CN116120751B - Weather-resistant torsion-resistant cable sheath material for wind power generation and preparation method thereof - Google Patents

Weather-resistant torsion-resistant cable sheath material for wind power generation and preparation method thereof Download PDF

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CN116120751B
CN116120751B CN202310392016.0A CN202310392016A CN116120751B CN 116120751 B CN116120751 B CN 116120751B CN 202310392016 A CN202310392016 A CN 202310392016A CN 116120751 B CN116120751 B CN 116120751B
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席浩
席文林
虢湘刿
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Jiangsu Outing Polymer Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/005—Methods for mixing in batches
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
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    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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Abstract

The invention relates to the technical field of wire and cable materials, in particular to a weather-resistant torsion-resistant cable sheath material for wind power generation and a preparation method thereof. The cable sheath material disclosed by the invention is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 30-40 parts of ethylene-octene copolymer, 10-20 parts of styrene-butadiene-styrene block copolymer, 5-8 parts of tetrapod-like zinc oxide whiskers, 4-6 parts of acid modified PBO fibers, 15-20 parts of white carbon black, 3-5 parts of talcum powder, 2-3 parts of silane coupling agent, 3-5 parts of plasticizer, 1-2 parts of polyethylene wax, 0.5-1.5 parts of antioxidant, 2-3 parts of vulcanizing agent and 0.5-1 part of auxiliary vulcanizing agent. According to the invention, through the design of the resin matrix and the reinforcing material, the weather resistance, low-temperature impact resistance, embrittlement resistance and torsion resistance of the sheath material can be effectively improved, and the use requirement of the wind power generation cable sheath can be effectively met.

Description

Weather-resistant torsion-resistant cable sheath material for wind power generation and preparation method thereof
Technical Field
The invention relates to the technical field of wire and cable materials, in particular to a weather-resistant torsion-resistant cable sheath material for wind power generation and a preparation method thereof.
Background
With the gradual prominence of environmental problems and the continuous promotion of sustainable development concepts, the development and the utilization of wind energy resources and the market prospect of wind power generation are wide. In order to meet the requirement of rapid development of wind power generation, more requirements are put forward for matched wind power equipment and wind power materials. Wind power cables are the main components for connecting wind power plants, and research thereof has important significance for promoting the development of renewable energy sources. Because the wind energy cable is used in areas with severe weather conditions, the working condition environment is harsh, complex and changeable, the temperature difference between day and night is large, the material replacement difficulty is high, the replacement cost is high, and the service life of the wind energy cable becomes a key factor for restricting wind energy development.
The cable sheath material used by the wind energy cable is arranged outside the cable metal conductor layer and the insulating protective layer, and the sheath material is required to face direct test of external environment, so that the quality and the quality of the cable sheath material are important to prolonging the service life of the whole cable.
At present, the existing cable sheath material is mainly made of polyethylene materials or polyvinyl chloride materials, but the materials are gradually exposed in severe working condition occasions such as severe cold or high temperature and the like, have the problems of poor weather resistance, easiness in cracking and ageing and the like, so that the application of the cable sheath material is limited to a certain extent. In particular, the cables of the wind power generator tower sections and the connection sections often need to be twisted frequently, which also puts higher demands on the torsion resistance of the wind power cables. However, in the actual engineering at the present stage, the cable sheath material cannot effectively meet the comprehensive requirements of the wind energy cable on weather resistance and torsion resistance, is not beneficial to the improvement of the whole service life of the cable, and brings difficulty to the use and maintenance of the wind energy cable.
Disclosure of Invention
The invention aims to provide a weather-resistant torsion-resistant cable sheath material for wind power generation, which has excellent weather resistance and torsion resistance, and is suitable for the field of wind power generation.
The invention further aims to provide a preparation method of the weather-resistant torsion-resistant cable sheath material for wind power generation, which can be used for preparing the cable sheath material with high performance.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a weather-resistant torsion-resistant cable sheath material for wind power generation is composed of the following raw materials in parts by mass:
100 parts of methyl vinyl silicone rubber, 30-40 parts of ethylene-octene copolymer, 10-20 parts of styrene-butadiene-styrene block copolymer, 5-8 parts of tetrapod-like zinc oxide whiskers, 4-6 parts of acid modified PBO fibers, 15-20 parts of white carbon black, 3-5 parts of talcum powder, 2-3 parts of silane coupling agent, 3-5 parts of plasticizer, 1-2 parts of polyethylene wax, 0.5-1.5 parts of antioxidant, 2-3 parts of vulcanizing agent and 0.5-1 part of auxiliary vulcanizing agent.
The weather-resistant torsion-resistant cable sheath material for wind power generation adopts methyl vinyl silicone rubber, ethylene-octene copolymer and styrene-butadiene-styrene segmented copolymer to carry out blending polymerization to form a polymer matrix, and adopts tetrapod-like zinc oxide whisker, acid-modified PBO fiber, white carbon black and talcum powder to carry out mixing reinforcing modification on the polymer matrix, so that the toughness and strength of the sheath material are improved, and the weather resistance and torsion resistance of the material are improved.
Compared with other sizing materials, the methyl vinyl silicone rubber has better temperature resistance and cold resistance and better flexibility of molecular chains due to the special structural framework. However, methyl vinyl silicone rubber is susceptible to thermal aging or crosslinking hardening under extreme conditions. Therefore, the structural stability of the methyl vinyl silicone rubber needs to be improved by an improved means so as to meet higher application requirements. The invention combines methyl vinyl silicone rubber and ethylene-octene copolymer, which can endow the matrix with good bending property, softness and weather resistance, but has poor compatibility and processability. The invention further adds the styrene-butadiene-styrene block copolymer into the matrix system, which can improve the compatibility among the components of the substrate and promote the improvement of the toughness and strength of the material.
Furthermore, the invention adopts the tetrapod-like zinc oxide whisker, the acid modified PBO fiber, the white carbon black and the talcum powder to carry out reinforcing modification on the sheath matrix. Compared with the conventional reinforcing system of white carbon black and talcum powder, the four-needle zinc oxide whisker and acid modified PBO fiber are introduced, so that the four-needle zinc oxide whisker and acid modified PBO fiber can be effectively dispersed in a rubber matrix, the chimeric effect between a reinforcing material and a resin matrix can be improved, the structure of a polymer network formed by crosslinking and the crosslinking degree of the rubber matrix are synergistically enhanced, and the weather resistance and the torsion resistance of the material are comprehensively improved.
Preferably, the methyl vinyl silicone rubber is a combination of a methyl terminated silicone rubber and a vinyl terminated silicone rubber; the mass ratio of the methyl-terminated silicone rubber to the ethylene-terminated silicone rubber is (3-4): (1-2). According to the invention, the silicone rubber with different end capping groups and different vinyl contents is used in a composite manner, so that the crosslinking density of the rubber matrix can be effectively regulated and controlled, the molecular chain flexibility of the rubber matrix is enhanced on the basis of ensuring the mechanical strength of the silicone rubber, the strength and toughness are both realized, and the weather resistance and torsion resistance of the material are ensured.
Further, the relative molecular weight of the methyl-terminated silicone rubber is 45-80 ten thousand, and the vinyl content is 0.07-0.12%; the relative molecular weight of the vinyl-terminated silicone rubber is 45-80 ten thousand, and the vinyl content is 0.13-0.20%.
Preferably, the length of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 10-50 mu m, and the diameter of the root is 0.5-5 mu m. The tetrapod-like zinc oxide whisker has a special three-dimensional structure, and can improve the temperature resistance and the denaturation of the composite material and slow down the cracking caused by shrinkage or deformation by introducing the tetrapod-like zinc oxide whisker into a rubber matrix.
In the present invention, preferably, the acid-modified PBO fiber is a PBO fiber obtained by modifying with concentrated nitric acid. The PBO fiber, namely the poly-p-phenylene benzobisoxazole fiber, has high strength and high modulus, and belongs to one of organic fibers. The unmodified PBO fiber has poor compatibility with the matrix, has poor reinforcing effect, and cannot achieve effective blending reinforcing effect. According to the invention, the PBO fiber is subjected to acid modification treatment, so that the surface roughness of the fiber can be increased, and the PBO fiber can be effectively dispersed in the silicone rubber matrix.
Preferably, the silane coupling agent is one of tetraethyl silicate, (3-aminopropyl) triethoxysilane.
The plasticizer is added to improve the fluidity and processability of the composite system, preferably, the plasticizer is one of diethyl phthalate, dibutyl phthalate and dioctyl phthalate.
The antioxidant is one of an antioxidant 545, an antioxidant 168 and an antioxidant 1010.
Further, the vulcanizing agent is dicumyl peroxide or trimethylolpropane trimethacrylate; the auxiliary vulcanizing agent is triallyl isocyanurate.
The invention relates to a preparation method of a weather-resistant torsion-resistant cable sheath material for wind power generation, which comprises the following steps:
(1) Stirring and mixing a silane coupling agent, tetrapod-like zinc oxide whiskers and acid-modified PBO fibers in absolute ethyl alcohol for 30-60 min, and washing and drying after reaction to obtain a mixed reinforcing material;
(2) Mixing methyl vinyl silicone rubber, an ethylene-octene copolymer and a styrene-butadiene-styrene block copolymer in an internal mixer at 60-70 ℃ for 2-4 min, adding a mixed reinforcing material, white carbon black, talcum powder, a plasticizer, polyethylene wax and an antioxidant, heating to 100-120 ℃ and mixing for 8-10 min, and standing at room temperature for 8-12 h to obtain mixed rubber;
(3) Adding a vulcanizing agent and a vulcanization aid into the mixed glue, mixing for 3-5 minutes on an open mill, uniformly and then carrying out thin-pass for 3-5 times, and then carrying out compression molding vulcanization molding at 130-140 ℃ and drying to obtain the finished product.
According to the preparation method of the weather-resistant torsion-resistant cable sheath material for wind power generation, the silane coupling agent is adopted to carry out preliminary modification treatment on the tetrapod-like zinc oxide whiskers and the acid-modified PBO fibers, so that the number of active groups on the surface of the material can be increased, the surface activity of the material can be enhanced, the compatibility and the dispersibility of the tetrapod-like zinc oxide whiskers and the acid-modified PBO fibers in a rubber substrate can be improved, and the enhancement effect of the composite material can be ensured. Furthermore, the invention adopts a multi-section mixing method of batch charging, can improve mixing efficiency and ensure polymer crosslinking effect, thereby preparing the sheath material with weather resistance and torsion resistance, and is suitable for industrial preparation and application of the sheath material.
Detailed Description
In order to more clearly illustrate the technical scheme of the invention, the invention is further described below by combining specific embodiments. It will be appreciated by those skilled in the art that the following examples are provided for the understanding and description of the present invention only and are not to be construed as limiting the scope of the invention.
In the following examples, the relative molecular weight of the methyl-terminated silicone rubber is 45-80 ten thousand, the vinyl content is 0.07-0.12%, and the model is 110-1; the relative molecular weight of the vinyl-terminated silicon rubber is 45-80 ten thousand, the vinyl content is 0.13-0.20%, and the model is 110-2S. Ethylene-octene copolymer (POE) brand No. dow 8200. The styrene-butadiene-styrene block copolymer is designated D1102K.
The elastic modulus of the PBO fiber is 180GPa, and the tensile strength is 5.8GPa. The preparation method of the acid modified PBO fiber comprises the following steps: the PBO fiber is soaked in concentrated nitric acid solution (the dosage of the PBO fiber and the concentrated nitric acid is 5g:50 mL), treated for 4 hours at 50 ℃, and then washed and dried to obtain the acid modified PBO fiber.
Example 1
The weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following raw materials in parts by mass:
100 parts of methyl vinyl silicone rubber, 35 parts of ethylene-octene copolymer, 15 parts of styrene-butadiene-styrene block copolymer, 7 parts of tetrapod-like zinc oxide whisker, 5 parts of acid modified PBO fiber, 20 parts of white carbon black, 4 parts of talcum powder, 3 parts of silane coupling agent, 4 parts of plasticizer, 2 parts of polyethylene wax, 1 part of antioxidant, 2 parts of vulcanizing agent and 0.5 part of auxiliary vulcanizing agent.
Wherein the methyl vinyl silicone rubber is a combination of methyl silicone rubber and vinyl silicone rubber; mass ratio of methyl terminated silicone rubber to vinyl terminated silicone rubber is 3:2. the length of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 10-50 mu m, and the diameter of the root is 0.5-5 mu m; the silane coupling agent is tetraethyl silicate; the plasticizer is dibutyl phthalate; the antioxidant is antioxidant 1010. The vulcanizing agent is dicumyl peroxide; the auxiliary vulcanizing agent is triallyl isocyanurate.
The preparation method of the weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following steps:
(1) Mixing a silane coupling agent, tetrapod-like zinc oxide whiskers and acid-modified PBO fibers in absolute ethyl alcohol according to a ratio, stirring and mixing for 40min (the dosage ratio of the silane coupling agent to the absolute ethyl alcohol is 3g:60 mL), washing after reaction, and drying at 60 ℃ to obtain a mixed reinforcing material;
(2) Mixing methyl vinyl silicone rubber, ethylene-octene copolymer and styrene-butadiene-styrene block copolymer in an internal mixer at 60 ℃ for 3min, adding mixed reinforcing material, white carbon black, talcum powder, plasticizer, polyethylene wax and antioxidant in the internal mixer, mixing at 100 ℃ for 10min, and standing at room temperature for 12h to obtain mixed rubber;
(3) Adding a vulcanizing agent and a vulcanization aid into the mixed rubber, mixing for 4min on an open mill, uniformly and then carrying out thin ventilation for 5 times, arranging the rubber, and then carrying out compression molding vulcanization molding and drying at the temperature of 140 ℃ for later use.
Example 2
The weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following raw materials in parts by mass:
100 parts of methyl vinyl silicone rubber, 40 parts of ethylene-octene copolymer, 10 parts of styrene-butadiene-styrene block copolymer, 8 parts of tetrapod-like zinc oxide whisker, 4 parts of acid modified PBO fiber, 20 parts of white carbon black, 4 parts of talcum powder, 3 parts of silane coupling agent, 4 parts of plasticizer, 2 parts of polyethylene wax, 1 part of antioxidant, 2 parts of vulcanizing agent and 0.5 part of auxiliary vulcanizing agent.
Wherein the methyl vinyl silicone rubber is a combination of methyl silicone rubber and vinyl silicone rubber; mass ratio of methyl terminated silicone rubber to vinyl terminated silicone rubber is 3:2. the length of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 10-50 mu m, and the diameter of the root is 0.5-5 mu m; the silane coupling agent is tetraethyl silicate; the plasticizer is dioctyl phthalate; the antioxidant is antioxidant 1010. The vulcanizing agent is dicumyl peroxide; the auxiliary vulcanizing agent is triallyl isocyanurate.
The preparation method of the weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following steps:
(1) Mixing a silane coupling agent, tetrapod-like zinc oxide whiskers and acid-modified PBO fibers in absolute ethyl alcohol according to a ratio, stirring and mixing for 40min (the dosage ratio of the silane coupling agent to the absolute ethyl alcohol is 3g:60 mL), washing after reaction, and drying at 60 ℃ to obtain a mixed reinforcing material;
(2) Mixing methyl vinyl silicone rubber, ethylene-octene copolymer and styrene-butadiene-styrene block copolymer in an internal mixer at 60 ℃ for 3min, adding mixed reinforcing material, white carbon black, talcum powder, plasticizer, polyethylene wax and antioxidant in the internal mixer, mixing at 100 ℃ for 10min, and standing at room temperature for 12h to obtain mixed rubber;
(3) Adding a vulcanizing agent and a vulcanization aid into the mixed rubber, mixing for 4min on an open mill, uniformly and then carrying out thin ventilation for 5 times, arranging the rubber, and then carrying out compression molding vulcanization molding and drying at the temperature of 140 ℃ for later use.
Example 3
The weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following raw materials in parts by mass:
100 parts of methyl vinyl silicone rubber, 30 parts of ethylene-octene copolymer, 20 parts of styrene-butadiene-styrene block copolymer, 6 parts of tetrapod-like zinc oxide whisker, 6 parts of acid modified PBO fiber, 20 parts of white carbon black, 4 parts of talcum powder, 3 parts of silane coupling agent, 4 parts of plasticizer, 2 parts of polyethylene wax, 1 part of antioxidant, 2 parts of vulcanizing agent and 0.5 part of auxiliary vulcanizing agent.
Wherein the methyl vinyl silicone rubber is a combination of methyl silicone rubber and vinyl silicone rubber; mass ratio of methyl terminated silicone rubber to vinyl terminated silicone rubber is 3:2. the length of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 10-50 mu m, and the diameter of the root is 0.5-5 mu m; the silane coupling agent is tetraethyl silicate; the plasticizer is dioctyl phthalate; the antioxidant is antioxidant 1010. The vulcanizing agent is dicumyl peroxide; the auxiliary vulcanizing agent is triallyl isocyanurate.
The preparation method of the weather-resistant torsion-resistant cable sheath material for wind power generation comprises the following steps:
(1) Mixing a silane coupling agent, tetrapod-like zinc oxide whiskers and acid-modified PBO fibers in absolute ethyl alcohol according to a ratio, stirring and mixing for 40min (the dosage ratio of the silane coupling agent to the absolute ethyl alcohol is 3g:60 mL), washing after reaction, and drying at 60 ℃ to obtain a mixed reinforcing material;
(2) Mixing methyl vinyl silicone rubber, ethylene-octene copolymer and styrene-butadiene-styrene block copolymer in an internal mixer at 60 ℃ for 3min, adding mixed reinforcing material, white carbon black, talcum powder, plasticizer, polyethylene wax and antioxidant in the internal mixer, mixing at 100 ℃ for 10min, and standing at room temperature for 12h to obtain mixed rubber;
(3) Adding a vulcanizing agent and a vulcanization aid into the mixed rubber, mixing for 4min on an open mill, uniformly and then carrying out thin ventilation for 5 times, arranging the rubber, and then carrying out compression molding vulcanization molding and drying at the temperature of 140 ℃ for later use.
Comparative example 1
The cable sheath material of comparative example 1 was substantially the same in composition and preparation process as in example 1, except that: in the cable sheath material of the comparative example, the methyl vinyl silicone rubber was a single terminal methyl silicone rubber 110-1, and no terminal vinyl silicone rubber was used.
Comparative example 2
The cable sheath material of comparative example 2 was substantially the same in composition and preparation process as in example 1, except that: in the cable sheath material of this comparative example, the amount of the styrene-butadiene-styrene block copolymer used was 5 parts.
Comparative example 3
The cable sheath material of comparative example 3 was substantially the same in composition and preparation process as in example 1, except that: the cable sheath material of the comparative example does not contain tetrapod-like zinc oxide whiskers and acid-modified PBO fibers, and the amount of white carbon black is increased to 32 parts.
Comparative example 4
The cable sheath material of comparative example 4 was substantially the same in composition and preparation process as in example 1, except that: in the cable sheath material of the comparative example, zinc oxide powder is used to replace tetrapod-like zinc oxide whiskers.
Comparative example 5
The cable sheath material of comparative example 5, which is substantially the same in composition and preparation process as in example 1, is different in that: in the cable sheath material of this comparative example, PBO fibers which were not acid-modified were directly used.
Performance testing
The compositions of the sheathing materials of examples 1 to 3 and comparative examples 1 to 5 are shown in table 1.
Table 1 raw material compositions and parts by weight of sheath materials of examples 1 to 3 and comparative examples 1 to 5
Figure SMS_1
The performances of the sheath materials prepared in examples 1 to 3 and comparative examples 1 to 5 were tested. Wherein, the hardness test is carried out according to GB/T531.1-2008, the tensile property is carried out according to GB/T528-2009, the brittleness temperature test is carried out according to GB/T1682-2014, the sea water resistance is carried out according to GB/T1690-2010, and the air aging resistance, the low temperature tensile test, the low temperature impact test and the low temperature torsion test are carried out according to the method of the standard TICW/01-2009.
Table 2 Properties of the sheath materials of examples 1 to 3 and comparative examples 1 to 5
Figure SMS_2
According to the test results, each performance of the cable sheath material provided by the invention can effectively meet the standard requirements of the wind power generation sheath material. Compared with the sheath materials in comparative examples 1-5, the special design of the resin matrix and the reinforcing system can significantly improve the requirements of the sheath materials on high temperature resistance, low temperature resistance and sea water resistance, and has excellent weather resistance. In addition, the low-temperature performance of the sheath material determines the service life of the cable to a great extent, and the sheath can be corroded and destroyed after cracking so that the cable is gradually lost. The sheath material provided by the invention also has excellent low-temperature impact resistance, embrittlement resistance and torsion resistance under the low-temperature condition, can greatly meet the use requirements of wind power generation cables, and effectively promotes the improvement of the service life of the cables. Therefore, the cable sheath material has wide application prospect in the field of wind power generation.

Claims (5)

1. The weather-resistant torsion-resistant cable sheath material for wind power generation is characterized by comprising the following raw materials in parts by weight:
100 parts of methyl vinyl silicone rubber, 30-40 parts of ethylene-octene copolymer, 10-20 parts of styrene-butadiene-styrene block copolymer, 5-8 parts of tetrapod-like zinc oxide whiskers, 4-6 parts of acid modified PBO fibers, 15-20 parts of white carbon black, 3-5 parts of talcum powder, 2-3 parts of silane coupling agent, 3-5 parts of plasticizer, 1-2 parts of polyethylene wax, 0.5-1.5 parts of antioxidant, 2-3 parts of vulcanizing agent and 0.5-1 part of auxiliary vulcanizing agent;
the methyl vinyl silicone rubber is a combination of methyl silicone rubber and vinyl silicone rubber; the mass ratio of the methyl-terminated silicone rubber to the vinyl-terminated silicone rubber is (3-4): (1-2); the length of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 10-50 mu m, and the diameter of the root is 0.5-5 mu m; the acid modified PBO fiber is prepared by modifying with concentrated nitric acid.
2. The weather-resistant torsion-resistant cable sheathing material for wind power generation according to claim 1, wherein the relative molecular weight of the methyl-terminated silicone rubber is 45-80 ten thousand, and the vinyl content is 0.07-0.12%; the relative molecular weight of the vinyl-terminated silicone rubber is 45-80 ten thousand, and the vinyl content is 0.13-0.20%.
3. The weather-resistant torsion-resistant cable sheathing material for wind power generation according to claim 1 or 2, wherein the silane coupling agent is one of tetraethyl silicate, (3-aminopropyl) triethoxysilane; the plasticizer is one of diethyl phthalate, dibutyl phthalate and dioctyl phthalate; the antioxidant is one of an antioxidant 545, an antioxidant 168 and an antioxidant 1010.
4. The weather-resistant torsion-resistant cable sheathing material for wind power generation according to claim 1 or 2, wherein the vulcanizing agent is dicumyl peroxide; the auxiliary vulcanizing agent is triallyl isocyanurate.
5. The method for preparing the weather-resistant torsion-resistant cable sheathing material for wind power generation according to claim 1, comprising the steps of:
(1) Stirring and mixing a silane coupling agent, tetrapod-like zinc oxide whiskers and acid-modified PBO fibers in absolute ethyl alcohol for 30-60 min, and washing and drying after reaction to obtain a mixed reinforcing material;
(2) Mixing methyl vinyl silicone rubber, an ethylene-octene copolymer and a styrene-butadiene-styrene block copolymer in an internal mixer at 60-70 ℃ for 2-4 min, adding a mixed reinforcing material, white carbon black, talcum powder, a plasticizer, polyethylene wax and an antioxidant, heating to 100-120 ℃ and mixing for 8-10 min, and then standing at room temperature for 8-12 h to obtain mixed rubber;
(3) Adding a vulcanizing agent and a vulcanization aid into the mixed glue, mixing for 3-5 minutes on an open mill, uniformly and then carrying out thin-pass for 3-5 times, and then carrying out compression molding vulcanization molding at 130-140 ℃ and drying to obtain the finished product.
CN202310392016.0A 2023-04-13 2023-04-13 Weather-resistant torsion-resistant cable sheath material for wind power generation and preparation method thereof Active CN116120751B (en)

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