ABS-aramid fiber-pc composite material and preparation method and application thereof

Abstract

This invention relates to an ABS-aramid fiber-PC composite material, its preparation method, and its application, and relates to the field of ABS material technology. The composite material includes PC resin, ABS resin, aramid fiber, filler, and additives. The shrinkage rate of the PC resin is <0.4%; the flowability of the ABS resin is ≥40 g / 10 min; the filler includes modified coal gangue powder, at least a portion of the surface of which has a surface composed of at least one component of the general formula C. n F 2n+1 The shell is formed by a fluorinated silane coupling agent of -Si(OR1)3. Based on the existing technology, this invention mainly improves the overall performance of ABS-aramid fiber-PC composite materials, such as low-temperature resistance and UV aging resistance, by optimizing the resin matrix phase and introducing modified coal gangue with a specific shell structure. This enables the composite material to fully meet the requirements of electrical equipment housings under extreme working conditions and has broad application prospects.

Description

Technical Field

[0001] This invention relates to the field of ABS material technology, and in particular to an ABS-aramid fiber-PC composite material, its preparation method, and its application. Background Technology

[0002] With the rapid development of the electrical industry, the application scenarios of electrical equipment are becoming increasingly widespread and complex, covering everything from conventional indoor environments to extreme outdoor conditions, such as high-altitude and cold regions and areas with strong ultraviolet radiation. As a key component protecting internal electrical components, the housing of electrical equipment not only needs to possess basic mechanical strength to withstand external physical impacts, but also needs to maintain stable performance in extreme environments to ensure the safe and reliable operation of electrical equipment.

[0003] Traditional materials for electrical equipment enclosures, such as ordinary plastics and metals, are increasingly revealing limitations when facing extreme operating conditions. While metals possess high strength and good conductivity, they are heavy and susceptible to corrosion, especially in humid or corrosive environments, significantly shortening their lifespan. Ordinary plastics, while lightweight and inexpensive, perform poorly in low-temperature resistance and UV aging resistance. At low temperatures, ordinary plastics become brittle, leading to decreased mechanical strength and even cracking; and with prolonged exposure to UV radiation, they undergo aging and degradation, exhibiting discoloration and cracking, severely impacting their performance and lifespan.

[0004] Therefore, developing a composite material with excellent low-temperature resistance and UV aging resistance to meet the requirements of electrical equipment housings in extreme operating environments has become an urgent problem to be solved in the current electrical industry. Summary of the Invention

[0005] To address the above problems, this invention provides an ABS-aramid fiber-PC composite material, its preparation method, and its application.

[0006] In a first aspect, the present invention provides an ABS-aramid fiber-PC composite material, wherein the ABS-aramid fiber-PC composite material comprises PC resin, ABS resin, aramid fiber, filler and additives; The shrinkage rate of the PC resin is <0.4%; The ABS resin has a flowability ≥ 40 g / 10 min; The filler comprises modified coal gangue powder, at least a portion of the surface of which has a surface composed of at least one component of the general formula C. n F 2n+1 The shell is formed by a fluorinated silane coupling agent -Si(OR1)3; where n is any natural number from 8 to 12, and R1 is a C1-C3 alkyl group.

[0007] Furthermore, the shrinkage rate of the PC resin is 0.1~0.2%; And / or, the flowability of the ABS resin is 40~52 g / 10min.

[0008] Furthermore, the preparation method of the modified coal gangue powder includes the following steps: The coal gangue powder raw material is calcined, acid washed and dried, and then ground for the first time. Then, it is added to an alcohol-water solution containing the fluorinated silane coupling agent and heated and stirred to obtain a mixture. The mixture is filtered and the resulting solid is washed, dried, and then ground to obtain the modified coal gangue powder.

[0009] Furthermore, the working conditions for the calcination treatment include: a temperature of 550~600℃ and a time of 90~120min; And / or, the weight ratio of the coal gangue to the fluorinated silane coupling agent is (5~8):1; And / or, the fluorinated silane coupling agent has a mass fraction of 5-10% in the alcohol-water solution; And / or, the operating conditions for heating and stirring include: a temperature of 65~70℃ and a time of 60~90min; And / or, the working conditions parameters for the first grinding and the second grinding include: grinding speed of 100~200 rpm and grinding time of 20~30 min.

[0010] Furthermore, the fluorinated silane coupling agent includes at least one of 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and (1H,1H,2H,2H-perfluorododecane-1-yl)tri(ethoxy)silane.

[0011] Further, by weight, the ABS-aramid fiber-PC composite material comprises the following components: The composition includes 70-80 parts of PC resin, 10-20 parts of ABS resin, 5-10 parts of aramid fiber, 10-15 parts of modified coal gangue powder, 2-5 parts of compatibilizer, 0.5-1.2 parts of lubricant, and 0.3-0.6 parts of antioxidant.

[0012] Further, the aramid fiber includes at least one of poly(p-phenylene terephthalamide) fiber and poly(m-phenylene isophthalamide) fiber; the compatibilizer includes maleic anhydride grafted compatibilizer, which includes at least one of POE-MAH, ABS-MAH, and PS-MAH; the lubricant includes at least one of pentaerythritol ester, polyethylene wax, and ethylene bis-stearamide; and the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 168.

[0013] Secondly, based on the same inventive concept, the present invention provides a method for preparing the ABS-aramid fiber-PC composite material according to any one of the first aspects, wherein the method for preparing the ABS-aramid fiber-PC composite material includes the following steps: The components of the ABS-aramid fiber-PC composite material are premixed to obtain a premixed material; The premixed material is added to a twin-screw extruder for melt extrusion, followed by cooling and granulation to obtain the ABS-aramid fiber-PC composite material.

[0014] Furthermore, the operating parameters of the twin-screw extruder include: temperature of 220~260℃ and rotation speed of 20~30r / min.

[0015] Thirdly, based on the same inventive concept, the present invention provides the application of the ABS-aramid fiber-PC composite material described in any one of the first aspects or the ABS-aramid fiber-PC composite material prepared by the preparation method of the ABS-aramid fiber-PC composite material described in any one of the second aspects in the manufacture of electrical equipment housings.

[0016] The technical solutions provided in the embodiments of the present invention have at least the following advantages compared with the prior art: This invention provides an ABS-aramid fiber-PC composite material, its preparation method, and its applications. Based on existing technologies, this invention primarily improves the overall performance of the ABS-aramid fiber-PC composite material, such as its low-temperature resistance and UV aging resistance, by optimizing the resin matrix phase and introducing modified coal gangue with a specific shell structure. This allows the composite material to fully meet the requirements of electrical equipment housings under extreme operating conditions, demonstrating broad application prospects. Specifically: 1) On the one hand, this invention uses a combination of low-shrinkage PC resin and high-flow-rate ABS resin. The low-shrinkage PC resin has a small volume change during the phase change process, which significantly reduces the accumulation of thermal stress during molding and effectively avoids the generation of micro-defects inside the resin matrix phase. At the same time, the high-flow-rate ABS resin can be more fully dispersed in the PC matrix to form a fine, uniform, and stable "island structure". The two are well-matched and complement each other, which optimizes the structure of the resin matrix phase and inhibits the occurrence of brittle fracture. This not only significantly improves the key mechanical properties of the material, such as toughness, under low-temperature conditions, but also creates favorable conditions for the subsequent introduction of reinforcing phases such as aramid fiber and modified coal gangue powder. This is conducive to improving the coating ability of the resin matrix on the reinforcing phase and the overall density of the material, thereby effectively enhancing the material's resistance to ultraviolet aging.

[0017] 2) On the other hand, the present invention mainly modifies the surface of coal gangue by using a fluorosilane coupling agent containing long perfluoroalkyl flexible segments to form a core-shell structure modified coal gangue powder. This not only enhances the interfacial bonding strength between the coal gangue and the resin matrix, but also further improves the mechanical properties of the material, such as low-temperature toughness, by combining it with aramid fibers. Moreover, by utilizing the ultraviolet shielding effect of fluorosilane, it effectively reduces the photo-oxidative degradation of the resin matrix phase, such as PC segments, and delays yellowing and mechanical property decay, thereby further improving the material's resistance to ultraviolet aging. Detailed Implementation

[0018] 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 will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0019] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0020] In a first aspect, the present invention provides an ABS-aramid fiber-PC composite material, wherein the ABS-aramid fiber-PC composite material comprises PC resin, ABS resin, aramid fiber, filler and additives; The shrinkage rate of the PC resin is <0.4%; The ABS resin has a flowability ≥ 40 g / 10 min; The filler comprises modified coal gangue powder, at least a portion of the surface of which has a surface composed of at least one component of the general formula C. n F 2n+1The shell is formed by a fluorinated silane coupling agent -Si(OR1)3; where n is any natural number from 8 to 12, and R1 is a C1-C3 alkyl group.

[0021] This invention provides an ABS-aramid fiber-PC composite material. Based on the prior art, this invention mainly improves the overall performance of the ABS-aramid fiber-PC composite material, such as low-temperature resistance and UV aging resistance, by optimizing the resin matrix phase and introducing modified coal gangue with a specific shell structure. This enables it to fully meet the requirements of electrical equipment housings in extreme working conditions and has broad application prospects.

[0022] In this invention, the full name of the PC resin is polycarbonate resin (PC), a high molecular polymer containing carbonate groups in its molecular chain. Its shrinkage rate can be determined using existing testing methods such as ASTM D955. The shrinkage rate of the PC resin in this invention can be 0.05%, 0.1%, 0.15%, 0.2%, 0.3%, or any range between these values. In some specific embodiments, the PC resin can be commercially available PC resins with a shrinkage rate <0.4%, such as LG Chem's product models LUPOY GN2403FT (shrinkage rate 0.1~0.2%), LUPOY GN2503FT (shrinkage rate 0.1~0.2%), or LUPOY GN2253F (shrinkage rate 0.1~0.2%).

[0023] In this invention, the full name of the ABS resin mentioned above is Acrylonitrile-Butadiene-Styrene Copolymer (ABS for short), which is a terpolymer obtained by polymerizing three monomers: acrylonitrile (A), butadiene (B), and styrene (S). Its flowability can be determined by referring to existing test methods such as ASTM D1238-20. In this invention, the flowability of ABS resin can be 40g / 10min, 42g / 10min, 45g / 10min, 49g / 10min, 50g / 10min, 52g / 10min, or any range between the above values. In some specific embodiments, the ABS resin mentioned above can be commercially available ABS resins with a flowability ≥ 40 g / 10min, such as LG Chem's product models HF380-M (flowability 40 g / 10min), HF380G (flowability 52 g / 10min), and HF388H (flowability 49 g / 10min).

[0024] In this invention, the aforementioned aramid fiber, also known as aromatic polyamide fiber, is a type of high-performance polyphthalamide fiber made from linear polyamides containing aromatic rings through polycondensation spinning. Representative products include para-aramid (poly(p-phenylene terephthalamide) fiber, trade name Kevlar) and meta-aramid (poly(m-phenylene isophthalamide) fiber, trade name Nomex), etc. In some specific embodiments, the length of the aforementioned aramid fiber can range from 1.0 to 2.0 mm, and the material can be directly commercially available poly(p-phenylene terephthalamide) fiber (aramid 1414), such as product model Kevlar® K29.

[0025] The basic raw material for the modified coal gangue powder in this invention is coal gangue, a solid waste generated during coal mining and washing. Its chemical composition mainly includes 40-60 wt% SiO2 and 15-30 wt% Al2O3. In some specific embodiments, the coal gangue raw material can be directly sourced from coal gangue powder (specific surface area 700 m²) from Hebei Qingfeng Green Energy Solid Waste Disposal Co., Ltd. 2 Commercially available products such as ( / kg, D90≤10μm).

[0026] The general chemical formula of the fluorinated silane coupling agent mentioned above in this invention is C0 n F 2n+1 -Si(OR1)3; where n is any natural number from 8 to 12, for example, 8, 9, 10, 11, 12, and R1 is a C1-C3 straight-chain alkyl group, for example, methyl, ethyl, and propyl.

[0027] In one embodiment of this application, the shrinkage rate of the PC resin is 0.1~0.2%; and / or the flowability of the ABS resin is 40~52 g / 10min. Further screening by this invention revealed that PC resin within the above-mentioned shrinkage rate range and ABS resin within the above-mentioned flowability range exhibit better compatibility, resulting in a superior ABS-aramid fiber-PC composite material in all performance indicators.

[0028] As one embodiment of this application, the preparation method of the modified coal gangue powder includes the following steps: calcining the coal gangue powder raw material, acid washing and drying, and first grinding; then adding an alcohol-water solution containing the fluorosilane coupling agent and heating and stirring to obtain a mixture; filtering the mixture and washing, drying, and second grinding the resulting solid to obtain the modified coal gangue powder. Thus, this invention mainly modifies the surface of coal gangue by using a fluorosilane coupling agent containing long perfluoroalkyl flexible segments, thereby forming a core-shell structured modified coal gangue powder, which is beneficial for improving the low-temperature toughness and UV aging resistance of ABS-aramid fiber-PC composite materials.

[0029] As one embodiment of this application, the working conditions parameters of the calcination treatment include: a temperature of 550~600℃, for example, 550℃, 580℃, 600℃ or any range between the above values; a time of 90~120min, for example, 90min, 110min, 115min, 120min or any range between the above values; and / or, the weight ratio of the coal gangue and the fluorinated silane coupling agent is (5~8):1, for example, 5:1, 6:1, 7.5:1, 8:1 or any range between the above values; and / or, the mass fraction of the fluorinated silane coupling agent in the alcohol-water solution is 5~10%, for example, 5%, 7.5%, 9%, 10% or any of the above values. The working conditions for heating and stirring include: a temperature of 65-70°C, such as 65°C, 68°C, 70°C, or any of the above values; a time of 60-90 min, such as 60 min, 70 min, 85 min, 90 min, or any of the above values; and / or the working conditions for the first and second grinding include: a grinding speed of 100-200 rpm, such as 100 rpm, 150 rpm, 200 rpm, or any of the above values; and a grinding time of 20-30 min, such as 20 min, 25 min, 30 min, or any of the above values.

[0030] As one embodiment of this application, the fluorinated silane coupling agent includes at least one of 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and (1H,1H,2H,2H-perfluorododecane-1-yl)tri(ethoxy)silane, preferably 1H,1H,2H,2H-perfluorodecyltriethoxysilane.

[0031] As one embodiment of this application, the ABS-aramid fiber-PC composite material comprises, by weight, the following components: 70-80 parts of PC resin, 10-20 parts of ABS resin, 5-10 parts of aramid fiber, 10-15 parts of modified coal gangue powder, 2-5 parts of compatibilizer, 0.5-1.2 parts of lubricant, and 0.3-0.6 parts of antioxidant; preferably, by weight, the ABS-aramid fiber-PC composite material comprises the following components: 76 parts of PC resin, 14 parts of ABS resin, 8 parts of aramid fiber, 12 parts of modified coal gangue powder, 4 parts of compatibilizer, 0.8 parts of lubricant, and 0.5 parts of antioxidant.

[0032] In one embodiment of this application, the aramid fiber includes at least one of poly(p-phenylene terephthalamide) fiber and poly(m-phenylene isophthalamide) fiber, preferably poly(p-phenylene terephthalamide) fiber; the compatibilizer includes maleic anhydride grafted compatibilizer, which includes at least one of POE-MAH, ABS-MAH, and PS-MAH, preferably POE-MAH (maleic anhydride grafted polyolefin elastomer); the lubricant includes at least one of pentaerythritol ester, polyethylene wax, and ethylene bis-stearamide, preferably ethylene bis-stearamide; the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 168, preferably antioxidant 1010 and antioxidant 168 are compounded in a weight ratio of 1:2.

[0033] Secondly, based on the same inventive concept, the present invention provides a method for preparing the ABS-aramid fiber-PC composite material according to any one of the first aspects. The method for preparing the ABS-aramid fiber-PC composite material includes the following steps: The components of the ABS-aramid fiber-PC composite material are premixed to obtain a premixed material; The premixed material is added to a twin-screw extruder for melt extrusion, followed by cooling and granulation to obtain the ABS-aramid fiber-PC composite material.

[0034] The preparation method of the ABS-aramid fiber-PC composite material provided in this embodiment of the invention is simple to operate and does not require additional specific equipment. For example, during premixing, an existing high-speed mixer can be used for mixing for 15 to 20 minutes, which is suitable for industrial mass production. At the same time, the preparation method is based on the ABS-aramid fiber-PC composite material described in any one of the first aspects, so it has at least the beneficial effects of the ABS-aramid fiber-PC composite material described in any one of the first aspects, which will not be elaborated here.

[0035] As one embodiment of this application, the operating parameters of the twin-screw extruder include: a temperature of 220~260℃, specifically, the temperature of each section of the twin-screw extruder can be 220℃ in zone one, 240℃ in zone two, 260℃ in zone three, and 250℃ at the die head, etc.; and a rotational speed of 20~30 r / min, for example, 25 r / min.

[0036] Thirdly, based on the same inventive concept, this invention provides the application of the ABS-aramid fiber-PC composite material described in any one of the first aspects, or the ABS-aramid fiber-PC composite material prepared by the preparation method of any one of the second aspects, in the manufacture of electrical equipment housings. This significantly extends the service life of the electrical equipment housing and ensures the safety performance of the electrical equipment.

[0037] It should be noted that, unless otherwise specified or described, the raw materials involved in the ABS-aramid fiber-PC composite material, its preparation method, and its application provided in the embodiments of the present invention can be directly made from commercially available products or by using existing publicly disclosed preparation methods; at the same time, unless otherwise specified or described, the steps and parameters involved can be carried out in accordance with the preparation processes and parameters disclosed in the prior art or by directly using existing equipment, and will not be described in detail in this document.

[0038] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments, unless otherwise specified, are generally performed according to national standards. If no corresponding national standard exists, then generally accepted international standards, conventional conditions, or conditions recommended by the manufacturer are followed.

[0039] The main raw material information involved in the following embodiments and comparative examples is as follows: PC resin 1: Commercially available, product model LUPOY GN2503FT, shrinkage rate 0.1~0.2%.

[0040] PC resin 2: Commercially available, product model LUPOY EF1006F, shrinkage rate 0.7~0.9%.

[0041] ABS resin 1: Commercially available, product model HF380-M, with a flowability of 40 g / 10min.

[0042] ABS Resin 2: Commercially available, product model HF388H, with a flowability of 49 g / 10min.

[0043] ABS resin 3: Commercially available, product model HF380G, with a flowability of 52 g / 10min.

[0044] ABS resin 4: Commercially available, product model HP171, with a flowability of 24 g / 10min.

[0045] Modified coal gangue powder 1: self-made, the preparation method includes the following process: calcining the coal gangue powder raw material at 580℃ for 100min, then sequentially acid washing and drying with 15% hydrochloric acid and first grinding at 150rpm for 25min, followed by adding an 8% fluorinated silane coupling agent (specifically 1H,1H,2H,2H-perfluorodecyltriethoxysilane, the weight ratio of the coal gangue to the fluorinated silane coupling agent is 6:1) in an alcohol-water solution (obtained by mixing ethanol and water at a volume ratio of 1:1 and adjusting the pH to 5.0 with an appropriate amount of glacial acetic acid), and heating and stirring at 68.5℃ for 75min to obtain a mixture; filtering the mixture and washing and drying the resulting solid with water and then grinding it a second time at 150rpm for 25min to obtain the modified coal gangue powder 1.

[0046] Modified coal gangue powder 2: self-made, the preparation method includes the following process: calcining the coal gangue powder raw material at 550℃ for 120min, then sequentially acid washing and drying with 15% hydrochloric acid and first grinding at 100rpm for 30min, followed by adding 5% fluorinated silane coupling agent (specifically (1H,1H,2H,2H-perfluorododecane-1-yl)tri(ethoxy)silane, the weight ratio of the coal gangue and the fluorinated silane coupling agent is 5:1) in an alcohol-water solution (obtained by mixing ethanol and water at a volume ratio of 1:1 and adjusting the pH to 5.0 with an appropriate amount of glacial acetic acid) and heating and stirring at 65℃ for 90min to obtain a mixture; filtering the mixture and washing and drying the resulting solid with water and then grinding it a second time at 100rpm for 30min to obtain the modified coal gangue powder 2.

[0047] Modified coal gangue powder 3: self-made, the preparation method includes the following process: calcining the coal gangue powder raw material at 600℃ for 90min, then sequentially acid washing and drying with 15% hydrochloric acid and first grinding at 200rpm for 20min, followed by adding 5% fluorosilane coupling agent (specifically 1H,1H,2H,2H-perfluorooctyltriethoxysilane, the weight ratio of coal gangue to the fluorosilane coupling agent is 8:1) in an alcohol-water solution (obtained by mixing ethanol and water at a volume ratio of 1:1 and adjusting the pH to 5.0 with an appropriate amount of glacial acetic acid) and heating and stirring at 70℃ for 60min to obtain a mixture; filtering the mixture and washing and drying the resulting solid with water and then grinding it a second time at 200rpm for 20min to obtain the modified coal gangue powder 3.

[0048] Example 1 This example provides an ABS-aramid fiber-PC composite material, which, by weight, comprises the following components: 76 parts PC resin, 14 parts ABS resin, 8 parts aramid fiber, 12 parts modified coal gangue powder, 4 parts compatibilizer, 0.8 parts lubricant, and 0.5 parts antioxidant. Wherein, the PC resin is PC resin 1, the ABS resin is ABS resin 2, the aramid fiber is poly(p-phenylene terephthalamide) fiber, the modified coal gangue powder is modified coal gangue powder 1, the compatibilizer is POE-MAH, the lubricant is ethylene bis-stearamide, and the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:2.

[0049] The preparation method of the above-mentioned ABS-aramid fiber-PC composite material includes the following steps: The components of the ABS-aramid fiber-PC composite material are premixed to obtain a premixed material; The premixed material was added to a twin-screw extruder for melt extrusion, followed by cooling and granulation to obtain the ABS-aramid fiber-PC composite material. The operating parameters of the twin-screw extruder include: a temperature of 220~260℃, specifically, the temperatures of each section of the twin-screw extruder can be 220℃ in zone one, 240℃ in zone two, 260℃ in zone three, and 250℃ at the die head; and a rotational speed of 25 r / min.

[0050] Example 2 This example provides an ABS-aramid fiber-PC composite material, which, by weight, comprises the following components: 70 parts PC resin, 10 parts ABS resin, 5 parts aramid fiber, 10 parts modified coal gangue powder, 2 parts compatibilizer, 0.5 parts lubricant, and 0.3 parts antioxidant. Wherein, the PC resin is PC resin 1, the ABS resin is ABS resin 1, the aramid fiber is poly(p-phenylene terephthalamide) fiber, the modified coal gangue powder is modified coal gangue powder 2, the compatibilizer is ABS-MAH, the lubricant is polyethylene wax, and the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:2.

[0051] The preparation method of the above ABS-aramid fiber-PC composite material is the same as that in Example 1.

[0052] Example 3 This example provides an ABS-aramid fiber-PC composite material, which, by weight, comprises the following components: 80 parts PC resin, 20 parts ABS resin, 10 parts aramid fiber, 15 parts modified coal gangue powder, 5 parts compatibilizer, 1.2 parts lubricant, and 0.6 parts antioxidant. Wherein, the PC resin is PC resin 1, the ABS resin is ABS resin 3, the aramid fiber is poly(p-phenylene terephthalamide) fiber, the modified coal gangue powder is modified coal gangue powder 3, the compatibilizer is ABS-MAH, the lubricant is polyethylene wax, and the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:2.

[0053] The preparation method of the above ABS-aramid fiber-PC composite material is the same as that in Example 1.

[0054] Comparative Example 1 This example provides an ABS-aramid fiber-PC composite material and its preparation method, which differs from Example 1 only in that: (1) The PC resin in Example 1 was changed to PC resin 2.

[0055] Comparative Example 2 This example provides an ABS-aramid fiber-PC composite material and its preparation method, which differs from Example 1 only in that: (1) The ABS resin in Example 1 was changed to ABS resin 4.

[0056] Comparative Example 3 This example provides an ABS-aramid fiber-PC composite material and its preparation method, which differs from Example 1 only in that: (1) The fluorinated silane coupling agent used to prepare modified coal gangue powder 1 in Example 1 was adjusted to KH-550 coupling agent (γ-aminopropyltriethoxysilane).

[0057] Test Example 1 This example aims to examine the mechanical properties of the ABS-aramid fiber-PC composite materials obtained in Examples 1-3 and Comparative Examples 1-3 above; among them, the room temperature notched impact strength (23℃, KJ / m) is... 2 ) and low-temperature notched impact strength (-40℃, KJ / m 2 All tests were conducted in accordance with standard ISO 179, and the tensile strength (MPa) was tested in accordance with standard ISO 527. The test results are shown in Table 1.

[0058] Table 1

[0059] As shown in Table 1, compared with Comparative Examples 1-3, the ABS-aramid fiber-PC composite materials provided in Examples 1-3 of the present invention have better mechanical properties, especially the low-temperature notched impact strength is significantly improved. This indicates that the present invention can effectively improve the low-temperature toughness and other mechanical properties of the material by optimizing the resin matrix phase and introducing modified coal gangue with a specific shell structure.

[0060] Test Example 2 Based on Test Example 1, this invention further tests the UV aging resistance of the ABS-aramid fiber-PC composite materials obtained in Examples 1-3 and Comparative Example 3. The materials were injection molded into color plates 60mm wide, 80mm long, and 3mm thick, placed in a UV lamp box, and irradiated with UVB-313 lamps for 8 hours, with a black panel temperature of 60℃ and a UV intensity of 0.55W / m². 2 @310nm; under the conditions of condensation for 4 hours and blackboard temperature of 60℃, color difference test was performed after 14 cycles of 168 hours of light exposure, and the color difference value △E before and after the test was calculated; the test results are shown in Table 2. Among them, the smaller the color difference value △E, the better the anti-ultraviolet aging performance.

[0061] Table 2

[0062] As shown in Table 2, the color difference value ΔE of the ABS-aramid fiber-PC composite materials provided in Examples 1-3 of the present invention is maintained below 6.0 and is significantly lower than that of Comparative Example 3, indicating that it has excellent UV aging resistance.

[0063] In summary, the embodiments of the present invention provide an ABS-aramid fiber-PC composite material, its preparation method, and its application. Based on the prior art, the present invention mainly improves the comprehensive properties of the ABS-aramid fiber-PC composite material, such as low-temperature resistance and UV aging resistance, by optimizing the resin matrix phase and introducing modified coal gangue with a specific shell structure. This enables the composite material to fully meet the requirements of electrical equipment housings under extreme working conditions and has broad application prospects.

[0064] Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a hard limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible subranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the range referred to.

[0065] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An ABS-aramid fiber-PC composite material, characterized in that, The ABS-aramid fiber-PC composite material comprises the following components in parts by weight: 70-80 parts PC resin, 10-20 parts ABS resin, 5-10 parts aramid fiber, 10-15 parts modified coal gangue powder, 2-5 parts compatibilizer, 0.5-1.2 parts lubricant, and 0.3-0.6 parts antioxidant; The PC resin is LUPOY GN2503FT; The ABS resin is selected from at least one of HF380-M, HF388H and HF380G; The modified coal gangue powder has at least a portion of its surface having a composition of at least one general formula C. n F 2n+1 The shell is formed by a fluorinated silane coupling agent -Si(OR1)3; where n is any natural number from 8 to 12, and R1 is a C1-C3 alkyl group.

2. The ABS-aramid fiber-PC composite material according to claim 1, characterized in that, The method for preparing the modified coal gangue powder The process includes the following: The coal gangue powder raw material is calcined, acid washed and dried, and then ground for the first time. Then, it is added to an alcohol-water solution containing the fluorinated silane coupling agent and heated and stirred to obtain a mixture. The mixture is filtered and the resulting solid is washed, dried, and then ground to obtain the modified coal gangue powder.

3. The ABS-aramid fiber-PC composite material according to claim 2, characterized in that, The working conditions for the calcination treatment include: a temperature of 550~600℃ and a time of 90~120min; And / or, the weight ratio of the coal gangue to the fluorinated silane coupling agent is (5~8):1; And / or, the fluorinated silane coupling agent has a mass fraction of 5-10% in the alcohol-water solution; And / or, the operating conditions for heating and stirring include: a temperature of 65~70℃ and a time of 60~90min; And / or, the working conditions parameters for the first grinding and the second grinding include: grinding speed of 100~200 rpm and grinding time of 20~30 min.

4. The ABS-aramid fiber-PC composite material according to claim 1, characterized in that, The fluorinated silane coupling agent includes at least one of 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and (1H,1H,2H,2H-perfluorododecane-1-yl)tri(ethoxy)silane.

5. The ABS-aramid fiber-PC composite material according to claim 1, characterized in that, The aramid fiber includes at least one of poly(p-phenylene terephthalamide) fiber and poly(m-phenylene isophthalamide) fiber; the compatibilizer includes maleic anhydride grafted compatibilizer, which includes at least one of POE-MAH, ABS-MAH, and PS-MAH; the lubricant includes at least one of pentaerythritol ester, polyethylene wax, and ethylene bis-stearamide; and the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 168.

6. A method for preparing the ABS-aramid fiber-PC composite material according to any one of claims 1 to 5, characterized in that, The preparation method of the ABS-aramid fiber-PC composite material includes the following steps: The components of the ABS-aramid fiber-PC composite material are premixed to obtain a premixed material; The premixed material is added to a twin-screw extruder for melt extrusion, followed by cooling and granulation to obtain the ABS-aramid fiber-PC composite material.

7. The method for preparing the ABS-aramid fiber-PC composite material according to claim 6, characterized in that, The operating parameters of the twin-screw extruder include: temperature of 220~260℃ and rotation speed of 20~30r / min.

8. The application of an ABS-aramid fiber-PC composite material according to any one of claims 1 to 5, or an ABS-aramid fiber-PC composite material prepared by the preparation method of any one of claims 6 to 7, in the manufacture of electrical equipment housings.

Images