Electroplating-imitated PC / ABS composite material and preparation method and application thereof

Abstract

The invention provides an electroplating-imitating PC / ABS composite material and a preparation method and application thereof, and relates to the technical field of electroplating-imitating composite material preparation.The preparation method of the electroplating-imitating PC / ABS composite material comprises the steps that metal powder is provided, the metal powder, PC resin, ABS resin, a compatilizer, a flexibilizer, a lubricant, an antioxidant and an ultraviolet absorbent are mixed to obtain a mixture, and the mixture is subjected to extrusion molding to obtain the electroplating-imitating PC / ABS composite material. The mixture is prepared into the electroplating-imitated PC / ABS composite material through a melt blending process. The electroplating-imitating PC / ABS composite material not only has metal luster similar to that after electroplating, but also has excellent mechanical properties and appearance properties.

Description

Technical Field

[0001] This invention relates to the field of electroplating-like composite material preparation technology, specifically to an electroplating-like PC / ABS composite material, its preparation method, and its application. Background Technology

[0002] Decorative panels and dashboards used in industrial products are generally electroplated parts. Electroplated parts are not only expensive, but the electroplating process is also energy-intensive and causes significant environmental pollution. With industrial development and technological advancements, cost reduction for industrial products is a concern for every manufacturer. Therefore, in order to reduce product costs while minimizing environmental pollution, imitation electroplated composite materials have become a focus of attention.

[0003] Electroplating-like processes can achieve a metallic texture and high gloss surface effect on non-metallic substrates such as plastics. Therefore, electroplating-like composite materials generally have metallic luster and texture, while also possessing the advantages of plastics such as light weight, easy molding, and low cost, making them popular in the market.

[0004] PC / ABS composite materials have been widely used in interior and exterior parts of industrial products due to their excellent comprehensive properties and wide availability. However, existing electroplating-like composite materials prepared using PC / ABS composite materials as the base material have poor mechanical properties and exhibit surface defects such as flow marks, color spots, and alternating light and dark stripes. Therefore, preparing an electroplating-like PC / ABS composite material with excellent mechanical and appearance properties has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a simulated electroplated PC / ABS composite material, its preparation method, and its application. This solves the technical problems of poor mechanical properties and surface defects in existing simulated electroplated composite materials prepared using PC / ABS composite materials as the substrate.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] On one hand, the present invention provides a method for preparing an electroplated PC / ABS composite material, comprising:

[0008] A metal powder is provided, and the metal powder, PC resin, ABS resin, compatibilizer, toughening agent, lubricant, antioxidant, and UV absorber are mixed to obtain a mixture. The mixture is then used to prepare a PC / ABS composite material with electroplating-like properties through a melt blending process. The mixture comprises 60-70 parts PC resin, 20-35 parts ABS resin, 0.5-3 parts compatibilizer, 0.5-3 parts metal powder, 3-7 parts toughening agent, 0.3-0.6 parts lubricant, 0.3-0.6 parts antioxidant, and 0.3-0.6 parts UV absorber. The PC resin is an aliphatic polycarbonate or aromatic polycarbonate, and its melt flow index is 3-35 g / 10 min at 300°C and 1.2 kg. The ABS resin is an acrylonitrile-butadiene-styrene copolymer. The melt index at 220℃ and 10Kg is 15-30g / 10min; the compatibilizer is a styrene-maleic anhydride random copolymer; the toughening agent is at least one of ABS high-resin powder, MBS, or EBS; the lubricant is pentaerythritol stearate; the antioxidant is a phosphite antioxidant; preferably, the phosphite antioxidant is at least one of phenol-free phosphite antioxidant, low-phenol phosphite antioxidant, or phenol-containing phosphite antioxidant; the ultraviolet absorber is 2-(2'-hydroxy-3',5'-dicumylphenyl)benzotriazole;

[0009] Preferably, the preparation method further includes processing the metal powder to obtain modified metal powder. The processing includes: providing aminosilane and methyldimethoxysilane; hydrolyzing the aminosilane and methyldimethoxysilane to prepare a silane hydrolysate; adding the metal powder to the silane hydrolysate for full reaction; then filtering, washing, and drying to obtain silanized metal powder; reacting the silanized metal powder with an organic acid to obtain coated metal powder; and subjecting the coated metal powder to a post-processing process to obtain modified metal powder.

[0010] In the above modification method, during the reaction of metal powder with silane hydrolysate, the silanol (-SiOH) generated by silane hydrolysis undergoes dehydration condensation with the hydroxyl groups (-MOH) on the surface of the metal powder to form a strong -Si-OM covalent bond, providing the main anchoring and strong polar interaction. When the silanized metal powder reacts with organic acid, the -NH2 of aminosilane reacts with the -COOH of the organic acid to form an amide bond, resulting in a stable interfacial bond between the organic acid and the silanized metal powder, thereby reducing the surface energy of the metal powder. After post-processing, the -Si-H of methyldimethoxysilane and the alkoxy group of aminosilane react to generate ≡Si-O-Si≡ linkages, forming a three-dimensional network structure within the coating layer through the ≡Si-O-Si≡ linkages.

[0011] The modified metal powder includes metal powder and a coating layer located on the outer periphery of the metal powder. The coating layer includes an inner layer, an intermediate layer and an outer layer from the inside to the outside. The inner layer is a silane layer formed by aminosilane and methyldimethoxysilane on the surface of the metal powder. The intermediate layer has a three-dimensional network structure and the outer layer is a low surface energy layer.

[0012] Preferably, the post-treatment process involves reacting at 150-240°C for 1.5-3.5 hours.

[0013] After the above post-processing, the -Si-H of methyldimethoxysilane and the alkoxy group of aminosilane react to generate ≡Si-O-Si≡ linkages. These ≡Si-O-Si≡ linkages form a three-dimensional network structure within the coating layer, increasing the density of the intermediate layer and resisting the damage to the coating layer caused by the high temperature and shear stress of stirring during subsequent melt blending. This improves the strength of the coating layer. The outer layer of the coating layer remains stably connected to the metal powder through the intermediate and inner layers, thereby improving the compatibility between the modified metal powder and the PC / ABS matrix.

[0014] Preferably, the mass ratio of aminosilane, methyldimethoxysilane, and organic acid is 1:0.08-2:0.2-5.

[0015] Preferably, the mass ratio of aminosilane, methyldimethoxysilane, and organic acid is 1:0.3-0.5:1.5-2.

[0016] Preferably, the aminosilane is selected from any one of aminopropyltrimethoxysilane, aminopropylmethyldiethoxysilane, γ-aminopropyltriethoxysilane, and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

[0017] Preferably, the organic acid is selected from stearic acid.

[0018] Preferably, the mass ratio of the modified metal powder to ABS resin is 1-6:40-70.

[0019] Preferably, the method for preparing the simulated electroplated PC / ABS composite material satisfies at least one of the following conditions:

[0020] The metal powder is selected from aluminum powder;

[0021] The particle size D50 of the metal powder is 1-50 μm;

[0022] The melt blending process includes temperature zones, which are sequentially 100-110℃, 220-230℃, 220-230℃, 220-230℃, 220-230℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃; the blending speed is 400±50 r / min, and the vacuum degree is 0.07-0.1 MPa.

[0023] In a second aspect, the present invention provides an electroplated PC / ABS composite material, wherein the electroplated PC / ABS composite material is prepared by the preparation method described in the first aspect.

[0024] Thirdly, the present invention provides an application of the electroplated PC / ABS composite material described in the second aspect in the preparation of automotive interior and exterior trim panels.

[0025] Compared with existing technologies, it has the following beneficial effects:

[0026] 1. The preparation method of the electroplated PC / ABS composite material of this application includes treating the metal powder to form a coating layer on the outside of the metal powder to obtain modified metal powder. The coating layer includes an inner layer, an intermediate layer, and an outer layer. The inner layer is a silane layer formed by aminosilane and methyldimethoxysilane, which is covalently bonded to the surface of the metal powder to provide anchoring. The intermediate layer is formed under post-treatment conditions by the reaction of the -Si-H of methyldimethoxysilane and the alkoxy group of aminosilane to generate ≡Si-O-Si≡ chain segments. The ≡Si-O-Si≡ chain segments form a three-dimensional network structure in the intermediate layer, thereby improving the density, hydrophobicity, and firmness of the coating layer. The outer layer is a low surface energy layer with good compatibility with the PC / ABS matrix, composed of long alkyl chains of organic acid and methyl groups of methylsilane. Under the high temperature and stirring conditions of the melt blending stage, the outer layer is stably connected to the metal powder through the intermediate and inner layers, thereby improving the compatibility of the modified metal powder with the PC / ABS matrix. Therefore, after modification, under the synergistic effect of aminosilane, methyldimethoxysilane, and organic acid, the modified metal powder maintains good compatibility with the PC / ABS matrix, thus preventing the metal powder from agglomerating in the matrix. Consequently, the electroplated PC / ABS composite material prepared by the method of this invention has fewer stress concentration points when subjected to external forces, better continuity of the PC and ABS blend matrix, and higher tensile strength, flexural strength, and impact strength. Furthermore, the modified metal powder exhibits good compatibility with the matrix and is uniformly dispersed. The surface of the electroplated PC / ABS composite material displays a uniform and bright metallic luster and color, with a good metallic texture, and the surface does not show appearance defects such as flow marks, color spots, or alternating light and dark stripes. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This application provides a simulated electroplated PC / ABS composite material, its preparation method, and its application, which solves the technical problem of poor compatibility between metal powder and PC / ABS matrix, and achieves superior mechanical and appearance properties of the simulated electroplated PC / ABS composite material.

[0029] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0030] The inventors discovered that adding metal powder to the formulation could give the prepared PC / ABS alloy a strong metallic luster similar to electroplating. However, the metal powder had poor compatibility with the PC / ABS matrix, affecting the mechanical properties and appearance of the product. Therefore, the inventors selected aminosilane, methyldimethoxysilane, and organic acid to pretreat the metal powder under certain conditions, thereby forming a coating layer including an inner layer, a middle layer, and an outer layer on the outer surface of the metal powder, thus preparing modified metal powder. The modified metal powder has good compatibility with the PC / ABS matrix, and the prepared electroplated PC / ABS composite material has excellent mechanical and appearance properties.

[0031] The modified metal powder comprises metal powder and a coating layer on the outer periphery of the metal powder. The coating layer, from the inside out, includes an inner layer, an intermediate layer, and an outer layer. The inner layer is a silane layer formed by aminosilane and methyldimethoxysilane, covalently bonded to the metal powder surface, providing anchoring and strong polar interactions. The intermediate layer is formed under post-treatment conditions by the reaction of the -Si-H groups of methyldimethoxysilane and the alkoxy groups of aminosilane to generate ≡Si-O-Si≡ chain segments. These ≡Si-O-Si≡ chain segments form a three-dimensional network structure within the intermediate layer, thereby increasing the density and hydrophobicity of the coating layer. The outer layer is a non-polar, low surface energy layer highly compatible with PC / ABS, composed of long alkyl chains of organic acids and methyl groups of methylsilane. Under the high temperature and stirring conditions of the melt blending stage, the outer layer remains stably connected to the metal powder through the intermediate and inner layers, thus improving the compatibility of the modified metal powder with the matrix. Therefore, after modification, under the synergistic effect of aminosilane, methyldimethoxysilane, and organic acid, the modified metal powder maintains good compatibility with the PC / ABS matrix, thus preventing the metal powder from agglomerating in the matrix. Consequently, the electroplated PC / ABS composite material prepared by the method of this invention has fewer stress concentration points when subjected to external forces, better continuity of the PC and ABS blend matrix, and higher tensile strength, flexural strength, and impact strength. Furthermore, the modified metal powder exhibits good compatibility with the matrix and is uniformly dispersed. The surface of the electroplated PC / ABS composite material displays a uniform and bright metallic luster and color, with a good metallic texture, and the surface does not show appearance defects such as flow marks, color spots, or alternating light and dark stripes.

[0032] To better understand the above technical solution, the following will provide a detailed explanation of the above technical solution in conjunction with specific implementation methods.

[0033] I. Preparation Method

[0034] The manufacturers and models of the raw materials used in the embodiments of this invention are as follows:

[0035] Aminopropyltrimethoxysilane: Wokai, CAS No. 13822-56-5, National Drug Code XW031382256502;

[0036] Methyldimethoxysilane: Wokai, CAS No. 16881-77-9, National Drug Code XW1688177904;

[0037] Aluminum powder: Manufacturer is Xuyang New Materials Hefei Xuyang Spherical Aluminum Powder;

[0038] Stearic acid (n-octadecanoic acid): Shanghai Medical Products Administration, CAS No. 57-11-4, National Drug Code 30171118;

[0039] PC (polycarbonate) resin: Cangzhou Dahua, brand name CH8105;

[0040] ABS (acrylonitrile-butadiene-styrene copolymer) resin: Shanghai Gaoqiao, grade ABS 8434;

[0041] Toughening agent: Kanekachi, Japan, MBS 722;

[0042] Lubricant: Italian brand Faji, PETS (dipentaerythritol stearate);

[0043] Antioxidant 1076: BASF's 1076;

[0044] Antioxidant 168: BASF's 168;

[0045] Ultraviolet absorber: UV-234 from Tianjin Lianlong;

[0046] Compatibilizer: Shanghai Huawen, SA-001.

[0047] Example 1

[0048] This embodiment provides a method for preparing an electroplated PC / ABS composite material, including the following steps:

[0049] S1. Pretreatment of aluminum powder:

[0050] S11. Prepare 300 parts of ethanol / water mixed solvent according to the volume ratio of ethanol to deionized water of 90:10. Adjust the pH of the ethanol / water mixed solvent to 5 using 1% (v / v) acetic acid aqueous solution. Slowly add 5 parts of aminopropyltrimethoxysilane and 1 part of methyldimethoxysilane to the ethanol / water mixed solvent in sequence and stir thoroughly for 30 minutes to obtain silane hydrolysate.

[0051] S12. Preheat 200 parts of aluminum powder with a particle size D50 of 25 μm at 110°C for 15 minutes to remove physically adsorbed moisture. Slowly add the preheated aluminum powder to the prepared silane hydrolysate and stir thoroughly using a high-speed disperser to ensure uniform contact between the aluminum powder particles and the silane hydrolysate. Continue stirring at 50°C for 30 minutes. After the reaction is complete, filter the mixture using a filter, wash the filter residue twice with ethanol, dry it at 80°C for 1 hour, and then heat it to 110°C and hold for 1 hour to obtain silanized aluminum powder.

[0052] S13. Take 150 parts of aluminum silanide powder and 2 parts of stearic acid and melt mix them at 150°C. Stir continuously for 2 hours. At this time, the -NH2 of aminopropyltrimethoxysilane reacts with the -COOH of stearic acid to form an amide bond. Stearic acid and aluminum silanide powder are bridged by the amide bond to form a stable interfacial bond and stability, thereby forming a stable coating layer on the outer surface of the aluminum powder, and obtaining coated aluminum powder.

[0053] S14. The coated aluminum powder is continuously stirred at 150°C for 1.5 hours. During this time, the -Si-H of methyldimethoxysilane and the methoxy group (-OCH3) of aminopropyltrimethoxysilane react to generate ≡Si-O-Si≡ linkages. Through the ≡Si-O-Si≡ linkages, a three-dimensional network structure is formed in the coating layer, thereby forming a stable and dense coating layer on the outer surface of the aluminum powder, which is the modified aluminum powder.

[0054] S2. Take 60 parts PC resin, 35 parts ABS resin, 1 part compatibilizer, 3 parts modified aluminum powder, 5 parts toughening agent, 0.3 parts lubricant, 0.3 parts antioxidant 1076, 0.2 parts antioxidant 168, and 0.5 parts UV absorber by weight and add them to a high-speed mixer. Mix the mixture at 400 rpm for 6 minutes to obtain the mixture.

[0055] S3. The mixture is extruded in a twin-screw extruder, cooled and solidified, and then granulated. The granules have a diameter of 2-3 mm and a length of 3-4 mm, which is the metallic silver imitation electroplated PC / ABS composite material. The barrel temperatures are 100℃, 220℃, 220℃, 220℃, 220℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, and 240℃ respectively. The screw speed is 400 r / min, and the vacuum degree (negative pressure) is 0.08 MPa.

[0056] Example 2

[0057] The difference between this embodiment and Embodiment 1 is that:

[0058] Aminopropylmethyldiethoxysilane was used instead of aminopropyltrimethoxysilane. The amounts of aminopropylmethyldiethoxysilane, methyldimethoxysilane, and stearic acid are shown in Table 1.

[0059] S14. Stir the coated aluminum powder continuously at 240℃ for 3.5 hours;

[0060] The amount of modified aluminum powder used is 2 parts;

[0061] Everything else is the same as in Example 1.

[0062] Example 3

[0063] The difference between this embodiment and Embodiment 1 is that:

[0064] γ-aminopropyltriethoxysilane was used instead of aminopropyltrimethoxysilane. The amounts of γ-aminopropyltriethoxysilane, methyldimethoxysilane, and stearic acid are shown in Table 1.

[0065] S14. Stir the coated aluminum powder continuously at 180°C for 3 hours;

[0066] The amount of modified aluminum powder used is 1 part;

[0067] Everything else is the same as in Example 1.

[0068] Example 4

[0069] The difference between this embodiment and Embodiment 1 is that:

[0070] The amounts of aminopropyltrimethoxysilane, methyldimethoxysilane, and stearic acid vary, as detailed in Table 1.

[0071] S14. Stir the coated aluminum powder continuously at 215°C for 2.8 hours;

[0072] The amount of modified aluminum powder used is 2.5 parts;

[0073] Everything else is the same as in Example 1.

[0074] Example 5

[0075] The difference between this embodiment and Embodiment 1 is that:

[0076] The amounts of aminopropyltrimethoxysilane, methyldimethoxysilane, and stearic acid vary, as detailed in Table 1.

[0077] S14. Stir the coated aluminum powder continuously at 225°C for 1.8 hours;

[0078] The amount of modified aluminum powder used is 1.5 parts;

[0079] Everything else is the same as in Example 1.

[0080] Comparative Example 1

[0081] The difference between this comparative example and Example 1 is that step S11 does not include aminopropyltrimethoxysilane, the amount of methyldimethoxysilane used is 2.67 parts, the amount of stearic acid used in S13 is 5.33 parts, and the rest is the same as in Example 1.

[0082] Comparative Example 2

[0083] The difference between this comparative example and Example 1 is that step S11 does not include methyldimethoxysilane, the amount of aminopropyltrimethoxysilane used is 5.71 parts, the amount of stearic acid used in S13 is 2.29 parts, and the rest is the same as in Example 1.

[0084] Comparative Example 3

[0085] The difference between this comparative example and Example 1 is that stearic acid is not included in step S13, the amount of aminopropyltrimethoxysilane is 6.67 parts, the amount of methyldimethoxysilane is 1.33 parts, and the rest is the same as in Example 1.

[0086] Comparative Example 4

[0087] The difference between this comparative example and Example 1 is that step S14 is not included; otherwise, it is the same as Example 1.

[0088] Table 1. Amounts of each raw material used in the metal powder modification process of the examples and comparative examples.

[0089]

[0090] II. Testing Methods

[0091] The performance of the electroplated PC / ABS composite materials prepared in the examples and comparative examples was tested. The specific test items and methods are as follows:

[0092] Density: Tested according to GB / T 1033.1-2008; Impregnation solution: anhydrous ethanol;

[0093] Melt index: Tested according to GB / T 3682.1-2018, 260℃, 5kg;

[0094] Tensile strength: Tested according to GB / T 1040.2-2006, specimen: type 1A, specimen thickness: 4mm, test speed: 50mm / min;

[0095] Bending strength: Tested according to GB / T 9341-2008, specimen size: 80mm×10mm×4mm, test speed: 2mm / min;

[0096] Cantilever beam notched impact strength: Tested according to GB / T 1043.1-2008, specimen: 80mm×10mm×4mm, pendulum energy: 2.75J, notch type: Type A;

[0097] Metallic texture: Visual assessment, rated on a scale of 1 to 5, with 1 being the weakest metallic texture and 5 being the highest.

[0098] Appearance defect assessment: silver streaks, material spots, weld marks, level 1 is the most serious, level 5 is the least serious.

[0099] III. Test Results

[0100] The performance test results of the simulated electroplated PC / ABS composite materials in each embodiment and comparative example are shown in Table 2.

[0101] Table 2. Performance test results of electroplated PC / ABS composite materials in each embodiment and comparative example.

[0102]

[0103] As shown in Table 2, the simulated electroplated PC / ABS composite materials prepared in Examples 1-5 have a tensile strength of 54.1-58.8 MPa, a flexural strength of 88.6-89.9 MPa, a cantilever beam notched impact strength of 25.1-26.3 MPa, a metallic texture grade of 4-5, and an appearance defect grade of 4-5. The simulated electroplated PC / ABS composite materials prepared in Comparative Examples 1-3 lack any one of aminopropyltrimethoxysilane, methyldimethoxysilane, or stearic acid, resulting in poor compatibility between the metal powder and the PC / ABS matrix. Consequently, the mechanical properties and metallic texture of the prepared simulated electroplated PC / ABS composite materials cannot reach the relevant properties of the material prepared in Example 1, and they also have more appearance defects. Therefore, in the preparation method of this application, the raw materials aminopropyltrimethoxysilane, methyldimethoxysilane, and stearic acid have a synergistic effect in improving the compatibility between the metal powder and the PC / ABS matrix, thus resulting in superior mechanical and appearance properties of the simulated electroplated PC / ABS composite materials.

[0104] Comparative Example 4 prepared an electroplated PC / ABS composite material. Due to the absence of step S14, the metal powder coating lacked a three-dimensional network intermediate layer, thus reducing the compatibility between the metal powder and the PC / ABS matrix during processing. Consequently, the mechanical properties and metallic texture of the prepared electroplated PC / ABS composite material could not reach the levels of the material prepared in Example 1, and it also exhibited numerous appearance defects. Therefore, in the preparation method of this application, step S14 plays a crucial role in improving the compatibility between the metal powder and the PC / ABS matrix during processing.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0106] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0107] The present invention has been illustrated with the above embodiments to describe the detailed process flow of the present invention. However, the present invention is not limited to the above detailed process flow, that is, it does not mean that the present invention must rely on the above detailed process flow to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing an electroplated PC / ABS composite material, characterized in that, include: Metal powder is provided, and the metal powder, PC resin, ABS resin, compatibilizer, toughening agent, lubricant, antioxidant and ultraviolet absorber are mixed to obtain a mixture. The mixture is then used to prepare an electroplated PC / ABS composite material through a melt blending process.

2. The method for preparing the electroplated PC / ABS composite material as described in claim 1, characterized in that, The preparation method further includes processing the metal powder to obtain modified metal powder. The processing includes: providing aminosilane and methyldimethoxysilane; hydrolyzing the aminosilane and methyldimethoxysilane to prepare a silane hydrolysate; adding the metal powder to the silane hydrolysate and stirring thoroughly; then filtering, washing and drying to obtain silanized metal powder; reacting the silanized metal powder with an organic acid to obtain coated metal powder; and subjecting the coated metal powder to a post-processing process to obtain modified metal powder.

3. The method for preparing the electroplated PC / ABS composite material as described in claim 2, characterized in that, The post-treatment process involves reacting at 150-240℃ for 1.5-3.5 hours.

4. The method for preparing the electroplated PC / ABS composite material as described in claim 2, characterized in that, The mass ratio of aminosilane, methyldimethoxysilane, and organic acid is 1:0.08-2:0.2-5.

5. The method for preparing the electroplated PC / ABS composite material as described in claim 4, characterized in that, The mass ratio of aminosilane, methyldimethoxysilane, and organic acid is 1:0.3-0.5:1.5-2.

6. The method for preparing the electroplated PC / ABS composite material as described in claim 2, characterized in that, The aminosilane is selected from any one of aminopropyltrimethoxysilane, aminopropylmethyldiethoxysilane, γ-aminopropyltriethoxysilane, and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

7. The method for preparing the electroplated PC / ABS composite material as described in claim 2, characterized in that, At least one of the following conditions must be met: The organic acid is selected from stearic acid; The mass ratio of the modified metal powder to ABS resin is 1-3:35; The modified metal powder includes metal powder and a coating layer located on the outer periphery of the metal powder. The coating layer includes an inner layer, a middle layer and an outer layer from the inside to the outside. The inner layer is a silane layer formed by aminosilane and methyldimethoxysilane on the surface of the metal powder. The middle layer has a three-dimensional network structure and the outer layer is a low surface energy layer.

8. The method for preparing the electroplated PC / ABS composite material as described in claim 1, characterized in that, At least one of the following conditions must be met: The metal powder is selected from aluminum powder; The particle size D50 of the metal powder is 1-50 μm; The melt blending process includes temperature zones, which are sequentially 100-110℃, 220-230℃, 220-230℃, 220-230℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃, 240-250℃.

9. A simulated electroplated PC / ABS composite material, characterized in that, The simulated electroplated PC / ABS composite material is prepared by the preparation method according to any one of claims 1-8.

10. The application of the electroplated PC / ABS composite material of claim 9 in the preparation of automotive interior and exterior trim panels.

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