Flame-retardant antistatic composite material and preparation method thereof

Abstract

The invention discloses a flame-retardant antistatic composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The flame-retardant antistatic composite material comprises the following raw materials in parts by weight: 70-85 parts of PP, 10-15 parts of PE, 2-5 parts of an antistatic agent, 3-5 parts of a compatilizer, 10-15 parts of a modified flame retardant, 3-6 parts of a lubricant and 1-2 parts of an antioxidant. The preparation method of the modified flame retardant comprises the following steps: firstly, enabling tetramethyl tetravinyl cyclotetrasiloxane to react with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a triphosphonate compound, then enabling the triphosphonate compound to react with diethylenetriamine to obtain a bis (triphosphonate) compound, and finally enabling the bis (triphosphonate) compound to react with 1-bromododecane to obtain the modified flame retardant. The flame-retardant antistatic composite material prepared by the invention has excellent flame retardant property and antistatic property.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a flame retardant and antistatic composite material and a preparation method thereof. Background Art

[0002] Polyolefins are widely used in industrial and consumer applications such as chemical equipment, household appliance components, automotive interiors, and packaging materials due to their outstanding properties, including light weight, ease of processing, chemical resistance, and low cost. However, as their application scenarios continue to expand, modern society has placed higher demands on their functionality. On the one hand, the inherent insulating properties of polyolefins prevent static electricity from accumulating and dissipating, easily leading to electrostatic discharge. On the other hand, the material itself is highly flammable, posing a serious safety hazard. Therefore, the development of multifunctional composite materials with both efficient flame retardancy and excellent antistatic properties has become an important research direction for this material.

[0003] Chinese invention patent publication number CN108948477A discloses a composite material of poly(s-triazine) and halogen-free, antistatic, and flame-retardant ultra-high molecular weight polyethylene. The invention discloses an ultra-high molecular weight polyethylene composite material containing poly(s-triazine). The composite material's components, by weight, are: 50-85 parts ultra-high molecular weight polyethylene, 2-20 parts poly(s-triazine) and its derivatives, 5-30 parts polyphosphoamine, 2-30 parts polyhydroxy compound, 0.1-10 parts flow modifier, 0.051 parts nucleating agent, 0.03-5 parts coupling agent, and 0.02-5 parts antioxidant. While the composite material exhibits excellent mechanical properties, its flame retardancy is poor. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a flame retardant and antistatic composite material and a preparation method thereof.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions: A flame retardant and antistatic composite material, comprising the following raw materials in parts by weight: PP (polypropylene): 70-85 parts, PE (polyethylene): 10-15 parts, antistatic agent: 2-5 parts, compatibilizer: 3-5 parts, modified flame retardant: 10-15 parts, lubricant: 3-6 parts, antioxidant: 1-2 parts; The modified flame retardant is prepared by the following method: S1: Tetramethyltetravinylcyclotetrasiloxane reacts with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to form a triphosphonate compound; the reaction equation is as follows: .

[0006] S2: A triphosphonate compound reacts with diethylenetriamine to form a bistriphosphonate compound; the reaction equation is as follows: .

[0007] S3: A bistriphosphonate compound reacts with 1-bromododecane to form a modified flame retardant; the reaction equation is shown below: .

[0008] In step S1, the molar ratio of tetramethyltetravinylcyclotetrasiloxane to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is 1:(3-3.2).

[0009] In step S2, the molar ratio of the triphosphonate compound to diethylenetriamine is 2:(1.0-1.2).

[0010] In step S3, the molar ratio of the bistriphosphonate compound to 1-bromododecane is 1:(3-4).

[0011] The antistatic agent is prepared by the following method: N1: N,N,N,N,-tetracyclyl-4,4-diaminodiphenylmethane reacts with (4-(2-(dimethylamino)ethoxy)phenyl)methanol to form a hydroxy ether compound; the reaction equation is as follows: .

[0012] N2: The hydroxy ether compound reacts with 1-chlorooctadecane to form an antistatic agent; the reaction equation is as follows: .

[0013] In step N1, the molar ratio of N,N,N,N,-tetracyclyl-4,4-diaminodiphenylmethane to (4-(2-(dimethylamino)ethoxy)phenyl)methanol is 1:4.5; in step N2, the molar ratio of the hydroxy ether compound to 1-chlorooctadecane is 1:4.

[0014] The compatibilizer is maleic anhydride grafted polypropylene.

[0015] The lubricant is one of stearamide and oleamide.

[0016] The antioxidant is one of antioxidant 1010 and antioxidant 1076.

[0017] A method for preparing a flame retardant and antistatic composite material comprises the following steps: (1) Weigh by weight: PP: 70-85 parts, PE: 10-15 parts, antistatic agent: 2-5 parts, compatibilizer: 3-5 parts, modified flame retardant: 10-15 parts, lubricant: 3-6 parts, antioxidant: 1-2 parts; (2) PP, PE, antistatic agent, compatibilizer, modified flame retardant, lubricant, and antioxidant are placed in a high-speed mixer, stirred to obtain a mixed material, and extruded and granulated using a twin-screw extruder to obtain a flame-retardant and antistatic composite material.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention include: (1) P in the modified flame retardant prepared by the present invention pyrolyzes to generate free radicals, blocking the combustion chain reaction, and Si promotes the formation of a dense carbon layer, and the synergistic effect achieves a high-efficiency flame retardant effect.

[0019] (2) The antistatic agent prepared by the present invention absorbs charges through quaternary ammonium salts, the conjugated structure enhances the charge transfer capability, and the hydroxyl groups absorb water to provide ion migration channels, thereby improving the antistatic performance through multi-path synergistic effects. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0021] Example 1 Preparation of modified flame retardant: S1: Under nitrogen protection, 600 ml of DMF and 0.3 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide were added to a reaction kettle in sequence. The temperature was raised to 65°C with stirring, and 0.1 mol of tetramethyltetravinylcyclotetrasiloxane was added. The reaction was allowed to proceed for 24 h. The mixture was cooled to room temperature and distilled under reduced pressure at 60°C for 3 h to obtain a triphosphonate compound. Its H NMR spectrum data are as follows: 1 H NMR (300MHz, Chloroform- d) δ 8.27 (dd, J = 7.3, 1.3 Hz, 3H), 8.09 (dd, J = 7.0, 1.5Hz, 3H), 7.95 - 7.88 (m, 3H), 7.72 (td, J = 7.1, 1.2 Hz, 3H), 7.60 (td, J =7.2, 1.4 Hz, 3H), 7.50 - 7.40 (m, 9H), 5.96 - 5.77 (m, 2H), 5.63 (dd, J =10.8, 4.0 Hz, 1H), 2.55 (t, J = 9.1 Hz, 6H), 1.12 (td, J = 9.1, 3.1 Hz, 6H),0.06 (d, J = 0.9 Hz, 12H); S2: Add 600 ml of toluene, 0.04 mol of ZrCl4, 0.1 mol of diethylenetriamine, and 0.2 mol of a triphosphonate compound to a reaction kettle, seal the kettle, and react at 140°C for 8 h. Cool to room temperature, wash with deionized water three times (300 ml each time), and distill under reduced pressure at 60°C for 2 h to obtain a bistriphosphonate compound. Its H NMR spectrum data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 8.27 (dd, J = 7.3, 1.3 Hz, 6H), 8.09 (dd, J = 7.0, 1.5 Hz, 6H), 7.96 - 7.88 (m, 6H), 7.72 (td, J = 7.1, 1.2 Hz, 6H), 7.60 (td, J = 7.2,1.4 Hz, 6H), 7.51 - 7.40 (m, 18H), 4.23 (tt, J = 5.6, 4.8 Hz, 2H), 2.80 -2.65 (m, 12H), 2.55 (t, J = 9.1 Hz, 12H), 1.63 (s, 1H), 1.11 (t, J = 9.1 Hz,12H), 0.95 (t, J = 7.4 Hz, 4H), 0.06 (d, J = 1.5 Hz, 18H), 0.02 (s, 6H); S3: 1200 ml of anhydrous ethanol, 0.1 mol of a bistriphosphonate compound, and 0.5 mol of potassium carbonate were added to a reactor in sequence. The mixture was stirred and heated to 60°C. 0.3 mol of 1-bromododecane was added dropwise over 30 minutes. The mixture was refluxed for 30 hours and cooled to room temperature. 1500 ml of ether was added and stirred to mix. The mixture was washed three times with deionized water (500 ml each time). The mixture was distilled under reduced pressure at 40°C for 1 hour to obtain a modified flame retardant. Its H NMR spectrum data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 8.27 (dd, J = 7.3,1.3 Hz, 6H), 8.09 (dd, J = 7.0, 1.5 Hz, 6H), 7.96 - 7.88 (m, 6H), 7.72 (td, J= 7.1, 1.2 Hz, 6H), 7.60 (td, J = 7.2, 1.4 Hz, 6H), 7.50 - 7.40 (m, 18H), 2.66 - 2.43 (m, 30H), 1.53 - 1.40 (m, 6H), 1.39 - 1.21 (m, 54H), 1.11 (t, J =9.1 Hz, 12H), 0.94 - 0.84 (m, 13H), 0.06 (s, 6H), 0.03 (d, J = 1.5 Hz, 18H).

[0022] Example 2 Preparation of modified flame retardant: S1: Under nitrogen protection, 600 ml of DMF and 0.31 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide were added to a reaction kettle in sequence, and the temperature was raised to 70°C with stirring. 0.1 mol of tetramethyltetravinylcyclotetrasiloxane was added and the reaction was carried out for 22 hours. The mixture was cooled to room temperature and distilled under reduced pressure at 60°C for 3 hours to obtain a triphosphonate compound. S2: Add 600 ml of toluene, 0.04 mol of ZrCl4, 0.11 mol of diethylenetriamine, and 0.2 mol of a triphosphonate compound into a reaction kettle, seal the kettle, react at 150°C for 7 h, cool to room temperature, wash with deionized water three times (300 ml each time), and distill under reduced pressure at 60°C for 2 h to obtain a bistriphosphonate compound; S3: 1200 ml of anhydrous ethanol, 0.1 mol of a bistriphosphonate compound, and 0.5 mol of potassium carbonate were added to a reactor in sequence. The mixture was stirred and heated to 60°C. 0.35 mol of 1-bromododecane was added dropwise over a period of 30 minutes. The mixture was refluxed for 32 hours and cooled to room temperature. 1500 ml of ether was added and stirred to mix. The mixture was washed three times with deionized water (500 ml each time). The organic phase was distilled under reduced pressure at 40°C for 1 hour to obtain a modified flame retardant.

[0023] Example 3 Preparation of modified flame retardant: S1: Under nitrogen protection, 600 ml of DMF and 0.32 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide were added to a reaction kettle in sequence, and the temperature was raised to 80°C with stirring. 0.1 mol of tetramethyltetravinylcyclotetrasiloxane was added and the reaction was carried out for 20 h. The mixture was cooled to room temperature and distilled under reduced pressure at 60°C for 3 h to obtain a triphosphonate compound. S2: Add 600 ml of toluene, 0.04 mol of ZrCl4, 0.12 mol of diethylenetriamine, and 0.2 mol of a triphosphonate compound into a reaction kettle, seal the kettle, react at 160°C for 6 h, cool to room temperature, wash with deionized water three times (300 ml each time), and distill under reduced pressure at 60°C for 2 h to obtain a bistriphosphonate compound; S3: 1200 ml of anhydrous ethanol, 0.1 mol of a bistriphosphonate compound, and 0.5 mol of potassium carbonate were added to a reactor in sequence. The mixture was stirred and heated to 60°C. 0.4 mol of 1-bromododecane was added dropwise over a period of 30 minutes. The mixture was refluxed for 10 hours and cooled to room temperature. 1500 ml of ether was added and stirred to mix. The mixture was washed three times with deionized water (500 ml each time). The organic phase was distilled under reduced pressure at 30°C for 1 hour to obtain a modified flame retardant.

[0024] Example 4 Preparation of antistatic agent: N1: Under nitrogen protection, 800 ml of DMF, 0.1 mol of N,N,N,N,-tetraepoxypropyl-4,4-diaminodiphenylmethane, and 0.45 mol of (4-(2-(dimethylamino)ethoxy)phenyl)methanol were added to a reaction kettle, stirred and dissolved, and the temperature was raised to 80°C. 10 g of 85 wt% phosphoric acid was added and the reaction was carried out for 8 h. The mixture was cooled to room temperature and distilled under reduced pressure at 60°C for 3 h. The mixture was then recrystallized from 300 ml of acetone, filtered, and dried in vacuo at 50°C for 8 h to obtain a hydroxy ether compound. Its H NMR spectrum data are as follows: 1 H NMR (300 MHz, Chloroform- d) δ 7.25 - 7.14 (m, 8H), 7.10 - 6.99 (m, 4H), 6.90 - 6.80 (m,8H), 6.72 - 6.62 (m, 4H), 4.52 (dt, J = 3.2, 0.9 Hz, 8H), 4.15 - 4.07 (m,10H), 4.01 (dtd, J = 11.5, 6.1, 5.4 Hz, 4H), 3.82 (dd, J = 11.6, 5.4 Hz, 4H), 3.73 (d, J = 6.4 Hz, 4H), 3.62 - 3.45 (m, 8H), 3.25 (dd, J = 12.4, 6.0 Hz, 4H), 2.96 (t, J = 6.5 Hz, 8H), 2.38 (s, 24H); N2: Under nitrogen protection, 2000 ml of anhydrous ethanol and 0.1 mol of the hydroxy ether compound were added to a reactor. The temperature was raised to 60°C with stirring, and 0.41 mol of 1-chlorooctadecane was added dropwise over 30 minutes. The reaction was refluxed for 18 hours, cooled to room temperature, and distilled under reduced pressure at 40°C for 3 hours. The mixture was recrystallized using 450 ml of a mixture of ethyl acetate and anhydrous ethanol (the volume ratio of ethyl acetate to anhydrous ethanol was 9:1). The mixture was filtered under reduced pressure and dried in vacuo at 60°C for 10 hours to obtain an antistatic agent. Its H NMR spectrum data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 7.20 (d, J = 8.6 Hz, 8H), 7.05 (dt, J = 8.4, 0.8 Hz, 4H), 6.88 – 6.81 (m, 8H), 6.67 (d, J = 8.4 Hz, 4H), 4.58 – 4.51 (m, 8H), 4.48 (t,J = 4.9 Hz, 8H), 4.09 (p, J = 0.8 Hz, 2H), 4.05 – 3.95 (m, 4H), 3.86 – 3.76(m, 12H), 3.73 (d, J = 6.4 Hz, 4H), 3.61 – 3.46 (m, 8H), 3.41 (t, J = 8.6 Hz,8H), 3.28 (d, J = 6.0 Hz, 4H), 3.22 (s, 24H), 1.75 (tt, J = 8.6, 6.2 Hz, 8H), 1.27 (s, 120H), 0.93 – 0.85 (m, 12H).

[0025] Example 5 Preparation of flame retardant and antistatic composite material: (1) Weigh: PP: 700g, PE: 100g, antistatic agent (prepared in Example 4): 20g, compatibilizer (maleic anhydride grafted polypropylene): 30g, modified flame retardant (prepared in Example 1): 100g, lubricant (stearamide): 30g, antioxidant (antioxidant 1010): 10g; (2) PP, PE, antistatic agent, compatibilizer, modified flame retardant, lubricant and antioxidant are mixed in a high-speed mixer at a speed of 200 r / min and a mixing time of 30 min. The mixture is then introduced into a twin-screw extruder for extrusion granulation. The screw speed of the screw extruder is 10 r / s, the temperature of the conveying section of the twin-screw extruder is 160°C, the temperature of the melting section is 170°C, the temperature of the mixing section is 180°C, and the temperature of the homogenizing section is 180°C. The mixture is air-cooled and sieved to obtain a flame-retardant and antistatic composite material.

[0026] Example 6 Preparation of flame retardant and antistatic composite material: (1) Weigh: PP: 800 g, PE: 120 g, antistatic agent (prepared in Example 4): 30 g, compatibilizer (maleic anhydride grafted polypropylene): 40 g, modified flame retardant (prepared in Example 2): 120 g, lubricant (stearamide): 45 g, antioxidant (antioxidant 1010): 15 g; (2) PP, PE, antistatic agent, compatibilizer, modified flame retardant, lubricant and antioxidant are put into a high-speed mixer and mixed at a mixing temperature of 200 r / min and a mixing time of 30 min. The mixture is then introduced into a twin-screw extruder for extrusion granulation. The screw speed of the screw extruder is 10 r / s, the temperature of the conveying section of the twin-screw extruder is 165°C, the temperature of the melting section is 175°C, the temperature of the mixing rubber section is 185°C, and the temperature of the homogenizing section is 185°C. The mixture is air-cooled and sieved to obtain a flame-retardant and antistatic composite material.

[0027] Example 7 Preparation of flame retardant and antistatic composite material: (1) Weigh: PP: 850g, PE: 150g, antistatic agent (prepared in Example 4): 50g, compatibilizer (maleic anhydride grafted polypropylene): 50g, modified flame retardant (prepared in Example 3): 150g, lubricant (oleamide): 60g, antioxidant (antioxidant 1076): 20g; (2) PP, PE, antistatic agent, compatibilizer, modified flame retardant, lubricant and antioxidant are put into a high-speed mixer and mixed at a mixing temperature of 200 r / min and a mixing time of 30 min. The mixture is then introduced into a twin-screw extruder for extrusion granulation. The screw speed of the screw extruder is 10 r / s, the temperature of the conveying section of the twin-screw extruder is 170°C, the temperature of the melting section is 180°C, the temperature of the mixing rubber section is 190°C, and the temperature of the homogenizing section is 190°C. The mixture is air-cooled and sieved to obtain a flame-retardant and antistatic composite material.

[0028] Comparative Example 1 The raw material composition and preparation method of the flame-retardant antistatic composite material are basically the same as those in Example 6, except that the modified flame retardant (prepared in Example 2) is replaced by an equal weight of a bistriphosphonate compound (prepared in step S2 of Example 2).

[0029] Comparative Example 2 The raw material composition and preparation method of the flame-retardant antistatic composite material are basically the same as those in Example 6, except that the modified flame retardant (prepared in Example 2) is replaced by an equal weight of a modified flame retardant prepared by the following method: The preparation method of the modified flame retardant is substantially the same as that of Example 2, except that the tetramethyltetravinylcyclotetrasiloxane in step S1 is replaced by an equimolar amount of tetravinylsilane.

[0030] Comparative Example 3 The raw material composition and preparation method of the flame-retardant antistatic composite material are basically the same as those in Example 6, except that the modified flame retardant (prepared in Example 2) is replaced by an equal weight of a modified flame retardant prepared by the following method: The preparation method of the flame retardant is basically the same as that of Example 2, except that the amount of diethylenetriamine added in step S2 is reduced from 0.1 mol to 0.06 mol.

[0031] Comparative Example 4 The raw material composition and preparation method of the flame retardant antistatic composite material are basically the same as those of Example 6, except that the antistatic agent (prepared in Example 4) is replaced by an antistatic agent prepared by the following method with an equal weight: The preparation method of the antistatic agent is basically the same as that in Example 4, except that the N,N,N,N,-tetraepoxypropyl-4,4-diaminodiphenylmethane in step N1 is replaced by an equimolar amount of 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane.

[0032] Comparative Example 5 The raw material composition and preparation method of the flame retardant antistatic composite material are basically the same as those of Example 6, except that the antistatic agent (prepared in Example 4) is replaced by an antistatic agent prepared by the following method with an equal weight: The preparation method of the antistatic agent is basically the same as that of Example 4, except that the N,N,N,N,-tetracyclyl-4,4-diaminodiphenylmethane in step N1 is replaced by an equimolar amount of N,N,N',N'-tetrakis(oxiranylmethyl)-1,3-phenylenediamine.

[0033] Comparative Example 6 The raw material composition and preparation method of the flame retardant antistatic composite material are basically the same as those of Example 6, except that the antistatic agent (prepared in Example 4) is replaced by an antistatic agent prepared by the following method with an equal weight: The preparation method of the modified flame retardant is basically the same as that of Example 4, except that the (4-(2-(dimethylamino)ethoxy)phenyl)methanol in step N1 is replaced by an equal molar amount of 5-(dimethylamino)-1-pentanol.

[0034] The brand of PP used in this application is TOPILENE® J640; the brand of PE is HI-ZEX® 1300J; the maleic anhydride grafted polypropylene model is B1, produced by Coase Chemical Co., Ltd.

[0035] The flame-retardant and antistatic composite materials prepared in Examples 5-7 and Comparative Examples 1-6 were subjected to a tensile strength test in accordance with GB / T 1040.1-2006, with the sample shape being a dumbbell 1B type and the tensile speed being 20 mm / min. The flame retardant properties were determined by the oxygen index method in accordance with GB / T 2406.1-2008. The antistatic properties were tested in accordance with the requirements of A.1 in GB / T 1410-2006. The test results are shown in Table 1.

[0036] Table 1 Performance test data table

[0037] It can be seen from Examples 5, 6 and 7 in Table 1 that the flame retardant and antistatic composite material prepared in the present invention has good mechanical properties, flame retardant properties and antistatic properties.

[0038] The modified flame retardant prepared in this application achieves highly effective flame retardancy through a multi-path, multi-element synergistic approach. In the gas phase, the high-temperature pyrolysis of the phosphorus element produces phosphorus-containing free radicals such as PO· and HPO·, which can capture key active free radicals (such as H· and OH·) in the combustion chain reaction, thereby reducing combustion intensity. Thermal decomposition of the nitrogen element produces non-flammable gases, thereby reducing flame propagation speed. In the condensed phase, the low surface energy of the silicon element allows the modified flame retardant to migrate to the substrate surface, forming a dense and stable silicon-containing insulating carbon layer, thereby preventing or delaying flame spread. Furthermore, the long-chain alkyl structure in the modified flame retardant physically entangles with the PP and PE matrices, improving their dispersion properties. The modified flame retardant obtained by reacting diethylenetriamine with multiple bistriphosphonate compounds in Comparative Example 3 has a high molecular weight, poor compatibility with the PP and PE matrices, and poor dispersibility, resulting in poor flame retardancy and tensile strength.

[0039] The positively charged quaternary ammonium salt in the antistatic agent prepared in the present application preferentially adsorbs negative charges on the surface of the material, forming an electrostatic shielding layer and inhibiting the accumulation of static charge; the conjugated structure of the benzene ring can reduce the charge migration barrier, and the paired aniline groups can form a larger π-electron local conjugated structure, which together enhances the charge transfer capability and realizes electron hopping conduction, thereby reducing the resistivity; the hygroscopicity of the hydroxyl group (-OH) can adsorb environmental moisture, form ion migration channels on the surface of the material, and accelerate the charge dissipation process; the long alkyl chain structure is tightly bonded to the polymer matrix PP and PE through van der Waals forces, and promotes the polar ends to be oriented to the surface to form a conductive monolayer, thereby improving the antistatic performance of the composite material.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. However, any equivalent changes, modifications and evolutions made by ordinary technicians in this field without departing from the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A flame retardant and antistatic composite material, characterized in that: The composition comprises the following raw materials in parts by weight: PP: 70-85 parts, PE: 10-15 parts, antistatic agent: 2-5 parts, compatibilizer: 3-5 parts, modified flame retardant: 10-15 parts, lubricant: 3-6 parts, antioxidant: 1-2 parts; The modified flame retardant is prepared by the following method: S1: Tetramethyltetravinylcyclotetrasiloxane reacts with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to form a triphosphonate compound; S2: a triphosphonate compound reacts with diethylenetriamine to form a bistriphosphonate compound; S3: A bistriphosphonate compound reacts with 1-bromododecane to generate a modified flame retardant.

2. The flame retardant and antistatic composite material according to claim 1, characterized in that: In step S1, the molar ratio of tetramethyltetravinylcyclotetrasiloxane to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is 1:(3-3.2).

3. The flame retardant and antistatic composite material according to claim 1, characterized in that: In step S2, the molar ratio of the triphosphonate compound to diethylenetriamine is 2:(1.0-1.2).

4. The flame retardant and antistatic composite material according to claim 1, characterized in that: In step S3, the molar ratio of the bistriphosphonate compound to 1-bromododecane is 1:(3-4).

5. The flame retardant and antistatic composite material according to claim 1, characterized in that: The antistatic agent is prepared by the following method: N1: N,N,N,N,-tetracyclyl-4,4-diaminodiphenylmethane reacts with (4-(2-(dimethylamino)ethoxy)phenyl)methanol to form a hydroxy ether compound; N2: Hydroxyl ether compound reacts with 1-chlorooctadecane to form an antistatic agent.

6. The flame retardant and antistatic composite material according to claim 5, characterized in that: In step N1, the molar ratio of N,N,N,N,-tetracyclyl-4,4-diaminodiphenylmethane to (4-(2-(dimethylamino)ethoxy)phenyl)methanol is 1:4.5; in step N2, the molar ratio of the hydroxy ether compound to 1-chlorooctadecane is 1:4.

1.

7. The flame retardant and antistatic composite material according to claim 1, characterized in that: The compatibilizer is maleic anhydride grafted polypropylene.

8. The flame retardant and antistatic composite material according to claim 1, characterized in that: The lubricant is one of stearamide and oleamide.

9. The flame retardant and antistatic composite material according to claim 1, characterized in that: The antioxidant is one of antioxidant 1010 and antioxidant 1076.

10. A method for preparing the flame retardant and antistatic composite material according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Weigh by weight: PP: 70-85 parts, PE: 10-15 parts, antistatic agent: 2-5 parts, compatibilizer: 3-5 parts, modified flame retardant: 10-15 parts, lubricant: 3-6 parts, antioxidant: 1-2 parts; (2) PP, PE, antistatic agent, compatibilizer, modified flame retardant, lubricant, and antioxidant are placed in a high-speed mixer, stirred to obtain a mixed material, and extruded and granulated using a twin-screw extruder to obtain a flame-retardant and antistatic composite material.

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