CN112300493A - Anti-corrosion cable and preparation method thereof - Google Patents
Anti-corrosion cable and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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Abstract
The application relates to the technical field of electric wires and cables, and particularly discloses an anti-corrosion cable and a preparation method thereof. The anti-corrosion cable comprises the following components in parts by weight: a polypropylene resin; diglycolamine; modifying the nano silicon dioxide; aluminum hydroxide; a plasticizer; an antioxidant; a silicone oil; maleic anhydride grafted ethylene-vinyl acetate copolymer. The preparation method comprises the following steps: mixing polypropylene resin, modified nano-silica and aluminum hydroxide to obtain a mixture A; adding diglycolamine into the mixture A for mixing to obtain a mixture B; adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing to obtain a mixture C; extruding and granulating the mixture C to obtain a cable material; and melting and extruding the cable material, and coating the cable material on the surface of the wire to obtain the corrosion-resistant cable. The anti-corrosion cable can be used in an acidic environment and has the advantage of reducing cable corrosion.
Description
Technical Field
The application relates to the technical field of electric wires and cables, in particular to an anti-corrosion cable and a preparation method thereof.
Background
With the development of industries such as petrochemical industry, communication, traffic, building, electric power and the like in China, the demand of industries such as power plants, transformer substations, smelting, petrochemical industry and the like for cables is extremely large in recent years. The electric wire and cable are applied to more and more fields, the requirements on the load capacity and the working time are higher and higher, and a plurality of electric wires and cables need to be exposed outdoors and work under the severe environment, so the performance requirements on the materials used by the electric wires and cables are very strict, and the electric wires and cables have the advantages of corrosion resistance, high temperature resistance, flame retardance and the like.
In the correlation technique, the preparation raw materials of cable are mostly ordinary PVC cable material, and corrosion-resistant and wear resistance can be poor, and under the outdoor environment, especially in damp and hot or acid environment, the cable is suffered from the corruption easily, causes the ageing of circuit, leads to the life of cable to shorten greatly, arouses transmission line's trouble moreover easily, brings very big inconvenience for the resident on every side, also causes great loss for the electric power department. When the power maintenance personnel overhauls the circuit, if there is the cable corrosion ageing and electric leakage, also can lead to power maintenance personnel's operation process to have the potential safety hazard, must lead to the increase of its work load like this.
In view of the above-mentioned related technologies, the inventor believes that in practical application, the cable is affected by an acidic environment and is easily corroded and aged, and the corrosion resistance of the cable needs to be improved.
Disclosure of Invention
In order to improve the corrosion resistance of the cable and reduce the problem of corrosion and aging of the cable in an acidic environment, the application provides the anti-corrosion cable and the preparation method thereof.
In a first aspect, the present application provides an anti-corrosion cable, which adopts the following technical solution.
An anti-corrosion cable comprises the following components in parts by weight:
200 portions and 300 portions of polypropylene resin;
40-60 parts of diglycolamine;
30-80 parts of modified nano silicon dioxide;
100 portions and 150 portions of aluminum hydroxide;
10-20 parts of a plasticizer;
5-10 parts of an antioxidant;
5-10 parts of silicone oil;
20-50 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer;
the modified nano silicon dioxide is prepared by the following steps,
adding nano silicon dioxide into absolute ethyl alcohol, and uniformly stirring;
b, adding a silane coupling agent, heating to 50-60 ℃, and reacting for 3-4 h;
and c, drying the nano silicon dioxide at the temperature of 100-120 ℃ to obtain the modified nano silicon dioxide.
By adopting the technical scheme, the modified nano silicon dioxide and the aluminum hydroxide are dispersed on the surface of the polypropylene resin by mixing the polypropylene resin, the modified nano silicon dioxide and the aluminum hydroxide, so that the corrosion resistance and the strength of the prepared cable material can be improved, and meanwhile, the aluminum hydroxide is used as an inorganic flame retardant, so that the flame retardant property of the prepared cable material is improved. The added diglycolamine can be better wrapped on the surfaces of the modified nano silicon dioxide and the aluminum hydroxide, and the diglycolamine can absorb acid gas, so that the corrosion resistance of the prepared cable is further improved, and the service life of the cable in an acid environment is prolonged.
The nano-silica surface-modified by the silane coupling agent has good dispersibility in the base material, effectively reduces the powder agglomeration phenomenon of the nano-silica, enables the nano-silica to exist in the base material in a nano-form, and accordingly improves the corrosion resistance, heat resistance and flame retardance of the prepared cable material.
The added maleic anhydride grafted ethylene-vinyl acetate copolymer is used as a compatilizer, so that the compatibility of the polypropylene resin with an antioxidant and a plasticizer can be improved, and the macroscopic properties such as the strength of the cable material are indirectly improved. The silicone oil is used as a lubricant, and the friction between raw materials and the surface of processing equipment is reduced, so that the flow resistance of the melt is reduced, the viscosity of the melt is reduced, the fluidity of the melt is improved, the adhesion of the melt and the equipment is reduced, and the smoothness of the surface of a product is improved.
Preferably, the antioxidant is prepared by mixing dilauryl thiodipropionate and tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite ester according to the weight ratio of 1 (1-1.5).
By adopting the technical scheme, the antioxidant is added to remove peroxide free radicals generated in the oxidation reaction, reduce alkoxy or hydroxyl free radicals and decompose peroxides, so that the oxidation chain reaction is stopped, the oxidation reaction of the polymer can be inhibited or prolonged, and the aim of preventing the polymer from being oxidized is fulfilled. According to the performance detection result, 1 (1-1.5) is a better range of the weight ratio of the dilauryl thiodipropionate to the tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite ester.
Preferably, the plasticizer is one or more of dioctyl terephthalate, dioctyl phthalate, diisooctyl phthalate and dibutyl phthalate.
By adopting the technical scheme, the addition of the plasticizer can reduce intermolecular force, so that the viscosity of the polymer is reduced, the flexibility is enhanced, and the raw materials can be fully mixed, thereby improving the corrosion resistance, the flame retardant property and the mechanical property of the prepared cable material.
Preferably, the aluminum hydroxide is prepared by performing surface modification on the aluminum hydroxide by using a silane coupling agent, filtering, drying and crushing.
By adopting the technical scheme, the aluminum hydroxide modified by the silane coupling agent is not easy to agglomerate, the dispersibility of the aluminum hydroxide in the base material is improved, the aluminum hydroxide is made into powder, the aluminum hydroxide can be well dispersed on the surface of the base material, and meanwhile, the diglycolamine coating is facilitated, so that the cable material is not easy to deform on the basis of ensuring better corrosion resistance.
Preferably, the aluminum hydroxide powder has a particle size of 80 to 100 nm.
By adopting the technical scheme, the smaller the particle size of the aluminum hydroxide is, the easier the diglycolamine is to coat the surface of the aluminum hydroxide, and meanwhile, the smaller the particle size of the aluminum hydroxide is, the better the flame retardant property is.
Preferably, 40-60 parts of mica powder is also included.
By adopting the technical scheme, the mica powder is a pure natural mineral substance, does not contain harmful components such as formaldehyde and the like, is a good insulating material, can be converted into a ceramic substance when meeting high temperature after being mixed with polypropylene resin, has good strength and insulating property, and simultaneously is a good flame retardant, so that the flame retardant property of the cable material can be improved.
In a second aspect, the present application provides a method for preparing the above anticorrosion cable, which adopts the following technical scheme.
A method of making an anti-corrosion cable comprising the steps of:
s1, uniformly mixing the polypropylene resin, the modified nano-silica and the aluminum hydroxide for 5-10min at the rotating speed of 400-600rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 400-600rpm for 5-10min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 5-10min at the rotating speed of 400-600rpm to obtain a mixture C;
s4, extruding and granulating the mixture C to obtain a cable material;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the corrosion-resistant cable.
By adopting the technical scheme, the polypropylene resin, the modified nano-silica and the aluminum hydroxide are mixed to obtain the mixture A, so that the modified nano-silica and the aluminum hydroxide can be well dispersed in the base material, the corrosion resistance and the flame retardant property of the prepared cable material are improved, and then diglycolamine is added for mixing, so that the diglycolamine can be better wrapped on the surfaces of the modified nano-silica and the aluminum hydroxide, and the corrosion resistance of the cable material is further improved. Stirring in multiple steps, so that the dispersibility of the raw materials in the base material is better, and the corrosion resistance of the prepared cable material is improved.
Preferably, in the S4, a twin-screw extruder is used for extrusion granulation, the temperature of the twin-screw extruder is set to be 160-190 ℃, and the screw rotation speed is set to be 200-300 rpm.
By adopting the technical scheme, performance detection test results show that the prepared cable material has good corrosion resistance, heat resistance and mechanical property by adopting the extrusion temperature and the screw rotating speed within the range.
Preferably, mica powder is further added into the S1, and the mica powder is mixed with the polypropylene resin, the modified nano-silica and the aluminum hydroxide.
By adopting the technical scheme, the added mica powder is mixed with the polypropylene resin, and can be converted into a ceramic substance at high temperature, and the ceramic substance has good strength and insulating property, so that the corrosion resistance of the prepared cable is improved while the strength of the prepared cable is ensured.
In summary, the present application has the following beneficial effects:
1. because the added diglycolamine can be better wrapped on the surfaces of the modified nano silicon dioxide and the aluminum hydroxide, and the diglycolamine can absorb acid gas, the corrosion resistance of the cable is improved, and the service life of the cable in an acid environment is prolonged;
2. the modified nano-silica is preferably adopted in the application, and because the nano-silica is subjected to surface modification by the silane coupling agent, the occurrence of the powder agglomeration phenomenon of the nano-silica is reduced, so that the nano-silica exists in a nano form in a base material, the dispersibility of the nano-silica is improved, and the heat-resistant flame-retardant property and the mechanical property of the cable material are improved;
3. according to the preparation method, the raw materials are mixed in multiple steps, so that the raw materials are mixed more fully, the dispersibility of each raw material in the base material is improved, and meanwhile, diglycolamine can be better wrapped on the surfaces of the modified nano silicon dioxide and the aluminum hydroxide, so that the corrosion resistance of the prepared cable material is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The double-screw extruder in the embodiment of the application is manufactured by Zhang Jia gang Jun Er machinery Co., Ltd, and the model is SJz 65/132; the stirrer is a chemical stirrer produced by Qingzhou city and Liyuan building material machinery factories.
The polypropylene resin is obtained from Kai all-plastic collagen Co., Ltd, Dongguan city;
the silicone oil and diglycolamine are obtained from Kyong chemical Guangzhou company;
dilauryl thiodipropionate, tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite and maleic anhydride-grafted ethylene-vinyl acetate copolymer were obtained from taurulta plastics materials, Inc. of Dongguan;
dioctyl terephthalate was collected from wuhanxin mobile-beneficial chemical company, ltd;
the nano silicon dioxide and the aluminum hydroxide are both obtained from Shandong Sericidae new material Co., Ltd;
the silane coupling agent is taken from New Material Co., Ltd of Hippocastaceae, and is KH 550;
mica powder is collected from the ministry of macrobiotic chemical industry in the Jiulongpo area of Chongqing.
Preparation examples of raw materials
Preparation example 1: a modified nano silicon dioxide is prepared through such steps as preparing the modified nano silicon dioxide,
adding 40kg of nano silicon dioxide into 4000mL of absolute ethyl alcohol, and uniformly stirring;
b, adding 200mL of silane coupling agent KH550, heating to 50 ℃, and reacting for 3 h;
and c, drying the nano silicon dioxide at the temperature of 100 ℃ for 30min to obtain the modified nano silicon dioxide.
Preparation example 2: a modified nano silicon dioxide is prepared through such steps as preparing the modified nano silicon dioxide,
adding 40kg of nano silicon dioxide into 4000mL of absolute ethyl alcohol, and uniformly stirring;
b, adding 200mL of silane coupling agent KH550, heating to 55 ℃, and reacting for 3.5 h;
and c, drying the nano silicon dioxide at the temperature of 110 ℃ for 30min to obtain the modified nano silicon dioxide.
Preparation example 3: a modified nano silicon dioxide is prepared through such steps as preparing the modified nano silicon dioxide,
adding 40kg of nano silicon dioxide into 4000mL of absolute ethyl alcohol, and uniformly stirring;
b, adding 200mL of silane coupling agent KH550, heating to 60 ℃, and reacting for 4 h;
and c, drying the nano silicon dioxide at the temperature of 120 ℃ for 30min to obtain the modified nano silicon dioxide.
Examples
Example 1: an anti-corrosion cable, the components and corresponding parts by weight of the anti-corrosion cable are shown in Table 1 and prepared by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1 and the aluminum hydroxide into a stirrer, and uniformly mixing for 5min at the rotating speed of 400rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 400rpm for 5min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 5min at the rotating speed of 400rpm to obtain a mixture C;
s4, putting the mixture C into a double-screw extruder for extrusion and granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are 160 ℃,160 ℃, 165 ℃, 175 ℃,180 ℃,180 ℃ and the screw rotation speed is 200 rpm;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the corrosion-resistant cable.
Wherein the antioxidant is prepared by mixing dilauryl thiodipropionate and tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite ester according to the weight ratio of 1: 1; dioctyl terephthalate was used as the plasticizer.
Examples 2 to 6: an anti-corrosion cable differs from example 1 in that the components and their respective parts by weight are as shown in table 1.
TABLE 1 Components and weights (kg) thereof in examples 1-6
Example 7: an anticorrosion cable which is different from the anticorrosion cable of example 1 in that the modified nano-silica prepared in preparation example 2 is used.
Example 8: an anticorrosion cable which is different from example 1 in that the modified nano-silica prepared in preparation example 3 is used.
Example 9: an anti-corrosion cable, which is different from example 1 in that it is prepared by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1 and the aluminum hydroxide into a stirrer, and uniformly mixing for 8min at the rotating speed of 500rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 500rpm for 8min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 8min at the rotating speed of 500rpm to obtain a mixture C;
s4, putting the mixture C into a double-screw extruder for extrusion and granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are 160 ℃,160 ℃, 175 ℃,180 ℃,190 ℃,190 ℃ and 190 ℃, and the screw rotation speed is 250 rpm;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the corrosion-resistant cable.
Example 10: an anti-corrosion cable, which is different from example 1 in that it is prepared by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1 and the aluminum hydroxide into a stirrer, and uniformly mixing for 10min at the rotating speed of 600rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 600rpm for 10min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 10min at the rotating speed of 600rpm to obtain a mixture C;
s4, putting the mixture C into a double-screw extruder for extrusion and granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are respectively 170 ℃, 170 ℃, 175 ℃, 185 ℃,190 ℃,190 ℃ and 190 ℃, and the screw rotation speed is 300 rpm;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the corrosion-resistant cable.
Example 11: an anticorrosion cable is different from the anticorrosion cable in example 1 in that the antioxidant is prepared by mixing dilauryl thiodipropionate and tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite according to a weight ratio of 1: 1.3.
Example 12: an anticorrosion cable which is different from that in example 1 in that the antioxidant is composed of dilauryl thiodipropionate and tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite in a weight ratio of 1: 1.5.
Example 13: an anticorrosion cable is different from the anticorrosion cable in embodiment 1 in that aluminum hydroxide is adopted, the surface of the aluminum hydroxide is modified by a silane coupling agent KH550, the aluminum hydroxide is filtered, dried and crushed to prepare aluminum hydroxide powder, the aluminum hydroxide powder is obtained from Gallery Peng color fine chemical industry Co., Ltd, and the particle size of the aluminum hydroxide powder is 80 nm.
Example 14: an anticorrosion cable is different from the anticorrosion cable in embodiment 1 in that aluminum hydroxide is adopted and is subjected to surface modification by a silane coupling agent KH550, and is subjected to filtration, drying and crushing to prepare aluminum hydroxide powder, wherein the aluminum hydroxide powder is obtained from Gallery Peng color fine chemical Co., Ltd, and the particle size of the powder is 90 nm.
Example 15: an anti-corrosion cable is different from the cable in the embodiment 1 in that aluminum hydroxide is adopted and is subjected to surface modification by a silane coupling agent KH550, and is subjected to filtration, drying and crushing to prepare aluminum hydroxide powder, wherein the aluminum hydroxide powder is obtained from Gallery Peng color fine chemical industry Co., Ltd, and the particle size of the aluminum hydroxide powder is 100 nm.
Example 16, an anticorrosion cable, which is different from example 1 in that 40kg of mica powder was further added, and the mica powder was mixed with the raw materials by adding a stirrer in S1.
Example 17, an anticorrosion cable, which is different from example 1 in that 50kg of mica powder was further added, and the mica powder was mixed with the raw materials by adding a stirrer in S1.
Example 18, an anticorrosion cable, which is different from example 1 in that 60kg of mica powder was further added, and the mica powder was mixed with the raw materials by adding a stirrer to S1.
Comparative example
Comparative example 1: a cable which differs from example 1 in that diethanolamine is not added.
Comparative example 2: a cable differing from example 1 in that unmodified nanosilica was added.
Comparative example 3: a cable, different from example 1, is prepared by the following steps of modified nano-silica,
adding 20 parts of nano silicon dioxide into 200 parts of absolute ethyl alcohol, and uniformly stirring;
b, adding 100 parts of silane coupling agent KH550, heating to 40 ℃, and reacting for 2 hours;
and c, drying the nano silicon dioxide at the temperature of 80 ℃ for 30min to obtain the modified nano silicon dioxide.
Comparative example 4: a cable, different from example 1, is prepared by the following steps of modified nano-silica,
adding 20 parts of nano silicon dioxide into 200 parts of absolute ethyl alcohol, and uniformly stirring;
b, adding 100 parts of silane coupling agent KH550, heating to 70 ℃, and reacting for 5 hours;
and c, drying the nano silicon dioxide at the temperature of 130 ℃ for 30min to obtain the modified nano silicon dioxide.
Comparative example 5: a cable, which differs from example 1 in that it is obtained by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1, aluminum hydroxide and diglycolamine into a stirrer, and uniformly mixing at the rotating speed of 500rpm for 8min to obtain a mixture A;
s2, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture A, and continuously mixing for 8min at the rotating speed of 500rpm to obtain a mixture B;
s3, putting the mixture B into a double-screw extruder for extrusion and granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are 160 ℃,160 ℃, 175 ℃,180 ℃,190 ℃,190 ℃ and 190 ℃, and the screw rotation speed is 250 rpm;
and S4, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the cable.
Comparative example 6: a cable, which differs from example 1 in that it is obtained by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1 and the aluminum hydroxide into a stirrer, and uniformly mixing for 3min at the rotating speed of 300rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 300rpm for 3min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 3min at the rotating speed of 300rpm to obtain a mixture C;
s4, putting the mixture C into a double-screw extruder for extrusion and granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are 130 ℃, 130 ℃, 145 ℃, 150 ℃,160 ℃,160 ℃ and 160 ℃, and the screw rotation speed is 180 rpm;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the cable.
Comparative example 7: a cable, which differs from example 1 in that it is obtained by the following steps,
s1, adding the polypropylene resin, the modified nano-silica prepared in the preparation example 1 and the aluminum hydroxide into a stirrer, and uniformly mixing for 12min at the rotating speed of 700rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 700rpm for 12min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 12min at the rotating speed of 700rpm to obtain a mixture C;
s4, putting the mixture C into a double-screw extruder for extrusion granulation to obtain a cable material, wherein the set temperatures of all sections of the double-screw extruder are respectively 170 ℃, 170 ℃, 185 ℃,190 ℃,200 ℃,200 ℃ and 200 ℃, and the screw rotating speed is 400 rpm;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the cable.
Comparative example 8: a cable differing from example 1 in that the antioxidant was composed of dilauryl thiodipropionate mixed with tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite in a weight ratio of 1: 0.8.
Comparative example 9: a cable differing from example 1 in that the antioxidant was composed of dilauryl thiodipropionate mixed with tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite in a weight ratio of 1: 1.8.
Comparative example 10: the cable is different from the cable in the embodiment 1 in that aluminum hydroxide is adopted and is subjected to surface modification by a silane coupling agent KH550, and is subjected to filtration, drying and crushing to prepare aluminum hydroxide powder, wherein the aluminum hydroxide powder is obtained from Gallery Peng color fine chemical industry Co., Ltd, and the particle size of the aluminum hydroxide powder is 50 nm.
Comparative example 11: the cable is different from the cable in the embodiment 1 in that aluminum hydroxide is adopted and is subjected to surface modification by a silane coupling agent KH550, and is subjected to filtration, drying and crushing to prepare aluminum hydroxide powder, wherein the aluminum hydroxide powder is obtained from Gallery Peng color fine chemical industry Co., Ltd, and the particle size of the powder is 120 nm.
Comparative example 12: a cable is different from the cable in example 1 in that 30kg of mica powder is added, and the mica powder is mixed with raw materials by adding a stirrer in S1.
Comparative example 13: a cable is different from the cable in example 1 in that 70kg of mica powder is added, and the mica powder is mixed with raw materials by adding a stirrer in S1.
Performance test
10 cables prepared in examples 1 to 18 and comparative examples 1 to 13 were processed into test samples having a length of 10cm, respectively, and the correlation properties were measured, and the average of the test results of each group was taken as the test result of the group.
The tensile properties of the samples were tested using the method specified in GB/T1040.3-2006.
The corrosion resistance test of the test sample is carried out by simulating an acid environment, and the specific method comprises the following steps: the method comprises the steps of adopting a salt spray water spraying testing machine which is produced by Suzhouxin Huibao instrument limited and has the model of XB-OTS-120, carrying out an acid salt spray test on a sample in a specific test box, adding acetic acid into salt water containing (5 +/-0.5)% of sodium chloride to reduce the pH value to 3.2 +/-0.1, continuously spraying by a spraying device to enable salt spray to be settled on the sample to be tested, and observing the surface corrosion state of the sample after a certain time. The temperature of the test chamber is set to be (35 +/-1) DEG C, the humidity is greater than 85 percent, and the fog reduction amount is set to be 2 mL/h;
the test results are shown in table 2 below.
As can be seen from the test data in table 2: the anti-corrosion cables prepared in the embodiments 1 to 18 are not corroded after 48 hours of an acid salt spray test, and the tensile strength is higher than 12MPa, which shows that the anti-corrosion cables prepared in the embodiments of the present application have good corrosion resistance and mechanical properties, and can be better applied to an acid environment.
By combining the example 1 and the comparative examples 1 and 2, and combining the table 2, it can be seen that, compared with the example 1, the diethanolamine is not added in the comparative example 1, which causes the prepared cable to be corroded after passing through the acid salt spray test for 38 hours, and the tensile strength is obviously reduced, the unmodified nano silica is added in the comparative example 2, which causes the prepared cable to be corroded after passing through the acid salt spray test for 40 hours, and the tensile strength is obviously reduced, which indicates that the corrosion resistance of the cable material can be remarkably improved by adding the diethanolamine, and meanwhile, the modified nano silica has better dispersibility in the base material, so that the diethanolamine can be more fully wrapped on the surface of the nano silica, thereby achieving good corrosion resistance effect, and simultaneously, improving the mechanical properties of the cable material.
By combining examples 1, 7 and 8 and comparative examples 3 and 4, and by combining table 2, it can be seen that the corrosion resistance and tensile property of the modified nano-silica prepared under different preparation conditions are significantly different, wherein the cables prepared in comparative examples 3 and 4 are corroded after 43 hours of acid salt spray test, and the tensile strength is slightly reduced, which indicates that the reaction temperature is 50-60 ℃ after adding silane coupling agent KH550, the reaction time is 3-4 hours, and the temperature is 110-120 ℃ during drying.
By combining example 9 and comparative example 5, and table 2, it can be seen that the corrosion resistance and tensile strength of the cable prepared in comparative example 5 are both reduced compared with those of the cable prepared in example 9, which indicates that after the polypropylene resin, the modified nano-silica and the aluminum hydroxide are uniformly stirred, diglycolamine is added for stirring, which is helpful for improving the corrosion resistance and tensile strength of the cable material.
By combining examples 1, 9 and 10 and comparative examples 6 and 7, and by combining Table 2, it can be seen that, in the cable preparation process, the rotation speed and time of the stirrer and the temperature and rotation speed of the twin-screw extruder all have different degrees of influence on the corrosion resistance and mechanical properties of the cable material, when preparing the cable material, the preferred rotation speed of the stirrer is 400-300 rpm, the preferred mixing time is 5-10min, the preferred set temperature of the twin-screw extruder is 190 ℃ and the preferred rotation speed is 200-300 rpm.
Combining examples 1, 11 and 12 and comparative examples 8 and 9, and combining table 2, it can be seen that different raw material ratios of the antioxidant can affect the corrosion resistance and tensile strength of the cable material, wherein the preferred weight ratio of dilauryl thiodipropionate to tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite is 1: (1-1.5).
In combination with examples 1, 13, 14, 15 and comparative examples 10, 11, and in combination with Table 2, it can be seen that the corrosion resistance and mechanical properties of the cable material can be improved by using aluminum hydroxide powder instead of aluminum hydroxide, wherein the improvement effect is most excellent when the particle size of the aluminum hydroxide powder is 90nm, and the optimum range of the aluminum hydroxide powder is 80 to 100 nm.
By combining examples 1, 16, 17 and 18 and comparative examples 12 and 13, and combining table 2, it can be seen that the tensile strength of the cable material can be significantly improved by adding the mica powder, wherein when the addition amount of the mica powder is 50 parts, the effect is best, and the preferable addition amount of the mica powder is 40-60 parts.
Table 2 results of performance testing
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The anti-corrosion cable is characterized by comprising the following components in parts by weight:
200 portions and 300 portions of polypropylene resin;
40-60 parts of diglycolamine;
30-80 parts of modified nano silicon dioxide;
100 portions and 150 portions of aluminum hydroxide;
10-20 parts of a plasticizer;
5-10 parts of an antioxidant;
5-10 parts of silicone oil;
20-50 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer;
the modified nano silicon dioxide is prepared by the following steps,
adding nano silicon dioxide into absolute ethyl alcohol, and uniformly stirring;
b, adding a silane coupling agent, heating to 50-60 ℃, and reacting for 3-4 h;
and c, drying the nano silicon dioxide at the temperature of 100-120 ℃ to obtain the modified nano silicon dioxide.
2. The corrosion-protected cable according to claim 1, wherein said antioxidant comprises dilauryl thiodipropionate in combination with tris (2, 4-di-tert-butyl-4-hydroxyphenyl) phosphite in a weight ratio of 1 (1-1.5).
3. The corrosion-inhibited cable according to claim 1, wherein the plasticizer is one or more of dioctyl terephthalate, dioctyl phthalate, diisooctyl phthalate and dibutyl phthalate.
4. The anti-corrosion cable according to claim 1, wherein the aluminum hydroxide is an aluminum hydroxide powder obtained by surface modification with a silane coupling agent, filtration, drying and pulverization.
5. An anti-corrosion cable according to claim 4, characterized in that the aluminium hydroxide powder has a particle size of 80-100 nm.
6. The corrosion-resistant cable according to claim 1, further comprising 40-60 parts of mica powder.
7. A process for the preparation of an anti-corrosion cable according to any of claims 1 to 6, characterized in that it comprises the following steps:
s1, uniformly mixing the polypropylene resin, the modified nano-silica and the aluminum hydroxide for 5-10min at the rotating speed of 400-600rpm to obtain a mixture A;
s2, adding diglycolamine into the mixture A, and uniformly mixing at the rotating speed of 400-600rpm for 5-10min to obtain a mixture B;
s3, adding an antioxidant, a plasticizer, a maleic anhydride grafted ethylene-vinyl acetate copolymer and silicone oil into the mixture B, and continuously mixing for 5-10min at the rotating speed of 400-600rpm to obtain a mixture C;
s4, extruding and granulating the mixture C to obtain a cable material;
and S5, melting and extruding the cable material, coating the cable material on the surface of the wire, and cooling and solidifying to obtain the corrosion-resistant cable.
8. The method for preparing an anticorrosion cable as recited in claim 7, wherein in S4, the extrusion granulation is performed by using a twin-screw extruder, the temperature of the twin-screw extruder is set to 160 ℃ and the rotation speed of the screw is set to 200rpm and 300 rpm.
9. The method for preparing an anti-corrosion cable according to claim 7, wherein mica powder is further added in the S1, and the mica powder is mixed with the polypropylene resin, the modified nano silica and the aluminum hydroxide.
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