried, to obtain the hyperbranched modified carbon black, the amount of the terminal double bond modified carbon black was 0.5 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the amount of potassium persulfate was 0.2 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate was 4:4:2, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and the terminal double bond modified carbon black accounted for 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, the terminal double bond modified carbon black, water and potassium persulfate;

[0041] Step A4, 4.5 g of the hyperbranched modified carbon black was ultrasonically dispersed uniformly in 200 mL of N,N-dimethylformamide, then 100 mL of 0.3 mol / L silver nitrate solution was added, the pH of the system was adjusted to 10.8, stirred for 30 min, then 70 mL of 80 wt% hydrazine hydrate was added, stirred at 40°C for 55 min, filtered, washed and dried, to obtain the modified conductive carbon black.

[0042] Example 3: The nitric acid treated carbon black is prepared by the following steps: 10 g of N115 carbon black is mixed with 50 mL of 40 wt% nitric acid solution and stirred uniformly, then heated to 70°C and stirred for 30 min, then 3 g of sodium dodecyl benzene sulfonate is added and stirred for 2 h, distilled under reduced pressure, washed to pH 6.5, dried under hot air at 80°C for 2 h, then dried under vacuum at 120°C for 3 h, to obtain the nitric acid treated carbon black.

[0043] The modified conductive carbon black is prepared by the following steps:

[0044] Step A1: 5 g of nitric acid treated carbon black is added to 100 mL of toluene and ultrasonically dispersed for 40 min, then 0.4 g of 3-aminopropyltrimethoxysilane is added and stirred uniformly, then transferred to an oil bath and refluxed at 80°C for 12 h, rotary evaporated, washed, filtered and dried, to obtain the aminated carbon black;

[0045] Step A2: The aminated carbon black is mixed uniformly in N,N-dimethylformamide, then maleic anhydride is added and ultrasonically dispersed for 30 min, then anhydrous sodium acetate is added and heated to 70°C and stirred for 5 h, distilled under reduced pressure, washed and dried, to obtain the terminal double bond modified carbon black, the molar ratio of the amino content on the surface of the aminated carbon black to the maleic anhydride is 1:1.05, and the amount of anhydrous sodium acetate is 1 wt% of the amount of maleic anhydride;

[0046] Step A3: The terminal double bond modified carbon black is ultrasonically dispersed uniformly in water, then acrylamide, acrylic acid and sodium p-styrenesulfonate are added and stirred uniformly, nitrogen is introduced for 20 min, then heated to 50°C, then potassium persulfate is added and stirred for 6 h, washed and dried, to obtain the hyperbranched modified carbon black, the amount of the terminal double bond modified carbon black is 0.5 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the amount of potassium persulfate is 0.2 wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, the mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate is 2:5:3, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and the terminal double bond modified carbon black accounts for 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, the terminal double bond modified carbon black, water and potassium persulfate;

[0047] Step A4: 6 g of the hyperbranched modified carbon black is ultrasonically dispersed uniformly in 200 mL of N,N-dimethylformamide, then 100 mL of 0.3 mol / L silver nitrate solution is added, then the pH of the system is adjusted to 11, stirred for 30 min, then 80 mL of 80 wt% hydrazine hydrate is added, stirred at 40°C for 65 min, filtered, washed and dried, to obtain the modified conductive carbon black.

[0048] Example 4: A production process of an anti-static PPE material includes the following steps:

[0049] PPE resin 40 parts, polystyrene 15 parts, polyphenylene sulfide 8 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 3 parts, modified conductive carbon black prepared in Example 1 6 parts, antioxidant 1010 1 part, polyethylene wax 0.5 part;

[0050] Step S1, weigh the raw materials according to the weight parts, mix the PPE resin, polystyrene and polyphenylene sulfide uniformly, and obtain the premix;

[0051] Step S2, add acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black prepared in Example 1, antioxidant 1010 and polyethylene wax to the premix and stir uniformly, then transfer to a twin-screw extruder for melt blending, extrusion, cooling, granulation and drying, and obtain the antistatic PPE material. The processing temperature in the twin-screw extruder is 245°C, and the screw rotation speed is 80 rpm / min.

[0052] Example 5: A production process of an antistatic PPE material includes the following steps:

[0053] PPE resin 50 parts, polystyrene 20 parts, polyphenylene sulfide 10 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 5 parts, modified conductive carbon black prepared in Example 2 8 parts, antioxidant 1010 1.5 parts, polyethylene wax 1 part;

[0054] Step S1, weigh the raw materials according to the weight parts, mix the PPE resin, polystyrene and polyphenylene sulfide uniformly, and obtain the premix;

[0055] Step S2, add acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black prepared in Example 2, antioxidant 1010 and polyethylene wax to the premix and stir uniformly, then transfer to a twin-screw extruder for melt blending, extrusion, cooling, granulation and drying, and obtain the antistatic PPE material. The processing temperature in the twin-screw extruder is 245°C, and the screw rotation speed is 80 rpm / min.

[0056] Example 6: A production process of an antistatic PPE material includes the following steps:

[0057] PPE resin 60 parts, polystyrene 25 parts, polyphenylene sulfide 12 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 8 parts, modified conductive carbon black prepared in Example 3 10 parts, antioxidant 1010 2 parts, polyethylene wax 1.5 parts;

[0058] Step S1, weigh the raw materials according to the weight parts, mix the PPE resin, polystyrene and polyphenylene sulfide uniformly, and obtain the premix;

[0059] Step S2, adding acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black prepared in Example 3, antioxidant 1010 and polyethylene wax into the premix, stirring uniformly, then transferring into a twin-screw extruder for melt blending, extruding, cooling, cutting and drying, thus obtaining the antistatic PPE material, the processing temperature in the twin-screw extruder is 275℃, and the screw rotation speed is 120 rpm / min.

[0060] Comparative Example 1: This comparative example is an antistatic PPE material, which is different from Example 6 in that N115 carbon black is used instead of the modified conductive carbon black prepared in Example 3, and the rest are the same.

[0061] Comparative Example 2: This comparative example is an antistatic PPE material, which is different from Example 6 in that SH-105 antistatic agent is used instead of the modified conductive carbon black prepared in Example 3, and the rest are the same.

[0062] Comparative Example 3: This comparative example is an antistatic PPE material, which is different from Example 6 in that octadecyl diethanolamine is used instead of the modified conductive carbon black prepared in Example 3, and the rest are the same.

[0063] The antistatic PPE materials prepared in Examples 4-6 and Comparative Examples 1-3 are subjected to performance tests:

[0064] Tensile strength test: tested according to GB / T 1040-2006 standard, the tensile rate is 50 mm / min;

[0065] Bending strength test: tested according to the standard specified in ASTM D790;

[0066] Antistatic performance test: tested according to GB / T 1410-2006 standard for surface resistivity;

[0067] The test results are shown in Table 1:

[0068] Table 1: Performance test results

[0069]

[0070] As can be seen from Table 1, the antistatic PPE material prepared in the application has excellent antistatic performance while maintaining good mechanical properties.

[0071] The above content is only an example and description of the concept of the application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific examples, as long as they do not deviate from the scope defined by the concept of the application, which shall belong to the protection scope of the application.

Claims

1. An antistatic PPE material, characterized in that, The raw materials include the following components by weight: PPE resin 40-60 parts, polystyrene 15-25 parts, polyphenylene sulfide 8-12 parts, acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride 3-8 parts, modified conductive carbon black 6-10 parts, antioxidant 1-2 parts, lubricant 0.5-1.5 parts; The modified conductive carbon black is prepared by complexing silver ions with hyperbranched modified carbon black, and then reducing the hyperbranched modified carbon black with hydrazine hydrate to obtain nano-silver, wherein the hyperbranched modified carbon black is prepared by grafting modification of carbon black with acrylamide, acrylic acid and sodium p-styrene sulfonate as monomers, and the carbon black is modified by double bonds at the end; the carbon black with double bonds at the end is prepared by ring-opening reaction of maleic anhydride with aminated carbon black; and the aminated carbon black is prepared by treating carbon black with nitric acid and then treating the carbon black with 3-aminopropyltrimethoxysilane; The modified conductive carbon black is prepared by the following steps: Step A1: The carbon black treated with nitric acid is added to toluene and ultrasonically dispersed for 40 min, then 3-aminopropyltrimethoxysilane is added dropwise and stirred uniformly, and then transferred to an oil bath pot and condensed and refluxed at 80℃ for 12 h, and then rotary evaporated, washed, filtered and vacuum dried to obtain the aminated carbon black. Step A2: The aminated carbon black is mixed uniformly in N,N-dimethylformamide, maleic anhydride is added and ultrasonically dispersed for 30 min, anhydrous sodium acetate is added, and then stirred and reacted at 50-70℃ for 3-5 h, and then distilled under reduced pressure, washed and dried to obtain the carbon black with double bonds at the end. Step A3: The carbon black with double bonds at the end is ultrasonically dispersed in water, acrylamide, acrylic acid and sodium p-styrene sulfonate are added and stirred uniformly, nitrogen is introduced for 20 min, and then heated to 40-50℃, potassium persulfate is added and stirred and reacted for 5-6 h, and then washed and dried to obtain the hyperbranched modified carbon black. Step A4: The hyperbranched modified carbon black is ultrasonically dispersed in N,N-dimethylformamide, 0.3 mol / L silver nitrate solution is added, the pH of the system is adjusted to 10.5-11, stirred for 30 min, 80 wt% hydrazine hydrate is added, stirred at 40℃ for 45-65 min, filtered, washed and dried to obtain the modified conductive carbon black.

2. The anti-static PPE material according to claim 1, wherein, In step A1, the amount ratio of the carbon black treated with nitric acid, toluene and 3-aminopropyltrimethoxysilane is 5g:100mL:0.1-0.4g.

3. The anti-static PPE material as claimed in claim 1, wherein, In step A1, the carbon black treated with nitric acid is prepared by the following steps: 10g of N115 carbon black is mixed and stirred uniformly in 50mL of 40wt% nitric acid solution, heated to 70℃ and stirred for 30 min, 1-3g of sodium dodecyl benzene sulfonate is added and stirred for 1-2 h, distilled under reduced pressure, washed to pH 5.5-6.5, and dried to obtain the carbon black treated with nitric acid.

4. The anti-static PPE material according to claim 3, wherein, The drying of the carbon black treated with nitric acid is in two stages: the first stage is drying at 80℃ under hot air for 2 h, and the second stage is vacuum drying at 120℃ for 3 h.

5. The anti-static PPE material as claimed in claim 1, wherein, In step A2, the molar ratio of the content of amino groups on the surface of the aminated carbon black to maleic anhydride is 1:1.05, and the amount of anhydrous sodium acetate is 0.5wt%-1wt% of the amount of maleic anhydride.

6. The anti-static PPE material as claimed in claim 1, wherein, The end double bond modified carbon black in step A3 is 0.5wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, and potassium persulfate is 0.2wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate.

7. The anti-static PPE material as claimed in claim 1, wherein, The mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate in step A3 is 2-6:3-5:1-3, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and end double bond modified carbon black accounts for 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, end double bond modified carbon black, water and potassium persulfate.

8. The anti-static PPE material as claimed in claim 1, wherein, The dosage ratio of hyperbranched modified carbon black, N,N-dimethylformamide, silver nitrate solution and hydrazine hydrate in step A4 is 3-6g:200mL:100mL:60-80mL.

9. A process for the production of the antistatic PPE material according to any one of claims 1 to 8, characterized in that, The following steps are included: Step S1, weigh the raw materials by weight parts, mix the PPE resin, polystyrene and polyphenylene sulfide uniformly, and obtain the premix; Step S2, add acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black, antioxidant and lubricant into the premix and stir uniformly, then transfer to a twin-screw extruder for melt blending, extrusion, cooling, granulation and drying, and obtain the antistatic PPE material, the processing temperature in the twin-screw extruder is 245-275℃, and the screw rotation speed is 80-120rpm. The end double bond modified carbon black in step A3 is 0.5wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate, and potassium persulfate is 0.2wt% of the total mass of acrylamide, acrylic acid and sodium p-styrenesulfonate. The mass ratio of acrylamide, acrylic acid and sodium p-styrenesulfonate in step A3 is 2-6:3-5:1-3, and the mass of acrylamide, acrylic acid, sodium p-styrenesulfonate and end double bond modified carbon black accounts for 26% of the total mass of acrylamide, acrylic acid, sodium p-styrenesulfonate, end double bond modified carbon black, water and potassium persulfate. The dosage ratio of hyperbranched modified carbon black, N,N-dimethylformamide, silver nitrate solution and hydrazine hydrate in step A4 is 3-6g:200mL:100mL:60-80mL. The following steps are included: Step S1, weigh the raw materials by weight parts, mix the PPE resin, polystyrene and polyphenylene sulfide uniformly, and obtain the premix; Step S2, add acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride, modified conductive carbon black, antioxidant and lubricant into the premix and stir uniformly, then transfer to a twin-screw extruder for melt blending, extrusion, cooling, granulation and drying, and obtain the antistatic PPE material, the processing temperature in the twin-screw extruder is 245-275℃, and the screw rotation speed is 80-120rpm.

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