Antistatic bulk molding compound composite material and method for producing the same

Abstract

The present application relates to the technical field of bulk molding compound, in particular to an antistatic bulk molding compound composite material and a preparation method thereof; in order to enhance the antistatic performance and mechanical properties of the bulk molding compound, modified glass fiber material and carbon black material are added in the bulk molding compound respectively; after the surface of the glass fiber material is treated by low-temperature plasma, an epoxy group structure is introduced on the surface of the glass fiber material, so that the bonding strength between the glass fiber and the epoxy resin is improved, and a benzophenone structure and a silicon-oxygen bond structure are introduced in the crosslinking network of the epoxy resin, so that the impact resistance and the ultraviolet resistance of the epoxy resin are enhanced, and the service life of the bulk molding compound composite material prepared by the present application is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bulk molding compound, in particular to an antistatic bulk molding compound composite material and a preparation method thereof. BACKGROUND

[0002] Bulk molding compound is a kind of composite material obtained by mixing resin material and reinforcing fiber material uniformly, has the advantages of fast forming speed and high production efficiency, and the mainstream bulk molding compound at present generally uses polyester resin material as resin matrix, but the mechanical properties of polyester resin are poor, and epoxy resin has excellent mechanical properties, so there is also a bulk molding compound system using epoxy resin as the resin matrix at present, but the brittleness of epoxy resin is large, and there is still a great use restriction in the use process. SUMMARY

[0003] The present application aims to provide an antistatic bulk molding compound composite material and a preparation method thereof to solve the problems in the background art.

[0004] In order to solve the above technical problems, the present application provides the following technical scheme: a preparation method of an antistatic bulk molding compound composite material, comprising the following steps:

[0005] S1. preparing modified glass fiber;

[0006] The glass fiber is placed in deionized water, heated to 75-85 DEG C and stirred for 10-15 min, then filtered and dried at 80 DEG C, and then the glass fiber is treated by low temperature plasma;

[0007] S12. The glass fiber treated by low temperature plasma is dispersed in an ethanol aqueous solution with an ethanol concentration of 90-95 wt%, stirred and dispersed for 10-15 min, then KH-550 is added in an amount of 5-10% of the volume of the ethanol aqueous solution, heated to 75-78 DEG C, and refluxed and stirred for 8-12 h, then the glass fiber is centrifuged and washed with deionized water for 2-3 times, and then dried to constant weight to obtain pretreated glass fiber;

[0008] S13. Disperse 4, 4-benzophenone dicarboxylic acid into DMF, after stirring and mixing for 15-25 min, add 1-ethyl-(3-dimethylaminopropyl) carbodiimide, continue mixing for 3-5 min, then add it into 1, 3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropping time is 1.5-2.5 h, after the dropping is completed, increase the temperature to 78-92℃, stir and react for 2-8 h, then cool to room temperature, add the reaction mixture into 1, 6-hexanediol diglycidyl ether again, the dropping time is 3-5 h, continuously stir during the dropping process, after the dropping is completed, increase the temperature to 75-85℃, stir and react for 2-8 h, then increase the temperature to 135℃, continue stirring and reacting for 0.5-1 h, add the pretreated glass fiber, ultrasonic oscillation for 1.5-3 h, centrifugal separation of the pretreated glass fiber, wash the surface for 2-3 times with clean DMF, then dry to constant weight to obtain the modified glass fiber;

[0009] S2. Prepare an antistatic bulk molding compound composite material;

[0010] Weigh the epoxy resin, latent curing agent, accelerator, inorganic filler, conductive filler and release agent by weight fraction, mix and stir uniformly, then add the modified glass fiber, knead at room temperature for 20-30 min, so that the fiber is fully soaked and uniformly kneaded, to obtain an antistatic bulk molding compound composite material.

[0011] Further, the antistatic bulk molding compound composite material is formed by mixing 20-55 parts of epoxy resin, 1.5-5 parts of latent curing agent, 0.5-1.5 parts of accelerator, 15-45 parts of inorganic filler, 3-10 parts of conductive filler, 1.5-3 parts of release agent and 20-40 parts of chopped glass fiber by weight fraction.

[0012] Further, the epoxy resin is any one or more of bisphenol A type E-51 epoxy resin and bisphenol A type E-55 epoxy resin.

[0013] Further, the latent curing agent is dicyandiamide; the accelerator is benzyl triethyl ammonium chloride.

[0014] Further, the inorganic filler is any one of white carbon black and calcium carbonate; the conductive filler is carbon black; the release agent is calcium stearate.

[0015] Further, in step S11, the discharge mode during low temperature plasma treatment is glow discharge, the reaction gas is carbon dioxide, the gas pressure is 2000-5000 Pa, the treatment power is 300-1000 W, and the treatment time is 1-15 min.

[0016] Further, in step S13, the mass ratio of the 4,4-benzophenone dicarboxylic acid, 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide, 1,3-bis(amino propane) tetramethyl disiloxane is 1:(0.01-0.03) by weight parts:

[0017] (1.5-1.8).

[0018] Further, in step S13, the mass ratio of the 4,4-benzophenone dicarboxylic acid, 1,6-hexanediol diglycidyl ether, pretreated glass fiber is 1:(1.4-1.7):(5-30) by weight parts.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] In order to enhance the antistatic performance, mechanical properties and impact resistance of the bulk molding compound, the present application first limits the inorganic reinforcing component, and adds modified glass fiber material to the bulk molding compound; the present application first performs low-temperature plasma treatment on the surface of the glass fiber material, roughens the surface of the glass fiber by using plasma, and effectively improves the surface free energy of the glass fiber after plasma treatment, thereby promoting the hydrolysis and grafting of the silane coupling agent on the surface of the glass fiber in step S12, and introducing more amino groups on the surface of the glass fiber.

[0021] On this basis, the present application also uses 4,4-benzophenone dicarboxylic acid as a raw material, reacts it with 1,3-bis(amino propane) tetramethyl disiloxane and 1,6-hexanediol diglycidyl ether, thereby preparing a product with an epoxy group as an end group and containing benzophenone and siloxane bond structures, and then mixing and reacting it with glass fiber with amino groups, thereby introducing benzophenone groups, siloxane bonds and epoxy groups on the surface of the glass fiber; the introduction of benzophenone groups can bring excellent ultraviolet resistance to the mixed material, and benzophenone can effectively absorb ultraviolet light and convert it into heat energy form, reducing the aging of the epoxy resin caused by ultraviolet light; at the same time, the introduction of siloxane bonds can further improve the impact resistance of the epoxy resin and glass fiber combination interface, thereby better realizing stress dispersion, reducing the brittle fracture defect of the epoxy resin, and the epoxy groups introduced on the surface of the glass fiber can effectively improve the surface polarity of the glass fiber, improve the dispersion of the glass fiber in the epoxy resin, and these epoxy groups can participate in the curing and crosslinking of the epoxy resin under the action of the latent initiator, so that the bonding strength of the glass fiber and the epoxy resin is higher.

[0022] Meanwhile, the addition of the carbon black filler can achieve the shielding and absorption of ultraviolet light on the basis of enhancing the conductive capacity of the bulk molding compound and improving the antistatic performance, thereby further enhancing the ultraviolet resistance of the bulk molding compound prepared in the application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0024] The glass fiber used in the application has a diameter of 9-13 μm and a length of 3-50 mm; the calcium carbonate used has a particle size of 1200 mesh; and the carbon black used has a particle size of 1200 mesh.

[0025] Embodiment 1. A preparation method of an antistatic bulk molding compound composite material, comprising the following steps:

[0026] S1. Preparation of modified glass fiber

[0027] The glass fiber is placed in deionized water, heated to 85℃ and stirred for cleaning for 15 min, then filtered and dried at 80℃ until constant weight. Then the glass fiber is treated by low-temperature plasma. The discharge mode during the low-temperature plasma treatment is glow discharge, the reaction gas is carbon dioxide, the gas pressure is 3500 Pa, the treatment power is 300 W, and the treatment time is 5 min.

[0028] S12. The glass fiber treated by low-temperature plasma is dispersed in an ethanol aqueous solution with an ethanol concentration of 95wt%, stirred and dispersed for 10 min, then 10% of the volume of the ethanol aqueous solution is added with KH-550, heated to 75℃, refluxed and stirred for reaction for 8 h, then the glass fiber is centrifuged and washed with deionized water for 2 times, and dried until constant weight to obtain the pretreated glass fiber.

[0029] S13. 1 part of 4,4-benzophenone dicarboxylic acid was dispersed in DMF, after stirring for 15 min, 0.01 part of 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide was added, and after continuing to mix for 3 min, it was added dropwise to 1.5 parts of 1,3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropwise addition lasted for 1.5 h, after the dropwise addition was completed, the temperature was raised to 85°C, and after stirring for 5 h, the reaction mixture was again added dropwise to 1.4 parts of 1,6-hexanediol diglycidyl ether, the dropwise addition lasted for 3 h, and the dropwise addition process was continuously stirred, after the dropwise addition was completed, the temperature was raised to 75°C, and after stirring for 5 h, the temperature was raised to 135°C, and after continuing to stir for 0.5 h, 5 parts of pretreated glass fiber was added, ultrasonic oscillation reaction was carried out for 1.5 h, the pretreated glass fiber was centrifuged, and after washing the surface of the pretreated glass fiber twice with clean DMF, drying to constant weight, modified glass fiber was obtained;

[0030] S2. Preparation of an antistatic bulk molding compound composite material;

[0031] 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyltriethylammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate were mixed according to the weight fraction, and after stirring uniformly, 20 parts of modified glass fiber was added, and after kneading at room temperature for 30 min, the fiber was fully immersed and uniformly kneaded to obtain an antistatic bulk molding compound composite material.

[0032] Example 2. A preparation method of an antistatic bulk molding compound composite material, comprising the following steps:

[0033] Compared with Example 1, the low-temperature plasma treatment time in step S1 is increased in this embodiment;

[0034] S1. Preparation of modified glass fiber;

[0035] The glass fiber was placed in deionized water, and after stirring and washing at 85°C for 15 min, it was filtered and dried to constant weight at 80°C hot air, and then the glass fiber was subjected to low-temperature plasma treatment, the discharge mode during low-temperature plasma treatment was glow discharge, the reaction gas was carbon dioxide, the gas pressure was 3500 Pa, the treatment power was 300 W, and the treatment time was 15 min;

[0036] S12. The glass fiber treated by low-temperature plasma was dispersed in an ethanol aqueous solution with an ethanol concentration of 95wt%, after stirring and dispersing for 10 min, 10% of the volume of the ethanol aqueous solution was added to KH-550, the temperature was raised to 75°C, and after reflux stirring reaction for 8 h, the glass fiber was centrifuged, and after washing the glass fiber twice with deionized water, drying to constant weight, pretreated glass fiber was obtained;

[0037] S13. 1 part of 4,4-benzophenone dicarboxylic acid was dispersed in DMF, after stirring for 15 min, 0.01 part of 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide was added, and after continuing to mix for 3 min, it was added dropwise to 1.5 parts of 1,3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropwise addition lasted for 1.5 h, after the dropwise addition was completed, the temperature was raised to 85°C, and after stirring for 5 h, the reaction mixture was again added dropwise to 1.4 parts of 1,6-hexanediol diglycidyl ether, the dropwise addition lasted for 3 h, and the dropwise addition process was continuously stirred, after the dropwise addition was completed, the temperature was raised to 75°C, and after stirring for 5 h, the temperature was raised to 135°C, and after continuing to stir for 0.5 h, 5 parts of pretreated glass fiber was added, ultrasonic oscillation reaction was carried out for 1.5 h, the pretreated glass fiber was centrifuged, and after washing the surface of the pretreated glass fiber twice with clean DMF, drying to constant weight, the modified glass fiber was obtained;

[0038] S2. Preparation of an antistatic bulk molding compound composite material;

[0039] 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyltriethylammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate were weighed and mixed, and after stirring uniformly, 20 parts of modified glass fiber was added, and after kneading at room temperature for 30 min, the fiber was fully immersed and uniformly kneaded to obtain an antistatic bulk molding compound composite material.

[0040] Example 3. A preparation method of an antistatic bulk molding compound composite material, comprising the following steps:

[0041] Compared with Example 1, the addition amount of 1,3-bis(amino propane) tetramethyl disiloxane in step S13 is increased in this embodiment;

[0042] S1. Preparation of modified glass fiber;

[0043] The glass fiber was placed in deionized water, and after stirring and washing at 85°C for 15 min, it was filtered and dried to constant weight at 80°C hot air, and then the glass fiber was subjected to low temperature plasma treatment. The discharge mode during low temperature plasma treatment was glow discharge, the reaction gas was carbon dioxide, the gas pressure was 3500 Pa, the treatment power was 300 W, and the treatment time was 5 min;

[0044] S12. The glass fiber treated by low temperature plasma was dispersed in an ethanol aqueous solution with an ethanol concentration of 95wt%, and after stirring and dispersing for 10 min, 10% of the volume of the ethanol aqueous solution was added to KH-550, and the temperature was raised to 75°C. After reflux stirring reaction for 8 h, the glass fiber was centrifuged, and after washing the glass fiber twice with deionized water, drying to constant weight, the pretreated glass fiber was obtained;

[0045] S13. 1 part of 4,4-benzophenone dicarboxylic acid was dispersed in DMF, after stirring for 15 min, 0.01 part of 1-ethyl-(3-dimethylaminopropyl) carbodiimide was added, and after continuing to mix for 3 min, it was added dropwise to 1.8 parts of 1,3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropwise addition lasted for 1.5 h, after the dropwise addition was completed, the temperature was raised to 85°C, and after stirring for 5 h, the reaction mixture was again added dropwise to 1.4 parts of 1,6-hexanediol diglycidyl ether, the dropwise addition lasted for 3 h, and the dropwise addition process was continuously stirred, after the dropwise addition was completed, the temperature was raised to 75°C, and after stirring for 5 h, the temperature was raised to 135°C, and after continuing to stir for 0.5 h, 5 parts of pretreated glass fiber was added, ultrasonic oscillation reaction was carried out for 1.5 h, the pretreated glass fiber was centrifuged, and after washing the surface of the pretreated glass fiber with clean DMF for 2 times, drying to constant weight, the modified glass fiber was obtained;

[0046] S2. Preparation of an antistatic bulk molding compound composite material;

[0047] 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyltriethylammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate were mixed according to the weight fraction, and after stirring uniformly, 20 parts of modified glass fiber was added, and after kneading at room temperature for 30 min, the fiber was fully immersed and uniformly kneaded to obtain an antistatic bulk molding compound composite material.

[0048] Example 4. A preparation method of an antistatic bulk molding compound composite material, comprising the following steps:

[0049] Compared with example 3, the addition amount of 1,6-hexanediol diglycidyl ether in step S13 is increased in this embodiment;

[0050] S1. Preparation of modified glass fiber;

[0051] The glass fiber was placed in deionized water, and after stirring and washing at 85°C for 15 min, it was filtered and dried to constant weight at 80°C hot air, and then the glass fiber was subjected to low temperature plasma treatment. The discharge mode during low temperature plasma treatment was glow discharge, the reaction gas was carbon dioxide, the gas pressure was 3500 Pa, the treatment power was 300 W, and the treatment time was 5 min;

[0052] S12. The glass fiber treated by low temperature plasma was dispersed in an ethanol aqueous solution with an ethanol concentration of 95wt%, and after stirring and dispersing for 10 min, 10% of the volume of the ethanol aqueous solution was added to KH-550, and the temperature was raised to 75°C. After reflux stirring reaction for 8 h, the glass fiber was centrifuged, and after washing the glass fiber with deionized water for 2 times, drying to constant weight, the pretreated glass fiber was obtained;

[0053] S13. 1 part of 4,4-benzophenone dicarboxylic acid was dispersed in DMF, after stirring for 15 min, 0.01 part of 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide was added, and after continuing to mix for 3 min, it was added dropwise to 1.8 parts of 1,3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropwise addition lasted for 1.5 h, after the dropwise addition was completed, the temperature was raised to 85°C, and after stirring for 5 h, the reaction mixture was again added dropwise to 1.7 parts of 1,6-hexanediol diglycidyl ether, the dropwise addition lasted for 3 h, and the dropwise addition process was continuously stirred, after the dropwise addition was completed, the temperature was raised to 75°C, and after stirring for 5 h, the temperature was raised to 135°C, and after continuing to stir for 0.5 h, 5 parts of pretreated glass fiber was added, ultrasonic oscillation reaction was carried out for 1.5 h, the pretreated glass fiber was centrifuged, and after washing the surface of the glass fiber with clean DMF for 2 times, drying to constant weight, modified glass fiber was obtained;

[0054] S2. Preparation of an antistatic bulk molding compound composite material;

[0055] 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyl triethyl ammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate were mixed according to the weight fraction, and after stirring uniformly, 20 parts of modified glass fiber was added, and after kneading at room temperature for 30 min, the fiber was fully immersed and uniformly kneaded to obtain an antistatic bulk molding compound composite material.

[0056] Comparative Example 1. A method for preparing an antistatic bulk molding compound composite material, comprising the following steps:

[0057] Compared with Example 1, the present comparative example does not perform step S13 treatment;

[0058] S1. Preparation of modified glass fiber;

[0059] The glass fiber was placed in deionized water, and after stirring and washing at 85°C for 15 min, it was filtered and dried to constant weight at 80°C hot air, and then the glass fiber was subjected to low temperature plasma treatment. The discharge mode during low temperature plasma treatment was glow discharge, the reaction gas was carbon dioxide, the gas pressure was 3500 Pa, the treatment power was 300 W, and the treatment time was 5 min;

[0060] S12. The glass fiber treated by low temperature plasma was dispersed in an ethanol aqueous solution with an ethanol concentration of 95wt%, and after stirring and dispersing for 10 min, 10% of the volume of the ethanol aqueous solution was added to KH-550, and the temperature was raised to 75°C. After reflux stirring reaction for 8 h, the glass fiber was centrifuged, and after washing the glass fiber with deionized water for 2 times, drying to constant weight, modified glass fiber was obtained;

[0061] S2. Preparation of an antistatic bulk molding compound composite material;

[0062] Take 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyl triethyl ammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate, mix, stir evenly, then add 20 parts of modified glass fiber, knead for 30 min at room temperature, make the fiber fully soaked and kneaded evenly, get the antistatic bulk molding compound.

[0063] Comparative Example 2. A method for preparing an antistatic bulk molding compound, comprising the following steps:

[0064] Compared with Example 1, only 1,6-hexanediol diglycidyl ether is used in step S13 of this embodiment to treat the pretreated glass fiber;

[0065] S1. Preparation of modified glass fiber;

[0066] Put the glass fiber in deionized water, heat to 85℃ and stir for 15 min, then filter and dry at 80℃, then treat the glass fiber with low temperature plasma, the discharge mode is glow discharge, the reaction gas is carbon dioxide, the gas pressure is 3500 Pa, the treatment power is 300 W, and the treatment time is 5 min;

[0067] S12. Disperse the glass fiber treated by low temperature plasma into an ethanol aqueous solution with an ethanol concentration of 95wt%, stir for 10 min, then add KH-550 with a volume of 10% of the ethanol aqueous solution, heat to 75℃, reflux and stir for 8 h, then centrifuge the glass fiber, wash it with deionized water for 2 times, and dry to constant weight to obtain the pretreated glass fiber;

[0068] S13. Add 5 parts of pretreated glass fiber to 20 parts of 1,6-hexanediol diglycidyl ether, ultrasonic oscillation for 1.5 h, then centrifuge the pretreated glass fiber, wash its surface with clean DMF for 2 times, and dry to constant weight to obtain the modified glass fiber;

[0069] S2. Preparation of antistatic bulk molding compound;

[0070] Take 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyl triethyl ammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate, mix, stir evenly, then add 20 parts of modified glass fiber, knead for 30 min at room temperature, make the fiber fully soaked and kneaded evenly, get the antistatic bulk molding compound.

[0071] Comparative Example 3. A method for preparing an antistatic bulk molding compound composite material, comprising the following steps:

[0072] Comparing with Example 1, the comparative example only uses unmodified glass fiber to replace the equivalent amount;

[0073] Weigh 40 parts of bisphenol A type E-51 epoxy resin, 1.5 parts of dicyandiamide, 0.5 parts of benzyl triethyl ammonium chloride accelerator, 20 parts of calcium carbonate, 5 parts of carbon black and 1.5 parts of calcium stearate, mix them uniformly, then add 20 parts of glass fiber, knead for 30 min at room temperature, so that the fiber is fully soaked and kneaded uniformly, to obtain an antistatic bulk molding compound composite material.

[0074] Detection: the antistatic bulk molding compound composite materials prepared in Examples 1-4 and Comparative Examples 1-3 were injection molded, the injection pressure was 30 MPa, the post-curing temperature was 160℃, and the curing time was 1.5h;

[0075] According to GB 1447-2005, the tensile properties of the antistatic bulk molding compound composite materials prepared in Examples 1-4 and Comparative Example 3 were detected after they were injection molded and cured to prepare test samples;

[0076] According to GB 1449-2005, the bending strength of the antistatic bulk molding compound composite materials prepared in Examples 1-4 and Comparative Example 3 was detected after they were injection molded and cured to prepare test samples;

[0077] According to GB / T 1451-2005, the impact toughness of the antistatic bulk molding compound composite materials prepared in Examples 1-4 and Comparative Example 3 was detected after they were injection molded and cured to prepare test samples;

[0078] After the antistatic bulk molding compound composite materials prepared in Examples 1-4 and Comparative Example 3 were injection molded and cured to prepare test samples, they were subjected to ultraviolet aging according to ISO 4892-3 standard, and the detection conditions were 340nm light with an intensity of 0.76W / m 2 After irradiation for 304h, the tensile strength was detected again;

[0079] The detection results are shown in the following table;

[0080]

[0081] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for producing an antistatic bulk molding compound composite material, characterized by, Comprising the following steps: S1. Preparation of modified glass fiber; S11. Put the glass fiber into deionized water, heat to 75-85℃, stir and clean for 10-15 min, then filter, dry to constant weight at 80℃ hot air, and then perform low temperature plasma treatment on the glass fiber; S12. Disperse the glass fiber treated by low temperature plasma into an ethanol aqueous solution with an ethanol concentration of 90-95wt%, stir and disperse for 10-15 min, then add KH-550 with a volume of 5-10% of the ethanol aqueous solution, heat to 75-78℃, reflux and stir for 8-12 h, then centrifuge the glass fiber, wash the glass fiber with deionized water for 2-3 times, and dry to constant weight to obtain pretreated glass fiber; S13. Disperse 4,4-benzophenone dicarboxylic acid into DMF, stir and mix for 15-25 min, then add 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide, continue to mix for 3-5 min, then add it into 1,3-bis(amino propane) tetramethyl disiloxane at a constant speed, the dropping time is 1.5-2.5 h, after the dropping is completed, heat to 78-92℃, stir and react for 2-8 h, then cool to room temperature, add the reaction mixture into 1,6-hexanediol diglycidyl ether again, the dropping time is 3-5 h, continuously stir during the dropping process, after the dropping is completed, heat to 75-85℃, stir and react for 2-8 h, then heat to 135℃, continue to stir and react for 0.5-1 h, then add the pretreated glass fiber, ultrasonic oscillation reaction for 1.5-3 h, centrifuge the pretreated glass fiber, wash its surface with clean DMF for 2-3 times, and dry to constant weight to obtain modified glass fiber; S2. Preparation of antistatic bulk molding compound composite material; Mix the epoxy resin, latent curing agent, accelerator, inorganic filler, conductive filler and release agent by weight fraction, stir uniformly, then add the modified glass fiber, knead for 20-30 min at room temperature to make the fiber fully infiltrate and knead uniformly to obtain the antistatic bulk molding compound composite material; The antistatic bulk molding compound composite material is formed by mixing 20-55 parts of epoxy resin, 1.5-5 parts of latent curing agent, 0.5-1.5 parts of accelerator, 15-45 parts of inorganic filler, 3-10 parts of conductive filler, 1.5-3 parts of release agent and 20-40 parts of chopped glass fiber by weight fraction; In step S13, the mass ratio of 4,4-benzophenone dicarboxylic acid, 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide and 1,3-bis(amino propane) tetramethyl disiloxane is 1:(0.01-0.03):(1.5-1.8) by weight fraction; In step S13, the mass ratio of 4,4-benzophenone dicarboxylic acid, 1,6-hexanediol diglycidyl ether and pretreated glass fiber is 1:(1.4-1.7):(5-30) by weight fraction.

2. A process for the preparation of an antistatic bulk molding compound composite material according to claim 1, characterized in that: The epoxy resin is any one or more of bisphenol A type E-51 epoxy resin and bisphenol A type E-55 epoxy resin.

3. A process for the preparation of an antistatic bulk molding compound composite material according to claim 1, characterized in that: The latent curing agent is dicyandiamide; the accelerator is benzyl triethyl ammonium chloride.

4. The method for preparing an antistatic bulk molding compound according to claim 1, characterized in that: The inorganic filler is any one of white carbon black and calcium carbonate; the conductive filler is carbon black; and the release agent is calcium stearate.

5. The method for preparing an antistatic bulk molding compound according to claim 1, characterized in that: In step S11, the discharge mode in the low-temperature plasma treatment is glow discharge, the reaction gas is carbon dioxide, the gas pressure is 2000-5000 Pa, the treatment power is 300-1000 W, and the treatment duration is 1-15 min.

6. An antistatic bulk molding compound composite material prepared by the method of any one of claims 1-5.

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