Corrosion-resistant power cable and method of making the same

Abstract

The application discloses a kind of corrosion-resistant power cable and preparation method thereof, the cable includes a plurality of conductors arranged from inside to outside in sequence, the surface of conductor is covered with insulating layer, the outer portion of insulating layer is provided with wrapping inner liner, filling material is filled between wrapping inner liner and insulating layer, wrapping inner liner is covered with protective layer outside, the outer portion of protective layer is covered with sheath;Sheath is prepared by reinforced resin, reinforced resin is prepared by blending extrusion of modified resin and modified filler, the molecule of modified resin contains ortho-hydroxy benzimidazole structure, the hydrogen bond chelation ring in its molecule can be reversibly transformed into isomer, convert light energy into heat energy, and further enhance the ultraviolet resistance effect of reinforced resin, the molecular chain contains organosilicon segment, which can further enhance the corrosion resistance of reinforced resin, when the sheath is corroded, zinc organic framework on the surface of modified filler will generate zinc oxide, and zinc oxide can isolate the contact of corrosive substances with the sheath.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power cable preparation, in particular to a corrosion-resistant power cable and a preparation method thereof. BACKGROUND

[0002] Power cable is a cable for transmitting and distributing electric energy. Power cable is often used in urban underground power grid, power station outgoing line, internal power supply of industrial and mining enterprises and underwater power transmission line across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cable is a cable product used to transmit and distribute high-power electric energy in the main line of the power system. Since power cables are widely laid, they are more susceptible to corrosion when laid in some humid areas or acidic or alkaline environments. During the laying of power cables, effective fixation is required to ensure the stability of the power cables. Traditional power cables are prone to interaction with external corrosion due to excessive load pressure in the pressure fixation area, which not only greatly affects the function of the cable but also shortens the service life of the cable. SUMMARY

[0003] The present application relates to the technical field of power cable preparation, in particular to a corrosion-resistant power cable and a preparation method thereof.

[0004] The object of the present application can be achieved by the following technical solutions:

[0005] A corrosion-resistant power cable comprises a plurality of conductors arranged in sequence from the inside to the outside, the surface of the conductors is covered with an insulation layer, the outside of the insulation layer is provided with a wrapping inner liner layer, the wrapping inner liner layer is filled with a filler between the insulation layer, the outside of the wrapping inner liner layer is covered with a protective layer, and the outside of the protective layer is covered with a sheath.

[0006] The wrapping inner liner layer is mica tape, the filler is glass fiber rope, the insulation layer and the protective layer are both polyvinyl chloride, and the sheath is prepared from reinforced resin.

[0007] Further, the reinforced resin is prepared by the following steps:

[0008] Step A1: mix concentrated hydrochloric acid and p-chloro-o-nitroaniline, stir for 30-40 min at a rotation speed of 60-80 r / min and a temperature of 0-2 DEG C, then add sodium nitrite aqueous solution, and react for 1-1.5 h to prepare diazonium liquid, mix biphenyl diphenol, sodium hydroxide, sodium carbonate and DMF uniformly, stir at a rotation speed of 120-150 r / min and a temperature of 0-2 DEG C, then add the diazonium liquid, and react for 3-5 h to prepare azo dye;

[0009] Step A2: the azo dye, ethanol and sodium hydroxide solution were mixed uniformly, stirring at a speed of 300-500 r / min and a temperature of 78-80℃, and then sodium dithionite was added, and the reaction was carried out for 1-1.5 h, then the pH value was adjusted to 4 to obtain intermediate 1;

[0010] Step A3: 1,1,3,3-tetramethyldisiloxane, p-hydroxystyrene and DMF were mixed uniformly, stirring at a speed of 150-200 r / min and a temperature of 50-60℃, and then chloroplatinic acid was added, and the reaction was carried out for 10-15 h to obtain intermediate 2, intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone, potassium carbonate and DMSO were mixed uniformly, and the reaction was carried out at a speed of 60-80 r / min and a temperature of 180-185℃ for 8-10 h to obtain a modified resin, and the modified resin and the modified filler were blended and extruded to obtain a reinforced resin.

[0011] Further, the amount ratio of the concentrated hydrochloric acid, p-chloro-o-nitroaniline and sodium nitrite aqueous solution in step A1 is 75 mL:0.2 mol:40 mL, the mass fraction of the concentrated hydrochloric acid is 36%, the concentration of the sodium nitrite aqueous solution is 7.5 mol / L, and the amount ratio of the diphenylol, sodium hydroxide, sodium carbonate and diazonium solution is 0.1 mol:0.1 mol:0.3 mol:55 mL.

[0012] Further, the amount ratio of the azo dye, ethanol, sodium hydroxide solution and sodium dithionite in step A2 is 20 mmol:50 mL:50 mL:80 mmol, and the mass fraction of the sodium hydroxide solution is 18%.

[0013] Further, the molar ratio of 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene in step A3 is 1:2, the amount of chloroplatinic acid is 1‰ of p-hydroxystyrene, and the molar ratio of intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone and potassium carbonate is 10:10:20:20.6:33, and the mass ratio of the modified resin and the modified filler is 5:1.

[0014] Further, the modified filler is prepared by the following steps:

[0015] Step B1: basalt fibers, cetyltrimethylammonium chloride and deionized water were mixed uniformly, and then ultrasonic treatment was carried out at a frequency of 20-30 kHz for 30-40 min, and then the filtrate was removed by filtration, and the substrate was dispersed in deionized water, and then magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea were added, and the temperature was raised to 120-130℃, and the reaction was carried out for 20-25 h to obtain modified basalt fibers;

[0016] Step B2: mixing tetraethyl orthosilicate, deionized water and isopropyl alcohol uniformly, stirring at a speed of 120-150 r / min and a temperature of 55-60℃, adding formic acid to pH 3.5, reacting for 7-9 h, adding modified basalt fiber, stirring for 1-1.5 h, heating to 500-550℃, and keeping for 2-3 h to obtain a composite matrix;

[0017] Step B3: dispersing the composite matrix in ethanol, adding KH560 and deionized water, stirring at a speed of 150-200 r / min and a temperature of 50-60℃ for 1-1.5 h, adding 2-aminobenzimidazole, adjusting pH to 10-11, stirring for 2-3 h to obtain a precursor, dispersing the precursor in DMF, adding zinc chloride, reacting at a speed of 60-80 r / min and a temperature of 80-85℃ for 70-75 h to obtain a modified filler.

[0018] Further, the use amount ratio of basalt fiber, cetyltrimethylammonium chloride, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea in step B1 is 50 g:7 g:1 L:5 mol:2.5 mol:7.5 mol.

[0019] Further, the use amount ratio of tetraethyl orthosilicate, deionized water, isopropyl alcohol and modified basalt fiber in step B2 is 3 g:15 mL:40 mL:10 g.

[0020] Further, the use amount of KH560 in step B3 is 2% of the mass of the composite matrix, the molar ratio of KH560 and 2-aminobenzimidazole is 1:1, and the mass ratio of the precursor and zinc chloride is 1:3.

[0021] The beneficial effects of the present application: a kind of corrosion-resistant power cable, including a plurality of conductors arranged in sequence from inside to outside, the surface of conductor is covered with insulating layer, insulating layer is equipped with wrapping inner liner outside, wrapping inner liner is filled with filler between insulating layer, wrapping inner liner is covered with protective layer outside, protective layer is covered with sheath outside, sheath is made of reinforced resin, reinforced resin is made by modified resin and modified filler blend extrusion, modified resin is treated by diazotization with p-chloro-o-nitroaniline as raw material, diazotization liquid is prepared, diazotization liquid is reacted with biphenyl diol to form azo dye, azo dye is reduced to form intermediate 1 containing benzotriazole structure, 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene are reacted under the action of chloroplatinic acid, so that Si-H on 1,1,3,3-tetramethyldisiloxane reacts with double bond on p-hydroxystyrene, intermediate 2 is prepared, intermediate 1, intermediate 2, methylhydroquinone and 4,4-difluorobenzophenone are polymerized to form polyether ether ketone, and modified resin is prepared, the modified resin contains o-hydroxybenzimidazole structure on the molecule, the intramolecular hydrogen bond chelation ring can be reversibly transformed, the light energy is converted into heat energy, and the ultraviolet resistance of the reinforced resin is further enhanced, the molecular chain contains organosilicon segment, and the corrosion resistance of the reinforced resin is further enhanced, modified filler is made of basalt fiber, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate as raw material, and the structure of hydrotalcite is loaded on basalt fiber, modified basalt fiber is prepared, and the surface of modified basalt fiber is further treated with tetraethyl orthosilicate to coat nano silicon dioxide, a composite matrix is prepared, the composite matrix is treated with KH560 to graft epoxy group on the surface, and then reacted with 2-aminobenzimidazole to prepare a precursor, the precursor is reacted with zinc chloride to form metal organic framework by coordinating imidazole group on the precursor with zinc ion, and the modified filler is prepared, when the sheath is corroded, zinc organic framework on the surface of the modified filler will generate zinc oxide, and the oxidizing property can isolate the corrosion material from contacting the sheath, meanwhile, the modified filler contains double electric layer structure, which can repel anions and cations of corrosion, so that the corrosion resistance of the sheath is further improved. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0023] Embodiment 1

[0024] A kind of corrosion-resistant power cable, including a plurality of conductors arranged in sequence from inside to outside, the surface of conductor is covered with insulating layer, insulating layer is equipped with wrapping inner liner outside, wrapping inner liner is filled with filler between insulating layer, wrapping inner liner is covered with protective layer outside, protective layer is covered with sheath outside,

[0025] The wrapping inner layer is mica tape, the filler is glass fiber rope, the insulation layer and the protective layer are both polyvinyl chloride, the polyvinyl chloride is SG-1, and the sheath is reinforced resin.

[0026] The modified resin is prepared by the following steps:

[0027] Step A1: mixing concentrated hydrochloric acid and p-chloro-o-nitroaniline, stirring at a rotation speed of 60 r / min and a temperature of 0℃ for 30 min, then adding aqueous sodium nitrite solution and reacting for 1 h to prepare diazonium liquid, uniformly mixing biphenol, sodium hydroxide, sodium carbonate and DMF, stirring at a rotation speed of 120 r / min and a temperature of 0℃, and adding the diazonium liquid and reacting for 3 h to prepare azo dye;

[0028] Step A2: uniformly mixing azo dye, ethanol and sodium hydroxide solution, stirring at a rotation speed of 300 r / min and a temperature of 78℃, adding sodium hydrosulfite, reacting for 1 h, and adjusting the pH value to 4 to prepare intermediate 1;

[0029] Step A3: uniformly mixing 1,1,3,3-tetramethyldisiloxane, p-hydroxystyrene and DMF, stirring at a rotation speed of 150 r / min and a temperature of 50℃, adding chloroplatinic acid, and reacting for 10 h to prepare intermediate 2, uniformly mixing intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone, potassium carbonate and DMSO, and reacting at a rotation speed of 60 r / min and a temperature of 180℃ for 8 h to prepare modified resin, and blending and extruding the modified resin and modified filler to prepare reinforced resin.

[0030] The amount ratio of the concentrated hydrochloric acid, p-chloro-o-nitroaniline and aqueous sodium nitrite solution in step A1 is 75 mL:0.2 mol:40 mL, the mass fraction of the concentrated hydrochloric acid is 36%, the concentration of the aqueous sodium nitrite solution is 7.5 mol / L, and the amount ratio of biphenol, sodium hydroxide, sodium carbonate and diazonium liquid is 0.1 mol:0.1 mol:0.3 mol:55 mL.

[0031] The amount ratio of the azo dye, ethanol, sodium hydroxide solution and sodium hydrosulfite in step A2 is 20 mmol:50 mL:50 mL:80 mmol, and the mass fraction of the sodium hydroxide solution is 18%.

[0032] The molar ratio of 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene in step A3 is 1:2, the amount of chloroplatinic acid is 1 ‰ of p-hydroxystyrene, and the molar ratio of intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone and potassium carbonate is 10:10:20:20.6:33. The mass ratio of modified resin and modified filler is 5:1.

[0033] The modified filler is prepared by the following steps:

[0034] Step B1: basalt fibers, cetyltrimethylammonium chloride and deionized water are uniformly mixed, ultrasonic treatment is carried out under the condition of a frequency of 20 kHz for 30 min, then the filtrate is removed by filtration, the substrate is dispersed in deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are added, the temperature is raised to 120℃, and reaction is carried out for 20 h to prepare modified basalt fibers;

[0035] Step B2: tetraethyl orthosilicate, deionized water and isopropanol are uniformly mixed, stirring is carried out under the condition of a rotation speed of 120 r / min and a temperature of 55℃, formic acid is added until the pH value is 3.5, reaction is carried out for 7 h, then the modified basalt fibers are added, stirring is carried out for 1 h, the temperature is raised to 500℃, and incubation is carried out for 2 h to prepare a composite matrix;

[0036] Step B3: the composite matrix is dispersed in ethanol, KH560 and deionized water are added, stirring is carried out under the condition of a rotation speed of 150 r / min and a temperature of 50℃ for 1 h, then 2-aminobenzimidazole is added, the pH value is adjusted to 10, and stirring is carried out for 2 h to prepare a precursor, the precursor is dispersed in DMF, zinc chloride is added, reaction is carried out under the condition of a rotation speed of 60 r / min and a temperature of 80℃ for 70 h to prepare a modified filler.

[0037] The amount ratio of basalt fibers, cetyltrimethylammonium chloride, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea in step B1 is 50 g:7 g:1 L:5 mol:2.5 mol:7.5 mol.

[0038] The amount ratio of tetraethyl orthosilicate, deionized water, isopropanol and modified basalt fibers in step B2 is 3 g:15 mL:40 mL:10 g.

[0039] The amount of KH560 in step B3 is 2% of the mass of the composite matrix, the molar ratio of KH560 and 2-aminobenzimidazole is 1:1, and the mass ratio of the precursor and zinc chloride is 1:3.

[0040] Example 2

[0041] The application discloses a kind of corrosion-resistant power cable, including sequentially arranged several conductors from inside to outside, the surface of conductor is covered with insulating layer, insulating layer is equipped with wrapping inner liner outside, filling is filled between wrapping inner liner and insulating layer, wrapping inner liner is covered with protective layer outside, protective layer is covered with sheath outside;

[0042] The wrapping inner liner is mica tape, the filling is glass fiber rope, the insulating layer and the protective layer are both polyvinyl chloride, the polyvinyl chloride is SG-1, and the sheath is made of reinforced resin.

[0043] The modified resin is made by the following steps:

[0044] Step A1: mix concentrated hydrochloric acid and p-chloro-o-nitroaniline, stir for 35 min at a rotation speed of 60 r / min and a temperature of 1 DEG C, then add aqueous sodium nitrite solution, and react for 1.5 h to obtain diazonium liquid; mix biphenyl diol, sodium hydroxide, sodium carbonate and DMF uniformly, stir at a rotation speed of 120 r / min and a temperature of 2 DEG C, then add the diazonium liquid, and react for 4 h to obtain azo dye;

[0045] Step A2: mix the azo dye, ethanol and sodium hydroxide solution uniformly, stir at a rotation speed of 300 r / min and a temperature of 78 DEG C, then add sodium hydrosulfite, react for 1.5 h, adjust the pH value to 4, and obtain intermediate 1;

[0046] Step A3: mix 1,1,3,3-tetramethyldisiloxane, p-hydroxystyrene and DMF uniformly, stir at a rotation speed of 150 r / min and a temperature of 55 DEG C, then add chloroplatinic acid, and react for 15 h to obtain intermediate 2; mix intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone, potassium carbonate and DMSO uniformly, react at a rotation speed of 60 r / min and a temperature of 185 DEG C for 9 h to obtain the modified resin; and blend and extrude the modified resin and modified filler to obtain the reinforced resin.

[0047] The amount ratio of the concentrated hydrochloric acid, p-chloro-o-nitroaniline and aqueous sodium nitrite solution in step A1 is 75 mL:0.2 mol:40 mL; the mass fraction of the concentrated hydrochloric acid is 36%; the concentration of the aqueous sodium nitrite solution is 7.5 mol / L; and the amount ratio of the biphenyl diol, sodium hydroxide, sodium carbonate and diazonium liquid is 0.1 mol:0.1 mol:0.3 mol:55 mL.

[0048] The amount ratio of the azo dye, ethanol, sodium hydroxide solution and sodium hydrosulfite in step A2 is 20 mmol:50 mL:50 mL:80 mmol; and the mass fraction of the sodium hydroxide solution is 18%.

[0049] The molar ratio of 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene in step A3 is 1:2, the amount of chloroplatinic acid is 1 ‰ of p-hydroxystyrene, and the molar ratio of intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone and potassium carbonate is 10:10:20:20.6:33. The mass ratio of modified resin and modified filler is 5:1.

[0050] The modified filler is prepared by the following steps:

[0051] Step B1: basalt fibers, cetyltrimethylammonium chloride and deionized water are uniformly mixed, ultrasonic treatment is carried out at a frequency of 25 kHz for 35 min, then the filtrate is removed by filtration, the substrate is dispersed in deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are added, the temperature is raised to 125℃, and the reaction is carried out for 25 h to obtain modified basalt fibers;

[0052] Step B2: tetraethyl orthosilicate, deionized water and isopropanol are uniformly mixed, stirring is carried out at a speed of 120 r / min and a temperature of 58℃, formic acid is added to a pH value of 3.5, the reaction is carried out for 89 h, then the modified basalt fibers are added, stirring is carried out for 1.5 h, the temperature is raised to 530℃, and the temperature is maintained for 2.5 h to obtain a composite matrix;

[0053] Step B3: the composite matrix is dispersed in ethanol, KH560 and deionized water are added, stirring is carried out at a speed of 150 r / min and a temperature of 55℃ for 1.5 h, then 2-aminobenzimidazole is added, the pH value is adjusted to 10, and stirring is carried out for 3 h to obtain a precursor, the precursor is dispersed in DMF, zinc chloride is added, the reaction is carried out at a speed of 60 r / min and a temperature of 85℃ for 75 h to obtain a modified filler.

[0054] The amount ratio of basalt fibers, cetyltrimethylammonium chloride, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea in step B1 is 50 g:7 g:1 L:5 mol:2.5 mol:7.5 mol.

[0055] The amount ratio of tetraethyl orthosilicate, deionized water, isopropanol and modified basalt fibers in step B2 is 3 g:15 mL:40 mL:10 g.

[0056] The amount of KH560 in step B3 is 2% of the mass of the composite matrix, the molar ratio of KH560 and 2-aminobenzimidazole is 1:1, and the mass ratio of the precursor and zinc chloride is 1:3.

[0057] Example 3

[0058] The application discloses a kind of corrosion-resistant power cable, including sequentially arranged several conductors from inside to outside, the surface of conductor is covered with insulating layer, insulating layer is equipped with wrapping inner liner outside, filling is filled between wrapping inner liner and insulating layer, wrapping inner liner is covered with protective layer outside, protective layer is covered with sheath outside;

[0059] The wrapping inner liner is mica tape, the filling is glass fiber rope, the insulating layer and the protective layer are both polyvinyl chloride, the polyvinyl chloride is SG-1, and the sheath is made of reinforced resin.

[0060] The modified resin is prepared by the following steps:

[0061] Step A1: mix concentrated hydrochloric acid and p-chloro-o-nitroaniline, stir for 40 min at a rotation speed of 80 r / min and a temperature of 2 DEG C, then add aqueous sodium nitrite solution, and react for 1.5 h to prepare diazonium liquid; mix biphenyl diphenol, sodium hydroxide, sodium carbonate and DMF uniformly, stir at a rotation speed of 150 r / min and a temperature of 2 DEG C, then add the diazonium liquid, and react for 5 h to prepare azo dye;

[0062] Step A2: mix the azo dye, ethanol and sodium hydroxide solution uniformly, stir at a rotation speed of 500 r / min and a temperature of 80 DEG C, then add sodium hydrosulfite, react for 1.5 h, adjust the pH value to 4, and prepare intermediate 1;

[0063] Step A3: mix 1,1,3,3-tetramethyldisiloxane, p-hydroxystyrene and DMF uniformly, stir at a rotation speed of 200 r / min and a temperature of 60 DEG C, then add chloroplatinic acid, and react for 15 h to prepare intermediate 2; mix intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone, potassium carbonate and DMSO uniformly, react at a rotation speed of 80 r / min and a temperature of 185 DEG C for 10 h to prepare the modified resin; and blend and extrude the modified resin and modified filler to prepare the reinforced resin.

[0064] The amount ratio of the concentrated hydrochloric acid, p-chloro-o-nitroaniline and aqueous sodium nitrite solution in step A1 is 75 mL:0.2 mol:40 mL; the mass fraction of the concentrated hydrochloric acid is 36%; the concentration of the aqueous sodium nitrite solution is 7.5 mol / L; and the amount ratio of the biphenyl diphenol, sodium hydroxide, sodium carbonate and diazonium liquid is 0.1 mol:0.1 mol:0.3 mol:55 mL.

[0065] The amount ratio of the azo dye, ethanol, sodium hydroxide solution and sodium hydrosulfite in step A2 is 20 mmol:50 mL:50 mL:80 mmol; and the mass fraction of the sodium hydroxide solution is 18%.

[0066] The molar ratio of 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene in step A3 is 1:2, the amount of chloroplatinic acid is 1 ‰ of p-hydroxystyrene, and the molar ratio of intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone and potassium carbonate is 10:10:20:20.6:33. The mass ratio of modified resin and modified filler is 5:1.

[0067] The modified filler is prepared by the following steps:

[0068] Step B1: basalt fibers, cetyltrimethylammonium chloride and deionized water are mixed uniformly, after ultrasonic treatment for 40 min under the condition of a frequency of 30 kHz, the filtrate is removed by filtration, the substrate is dispersed in deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are added, the temperature is raised to 130℃, and the reaction is carried out for 20-25 h to prepare modified basalt fibers;

[0069] Step B2: tetraethyl orthosilicate, deionized water and isopropanol are mixed uniformly, under the condition of a stirring speed of 150 r / min and a temperature of 60℃, formic acid is added to a pH value of 3.5, the reaction is carried out for 9 h, then the modified basalt fibers are added, stirring is carried out for 1.5 h, the temperature is raised to 550℃, and the temperature is kept for 3 h to prepare a composite matrix;

[0070] Step B3: the composite matrix is dispersed in ethanol, KH560 and deionized water are added, stirring is carried out for 1.5 h under the condition of a stirring speed of 200 r / min and a temperature of 60℃, then 2-aminobenzimidazole is added, the pH value is adjusted to 11, and stirring is carried out for 3 h to prepare a precursor, the precursor is dispersed in DMF, zinc chloride is added, the reaction is carried out for 75 h under the condition of a stirring speed of 80 r / min and a temperature of 85℃ to prepare a modified filler.

[0071] The amount ratio of basalt fibers, cetyltrimethylammonium chloride, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea in step B1 is 50 g:7 g:1 L:5 mol:2.5 mol:7.5 mol.

[0072] The amount ratio of tetraethyl orthosilicate, deionized water, isopropanol and modified basalt fibers in step B2 is 3 g:15 mL:40 mL:10 g.

[0073] The amount of KH560 in step B3 is 2% of the mass of the composite matrix, the molar ratio of KH560 and 2-aminobenzimidazole is 1:1, and the mass ratio of the precursor and zinc chloride is 1:3.

[0074] Comparative Example 1

[0075] This comparative example does not add intermediate 1 compared with Example 1, and the other steps are the same.

[0076] Comparative Example 2

[0077] The comparative example is the same as example 1 except that intermediate 2 is not added.

[0078] Comparative Example 3

[0079] The comparative example is the same as example 1 except that the modified filler is replaced by basalt fiber.

[0080] Comparative Example 4

[0081] The comparative example is the same as example 1 except that the modified basalt fiber is replaced by basalt fiber.

[0082] Comparative Example 5

[0083] The comparative example is the same as example 1 except that the modified filler is replaced by composite matrix.

[0084] The reinforced resins prepared in examples 1-3 and comparative examples 1-5 are made into test samples II according to the standard of GB / T1040-92, the tensile rate is 50mm / min, the tensile strength is detected, then the test samples are respectively immersed in a 20% mass fraction hydrochloric acid solution, a 20% mass fraction sodium hydroxide solution and a 20% mass fraction sodium chloride solution, and immersed for 30 days, according to the standard of GB / T16422.3-2022, the ultraviolet wavelength is 340nm, the intensity is 0.76W / m, the exposure mode 1 is adopted, the composite material test sample is irradiated and exposed at 60℃ for 4h, and then condensed and exposed at 50℃ without irradiation for 4h alternately, the ultraviolet aging experiment is carried out, the total aging exposure time is 500h, the tensile strength change rate is calculated, and the results are shown in the following table.

[0085]

[0086] From the above table, it can be seen that the application has good corrosion resistance.

[0087] The above content is only an example and description of the concept of the application, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific examples, as long as they do not deviate from the concept of the application or exceed the scope defined by the present claims, and should belong to the protection scope of the application.

Claims

1. A corrosion-resistant power cable, characterized in that: It includes several conductors arranged sequentially from the inside to the outside, the surface of the conductors is covered with an insulating layer, an inner lining layer is provided outside the insulating layer, a filler is filled between the inner lining layer and the insulating layer, a protective layer is covered outside the inner lining layer, and a sheath is covered outside the protective layer. The inner lining of the wrapping is mica tape, the filler is fiberglass rope, the insulation layer and the protective layer are both polyvinyl chloride, and the sheath is made of reinforced resin; The reinforcing resin is prepared by the following steps: Step A1: After mixing and stirring concentrated hydrochloric acid and p-chloro-o-nitroaniline, add sodium nitrite aqueous solution to react and obtain diazo solution. Mix and stir biphenyl, sodium hydroxide, sodium carbonate and DMF and add diazo solution to react and obtain azo dye. Step A2: Mix and stir the azo dye, ethanol and sodium hydroxide solution, add sodium dithionite, and after the reaction, adjust the pH to acidity to obtain intermediate 1; Step A3: Mix 1,1,3,3-tetramethyldisiloxane, p-hydroxystyrene and DMF and add chloroplatinic acid to react and obtain intermediate 2. Mix intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone, potassium carbonate and DMSO to react and obtain modified resin. Co-extrude the modified resin and modified filler to obtain reinforced resin. The ratio of concentrated hydrochloric acid, p-chloro-o-nitroaniline, and sodium nitrite aqueous solution used in step A1 is 75 mL: 0.2 mol: 40 mL, and the ratio of biphenyl hydrochloride, sodium hydroxide, sodium carbonate, and diazonium solution used is 0.1 mol: 0.1 mol: 0.3 mol: 55 mL. The ratio of azo dye, ethanol, sodium hydroxide solution and sodium dithionite used in step A2 is 20 mmol: 50 mL: 50 mL: 80 mmol. The molar ratio of 1,1,3,3-tetramethyldisiloxane and p-hydroxystyrene in step A3 is 1:2, the molar ratio of intermediate 1, intermediate 2, methylhydroquinone, 4,4-difluorobenzophenone and potassium carbonate is 10:10:20:20.6:33, and the mass ratio of modified resin and modified filler is 5:

1. The modified filler is prepared by the following steps: Step B1: Basalt fiber, hexadecyltrimethylammonium chloride and deionized water are mixed and ultrasonically treated, the filtrate is filtered to remove the filtrate, the substrate is dispersed in deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are added, and the mixture is heated to react to obtain modified basalt fiber. Step B2: Mix tetraethyl orthosilicate, deionized water and isopropanol, add formic acid, react, add modified basalt fiber, stir, heat and keep warm to obtain composite matrix; Step B3: Disperse the composite matrix in ethanol, add KH560 and deionized water, stir and treat, add 2-aminobenzimidazole, continue stirring to obtain the precursor, disperse the precursor in DMF, add zinc chloride, and react to obtain the modified filler.

2. The corrosion-resistant power cable according to claim 1, characterized in that: The ratio of basalt fiber, hexadecyltrimethylammonium chloride, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate, and urea in step B1 is 50g:7g:1L:5mol:2.5mol:7.5mol.

3. The corrosion-resistant power cable according to claim 1, characterized in that: The ratio of tetraethyl orthosilicate, deionized water, isopropanol and modified basalt fiber used in step B2 is 3g:15mL:40mL:10g.

4. The corrosion-resistant power cable according to claim 1, characterized in that: The amount of KH560 used in step B3 is 2% of the mass of the composite organism, the molar ratio of KH560 to 2-aminobenzimidazole is 1:1, and the mass ratio of the precursor to zinc chloride is 1:

3.

5. The method for preparing a corrosion-resistant power cable according to claim 1, characterized in that: Specifically, the steps include: coating the conductor surface with polyvinyl chloride to form an insulating layer, providing a wrapping inner liner outside the insulating layer, filling the space between the wrapping inner liner and the insulating layer with filler, covering the wrapping inner liner with a protective layer, and finally wrapping the protective layer with reinforcing resin to form a sheath.

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