A polysulfone / polyphenylene sulfide blend reinforced pelletizing method and high-strength high-toughness composition

Abstract

This invention discloses a polysulfone / polyphenylene sulfide blend reinforced granulation method and a high-strength, high-toughness composition, comprising the following steps: Step 1, placing polyphenylene sulfide and polysulfone separately in a vacuum environment and drying them at 120℃~140℃ for 4h~8h; placing boron nitride in a vacuum environment and drying it at 100℃~120℃ for 8h~16h; drying the reinforcing filler in a vacuum environment for later use; This invention relates to the field of polysulfone / polyphenylene sulfide blend granulation technology. This polysulfone / polyphenylene sulfide blend reinforced granulation method and high-strength, high-toughness composition, through graft modification of polyphenylene sulfide and organic functionalization of montmorillonite and graphene, constructs effective binding sites between the filler and resin molecules, solving the problem of weak interfacial bonding and easy agglomeration of inorganic fillers and polymer matrix, resulting in uniform dispersion of the filler in the system, and the combination of boron nitride and organically modified montmorillonite provides rigid reinforcement.

Description

Technical Field

[0001] This invention relates to the field of polysulfone / polyphenylene sulfide blend granulation technology, specifically to a polysulfone / polyphenylene sulfide blend reinforced granulation method and a high-strength and high-toughness composition. Background Technology

[0002] Polysulfone and polyphenylene sulfide are both high-performance engineering plastics with excellent heat resistance, chemical stability, and mechanical properties. Blending them allows for complementary advantages and they are commonly used in packaging, electronics, and precision components. However, traditional polysulfone / polyphenylene sulfide blends suffer from weak interfacial bonding, insufficient mechanical properties, and poor toughness. Simply relying on resin blending is insufficient to meet the requirements for high strength and high toughness.

[0003] Existing modification processes for polysulfone / polyphenylene sulfide often employ a single filler for reinforcement, resulting in defects such as uneven filler dispersion and poor compatibility with the resin matrix. Some processes omit raw material pretreatment, which can easily lead to bubbles and delamination during melt processing due to the moisture content of the raw materials, further reducing the overall performance of the finished product. In addition, the direct addition of ordinary inorganic fillers and unmodified graphene to the system cannot effectively improve the material's strength and toughness simultaneously, making it difficult to meet the needs of high-end packaging and structural components.

[0004] To address these issues, this invention proposes a polysulfone / polyphenylene sulfide blending reinforcement granulation method and a high-strength, high-toughness composition. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a polysulfone / polyphenylene sulfide blending reinforcement granulation method and a high-strength, high-toughness composition, solving the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a polysulfone / polyphenylene sulfide blend-reinforced granulation method, comprising the following steps:

[0009] Step 1: Place polyphenylene sulfide and polysulfone in a vacuum environment and dry them at 120℃~140℃ for 4h~8h; place boron nitride in a vacuum environment and dry it at 100℃~120℃ for 8h~16h; dry the reinforcing filler in a vacuum environment for later use.

[0010] The reinforcing filler is boron nitride, or a compound system of boron nitride and organically modified montmorillonite, or can be completely replaced by organically modified montmorillonite; at the same time, at least one of hexadecyltrimethylammonium bromide functionalized graphene and 1,3-di-hexadecylbenzimidazole bromide functionalized graphene can be compounded into the system.

[0011] Step 2: Add the dried polyphenylene sulfide, polysulfone and antioxidant into a torque rheometer and melt-mix them at 280~310℃ and 30~80rpm for 1~5min.

[0012] Step 3: Add the dried reinforcing filler and optional functionalized graphene to the molten matrix, and continue blending for 5-20 minutes;

[0013] Step 4: Granulate the blend using a granulator to obtain polysulfone / polyphenylene sulfide blended reinforced particles.

[0014] Preferably, the method for preparing the polyphenylene sulfide as a grafted polyphenylene sulfide graft includes the following steps:

[0015] S1. Dry the polyphenylene sulfide powder in an oven at 70~90℃ for 8~16 hours;

[0016] S2. Place dichloromethane in a round-bottom flask and reflux for 4-8 hours, then redistill. Add 1-5g of calcium hydride to every 300-700ml of dichloromethane and collect the distillate for later use.

[0017] S3. Take 40-80g of dried polyphenylene sulfide powder and put it into 400-800ml of redistilled dichloromethane, and stir magnetically for 6-24h to pre-swell;

[0018] S4. Vacuum the reaction system and purge with nitrogen for protection. Add octanoyl chloride dropwise while stirring in an ice bath. Keep the reaction in an ice bath for 1-3 hours, then transfer it to a water bath at 30-50°C and continue the reaction for 2-6 hours. After the reaction is complete, slowly add the product to a 2-10% sodium hydroxide solution and stir and wash 2-4 times. Finally, wash with distilled water and ethanol 2-4 times each.

[0019] S5. Place the washed product in a Soxhlet extractor and extract with an ethanol-distilled water mixed solvent for 12-36 hours. Then dry it in a vacuum oven at 70-90°C for 24-72 hours to obtain grafted modified polyphenylene sulfide.

[0020] Preferably, the polysulfone is a bisphenol A type polysulfone.

[0021] Preferably, the method for preparing the organically modified montmorillonite includes the following steps:

[0022] M1. Dissolve 10-30g of sodium montmorillonite in 500-1000mL of ethanol and deionized water at 50-80℃ in a solution with a volume ratio of 2-5:1 and stir at 500-1000rpm for 4-10h to obtain a montmorillonite suspension.

[0023] M2. Weigh 1,3-di-hexadecylbenzimidazole bromide in a molar amount 1 to 3 times the cation exchange capacity of montmorillonite, and prepare a modifier solution in 80 mL to 200 mL of ethanol.

[0024] M3. Add the modifier solution slowly in batches to the montmorillonite suspension within 0.5 to 3 hours, and stir continuously at 50 to 80°C for 12 to 36 hours.

[0025] M4. Filter the mixed solution to obtain a filter cake. Wash the cake 1-2 times with an ethanol-water mixture, and then wash it 2-8 times with deionized water.

[0026] M5. The filter cake is vacuum dried at 70~90℃ for 48~96h, and then ground through a 150~300 mesh sieve to obtain organically modified montmorillonite.

[0027] Preferably, the preparation method of the hexadecyltrimethylammonium bromide functionalized graphene includes the following steps:

[0028] ① Dissolve 50-200 mg of graphene oxide in 200-500 mL of deionized water and sonicate in an ultrasonic generator for 15-60 min;

[0029] ② Add 100~400mg of cetyltrimethylammonium bromide, place in a constant temperature oil bath, and reflux at 50~80℃ for 0.5~3h;

[0030] ③ Use a mixed fiber microporous membrane for vacuum filtration, and wash repeatedly with deionized water until no bromide ions are detected in the filtrate;

[0031] ④ The obtained black powder was placed in a vacuum drying oven and dried at 50~80℃ for 8~24h to obtain hexadecyltrimethylammonium bromide functionalized graphene.

[0032] Preferably, the preparation method of the brominated 1,3-di-hexadecylbenzimidazole functionalized graphene includes the following steps:

[0033] (1) Place 50~200mg of graphene oxide in a 300~800mL three-necked flask, add 200~500mL of ethanol and deionized water in a volume ratio of 0.5~2:1, and place it in an ultrasonic generator for ultrasonication for 0.5~2h;

[0034] (2) Add 100~400mg of 1,3-di-hexadecylbenzimidazole bromide and reflux for 3~12h in a constant temperature oil bath at 50~80℃;

[0035] (3) While the filter is still hot, use a mixed fiber microporous membrane to filter under reduced pressure. First, rinse with ethanol 2 to 5 times, then wash repeatedly with deionized water until no bromide ions are detected in the filtrate.

[0036] (4) The obtained black powder was placed in a vacuum drying oven and dried at 50~80℃ for 8~24h to obtain 1,3-di-hexadecylbenzimidazole bromide functionalized graphene.

[0037] A high-strength and high-toughness polysulfone / polyphenylene sulfide blend composition is prepared by the above-mentioned granulation method, wherein the raw materials include polyphenylene sulfide, polysulfone, boron nitride and antioxidant.

[0038] Preferably, it also contains at least one modified filler selected from organically modified montmorillonite, hexadecyltrimethylammonium bromide functionalized graphene, or 1,3-di-hexadecylbenzimidazole bromide functionalized graphene.

[0039] (III) Beneficial Effects

[0040] This invention provides a polysulfone / polyphenylene sulfide blend-reinforced granulation method and a high-strength, high-toughness composition. Compared with the prior art, it has the following advantages:

[0041] (1) The polysulfone / polyphenylene sulfide blending reinforcement granulation method and the high strength and high toughness composition, by grafting and modifying polyphenylene sulfide, and simultaneously performing organic functionalization treatment on montmorillonite and graphene, effective binding sites are constructed between filler and resin molecules, solving the problem of weak interface bonding and easy agglomeration of inorganic filler and polymer matrix, so that the filler is evenly dispersed in the system, and the combination of boron nitride and organically modified montmorillonite plays a rigid reinforcement role, and functionalized graphene further transmits stress and absorbs impact energy, and the tensile strength, flexural strength and impact toughness of the material are simultaneously improved, and the puncture resistance and extrusion resistance are significantly enhanced.

[0042] (2) The polysulfone / polyphenylene sulfide blending reinforced granulation method and the high strength and high toughness composition, by setting differentiated vacuum drying parameters according to the physicochemical properties of different raw materials, completely remove the adsorbed moisture from the raw materials, and avoid processing defects such as bubbles and broken strips caused by moisture vaporization during the melt mixing stage; the standardized melt mixing and step feeding process ensures that each component is fully mixed and reacted, so that the granulated finished product has a uniform phase, a dense internal structure, a significantly improved heat distortion temperature, and greatly improved high temperature resistance and dimensional stability, and can be used in multiple scenarios. Attached Figure Description

[0043] Figure 1 Fourier transform infrared spectra of pure polyphenylene sulfide, octanoyl chloride, and octanoyl chloride-modified polyphenylene sulfide provided by this invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Preparation of graphene oxide (GNO): 700 mg of graphene microparticle powder was added to a 150 mL single-necked flask, 35 mL of concentrated sulfuric acid was added, and the mixture was magnetically stirred at room temperature for 7 h; after sonication in an ultrasonic generator for 5 h, the mixture was transferred back to the magnetic stirrer, 35 mL of concentrated nitric acid was added, and the mixture was stirred for 40 min; the mixture was transferred to a 150 °C constant temperature oil bath, magnetically stirred, and refluxed for 2 h; the reactants were taken out, diluted with 1000 mL of deionized water, and allowed to stand for 24 h; the mixture was filtered under reduced pressure using a mixed fiber microporous membrane, and repeatedly washed with deionized water until the pH of the filtrate was 7.5; after washing with tetrahydrofuran 4 times, the black powder was placed in a vacuum drying oven and dried at 75 °C for 16 h to obtain GNO.

[0046] Preparation of grafted modified polyphenylene sulfide (PPS graft): PPS powder was dried in an oven at 80℃ for 12 h; 3 g of calcium hydride was added to every 500 mL of dichloromethane, refluxed for 6 h, and then redistilled, and the distillate was collected; 60 g of dried PPS powder was taken, 600 mL of redistilled dichloromethane was added, and the mixture was magnetically stirred for 15 h to complete the pre-swelling; the system was evacuated and protected with nitrogen, and octanoyl chloride was added dropwise under an ice bath, and the reaction was carried out in an ice bath for 2 h, and then transferred to a 40℃ water bath for 4 h; the reaction solution was added to a 6% sodium hydroxide solution and stirred and washed 3 times, and then washed 3 times each with distilled water and ethanol; the mixture was extracted with an ethanol-distilled water mixed solvent for 24 h, and then vacuum dried at 80℃ for 48 h to obtain the PPS graft.

[0047] Preparation of organically modified montmorillonite: Take 20g Na-MMT, add 750mL of ethanol / deionized water (volume ratio 3:1), stir at 65℃ and 750rpm for 7h to obtain montmorillonite suspension; weigh 1,3-di-hexadecylbenzimidazole bromide with a molar amount twice that of montmorillonite CEC, dissolve in 140mL of ethanol to prepare a modifier solution; add the modifier solution to the suspension in batches over 2h, stir at 65℃ for 24h; filter, wash twice with ethanol-water mixture, wash five times with deionized water; M5: vacuum dry at 80℃ for 72h, grind through a 200-mesh sieve to obtain organically modified montmorillonite.

[0048] Preparation of hexadecyltrimethylammonium bromide functionalized graphene (CTAB functionalized graphene): 120 mg GNO was dissolved in 350 mL of deionized water and sonicated for 40 min; 250 mg CTAB was added and refluxed in an oil bath at 65 °C for 2 h; the mixture was filtered under reduced pressure through a mixed fiber microporous membrane and washed with deionized water until no bromide ions were found in the filtrate; the filtrate was dried under vacuum at 65 °C for 16 h to obtain CTAB functionalized graphene.

[0049] Preparation of 1,3-di-hexadecylbenzimidazole bromide-functionalized graphene (Bz functionalized graphene): 120 mg GNO was placed in a three-necked flask, and 350 mL of ethanol / deionized water (volume ratio 1:1) was added. The mixture was sonicated for 1 h. 250 mg of 1,3-di-hexadecylbenzimidazole bromide was added, and the mixture was refluxed in an oil bath at 65 °C for 8 h. The mixture was filtered while hot, washed three times with ethanol, and washed with deionized water until no bromide ions were found in the filtrate. The filtrate was dried under vacuum at 65 °C for 16 h to obtain the target functionalized graphene.

[0050] Polyphenylene sulfide and polysulfone: dried under vacuum at 130 ℃ for 6 h;

[0051] Boron nitride: dried under vacuum at 110 °C for 12 h;

[0052] Torque rheometer: temperature 295 ℃, rotation speed 55 rpm, matrix melting time 3 min;

[0053] Packing material blending time: 12 min;

[0054] Bisphenol A type polysulfone was selected for the polysulfone.

[0055] Example 1

[0056] Pure boron nitride was used as the reinforcing filler, and no functionalized graphene was added.

[0057] Step 1: Raw material drying: Dry ordinary polyphenylene sulfide and bisphenol A type polysulfone under vacuum at 130℃ for 6 hours; dry boron nitride under vacuum at 110℃ for 12 hours.

[0058] Step 2, matrix melting: The dried polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3 minutes.

[0059] Step 3: Filler blending: Add the dried boron nitride powder and continue blending for 12 minutes;

[0060] Step 4: Granulation: The blend is fed into a granulator for granulation to obtain polysulfone / polyphenylene sulfide blended reinforced particles.

[0061] Example 2

[0062] Boron nitride was partially replaced with organically modified montmorillonite, and no functionalized graphene was added.

[0063] Step 1: Raw material drying: Polyphenylene sulfide and bisphenol A type polysulfone are dried under vacuum at 130℃ for 6 hours; boron nitride and organically modified montmorillonite are dried under vacuum at 110℃ for 12 hours respectively.

[0064] Step 2, matrix melting: The dried polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3min.

[0065] Step 3: Filler blending: Add dried boron nitride and organic modified montmorillonite composite filler according to the ratio, and continue blending for 12 minutes;

[0066] Step 4: Granulation: The material is prepared into blended reinforced granules by a granulator.

[0067] Example 3

[0068] Boron nitride was completely replaced with organically modified montmorillonite, and no functionalized graphene was added.

[0069] Step 1: Raw material drying: Polyphenylene sulfide and bisphenol A type polysulfone are dried at 130℃ under vacuum for 6 hours; organic modified montmorillonite is dried at 110℃ under vacuum for 12 hours.

[0070] Step 2, matrix melting: The dried polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3min.

[0071] Step 3: Filler blending: Add the dried organic modified montmorillonite and continue blending for 12 minutes;

[0072] Step 4: Granulation: The material is prepared into blended reinforced granules by a granulator.

[0073] Example 4

[0074] Boron nitride was used as a reinforcing filler, and CTAB functionalized graphene was compounded.

[0075] Step 1: Raw material drying: Polyphenylene sulfide and bisphenol A type polysulfone are dried under vacuum at 130℃ for 6 hours; boron nitride and CTAB functionalized graphene are dried under vacuum at 110℃ for 12 hours respectively.

[0076] Step 2, matrix melting: The dried polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3min.

[0077] Step 3: Filler blending: Add boron nitride and CTAB functionalized graphene in sequence, and continue blending for 12 minutes;

[0078] Step 4: Granulation: The material is prepared into blended reinforced granules by a granulator.

[0079] Example 5

[0080] Boron nitride was used as a reinforcing filler, and 1,3-di-hexadecylbenzimidazole bromide functionalized graphene was compounded.

[0081] Step 1: Raw material drying: Polyphenylene sulfide and bisphenol A type polysulfone are dried under vacuum at 130℃ for 6 hours; boron nitride and 1,3-di-hexadecylbenzimidazole bromide functionalized graphene are dried under vacuum at 110℃ for 12 hours respectively.

[0082] Step 2, matrix melting: The dried polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3min.

[0083] Step 3: Filler blending: Add boron nitride and 1,3-di-hexadecylbenzimidazole bromide functionalized graphene in sequence, and continue blending for 12 min;

[0084] Step 4: Granulation: The material is prepared into blended reinforced granules by a granulator.

[0085] Example 6

[0086] The method uses grafted modified polyphenylene sulfide + bisphenol A type polysulfone, and the reinforcing filler is a compound of boron nitride and organic modified montmorillonite, and two functional graphenes are also compounded.

[0087] Step 1: Raw material drying: Graft-modified polyphenylene sulfide and bisphenol A type polysulfone are dried under vacuum at 130℃ for 6 hours; boron nitride, organically modified montmorillonite, and two types of functionalized graphene are dried under vacuum at 110℃ for 12 hours respectively.

[0088] Step 2, matrix melting: The dried grafted modified polyphenylene sulfide, bisphenol A polysulfone and antioxidant are put into a torque rheometer and melt-mixed at 295℃ and 55rpm for 3min.

[0089] Step 3: Filler blending: Add the compound reinforcing filler and two types of functionalized graphene, and continue blending for 12 minutes;

[0090] Step 4: Granulation: The material is prepared into high-strength and high-toughness blended granules by a granulator.

[0091] Comparative Example 1

[0092] It uses only polyphenylene sulfide, bisphenol A polysulfone and antioxidants, without adding any boron nitride, organically modified montmorillonite or functionalized graphene.

[0093] Polyphenylene sulfide and bisphenol A type polysulfone were dried under vacuum at 130℃ for 6 hours; together with antioxidants, they were added to a torque rheometer and melt-mixed at 295℃ and 55rpm for 3 minutes; the melted material was directly granulated to obtain pure resin blend particles.

[0094] Comparative Example 2

[0095] A single boron nitride filler was used without vacuum drying; the formulation was the same as in Example 1, with all raw materials omitting the vacuum drying process, and the remaining process parameters and operating steps were completely identical, resulting in blended particles.

[0096] Comparative Example 3

[0097] Unmodified sodium-based montmorillonite was used to completely replace boron nitride. The raw materials were subjected to standard vacuum drying, and the remaining processes were the same as in Example 3.

[0098] Comparative Example 4

[0099] The CTAB functionalized graphene was replaced with ordinary multilayer graphene microsheets, and the formulation and process were the same as in Example 4.

[0100] Tensile strength (MPa) Elongation at break (%) Bending strength (MPa) <![CDATA[Impact strength (kJ / m 2 )]]> Heat distortion temperature (°C) Example 1 86.2 6.8 128.5 9.6 205 Example 2 89.5 7.2 132.4 10.2 208 Example 3 92.1 6.5 135.8 10.5 210 Example 4 98.3 8.5 142.6 12.3 215 Example 5 101.2 8.9 145.3 12.8 217 Example 6 108.6 10.2 152.4 14.5 222 Comparative Example 1 68.5 4.2 98.6 6.8 185 Comparative Example 2 72.3 5.1 105.2 7.5 192 Comparative Example 3 75.6 4.8 108.4 7.9 195 Comparative Example 4 80.1 6.2 118.3 8.8 200

[0101] As shown in the table above, from Example 1 to Example 3, as the proportion of organically modified montmorillonite replacing boron nitride increases, the tensile strength increases from 86.2 MPa to 92.1 MPa, and the flexural strength increases from 128.5 MPa to 135.8 MPa, indicating that organically modified montmorillonite has a better reinforcing effect in polysulfone / polyphenylene sulfide matrix.

[0102] After compounding CTAB functionalized graphene (Example 4) or Bz functionalized graphene (Example 5) on the basis of boron nitride, the tensile strength was increased to 98.3 MPa and 101.2 MPa, respectively, and the elongation at break was increased to 8.5% and 8.9%, respectively, indicating that functionalized graphene can significantly improve the balance between strength and toughness of the material.

[0103] Example 6 uses grafted modified polyphenylene sulfide, a combination of two functionalized graphenes, and organically modified montmorillonite. The tensile strength reaches 108.6 MPa, the elongation at break reaches 10.2%, and the impact strength is increased to 14.5 kJ / m². 2 The heat distortion temperature reaches 222℃, and all performance characteristics are optimal.

[0104] Depend on Figure 1 It can be seen that the octanoyl chloride spectral line is at 1897 cm⁻¹. -1 The characteristic absorption peak of the C=O stretching vibration of the acyl chloride group appears at 1897 cm⁻¹; the spectrum of pure polyphenylene sulfide does not show a peak at 1897 cm⁻¹. -1 With 1677cm -1 Two carbonyl characteristic peaks, at 1000 cm⁻¹ -1 ~1600cm -1 The multiple sharp absorption peaks in the range are characteristic peaks of the skeletal vibrations of the benzene ring and CS bond in polyphenylene sulfide; the 1897 cm⁻¹ peak in the spectrum of octanoyl chloride-modified polyphenylene sulfide is also a characteristic peak. -1The characteristic peak of acyl chloride completely disappeared, and at 1677 cm⁻¹... -1 A novel absorption peak for the C=O stretching vibration of the amide carbonyl group appears at a new position, while the characteristic peaks of the polyphenylene sulfide skeleton are fully preserved at 3000 cm⁻¹. -1 The absorption intensity of the CH stretching vibration of the nearby alkyl group was significantly enhanced. These results indicate that the octanoyl chloride feedstock was completely consumed during the reaction, the main chain structure of polyphenylene sulfide (PPS) remained intact, and the octanoyl chloride underwent an acylation reaction with the active groups at the ends of the PPS molecular chain, resulting in the removal of hydrogen chloride and the formation of an amide bond structure. The long alkyl chain of the octanoyl chloride was successfully grafted onto the PPS molecular chain. This application yielded a grafted modified PPS product, and this grafted structure can effectively improve the interfacial compatibility between PPS and polysulfone and inorganic fillers.

[0105] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0107] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for granulation of polysulfone / polyphenylene sulfide blends, characterized in that, Includes the following steps: Step 1: Place polyphenylene sulfide and polysulfone in a vacuum environment and dry them at 120℃~140℃ for 4h~8h; place boron nitride in a vacuum environment and dry it at 100℃~120℃ for 8h~16h; dry the reinforcing filler in a vacuum environment for later use. The reinforcing filler is boron nitride, or a compound system of boron nitride and organically modified montmorillonite, or can be completely replaced by organically modified montmorillonite; at the same time, at least one of hexadecyltrimethylammonium bromide functionalized graphene and 1,3-di-hexadecylbenzimidazole bromide functionalized graphene can be compounded into the system. Step 2: Add the dried polyphenylene sulfide, polysulfone and antioxidant into a torque rheometer and melt-mix them for 1-5 minutes at 280-310℃ and 30-80 rpm. Step 3: Add the dried reinforcing filler and optional functionalized graphene to the molten matrix, and continue blending for 5-20 minutes; Step 4: Granulate the blend using a granulator to obtain polysulfone / polyphenylene sulfide blended reinforced particles.

2. The polysulfone / polyphenylene sulfide blend reinforced granulation method according to claim 1, characterized in that: The method for preparing the grafted polyphenylene sulfide includes the following steps: S1. Dry the polyphenylene sulfide powder in an oven at 70~90℃ for 8~16 hours; S2. Place dichloromethane in a round-bottom flask and reflux for 4-8 hours, then redistill. Add 1-5g of calcium hydride to every 300-700ml of dichloromethane and collect the distillate for later use. S3. Take 40-80g of dried polyphenylene sulfide powder and put it into 400-800ml of redistilled dichloromethane, and stir magnetically for 6-24h for pre-swelling; S4. Vacuum the reaction system and purge with nitrogen for protection. Add octanoyl chloride dropwise while stirring in an ice bath. Keep the reaction in an ice bath for 1-3 hours, then transfer it to a water bath at 30-50°C and continue the reaction for 2-6 hours. After the reaction is complete, slowly add the product to a 2-10% sodium hydroxide solution and stir and wash 2-4 times. Finally, wash with distilled water and ethanol 2-4 times each. S5. Place the washed product in a Soxhlet extractor and extract with an ethanol-distilled water mixed solvent for 12-36 hours. Then dry it in a vacuum oven at 70-90°C for 24-72 hours to obtain grafted modified polyphenylene sulfide.

3. The polysulfone / polyphenylene sulfide blend reinforced granulation method according to claim 1, characterized in that: The polysulfone is bisphenol A type polysulfone.

4. The polysulfone / polyphenylene sulfide blend reinforced granulation method according to claim 1, characterized in that: The preparation method of the organically modified montmorillonite includes the following steps: M1. Dissolve 10-30g of sodium montmorillonite in 500-1000mL of ethanol and deionized water at 50-80℃ in a solution with a volume ratio of 2-5:1 and stir at 500-1000rpm for 4-10h to obtain a montmorillonite suspension. M2. Weigh 1,3-di-hexadecylbenzimidazole bromide in a molar amount 1 to 3 times the cation exchange capacity of montmorillonite, and prepare a modifier solution in 80 mL to 200 mL of ethanol. M3. Add the modifier solution slowly in batches to the montmorillonite suspension within 0.5 to 3 hours, and stir continuously at 50 to 80°C for 12 to 36 hours. M4. Filter the mixed solution to obtain a filter cake. Wash the filter cake 1-2 times with an ethanol-water mixture, and then wash it 2-8 times with deionized water. M5. The filter cake is vacuum dried at 70~90℃ for 48~96h, and then ground through a 150~300 mesh sieve to obtain organically modified montmorillonite.

5. The polysulfone / polyphenylene sulfide blend reinforced granulation method according to claim 1, characterized in that: The preparation method of the hexadecyltrimethylammonium bromide functionalized graphene includes the following steps: ① Dissolve 50~200mg of graphene oxide in 200~500mL of deionized water and place it in an ultrasonic generator for ultrasonication for 15~60min; ② Add 100~400mg of cetyltrimethylammonium bromide, place in a constant temperature oil bath, and reflux at 50~80℃ for 0.5~3h; ③ Use a mixed fiber microporous membrane for vacuum filtration, and wash repeatedly with deionized water until no bromide ions are detected in the filtrate; ④ The obtained black powder was placed in a vacuum drying oven and dried at 50~80℃ for 8~24h to obtain hexadecyltrimethylammonium bromide functionalized graphene.

6. The polysulfone / polyphenylene sulfide blend reinforced granulation method according to claim 1, characterized in that, The preparation method of the brominated 1,3-di-hexadecylbenzimidazole functionalized graphene includes the following steps: (1) Place 50~200mg of graphene oxide in a 300~800mL three-necked flask, add 200~500mL of ethanol and deionized water in a volume ratio of 0.5~2:1, and place it in an ultrasonic generator for ultrasonication for 0.5~2h; (2) Add 100~400mg of 1,3-di-hexadecylbenzimidazole bromide and reflux for 3~12h in a constant temperature oil bath at 50~80℃; (3) While the filter is still hot, use a mixed fiber microporous membrane to filter under reduced pressure. First, rinse with ethanol 2 to 5 times, then wash repeatedly with deionized water until no bromide ions are detected in the filtrate. (4) The obtained black powder was placed in a vacuum drying oven and dried at 50~80℃ for 8~24h to obtain 1,3-di-hexadecylbenzimidazole bromide functionalized graphene.

7. A high-strength, high-toughness polysulfone / polyphenylene sulfide blend composition, characterized in that, It is prepared by the granulation method according to any one of claims 1 to 6, and the raw materials include polyphenylene sulfide, polysulfone, boron nitride and antioxidant.

8. The high-strength, high-toughness polysulfone / polyphenylene sulfide blend composition according to claim 7, characterized in that, It also contains at least one modified filler selected from organically modified montmorillonite, hexadecyltrimethylammonium bromide functionalized graphene, or 1,3-di-hexadecylbenzimidazole bromide functionalized graphene.

Images