Photo-thermal aging resistant photovoltaic cable and preparation method thereof

Abstract

The invention relates to a photo-thermal aging resistant photovoltaic cable and a preparation method thereof, and belongs to the technical field of high polymer materials. The photo-thermal aging resistant photovoltaic cable is composed of a conductor wire core, and an insulating layer, a filling layer and an outer sheath which are sequentially coated on the outer side of the conductor wire core, the outer sheath is prepared from the following raw materials in parts by weight: 80-120 parts of polyvinyl chloride resin, 3-5 parts of a modified anti-aging agent, 2-8 parts of a modified flame retardant, 1-3 parts of dioctyl phthalate, 10-20 parts of nano silicon dioxide, 1-3 parts of butyl stearate and 3-5 parts of zinc stearate; the photo-thermal aging resistant photovoltaic cable prepared by the invention not only has good ultraviolet ray and thermal aging resistant effects, but also has an excellent flame retardant effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a light and heat aging resistant photovoltaic cable and a preparation method thereof. Background Art

[0002] A photovoltaic power generation system (referred to as PV for short) is a power generation system that uses the photovoltaic effect of semiconductor materials to convert solar radiant energy into electrical energy. As a special connecting cable for the power generation system of a PV power station, a photovoltaic cable mainly consists of a copper stranded wire, an insulating layer, and a protective sheath, and has the characteristics of high temperature resistance, cold resistance, oil resistance, acid and alkali resistance, long service life, and environmental protection.

[0003] However, PV devices are generally installed in areas with sufficient sunlight but harsh environments such as deserts, gobi, mountains, and offshore areas. This causes the photovoltaic cable to be exposed to high temperatures and ultraviolet radiation for a long time, resulting in accelerated aging of the cable protective sheath. The fundamental reason is that the stability of PVC is poor, and the dechlorination reaction will be aggravated under ultraviolet irradiation, making the material harden and catalyze, and it is easy to be damaged under external force and lose the protective function. In addition, although PVC has a certain flame retardant effect when burning, with the improvement of actual application requirements, its own flame retardancy no longer meets the requirements. Therefore, researching and developing a light and heat aging resistant photovoltaic cable with excellent properties has important practical significance and application value. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a light and heat aging resistant photovoltaic cable and a preparation method thereof.

[0005] The object of the present invention can be achieved by the following technical solutions: A light and heat aging resistant photovoltaic cable consists of a conductor core and an insulating layer, a filling layer, and an outer sheath sequentially coated on the outer side of the conductor core; Further, the conductor core is a copper conductor core; Further, the outer sheath comprises the following raw materials in parts by weight: 80 - 120 parts of polyvinyl chloride resin, 3 - 5 parts of modified anti-aging agent, 2 - 8 parts of modified flame retardant, 1 - 3 parts of dioctyl phthalate, 10 - 20 parts of nano-silica, 1 - 3 parts of butyl stearate, and 3 - 5 parts of zinc stearate; Further, the modified anti-aging agent is prepared by the following method: Step A1: Mix 1,3-dimethyl-6-aminouracil and acetic acid aqueous solution evenly under ultrasonic conditions, then add formaldehyde, and react at 35°C for 24 h under nitrogen protection. After the reaction is completed, cool to room temperature, filter, wash, and vacuum dry at 60°C for 24 h to obtain a compound; Further, the dosage ratio of 1,3-dimethyl-6-semicarbazide pyrimidine, acetic acid aqueous solution, and formaldehyde is 0.02 - 0.04 mol : 30 mL : 0.01 - 0.02 mol, and the volume ratio of acetic acid to deionized water in the acetic acid aqueous solution is 1 : 9; First, react 1,3-dimethyl-6-semicarbazide pyrimidine with formaldehyde to obtain a compound; Step A2: Add maleic anhydride to a four-necked flask equipped with a thermometer, a condenser, and a mechanical stirring device, heat to 120 °C and stir for 15 min, then cool to 90 °C, add the compound and mix evenly, then add tetrahydrofuran and react for 5 h, rotary evaporate, and dry to obtain a pre-product; Further, the dosage ratio of maleic anhydride, the compound, and tetrahydrofuran is 0.02 - 0.04 mol : 0.01 - 0.02 mol : 10 - 20 mL; Secondly, react the amino group of the compound with maleic anhydride to obtain a pre-product; Step A3: Mix 2,4-dihydroxybenzophenone, the pre-product, and N,N-dimethylformamide evenly, react at 80 - 100 °C for 3 h under nitrogen protection, cool to room temperature, filter, wash, and dry to obtain a modified anti-aging agent; Further, the dosage ratio of 2,4-dihydroxybenzophenone, the pre-product, and N,N-dimethylformamide is 0.1 - 0.2 mol : 0.1 - 0.2 mol : 10 - 20 mL; Finally, react the carboxyl group of the pre-product with the hydroxyl group of 2,4-dihydroxybenzophenone to obtain a modified anti-aging agent.

[0006] Further, the modified flame retardant is prepared by the following method: Step B1: Mix m-chloroaniline and ethanol evenly at 80 °C, then add benzaldehyde and mix evenly, react at 80 °C for 8 h, cool to room temperature, filter, wash, and vacuum dry for 24 h to obtain intermediate 1; Further, the dosage ratio of m-chloroaniline, ethanol, and benzaldehyde is 0.01 - 0.02 mol : 300 mL : 0.01 - 0.02 mol; First, react the amino group of m-chloroaniline with the aldehyde group of benzaldehyde to form intermediate 1; Step B2: Mix intermediate 1, phenylboronic acid, and N,N-dimethylformamide, react at 50 - 100 °C for 5 - 10 h, after cooling to room temperature, filter, wash, and dry to obtain intermediate 2; Further, the dosage ratio of intermediate 1, phenylboronic acid, and N,N-dimethylformamide is 0.1 - 0.2 mol : 0.05 - 0.1 mol : 150 - 300 mL; Secondly, react the chlorine atom of intermediate 1 with phenylboronic acid to form intermediate 2; Step B3: Mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ethanol evenly at 80 °C. Under magnetic stirring, slowly add Intermediate 2 and react for 8 h. Filter, wash, and dry in vacuum for 24 h to obtain the modified flame retardant; Further, the dosage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, ethanol, and Intermediate 2 is 0.02 - 0.04 mol: 300 mL: 0.01 - 0.02 mol; Finally, react Intermediate 2 with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain the modified flame retardant.

[0007] A preparation method of a light and heat aging resistant photovoltaic cable specifically includes the following steps: S1. Weigh the raw materials by weight. Mix polyvinyl chloride resin, modified anti-aging agent, modified flame retardant, dioctyl phthalate, nano-silica, butyl stearate, and zinc stearate, and mix them at a high speed of 2000 rpm for 5 min. Extrude, cool, and pelletize to obtain the outer sheath; S2. Extrude and coat polyethylene on the surface of the conductor core to form an insulating layer. Use polypropylene to fill the surface of the insulating layer to form a filling layer. Extrude and coat the outer sheath on the surface of the filling layer, and cool and solidify to obtain the light and heat aging resistant photovoltaic cable.

[0008] Advantages of the present invention: The light and heat aging resistant photovoltaic cable of the present invention has good ultraviolet and heat aging resistance effects, and at the same time has excellent flame retardant effects, extending the service life.

[0009] In the modified anti-aging agent prepared by the present invention, the carbonyl group in 2,4-dihydroxybenzophenone forms an intramolecular hydrogen bond with the benzene ring, which can efficiently absorb ultraviolet rays, and the excited electrons are transitioned to a higher energy level through molecular vibration and released in the form of weak long waves, reducing the material aging caused by ultraviolet rays; at the same time, the maleimide group enhances the intermolecular force, increases the glass transition temperature and melting point of the material, inhibits the movement of molecular chain segments at high temperatures, and reduces the material aging caused by high-temperature heat aging; in addition, the nitrogen atom in 1,3-dimethyl-6-semicarbazide can capture the alkyl free radicals and peroxy free radicals generated by the thermal degradation of PVC by using its lone pair of electrons, terminate the chain reaction, and delay the thermal oxygen aging process. The amide bond in the pre-product forms a hydrogen bond network with the PVC molecular chain, increases the glass transition temperature of the material, inhibits the movement of chain segments at high temperatures, and reduces the material aging caused by high-temperature heat aging; in addition, the ester bond in the modified anti-aging agent improves the low-temperature toughness of PVC through flexibility and maintains the material stiffness through hydrogen bond action.

[0010] The modified flame retardant prepared by the present invention significantly improves the flame retardancy of the PVC outer sheath through the synergistic effect of boron and phosphorus. In the initial stage of combustion, the boric acid group in intermediate 2 is dehydrated by heat, accelerating carbonization and forming a glassy protective layer, effectively inhibiting the spread of the flame. Its aromatic boric acid structure is transformed into a B-O-C network structure at high temperature, enhancing the stability of the carbon layer. At the same time, the non-combustible gas generated by the decomposition of the boric acid group expands the carbon layer, further improving the flame retardancy. In addition, the phosphorus-nitrogen flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, as a phosphaphenanthrene compound with high thermal stability, promotes the formation of a dense and continuous carbon layer during combustion, isolating heat and oxygen and blocking the exchange of combustible gases, inhibiting combustion, and synergistically flame-retarding with the phosphorus-oxygen double bond to improve the flame retardancy efficiency. In addition, the modified flame retardant prepared by the present invention is halogen-free, which helps to reduce environmental pollution and damage to the ecosystem, is harmless to human health, and realizes sustainable development. Detailed implementation manners

[0011] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0012] Example 1: A preparation method of a light and heat aging resistant photovoltaic cable specifically includes the following steps: S1. Weigh the raw materials by weight. Mix 80 parts of polyvinyl chloride resin, 3 parts of modified anti-aging agent, 2 parts of modified flame retardant, 1 part of dioctyl phthalate, 10 parts of nano-silica, 1 part of butyl stearate, and 3 parts of zinc stearate, and mix them at a high speed of 2000 rpm for 5 minutes. Then extrude, cool, and pelletize to obtain the outer sheath. S2. Extrude and coat polyethylene on the surface of the copper conductor core to form an insulating layer. Use polypropylene to fill on the surface of the insulating layer to form a filling layer. Extrude and coat the outer sheath on the surface of the filling layer, and cool and solidify to obtain the light and heat aging resistant photovoltaic cable. The modified anti-aging agent is prepared by the following method: Step A1: Mix 0.02 mol of 1,3-dimethyl-6-aminouracil and 30 mL of acetic acid aqueous solution evenly under ultrasonic conditions, and then add 0.01 mol of formaldehyde. React at 35 °C for 24 h under nitrogen protection. After the reaction is completed, cool to room temperature, filter, wash, and dry in vacuum at 60 °C for 24 h to obtain the compound. The volume ratio of acetic acid to deionized water in the acetic acid aqueous solution is 1:9. Step A2: Add 0.02 mol of maleic anhydride into a four-necked flask equipped with a thermometer, a condenser and a mechanical stirring device. Heat it up to 120 °C and stir for 15 min, then cool it down to 90 °C, add 0.01 mol of the compound and mix evenly. Then add 10 mL of tetrahydrofuran and react for 5 h. Rotate and evaporate, and dry to obtain a pre-product; Step A3: Mix 0.1 mol of 2,4-dihydroxybenzophenone, 0.1 mol of the pre-product and 10 mL of N,N-dimethylformamide evenly. Under the protection of nitrogen, react at 80 °C for 3 h. Cool to room temperature, filter, wash, and dry to obtain a modified anti-aging agent; The modified flame retardant is prepared by the following method: Step B1: Mix 0.01 mol of m-chloroaniline and 300 mL of ethanol evenly at 80 °C, then add 0.01 mol of benzaldehyde and mix evenly. React at 80 °C for 8 h. Cool to room temperature, filter, wash, and vacuum dry for 24 h to obtain Intermediate 1; Step B2: Mix 0.1 mol of Intermediate 1, 0.05 mol of phenylboronic acid and 150 mL of N,N-dimethylformamide, react at 50 °C for 5 - 10 h. After cooling to room temperature, filter, wash, and dry to obtain Intermediate 2; Step B3: Mix 0.02 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 300 mL of ethanol evenly at 80 °C. Under magnetic stirring, slowly add 0.01 mol of Intermediate 2 and react for 8 h. Filter, wash, and vacuum dry for 24 h to obtain the modified flame retardant.

[0013] Example 2: A preparation method of a photovoltaic cable resistant to light and heat aging, specifically including the following steps: S1. Weigh the raw materials by weight. Mix 100 parts of polyvinyl chloride resin, 4 parts of the modified anti-aging agent, 5 parts of the modified flame retardant, 2 parts of dioctyl phthalate, 15 parts of nano-silica, 2 parts of butyl stearate, and 4 parts of zinc stearate, and mix at a high speed of 2000 rpm for 5 min. Extrude, cool, and pelletize to obtain an outer sheath; S2. Extrude and coat polyethylene on the surface of the copper conductor core to form an insulating layer. Use polypropylene to fill the surface of the insulating layer to form a filling layer. Extrude and coat the outer sheath on the surface of the filling layer, and cool and solidify to obtain a photovoltaic cable resistant to light and heat aging; The modified anti-aging agent is prepared by the following method: Step A1: Mix 0.03 mol of 1,3-dimethyl-6-aminouracil and 30 mL of acetic acid aqueous solution evenly under ultrasonic conditions, then add 0.015 mol of formaldehyde. Under the protection of nitrogen, react at 35 °C for 24 h. After the reaction is completed, cool to room temperature, filter, wash, and vacuum dry at 60 °C for 24 h to obtain a compound. The volume ratio of acetic acid to deionized water in the acetic acid aqueous solution is 1:9; Step A2: Add 0.03 mol of maleic anhydride into a four-necked flask equipped with a thermometer, a condenser and a mechanical stirring device, heat up to 120 °C and stir for 15 min, then cool down to 90 °C, add 0.015 mol of the compound and mix evenly, then add 15 mL of tetrahydrofuran and react for 5 h, rotary evaporate and dry to obtain a pre-product; Step A3: Mix 0.15 mol of 2,4-dihydroxybenzophenone, 0.15 mol of the pre-product and 15 mL of N,N-dimethylformamide evenly, react at 90 °C for 3 h under nitrogen protection, cool to room temperature, filter, wash and dry to obtain a modified anti-aging agent; The modified flame retardant is prepared by the following method: Step B1: Mix 0.015 mol of m-chloroaniline and 300 mL of ethanol evenly at 80 °C, then add 0.015 mol of benzaldehyde and mix evenly, react at 80 °C for 8 h, cool to room temperature, filter, wash and vacuum dry for 24 h to obtain Intermediate 1; Step B2: Mix 0.15 mol of Intermediate 1, 0.075 mol of phenylboronic acid and 225 mL of N,N-dimethylformamide, react at 75 °C for 7.5 h, after cooling to room temperature, filter, wash and dry to obtain Intermediate 2; Step B3: Mix 0.03 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 300 mL of ethanol evenly at 80 °C, under magnetic stirring, slowly add 0.015 mol of Intermediate 2, react for 8 h, filter, wash and vacuum dry for 24 h to obtain a modified flame retardant.

[0014] Example 3: A preparation method of a light and heat aging resistant photovoltaic cable, specifically including the following steps: S1. Weigh the raw materials by weight, mix 120 parts of polyvinyl chloride resin, 5 parts of the modified anti-aging agent, 8 parts of the modified flame retardant, 3 parts of dioctyl phthalate, 20 parts of nano-silica, 3 parts of butyl stearate and 5 parts of zinc stearate, mix at a high speed of 2000 rpm for 5 min, extrude, cool and pelletize to obtain an outer sheath; S2. Extrude and coat polyethylene on the surface of the copper conductor core to form an insulating layer, use polypropylene to fill on the surface of the insulating layer to form a filling layer, extrude and coat the outer sheath on the surface of the filling layer, cool and solidify to obtain a light and heat aging resistant photovoltaic cable; The modified anti-aging agent is prepared by the following method: Step A1: Mix 0.04 mol of 1,3-dimethyl-6-semicarbazidepyrimidine and 30 mL of acetic acid aqueous solution evenly under ultrasonic conditions, then add 0.02 mol of formaldehyde. Under nitrogen protection, react at 35 °C for 24 h. After the reaction is completed, cool to room temperature, filter, wash, and dry in vacuum at 60 °C for 24 h to obtain the compound. The volume ratio of acetic acid to deionized water in the acetic acid aqueous solution is 1:9; Step A2: Add 0.04 mol of maleic anhydride to a four-necked flask equipped with a thermometer, a condenser, and a mechanical stirring device. Heat up to 120 °C and stir for 15 min, then cool down to 90 °C and add 0.02 mol of the compound and mix evenly. Then add 20 mL of tetrahydrofuran and react for 5 h. Rotate and evaporate, and dry to obtain the pre-product; Step A3: Mix 0.2 mol of 2,4-dihydroxybenzophenone, 0.2 mol of the pre-product, and 20 mL of N,N-dimethylformamide evenly. Under nitrogen protection, react at 100 °C for 3 h. Cool to room temperature, filter, wash, and dry to obtain the modified anti-aging agent; The said modified flame retardant is prepared by the following method: Step B1: Mix 0.02 mol of m-chloroaniline and 300 mL of ethanol evenly at 80 °C, then add 0.02 mol of benzaldehyde and mix evenly. React at 80 °C for 8 h. Cool to room temperature, filter, wash, and dry in vacuum for 24 h to obtain Intermediate 1; Step B2: Mix 0.2 mol of Intermediate 1, 0.1 mol of phenylboronic acid, and 300 mL of N,N-dimethylformamide, and react at 100 °C for 10 h. After cooling to room temperature, filter, wash, and dry to obtain Intermediate 2; Step B3: Mix 0.04 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 300 mL of ethanol evenly at 80 °C. Under magnetic stirring, slowly add 0.02 mol of Intermediate 2 and react for 8 h. Filter, wash, and dry in vacuum for 24 h to obtain the modified flame retardant.

[0015] Comparative Example 1: This comparative example is a light and heat aging resistant photovoltaic cable. The difference from Example 3 is that an equal amount of antioxidant 1010 is used instead of the modified anti-aging agent prepared in Example 3, and the rest are the same.

[0016] Comparative Example 2: This comparative example is a light and heat aging resistant photovoltaic cable. The difference from Example 3 is that an equal amount of magnesium hydroxide is used instead of the modified flame retardant prepared in Example 3, and the rest are the same.

[0017] Performance test: Cut the light and heat aging resistant photovoltaic cables prepared in Examples 1 - 3 and Comparative Examples 1 - 2 into standard test sizes; Cut the specimens into 100 mm in length and 50 mm in width, and conduct the test in an ultraviolet aging test chamber. Under the ultraviolet light irradiation at 340 nm, place the samples on a rotating sample rack 20 cm away from the light source (500 W / m 2 , 340 nm), irradiate for 72 h, and measure the color difference before and after the test; Measure the tensile strength according to GB / T 1040.1 - 2018; Test the vertical burning performance using the method in GB / T 2408 - 2008; The test results are shown in Table 1 below: Table 1

[0018] It can be seen from the data tested in Table 1 that the light and heat aging resistant photovoltaic cable prepared by the present invention has good ultraviolet and heat aging resistance effects. It can also be seen from Table 1 that the light and heat aging resistant photovoltaic cable prepared by the present invention has good flame retardant effect and tensile strength, which can extend the service life.

[0019] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications, supplements, or use similar methods to replace the specific embodiments described, as long as they do not deviate from the concept of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A photovoltaic cable resistant to light and heat aging, which is composed of a conductor core and an insulating layer, a filling layer and an outer sheath sequentially coated on the outer side of the conductor core, and is characterized in that, The outer sheath comprises raw materials in the following parts by weight: 80 - 120 parts of polyvinyl chloride resin, 3 - 5 parts of modified anti-aging agent, 2 - 8 parts of modified flame retardant, 1 - 3 parts of dioctyl phthalate, 10 - 20 parts of nano-silica, 1 - 3 parts of butyl stearate, 3 - 5 parts of zinc stearate; The modified anti-aging agent is prepared by the following method: Step A1: Mix 1,3-dimethyl-6-carbamoylpyrimidine and acetic acid aqueous solution evenly under ultrasonic condition, then add formaldehyde, react at 35 °C for 24 h under nitrogen protection. After the reaction is completed, cool to room temperature, filter, wash, and dry in vacuum at 60 °C for 24 h to obtain a compound; Step A2: Add maleic anhydride to a four-necked flask equipped with a thermometer, a condenser and a mechanical stirring device, heat up to 120 °C and stir for 15 min, then cool down to 90 °C, add the compound and mix evenly, then add tetrahydrofuran and react for 5 h, rotary evaporate and dry to obtain a pre-product; Step A3: Mix 2,4-dihydroxybenzophenone, the pre-product and N,N-dimethylformamide evenly, react at 80 - 100 °C for 3 h under nitrogen protection, cool to room temperature, filter, wash and dry to obtain the modified anti-aging agent.

2. The heat and light resistant aging photovoltaic cable according to claim 1, characterized in that, The conductor core is a copper conductor core.

3. A light and heat aging resistant photovoltaic cable according to claim 1, wherein, In step A1, the dosage ratio of 1,3-dimethyl-6-carbamoylpyrimidine, acetic acid aqueous solution and formaldehyde is 0.02 - 0.04 mol: 30 mL: 0.01 - 0.02 mol, and the volume ratio of acetic acid to deionized water in the acetic acid aqueous solution is 1:

9.

4. A light and heat aging resistant photovoltaic cable according to claim 1, characterized in that, In step A2, the dosage ratio of maleic anhydride, the compound and tetrahydrofuran is 0.02 - 0.04 mol: 0.01 - 0.02 mol: 10 - 20 mL.

5. A light and heat aging resistant photovoltaic cable according to claim 1, characterized in that, In step A3, the dosage ratio of 2,4-dihydroxybenzophenone, the pre-product and N,N-dimethylformamide is 0.1 - 0.2 mol: 0.1 - 0.2 mol: 10 - 20 mL.

6. A light and heat resistant aging photovoltaic cable according to claim 1, characterized in that, The modified flame retardant is prepared by the following method: Step B1: Mix m-chloroaniline and ethanol evenly at 80 °C, then add benzaldehyde and mix evenly, react at 80 °C for 8 h, cool to room temperature, filter, wash, and dry in vacuum for 24 h to obtain intermediate 1; Step B2: Mix intermediate 1, phenylboronic acid and N,N-dimethylformamide, react at 50 - 100 °C for 5 - 10 h, after cooling to room temperature, filter, wash and dry to obtain intermediate 2; Step B3: Mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ethanol evenly at 80 °C, slowly add intermediate 2 under magnetic stirring, react for 8 h, filter, wash, and dry in vacuum for 24 h to obtain the modified flame retardant.

7. A light and heat aging resistant photovoltaic cable according to claim 6, characterized in that, In step B1, the dosage ratio of m-chloroaniline, ethanol and benzaldehyde is 0.01 - 0.02 mol: 300 mL: 0.01 - 0.02 mol.

8. The heat- and light-resistant aging photovoltaic cable according to claim 6, wherein, In step B2, the dosage ratio of intermediate 1, phenylboronic acid and N,N-dimethylformamide is 0.1 - 0.2 mol: 0.05 - 0.1 mol: 150 - 300 mL.

9. The light and heat aging resistant photovoltaic cable according to claim 6, characterized in that, In step B3, the dosage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, ethanol, and intermediate 2 is 0.02 - 0.04 mol : 300 mL : 0.01 - 0.02 mol.

10. A method for preparing a light and heat resistant aging photovoltaic cable according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Weigh the raw materials by weight parts. Mix polyvinyl chloride resin, modified anti-aging agent, modified flame retardant, dioctyl phthalate, nano-silica, butyl stearate, and zinc stearate, and mix them at a high speed of 2000 rpm for 5 minutes, then extrude, cool, and pelletize to obtain the outer sheath. S2. Extrude polyethylene on the surface of the conductor core to form an insulating layer, use polypropylene to fill on the surface of the insulating layer to form a filling layer, and extrude the outer sheath on the surface of the filling layer, then cool and solidify to obtain the light and heat aging resistant photovoltaic cable.

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