High-strength weather-resistant PP material for cable filling rope and preparation method of high-strength weather-resistant PP material

Abstract

The invention relates to the technical field of high polymer materials, and discloses a high-strength weather-resistant PP material for cable filling ropes and a preparation method thereof, the high-strength weather-resistant PP material comprises the following raw materials by mass: 90-100 parts of polypropylene resin, 4-5 parts of a weather-resistant filler, 5-7 parts of a reinforcing filler, 0.4-0.6 part of an antioxidant, and 0.5-0.8 part of a light stabilizer. The weather-resistant filler can overcome the defect that the polypropylene material is easy to age under the action of light, heat and oxygen, so that the cable filling rope prepared from the polypropylene material has higher weather resistance; the reinforcing filler can form a stress transfer network in the polypropylene material, so that the mechanical strength of the polypropylene material is enhanced, and the filling rope prepared from the polypropylene material has relatively high mechanical performance.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and specifically relates to a high-strength weather-resistant PP material for cable filling ropes and a preparation method thereof. Background Art

[0002] In the production process of multi-core cables, in order to make the cabled cores round and improve the appearance quality, it is necessary to fill the gaps between the insulated cores during cabling. The selection of the filling material plays a crucial role in the roundness of the cable. The commonly used filling materials mainly include filling ropes, which can be randomly combined in different specifications to meet the needs of different gap shapes and areas, and are easy to use. The filling ropes can also assist in improving the tensile resistance and swing resistance of the cable, so they are widely used.

[0003] PP (polypropylene) has the advantages of low density, good heat resistance, excellent flexural fatigue resistance, excellent chemical stability and electrical properties, etc., and is an excellent material for making cable filling ropes. However, PP contains unstable tertiary carbon groups, which are prone to aging degradation after the action of light, heat and oxygen, resulting in performance decline and affecting the use performance of cable filling ropes. Moreover, the filling ropes prepared from polypropylene materials currently have poor strength and are easy to break, resulting in a decline in the roundness and compressive and tensile resistance of the cables after the prepared filling ropes are used in cables, and cannot meet the requirements of medium wire and cable. Summary of the Invention

[0004] The present invention provides a high-strength weather-resistant PP material for cable filling ropes and a preparation method thereof, which solves the problems of poor weather resistance and mechanical strength of PP materials for cable filling ropes.

[0005] The technical solution of the present invention: A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 90-100 parts of polypropylene resin, 4-5 parts of weather-resistant filler, 5-7 parts of reinforcing filler, 0.4-0.6 part of antioxidant, and 0.5-0.8 part of light stabilizer; The weather-resistant filler is obtained by reacting urea and nitrate complex, then mixing with citric acid and 2-phenylbenzimidazole-5-sulfonic acid solution, performing a hydrothermal reaction, and then reacting with polydimethylsiloxane and boric acid; The reinforcing filler is obtained by mixing and reacting phytic acid, silane coupling agent and sea urchin spike grains, and then mixing and reacting with lamellar porous carbon, carboxymethyl cellulose and chitosan.

[0006] A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix the polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant and light stabilizer, and stir at 70-90 °C and 800-1000 r / min for 5-10 min to obtain a mixed material; S2. Place the mixture in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material.

[0007] Further, the antioxidant is selected from any one of antioxidant 1010, antioxidant 168, and antioxidant DSTP.

[0008] Further, the light stabilizer is selected from any one of benzotriazole light stabilizers, benzophenone light stabilizers, and hindered amine light stabilizers.

[0009] Further, the process conditions of the twin-screw extruder are as follows: the temperature of the first zone is 180 - 190 °C, the temperature of the second zone is 190 - 210 °C, the temperature of the third zone is 210 - 230 °C, the temperature of the fourth zone is 220 - 230 °C, the temperature of the fifth zone is 210 - 220 °C, and the die temperature is 200 - 210 °C; The screw diameter is 30 - 40 mm, and the screw length-diameter ratio is (45 - 50):1.

[0010] Further, the weather-resistant filler is specifically prepared by the following steps: A1. Mix magnesium nitrate hexahydrate, nickel nitrate hexahydrate, and aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to deionized water, stir evenly, add urea, stir evenly, carry out a hydrothermal reaction at 100 - 110 °C for 20 - 24 h, cool to room temperature, filter, wash, and dry to obtain magnesium nickel aluminum hydrotalcite; A2. Add 2-phenylbenzimidazole-5-sulfonic acid to deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7 - 8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 80 - 100 °C for 5 - 6 h, react at 175 - 185 °C for 2 - 4 h, cool to room temperature, filter, wash, and dry to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add polydimethylsiloxane and modified magnesium nickel aluminum hydrotalcite to isopropyl alcohol, stir evenly, add boric acid, stir evenly, heat up to 70 - 80 °C, stir and react at 450 - 500 r / min for 25 - 35 min, after condensation and reflux, cool to room temperature, filter, wash, and dry to obtain the weather-resistant filler.

[0011] Further, during the reaction process of A1, magnesium nitrate hexahydrate, nickel nitrate hexahydrate, and aluminum nitrate nonahydrate are mixed to form a nitrate complex, and carry out a hydrothermal reaction with urea at 100 - 110 °C to form a layered structure ternary magnesium nickel aluminum hydrotalcite with exchangeable anions.

[0012] Further, during the above A2 reaction process, citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution carry negative charges, causing citric acid to be dispersed in the 2-phenylbenzimidazole-5-sulfonic acid solution. 2-Phenylbenzimidazole-5-sulfonic acid can undergo an exchange reaction with the anionic groups between the layers of magnesium nickel aluminum hydrotalcite, enabling citric acid and 2-phenylbenzimidazole-5-sulfonic acid to act between the layers of magnesium nickel aluminum hydrotalcite. Further, after treatment at 175 - 185 °C, citric acid decomposes upon heating to form nano-carbon dots, and thus nano-carbon dots are formed between the layers of magnesium nickel aluminum hydrotalcite, obtaining modified magnesium nickel aluminum hydrotalcite.

[0013] Further, during the above A3 reaction process, the silanol groups contained in polydimethylsiloxane can react with the hydroxyl groups in boric acid to form a cross-linked network structure, and the hydroxyl groups of polydimethylsiloxane can also combine with the hydroxyl groups on the surface of modified magnesium nickel aluminum hydrotalcite, causing the cross-linked network-structured polysiloxane to be coated on the surface of modified magnesium nickel aluminum hydrotalcite as a weather-resistant filler.

[0014] Further, in step A1, the dosage ratio of magnesium nitrate hexahydrate, nickel nitrate hexahydrate, aluminum nitrate nonahydrate, deionized water, and urea is (11 - 12) g : (6 - 7) g : (8 - 9) g : (140 - 160) mL : (18 - 22) g.

[0015] Further, in step A2, the dosage ratio of 2-phenylbenzimidazole-5-sulfonic acid, deionized water, citric acid, and magnesium nickel aluminum hydrotalcite is (4 - 4.6) g : (140 - 160) mL : (3 - 4) g : (17 - 18) g.

[0016] Further, in step A3, the dosage ratio of polydimethylsiloxane, modified magnesium nickel aluminum hydrotalcite, isopropanol, and boric acid is (1 - 2) g : (3 - 4) g : (35 - 45) mL : (0.1 - 0.3) g.

[0017] Further, the reinforcing filler is specifically prepared by the following steps: B1. Add a silane coupling agent to ethanol and deionized water, stir evenly, add hydrochloric acid to adjust the pH to 4.5 - 5.5, add sea urchin spike grains, react at 70 - 80 °C for 10 - 20 min, add phytic acid, and continue to react for 20 - 30 min. After filtration, washing, and drying, obtain modified sea urchin spike grains; B2. Add the modified sea urchin spike grains to deionized water, stir evenly, add lamellar porous carbon, stir and mix at 600 - 800 r / min for 10 - 12 h. After filtration, washing, and drying, obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add the lamellar porous carbon loaded with modified sea urchin spikes into deionized water, add chitosan, after ultrasonic treatment, add acetic acid and carboxymethyl cellulose, stir evenly, add glutaraldehyde solution, stir and react at 50 - 60 °C for 1 - 2 h, and obtain the reinforcing filler after freeze-drying.

[0018] Furthermore, during the above B1 reaction process, the hydroxyl groups generated by the hydrolysis of the silane coupling agent can combine with the hydroxyl groups on the surface of the sea urchin spikes through chemical bonds, and the amino groups contained in the silane coupling agent can combine with the oxygen-containing functional groups in phytic acid, so that phytic acid is coated on the surface of the sea urchin spikes through the silane coupling agent, and modified sea urchin spikes are obtained.

[0019] Furthermore, during the above B2 reaction process, the lamellar porous carbon has a rich pore structure and a super high specific surface area, and the phytic acid on the surface of the modified sea urchin spikes contains a large number of oxygen-containing functional groups. Using the uniformly distributed pore structure in the lamellar porous carbon, the modified sea urchin spikes are uniformly distributed on the surface of the lamellar porous carbon, and the lamellar porous carbon loaded with modified sea urchin spikes is obtained.

[0020] Furthermore, during the above B3 reaction process, using carboxymethyl cellulose and chitosan as the aerogel skeleton and glutaraldehyde as the cross-linking agent, carboxymethyl cellulose and chitosan form a cross-linked structure aerogel, and the phytic acid contained in the lamellar porous carbon loaded with modified sea urchin spikes can also participate in the cross-linking reaction, so that the lamellar porous carbon loaded with modified sea urchin spikes is embedded in the aerogel structure as the reinforcing filler.

[0021] Furthermore, in step B1, the dosage ratio of the silane coupling agent, ethanol, deionized water, sea urchin spikes and phytic acid is (1 - 2) g : (90 - 100) mL : (3 - 7) mL : (5.2 - 5.4) g : (3 - 3.4) g.

[0022] Furthermore, in step B2, the dosage ratio of the modified sea urchin spikes, deionized water and lamellar porous carbon is (1 - 2) g : (90 - 110) mL : (3 - 4) g.

[0023] Furthermore, in step B3, the dosage ratio of the lamellar porous carbon loaded with modified sea urchin spikes, deionized water, chitosan, acetic acid, carboxymethyl cellulose and glutaraldehyde solution is (0.5 - 0.7) g : (80 - 100) mL : (1 - 2) g : (0.2 - 0.4) mL : (18 - 22) g : (25 - 35) mL.

[0024] Furthermore, the silane coupling agent is γ-aminopropyltriethoxysilane.

[0025] The present invention has the following beneficial effects: (1) In the technical solution of the present invention, magnesium nitrate hexahydrate, nickel nitrate hexahydrate, aluminum nitrate nonahydrate and urea react to form a layered structure of ternary magnesium-nickel-aluminum hydrotalcite, which can absorb ultraviolet light, enhance the anti-ultraviolet aging performance of polypropylene materials, and the ternary magnesium-nickel-aluminum hydrotalcite can also enhance the heat resistance of polypropylene materials, thereby reducing the aging effect of light and heat on polypropylene materials; citric acid acts between the layers of magnesium-nickel-aluminum hydrotalcite through 2-phenylbenzimidazole-5-sulfonic acid. As an organic ultraviolet absorption material, 2-phenylbenzimidazole-5-sulfonic acid is intercalated between the layers of magnesium-nickel-aluminum hydrotalcite, enhancing the weather resistance of polypropylene materials and facilitating the synthesis of carbon nanodots between the layers of magnesium-nickel-aluminum hydrotalcite.

[0026] (2) In the technical solution of the present invention, after citric acid and 2-phenylbenzimidazole-5-sulfonic acid act between the layers of magnesium-nickel-aluminum hydrotalcite and are subjected to high-temperature treatment, on the one hand, citric acid decomposes thermally to form carbon nanodots. The synthesized carbon nanodots have excellent ultraviolet absorption performance, can enhance the anti-aging performance of polypropylene materials, and the carbon nanodots form a concave-convex structure between the layers of magnesium-nickel-aluminum hydrotalcite. By reflecting and scattering ultraviolet light, the ultraviolet light path is extended, thereby reducing the penetration depth of ultraviolet light and enhancing the weather resistance of polypropylene materials. On the other hand, 2-phenylbenzimidazole-5-sulfonic acid has a strong electrostatic interaction with the layer board, and the imidazole group can also form a hydrogen bond with the layer board to form an intramolecular hydrogen bond structure. The benzene ring contained in 2-phenylbenzimidazole-5-sulfonic acid can interact with the carbon nanodots, thereby increasing the binding force of the carbon nanodots between the layers and avoiding the weak binding force of the carbon nanodots between the layers of magnesium-nickel-aluminum hydrotalcite and easy precipitation during the stretching process of polypropylene materials, which affects the weather resistance of polypropylene materials.

[0027] (3) In the technical solution of the present invention, polysiloxane with a crosslinked network structure is coated on the surface of modified magnesium-nickel-aluminum hydrotalcite. The polysiloxane structure has a hydrophobic structure, which makes the weather-resistant filler evenly dispersed in the polypropylene material, improves the weather resistance of the polypropylene material, and the hydrophobic structure can improve the waterproof performance of the polypropylene material, shielding water and oxygen molecules in the air and preventing water and oxygen molecules in the air from contacting polypropylene and causing aging. In addition, the weather-resistant filler can solve the disadvantage that polypropylene materials are easily aged under the action of light, heat and oxygen, so that the cable filling rope prepared from polypropylene materials has high weather resistance.

[0028] (4) In the technical solution of the present invention, phytic acid is coated on the surface of sea urchin spike grains through a silane coupling agent to obtain modified sea urchin spike grains. On the one hand, the sea urchin spike grains ground into nano-powders of sea urchin spines contain components such as calcium oxide and magnesium oxide. As rigid fillers, they can improve the mechanical strength of polypropylene materials and also have relatively high thermal stability, synergistically enhancing the heat resistance of polypropylene materials with weather-resistant fillers. On the other hand, phytic acid is coated on the surface of sea urchin spike grains through a silane coupling agent, improving the surface activity of sea urchin spike grains, facilitating the uniform distribution of sea urchin spike grains on the surface of lamellar porous carbon, and enhancing the mechanical strength.

[0029] (5) In the technical solution of the present invention, the modified sea urchin spike grains are uniformly distributed on the surface of lamellar porous carbon to form an uneven structure capable of absorbing stress, enhancing the mechanical strength of polypropylene materials. Moreover, the lamellar porous carbon is interpenetrated and arranged, capable of forming a stress transfer network in polypropylene materials, enhancing the mechanical strength of polypropylene materials, such that the filling ropes prepared from polypropylene materials have relatively high mechanical properties. The lamellar porous carbon loaded with modified sea urchin spike grains is embedded in the carboxymethyl cellulose and chitosan aerogel structure, increasing the crosslinking density and enhancing the mechanical strength of the aerogel, thereby improving the mechanical properties of polypropylene materials. Additionally, the porous structure of the aerogel has excellent heat resistance stability, improving the heat resistance of polypropylene materials. Specific Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0031] The raw materials used in the embodiments of the present invention are as follows, and all the reagents used are of analytical grade.

[0032] Among them, the polypropylene resin has a melt flow rate of 6 g / 10 min at 230 °C and 2.16 kg.

[0033] The antioxidant is antioxidant 1010, and the light stabilizer is benzotriazole light stabilizer TH-944.

[0034] The polydimethylsiloxane is hydroxyl-terminated polydimethylsiloxane.

[0035] The silane coupling agent is γ-aminopropyltriethoxysilane, and the degree of deacetylation of chitosan is 92.3%.

[0036] The sea urchins are natural sea urchins, purchased from Chaozhou Rongtian Aquatic Products Trading Co., Ltd.

[0037] The sea urchin spike grains are specifically prepared by the following steps: Extract spines with a length of 5.5 cm from sea urchins. The spines are conical cylinders and are dried at 30 °C to remove the moisture in the spines. The dried spines are crushed into fine powder and placed in a ball mill for grinding to obtain sea urchin spike grains. Among them, the particle size of the sea urchin spike grains is 150 nm, the ball milling time is 16 h, the milling speed is 300 r / min, the ball mill is a planetary ball mill with a load capacity of 10 g, the ball material is tungsten carbide, the diameter is 10 mm, the ball-powder ratio is 10.5:1, and the total weight of the used balls is 55 g.

[0038] The lamellar porous carbon is specifically prepared by the following steps: The sycamore leaves are washed with deionized water, dried in an oven at 60 °C and ground into 2 mm powder. 1 g of the powder is added to 100 mL of acetic acid solution and reacted at 150 °C for 3 h. After centrifugation, it is washed 5 times with deionized water to remove water-soluble impurities, dried in an oven at 80 °C for 10 min to obtain dry powder. 1 g of the dry powder and 3 g of zinc chloride are placed in a tube furnace, nitrogen is introduced, the temperature is raised to 700 °C, carbonized for 3 h, cooled to room temperature, the product is taken out, washed 2 times with hydrochloric acid, washed 3 times with deionized water, and dried in an oven at 80 °C for 2 h to obtain lamellar porous carbon. Among them, the particle size of the lamellar porous carbon is 2 μm and the pore diameter is 50 nm.

[0039] Example 1

[0040] A high-strength weather-resistant PP material for cable filling ropes includes the following raw materials in parts by mass: 90 parts of polypropylene resin, 4 parts of weather-resistant filler, 5 parts of reinforcing filler, 0.4 part of antioxidant 1010, and 0.5 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes includes the following preparation steps: S1. Mix the polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010 and benzotriazole light stabilizer TH-944, and stir at 70 °C and 800 r / min for 5 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 180 °C, the temperature of the second zone is 190 °C, the temperature of the third zone is 210 °C, the temperature of the fourth zone is 220 °C, the temperature of the fifth zone is 210 °C, and the die head temperature is 200 °C; The screw diameter is 30 mm and the screw length-diameter ratio is 45:1.

[0041] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 11 g of magnesium nitrate hexahydrate, 6 g of nickel nitrate hexahydrate, and 8 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 140 mL of deionized water, stir evenly, add 18 g of urea, stir evenly, carry out a hydrothermal reaction at 100 °C for 20 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4 g of 2-phenylbenzimidazole-5-sulfonic acid to 140 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 3 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 17 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 80 °C for 5 h, react at 175 °C for 2 h, cool to room temperature, wash with deionized water 3 times, and dry in an oven at 100 °C for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 1 g of polydimethylsiloxane and 3 g of modified magnesium nickel aluminum hydrotalcite to 35 mL of isopropanol, stir evenly, add 0.1 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 70 °C, stir and react at 450 r / min for 25 min, continue to react for 20 min when bubbles form during 110 °C condensation reflux, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain a weather-resistant filler.

[0042] The reinforcing filler is specifically prepared by the following steps: B1. Add 1 g of γ-aminopropyltriethoxysilane to 90 mL of ethanol and 3 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 4.5, add 5.2 g of sea urchin spike grains, react at 70 °C for 10 min, add 3 g of phytic acid, and continue to react for 20 min. Filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 1 g of modified sea urchin spike grains to 90 mL of deionized water, stir evenly, add 3 g of lamellar porous carbon, stir and mix at 600 r / min for 10 h, filter, wash with deionized water 3 times, wash with ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; Example 2 B3. Add 0.5 g of lamellar porous carbon loaded with modified sea urchin spike grains to 80 mL of deionized water, add 1 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.2 mL of acetic acid and 18 g of carboxymethyl cellulose, stir evenly, add 25 mL of a 2% glutaraldehyde solution, stir and react at 50 °C for 1 - 2 h, and freeze at -50 °C for 24 h to obtain the reinforcing filler.

[0043] Example 2

[0044] A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 95 parts of polypropylene resin, 4.5 parts of weather-resistant filler, 6 parts of reinforcing filler, 0.5 part of antioxidant 1010, and 0.7 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 80°C and 900 r / min for 8 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 185°C, the temperature of the second zone is 200°C, the temperature of the third zone is 220°C, the temperature of the fourth zone is 225°C, the temperature of the fifth zone is 215°C, and the die head temperature is 205°C; The screw diameter is 35 mm, and the screw length-diameter ratio is 48:1.

[0045] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 11.5 g of magnesium nitrate hexahydrate, 6.5 g of nickel nitrate hexahydrate, and 8.4 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 150 mL of deionized water, stir evenly, add 20 g of urea, stir evenly, carry out a hydrothermal reaction at 105°C for 22 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80°C oven for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.3 g of 2-phenylbenzimidazole-5-sulfonic acid to 150 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7.5 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 3.5 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 17.5 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 90°C for 5.5 h, react at 180°C for 3 h, cool to room temperature, wash with deionized water 3 times, and dry in a 100°C oven for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 1.5 g of polydimethylsiloxane and 3.5 g of modified magnesium nickel aluminum hydrotalcite to 40 mL of isopropanol, stir evenly, add 0.2 g of boric acid, stir at 40°C for 30 min, raise the temperature to 75°C, stir and react at 480 r / min for 30 min, continue to react for 20 min when bubbles are formed by 110°C condensation reflux, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80°C oven for 10 min to obtain the weather-resistant filler.

[0046] The reinforcing filler is prepared specifically by the following steps: B1. Add 1.5 g of γ-aminopropyltriethoxysilane to 95 mL of ethanol and 5 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5, add 5.3 g of sea urchin spike grains, react at 75 °C for 15 min, add 3.2 g of phytic acid, continue to react for 25 min, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 1.5 g of modified sea urchin spike grains to 100 mL of deionized water, stir evenly, add 3.5 g of lamellar porous carbon, stir and mix at 700 r / min for 11 h, filter, wash with deionized water 3 times, wash with ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add 0.6 g of lamellar porous carbon loaded with modified sea urchin spike grains to 90 mL of deionized water, add 1.5 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.3 mL of acetic acid and 20 g of carboxymethyl cellulose, stir evenly, add 30 mL of a 2% glutaraldehyde solution, stir and react at 55 °C for 1.5 h, and freeze at -50 °C for 24 h to obtain the reinforcing filler.

[0047] Example 3

[0048] A high-strength weather-resistant PP material for cable filling ropes comprises the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of reinforcing filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes comprises the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are as follows: the temperature of zone 1 is 190 °C, the temperature of zone 2 is 210 °C, the temperature of zone 3 is 230 °C, the temperature of zone 4 is 230 °C, the temperature of zone 5 is 220 °C, and the die head temperature is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0049] The weather-resistant filler is prepared specifically by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate, and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, conduct a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water three times, and dry in an oven at 80 °C for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7 - 8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 4 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 18 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water three times, and dry in an oven at 100 °C for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 80 °C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles form under 110 °C condensation reflux, cool to room temperature, filter, wash with deionized water three times, and dry in an oven at 80 °C for 10 min to obtain a weather-resistant filler.

[0050] The reinforcing filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, and continue to react for 30 min. Filter, wash with deionized water three times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 2 g of modified sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h, filter, wash with deionized water three times, wash with ethanol twice, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add 0.7 g of lamellar porous carbon loaded with modified sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain the reinforcing filler.

[0051] Comparative Example 1 A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of reinforcing filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 90°C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 190°C, the temperature of the second zone is 210°C, the temperature of the third zone is 230°C, the temperature of the fourth zone is 230°C, the temperature of the fifth zone is 220°C, and the die head temperature is 210°C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0052] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate, and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110°C for 24 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80°C oven for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7-8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Add 18 g of magnesium nickel aluminum hydrotalcite to the 2-phenylbenzimidazole-5-sulfonic acid solution, introduce nitrogen, stir at 100°C for 6 h, react at 185°C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in a 100°C oven for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40°C for 30 min, raise the temperature to 80°C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles are formed by 110°C condensation reflux, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80°C oven for 10 min to obtain the weather-resistant filler.

[0053] The reinforcing filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, and continue to react for 30 min. After filtration, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 2 g of modified sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h. After filtration, wash with deionized water 3 times and wash with ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add 0.7 g of lamellar porous carbon loaded with modified sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain an enhanced filler.

[0054] Comparative Example 2 A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of enhanced filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, enhanced filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 220 °C, and the die head temperature is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0055] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate and 9 g of aluminium nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water three times, and dry in an oven at 80 °C for 10 min to obtain magnesium nickel aluminium hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7 - 8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 4 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 18 g of magnesium nickel aluminium hydrotalcite, introduce nitrogen, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water three times, and dry in an oven at 100 °C for 10 min to obtain a weather-resistant filler.

[0056] The enhanced filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, continue to react for 30 min, filter, wash with deionized water three times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 2 g of modified sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h, filter, wash with deionized water three times and wash with ethanol twice, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add 0.7 g of lamellar porous carbon loaded with modified sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain the enhanced filler.

[0057] Comparative Example 3 A high-strength weather-resistant PP material for cable filling ropes comprises the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of enhanced filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes comprises the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010 and benzotriazole light stabilizer TH-944, and stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are as follows: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 220 °C, and the die temperature is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0058] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4 g of citric acid and 18 g of magnesium nickel aluminum hydrotalcite to 150 mL of deionized water, stir evenly, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 100 °C for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 80 °C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles are formed by condensation reflux at 110 °C, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain the weather-resistant filler.

[0059] The reinforcing filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, and continue to react for 30 min. Filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 2 g of modified sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h, filter, wash with deionized water 3 times and wash with ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with modified sea urchin spike grains; B3. Add 0.7 g of lamellar porous carbon loaded with modified sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain the reinforcing filler.

[0060] Comparative Example 4 A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of reinforcing filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 220 °C, and the die head temperature is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0061] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate, and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7 - 8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 4 g of citric acid with the 2-phenylbenzimidazole-5-sulfonic acid solution, add 18 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 100 °C for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 80 °C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles form under 110 °C condensation reflux, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain a weather-resistant filler.

[0062] The enhanced filler is specifically prepared by the following steps: B1. Add 2 g of sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h, filter, wash with deionized water 3 times and ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain lamellar porous carbon loaded with sea urchin spike grains; B2. Add 0.7 g of lamellar porous carbon loaded with sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain the enhanced filler.

[0063] Comparative Example 5 A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of enhanced filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, enhanced filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are as follows: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 220 °C, and the temperature of the die head is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0064] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80 °C oven for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7-8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 4 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 18 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in a 100 °C oven for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 80 °C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles are formed by condensation reflux at 110 °C, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80 °C oven for 10 min to obtain the weather-resistant filler.

[0065] The reinforcing filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, and continue to react for 30 min. Filter, wash with deionized water 3 times, and dry in an 80 °C oven for 10 min to obtain modified sea urchin spike grains; B2. Add 0.7 g of modified sea urchin spike grains to 100 mL of deionized water, add 2 g of chitosan, ultrasonically treat at 50 KHz for 30 min, add 0.4 mL of acetic acid and 22 g of carboxymethyl cellulose, stir evenly, add 35 mL of a 2% glutaraldehyde solution, stir and react at 60 °C for 2 h, and freeze at -50 °C for 24 h to obtain the reinforcing filler.

[0066] Comparative Example 6 A high-strength weather-resistant PP material for cable filling ropes, comprising the following raw materials in parts by mass: 100 parts of polypropylene resin, 5 parts of weather-resistant filler, 7 parts of reinforcing filler, 0.6 part of antioxidant 1010, and 0.8 part of benzotriazole light stabilizer TH-944; A preparation method of a high-strength weather-resistant PP material for cable filling ropes, comprising the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant 1010, and benzotriazole light stabilizer TH-944, and stir at 90 °C and 1000 r / min for 10 min to obtain a mixed material; S2. Place the mixed material in a twin-screw extruder, extrude and pelletize to obtain a high-strength weather-resistant PP material; Among them, the process conditions of the twin-screw extruder are: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 220 °C, and the die head temperature is 210 °C; The screw diameter is 40 mm, and the screw length-diameter ratio is 50:1.

[0067] The weather-resistant filler is specifically prepared by the following steps: A1. Mix 12 g of magnesium nitrate hexahydrate, 7 g of nickel nitrate hexahydrate, and 9 g of aluminum nitrate nonahydrate to obtain a nitrate complex. Add the nitrate complex to 160 mL of deionized water, stir evenly, add 22 g of urea, stir evenly, carry out a hydrothermal reaction at 110 °C for 24 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80 °C oven for 10 min to obtain magnesium nickel aluminum hydrotalcite; A2. Add 4.6 g of 2-phenylbenzimidazole-5-sulfonic acid to 160 mL of deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7-8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution. Mix 4 g of citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add 18 g of magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 100 °C for 6 h, react at 185 °C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in a 100 °C oven for 10 min to obtain modified magnesium nickel aluminum hydrotalcite; A3. Add 2 g of polydimethylsiloxane and 4 g of modified magnesium nickel aluminum hydrotalcite to 45 mL of isopropanol, stir evenly, add 0.3 g of boric acid, stir at 40 °C for 30 min, raise the temperature to 80 °C, stir and react at 500 r / min for 35 min, continue to react for 20 min when bubbles are formed by condensation reflux at 110 °C, cool to room temperature, filter, wash with deionized water 3 times, and dry in an 80 °C oven for 10 min to obtain the weather-resistant filler.

[0068] The reinforcing filler is specifically prepared by the following steps: B1. Add 2 g of γ-aminopropyltriethoxysilane to 100 mL of ethanol and 7 mL of deionized water, stir evenly, add hydrochloric acid with a concentration of 1 mol / L to adjust the pH to 5.5, add 5.4 g of sea urchin spike grains, react at 80 °C for 20 min, add 3.4 g of phytic acid, continue to react for 30 min, filter, wash with deionized water 3 times, and dry in an oven at 80 °C for 10 min to obtain modified sea urchin spike grains; B2. Add 2 g of modified sea urchin spike grains to 110 mL of deionized water, stir evenly, add 4 g of lamellar porous carbon, stir and mix at 800 r / min for 12 h, filter, wash with deionized water 3 times, wash with ethanol 2 times, and dry in an oven at 70 °C for 15 min to obtain the reinforcing filler.

[0069] Now, performance tests are carried out on the high-strength weather-resistant PP materials prepared in Examples 1-3 and Comparative Examples 1-6.

[0070] The above-prepared high-strength weather-resistant PP material is injection-molded for performance testing. Among them, the injection pressure is 100 MPa and the injection temperature is 250 °C. Mechanical property test: According to the GB / T1843-2008 standard, the notched impact performance of the above-prepared high-strength weather-resistant PP material is measured; according to the GB / T1040.3-2006 standard, the tensile strength and elongation at break of the above-prepared high-strength weather-resistant PP material are measured.

[0071] Heat distortion temperature: Measured by the ASTM D648 test method, the heat distortion temperature at 1.82 MPa; Weather resistance test: According to the ISO4892-2 standard, after the high-strength weather-resistant PP material is placed in an aging oven for accelerated aging for 80 h, the tensile strength and elongation at break are measured.

[0072] The test results are shown in Table 1 below.

[0073] Table 1 Performance test of high-strength weather-resistant PP materials prepared in Examples 1-3 and Comparative Examples 1-6

[0074] It can be seen from the data in Table 1 that the high-strength weather-resistant PP materials prepared in Examples 1-3 have high mechanical strength and weather resistance.

[0075] The weather-resistant filler prepared without adding citric acid in Comparative Example 1 was added to the PP material, and its weather resistance decreased, which proved that the action of citric acid formed nano carbon dots during the thermal decomposition of the magnesium nickel aluminum hydrotalcite layer, with excellent absorption performance. Moreover, the nano carbon dots formed an uneven structure between the magnesium nickel aluminum hydrotalcite layers. By reflecting and scattering ultraviolet rays, the ultraviolet light path was extended, thereby reducing the penetration depth of ultraviolet rays and enhancing the weather resistance of the polypropylene material.

[0076] The weather-resistant filler prepared without adding polydimethylsiloxane and boric acid in Comparative Example 2 was added to the PP material, and its weather resistance decreased, which proved that polydimethylsiloxane and boric acid formed a cross-linked network structure of polysiloxane coating on the surface of the modified magnesium nickel aluminum hydrotalcite, shielding water and oxygen molecules in the air, and preventing water and oxygen molecules in the air from contacting with polypropylene and causing aging, thus improving the weather resistance of the polypropylene material.

[0077] The weather-resistant filler prepared without adding 2-phenylbenzimidazole-5-sulfonic acid in Comparative Example 3 was added to the PP material, and its weather resistance decreased, which proved that 2-phenylbenzimidazole-5-sulfonic acid, as an organic ultraviolet absorber, could enhance the weather resistance of the polypropylene material. Moreover, 2-phenylbenzimidazole-5-sulfonic acid had a strong electrostatic interaction with the lamellar structure, and the imidazole group could also form a hydrogen bond with the lamellar structure to form an intramolecular hydrogen bond structure. The benzene ring contained in 2-phenylbenzimidazole-5-sulfonic acid could interact with the nano carbon dots, thereby increasing the binding force of the nano carbon dots between the layers and preventing the weak binding force of the nano carbon dots between the magnesium nickel aluminum hydrotalcite layers during the stretching process of the polypropylene material, which was easy to precipitate and affect the weather resistance of the polypropylene material.

[0078] The reinforcing filler prepared by replacing the modified sea urchin spike grains with sea urchin spike grains in Comparative Example 4 was added to the PP material, and its mechanical properties decreased, which proved that the sea urchin spike grains, as a rigid filler, could improve the mechanical strength of the polypropylene material. Moreover, phytic acid was coated on the surface of the sea urchin spike grains through a silane coupling agent, improving the surface activity of the sea urchin spike grains, which was beneficial to the uniform distribution of the sea urchin spike grains on the surface of the lamellar porous carbon and enhancing the mechanical strength.

[0079] The reinforcing filler prepared by replacing the lamellar porous carbon loaded with modified sea urchin spike grains with modified sea urchin spike grains in Comparative Example 5 was added to the PP material, and its mechanical properties decreased, which proved that the modified sea urchin spike grains were uniformly distributed on the surface of the lamellar porous carbon, forming an uneven structure that could absorb stress and enhancing the mechanical strength of the polypropylene material. Moreover, the lamellar porous carbons were interpenetrated and arranged, which could form a stress transfer network in the polypropylene material and enhance the mechanical strength of the polypropylene material, making the filling rope prepared from the polypropylene material have high mechanical properties.

[0080] The reinforcing filler prepared without adding chitosan and carboxymethyl cellulose in Comparative Example 6 was added to the PP material, and its wear resistance and mechanical properties decreased, which proved that the porous structure of the carboxymethyl cellulose and chitosan aerogel has excellent heat stability, and the lamellar porous carbon loaded with modified sea urchin spike grains is embedded in the carboxymethyl cellulose and chitosan aerogel structure, increasing the crosslinking density and enhancing the mechanical strength of the aerogel.

[0081] In the description of the specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the scope defined by the invention, they should all belong to the protection scope of the present invention.

Claims

1. A high-strength weather-resistant PP material for cable filling rope, characterized in that: The method comprises the following raw materials in parts by weight: 90-100 parts of polypropylene resin, 4-5 parts of weather-resistant filler, 5-7 parts of reinforcing filler, 0.4-0.6 parts of antioxidant, and 0.5-0.8 parts of light stabilizer; The weather-resistant filler is obtained by reacting urea and a nitrate complex, then mixing with citric acid and 2-phenylbenzimidazole-5-sulfonic acid solution, and then reacting with polydimethylsiloxane and boric acid after a hydrothermal reaction; The reinforcing filler is obtained by mixing and reacting phytic acid, a silane coupling agent and sea urchin spikes, and then mixing and reacting with lamellar porous carbon, carboxymethyl cellulose and chitosan.

2. The high-strength weather-resistant PP material for cable filling rope according to claim 1, characterized in that: The weather-resistant filler is specifically prepared by the following steps: A1. Mix magnesium nitrate hexahydrate, nickel nitrate hexahydrate and aluminum nitrate nonahydrate to obtain a nitrate complex, add the nitrate complex to deionized water, stir evenly, add urea, stir evenly, perform a hydrothermal reaction at 100-110° C. for 20-24 h, cool to room temperature, filter, wash, and dry to obtain magnesium-nickel-aluminum hydrotalcite; A2. Add 2-phenylbenzimidazole-5-sulfonic acid to deionized water, stir evenly, add sodium hydroxide to adjust the pH to 7-8 to obtain a 2-phenylbenzimidazole-5-sulfonic acid solution, mix citric acid and the 2-phenylbenzimidazole-5-sulfonic acid solution, add magnesium nickel aluminum hydrotalcite, introduce nitrogen, stir at 80-100 ° C for 5-6h, react at 175-185 ° C for 2-4h, cool to room temperature, filter, wash, and dry to obtain a modified magnesium nickel aluminum hydrotalcite; A3. Add polydimethylsiloxane and modified magnesium nickel aluminum hydrotalcite to isopropanol, stir evenly, add boric acid, stir evenly, heat to 70-80°C, stir and react at 450-500r / min for 25-35min, condense and reflux, cool to room temperature, filter, wash and dry to obtain a weather-resistant filler.

3. The high-strength weather-resistant PP material for cable filling rope according to claim 2, characterized in that: In step A1, the ratio of magnesium nitrate hexahydrate, nickel nitrate hexahydrate, aluminum nitrate nonahydrate, deionized water and urea is (11-12) g: (6-7) g: (8-9) g: (140-160) mL: (18-22) g.

4. The high-strength weather-resistant PP material for cable filling rope according to claim 2, characterized in that: In step A2, the ratio of 2-phenylbenzimidazole-5-sulfonic acid, deionized water, citric acid and magnesium nickel aluminum hydrotalcite is (4-4.6) g: (140-160) mL: (3-4) g: (17-18) g.

5. The high-strength weather-resistant PP material for cable filling rope according to claim 2, characterized in that: In step A3, the amount ratio of the polydimethylsiloxane, modified magnesium nickel aluminum hydrotalcite, isopropyl alcohol and boric acid is (1-2) g: (3-4) g: (35-45) mL: (0.1-0.3) g.

6. The high-strength weather-resistant PP material for cable filling rope according to claim 1, characterized in that: The reinforcing filler is specifically prepared by the following steps: B1. Add the silane coupling agent to ethanol and deionized water, stir evenly, add hydrochloric acid to adjust the pH to 4.5-5.5, add sea urchin spike grains, react at 70-80 ° C for 10-20 min, add phytic acid, continue to react for 20-30 min, filter, wash, and dry to obtain modified sea urchin spike grains; B2. The modified sea urchin spike particles were added to deionized water, stirred evenly, and the lamellar porous carbon was added, stirred and mixed at 600-800r / min for 10-12h, filtered, washed, and dried to obtain a lamellar porous carbon loaded with modified sea urchin spike particles; B3. Add the lamellar porous carbon loaded with modified sea urchin spikes into deionized water, add chitosan, and after ultrasonic treatment, add acetic acid and carboxymethyl cellulose, stir evenly, add glutaraldehyde solution, stir and react at 50-60°C for 1-2h, and freeze-dry to obtain a reinforced filler.

7. The high-strength weather-resistant PP material for cable filling rope according to claim 6, characterized in that: In step B1, the ratio of the silane coupling agent, ethanol, deionized water, sea urchin spike particles and phytic acid is (1-2) g: (90-100) mL: (3-7) mL: (5.2-5.4) g: (3-3.4) g.

8. The high-strength weather-resistant PP material for cable filling rope according to claim 6, characterized in that: In step B2, the ratio of the modified sea urchin spike particles, deionized water and lamellar porous carbon is (1-2) g: (90-110) mL: (3-4) g.

9. The high-strength weather-resistant PP material for cable filling rope according to claim 6, characterized in that: In step B3, the amount ratio of the lamellar porous carbon loaded with modified sea urchin spikes, deionized water, chitosan, acetic acid, carboxymethyl cellulose and glutaraldehyde solution is (0.5-0.7) g: (80-100) mL: (1-2) g: (0.2-0.4) mL: (18-22) g: (25-35) mL.

10. A method for preparing a high-strength weather-resistant PP material for cable filling rope according to any one of claims 1 to 9, characterized in that: The method comprises the following preparation steps: S1. Mix polypropylene resin, weather-resistant filler, reinforcing filler, antioxidant and light stabilizer, and stir at 70-90° C. and 800-1000 r / min for 5-10 min to obtain a mixture; S2. Place the mixed material in a twin-screw extruder, extrude and granulate to obtain a high-strength weather-resistant PP material.

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