High-strength weather-resistant wire and cable material for unmanned aerial vehicle and preparation method of high-strength weather-resistant wire and cable material

Abstract

The invention relates to the technical field of cable material preparation, in particular to a high-strength weather-resistant wire and cable material for an unmanned aerial vehicle and a preparation method of the high-strength weather-resistant wire and cable material. The wire and cable material is prepared from the following raw materials: modified polyether-ether-ketone resin, nano silicon dioxide, titanium dioxide, trioctyl trimellitate, a silane coupling agent, an ultraviolet light absorber, an antioxidant and polytetrafluoroethylene micro powder. The preparation method of the wire and cable material comprises the following steps: (1) putting the modified polyether-ether-ketone resin, the nano silicon dioxide, the titanium dioxide, the trioctyl trimellitate, the silane coupling agent, the ultraviolet light absorber, the antioxidant and the polytetrafluoroethylene micro powder into a high-speed mixer, and uniformly mixing to obtain a premix; and (2) adding the premix into a twin-screw extruder, and carrying out melt blending extrusion and granulation to obtain the wire and cable material. The wire and cable material is high in limit oxygen index, excellent in vertical combustion performance, good in flame retardant effect, excellent in mechanical property, good in damp-heat aging resistance, high in volume resistivity and excellent in electrical insulation performance.

Description

Technical Field

[0001] This application relates to the field of cable material preparation technology, and more specifically, it relates to a high-strength weather-resistant wire and cable material for unmanned aerial vehicles and its preparation method. Background Technology

[0002] As a core component of power transmission and signal control for unmanned aerial vehicles (UAVs), the performance of cables directly determines the flight safety, mission stability, and service life of the UAVs. With the continuous expansion of UAV application scenarios, they have widely covered complex environments such as disaster relief, engineering monitoring, forest fire prevention, field operations, and national defense. These cables must withstand harsh conditions such as strong winds, alternating high and low temperatures, ultraviolet radiation, and humid salt spray corrosion over long periods, while also meeting the requirement for lightweight cable materials due to the limited payload capacity of UAVs.

[0003] Existing drone cable materials mostly use traditional polyethylene (PE), polyvinyl chloride (PVC), or ordinary rubber, which have several performance shortcomings: First, they lack mechanical strength and have generally low tensile strength, making them prone to breakage during drone take-off, landing, and retrieval, and unsuitable for scenarios requiring long-term hovering operations, such as tethered drones. Second, they have poor weather resistance, easily cracking at low temperatures and softening at high temperatures, and are prone to aging and degradation after long-term ultraviolet radiation, significantly shortening their service life. Third, some materials have poor compatibility; adding antistatic agents, weather-resistant agents, and other functional additives can easily lead to a decrease in the material's mechanical properties, failing to meet multi-dimensional performance requirements. Furthermore, existing cable materials often have an excessive weight, increasing drone flight energy consumption and limiting their endurance. To solve these technical problems, there is an urgent need to develop a drone wire and cable material that combines high strength, excellent weather resistance, lightweight, and synergistic compatibility among various properties to adapt to the operational needs of drones in complex environments and improve the reliability and service life of drone cables. Summary of the Invention

[0004] To address the technical problems mentioned in the background section, this application provides a high-strength weather-resistant wire and cable material for unmanned aerial vehicles and its preparation method.

[0005] A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60-75 parts modified polyetheretherketone resin, 5-10 parts nano-silica, 3-6 parts titanium dioxide, 6-10 parts trioctyl trimellitate, 1-3 parts silane coupling agent, 0.8-1.5 parts ultraviolet absorber, 0.5-1.2 parts antioxidant, and 0.3-0.8 parts polytetrafluoroethylene micro powder.

[0006] Preferably, the preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing aromatic heterocyclic monomers, add an alkali metal carbonate catalyst, and heat to 280-300℃ under inert gas protection, stir for 2-3 hours, continue heating to 320-340℃, and reduce pressure to 10-100 Pa; when the viscosity of the system reaches 1.8-2.5 dL / g, stop the pressure reduction and restore the inert gas in the reactor to atmospheric pressure, add the end-capping agent, and stir at 330-350℃ for 0.5-1 hours to terminate the polymerization reaction and obtain intermediate 1; Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330-350℃ under inert gas protection, shear and blend for 1-2 hours, then transfer to a twin-screw extruder for melt blending extrusion and granulation to obtain modified polyether ether ketone resin.

[0007] Preferably, in step 1, the mass ratio of 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing aromatic heterocyclic monomers is 10-12:9-11:3-5.

[0008] Preferably, the aromatic diphenol containing aromatic heterocyclic monomers in step 1 is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a mass ratio of 1-1.2:0.5-0.8.

[0009] Preferably, the capping agent in step 1 is one or more of methyl paraben, phenol, p-tert-butylphenol, and p-phenylphenol.

[0010] Preferably, in step 2, the mass ratio of intermediate 1, poly(adipamide) and fluororubber FKM is 100-120:35-40:28-42.

[0011] Preferably, the temperatures of each section of the twin-screw extruder in step 2 are: 290-310℃ for the feeding section, 330-350℃ for the melting section, 340-360℃ for the homogenization section, and 335-345℃ for the die head section.

[0012] Preferably, the ultraviolet absorber is one or more of 2,2'-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole.

[0013] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed evenly to obtain a premix. (2) Add the premixed material into the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300-320℃, melting section 340-360℃, homogenization section 350-370℃, and die head section 345-355℃. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0014] In summary, this application has the following beneficial effects: This application utilizes aromatic diphenols containing aromatic heterocyclic monomers, a blend of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine, in the preparation of modified polyetheretherketone resin. These diphenols, in conjunction with 4,4'-difluorobenzophenone and hydroquinone, undergo precise polymerization. Simultaneously, the viscosity of the system is controlled by strictly regulating the polymerization temperature, rotation speed, and reduced pressure conditions. This allows intermediate 1 to form a stable and high-performance molecular chain structure, laying the foundation for improved resin strength. By blending intermediate 1 with a specific ratio of poly(adipamide) and fluororubber FKM, and adding maleic anhydride-grafted polyolefin elastomer as a compatibilizer, combined with a high-temperature, high-speed shearing and precisely temperature-controlled twin-screw extrusion process, the three components achieve efficient compatibility, significantly improving the toughness and mechanical stability of the modified polyetheretherketone resin and overcoming the performance limitations of single resins. By optimizing the ratio of aromatic diphenols containing aromatic heterocyclic monomers, polymerization termination conditions, and blending process parameters, the prepared modified polyetheretherketone resin combines the high-temperature resistance of polyetheretherketone with the aging resistance of poly(dibutylene adipamide) and fluororubber FKM. This results in wire and cable materials with excellent high strength and weather resistance, making them suitable for use in the complex flight environment of UAVs. Furthermore, the combination of aromatic diphenols containing aromatic heterocyclic monomers further enhances the intermolecular forces of the resin compared to single-monomer modification, thereby improving the overall performance stability of the cable material. Detailed Implementation

[0015] The present application will be further described in detail below with reference to the embodiments.

[0016] The polytetrafluoroethylene micro powder used in the examples and comparative examples of this application was purchased from Dongguan Shengli New Materials Co., Ltd.; trioctyl trimellitate was purchased from Guangzhou Baida Trading Co., Ltd.; nano silica was purchased from Jinan Leihe Trading Co., Ltd.; titanium dioxide (brand name: BLR-896) was purchased from Guangzhou Yinuo Chemical Technology Co., Ltd.; 2,2'-hydroxy-4-methoxybenzophenone was purchased from Nanjing Milan Chemical Co., Ltd.; 4,4'-difluorobenzophenone was purchased from Wuhan Yuancheng Chemical Co., Ltd.; 4-amino-2,5-dihydroxypyridine was purchased from Hubei Shishun Biotechnology Co., Ltd.; 2-amino-4,6-dihydroxypyrimidine was purchased from Hubei Huiheyuan Chemical Co., Ltd.; poly(adipamide) (brand name: 46SF5030) was purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd.; fluororubber FKM was purchased from Aifudiem (Anhui) New Materials Co., Ltd.; and maleic anhydride-grafted polyolefin elastomer (model: HH5050XVNPYI) was purchased from Dongguan Shengli New Materials Co., Ltd.

[0017] Examples 1-3 provide a high-strength weather-resistant wire and cable material for unmanned aerial vehicles and its preparation method.

[0018] Example 1 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60 parts modified polyetheretherketone resin, 5 parts nano-silica, 3 parts titanium dioxide, 6 parts trioctyl trimellitate, 1 part silane coupling agent, 0.8 parts ultraviolet absorber, 0.5 parts antioxidant, and 0.3 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0019] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers in a mass ratio of 10:9:3. Add potassium carbonate, and under nitrogen protection, heat to 280℃ and stir at 200 rpm for 2 hours. Continue heating to 320℃ and reduce the pressure to 10 Pa. When the system viscosity reaches 1.8 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add methylparaben and stir at 330℃. The stirring speed was 200 rpm, and the mixture was kept at a constant temperature and stirred for 0.5 h to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic diphenol containing the aromatic heterocyclic monomer is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a 1:0.5 ratio. The amount of potassium carbonate added is 3% of the mass of 4,4'-difluorobenzophenone, and the amount of methylparaben added is 2% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic diphenol containing the aromatic heterocyclic monomer. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 100:35:28 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330°C under nitrogen protection, and shear blend at a shear rate of 800 rpm for 1 hour. Then transfer to a twin-screw extruder, and control the temperature of each section of the twin-screw extruder as follows: feed section 290°C, melt section 330°C, homogenization section 340°C, and die head section 335°C. Melt-blend extrusion and granulation are carried out at a screw speed of 200 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 1% of the mass of the mixture.

[0020] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 40 minutes at a stirring speed of 400 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melting section 340℃, homogenization section 350℃, die head section 345℃, and screw speed 100rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0021] Example 2 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 68 parts modified polyetheretherketone resin, 8 parts nano-silica, 4.5 parts titanium dioxide, 8 parts trioctyl trimellitate, 3 parts silane coupling agent, 1.2 parts ultraviolet absorber, 0.8 parts antioxidant, and 0.5 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0022] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers at a mass ratio of 11:10:4. Add potassium carbonate, and under nitrogen protection, heat to 290℃ and stir at 300 rpm for 2.5 hours. Continue heating to 330℃ and reduce the pressure to 50 Pa. When the system viscosity reaches 2.2 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add methylparaben and heat at 340℃. The stirring speed was 300 rpm, and the mixture was kept at a constant temperature for 0.8 h to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic diphenol containing the aromatic heterocyclic monomer is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a ratio of 1.1:0.7. The amount of potassium carbonate added is 4% of the mass of 4,4'-difluorobenzophenone, and the amount of methylparaben added is 3% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic diphenol containing the aromatic heterocyclic monomer. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 110:38:35 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 340℃ under nitrogen protection, and shear blend at a shear rate of 900 rpm for 1.5 h, then transfer to a twin-screw extruder. Control the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melt section 340℃, homogenization section 350℃, and die head section 340℃. Melt blend extrusion and granulation are performed at a screw speed of 250 rpm to obtain modified polyetheretherketone resin, wherein the amount of maleic anhydride-grafted polyolefin elastomer added is 2% of the mass of the mixture.

[0023] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 500 rpm for 50 min to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 310℃, melting section 350℃, homogenization section 360℃, die head section 350℃, and screw speed 150rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0024] Example 3 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 75 parts modified polyetheretherketone resin, 10 parts nano-silica, 6 parts titanium dioxide, 10 parts trioctyl trimellitate, 3 parts silane coupling agent, 1.5 parts ultraviolet absorber, 1.2 parts antioxidant, and 0.8 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0025] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers at a mass ratio of 12:11:5. Add potassium carbonate, and under nitrogen protection, heat to 300℃ and stir at 400 rpm for 3 hours. Continue heating to 340℃ and reduce pressure to 100 Pa. When the system viscosity reaches 2.5 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add methylparaben and heat at 350℃. The stirring speed was 400 rpm, and the mixture was kept at the temperature and stirred for 1 hour to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic diphenol containing the aromatic heterocyclic monomer is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a ratio of 1.2:0.8. The amount of potassium carbonate added is 5% of the mass of 4,4'-difluorobenzophenone, and the amount of methylparaben added is 4% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic diphenol containing the aromatic heterocyclic monomer. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 120:40:42 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 350℃ under nitrogen protection, and shear blend at a shear rate of 1000 rpm for 2 hours. Then transfer to a twin-screw extruder, control the temperature of each section of the twin-screw extruder as follows: feed section 310℃, melt section 350℃, homogenization section 360℃, and die head section 345℃. Melt blend extrusion and granulation are carried out at a screw speed of 300 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 3% of the mass of the mixture.

[0026] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 60 minutes at a stirring speed of 600 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 320℃, melting section 360℃, homogenization section 370℃, die head section 355℃, and screw speed 200rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0027] Comparative Example 1 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60 parts modified polyetheretherketone resin, 5 parts nano-silica, 3 parts titanium dioxide, 6 parts trioctyl trimellitate, 1 part silane coupling agent, 0.8 parts ultraviolet absorber, 0.5 parts antioxidant, and 0.3 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0028] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers at a mass ratio of 10:9:3. Add potassium carbonate, and under nitrogen protection, heat to 280℃ and stir at 200 rpm for 2 hours. Continue heating to 320℃ and reduce the pressure to 10 Pa. When the system viscosity reaches 1.8 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add p-hydroxybenzoic acid. Methyl benzoate was subjected to a stirring at 330°C and 200 rpm for 0.5 h to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic heterocyclic monomer, methyl benzoate, was 2-amino-4,6-dihydroxypyrimidine; potassium carbonate was added at 3% of the mass of 4,4'-difluorobenzophenone; and methyl hydroxybenzoate was added at 2% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic heterocyclic monomer. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 100:35:28 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330°C under nitrogen protection, and shear blend at a shear rate of 800 rpm for 1 hour. Then transfer to a twin-screw extruder, and control the temperature of each section of the twin-screw extruder as follows: feed section 290°C, melt section 330°C, homogenization section 340°C, and die head section 335°C. Melt-blend extrusion and granulation are carried out at a screw speed of 200 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 1% of the mass of the mixture.

[0029] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 40 minutes at a stirring speed of 400 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melting section 340℃, homogenization section 350℃, die head section 345℃, and screw speed 100rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0030] Comparative Example 2 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60 parts modified polyetheretherketone resin, 5 parts nano-silica, 3 parts titanium dioxide, 6 parts trioctyl trimellitate, 1 part silane coupling agent, 0.8 parts ultraviolet absorber, 0.5 parts antioxidant, and 0.3 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0031] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers at a mass ratio of 10:9:3. Add potassium carbonate, and under nitrogen protection, heat to 280℃ and stir at 200 rpm for 2 hours. Continue heating to 320℃ and reduce the pressure to 10 Pa. When the system viscosity reaches 1.8 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add p-hydroxybenzoic acid. Methyl benzoate was subjected to a stirring at 330°C and 200 rpm for 0.5 h to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic heterocyclic monomer, methyl benzoate, was 4-amino-2,5-dihydroxypyridine; potassium carbonate was added at 3% of the mass of 4,4'-difluorobenzophenone; and methyl hydroxybenzoate was added at 2% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic heterocyclic monomer. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 100:35:28 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330°C under nitrogen protection, and shear blend at a shear rate of 800 rpm for 1 hour. Then transfer to a twin-screw extruder, and control the temperature of each section of the twin-screw extruder as follows: feed section 290°C, melt section 330°C, homogenization section 340°C, and die head section 335°C. Melt-blend extrusion and granulation are carried out at a screw speed of 200 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 1% of the mass of the mixture.

[0032] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 40 minutes at a stirring speed of 400 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melting section 340℃, homogenization section 350℃, die head section 345℃, and screw speed 100rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0033] Comparative Example 3 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60 parts modified polyetheretherketone resin, 5 parts nano-silica, 3 parts titanium dioxide, 6 parts trioctyl trimellitate, 1 part silane coupling agent, 0.8 parts ultraviolet absorber, 0.5 parts antioxidant, and 0.3 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0034] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone and hydroquinone at a mass ratio of 10:12, add potassium carbonate, and under nitrogen protection, heat to 280℃ and stir at 200 rpm for 2 hours. Continue heating to 320℃ and reduce pressure to 10 Pa. When the system viscosity reaches 1.8 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add methylparaben and stir at 330℃ at 200 rpm for 0.5 hours to terminate the polymerization reaction, obtaining intermediate 1. The amount of potassium carbonate added is 3% of the mass of 4,4'-difluorobenzophenone, and the amount of methylparaben added is 2% of the total mass of 4,4'-difluorobenzophenone and hydroquinone. Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM at a mass ratio of 100:35:28 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330°C under nitrogen protection, and shear blend at a shear rate of 800 rpm for 1 hour. Then transfer to a twin-screw extruder, and control the temperature of each section of the twin-screw extruder as follows: feed section 290°C, melt section 330°C, homogenization section 340°C, and die head section 335°C. Melt-blend extrusion and granulation are carried out at a screw speed of 200 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 1% of the mass of the mixture.

[0035] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 40 minutes at a stirring speed of 400 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melting section 340℃, homogenization section 350℃, die head section 345℃, and screw speed 100rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0036] Comparative Example 4 A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) comprises the following raw materials in parts by weight: 60 parts modified polyetheretherketone resin, 5 parts nano-silica, 3 parts titanium dioxide, 6 parts trioctyl trimellitate, 1 part silane coupling agent, 0.8 parts ultraviolet absorber, 0.5 parts antioxidant, and 0.3 parts polytetrafluoroethylene micro powder. The silane coupling agent is KH-560, the ultraviolet absorber is 2,2'-hydroxy-4-methoxybenzophenone, and the antioxidant is antioxidant 1010.

[0037] The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing heterocyclic monomers in a mass ratio of 10:9:3. Add potassium carbonate, and under nitrogen protection, heat to 280℃ and stir at 200 rpm for 2 hours. Continue heating to 320℃ and reduce the pressure to 10 Pa. When the system viscosity reaches 1.8 dL / g, stop the pressure reduction and restore the nitrogen atmosphere in the reactor to atmospheric pressure. Add methylparaben and stir at 330℃. The stirring speed was 200 rpm, and the mixture was kept at a constant temperature and stirred for 0.5 h to terminate the polymerization reaction, yielding intermediate 1. In this intermediate, the aromatic diphenol containing the aromatic heterocyclic monomer is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a 1:0.5 ratio. The amount of potassium carbonate added is 3% of the mass of 4,4'-difluorobenzophenone, and the amount of methylparaben added is 2% of the total mass of 4,4'-difluorobenzophenone, hydroquinone, and the aromatic diphenol containing the aromatic heterocyclic monomer. Step 2: Mix intermediate 1 and poly(adipamide) at a mass ratio of 100:63 to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330°C under nitrogen protection, and shear blend at a shear rate of 800 rpm for 1 hour. Then transfer to a twin-screw extruder, and control the temperature of each section of the twin-screw extruder as follows: feed section 290°C, melt section 330°C, homogenization section 340°C, and die head section 335°C. Melt blend extrusion and granulation are carried out at a screw speed of 200 rpm to obtain modified polyetheretherketone resin. The amount of maleic anhydride-grafted polyolefin elastomer added is 1% of the mass of the mixture.

[0038] A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs) includes the following preparation steps: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed for 40 minutes at a stirring speed of 400 rpm to obtain a premix. (2) Add the premixed material to the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300℃, melting section 340℃, homogenization section 350℃, die head section 345℃, and screw speed 100rpm. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

[0039] Performance testing The performance of the high-strength weather-resistant wire and cable materials for UAVs prepared in Examples 1-3 and Comparative Examples 1-4 was tested, as follows: Limiting Oxygen Index (LOI): Tested according to national standard GB / T 2406.2-2009 "Determination of Combustion Behavior by Oxygen Index Method for Plastics - Part 2: Room Temperature Test": Tensile strength and elongation at break: Tested in accordance with national standard GB / T 1040.1-2018 "Determination of tensile properties of plastics - Part 1: General". Bending strength: Tested in accordance with national standard GB / T 9341-2008 "Determination of bending properties of plastics"; Resistance to damp heat aging: Referring to the national standard GB / T 2951.12-2008 "General test methods for insulation and sheathing materials of cables and optical cables - Part 12: General test methods - thermal aging test method", the resistance to damp heat aging of cable materials is characterized by the retention rate of limiting oxygen index after 1000 hours at a temperature of 85℃ and a relative humidity of 85%. Volume resistivity: Tested in accordance with national standard GB / T 31838.2-2019 "Dielectric and resistive properties of solid insulating materials - Part 2: Resistive properties (DC method) - Volume resistivity and volume resistivity"; The test results are shown in Table 1.

[0040] Table 1 Performance parameters of high-strength weather-resistant wire and cable materials for UAVs in Examples 1-3 and Comparative Examples 1-4 As shown in Table 1, the high-strength weather-resistant wire and cable material for UAVs prepared in this application exhibits good flame retardancy and a high limiting oxygen index (LOI). It also demonstrates good tensile strength and elongation at break, indicating that the cable material can withstand significant tensile forces and possesses excellent elastic deformation capabilities during tensile testing, making it suitable for long-term use in complex installation environments. Furthermore, the material shows minimal performance degradation after aging in humid and high-temperature environments, and exhibits high volume resistivity and excellent electrical insulation properties.

[0041] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high-strength, weather-resistant wire and cable material for unmanned aerial vehicles (UAVs), characterized in that, The raw materials include the following parts by weight: 60-75 parts modified polyether ether ketone resin, 5-10 parts nano silica, 3-6 parts titanium dioxide, 6-10 parts trioctyl trimellitate, 1-3 parts silane coupling agent, 0.8-1.5 parts ultraviolet absorber, 0.5-1.2 parts antioxidant, and 0.3-0.8 parts polytetrafluoroethylene micro powder.

2. The high-strength weather-resistant wire and cable material for UAVs according to claim 1, characterized in that, The preparation method of the modified polyetheretherketone resin includes the following preparation steps: Step 1: Mix 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing aromatic heterocyclic monomers, add an alkali metal carbonate catalyst, and heat to 280-300℃ under inert gas protection, stir for 2-3 hours, continue heating to 320-340℃, and reduce pressure to 10-100 Pa; when the viscosity of the system reaches 1.8-2.5 dL / g, stop the pressure reduction and restore the inert gas in the reactor to atmospheric pressure, add the end-capping agent, and stir at 330-350℃ for 0.5-1 hours to terminate the polymerization reaction and obtain intermediate 1; Step 2: Mix intermediate 1, poly(adipamide) and fluororubber FKM to obtain a mixture; add maleic anhydride-grafted polyolefin elastomer to the mixture, heat to 330-350℃ under inert gas protection, shear and blend for 1-2 hours, then transfer to a twin-screw extruder for melt blending extrusion and granulation to obtain modified polyether ether ketone resin.

3. The high-strength weather-resistant wire and cable material for UAVs according to claim 2, characterized in that, In step 1, the mass ratio of 4,4'-difluorobenzophenone, hydroquinone, and aromatic diphenol containing aromatic heterocyclic monomers is 10-12:9-11:3-5.

4. The high-strength weather-resistant wire and cable material for UAVs according to claim 2, characterized in that, In step 1, the aromatic diphenol containing aromatic heterocyclic monomers is composed of 4-amino-2,5-dihydroxypyridine and 2-amino-4,6-dihydroxypyrimidine in a mass ratio of 1-1.2:0.5-0.

8.

5. The high-strength weather-resistant wire and cable material for UAVs according to claim 2, characterized in that, In step 1, the capping agent is one or more of methyl paraben, phenol, p-tert-butylphenol, and p-phenylphenol.

6. The high-strength weather-resistant wire and cable material for UAVs according to claim 2, characterized in that, In step 2, the mass ratio of intermediate 1, poly(adipamide) and fluororubber FKM is 100-120:35-40:28-42.

7. The high-strength weather-resistant wire and cable material for UAVs according to claim 2, characterized in that, In step 2, the temperatures of each section of the twin-screw extruder are as follows: feed section 290-310℃, melting section 330-350℃, homogenization section 340-360℃, and die head section 335-345℃.

8. The high-strength weather-resistant wire and cable material for UAVs according to claim 1, characterized in that, The ultraviolet absorber is one or more of 2,2'-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole.

9. A method for preparing a high-strength, weather-resistant wire and cable material for unmanned aerial vehicles according to any one of claims 1-8, characterized in that, The preparation steps include the following: (1) Modified polyether ether ketone resin, nano silica, titanium dioxide, trioctyl trimellitate, silane coupling agent, ultraviolet absorber, antioxidant and polytetrafluoroethylene micro powder are put into a high-speed mixer and mixed evenly to obtain a premix. (2) Add the premixed material into the twin-screw extruder and set the temperature of each section of the twin-screw extruder as follows: feed section 300-320℃, melting section 340-360℃, homogenization section 350-370℃, and die head section 345-355℃. Perform melt blending extrusion and granulation to obtain high-strength weather-resistant wire and cable material for UAVs.

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