CN112358719A - Reversible thermosensitive high-voltage incoming early-warning insulating protective sleeve material and preparation method thereof - Google Patents
Reversible thermosensitive high-voltage incoming early-warning insulating protective sleeve material and preparation method thereof Download PDFInfo
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- 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
- H01B3/30—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
- H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a reversible thermosensitive high-voltage incoming early-warning insulating protective sleeve material and a preparation method thereof, wherein the material is composed of the following raw materials in parts by weight: 20-40 parts of polyurethane, 2-10 parts of PDA/XCo-ZIF composite material, 25-50 parts of paraffin oil, 20-30 parts of octadecanol, 0.1-0.6 part of silane coupling agent, 5-10 parts of dispersant, 1-5 parts of vulcanizing agent and 8-12 parts of nano silicon dioxide. The method applies the PDA to the thermosensitive insulating sheath material for high-voltage incoming lines, not only solves the problem that the PDA is irreversible, but also realizes the early warning function in a higher temperature variation range.
Description
Technical Field
The invention relates to the field of preparation of insulating color-changing materials, in particular to a reversible thermosensitive high-voltage incoming early-warning insulating protective sleeve material and a preparation method thereof.
Background
The rubber material is a high polymer material capable of rapidly recovering deformation under large deformation, in recent years, rapid development of the rubber industry puts forward higher requirements on rubber products, the rubber material must develop towards functionalization, refinement and diversification, the traditional single rubber material cannot completely meet the rapidly-developed use requirements, and the technical problem can be solved by selecting and mixing multiple materials.
The insulating protective cover is made of high polymer materials and silicon rubber materials with strong ageing resistance, has the advantages of good toughness, strong hydrophobicity, ultraviolet resistance and the like, is suitable for terminal insulating safety protective equipment such as power equipment distribution transformers, lightning rods, outdoor switches and the like, and has the advantages of effectively preventing accidents such as power failure, power equipment damage, electric shock and the like caused by interphase paragraphs or grounding due to various reasons of various exposed terminals, thereby ensuring the safe operation of the power equipment. However, the common insulating rubber material cannot meet the current use requirements, and a reversible thermosensitive color-changing protective sleeve material which can be used for early warning and has a good insulating effect becomes a new requirement.
A high voltage transformer is a common electronic device for electronic products, and is an electromagnetic induction device for converting a low frequency and a low voltage into a low frequency and a high voltage. The conventional thermosensitive color-changing material for high-voltage incoming lines is usually a Schiff base color-changing material, but the Schiff base color-changing material can realize color change at a very low temperature due to low color-changing temperature, cannot be used when the requirement on the color-changing range of the temperature is slightly high, and has certain limitation.
With the progress of the times, polymer intelligent materials are widely applied in military, building, aerospace, medicine and other fields. Polydiacetylene (PDA) is an eneyne conjugated polymer with unique properties, and is obtained by topological polymerization of diacetylene monomers under the irradiation of ultraviolet light or gamma rays, wherein after the conjugated skeleton of the polydiacetylene is interfered by external stimulus (such as temperature change), the configuration and conformation of a main chain and a side chain are correspondingly changed, and the polydiacetylene per se shows blue-to-red color conversion, so that the polydiacetylene conjugated polymer can be used as a thermosensitive material. But the PDA can not recover the original blue color after the stimulation is removed, so that the PDA thermosensitive material can not be recycled, the application of polydiacetylene in the field of reversible thermosensitive sheath materials is blocked, and the problem to be solved at present is solved.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides the reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material and the preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 20-40 parts of polyurethane, 2-10 parts of PDA/XCo-ZIF composite material, 25-50 parts of paraffin oil, 20-30 parts of octadecanol, 0.1-0.6 part of silane coupling agent, 5-10 parts of dispersant, 1-5 parts of vulcanizing agent and 8-12 parts of nano silicon dioxide.
Preferably, the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, adding copper acetate and cobalt chloride hexahydrate, stirring for 5-10h, washing, and drying in vacuum to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed solution, performing ultrasonic treatment on the mixed solution at 60-70 ℃ for 50-100min, cooling to room temperature, and standing for 10-20h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 2-10min to obtain the PDA/XCo-ZIF composite material.
Preferably, the molar ratio of dimethylimidazole, copper acetate and cobalt chloride hexahydrate is 1-4: 2-5:1.
Preferably, the mass-volume ratio of the dimethyl imidazole to the triethylamine is 3-5: 1.
Preferably, the volume ratio of the dimethyl sulfoxide to the deionized water in the step S12 is 1: 2-10.
Preferably, the mass ratio of the diacetylene monomers to XCo-ZIF is 1-10: 1.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for uniform mixing, placing the premix into the internal mixer for mixing for 15-30min, and finally vulcanizing to obtain the protective sheath material.
Preferably, the mixing temperature is 105-120 ℃.
The invention applies the PDA to the thermosensitive early-warning insulating sheath material for the first time, and the disordered PDA conformation after heating can be restored to the initial ordered conformation arrangement after cooling by introducing the bimetallic organic framework XCo-ZIF and the interaction between the PDA and the XCo-ZIF, thereby rapidly restoring the composite material from red to blue. The invention adopts thermoplastic phenolic resin as a rubber matrix and organically combines with PDA/XCo-ZIF composite material through corresponding components and process conditions, the prepared sheath material is used for early warning of high-voltage incoming wires, and color change from blue at low temperature to red at high temperature effectively reminds inspectors, so that problems are found in time, and measures are taken to quickly eliminate hidden troubles. In addition, the preparation process is simple, the application range is wide, the highest early warning temperature can reach over 75 ℃, the potential danger can be reduced to the maximum extent, and the method has excellent industrialization prospect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will clearly and completely describe the embodiments of the present invention, and obviously, the described embodiments are a part of the embodiments of the present invention, but 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:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 40 parts of polyurethane, 10 parts of PDA/XCo-ZIF composite material, 50 parts of paraffin oil, 30 parts of octadecanol, 0.6 part of silane coupling agent, 10 parts of dispersing agent, 5 parts of vulcanizing agent and 12 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 4: 5:1, stirring for 10h, washing and vacuum drying to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 10:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:10, performing ultrasonic treatment on the mixed solution at 70 ℃ for 100min, cooling to room temperature, and standing for 20h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 10min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 120 ℃, placing the premix into the internal mixer for mixing for 30min, and finally vulcanizing to obtain the protective sleeve material.
Example 2:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 20 parts of polyurethane, 2 parts of PDA/XCo-ZIF composite material, 25 parts of paraffin oil, 20 parts of octadecanol, 0.1 part of silane coupling agent, 5 parts of dispersant, 1 part of vulcanizing agent and 8 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 1: 2:1, stirring for 5h, washing and vacuum drying to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 1:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:2, performing ultrasonic treatment on the mixed solution at 60 ℃ for 50min, cooling to room temperature, and standing for 10h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 2min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 105 ℃, placing the premix into the internal mixer for mixing for 15min, and finally vulcanizing to obtain the protective sleeve material.
Example 3:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 30 parts of polyurethane, 6 parts of PDA/XCo-ZIF composite material, 40 parts of paraffin oil, 25 parts of octadecanol, 0.3 part of silane coupling agent, 7 parts of dispersant, 3 parts of vulcanizing agent and 10 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3-5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 2: 3:1, stirring for 7h, washing and vacuum drying to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 5:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:6, performing ultrasonic treatment on the mixed solution at 65 ℃ for 75min, cooling to room temperature, and standing for 15h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 6min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 110 ℃, placing the premix into the internal mixer for mixing for 20min, and finally vulcanizing to obtain the protective sleeve material.
Example 4:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 25 parts of polyurethane, 2 parts of PDA/XCo-ZIF composite material, 30 parts of paraffin oil, 20 parts of octadecanol, 0.2 part of silane coupling agent, 7 parts of dispersant, 2 parts of vulcanizing agent and 9 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3.5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 1.3: 4:1, stirring for 6h, washing and vacuum drying to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 2:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:3, subjecting the mixed solution to ultrasonic treatment at 63 ℃ for 55min, cooling to room temperature, and standing for 12h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 4min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for uniform mixing at the mixing temperature of 115 ℃, placing the premix into the internal mixer for mixing for 20min, and finally vulcanizing to obtain the protective sleeve material.
Example 5:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 24 parts of polyurethane, 4 parts of PDA/XCo-ZIF composite material, 28 parts of paraffin oil, 23 parts of octadecanol, 0.4 part of silane coupling agent, 7 parts of dispersant, 1.5 parts of vulcanizing agent and 11 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3.5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 1.4: 2.5:1, stirring for 6h, washing and drying in vacuum to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 4:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:6, performing ultrasonic treatment on the mixed solution at 64 ℃ for 60min, cooling to room temperature, and standing for 14h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 6min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 108 ℃, placing the premix into the internal mixer for mixing for 19min, and finally vulcanizing to obtain the protective sleeve material.
Example 6:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 27 parts of polyurethane, 8 parts of PDA/XCo-ZIF composite material, 30 parts of paraffin oil, 26 parts of octadecanol, 0.5 part of silane coupling agent, 8 parts of dispersant, 2.5 parts of vulcanizing agent and 11 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3.8:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 2.5: 2.5:1, stirring for 9h, washing and drying in vacuum to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 7:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:8, performing ultrasonic treatment on the mixed solution at 67 ℃ for 80min, cooling to room temperature, and standing for 16h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 8min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 110 ℃, placing the premix into the internal mixer for mixing for 19min, and finally vulcanizing to obtain the protective sleeve material.
Example 7:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 21 parts of polyurethane, 2.5 parts of PDA/XCo-ZIF composite material, 31 parts of paraffin oil, 20 parts of octadecanol, 0.2 part of silane coupling agent, 7 parts of dispersing agent, 2.6 parts of vulcanizing agent and 9 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3.3:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 1.6: 4:1, stirring for 6h, washing and vacuum drying to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 2.5:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:3.6, subjecting the mixed solution to ultrasonic treatment at 62 ℃ for 55min, cooling to room temperature, and standing for 13h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 4min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for uniform mixing at the mixing temperature of 111 ℃, placing the premix into the internal mixer for mixing for 20min, and finally vulcanizing to obtain the protective sleeve material.
Example 8:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 27 parts of polyurethane, 4.5 parts of PDA/XCo-ZIF composite material, 27 parts of paraffin oil, 26 parts of octadecanol, 0.45 part of silane coupling agent, 7.4 parts of dispersing agent, 1.8 parts of vulcanizing agent and 11 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 4.5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 1.4: 2.7:1, stirring for 6.5h, washing and drying in vacuum to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed solution, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 4:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:6, performing ultrasonic treatment on the mixed solution at 66 ℃ for 60min, cooling to room temperature, and standing for 16h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 6min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for mixing uniformly at the mixing temperature of 118 ℃, placing the premix into the internal mixer for mixing for 19min, and finally vulcanizing to obtain the protective sleeve material.
Example 9:
a reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is composed of the following raw materials in parts by weight: 29 parts of polyurethane, 6 parts of PDA/XCo-ZIF composite material, 40 parts of paraffin oil, 26.5 parts of octadecanol, 0.35 part of silane coupling agent, 7.6 parts of dispersing agent, 3.3 parts of vulcanizing agent and 11.3 parts of nano silicon dioxide, wherein the preparation method of the PDA/XCo-ZIF composite material comprises the following steps:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, wherein the mass volume ratio of dimethyl imidazole to triethylamine is 3.5:1, adding copper acetate and cobalt chloride hexahydrate, and the molar ratio of dimethyl imidazole to copper acetate to cobalt chloride hexahydrate is 2.1: 3.3:1, stirring for 7h, washing and drying in vacuum to obtain the XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed liquid, wherein the mass ratio of the diacetylene monomer to the XCo-ZIF is 5.5:1, and the volume ratio of the dimethyl sulfoxide to the deionized water is 1:6, subjecting the mixed solution to ultrasonic treatment at 65 ℃ for 77min, cooling to room temperature, and standing for 15h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 6min to obtain the PDA/XCo-ZIF composite material.
A preparation method of a reversible thermosensitive high-voltage incoming line early-warning insulating protective sleeve material comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for uniform mixing at the mixing temperature of 113 ℃, placing the premix into the internal mixer for mixing for 21min, and finally vulcanizing to obtain the protective sleeve material.
Test example:
the reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve prepared in examples 1 to 9 was placed in a watch glass, and after being placed in a constant temperature water bath, the water bath was set to raise the temperature from 25 ℃ at a temperature raising rate of 2 ℃/5min, and the color change was observed while raising the temperature, and when the color change occurred in the reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve, the temperature of the reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve was measured with an infrared thermometer, and the first discoloration temperature was recorded, and then the temperature was again raised repeatedly after cooling to observe the second discoloration temperature. The results are shown in table 1:
table 1 examples 1-9 samples discoloration temperature test results:
| item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 |
| First color change temperature DEG C | 75 | 79 | 85 | 84 | 80 | 81 | 76 | 77 | 80 |
| Second color change temperature deg.C | 74 | 78 | 86 | 84 | 80 | 82 | 77 | 77 | 80.5 |
According to test data, the sheath material in each embodiment of the invention realizes an early warning function in a high temperature change range, and has reversibility.
The reversible thermosensitive high-voltage incoming line early warning insulating protective sheath material prepared in the embodiments 1 to 9 is subjected to comprehensive performance test, and the test results are shown in table 2:
table 2 examples 1-9 sample insulation performance test results:
| item | Resistivity 1010 (Ω cm) |
| Example 1 | 3.05 |
| Example 2 | 3.04 |
| Example 3 | 3.00 |
| Example 4 | 2.48 |
| Example 5 | 3.04 |
| Example 6 | 3.21 |
| Example 7 | 3.34 |
| Example 8 | 3.15 |
| Example 9 | 2.98 |
As can be seen from the data in the table, the sheath material obtained by the invention has excellent insulating property.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material is characterized by comprising the following raw materials in parts by weight: 20-40 parts of polyurethane, 2-10 parts of PDA/XCo-ZIF composite material, 25-50 parts of paraffin oil, 20-30 parts of octadecanol, 0.1-0.6 part of silane coupling agent, 5-10 parts of dispersant, 1-5 parts of vulcanizing agent and 8-12 parts of nano silicon dioxide.
2. The reversible thermosensitive high-voltage incoming line early warning insulating and protecting sheathing material as claimed in claim 1, wherein the preparation method of the PDA/XCo-ZIF composite material is as follows:
s11, dissolving triethylamine and dimethyl imidazole in ethanol, adding copper acetate and cobalt chloride hexahydrate, stirring for 5-10h, washing, and drying in vacuum to obtain XCo-ZIF;
s12, dispersing the XCo-ZIF in deionized water to form a dispersion liquid, adding dimethyl sulfoxide into the dispersion liquid, uniformly mixing, adding a diacetylene monomer to obtain a mixed solution, performing ultrasonic treatment on the mixed solution at 60-70 ℃ for 50-100min, cooling to room temperature, and standing for 10-20h to obtain a white suspension;
and S13, placing the white suspension under ultraviolet light with the wavelength of 289nm for irradiation polymerization for 2-10min to obtain the PDA/XCo-ZIF composite material.
3. The reversible thermosensitive high-voltage incoming line early warning insulating and protecting jacket material as claimed in claim 2, wherein the molar ratio of the dimethylimidazole to the copper acetate to the cobalt chloride hexahydrate is 1-4: 2-5:1.
4. The reversible thermosensitive high-voltage incoming line early warning insulating protective sleeve material as claimed in claim 2, wherein the mass-volume ratio of the dimethyl imidazole to the triethylamine is 3-5: 1.
5. The reversible thermosensitive high-voltage incoming line early warning insulating and protecting sheathing material as claimed in claim 2, wherein the volume ratio of dimethyl sulfoxide to deionized water in step S12 is 1: 2-10.
6. The reversible thermosensitive high-voltage incoming line early warning insulating and protecting sheathing compound as claimed in any one of claims 1 to 5, wherein the mass ratio of diacetylene monomer to XCo-ZIF is 1-10: 1.
7. The preparation method of the reversible thermosensitive high-voltage incoming line early warning insulating and protecting sheathing material as claimed in claim 6, wherein the method comprises the following steps:
s21, uniformly mixing the PDA/XCo-ZIF composite material, octadecanol and a dispersing agent to obtain a premix;
s22, placing the polyurethane, the nano-silica, the paraffin oil and the vulcanizing agent into an internal mixer for uniform mixing, placing the premix into the internal mixer for mixing for 15-30min, and finally vulcanizing to obtain the protective sheath material.
8. The method for preparing the reversible thermosensitive high-voltage incoming line early warning insulating protective sheath material as claimed in claim 7, wherein the mixing temperature is 105-120 ℃.
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