PPS high-strength temperature-resistant composite material, preparation thereof and application of PPS high-strength temperature-resistant composite material in humanoid

Abstract

The invention discloses a PPS high-strength temperature-resistant composite material, preparation thereof and application of the PPS high-strength temperature-resistant composite material in a humanoid robot. The composite material comprises the following raw material components: 35-55 parts by mass of polyphenylene sulfide, 20-40 parts by mass of a composite reinforcing agent, 2-8 parts by mass of a flexibilizer, 3-9 parts by mass of a conductive agent, 3-7 parts by mass of potassium titanate whiskers, 0.2-0.5 part by mass of a coupling agent and 0.1-1 part by mass of an antioxidant, and the composite reinforcing agent comprises more than two reinforcing agents with different forms and / or sizes. The obtained PPS high-strength temperature-resistant composite material is subjected to multi-scale enhancement and multifunctional modification on the basis of a PPS material, the performance limitation of an existing PPS material can be broken through, and powerful material support is provided for high-performance and intelligent development of humanoid robots.

Description

Technical Field

[0001] The present invention belongs to the technical field of PPS composites, and particularly relates to PPS high-strength and high-temperature-resistant composites. Background Art

[0002] As a highly complex intelligent device, a humanoid robot needs to withstand high-frequency mechanical loads during dynamic movement, and at the same time, it also needs to cope with complex environmental factors such as high temperature, friction, and electromagnetic interference. This poses unprecedented challenges to the material properties of the key components of the robot, such as joints, load-bearing skeletons, and dynamic sensor housings.

[0003] Although traditional metal materials such as aluminum alloys and titanium alloys have excellent strength and stiffness and can meet the requirements of mechanical loads, they have problems of large weight and poor corrosion resistance. This not only limits the movement speed and flexibility of the robot but also significantly increases energy consumption. To overcome the defects of metal materials, engineering plastics are used as an alternative. However, although ordinary engineering plastics such as ABS and PC achieve lightweight, their heat resistance and mechanical strength are significantly insufficient and are difficult to meet the usage requirements of humanoid robots under extreme working conditions such as high temperature and high load.

[0004] Polyphenylene sulfide (PPS), as a high-performance engineering plastic, has attracted much attention for its excellent heat resistance (melting point 285 °C), excellent dimensional stability, and good chemical corrosion resistance. However, the unmodified PPS material is relatively brittle, and although it has high rigidity, its tensile strength and flexural modulus still cannot meet the requirements of high-load components; in addition, as an insulating material, PPS has a high volume resistivity and cannot meet the requirements of humanoid robots for electromagnetic shielding and antistatic functions, etc.

[0005] The prior art research on the modification of PPS mainly focuses on the improvement of single properties. For example, CN111393774A discloses a PPS composite modified with fluorocarbon resin. Although it improves the chemical resistance of the material to a certain extent, its upper temperature limit of heat resistance is only about 200 °C and it does not have good electrical conductivity. Another study improves the mechanical properties by adding glass fibers to PPS, but this method often leads to obvious anisotropy of the material and has limited improvement effect on toughness. More notably, there is currently no PPS-based composite material on the market that can simultaneously meet the requirements of high strength, high toughness, high temperature resistance, lightweight, and intelligent functions.

[0006] With the continuous expansion of the application scenarios of humanoid robots, their working environments are becoming increasingly complex. In industrial application scenarios, robots may need to work continuously in high-temperature environments above 150°C; in outdoor applications, they need to cope with temperature changes from -40°C to 80°C; while in the medical or precision manufacturing fields, strict requirements are put forward for the dimensional stability and electromagnetic interference resistance of materials. Such diverse requirements make the improvement of single performance no longer meet the needs of practical applications.

[0007] In summary, the development of a new composite material with high strength, heat resistance, lightweight and intelligent functions has become the key breakthrough point for promoting the development of humanoid robot technology. Summary of the Invention

[0008] Aiming at the defects of the existing technology, the purpose of the present invention is to provide a PPS high-strength and heat-resistant composite material and its preparation and application in humanoid robots. The PPS high-strength and heat-resistant composite material is subjected to multi-scale reinforcement and multi-functional modification on the basis of PPS materials, which can break through the performance limitations of existing PPS materials and provide strong material support for the high-performance and intelligent development of humanoid robots.

[0009] The technical solution of the present invention is as follows:

[0010] A PPS high-strength and heat-resistant composite material, which comprises the following raw material components: 35-55 parts by mass of polyphenylene sulfide, 20-40 parts by mass of a composite reinforcing agent, 2-8 parts by mass of a toughening agent, 3-9 parts by mass of a conductive agent, 3-7 parts by mass of potassium titanate whiskers, 0.2-0.5 parts by mass of a coupling agent, and 0.1-1 part by mass of an antioxidant, wherein the composite reinforcing agent comprises two or more kinds of reinforcing agents with different morphologies and / or sizes.

[0011] In the above technical solution of the present invention, the composite reinforcing agent exists in different morphologies and / or sizes in the matrix, and can produce specific reinforcing effects through their respective physical and chemical properties and synergistically improve the mechanical properties, thermal properties and electrical properties of the composite material.

[0012] According to some preferred embodiments of the present invention, the composite reinforcing agent comprises two or more of glass fiber, carbon fiber and other inorganic fillers.

[0013] More preferably, the carbon fiber is selected from short carbon fibers with a length of 1-3 mm.

[0014] In the above preferred embodiments, the short carbon fibers not only have very high mechanical strength, but also have good heat resistance and corrosion resistance. Moreover, they have very good fluidity in the resin, have good interfacial properties with the matrix resin, and can better improve the interfacial bonding strength after surface modification by plasma treatment.

[0015] More preferably, the glass fiber is selected from non-alkali continuous glass fiber.

[0016] In the above preferred embodiments, the non-alkali continuous glass fiber has very high tensile strength and tensile modulus, which can significantly improve the mechanical properties of the PPS composite material. In addition, the non-alkali continuous glass fiber can maintain good stability at high temperatures, and its addition can significantly improve the heat resistance of the PPS composite material.

[0017] According to some preferred embodiments of the present invention, the other inorganic fillers include one or more of nano-aluminum oxide, calcium carbonate, talcum powder, nano-montmorillonite, wollastonite, aluminum hydroxide, hollow glass microspheres, kaolin, barium sulfate, zinc oxide whiskers, mica powder, nano-silicon dioxide, magnesium oxide, molybdenum disulfide.

[0018] More preferably, the other inorganic filler is nano-aluminum oxide.

[0019] In this preferred embodiment, nano-aluminum oxide has extremely high hardness, which can significantly improve the surface hardness of the PPS composite material and keep good wear resistance in a high-friction environment; and the high-modulus characteristic of nano-aluminum oxide can enhance the rigidity of the PPS composite material and keep stable performance in a high-load environment; nano-aluminum oxide also has excellent thermal stability, which can improve the high-temperature resistance of the PPS composite material and keep good mechanical properties and dimensional stability in a high-temperature environment.

[0020] According to some preferred embodiments of the present invention, the toughening agent is selected from thermoplastic polyurethane and / or a terpolymer containing an epoxy group.

[0021] In the above preferred embodiments, thermoplastic polyurethane can form a sea-island structure with PPS, and this structure can disperse stress and improve the notch impact strength of the material; the terpolymer can generate reactive functional groups when heated, react with hydroxyl groups, carboxyl groups and amino groups in engineering thermoplastics to form chemical bonds, improve the compatibility of the material, and improve the toughness and impact resistance of the material.

[0022] According to some preferred embodiments of the present invention, the conductive agent is selected from carbon nanotubes and / or conductive carbon black.

[0023] In the above preferred embodiments, carbon nanotubes have good electrical conductivity, can form an electrical conduction path in the PPS matrix, reduce the resistivity of the material, improve the electrical conductivity of the material, and thus effectively enhance the electromagnetic shielding performance of the material; conductive carbon black also has very high electrical conductivity and can effectively dissipate static electricity to prevent static electricity accumulation and static discharge. Carbon nanotubes and conductive carbon black also have a synergistic effect to jointly improve the electrical conductivity, electromagnetic shielding performance and antistatic performance of the material.

[0024] According to some preferred embodiments of the present invention, the coupling agent is selected from silane coupling agents.

[0025] According to some preferred embodiments of the present invention, the potassium titanate whiskers are selected from fibrous potassium titanate whiskers.

[0026] Potassium titanate whiskers are divided into two types: flaky and fibrous. The inventors unexpectedly found that fibrous potassium titanate whiskers have a higher aspect ratio, better strength and modulus than flaky ones, and can significantly improve the tensile strength and flexural modulus of the composite material.

[0027] According to some preferred embodiments of the present invention, the antioxidant is selected from hindered phenol antioxidants and / or phosphite antioxidants.

[0028] According to some preferred embodiments of the present invention, the composite reinforcing agent is selected from chopped carbon fibers, E-glass continuous fibers and nano-aluminum oxide; the toughening agent is selected from thermoplastic polyurethane elastomers; the conductive agent is selected from carbon nanotubes and conductive carbon black; the coupling agent is selected from silane coupling agents.

[0029] More preferably, the mass ratio of chopped carbon fibers, E-glass continuous fibers to nano-aluminum oxide in the composite reinforcing agent is 3 - 2.5:1:2 - 1.3; the mass ratio of carbon nanotubes to conductive carbon black in the conductive agent is 0.3 - 0.5:1.

[0030] According to some preferred embodiments of the present invention, the number average molecular weight of the polyphenylene sulfide is 5×10 4 -1×10 5 .

[0031] The present invention further provides a method for preparing the PPS high-strength and high-temperature resistant composite material, wherein the composite reinforcing agent includes glass fibers, carbon fibers and other inorganic fillers, and the preparation method includes the following steps:

[0032] (1) High-speed mix other raw materials except glass fibers to obtain a mixed material;

[0033] (2) Add the mixed material into a co-rotating twin-screw extruder, and add glass fibers from the side feeding port of the extruder, and carry out melt extrusion granulation at 230 - 320 °C to obtain the PPS high-strength and high-temperature resistant composite material.

[0034] According to some preferred embodiments of the present invention, the screw length-diameter ratio of the used co-rotating twin-screw extruder is 35:1.

[0035] According to some preferred embodiments of the present invention, the co-rotating twin-screw extruder used sequentially includes ten temperature control zones. During the extrusion process, the temperatures of each zone are respectively controlled as follows: Zone 1: 230 °C, Zone 2: 280 °C, Zone 3: 310 °C, Zone 4: 290 °C, Zone 5: 260 °C, Zone 6: 240 °C, Zone 7: 290 °C, Zone 8: 300 °C, Zone 9: 300 °C, and Zone 10: 320 °C. The side feeding port is located on the side of Zone 5.

[0036] The present invention has the following beneficial effects:

[0037] The present invention provides a multi-phase reinforcement system through a composite reinforcement agent. Synergistic effects can be generated between different reinforcement agents, significantly enhancing the rigidity of the composite material. And it synergizes with potassium titanate whiskers with crack suppression effect to improve the strength and compressive capacity of the composite material;

[0038] Through the introduction of a toughening agent, especially thermoplastic polyurethane elastomer (TPU) that can form a pirate structure, the notched impact strength of the composite material is increased by more than 50%. At the same time, this toughening agent has good compatibility and interfacial effect with the composite reinforcement agent, which can improve the strength and toughness of the material simultaneously;

[0039] Through the addition of conductive agents such as carbon nanotubes and conductive carbon black, a conductive path is constructed in the composite material, endowing the material with both antistatic and electromagnetic shielding performance (shielding effectiveness ≥ 30 dB);

[0040] The PPS high-strength and heat-resistant composite material of the present invention has high strength, heat resistance, lightweight and intelligent functions, with excellent comprehensive performance, and is particularly suitable for use in humanoid robots.

[0041] The PPS high-strength and heat-resistant composite material of the present invention can be directly prepared by a twin-screw extrusion process, with high preparation efficiency, low requirements for equipment, and easy for large-scale production. Specific embodiments

[0042] The technical solutions in the present invention will be further described below in conjunction with the embodiments of the present invention. The embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0043] Example 1

[0044] The PPS high-strength and heat-resistant composite material is prepared through the following steps:

[0045] (1) Weigh 52 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (316 °C, 5 kg) and a number-average molecular weight of 50,000, 15 parts by mass of short carbon fiber, 5 parts by mass of nano-aluminum oxide, 7 parts by mass of TPU, 1.5 parts by mass of carbon nanotube, 4 parts by mass of conductive carbon black, 5 parts by mass of potassium titanate whisker, 0.5 parts by mass of KH-560 coupling agent, and 0.5 parts by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0046] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion granulation to obtain a PPS high-strength and heat-resistant composite material; the screw length-diameter ratio of the used co-rotating twin-screw extruder is 35:1; it includes ten temperature control zones, and the temperatures of each zone are respectively controlled as follows: zone 1 is 230 °C, zone 2 is 280 °C; zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, zone 10 is 320 °C; add alkali-free continuous glass fiber with the brand number ECT4300A-2000 at the feeding port on the side of zone 5, and ensure that the feeding amount of glass fiber reaches 10 parts by mass by controlling the main machine feeding amount and the main machine rotation speed.

[0047] Example 2

[0048] Prepare a PPS high-strength and heat-resistant composite material through the following steps:

[0049] (1) Weigh 44 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (316 °C, 5 kg) and a number-average molecular weight of 50,000, 20 parts by mass of short carbon fiber, 8 parts by mass of nano-aluminum oxide, 5 parts by mass of TPU, 3 parts by mass of carbon nanotube, 6 parts by mass of conductive carbon black, 3 parts by mass of potassium titanate whisker, 0.5 parts by mass of KH-560 coupling agent, and 1 part by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0050] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion granulation to obtain a PPS high-strength and heat-resistant composite material; the screw length-diameter ratio of the used co-rotating twin-screw extruder is 35:1; it includes ten temperature control zones, and the temperatures of each zone are respectively controlled as follows: zone 1 is 230 °C, zone 2 is 280 °C, zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, zone 10 is 320 °C; add alkali-free continuous glass fiber with the brand number ECT4300A-2000 at the feeding port on the side of zone 5, and ensure that the feeding amount of glass fiber reaches 10 parts by mass by controlling the main machine feeding amount and the main machine rotation speed.

[0051] Comparative Example 1

[0052] Prepare a PPS composite material through the following steps:

[0053] (1) Weigh 77 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (at 316 °C, 5 kg) and a number-average molecular weight of 50,000, 5 parts by mass of nano-aluminum oxide, 7 parts by mass of TPU, 1.5 parts by mass of carbon nanotubes, 4 parts by mass of conductive carbon black, 5 parts by mass of potassium titanate whiskers, 0.5 parts by mass of KH-560 coupling agent, and 0.5 parts by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0054] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion and pelletization to obtain a PPS composite material; the screw length-diameter ratio of the used co-rotating twin-screw extruder is 35:1; it includes ten temperature control zones, and the temperatures of each zone are respectively controlled as follows: zone 1 is 230 °C, zone 2 is 280 °C, zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, and zone 10 is 320 °C.

[0055] Comparative Example 2

[0056] Prepare the PPS composite material through the following steps:

[0057] (1) Weigh 62 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (at 316 °C, 5 kg) and a number-average molecular weight of 50,000, 15 parts by mass of chopped glass fibers, 10 parts by mass of alkali-free continuous glass fibers, 7 parts by mass of TPU, 1.5 parts by mass of carbon nanotubes, 4 parts by mass of conductive carbon black, 0.5 parts by mass of KH-560 coupling agent, and 0.5 parts by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0058] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion and pelletization to obtain a PPS composite material; the screw length-diameter ratio of the used co-rotating twin-screw extruder is 35:1; it includes ten temperature control zones, and the temperatures of each zone are respectively controlled as follows: zone 1 is 230 °C, zone 2 is 280 °C, zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, and zone 10 is 320 °C; add alkali-free continuous glass fiber of the brand ECT4300A-2000 at the feeding port on the side of zone 5, and ensure that the feeding amount of glass fiber reaches 10 parts by mass by controlling the main machine feeding amount and the main machine speed.

[0059] Comparative Example 3

[0060] Prepare the PPS composite material through the following steps:

[0061] (1) Weigh 60 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (316 °C, 5 kg) and a number average molecular weight of 50,000, 15 parts by mass of chopped glass fiber, 10 parts by mass of alkali-free continuous glass fiber, 5 parts by mass of nano-aluminum oxide, 1.5 parts by mass of carbon nanotubes, 4 parts by mass of conductive carbon black, 5 parts by mass of potassium titanate whiskers, 0.5 parts by mass of KH-560 coupling agent, and 0.5 parts by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0062] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion granulation to obtain a PPS composite material; the screw length-diameter ratio of the co-rotating twin-screw extruder used is 35:1; it includes ten temperature control zones, and the temperatures of each zone are controlled respectively as follows: zone 1 is 230 °C, zone 2 is 280 °C, zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, and zone 10 is 320 °C; add alkali-free continuous glass fiber of the brand ECT4300A-2000 at the feeding port on the side of zone 5, and by controlling the main machine feeding amount and the main machine rotation speed, ensure that the feeding amount of glass fiber reaches 10 parts by mass.

[0063] Comparative Example 4

[0064] The PPS composite material is prepared through the following steps:

[0065] (1) Weigh 57 parts by mass of polyphenylene sulfide with a melt index of 430 g / 10 min (316 °C, 5 kg) and a number average molecular weight of 50,000, 15 parts by mass of chopped glass fiber, 10 parts by mass of alkali-free continuous glass fiber, 5 parts by mass of nano-aluminum oxide, 7 parts by mass of TPU, 5 parts by mass of potassium titanate whiskers, 0.5 parts by mass of KH-560 coupling agent, and 0.5 parts by mass of antioxidant, and perform high-speed stirring and pre-dispersion in a mixer for 10 min to obtain a mixed material;

[0066] (2) Add the mixed material to a co-rotating twin-screw extruder for melt extrusion granulation to obtain a PPS composite material; the screw length-diameter ratio of the co-rotating twin-screw extruder used is 35:1; it includes ten temperature control zones, and the temperatures of each zone are controlled respectively as follows: zone 1 is 230 °C, zone 2 is 280 °C, zone 3 is 310 °C, zone 4 is 290 °C, zone 5 is 260 °C, zone 6 is 240 °C, zone 7 is 290 °C, zone 8 is 300 °C, zone 9 is 300 °C, and zone 10 is 320 °C; add alkali-free continuous glass fiber of the brand ECT4300A-2000 at the feeding port on the side of zone 5, and by controlling the main machine feeding amount and the main machine rotation speed, ensure that the feeding amount of glass fiber reaches 10 parts by mass.

[0067] The composite materials prepared in Examples 1-2 and Comparative Examples 1-4 were subjected to performance tests, with tensile strength, elongation at break, flexural strength, flexural modulus, coefficient of friction, volume resistivity, notch impact strength, and electromagnetic shielding effectiveness as the test indicators. The results are shown in Table 1 below:

[0068] Table 1 Performance test results of PPS composite materials in examples and comparative examples

[0069] As can be seen from Table 1, compared with Comparative Examples 1-4, the PPS composite materials obtained in the examples of the present invention have significantly improved in various performances, especially in terms of tensile strength, flexural modulus, coefficient of friction, volume resistivity, notch impact strength, and electromagnetic shielding effectiveness, which fully demonstrates the application advantages of the composite materials of the present invention in key components of humanoid robots.

[0070] It should be noted that the above are only the preferred embodiments of the present invention, and they should not limit the protection scope of the technical solutions of the present invention. Any modifications made by those of ordinary skill in the art to the technical solutions recorded in the foregoing embodiments and any equivalent replacements of technical features within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A PPS high-strength and temperature-resistant composite material, characterized in that: The invention comprises the following raw material components: 35-55 parts by weight of polyphenylene sulfide, 20-40 parts by weight of a composite reinforcing agent, and 2-8 parts by weight of a toughening agent; 3-9 parts by mass of conductive agent, 3-7 parts by mass of potassium titanate whisker, 0.2-0.5 parts by mass of coupling agent and 0.1-1 parts by mass of antioxidant, wherein the composite reinforcing agent comprises two or more reinforcing agents of different shapes and / or sizes.

2. The PPS high-strength and temperature-resistant composite material according to claim 1, characterized in that: in, The composite reinforcing agent includes two or more of glass fiber, carbon fiber and other inorganic fillers; and / or the toughening agent is selected from thermoplastic polyurethane and / or a terpolymer containing epoxy groups; and / or the conductive agent is selected from carbon nanotubes and / or conductive carbon black; and / or the coupling agent is selected from silane coupling agents; and / or the potassium titanate whisker is selected from fibrous potassium titanate whiskers; and / or the antioxidant is selected from hindered phenol antioxidants and / or phosphite antioxidants.

3. The PPS high-strength and temperature-resistant composite material according to claim 2, characterized in that: The other inorganic fillers include one or more of nano alumina, calcium carbonate, talc, nano montmorillonite, wollastonite, aluminum hydroxide, hollow glass microspheres, kaolin, barium sulfate, zinc oxide whiskers, mica powder, nano silicon dioxide, magnesium oxide, and molybdenum disulfide.

4. The PPS high-strength and temperature-resistant composite material according to claim 2, characterized in that: in, The carbon fiber is selected from short-cut carbon fibers with a length of 1-3 mm; and / or the glass fiber is selected from alkali-free continuous glass fibers.

5. The PPS high-strength and temperature-resistant composite material according to claim 1, characterized in that: The composite reinforcing agent is selected from short-cut carbon fiber, alkali-free continuous glass fiber and nano-alumina; the toughening agent is selected from thermoplastic polyurethane elastomer; the conductive agent is selected from carbon nanotubes and conductive carbon black; and the coupling agent is selected from silane coupling agent.

6. The PPS high-strength and temperature-resistant composite material according to claim 5, characterized in that: The mass ratio of chopped carbon fiber, alkali-free continuous glass fiber and nano-alumina in the composite reinforcing agent is 3-2.5:1:2-1.3; the mass ratio of carbon nanotubes and conductive carbon black in the conductive agent is 0.3-0.5:

1.

7. The PPS high-strength and temperature-resistant composite material according to claim 1, characterized in that: The number average molecular weight of the polyphenylene sulfide is 5×10 4 -1×10 5 .

8. The method for preparing the PPS high-strength and temperature-resistant composite material according to any one of claims 1 to 7, characterized in that: The composite reinforcing agent comprises glass fiber, carbon fiber and other inorganic fillers, and the preparation method comprises the following steps: (1) mixing other raw materials except glass fiber at high speed to obtain a mixed material; (2) adding the mixed material into a co-rotating twin-screw extruder, and adding glass fiber from a side feed port of the extruder, and performing melt extrusion granulation at 230-320° C. to obtain the PPS high-strength and temperature-resistant composite material.

9. The preparation method according to claim 8, characterized in that: in, The screw length-to-diameter ratio of the co-rotating twin-screw extruder used is 35:1, and / or the co-rotating twin-screw extruder used includes ten temperature control zones in sequence. During the extrusion process, the temperature of each zone is controlled as follows: 230°C in zone one, 280°C in zone two, 310°C in zone three, 290°C in zone four, 260°C in zone five, 240°C in zone six, 290°C in zone seven, 300°C in zone eight, 300°C in zone nine and 320°C in zone ten, and the side feeding port is located on the side of zone five.

10. Use of the PPS high-strength and heat-resistant composite material according to any one of claims 1 to 7 or the PPS high-strength and heat-resistant composite material prepared by the preparation method according to claim 8 or 9 in a humanoid robot.

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