Composite material based on recycled ABS (Acrylonitrile Butadiene Styrene) plastic and preparation method thereof
By grafting the surfaces of bamboo fibers and recycled ABS plastics, their compatibility with carboxylated polyphenylene sulfides are improved, and composite materials with improved wetting, mechanical properties and ionic conductivity are prepared, solving the disadvantages of the existing polyphenylene sulfide separators.
Patent Information
- Application Number
- CN202510139792.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-05-30
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing polyphenylene sulfide separators have disadvantages such as poor hydrophilicity, high resistance, and poor air isolation, resulting in higher energy consumption and lower safety. At the same time, the polyphenylene sulfide is poor in compatibility with other substances when forming composite materials.
By grafting the surfaces of bamboo fibers and regenerated ABS plastics, long carbon chains and quaternary ammonium groups are introduced to improve their compatibility with carboxylated polyphenylene sulfides, and composite materials are prepared by mixed spinning, thermal stretching and shaping processes.
The wetting properties, mechanical properties and ionic conductivity of the composite material are improved, and the interface bonding and electrical properties with polyphenylene sulfide are enhanced.
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Figure SMS_1
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of polymer materials, and specifically relates to a composite material based on recycled ABS plastic and a preparation method thereof. Background Art
[0002] High-performance polyphenylene sulfide (PPS) composite diaphragms are mainly based on the development needs of alkaline electrolytic water hydrogen production technology. As a key part of the electrolytic cell, the diaphragm's main function is to conduct and block gases, preventing the mixing of hydrogen and oxygen to produce explosive gases. In alkaline electrolytic cells, the performance of the diaphragm directly affects the hydrogen purity and hydrogen production power consumption. The early used asbestos diaphragms have been gradually phased out due to swelling and toxicity problems, while polyphenylene sulfide diaphragms have become the mainstream choice due to their excellent heat resistance, mechanical strength, and electrical properties. However, polyphenylene sulfide diaphragms have disadvantages such as poor hydrophilicity, high resistance, and poor gas barrier properties, resulting in higher energy consumption and lower safety. At the same time, the treatment and recycling of waste ABS plastic are also an important environmental protection topic. However, when polyphenylene sulfide forms a composite material with other substances, the compatibility is relatively poor.
[0003] Therefore, to solve the above problems, the present invention prepares a composite material based on recycled ABS plastic. Summary of the Invention
[0004] The purpose of the present invention is to provide a composite material based on recycled ABS plastic and a preparation method thereof to solve the problems raised in the prior art.
[0005] To achieve the above purpose, the present invention provides the following technical solutions: A preparation method of a composite material based on recycled ABS plastic, comprising the following steps: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fiber to obtain a resin masterbatch; wherein the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:(5 - 6):(20 - 25); Step 2: Subject the resin masterbatch to melt spinning, hot stretching, and shaping in sequence to obtain mixed fibers, and then perform weaving to obtain the composite material.
[0006] Preferably: The preparation process of the composite ABS plastic is as follows: By weight, mix 100 - 120 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 12 - 14 parts of modified acrylonitrile-butadiene-styrene plastic, 1 - 2 parts of methyl methacrylate-butadiene-styrene terpolymer, 0.1 - 0.2 parts of antioxidant, 0.1 - 0.3 parts of dispersant, and 0.2 - 0.3 parts of lubricant, stir, and melt extrude and pelletize through a twin-screw extruder at a temperature of 200 - 210°C to obtain the composite ABS plastic.
[0007] More preferably: The preparation process of the modified bamboo fiber is as follows: S1: Add bamboo fiber and 3-aminopropyltriethoxysilane to an ethanol aqueous solution, heat up to 100 - 120 °C, stir for 1 - 2 h, filter by suction, and dry in vacuum to obtain amino-functionalized bamboo fiber; S2: Add the amino-functionalized bamboo fiber, N-carboxymethylamino-2-ethanol, and triethylamine to N,N-dimethylformamide, heat up to 80 - 100 °C, stir for 1 - 2 h, cool, distill off the solvent under reduced pressure, recrystallize, and dry in vacuum to obtain an intermediate product; S3: Add the intermediate product, 4-hydroxyphenethyl bromide, and potassium carbonate to dichloromethane, stir ultrasonically for 20 - 25 min, then reflux and react at 100 - 120 °C for 5 - 6 h, distill off dichloromethane under reduced pressure, and then recrystallize with an acetone-ethanol mixed solution for 2 - 3 times, and dry in vacuum to obtain the modified bamboo fiber.
[0008] More preferably: The amino-functionalized bamboo fiber comprises the following components: by weight, 20 - 25 parts of bamboo fiber, 10 - 12 parts of 3-aminopropyltriethoxysilane, and 100 - 150 parts of ethanol aqueous solution.
[0009] More preferably: The intermediate product comprises the following components: by weight, 10 - 12 parts of amino-functionalized bamboo fiber, 25 - 28 parts of N-carboxymethylamino-2-ethanol, 0.1 - 0.2 parts of triethylamine, and 200 - 250 parts of N,N-dimethylformamide.
[0010] More preferably: The modified bamboo fiber comprises the following components: by weight, 12 - 15 parts of intermediate product, 6 - 8 parts of 4-hydroxyphenethyl bromide, 0.2 - 0.3 parts of potassium carbonate, and 100 - 120 parts of dichloromethane.
[0011] More preferably: The preparation process of the modified acrylonitrile-butadiene-styrene plastic is as follows: Mix recycled acrylonitrile-butadiene-styrene plastic, glycidyl methacrylate, styrene, and diisopropylbenzene peroxide evenly, then use a twin-screw extruder to melt graft at 170 - 210 °C and a rotation speed of 90 r / min, pelletize, and dry to obtain the modified acrylonitrile-butadiene-styrene plastic.
[0012] More preferably: The modified acrylonitrile-butadiene-styrene plastic comprises the following components: by weight, 100 - 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 5 - 8 parts of glycidyl methacrylate, 5 - 8 parts of styrene, and 0.3 - 0.5 parts of diisopropylbenzene peroxide.
[0013] Preferably, the antioxidant includes one or more of pentaerythritol tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and tris(2,4-di-tert-butylphenyl) phosphite; The dispersant includes one or more of monoglyceryl stearate, glyceryl tristearate, and ethylene bisstearamide; The lubricant includes one or more of silicone, silicone oil, and pentaerythritol stearate.
[0014] Preferably, the temperature of the melt spinning is 200-250 °C, the temperature of the hot stretching is 90-120 °C, and the temperature of the shaping is 190-200 °C.
[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The present invention respectively conducts graft modification on the surfaces of bamboo fiber and rABS, effectively improving the compatibility between the two and polyphenylene sulfide, thereby enhancing the wettability, mechanical properties, and ionic conductivity of the prepared composite material. Specifically as follows: Bamboo fiber is a natural material with a large number of hydroxyl groups on its surface, showing strong hydrophilicity. However, rABS and polyphenylene sulfide are non-polar materials, which results in poor compatibility and interfacial adhesion between bamboo fiber and the two. At the same time, a high-performance polyphenylene sulfide membrane requires good hydrophilicity to reduce the internal resistance of the electrolytic cell. Therefore, to solve this problem, (1) The present invention first chemically modifies the surface of bamboo fiber, introducing a longer carbon chain to increase its interfacial contact area with rABS and polyphenylene sulfide, thereby enhancing the physical entanglement and chemical bonding between bamboo fiber and rABS and improving the interfacial adhesion of the composite material. At the same time, in order to further improve the ionic conductivity of the composite material, a quaternary ammonium salt group is introduced into the scheme, effectively increasing the cation concentration in the electrolyte; (2) The present invention also uses glycidyl methacrylate to conduct graft modification on rABS. The grafted epoxy group can react with the hydroxyl groups on the surface of the modified bamboo fiber and the carboxyl groups on the surface of carboxylated polyphenylene sulfide, further reducing the interfacial tension between the two phases and playing a compatibilizing role at the interface, increasing the viscosity of the system and reducing the fluidity. At the same time, since rABS will undergo an aging phenomenon, the epoxy group can also react with its aged hydroxyl and carboxyl groups, thereby achieving the purpose of repairing rABS. Detailed implementation manners
[0016] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0017] It should be noted that the following parts are in parts by weight, and there are no special restrictions on the purchase manufacturers of all raw materials involved in the present invention. Exemplarily, in the following examples, N-carboxymethylamino-2-ethanol has a CAS of 5835-28-9; 4-hydroxyphenethyl bromide has a CAS of 14140-15-9; 3-aminopropyltriethoxysilane has a CAS of 919-30-2; glycidyl methacrylate has a CAS of 106-91-2.
[0018] Pre-preparation: The preparation process of carboxylated polyphenylene sulfide is as follows: Using anhydrous sodium sulfide, p-dichlorobenzene and 2,5-dichlorobenzoic acid, N-methylpyrrolidone as the solvent, isopropyl titanate as the catalyst, and nitrogen as the protective gas, reacting at 280 °C for 2.5 h in an alkaline environment, washing, filtering, and drying to obtain carboxylated polyphenylene sulfide.
[0019] Example 1: A preparation method of a composite material based on recycled ABS plastic, including the following processes: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fiber to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:5:20; Step 2: Melt-spin, hot-stretch, and shape the resin masterbatch in sequence to obtain mixed fibers, and then perform weaving to obtain a composite material; Among them, the preparation process of the composite ABS plastic is as follows: Mix 100 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 12 parts of modified acrylonitrile-butadiene-styrene plastic, 1 part of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.1 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.1 part of dispersant (monoglyceryl stearate), and 0.2 part of lubricant (silicone oil), stir and mix, and melt-extrude and pelletize through a twin-screw extruder at a temperature of 200 °C to obtain composite ABS plastic; The preparation process of the modified bamboo fiber is as follows: S1: Add 20 parts of bamboo fiber and 10 parts of 3-aminopropyltriethoxysilane to 100 parts of an ethanol aqueous solution, heat up to 100 °C, stir for 1 h, filter by suction, and vacuum dry to obtain amino-functionalized bamboo fiber; S2: Add 10 parts of amino-functionalized bamboo fiber, 25 parts of N-carboxymethylamino-2-ethanol, and 0.1 part of triethylamine to 200 parts of N,N-dimethylformamide, heat up to 80 °C, stir for 1 h, cool, distill off the solvent under reduced pressure, recrystallize, and vacuum dry to obtain an intermediate; S3: Add 12 parts of the intermediate, 6 parts of 4 - hydroxy phenethyl bromide, and 0.2 part of potassium carbonate into 100 parts of dichloromethane, stir ultrasonically for 20 min, then reflux and react at 100 °C for 5 h, distill off dichloromethane under reduced pressure, and then recrystallize with an acetone - ethanol mixed solution for 2 times. After vacuum drying, modified bamboo fibers are obtained. The preparation process of modified acrylonitrile - butadiene - styrene plastic is as follows: Mix 100 parts of recycled acrylonitrile - butadiene - styrene plastic, 5 parts of glycidyl methacrylate, 5 parts of styrene, and 0.3 part of di - isopropylbenzene peroxide evenly, then use a twin - screw extruder to melt - graft at 170 °C and a rotation speed of 90 r / min. After pelletizing, dry to obtain modified acrylonitrile - butadiene - styrene plastic.
[0020] Example 2: A preparation method of a composite material based on recycled ABS plastic, including the following processes: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fibers to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:25. Step 2: Melt - spin, hot - stretch, and shape the resin masterbatch in sequence to obtain mixed fibers, and then weave to obtain the composite material. Among them, the preparation process of the composite ABS plastic is as follows: Mix 120 parts of recycled acrylonitrile - butadiene - styrene plastic (rABS), 14 parts of modified acrylonitrile - butadiene - styrene plastic, 2 parts of methyl methacrylate - butadiene - styrene terpolymer (MBS), 0.2 part of antioxidant (tris[2,4 - di - tert - butylphenyl] phosphite), 0.3 part of dispersant (monoglyceryl stearate), and 0.3 part of lubricant (silicone oil) and stir. Through a twin - screw extruder, melt - extrude at a temperature of 210 °C, pelletize to obtain the composite ABS plastic. The preparation process of the modified bamboo fibers is as follows: S1: Add 25 parts of bamboo fibers and 12 parts of 3 - aminopropyltriethoxysilane into 150 parts of an ethanol - water solution, heat up to 120 °C, stir for 2 h, filter by suction, and vacuum - dry to obtain amino - modified bamboo fibers. S2: Add 12 parts of amino - modified bamboo fibers, 28 parts of N - carboxymethylamino - 2 - ethanol, and 0.2 part of triethylamine into 250 parts of N,N - dimethylformamide, heat up to 100 °C, stir for 2 h, cool, distill off the solvent under reduced pressure, recrystallize, and vacuum - dry to obtain the intermediate. S3: Add 15 parts of the intermediate, 8 parts of 4-hydroxy phenethyl bromide, and 0.3 part of potassium carbonate into 120 parts of dichloromethane, stir ultrasonically for 25 min, then reflux and react at 120 °C for 6 h, distill off dichloromethane under reduced pressure, and then perform recrystallization with an acetone-ethanol mixed solution for 3 times. After vacuum drying, modified bamboo fibers are obtained. The preparation process of the modified acrylonitrile-butadiene-styrene plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 8 parts of glycidyl methacrylate, 8 parts of styrene, and 0.5 part of diisopropylbenzene peroxide evenly, then use a twin-screw extruder to melt and graft at 210 °C and a rotation speed of 90 r / min. After granulation, dry to obtain the modified acrylonitrile-butadiene-styrene plastic.
[0021] Example 3: A preparation method of a composite material based on recycled ABS plastic, including the following processes: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fibers to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:25. Step 2: Melt-spin, hot-stretch, and shape the resin masterbatch in sequence to obtain mixed fibers, and then perform weaving to obtain the composite material. Among them, the preparation process of the composite ABS plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 13 parts of modified acrylonitrile-butadiene-styrene plastic, 1.5 parts of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.15 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.2 part of dispersant (monoglyceryl stearate), and 0.25 part of lubricant (silicone oil) and stir. Through a twin-screw extruder, melt and extrude at a temperature of 200 °C, and granulate to obtain the composite ABS plastic. The preparation process of the modified bamboo fibers is as follows: S1: Add 22 parts of bamboo fibers and 11 parts of 3-aminopropyltriethoxysilane into 120 parts of an ethanol aqueous solution, heat up to 110 °C, stir for 1.5 h, filter by suction, and dry under vacuum to obtain aminated bamboo fibers. S2: Add 11 parts of aminated bamboo fibers, 26 parts of N-carboxymethylamino-2-ethanol, and 0.15 part of triethylamine into 220 parts of N,N-dimethylformamide, heat up to 90 °C, stir for 1.5 h, cool, distill off the solvent under reduced pressure, perform recrystallization, and dry under vacuum to obtain the intermediate. S3: Add 13 parts of the intermediate, 7 parts of 4-hydroxy phenethyl bromide, and 0.25 part of potassium carbonate into 110 parts of dichloromethane, stir ultrasonically for 22 min, then reflux and react at 110 °C for 5.5 h, distill off dichloromethane under reduced pressure, and then perform recrystallization with an acetone-ethanol mixed solution twice. After vacuum drying, modified bamboo fibers are obtained. The preparation process of the modified acrylonitrile-butadiene-styrene plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 6 parts of glycidyl methacrylate, 6 parts of styrene, and 0.35 part of diisopropylbenzene peroxide evenly, then use a twin-screw extruder to melt and graft at 210 °C and a rotation speed of 90 r / min. After pelletizing, dry to obtain the modified acrylonitrile-butadiene-styrene plastic.
[0022] Example 4: A preparation method of a composite material based on recycled ABS plastic, including the following processes: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fibers to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:25. Step 2: Melt-spin, hot-stretch, and shape the resin masterbatch in sequence to obtain mixed fibers, and then perform weaving to obtain the composite material. Among them, the preparation process of the composite ABS plastic is as follows: Mix 100 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 12 parts of modified acrylonitrile-butadiene-styrene plastic, 1 part of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.1 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.1 part of dispersant (monoglyceryl stearate), and 0.2 part of lubricant (silicone oil) and stir. Through a twin-screw extruder, melt extrude at a temperature of 200 °C, pelletize to obtain the composite ABS plastic. The preparation process of the modified bamboo fibers is as follows: S1: Add 25 parts of bamboo fibers and 12 parts of 3-aminopropyltriethoxysilane into 150 parts of an ethanol aqueous solution, heat up to 120 °C, stir for 2 h, filter by suction, and dry under vacuum to obtain aminated bamboo fibers. S2: Add 12 parts of aminated bamboo fibers, 28 parts of N-carboxymethylamino-2-ethanol, and 0.2 part of triethylamine into 250 parts of N,N-dimethylformamide, heat up to 100 °C, stir for 2 h, cool, distill off the solvent under reduced pressure, perform recrystallization, and dry under vacuum to obtain the intermediate. S3: Add 15 parts of the intermediate, 8 parts of 4-hydroxy phenethyl bromide, and 0.3 part of potassium carbonate into 120 parts of dichloromethane, stir ultrasonically for 25 min, then reflux and react at 120 °C for 6 h, distill off dichloromethane under reduced pressure, and then recrystallize with an acetone-ethanol mixed solution for 3 times. After vacuum drying, modified bamboo fibers are obtained. The preparation process of modified acrylonitrile-butadiene-styrene plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 6 parts of glycidyl methacrylate, 6 parts of styrene, and 0.35 part of diisopropylbenzene peroxide evenly, then use a twin-screw extruder to carry out melt grafting at 210 °C and a rotation speed of 90 r / min. After pelletizing, dry to obtain modified acrylonitrile-butadiene-styrene plastic.
[0023] Comparative Example 1: Only use a silane coupling agent to modify bamboo fibers, and the rest is the same as in Example 4, specifically as follows: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fibers to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:25. Step 2: Carry out melt spinning, hot stretching, and shaping on the resin masterbatch in sequence to obtain mixed fibers, and then carry out weaving to obtain a composite material. Among them, the preparation process of the composite ABS plastic is as follows: Mix 100 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 12 parts of modified acrylonitrile-butadiene-styrene plastic, 1 part of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.1 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.1 part of dispersant (monoglyceryl stearate), and 0.2 part of lubricant (silicone oil) and stir. Through a twin-screw extruder, melt extrude and pelletize at a temperature of 200 °C to obtain the composite ABS plastic. The preparation process of modified bamboo fibers is as follows: Add 25 parts of bamboo fibers and 12 parts of 3-aminopropyltriethoxysilane into 150 parts of an ethanol aqueous solution, heat up to 120 °C, stir for 2 h, carry out suction filtration, and vacuum dry to obtain modified bamboo fibers. The preparation process of modified acrylonitrile-butadiene-styrene plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 6 parts of glycidyl methacrylate, 6 parts of styrene, and 0.35 part of diisopropylbenzene peroxide evenly, then use a twin-screw extruder to carry out melt grafting at 210 °C and a rotation speed of 90 r / min. After pelletizing, dry to obtain modified acrylonitrile-butadiene-styrene plastic.
[0024] Comparative Example 2: Do not add modified acrylonitrile-butadiene-styrene plastic, and the rest is the same as in Example 4, specifically as follows: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fiber to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:25; Step 2: Subject the resin masterbatch to melt spinning, hot stretching, and shaping in sequence to obtain mixed fibers, and then perform weaving to obtain a composite material; Among them, the preparation process of the composite ABS plastic is as follows: Mix 100 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 1 part of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.1 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.1 part of dispersant (monoglyceryl stearate), and 0.2 part of lubricant (silicone oil), stir, and melt extrude and pelletize through a twin-screw extruder at a temperature of 200 °C to obtain the composite ABS plastic; The preparation process of the modified bamboo fiber is as follows: S1: Add 25 parts of bamboo fiber and 12 parts of 3-aminopropyltriethoxysilane to 150 parts of an ethanol aqueous solution, heat to 120 °C, stir for 2 h, filter by suction, and dry under vacuum to obtain amino-functionalized bamboo fiber; S2: Add 12 parts of amino-functionalized bamboo fiber, 28 parts of N-carboxymethylamino-2-ethanol, and 0.2 part of triethylamine to 250 parts of N,N-dimethylformamide, heat to 100 °C, stir for 2 h, cool, distill off the solvent under reduced pressure, recrystallize, and dry under vacuum to obtain an intermediate; S3: Add 15 parts of the intermediate, 8 parts of 4-hydroxyphenethyl bromide, and 0.3 part of potassium carbonate to 120 parts of dichloromethane, ultrasonically stir for 25 min, then reflux at 120 °C for 6 h, distill off dichloromethane under reduced pressure, and recrystallize with an acetone-ethanol mixed solution 3 times, and dry under vacuum to obtain the modified bamboo fiber.
[0025] Comparative Example 3: Add an excessive amount of modified bamboo fiber, and the rest is the same as in Example 4, specifically as follows: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic, and modified bamboo fiber to obtain a resin masterbatch; the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:6:50; Step 2: Subject the resin masterbatch to melt spinning, hot stretching, and shaping in sequence to obtain mixed fibers, and then perform weaving to obtain a composite material; Among them, the preparation process of the composite ABS plastic is as follows: Mix 100 parts of recycled acrylonitrile-butadiene-styrene plastic (rABS), 12 parts of modified acrylonitrile-butadiene-styrene plastic, 1 part of methyl methacrylate-butadiene-styrene terpolymer (MBS), 0.1 part of antioxidant (tris[2,4-di-tert-butylphenyl] phosphite), 0.1 part of dispersant (monoglyceryl stearate), and 0.2 part of lubricant (silicone oil) by stirring. Then, through a twin-screw extruder, melt and extrude at a temperature of 200 °C, and granulate to obtain the composite ABS plastic; The preparation process of the modified bamboo fiber is as follows: S1: Add 25 parts of bamboo fiber and 12 parts of 3-aminopropyltriethoxysilane to 150 parts of an ethanol aqueous solution, heat up to 120 °C, stir for 2 h, filter by suction, and dry in vacuum to obtain amino-functionalized bamboo fiber; S2: Add 12 parts of amino-functionalized bamboo fiber, 28 parts of N-carboxymethylamino-2-ethanol, and 0.2 part of triethylamine to 250 parts of N,N-dimethylformamide, heat up to 100 °C, stir for 2 h, cool, distill off the solvent under reduced pressure, recrystallize, and dry in vacuum to obtain an intermediate; S3: Add 15 parts of the intermediate, 8 parts of 4-hydroxyphenethyl bromide, and 0.3 part of potassium carbonate to 120 parts of dichloromethane, stir ultrasonically for 25 min, then reflux and react at 120 °C for 6 h, distill off dichloromethane under reduced pressure, and then recrystallize with an acetone-ethanol mixed solution for 3 times. After drying in vacuum, obtain the modified bamboo fiber; The preparation process of the modified acrylonitrile-butadiene-styrene plastic is as follows: Mix 110 parts of recycled acrylonitrile-butadiene-styrene plastic, 6 parts of glycidyl methacrylate, 6 parts of styrene, and 0.35 part of diisopropylbenzene peroxide evenly. Then, use a twin-screw extruder to melt-graft at 210 °C and a rotation speed of 90 r / min. After granulation, dry to obtain the modified acrylonitrile-butadiene-styrene plastic.
[0026] Performance test: Detect the electrolyte absorption rate and tensile strength of the composite materials obtained in Examples 1-4 and Comparative Examples 1-3. The data obtained are shown in the following table:
[0027] Table 1 Conclusion: In Examples 1-4, the surfaces of bamboo fiber and rABS were graft-modified respectively, effectively improving the compatibility between the two and polyphenylene sulfide, so that the obtained composite materials were improved in wettability, mechanical properties and ionic conductivity. In Comparative Example 1, only silane coupling agent was used to modify bamboo fiber, and long carbon chains were not introduced, resulting in reduced dispersion and compatibility of bamboo fiber in the matrix. At the same time, due to the lack of quaternary ammonium salt groups, the ionic mobility of the composite material was also reduced; in Comparative Example 2, modified acrylonitrile-butadiene-styrene plastic was not added, lacking its bridging effect, resulting in reduced compatibility between bamboo fiber and rABS and the matrix, and decreased performance; in Comparative Example 3, an excessive amount of modified bamboo fiber was added, destroying the continuity of the matrix and leading to an overall decline of the composite material.
[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A method for preparing a composite material based on recycled ABS plastic, characterized in that: The following steps are involved: Step 1: Mix carboxylated polyphenylene sulfide, composite ABS plastic and modified bamboo fiber to obtain a resin masterbatch; wherein the mass ratio of carboxylated polyphenylene sulfide to composite ABS plastic is 100:(5-6):(20-25); Step 2: The resin masterbatch is melt-spun, heat-stretched and shaped in sequence to obtain mixed fibers, which are then woven to obtain a composite material.
2. The method for preparing a composite material based on recycled ABS plastic according to claim 1, characterized in that: The preparation process of the composite ABS plastic is as follows: by weight, 100-120 parts of recycled acrylonitrile-butadiene-styrene plastic, 12-14 parts of modified acrylonitrile-butadiene-styrene plastic, 1-2 parts of methyl methacrylate-butadiene-styrene terpolymer, 0.1-0.2 parts of antioxidant, 0.1-0.3 parts of dispersant and 0.2-0.3 parts of lubricant are mixed and stirred, and melt-extruded and granulated through a twin-screw extruder at a temperature of 200-210° C. to obtain the composite ABS plastic.
3. The method for preparing a composite material based on recycled ABS plastic according to claim 1, characterized in that: The preparation process of the modified bamboo fiber is as follows: S1: adding bamboo fiber and 3-aminopropyltriethoxysilane to an ethanol aqueous solution, heating to 100-120° C., stirring for 1-2 hours, filtering, and vacuum drying to obtain amino-treated bamboo fiber; S2: adding aminated bamboo fiber, N-carboxymethylamino-2-ethanol and triethylamine to N,N-dimethylformamide, heating to 80-100°C, stirring for 1-2h, cooling, removing the solvent by vacuum distillation, recrystallizing, and vacuum drying to obtain an intermediate product; S3: Add the intermediate, 4-hydroxyphenethyl bromide and potassium carbonate to dichloromethane, stir ultrasonically for 20-25 minutes, then reflux at 100-120°C for 5-6 hours, remove dichloromethane by vacuum distillation, and then recrystallize with a mixed solution of acetone and ethanol, repeat 2-3 times, and obtain modified bamboo fiber after vacuum drying.
4. The method for preparing a composite material based on recycled ABS plastic according to claim 3, characterized in that: The amination bamboo fiber comprises the following components: by weight, 20-25 parts of bamboo fiber, 10-12 parts of 3-aminopropyltriethoxysilane, and 100-150 parts of ethanol aqueous solution.
5. The method for preparing a composite material based on recycled ABS plastic according to claim 3, characterized in that: The intermediate product comprises the following components: by weight, 10-12 parts of aminoated bamboo fiber, 25-28 parts of N-carboxylmethylamino-2-ethanol, 0.1-0.2 parts of triethylamine, and 200-250 parts of N,N-dimethylformamide.
6. The method for preparing a composite material based on recycled ABS plastic according to claim 3, characterized in that: The modified bamboo fiber comprises the following components: by weight, 12-15 parts of an intermediate, 6-8 parts of 4-hydroxyphenethyl bromide, 0.2-0.3 parts of potassium carbonate, and 100-120 parts of dichloromethane.
7. The method for preparing a composite material based on recycled ABS plastic according to claim 2, characterized in that: The preparation process of the modified acrylonitrile-butadiene-styrene plastic is as follows: regenerated acrylonitrile-butadiene-styrene plastic, glycidyl methacrylate, styrene and dicumyl peroxide are uniformly mixed, then melt-grafted at 170-210° C. and 90 r / min using a twin-screw extruder, granulated, and dried to obtain the modified acrylonitrile-butadiene-styrene plastic.
8. The method for preparing a composite material based on recycled ABS plastic according to claim 7, characterized in that: The modified acrylonitrile-butadiene-styrene plastic comprises the following components: by weight, 100-110 parts of recycled acrylonitrile-butadiene-styrene plastic, 5-8 parts of glycidyl methacrylate, 5-8 parts of styrene, and 0.3-0.5 parts of diisopropylbenzene peroxide.
9. The method for preparing a composite material based on recycled ABS plastic according to claim 2, characterized in that: The antioxidant includes one or more of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and tris[2,4-di-tert-butylphenyl]phosphite; The dispersant includes one or more of stearic acid monoglyceride, tristearic acid glyceride, and ethylene bisstearamide; The lubricant includes one or more of silicone, silicone oil, and pentaerythritol stearate.
10. The method for preparing a composite material based on recycled ABS plastic according to claim 1, characterized in that: The temperature of the melt spinning is 200-250°C, the temperature of the heat stretching is 90-120°C, and the temperature of the shaping is 190-200°C.