Anti-impact filter box material based on recycled ABS (Acrylonitrile Butadiene Styrene) and preparation method thereof

Abstract

The invention discloses an anti-impact filter box material based on recycled ABS (Acrylonitrile Butadiene Styrene) and a preparation method of the anti-impact filter box material, and belongs to the technical field of recycled ABS materials. The preparation method of the impact-resistant poison filtering box material based on the recycled ABS comprises the following steps: step 1, sorting, cleaning, drying, crushing and separating recycled waste safety helmets and other waste protective articles containing ABS parts, then performing density separation to obtain pure ABS fragments, crushing, washing, performing centrifugal dewatering, and performing electrostatic separation to obtain a recycled ABS base material; and 2, mixing the recycled ABS base material, the composite corrosion-resistant agent and the modified impact-resistant agent, then adding an antioxidant and a lubricant, uniformly mixing, melting, filtering, extruding, drying, carrying out injection molding, shaping and passivating to obtain the impact-resistant poison filter box material based on recycled ABS. The material prepared by the method has excellent corrosion resistance, impact resistance and thermal stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of recycling ABS materials, and particularly relates to an impact-resistant filter box material based on recycled ABS and a preparation method thereof. BACKGROUND

[0002] In the field of protective equipment, the filter box as the core component of the gas mask directly determines the reliability and service life of the protective equipment. Traditional filter boxes are mostly made of engineering plastics or metal substrates, but such materials face the dual challenges of insufficient corrosion resistance and weakened impact resistance under complex working conditions. Taking ABS (acrylonitrile-butadiene-styrene) substrate as an example, although the original ABS material has certain acid and alkali resistance due to the acrylonitrile component, and the butadiene rubber phase gives it toughening properties, the comprehensive performance is excellent, but the recycled ABS material is degraded due to thermal oxidation, decomposition of bromine-based flame retardants, and precipitation of small molecules, resulting in molecular chain degradation and impurity mixing, and the material surface is prone to form micro-cracks and pores, and the chemical corrosion resistance is significantly reduced. When exposed to corrosive environments such as chlorine-containing disinfectants, organic solvents or industrial waste gas, corrosive media such as chloride ions and hydroxide ions will penetrate through the cracks to the inside of the material, causing stress corrosion cracking; at the same time, the crosslinking degree of the butadiene rubber phase in the recycled ABS decreases due to thermal shear, the material toughness decreases, and the impurities such as metal debris and coating residues mixed in will form stress concentration points, which will cause brittle fracture under impact load, and if the filter box shell in the industrial protection scene uses unmodified recycled ABS, its impact resistance will be greatly weakened when it encounters accidental falling or mechanical impact, and it cannot meet the requirements of relevant standards, increasing the risk of protection failure.

[0003] Patent CN118085494B discloses a kind of anti-stretch impact-resistant ABS resin composite and its preparation method, including the following weight parts of raw material are made: 80-85 mass ABS resin, 15-40 mass toughening reinforcing ABS masterbatch composite, 2-4 mass compatible agent, 0.5-1.0 mass composite antioxidant, 0.2-0.5 mass lubricant;Toughening reinforcing ABS masterbatch composite at least includes first toughening reinforcing ABS masterbatch, second toughening reinforcing ABS masterbatch;First toughening reinforcing ABS masterbatch includes surface modified aramid fiber composition and ABS resin composition;Second toughening reinforcing ABS masterbatch includes surface modified functional filler and ABS resin composition.It is not only that ABS resin composite obtained has excellent mechanical strength and good impact resistance, but also that it has improved mechanical strength and impact resistance through toughening reinforcing ABS masterbatch composite, compatible agent and other formula design, but its impact resistance and corrosion resistance still have room for improvement.On the one hand, although surface modified aramid fiber and functional filler are used for toughening, the dispersion uniformity and interfacial bonding strength of fiber and filler in ABS matrix may be limited, and local stress concentration may still occur under extreme impact conditions;On the other hand, although composite antioxidant can delay thermal oxidation, it lacks long-term resistance to corrosive media such as chloride ions and organic solvents, especially in high temperature and high humidity environments, and is prone to penetration of corrosion-resistant media.If it is applied to filter box materials, in complex industrial or medical scenarios, the shell may be broken when dropped due to insufficient impact resistance, or the sealing structure may fail due to poor corrosion resistance, thereby threatening safety in use. SUMMARY

[0004] The present application aims to provide a recycled ABS-based impact-resistant filter box material and its preparation method, to solve the technical problems of poor impact resistance and corrosion resistance of recycled ABS materials in the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: The present application provides a preparation method of a recycled ABS-based impact-resistant filter box material, comprising the following steps: Step one: sort, wash, dry, crush and separate the recycled waste safety helmets and other waste protective articles containing ABS parts, then perform density sorting to obtain pure ABS fragments, crush, wash, centrifugal dewatering, electrostatic sorting, and obtain recycled ABS base material; Step two: mix recycled ABS base material, composite corrosion-resistant agent and modified impact-resistant agent, then add antioxidant and lubricant, mix uniformly, melt, filter, extrude, dry, injection mold, shape, passivate, and obtain recycled ABS-based impact-resistant filter box material.

[0006] As preferred, the preparation method of the composite corrosion-resistant agent comprises the following steps: Q1: add norbornene diacid anhydride and chitosan into a container containing acetic acid, stir uniformly, reflux reaction, after the reaction is completed, extract, wash, reduce pressure distillation, filter, concentrate, purify, and obtain organic matter 1; Q2: sequentially add organic matter 1, potassium carbonate and dimethyl sulfoxide into a container, stir at room temperature under argon environment, then add 1,2-dibromotetrafluoroethane, seal, heat and stir to react, extract, wash, remove the solvent under reduced pressure, drop the residue into a mixture of zinc and acetonitrile under reflux condition, heat and stir, after the reaction is completed, filter, concentrate under reduced pressure, purify, and obtain organic matter 2; Q3: under argon environment, add organic matter 2 into a container containing dichloromethane, then add Grubbs Ⅱ reagent into dichloromethane, after stirring and dissolving, drop into the container, after reaction at room temperature, drop ethyl vinyl ether, stir to react, sediment, suction filter, and dry to obtain the composite corrosion-resistant agent.

[0007] In the above process, the synthesis reaction formula of the composite corrosion-resistant agent is as follows:

[0008] As preferred, in Q1, the amount ratio of norbornene diacid anhydride, chitosan and acetic acid is (1.64-2.05) g:(1.61-1.98) g:(120-150) mL, and the reflux reaction time is 8-10 h.

[0009] As preferred, in Q2, the amount ratio of organic matter 1, potassium carbonate, dimethyl sulfoxide, 1,2-dibromotetrafluoroethane, zinc and acetonitrile is (1-1.6) g:(0.541-0.823) g:(13-20) mL:(1.21-1.87) g:(0.255-0.323) g:(10-18) mL, the stirring time at room temperature is 30-45 min, the heating and stirring reaction temperature is 98-102℃, the reaction time is 20-28 h, and the heating and stirring temperature is 88-92℃.

[0010] As preferred, in Q3, the amount ratio of organic matter 2, Grubbs Ⅱ reagent and ethyl vinyl ether is (1.5-2.1) g:(0.038-0.045) g:(0.15-0.22) mL, the reaction time at room temperature is 4-6 h, and the stirring reaction time is 30-45 min.

[0011] As preferred, the preparation method of the modified impact-resistant agent comprises the following steps: S1: add perfluoropolyether carboxylic acid into a container, then add methyl nonafluorobutyl ether and oxalyl chloride, mix uniformly, heat and stir under argon atmosphere, stir and reflux reaction, after the reaction is completed, heat and rotary evaporation to obtain intermediate a; S2: add intermediate a and 4,4'-diaminodiphenyl disulfide into a container in turn, then add triethylamine, stir and react, after the reaction is completed, rotary evaporation, washing, vacuum drying to obtain a modified impact modifier.

[0012] In the above process, the synthesis reaction formula of the modified impact modifier is as follows:

[0013] As preferred, in S1, the amount ratio of perfluoropolyether carboxylic acid, methyl nonafluorobutyl ether and oxalyl chloride is (6.8-10.2) g: (20.2-25.6) g: (5-7.5) mL, the heating and stirring temperature is 50-60℃, the reflux reaction time is 10-12h, and the heating rotary evaporation temperature is 60-65℃.

[0014] As preferred, in S2, the amount ratio of intermediate a, 4,4'-diaminodiphenyl disulfide and triethylamine is (9.25-11.31) g: (2.23-2.58) g: (0.2-0.27) g, the stirring reaction time is 6-8h, the rotary evaporation temperature is 88-92℃, and the vacuum drying time is 10-12h.

[0015] As preferred, in step one, the density separation process uses 5.17-10.71g / mL of sodium chloride aqueous solution, and is broken to 10-40mm; in step two, the amount ratio of recovered ABS base material, composite corrosion inhibitor, modified impact modifier, antioxidant and lubricant is (85-90) g: (5-8) g: (1-4) g: (0.2-0.5) g: (0.3-0.5) g.

[0016] The impact filter canister material based on recycled ABS is prepared by the preparation method.

[0017] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present application are: 1. The composite corrosion inhibitor and the modified impact modifier prepared are added to the preparation process of the impact filter canister material based on recycled ABS, which can effectively improve the corrosion resistance, impact resistance and thermal stability of the material.

[0018] 2.The application adds a composite corrosion-resistant agent to the preparation process of the filter material, which can effectively improve the corrosion resistance, impact resistance and thermal stability of the filter material, the fluorine contained in the composite corrosion-resistant agent can form a hydrophobic structure on the surface of the material through self-assembly effect, reducing the contact between the corrosion medium and the substrate; the cross-linked network formed by the composite corrosion-resistant agent can inhibit the expansion of micro-cracks through the "crack pinning" effect, the flexible chain segment of chitosan can absorb impact energy, improving the impact resistance of the material, in addition, the high electronegativity of fluorine atom can induce the redistribution of electron cloud density of adjacent carbon-carbon bonds, forming an electronic shielding layer, which can significantly reduce the generation of free radicals in the thermal oxidation process, improving the thermal stability of the material.

[0019] 3.The application adds a modified impact-resistant agent to the preparation process of the filter material, which can effectively improve the impact resistance, corrosion resistance and thermal stability of the filter material, the disulfide bond contained in the modified impact-resistant agent can form a "sacrificial bond" mechanism through dynamic rupture-recombination to absorb impact energy, at the same time, the rubbery flexible chain segment of perfluoropolyether forms a micro-region dispersed structure in the material, which consumes energy through molecular chain slipping and conformation adjustment, improving the impact resistance of the material, the perfluoropolyether chain segment contained in the modified impact-resistant agent self-assembles to form a hydrophobic barrier layer, which blocks the penetration of corrosion medium, the high bond energy of carbon-fluorine bond can also resist the erosion of oxidative medium, improving its corrosion resistance, the presence of fluorine atom and polyamide structure can also improve the thermal stability of the material. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be described below clearly and completely. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the application.

[0021] Embodiment 1: The embodiment discloses a preparation method of a composite corrosion-resistant agent, comprising the following steps: Q1: 1.85g of norbornene diacid anhydride and 1.74g of chitosan are added to a container containing 135mL of acetic acid, stirred uniformly, refluxed and reacted for 8h, after the reaction is completed, extracted, washed, reduced pressure distilled, filtered, concentrated, purified, and an organic matter 1 is obtained; Q2: 1.3g of the organic matter 1, 0.682g of potassium carbonate and 16.5mL of dimethyl sulfoxide are sequentially added to a container, stirred at room temperature for 45min under argon environment, then 1.54g of 1,2-dibromotetrafluoroethane is added, sealed, heated and stirred at 100℃ for 24h, extracted, washed, and the solvent is removed under reduced pressure, the residue is added dropwise to a mixture of 0.284g of zinc and 14mL of acetonitrile under reflux condition, heated and stirred at 90℃, after the reaction is completed, filtered, concentrated under reduced pressure, and purified to obtain an organic matter 2; Q3: Under argon atmosphere, 1.8 g of organic matter 2 was added to a container containing 3 mL of dichloromethane, then 0.041 g of Grubbs II reagent was added to 1 mL of dichloromethane, after stirring and dissolving, it was added dropwise to the container, after 4 h of reaction at room temperature, 0.18 mL of ethyl vinyl ether was added dropwise, and stirred for 30 min, then settled, suction filtered, and dried to obtain a composite corrosion inhibitor.

[0022] This embodiment discloses a preparation method of a modified impact modifier, comprising the following steps: S1: 8.5 g of perfluoropolyether carboxylic acid was added to a container, then 22.4 g of methyl nonafluorobutyl ether and 6.25 mL of oxalyl chloride were added, and after mixing evenly, it was heated and stirred under argon atmosphere at 55°C, and stirred and refluxed for 12 h, after the reaction was completed, it was heated and rotary evaporated at 65°C to obtain intermediate a; S2: 10.73 g of intermediate a and 2.45 g of 4,4'-diaminodiphenyl disulfide were sequentially added to a container, then 0.23 g of triethylamine was added, and stirred and reacted for 6 h, after the reaction was completed, it was rotary evaporated at 90°C, washed, and vacuum dried for 12 h to obtain a modified impact modifier.

[0023] This embodiment discloses a preparation method of a recycled ABS-based impact filter canister material, comprising the following steps: Step one: the recycled waste safety helmet and other waste protective articles containing ABS parts were sorted, washed, dried, crushed and separated, and then density sorting (using 8.82 g / mL of sodium chloride aqueous solution) was performed to obtain pure ABS fragments, which were crushed to 25 mm, washed, centrifuged and dewatered, and electrostatically sorted to obtain a recycled ABS base material; Step two: 88.5 g of the recycled ABS base material, 6.5 g of the composite corrosion inhibitor and 2.5 g of the modified impact modifier were mixed at 800 rpm, then 0.35 g of an antioxidant and 0.4 g of a lubricant were added, and after mixing evenly at 900 rpm, it was melted at 200°C, filtered through a 120-mesh filter screen, extruded, dried, injection molded, shaped, passivated to obtain a recycled ABS-based impact filter canister material.

[0024] Embodiment 2: This embodiment discloses a preparation method of a composite corrosion inhibitor, comprising the following steps: Q1: 1.64 g of norbornene dianhydride and 1.61 g of chitosan were added to a container containing 120 mL of acetic acid, stirred evenly, and refluxed for 8 h, after the reaction was completed, it was extracted, washed, distilled under reduced pressure, filtered, concentrated, and purified to obtain organic matter 1; Q2: 1.6 g of organic matter 1, 0.541 g of potassium carbonate and 13 mL of dimethyl sulfoxide were sequentially added to a container, stirred at room temperature for 45 min under argon atmosphere, then 1.21 g of 1,2-dibromotetrafluoroethane was added, and the reaction was stirred at 100°C for 24 h after sealing. After extraction, washing, and removal of the solvent under reduced pressure, the residue was added dropwise to a mixture of 0.255 g of zinc and 10 mL of acetonitrile under reflux conditions, and the reaction was stirred at 90°C. After the reaction was completed, filtration, concentration under reduced pressure, and purification were performed to obtain organic matter 2. Q3: 1.5 g of organic matter 2 was added to a container containing 3 mL of dichloromethane under argon atmosphere, then 0.038 g of Grubbs II reagent was added to 1 mL of dichloromethane, and after stirring and dissolving, it was added dropwise to the container. After reacting at room temperature for 4 h, 0.15 mL of ethyl vinyl ether was added, and the reaction was stirred for 30 min. After settling, suction filtration, and drying, a composite corrosion-resistant agent was obtained.

[0025] This embodiment discloses a preparation method of a modified impact-resistant agent, comprising the following steps: S1: 6.8 g of perfluoropolyether carboxylic acid was added to a container, then 20.2 g of methyl nonafluorobutyl ether and 5 mL of oxalyl chloride were added, and after mixing, the mixture was heated and stirred at 55°C under argon atmosphere. The reaction was stirred under reflux for 12 h, and after the reaction was completed, rotary evaporation was performed at 65°C to obtain intermediate a. S2: 9.25 g of intermediate a and 2.23 g of 4,4'-diaminodiphenyl disulfide were sequentially added to a container, then 0.27 g of triethylamine was added, and the reaction was stirred for 6 h. After the reaction was completed, rotary evaporation was performed at 90°C, washing was performed, and vacuum drying was performed for 12 h to obtain a modified impact-resistant agent.

[0026] This embodiment discloses a preparation method of a recycled ABS-based impact-resistant filter canister material, comprising the following steps: Step one: The recycled waste safety helmet and other waste protective articles containing ABS components were sorted, washed, dried, crushed, and separated, and then density sorting was performed (using 8.82 g / mL of sodium chloride aqueous solution) to obtain pure ABS fragments, which were crushed to 25 mm, washed, centrifuged, and dehydrated, and then electrostatic sorting was performed to obtain a recycled ABS base material; Step two: 85 g of the recycled ABS base material, 5 g of the composite corrosion-resistant agent, and 1 g of the modified impact-resistant agent were mixed at 800 rpm, then 0.2 g of an antioxidant and 0.5 g of a lubricant were added, and after mixing uniformly at 900 rpm, melting was performed at 200°C, filtration was performed through a 120-mesh filter screen, extrusion was performed, drying was performed, injection molding was performed, shaping was performed, and passivation was performed to obtain a recycled ABS-based impact-resistant filter canister material.

[0027] Embodiment 3: This embodiment discloses a preparation method of a composite corrosion-resistant agent, comprising the following steps: Q1: 2.05 g of norbornene diacid anhydride and 1.98 g of chitosan were added to a container containing 150 mL of acetic acid, stirred uniformly, and refluxed for 8 h. After the reaction was completed, extraction, washing, reduced pressure distillation, filtration, concentration, purification, and organic matter 1 were obtained; Q2: 1 g of organic matter 1, 0.823 g of potassium carbonate, and 20 mL of dimethyl sulfoxide were sequentially added to a container, stirred for 45 min at room temperature under an argon atmosphere, followed by the addition of 1.87 g of 1,2-dibromotetrafluoroethane. The mixture was heated and stirred at 100°C for 24 h. After extraction, washing, and removal of the solvent under reduced pressure, the residue was added dropwise to a mixture of 0.323 g of zinc and 18 mL of acetonitrile under reflux conditions. After heating and stirring at 90°C, the reaction was completed. After filtration, concentration under reduced pressure, and purification, organic matter 2 was obtained; Q3: 2.1 g of organic matter 2 was added to a container containing 3 mL of dichloromethane under an argon atmosphere. Then, 0.045 g of Grubbs II reagent was added to 1 mL of dichloromethane, dissolved by stirring, and then added dropwise to the container. After reaction at room temperature for 4 h, 0.22 mL of ethyl vinyl ether was added, stirred for 30 min, settled, suction filtered, and dried to obtain a composite corrosion inhibitor.

[0028] The present embodiment discloses a preparation method of a modified impact modifier, comprising the following steps: S1: 10.2 g of perfluoropolyether carboxylic acid was added to a container, followed by the addition of 25.6 g of methyl nonafluorobutyl ether and 7.5 mL of oxalyl chloride. After mixing uniformly, heating and stirring were performed under an argon atmosphere at 55°C, and refluxing was performed for 12 h. After the reaction was completed, rotary evaporation was performed at 65°C to obtain intermediate a; S2: 11.31 g of intermediate a and 2.58 g of 4,4'-diaminodiphenyl disulfide were sequentially added to a container, followed by the addition of 0.2 g of triethylamine. After stirring for 6 h, rotary evaporation was performed at 90°C, washing was performed, and vacuum drying was performed for 12 h to obtain a modified impact modifier.

[0029] The present embodiment discloses a preparation method of an impact-resistant filter canister material based on recycled ABS, comprising the following steps: Step one: recycled waste safety helmets and other waste protective articles containing ABS components were sorted, washed, dried, crushed, and separated, and then subjected to density sorting (using 8.82 g / mL of sodium chloride aqueous solution) to obtain pure ABS fragments, which were crushed to 25 mm, washed, centrifuged, and subjected to electrostatic sorting to obtain a recycled ABS base material; Step two: 90g recycled ABS base material, 8g composite corrosion resistant agent and 4g modified impact modifier were mixed at 800rpm, then 0.5g antioxidant and 0.3g lubricant were added, mixed uniformly at 900rpm, melted at 200℃, filtered through a 120 mesh filter, extruded, dried, injection molded, shaped, passivated, to obtain a recycled ABS-based impact filter canister material.

[0030] Example 4: This example discloses a method for preparing a composite corrosion resistant agent, comprising the following steps: Q1: 1.71g of norbornene diacid anhydride and 1.68g of chitosan were added to a container containing 130mL of acetic acid, stirred uniformly, refluxed for 8h, after the reaction was completed, extracted, washed, distilled under reduced pressure, filtered, concentrated, purified to obtain organic matter 1; Q2: 1.2g of organic matter 1, 0.571g of potassium carbonate and 15mL of dimethyl sulfoxide were sequentially added to a container, stirred at room temperature for 45min under argon atmosphere, then 1.38g of 1,2-dibromotetrafluoroethane was added, sealed and heated at 100℃ for 24h, extracted, washed, and the solvent was removed under reduced pressure, the residue was added dropwise to a mixture of 0.271g of zinc and 12mL of acetonitrile under reflux conditions, heated and stirred at 90℃, after the reaction was completed, filtered, concentrated under reduced pressure, and purified to obtain organic matter 2; Q3: 1.6g of organic matter 2 was added to a container containing 3mL of dichloromethane under argon atmosphere, then 0.039g of Grubbs II reagent was added to 1mL of dichloromethane, dissolved by stirring, then added dropwise to the container, reacted at room temperature for 4h, then 0.17mL of ethyl vinyl ether was added, stirred for 30min, settled, suction filtered, and oven dried to obtain a composite corrosion resistant agent.

[0031] This example discloses a method for preparing a modified impact modifier, comprising the following steps: S1: 7.4g of perfluoropolyether carboxylic acid was added to a container, then 21.7g of methyl nonafluorobutyl ether and 5.8mL of oxalyl chloride were added, mixed uniformly, heated and stirred at 55℃ under argon atmosphere, stirred and refluxed for 12h, after the reaction was completed, rotary evaporation was performed at 65℃ to obtain intermediate a; S2: 9.97g of intermediate a and 2.36g of 4,4'-diaminodiphenyl disulfide were sequentially added to a container, then 0.21g of triethylamine was added, stirred for 6h, after the reaction was completed, rotary evaporation was performed at 90℃, washed, and vacuum dried for 12h to obtain a modified impact modifier.

[0032] This example discloses a method for preparing a recycled ABS-based impact filter canister material, comprising the following steps: Step one: sort, clean, dry, crush and separate the recycled waste hard hat and other waste protective equipment containing ABS parts, then perform density separation (using 8.82 g / mL sodium chloride aqueous solution) to obtain pure ABS fragments, crush to 25 mm, wash, centrifugal dewatering, electrostatic separation, and obtain recycled ABS base material; Step two: mix 86 g of recycled ABS base material, 7 g of composite corrosion resistant agent and 2 g of modified impact resistant agent at 800 rpm, then add 0.22 g of antioxidant and 0.35 g of lubricant, mix uniformly at 900 rpm, melt at 200℃, filter through a 120 mesh screen, extrude, dry, injection mold, shape, and passivate to obtain an impact resistant filter canister material based on recycled ABS.

[0033] Example 5: This example discloses a method for preparing a composite corrosion resistant agent, comprising the following steps: Q1: Add 1.93 g of norbornene diacid anhydride and 1.83 g of chitosan to a container containing 140 mL of acetic acid, stir until uniform, reflux for 8 h, after the reaction is completed, extract, wash, reduce pressure distillation, filter, concentrate, purify, and obtain organic matter 1; Q2: Add 1.5 g of organic matter 1, 0.717 g of potassium carbonate and 19 mL of dimethyl sulfoxide to a container in sequence, stir at room temperature for 45 min under argon atmosphere, then add 1.72 g of 1,2-dibromotetrafluoroethane, seal and heat stir at 100℃ for 24 h, extract, wash, remove the solvent under reduced pressure, and drop the residue into a mixture of 0.312 g of zinc and 16 mL of acetonitrile under reflux conditions, heat stir at 90℃, after the reaction is completed, filter, concentrate under reduced pressure, and purify to obtain organic matter 2; Q3: Under argon atmosphere, add 2.01 g of organic matter 2 to a container containing 3 mL of dichloromethane, then add 0.042 g of Grubbs Ⅱ reagent to 1 mL of dichloromethane, stir to dissolve, and drop into the container, react at room temperature for 4 h, then drop 0.21 mL of ethyl vinyl ether, stir for 30 min, settle, suction filter, and oven dry to obtain a composite corrosion resistant agent.

[0034] This example discloses a method for preparing a modified impact resistant agent, comprising the following steps: S1: Add 9.2 g of perfluoropolyether carboxylic acid to a container, then add 24.2 g of methyl nonafluorobutyl ether and 7.2 mL of oxalyl chloride, mix uniformly, heat stir at 55℃ under argon atmosphere, and stir to reflux for 12 h, after the reaction is completed, heat to spin at 65℃ to obtain intermediate a; S2: 11.02 g of intermediate a and 2.49 g of 4,4'-diaminodiphenyl disulfide were sequentially added to a container, followed by the addition of 0.25 g of triethylamine, and the reaction was stirred for 6 h. After the reaction was completed, rotary evaporation was performed at 90°C, and the product was washed and dried in a vacuum oven for 12 h to obtain a modified impact modifier.

[0035] The present embodiment discloses a method for preparing a recycled ABS-based impact-resistant filter canister material, comprising the following steps: Step one: sort, wash, dry, crush and separate the recycled waste safety helmet and other waste protective articles containing ABS components, and then perform density sorting (using an 8.82 g / mL sodium chloride aqueous solution) to obtain pure ABS fragments, crush to 25 mm, wash, centrifugal dewater, and electrostatic sorting to obtain a recycled ABS base material; Step two: mix 89 g of the recycled ABS base material, 6 g of a composite corrosion-resistant agent, and 3 g of a modified impact modifier at 800 rpm, then add 0.4 g of an antioxidant and 0.45 g of a lubricant, mix uniformly at 900 rpm, melt at 200°C, filter through a 120-mesh filter screen, extrude, dry, injection mold, shape, and passivate to obtain a recycled ABS-based impact-resistant filter canister material.

[0036] Comparative Example 1: Comparative Example 1 is compared with Example 1. In the process of preparing the recycled ABS-based impact-resistant filter canister material, no composite corrosion-resistant agent is added, and other conditions remain unchanged.

[0037] Comparative Example 2: Comparative Example 2 is compared with Example 1. In the process of preparing the recycled ABS-based impact-resistant filter canister material, no modified impact modifier is added, and other conditions remain unchanged.

[0038] The recycled ABS-based impact-resistant filter canister materials prepared in Examples 1-5 and Comparative Examples 1-2 were tested for performance. The corrosion resistance of the samples was tested according to GB / T 11547-2008, the thermal stability of the samples was tested according to GB / T 40006.5-2021, and the impact strength of the samples was tested according to GB / T 1843-2008. The test results are shown in Table 1.

[0039] Table 1

[0040]

[0041] The smaller the mass loss rate of the sample after being treated by different solutions, the more excellent the corrosion resistance; the higher the glass transition temperature, the more excellent the thermal stability of the sample; it can be seen from the test results in Table 1 that the filter box material with excellent corrosion resistance, impact resistance and thermal stability is prepared by using the method of Examples 1-5. It can be found from the comparison between Comparative Example 1 and Examples 1-5 that the addition of the composite corrosion resistant agent can effectively improve the corrosion resistance, impact resistance and thermal stability of the material; it can be found from the comparison between Comparative Example 2 and Examples 1-5 that the addition of the modified impact resistant agent can effectively improve the corrosion resistance, impact resistance and thermal stability of the material.

[0042] The above description is merely preferred embodiments of the present application. The protection scope of the present application is not limited to this, and any skilled person in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

[0043] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the skilled in the art can well understand and use the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A method for preparing an impact-resistant gas filter cartridge material based on recycled ABS, characterized in that: The following steps are involved: Step 1: sort, clean, dry, crush and separate the recycled waste helmets and other waste protective equipment containing ABS components, and then perform density sorting to obtain pure ABS fragments, which are then crushed, washed, centrifugally dehydrated, and electrostatically sorted to obtain recycled ABS substrates; Step 2: Mixing the recycled ABS substrate, the composite corrosion resistant agent and the modified impact resistant agent, then adding the antioxidant and the lubricant, mixing evenly, melting, filtering, extruding, drying, injection molding, shaping, and passivating to obtain an impact-resistant gas filter cartridge material based on recycled ABS; The preparation method of the composite corrosion resistant agent comprises the following steps: Q1: Add nadic anhydride and chitosan to a container containing acetic acid, stir evenly, and reflux for reaction. After the reaction is completed, extract, wash, distill under reduced pressure, filter, concentrate, and purify to obtain organic compound 1; Q2: Add organic compound 1, potassium carbonate, and dimethyl sulfoxide to a container in sequence, stir at room temperature under argon atmosphere, then add 1,2-dibromotetrafluoroethane, seal, heat, and stir to react, extract, wash, and remove the solvent under reduced pressure. Add the residue dropwise to a mixture of zinc and acetonitrile under reflux conditions, heat and stir. After the reaction is complete, filter, concentrate under reduced pressure, and purify to obtain organic compound 2. Q3: Under argon atmosphere, organic substance 2 is added to a container containing dichloromethane, and then Grubbs II reagent is added to the dichloromethane, stirred to dissolve, and then added dropwise to the container. After reaction at room temperature, ethyl vinyl ether is added dropwise, stirred to react, settled, filtered, and dried to obtain a composite corrosion-resistant agent. The preparation method of the modified impact resistant agent comprises the following steps: S1: Add perfluoropolyether carboxylic acid to a container, then add methyl nonafluorobutyl ether and oxalyl chloride, mix well, heat and stir under argon atmosphere, stir and reflux to react, and after the reaction is completed, heat and rotary evaporate to obtain intermediate a; S2: adding intermediate a and 4,4'-diaminodiphenyl disulfide to a container in sequence, followed by adding triethylamine, stirring for reaction, and after the reaction is completed, rotary evaporation, washing, and vacuum drying to obtain a modified impact resistant agent; Among them, the synthetic reaction formula of the composite corrosion resistant agent is: ； The synthetic reaction formula of the modified impact resistant agent is: 。 2. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In the Q1, the usage ratio of nadic anhydride, chitosan and acetic acid is (1.64-2.05) g: (1.61-1.98) g: (120-150) mL.

3. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In Q2, the usage ratio of organic matter 1, potassium carbonate, dimethyl sulfoxide, 1,2-dibromotetrafluoroethane, zinc and acetonitrile is (1-1.6) g: (0.541-0.823) g: (13-20) mL: (1.21-1.87) g: (0.255-0.323) g: (10-18) mL.

4. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In the Q3, the usage ratio of the organic substance 2, Grubbs II reagent and ethyl vinyl ether is (1.5-2.1) g: (0.038-0.045) g: (0.15-0.22) mL.

5. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In the S1, the usage ratio of perfluoropolyether carboxylic acid, methyl nonafluorobutyl ether and oxalyl chloride is (6.8-10.2) g: (20.2-25.6) g: (5-7.5) mL.

6. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In the S2, the molar ratio of the intermediate a to 4,4'-diaminodiphenyl disulfide is (1.8-2.2): (0.9-1.04).

7. The method for preparing the impact-resistant gas filter cartridge material based on recycled ABS according to claim 1, characterized in that: In the step 1, a 5.17-10.71 g / mL sodium chloride aqueous solution is used in the density sorting process to crush the particles to 10-40 mm. In the step 2, the amount ratio of the recovered ABS substrate, composite corrosion resistant agent, modified impact resistant agent, antioxidant, and lubricant is (85-90) g: (5-8) g: (1-4) g: (0.2-0.5) g: (0.3-0.5) g.

8. Impact-resistant gas filter cartridge material based on recycled ABS, characterized in that: The preparation method is described in any one of claims 1 to 7.

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