CN111777830A - Environment-friendly rat-proof and termite-proof plastic insulated power cable - Google Patents

Environment-friendly rat-proof and termite-proof plastic insulated power cable Download PDF

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CN111777830A
CN111777830A CN202010781901.4A CN202010781901A CN111777830A CN 111777830 A CN111777830 A CN 111777830A CN 202010781901 A CN202010781901 A CN 202010781901A CN 111777830 A CN111777830 A CN 111777830A
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李坤
居盛文
吴云
方伟
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Abstract

The invention discloses an environment-friendly rat-proof and termite-proof plastic insulated power cable which comprises the following raw materials in parts by weight: 100-120 parts of PVC resin, 5-10 parts of oxidation-resistant filler, 5-10 parts of reinforcing filler, 3-5 parts of flame retardant and 1-3 parts of lubricant; an oxidation-resistant filler and a reinforcing filler are prepared in the preparation process, the oxidation-resistant filler can capture free radicals formed in the oxidation process of a polymer, the free radicals can not generate chain reaction with destructive effect, hydroperoxide can be decomposed, stable inactive products can be generated and are mixed with a rubber matrix, the oxidation-resistant filler can be uniformly distributed in the matrix, the ageing resistance of the cable can not be reduced after the cable is used for a long time, the service life of the cable is prolonged, and when the reinforcing filler is mixed with the rubber matrix, active groups on the surface of glass fibers enable the reinforcing filler to be uniformly dispersed in the rubber matrix, so that the impact resistance of the cable is greatly improved.

Description

Environment-friendly rat-proof and termite-proof plastic insulated power cable
Technical Field
The invention belongs to the technical field of cable preparation, and particularly relates to an environment-friendly rat-proof and termite-proof plastic insulated power cable.
Background
The power cable is an important power transmission carrier, and with the pace of urban power grid transformation acceleration, the number of laid power cables in urban power grids is increased, and particularly in central urban areas, the ratio of cables used by power transmission lines is continuously increased. Compared with an overhead line, the underground cable has the advantages of reliable operation, no occupation of ground area and no influence on the appearance although the investment cost is higher, and only the underground cable is laid in part of places due to corrosive, flammable or explosive objects. Therefore, in densely populated cities, the adoption of cable power supply is a current and future development trend.
The existing power cable is usually buried underground in the using process, the cable skin can be oxidized after long-time use, the cable skin is aged and damaged, the short circuit phenomenon is caused, the skin can be damaged when a long-time heavy object is extruded and is gnawed by rats and ants, and the normal work of the cable cannot be protected.
Disclosure of Invention
The invention aims to provide an environment-friendly rat-proof and termite-proof plastic insulated power cable.
The technical problems to be solved by the invention are as follows:
the existing power cable is usually buried underground in the using process, the cable skin can be oxidized after long-time use, the cable skin is aged and damaged, the short circuit phenomenon is caused, the skin can be damaged when a long-time heavy object is extruded and is gnawed by rats and ants, and the normal work of the cable cannot be protected.
The purpose of the invention can be realized by the following technical scheme:
an environment-friendly rat-proof and termite-proof plastic insulated power cable comprises the following raw materials in parts by weight: 100-120 parts of PVC resin, 5-10 parts of oxidation-resistant filler, 5-10 parts of reinforcing filler, 3-5 parts of flame retardant and 1-3 parts of lubricant;
the insulated power cable is manufactured by the following steps:
step S1: heating PVC resin at the temperature of 140-145 ℃ until PVC plastics are completely melted, adding an oxidation-resistant filler and a reinforcing filler, mixing for 10-15min, adding a flame retardant and a lubricant, and continuously mixing for 15-20min to obtain a rubber material;
step S2: tabletting the rubber material at the temperature of 140 ℃ and 145 ℃ to obtain rubber sheets with the thickness of 3-5mm, granulating to obtain rubber particles, adding the rubber particles into five sections of single screws, and extruding under the conditions that the temperature of the five sections is 130 ℃, 140 ℃, 155 ℃, 140 ℃ and 135 ℃ respectively to obtain the rubber sheath;
step S3: and (5) coating the rubber sheath prepared in the step S2 on the surface of the copper wire to prepare the insulated power cable.
Further, the flame retardant is one or more of tributyl phosphate, tri (2-ethylhexyl) phosphate and tri (2-chloroethyl) phosphate which are mixed in any proportion, and the lubricant is one or more of stearic acid, butyl stearate and oleamide which are mixed in any proportion.
Further, the oxidation-resistant filler is prepared by the following steps:
step A1: adding phenol and dichloromethane into a reaction kettle, stirring until the phenol is completely dissolved under the conditions of the rotation speed of 200-300r/min and the temperature of 25-30 ℃, sequentially adding acetic anhydride and triethylamine, reacting for 2-3h to obtain an intermediate 1, adding the intermediate 1 and a nitric acid solution into the reaction kettle, and reacting for 1-1.5h under the conditions of the rotation speed of 100-120r/min and the temperature of 60-65 ℃ to obtain an intermediate 2;
the reaction process is as follows:
Figure BDA0002620558050000031
step A2: adding the intermediate 2 prepared in the step A1 into a reaction kettle, introducing isobutene to react for 4-6h at the temperature of 120-125 ℃ and the pressure of 0.6-0.8MPa, and then preserving heat for 1-2h at the pressure of 0.1-0.15MPa and the temperature of 45-50 ℃ to prepare an intermediate 3;
the reaction process is as follows:
Figure BDA0002620558050000032
step A3: adding the intermediate 3 prepared in the step A2 and deionized water into a reaction kettle, stirring at the rotation speed of 200-300r/min until the mixture is uniformly mixed, adding a sulfuric acid solution and sodium dodecyl sulfate, introducing nitrogen, heating at the temperature of 70-75 ℃, dropwise adding a formaldehyde water solution to react for 2-3h to prepare an intermediate 4, adding the intermediate 4, iron powder and a hydrochloric acid solution into the reaction kettle, and reacting for 1-1.5h at the temperature of 30-40 ℃ to prepare an intermediate 5;
the reaction process is as follows:
Figure BDA0002620558050000033
Figure BDA0002620558050000041
step A4: adding the intermediate 5 prepared in the step A3 and dimethylformamide into a reaction kettle, stirring until the intermediates are uniformly mixed, adding sodium hydroxide, reacting for 30-50min at the rotation speed of 100-150r/min and the temperature of 25-30 ℃, and adjusting the pH value to 5-6 to prepare an intermediate 6;
the reaction process is as follows:
Figure BDA0002620558050000042
step A5: adding attapulgite into mixed acid, carrying out ultrasonic treatment for 1-1.5h under the conditions that the temperature is 60-65 ℃ and the frequency is 30-50kHz, then heating to 85-90 ℃, carrying out heat preservation for 2-3h, adding deionized water until the pH value is 7, filtering to remove filtrate, adding dimethyl sulfoxide into a filter cake to disperse uniformly, adding the intermediate 6 and 1-hydroxybenzotriazole prepared in the step A4, and carrying out ultrasonic treatment for 1-1.5h under the condition that the frequency is 50-80kHz to obtain the oxidation-resistant filler.
Further, the mass ratio of the phenol to the acetic anhydride in the step A1 is 1:1, the mass ratio of the triethylamine to the phenol to the acetic anhydride is 3-5%, the mass ratio of the intermediate 1 to the nitric acid solution is 1:1-1.2, the mass fraction of the nitric acid solution is 55-60%, the mass ratio of the intermediate 2 to the isobutene in the step A2 is 1:1-1.5, the mass ratio of the intermediate 3, the deionized water, the sulfuric acid solution, the sodium dodecyl sulfate and the formaldehyde aqueous solution in the step A3 is 3-4g:50mL:4mL:0.2mL:0.2-0.3g, the mass fraction of the formaldehyde aqueous solution is 20-30%, the mass ratio of the intermediate 4 to the hydrochloric acid solution is 2-3g:5mL, the mass fraction of the hydrochloric acid solution is 10-15%, and the mass fraction of the iron powder is 3-5% of the intermediate 4, the using amount ratio of the intermediate 5 and the sodium hydroxide in the step A4 is 1:1, the mixed acid in the step A5 is a sulfuric acid solution and a nitric acid solution which are mixed according to the volume ratio of 3:1, the mass fraction of the sulfuric acid solution is 70-75%, the mass fraction of the nitric acid solution is 60-70%, the using amount ratio of the filter cake to the intermediate 6 is 5:1-1.5, and the using amount of the 1-hydroxybenzotriazole is 5-8% of the mass sum of the filter cake and the intermediate 6.
Further, the reinforcing filler is prepared by the following steps:
step B1: heating the glass fiber at the temperature of 350-400 ℃ for 10-15s, adding the glass fiber into a modifier, soaking and stirring at the rotation speed of 60-80r/min and the temperature of 80-85 ℃ for 30-40min, filtering to remove filtrate, and drying at the temperature of 120-130 ℃ to obtain the modified glass fiber;
step B2: adding carbon nanotubes into acetone for soaking, performing ultrasonic treatment under the condition of frequency of 30-50kHz, filtering to remove acetone, washing the carbon nanotubes with deionized water for 3-5 times, washing for 20-30s each time, soaking the washed carbon nanotubes in a sodium hydroxide solution, preserving heat for 10-15min at the temperature of 80-90 ℃, filtering to remove the sodium hydroxide solution, washing the carbon fibers until the surface of the carbon fibers is neutral, adding the carbon nanotubes into a nitric acid solution, soaking for 5-10min at the temperature of 50-60 ℃, filtering to remove the nitric acid solution, and drying the carbon nanotubes to obtain modified carbon nanotubes;
step B3: adding ethyl orthosilicate, ethanol and hydrochloric acid solution into a reaction kettle, and stirring for 20-30min at the rotation speed of 300-500r/min and at the temperature of 25-30 ℃ to obtain silica sol;
step B4: adding the modified glass fiber, the modified carbon nanotube and deionized water prepared in the step B1 into a reaction kettle, stirring for 30-40min under the condition of the rotation speed of 800r/min, filtering to remove filtrate, adding the filter cake into the silica sol prepared in the step B3, performing ultrasonic treatment for 1-3h under the condition of the frequency of 10-15MHz, filtering to remove the filtrate, and roasting the filter cake for 3-5h under the condition of the temperature of 500 ℃ and 600 ℃ to prepare the reinforcing filler.
Further, the modifier in the step B1 is mixture of gamma-aminopropyltriethoxysilane with a volume ratio of 1-1.5:5 and ethanol, the dosage of the gamma-aminopropyltriethoxysilane is 0.5-1% of the mass of the glass fiber, the mass fraction of the sodium hydroxide solution in the step B2 is 10-13%, the mass fraction of the nitric acid solution is 30-40%, the dosage volume ratio of the ethyl orthosilicate, the ethanol and the hydrochloric acid solution in the step B3 is 14:2:1.5-2, the mass fraction of the hydrochloric acid solution is 16-18%, and the dosage mass ratio of the modified glass fiber and the modified carbon nanotube in the step B4 is 10: 1-1.5.
The invention has the beneficial effects that: the invention discloses an oxidation-resistant filler prepared in the process of preparing an environment-friendly rat-proof and termite-proof plastic insulated power cable, wherein the oxidation-resistant filler can capture free radicals formed in the oxidation process of a polymer, so that the free radicals can not generate chain reaction with destructive effect, and can decompose hydroperoxide to generate stable inactive products, attapulgite is modified by mixed acid to enable the surface of the attapulgite to contain a large amount of carboxyl, and then the modified attapulgite reacts with an intermediate 6 to enable amino on the intermediate 6 to be condensed with the carboxyl on the attapulgite, so that the intermediate 6 is fixed on the attapulgite and then is mixed with a rubber matrix, so that the oxidation-resistant filler can be uniformly distributed in the matrix, the ageing resistance of the cable can not be reduced after long-time use, and the service life of the cable is prolonged; and a reinforcing filler is prepared, the glass fiber is modified by a modifier to ensure that the surface of the glass fiber contains a large amount of active groups, further, the carbon nanotubes are treated to expand the gully grooves on the surface of the carbon nanotubes, thereby increasing the adsorbability of the carbon nanotubes, the surface also contains a large number of active groups, and then the modified glass fiber is blended and crosslinked, and the ethyl orthosilicate is used as a raw material to prepare silica sol, the silica sol is dispersed with a large amount of nano-silica, the cross-linked product of the modified glass fiber and the modified carbon nano-tube is soaked by the silica sol, so that the nano silicon dioxide fills the gully grooves on the carbon nano tubes, the impact resistance of the reinforcing filler is enhanced, when the glass fiber is blended with a rubber matrix, the active groups on the surface of the glass fiber enable the reinforcing filler to be uniformly dispersed in the rubber matrix, and the impact resistance of the cable is greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An environment-friendly rat-proof and termite-proof plastic insulated power cable comprises the following raw materials in parts by weight: 100 parts of PVC resin, 5 parts of oxidation-resistant filler, 5 parts of reinforcing filler, 3 parts of tributyl phosphate and 1 part of stearic acid;
the insulated power cable is manufactured by the following steps:
step S1: heating PVC resin at 140 ℃ until PVC plastics are completely melted, adding an oxidation-resistant filler and a reinforcing filler, mixing for 10min, adding tributyl phosphate and stearic acid, and continuously mixing for 15min to obtain a rubber material;
step S2: tabletting the rubber material at the temperature of 140 ℃ to obtain rubber sheets with the thickness of 3mm, cutting into particles to obtain rubber particles, adding the rubber particles into five sections of single screws, and extruding at the temperature of 130 ℃, 140 ℃, 155 ℃, 140 ℃ and 135 ℃ to obtain rubber skins;
step S3: and (5) coating the rubber sheath prepared in the step S2 on the surface of the copper wire to prepare the insulated power cable.
The oxidation-resistant filler is prepared by the following steps:
step A1: adding phenol and dichloromethane into a reaction kettle, stirring until the phenol is completely dissolved at the rotation speed of 200r/min and the temperature of 25 ℃, sequentially adding acetic anhydride and triethylamine, reacting for 2 hours to obtain an intermediate 1, adding the intermediate 1 and a nitric acid solution into the reaction kettle, and reacting for 1 hour at the rotation speed of 100r/min and the temperature of 60 ℃ to obtain an intermediate 2;
step A2: adding the intermediate 2 prepared in the step A1 into a reaction kettle, introducing isobutene to react for 4 hours at the temperature of 120 ℃ and the pressure of 0.6MPa, and then preserving heat for 1 hour at the pressure of 0.1MPa and the temperature of 45 ℃ to prepare an intermediate 3;
step A3: adding the intermediate 3 prepared in the step A2 and deionized water into a reaction kettle, stirring at the rotating speed of 200r/min until the mixture is uniformly mixed, adding a sulfuric acid solution and sodium dodecyl sulfate, introducing nitrogen, heating at the temperature of 70 ℃, dropwise adding a formaldehyde water solution to react for 2 hours to prepare an intermediate 4, adding the intermediate 4, iron powder and a hydrochloric acid solution into the reaction kettle, and reacting for 1 hour at the temperature of 30 ℃ to prepare an intermediate 5;
step A4: adding the intermediate 5 prepared in the step A3 and dimethylformamide into a reaction kettle, stirring until the two are uniformly mixed, adding sodium hydroxide, reacting for 30min at the rotation speed of 100r/min and the temperature of 25 ℃, and adjusting the pH value to 5 to prepare an intermediate 6;
step A5: adding attapulgite into mixed acid, carrying out ultrasonic treatment for 1h at the temperature of 60 ℃ and the frequency of 30kHz, heating to 85 ℃, carrying out heat preservation for 2h, adding deionized water to the pH value of 7, filtering to remove filtrate, adding dimethyl sulfoxide into a filter cake, dispersing until the mixture is uniformly dispersed, adding the intermediate 6 and 1-hydroxybenzotriazole prepared in the step A4, and carrying out ultrasonic treatment for 1h at the frequency of 50kHz to prepare the oxidation-resistant filler.
The reinforcing filler is prepared by the following steps:
step B1: heating glass fiber at 350 ℃ for 10s, adding the glass fiber into a modifier, soaking and stirring at the rotation speed of 60r/min and the temperature of 80 ℃ for 30min, filtering to remove filtrate, and drying at 120 ℃ to obtain modified glass fiber;
step B2: adding carbon nanotubes into acetone for soaking, performing ultrasonic treatment under the condition of 30kHz frequency, filtering to remove acetone, washing the carbon nanotubes for 3 times by using deionized water, washing for 20s each time, soaking the washed carbon nanotubes in a sodium hydroxide solution, preserving the heat for 10min at the temperature of 80 ℃, filtering to remove the sodium hydroxide solution, washing the carbon fibers until the surfaces of the carbon fibers are neutral, adding the carbon nanotubes into a nitric acid solution, soaking for 5min at the temperature of 50 ℃, filtering to remove the nitric acid solution, and drying the carbon nanotubes to prepare modified carbon nanotubes;
step B3: adding ethyl orthosilicate, ethanol and hydrochloric acid solution into a reaction kettle, and stirring for 20min at the rotation speed of 300r/min and the temperature of 25 ℃ to obtain silica sol;
step B4: and B1, adding the modified glass fiber, the modified carbon nano-tube and deionized water into a reaction kettle, stirring for 30min at the rotation speed of 500r/min, filtering to remove filtrate, adding a filter cake into the silica sol prepared in the step B3, performing ultrasonic treatment for 1h at the frequency of 10MHz, filtering to remove the filtrate, and roasting the filter cake for 3h at the temperature of 500 ℃ to prepare the reinforced filler.
Example 2
An environment-friendly rat-proof and termite-proof plastic insulated power cable comprises the following raw materials in parts by weight: 110 parts of PVC resin, 8 parts of oxidation-resistant filler, 8 parts of reinforcing filler, 4 parts of tributyl phosphate and 2 parts of stearic acid;
the insulated power cable is manufactured by the following steps:
step S1: heating PVC resin at 140 ℃ until PVC plastics are completely melted, adding an oxidation-resistant filler and a reinforcing filler, mixing for 10min, adding tributyl phosphate and stearic acid, and continuously mixing for 15min to obtain a rubber material;
step S2: tabletting the rubber material at the temperature of 140 ℃ to obtain rubber sheets with the thickness of 3mm, cutting into particles to obtain rubber particles, adding the rubber particles into five sections of single screws, and extruding at the temperature of 130 ℃, 140 ℃, 155 ℃, 140 ℃ and 135 ℃ to obtain rubber skins;
step S3: and (5) coating the rubber sheath prepared in the step S2 on the surface of the copper wire to prepare the insulated power cable.
The oxidation-resistant filler is prepared by the following steps:
step A1: adding phenol and dichloromethane into a reaction kettle, stirring until the phenol is completely dissolved at the conditions of the rotating speed of 200r/min and the temperature of 25 ℃, sequentially adding acetic anhydride and triethylamine, reacting for 2 hours to obtain an intermediate 1, adding the intermediate 1 and a nitric acid solution into the reaction kettle, and reacting for 1.2 hours at the rotating speed of 100r/min and the temperature of 60 ℃ to obtain an intermediate 2;
step A2: adding the intermediate 2 prepared in the step A1 into a reaction kettle, introducing isobutene to react for 4 hours at the temperature of 120 ℃ and the pressure of 0.6MPa, and then preserving heat for 1.5 hours at the pressure of 0.1MPa and the temperature of 45 ℃ to prepare an intermediate 3;
step A3: adding the intermediate 3 prepared in the step A2 and deionized water into a reaction kettle, stirring at the rotating speed of 200r/min until the mixture is uniformly mixed, adding a sulfuric acid solution and sodium dodecyl sulfate, introducing nitrogen, heating at the temperature of 70 ℃, dropwise adding a formaldehyde water solution to react for 2 hours to prepare an intermediate 4, adding the intermediate 4, iron powder and a hydrochloric acid solution into the reaction kettle, and reacting for 1 hour at the temperature of 30 ℃ to prepare an intermediate 5;
step A4: adding the intermediate 5 prepared in the step A3 and dimethylformamide into a reaction kettle, stirring until the two are uniformly mixed, adding sodium hydroxide, reacting for 30min at the rotation speed of 100r/min and the temperature of 25 ℃, and adjusting the pH value to 5 to prepare an intermediate 6;
step A5: adding attapulgite into mixed acid, carrying out ultrasonic treatment for 1h at the temperature of 60 ℃ and the frequency of 30kHz, heating to 85 ℃, carrying out heat preservation for 2h, adding deionized water to the pH value of 7, filtering to remove filtrate, adding dimethyl sulfoxide into a filter cake, dispersing until the mixture is uniformly dispersed, adding the intermediate 6 and 1-hydroxybenzotriazole prepared in the step A4, and carrying out ultrasonic treatment for 1h at the frequency of 50kHz to prepare the oxidation-resistant filler.
The reinforcing filler is prepared by the following steps:
step B1: heating glass fiber at 350 ℃ for 10s, adding the glass fiber into a modifier, soaking and stirring at the rotation speed of 60r/min and the temperature of 80 ℃ for 30min, filtering to remove filtrate, and drying at 120 ℃ to obtain modified glass fiber;
step B2: adding carbon nanotubes into acetone for soaking, performing ultrasonic treatment under the condition of 30kHz frequency, filtering to remove acetone, washing the carbon nanotubes for 3 times by using deionized water, washing for 20s each time, soaking the washed carbon nanotubes in a sodium hydroxide solution, preserving the heat for 10min at the temperature of 80 ℃, filtering to remove the sodium hydroxide solution, washing the carbon fibers until the surfaces of the carbon fibers are neutral, adding the carbon nanotubes into a nitric acid solution, soaking for 5min at the temperature of 50 ℃, filtering to remove the nitric acid solution, and drying the carbon nanotubes to prepare modified carbon nanotubes;
step B3: adding ethyl orthosilicate, ethanol and hydrochloric acid solution into a reaction kettle, and stirring for 20min at the rotation speed of 300r/min and the temperature of 25 ℃ to obtain silica sol;
step B4: and B1, adding the modified glass fiber, the modified carbon nano-tube and deionized water into a reaction kettle, stirring for 30min at the rotation speed of 500r/min, filtering to remove filtrate, adding a filter cake into the silica sol prepared in the step B3, performing ultrasonic treatment for 1h at the frequency of 10MHz, filtering to remove the filtrate, and roasting the filter cake for 3h at the temperature of 500 ℃ to prepare the reinforced filler.
Example 3
An environment-friendly rat-proof and termite-proof plastic insulated power cable comprises the following raw materials in parts by weight: 120 parts of PVC resin, 10 parts of oxidation-resistant filler, 10 parts of reinforcing filler, 5 parts of tributyl phosphate and 3 parts of stearic acid;
the insulated power cable is manufactured by the following steps:
step S1: heating PVC resin at 145 ℃ until PVC plastics are completely melted, adding an oxidation-resistant filler and a reinforcing filler, mixing for 15min, adding tributyl phosphate and stearic acid, and continuously mixing for 20min to obtain a rubber material;
step S2: tabletting the rubber material at 145 ℃ to obtain rubber sheets with the thickness of 5mm, cutting into granules to obtain rubber particles, adding the rubber particles into five sections of single screws, and extruding at 130 ℃, 140 ℃, 155 ℃, 140 ℃ and 135 ℃ to obtain rubber skins;
step S3: and (5) coating the rubber sheath prepared in the step S2 on the surface of the copper wire to prepare the insulated power cable.
The oxidation-resistant filler is prepared by the following steps:
step A1: adding phenol and dichloromethane into a reaction kettle, stirring until the phenol is completely dissolved at the rotation speed of 300r/min and the temperature of 30 ℃, sequentially adding acetic anhydride and triethylamine, reacting for 3 hours to obtain an intermediate 1, adding the intermediate 1 and a nitric acid solution into the reaction kettle, and reacting for 1.5 hours at the rotation speed of 120r/min and the temperature of 65 ℃ to obtain an intermediate 2;
step A2: adding the intermediate 2 prepared in the step A1 into a reaction kettle, introducing isobutene to react for 6 hours at the temperature of 125 ℃ and the pressure of 0.8MPa, and then preserving heat for 2 hours at the pressure of 0.15MPa and the temperature of 50 ℃ to prepare an intermediate 3;
step A3: adding the intermediate 3 prepared in the step A2 and deionized water into a reaction kettle, stirring at the rotating speed of 300r/min until the mixture is uniformly mixed, adding a sulfuric acid solution and sodium dodecyl sulfate, introducing nitrogen, heating at the temperature of 75 ℃, dropwise adding a formaldehyde water solution to react for 3 hours to prepare an intermediate 4, adding the intermediate 4, iron powder and a hydrochloric acid solution into the reaction kettle, and reacting for 1.5 hours at the temperature of 40 ℃ to prepare an intermediate 5;
step A4: adding the intermediate 5 prepared in the step A3 and dimethylformamide into a reaction kettle, stirring until the intermediates and the dimethylformamide are uniformly mixed, adding sodium hydroxide, reacting for 50min at the rotation speed of 150r/min and the temperature of 30 ℃, and adjusting the pH value to 6 to prepare an intermediate 6;
step A5: adding attapulgite into mixed acid, carrying out ultrasonic treatment for 1.5h under the conditions that the temperature is 65 ℃ and the frequency is 50kHz, heating to 90 ℃, carrying out heat preservation for 3h, adding deionized water to the pH value of 7, filtering to remove filtrate, adding dimethyl sulfoxide into a filter cake, dispersing until the mixture is uniformly dispersed, adding the intermediate 6 and 1-hydroxybenzotriazole prepared in the step A4, and carrying out ultrasonic treatment for 1.5h under the condition that the frequency is 80kHz to obtain the oxidation-resistant filler.
The reinforcing filler is prepared by the following steps:
step B1: heating glass fiber at 400 ℃ for 15s, adding the glass fiber into a modifier, soaking and stirring at the rotation speed of 80r/min and the temperature of 85 ℃ for 40min, filtering to remove filtrate, and drying at 130 ℃ to obtain modified glass fiber;
step B2: adding carbon nanotubes into acetone for soaking, performing ultrasonic treatment under the condition of 50kHz frequency, filtering to remove acetone, washing the carbon nanotubes for 5 times by using deionized water, washing for 30s each time, soaking the washed carbon nanotubes in a sodium hydroxide solution, preserving heat for 15min at the temperature of 90 ℃, filtering to remove the sodium hydroxide solution, washing the carbon fibers until the surfaces of the carbon fibers are neutral, adding the carbon nanotubes into a nitric acid solution, soaking for 10min at the temperature of 60 ℃, filtering to remove the nitric acid solution, and drying the carbon nanotubes to obtain modified carbon nanotubes;
step B3: adding ethyl orthosilicate, ethanol and a hydrochloric acid solution into a reaction kettle, and stirring for 30min at the rotation speed of 500r/min and the temperature of 30 ℃ to obtain silica sol;
step B4: and B1, adding the modified glass fiber, the modified carbon nano-tube and deionized water into a reaction kettle, stirring for 40min at the rotation speed of 800r/min, filtering to remove filtrate, adding a filter cake into the silica sol prepared in the step B3, performing ultrasonic treatment for 1-3h at the frequency of 15MHz, filtering to remove the filtrate, and roasting the filter cake for 5h at the temperature of 600 ℃ to prepare the reinforcing filler.
Comparative example
The comparative example is a common power cable on the market.
The power cables prepared in the above examples 1 to 3 and comparative example were subjected to a performance test, and the test results are shown in table 1 below;
TABLE 1
Figure BDA0002620558050000141
As can be seen from Table 1 above, the notched Izod impact strength under normal conditions of the power cables prepared in examples 1 to 3 and comparative example was 18.5 to 19.1KJ/m2The notched Izod impact strength after thermal oxidation treatment is 18.5-18.8KJ/m2The notched Izod impact strength of the power cable obtained in the comparative example under normal conditions was 13.1KJ/m2The notched Izod impact strength after thermal oxidation treatment was 8.3KJ/m2The result shows that the power cable prepared by the invention has good oxidation resistance and impact resistance.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims (6)

1. The utility model provides an environment-friendly protection against rodents prevents insulating power cable of ant plastics which characterized in that: the feed comprises the following raw materials in parts by weight: 100-120 parts of PVC resin, 5-10 parts of oxidation-resistant filler, 5-10 parts of reinforcing filler, 3-5 parts of flame retardant and 1-3 parts of lubricant;
the insulated power cable is manufactured by the following steps:
step S1: heating PVC resin at the temperature of 140-145 ℃ until PVC plastics are completely melted, adding an oxidation-resistant filler and a reinforcing filler, mixing for 10-15min, adding a flame retardant and a lubricant, and continuously mixing for 15-20min to obtain a rubber material;
step S2: tabletting the rubber material at the temperature of 140 ℃ and 145 ℃ to obtain rubber sheets with the thickness of 3-5mm, granulating to obtain rubber particles, adding the rubber particles into five sections of single screws, and extruding under the conditions that the temperature of the five sections is 130 ℃, 140 ℃, 155 ℃, 140 ℃ and 135 ℃ respectively to obtain the rubber sheath;
step S3: and (5) coating the rubber sheath prepared in the step S2 on the surface of the copper wire to prepare the insulated power cable.
2. The environment-friendly rat-proof and termite-proof plastic insulated power cable according to claim 1, wherein: the flame retardant is one or a mixture of more of tributyl phosphate, tri (2-ethylhexyl) phosphate and tri (2-chloroethyl) phosphate in any proportion, and the lubricant is one or a mixture of more of stearic acid, butyl stearate and oleamide in any proportion.
3. The environment-friendly rat-proof and termite-proof plastic insulated power cable according to claim 1, wherein: the oxidation-resistant filler is prepared by the following steps:
step A1: adding phenol and dichloromethane into a reaction kettle, stirring until the phenol is completely dissolved under the conditions of the rotation speed of 200-300r/min and the temperature of 25-30 ℃, sequentially adding acetic anhydride and triethylamine, reacting for 2-3h to obtain an intermediate 1, adding the intermediate 1 and a nitric acid solution into the reaction kettle, and reacting for 1-1.5h under the conditions of the rotation speed of 100-120r/min and the temperature of 60-65 ℃ to obtain an intermediate 2;
step A2: adding the intermediate 2 prepared in the step A1 into a reaction kettle, introducing isobutene to react for 4-6h at the temperature of 120-125 ℃ and the pressure of 0.6-0.8MPa, and then preserving heat for 1-2h at the pressure of 0.1-0.15MPa and the temperature of 45-50 ℃ to prepare an intermediate 3;
step A3: adding the intermediate 3 prepared in the step A2 and deionized water into a reaction kettle, stirring at the rotation speed of 200-300r/min until the mixture is uniformly mixed, adding a sulfuric acid solution and sodium dodecyl sulfate, introducing nitrogen, heating at the temperature of 70-75 ℃, dropwise adding a formaldehyde water solution to react for 2-3h to prepare an intermediate 4, adding the intermediate 4, iron powder and a hydrochloric acid solution into the reaction kettle, and reacting for 1-1.5h at the temperature of 30-40 ℃ to prepare an intermediate 5;
step A4: adding the intermediate 5 prepared in the step A3 and dimethylformamide into a reaction kettle, stirring until the intermediates are uniformly mixed, adding sodium hydroxide, reacting for 30-50min at the rotation speed of 100-150r/min and the temperature of 25-30 ℃, and adjusting the pH value to 5-6 to prepare an intermediate 6;
step A5: adding attapulgite into mixed acid, carrying out ultrasonic treatment for 1-1.5h under the conditions that the temperature is 60-65 ℃ and the frequency is 30-50kHz, then heating to 85-90 ℃, carrying out heat preservation for 2-3h, adding deionized water until the pH value is 7, filtering to remove filtrate, adding dimethyl sulfoxide into a filter cake to disperse uniformly, adding the intermediate 6 and 1-hydroxybenzotriazole prepared in the step A4, and carrying out ultrasonic treatment for 1-1.5h under the condition that the frequency is 50-80kHz to obtain the oxidation-resistant filler.
4. The environment-friendly rat-proof and termite-proof plastic insulated power cable according to claim 3, wherein: the mass ratio of the phenol to the acetic anhydride in the step A1 is 1:1, the mass ratio of the triethylamine to the acetic anhydride is 3-5%, the mass ratio of the intermediate 1 to the nitric acid solution is 1:1-1.2, the mass fraction of the nitric acid solution is 55-60%, the mass ratio of the intermediate 2 to the isobutene in the step A2 is 1:1-1.5, the mass ratio of the intermediate 3, deionized water, the sulfuric acid solution, sodium dodecyl sulfate and the formaldehyde aqueous solution in the step A3 is 3-4g to 50mL to 4mL to 0.2-0.3g, the mass fraction of the formaldehyde aqueous solution is 20-30%, the mass ratio of the intermediate 4 to the hydrochloric acid solution is 2-3g to 5mL, the mass fraction of the hydrochloric acid solution is 10-15%, and the mass fraction of the iron powder is 3-5% of the intermediate 4, the using amount ratio of the intermediate 5 and the sodium hydroxide in the step A4 is 1:1, the mixed acid in the step A5 is a sulfuric acid solution and a nitric acid solution which are mixed according to the volume ratio of 3:1, the mass fraction of the sulfuric acid solution is 70-75%, the mass fraction of the nitric acid solution is 60-70%, the using amount ratio of the filter cake to the intermediate 6 is 5:1-1.5, and the using amount of the 1-hydroxybenzotriazole is 5-8% of the mass sum of the filter cake and the intermediate 6.
5. The environment-friendly rat-proof and termite-proof plastic insulated power cable according to claim 1, wherein: the reinforcing filler is prepared by the following steps:
step B1: heating the glass fiber at the temperature of 350-400 ℃ for 10-15s, adding the glass fiber into a modifier, soaking and stirring at the rotation speed of 60-80r/min and the temperature of 80-85 ℃ for 30-40min, filtering to remove filtrate, and drying at the temperature of 120-130 ℃ to obtain the modified glass fiber;
step B2: adding carbon nanotubes into acetone for soaking, performing ultrasonic treatment under the condition of frequency of 30-50kHz, filtering to remove acetone, washing the carbon nanotubes with deionized water for 3-5 times, washing for 20-30s each time, soaking the washed carbon nanotubes in a sodium hydroxide solution, preserving heat for 10-15min at the temperature of 80-90 ℃, filtering to remove the sodium hydroxide solution, washing the carbon fibers until the surface of the carbon fibers is neutral, adding the carbon nanotubes into a nitric acid solution, soaking for 5-10min at the temperature of 50-60 ℃, filtering to remove the nitric acid solution, and drying the carbon nanotubes to obtain modified carbon nanotubes;
step B3: adding ethyl orthosilicate, ethanol and hydrochloric acid solution into a reaction kettle, and stirring for 20-30min at the rotation speed of 300-500r/min and at the temperature of 25-30 ℃ to obtain silica sol;
step B4: adding the modified glass fiber, the modified carbon nanotube and deionized water prepared in the step B1 into a reaction kettle, stirring for 30-40min under the condition of the rotation speed of 800r/min, filtering to remove filtrate, adding the filter cake into the silica sol prepared in the step B3, performing ultrasonic treatment for 1-3h under the condition of the frequency of 10-15MHz, filtering to remove the filtrate, and roasting the filter cake for 3-5h under the condition of the temperature of 500 ℃ and 600 ℃ to prepare the reinforcing filler.
6. The environment-friendly rat-proof and termite-proof plastic insulated power cable according to claim 5, wherein: the modifier in the step B1 is formed by mixing gamma-aminopropyltriethoxysilane with ethanol in a volume ratio of 1-1.5:5, the dosage of the gamma-aminopropyltriethoxysilane is 0.5-1% of the mass of the glass fiber, the mass fraction of the sodium hydroxide solution in the step B2 is 10-13%, the mass fraction of the nitric acid solution is 30-40%, the dosage volume ratio of the ethyl orthosilicate, the ethanol and the hydrochloric acid solution in the step B3 is 14:2:1.5-2, the mass fraction of the hydrochloric acid solution is 16-18%, and the dosage mass ratio of the modified glass fiber and the modified carbon nanotube in the step B4 is 10: 1-1.5.
CN202010781901.4A 2020-08-06 2020-08-06 Environment-friendly rat-proof and termite-proof plastic insulated power cable Withdrawn CN111777830A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112250972A (en) * 2020-11-05 2021-01-22 玉环德谷新材料科技有限公司 Corrosion-resistant plastic and preparation method thereof
CN118155914A (en) * 2024-04-03 2024-06-07 江苏朗顺电工电气有限公司 High-strength anti-aging insulated wire for wind power and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112250972A (en) * 2020-11-05 2021-01-22 玉环德谷新材料科技有限公司 Corrosion-resistant plastic and preparation method thereof
CN118155914A (en) * 2024-04-03 2024-06-07 江苏朗顺电工电气有限公司 High-strength anti-aging insulated wire for wind power and preparation method thereof
CN118155914B (en) * 2024-04-03 2024-08-20 江苏朗顺电工电气有限公司 High-strength anti-aging insulated wire for wind power and preparation method thereof

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