CN112812438A - Self-repairing optical cable and preparation method thereof - Google Patents
Self-repairing optical cable and preparation method thereof Download PDFInfo
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
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- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
- C08F255/04—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
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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
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- C08L2205/00—Polymer mixtures characterised by other features
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention provides a self-repairing optical cable which comprises a cable core and a sheath, wherein the sheath is prepared from the following raw materials: ethylene/propylene blend, low-density polyethylene, polypropylene, antioxidant, light stabilizer, flame retardant and self-repairing microcapsule. The self-repairing optical cable prepared by the invention takes the ethylene/propylene blend, the low-density polyethylene and the polypropylene as the base materials, so that the material is ensured to have good mechanical property and heat resistance, the toughness of the reinforced material is improved by adding the self-repairing microcapsule, the self-repairing property of the material is improved, the damage and the crack generated in the practical application of the material are effectively repaired, the self-repairing microcapsule is further toughened and modified, the mechanical properties of the material such as bending property and tensile property are further improved, the brittleness of the material is reduced, the damage of an external force to the optical cable material is reduced, and the application range of the material is improved.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a self-repairing optical cable and a preparation method thereof.
Background
The 21 st century is the century of electronic information, and the communication network is rapidly developing, but the realization of high-speed communication cannot leave high-performance optical cable materials. In order to meet the use requirements of different use environments, particularly severe environments, the cable core needs to be coated with materials with different structures. The optical cable reinforced core is a key material of the optical cable in the construction and application processes. The existing reinforcing material is usually irreversible once damaged by external force, generates permanent damage to the optical cable and can not realize self-repair, thereby greatly influencing the service life of the optical cable, improving the cost of the operation industry and causing the waste of resources.
Disclosure of Invention
The invention aims to provide a self-repairing optical cable and a preparation method thereof, wherein an ethylene/propylene blend, low-density polyethylene and polypropylene are used as base materials, so that the materials are ensured to have good mechanical properties and heat resistance, the toughness of a reinforced material is improved by adding self-repairing microcapsules, the self-repairing performance of the material is improved by the self-repairing microcapsules, damage and cracks generated in the practical application of the material are effectively repaired, the self-repairing microcapsules are further toughened and modified, the mechanical properties such as bending property and tensile property of the material are further improved, the brittleness of the material is reduced, the damage of an external force to the optical cable material is reduced, and the application range of the material is improved.
The technical scheme of the invention is realized as follows:
the invention provides a self-repairing optical cable which comprises a cable core and a sheath, wherein the sheath is prepared from the following raw materials: ethylene/propylene blend, low-density polyethylene, polypropylene, antioxidant, light stabilizer, flame retardant and self-repairing microcapsule.
As a further improvement of the invention, the sheath material is prepared from the following raw materials in parts by weight: 150 parts of ethylene/propylene blend, 70-120 parts of low-density polyethylene, 200 parts of polypropylene, 1-5 parts of antioxidant, 1-3 parts of light stabilizer, 2-5 parts of flame retardant and 10-20 parts of self-repairing microcapsule.
As a further improvement of the invention, the sheath material is prepared from the following raw materials in parts by weight: 130 parts of ethylene/propylene blend material, 90-100 parts of low-density polyethylene, 180 parts of polypropylene, 2-4 parts of antioxidant, 1.5-2.5 parts of light stabilizer, 3-4 parts of flame retardant and 12-18 parts of self-repairing microcapsule.
As a further improvement of the invention, the self-repairing microcapsule is prepared by the following method: dissolving a surfactant in water, adding graphene oxide under the stirring condition of 40-50 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving polyethylene resin in ethanol, and stirring and mixing uniformly at 45-55 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 1-2h at 55-70 ℃ and 700r/min under 400 ℃, adding methacrylic acid monomer and 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding curing agent triethylene tetramine, continuously reacting for 2-4h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule.
As a further improvement of the invention, the surfactant is selected from one or a mixture of more of tween-80, span-80, carbomer, sodium dodecyl benzene sulfonate, fatty glyceride, lecithin and sodium stearate; the mass ratio of the surfactant to the graphene oxide to the polyethylene resin to the methacrylic acid monomer to the 2-methylimidazole to the triethylene tetramine is (0.2-0.7): (5-10): (10-15): (3-7): (1-2): (1-3).
As a further improvement of the invention, the self-repairing microcapsule is toughened and modified by the following steps:
s1, adding the self-repairing microcapsule into 2.5-5 wt% of silane coupling agent solution, uniformly dispersing, heating to 70-90 ℃, reacting for 1-3h, and filtering to obtain a surface-treated self-repairing microcapsule;
s2, dissolving chloroprene rubber in tetrahydrofuran, adding the surface-treated self-repairing microcapsule prepared in the step S1, heating to 50-70 ℃, reacting for 1-2h, filtering, and washing with water and ethanol to obtain the toughened and modified self-repairing microcapsule.
As a further improvement of the invention, the silane coupling agent is selected from one or a mixture of more of KH550, KH560, KH570, KH580, KH602 and KH 792; the mass ratio of the self-repairing microcapsule to the chloroprene rubber is 100: (10-20).
As a further improvement of the invention, the antioxidant is selected from one or more of 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, didodecanol ester, dimyristyl ester, dioctadecyl ester, trioctyl ester, tridecyl ester, tridodecyl ester and trihexadecyl ester; the light stabilizer is selected from one or a mixture of more of 2,2 '-thiobis (4-tert-octylphenoloxy) nickel, tris (1,2,2,6, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, 2,4, 6-tris (2' n-butoxyphenyl) -1,3, 5-triazine and hexamethylphosphoric triamide; the flame retardant is selected from one or a mixture of more of magnesium hydroxide, aluminum hydroxide, TDCPP, ammonium polyphosphate, octabromoether, triphenyl phosphate, hexabromocyclododecane, MPP, zinc borate, decabromodiphenylethane, coated red phosphorus and TBC.
The invention further provides a preparation method of the self-repairing optical cable, which comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, an antioxidant, a light stabilizer, a flame retardant and a self-repairing microcapsule into a double-screw extruder according to a ratio for mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
As a further improvement of the invention, the four temperature sections in the mixing and extruding process are as follows: the feeding section 115-120 ℃, the conveying section 125-135 ℃, the melting section 135-145 ℃ and the extrusion section 145-155 ℃.
The invention has the following beneficial effects: the invention has prepared a kind of microcapsule, prepared the wall material is polyethylene/graphene oxide resin, coat the core material as acrylic acid monomer and latent type firming agent 2-methylimidazole microcapsule, pack it into optical cable material, when generating the microcrack in the matrix, under the external force, impel the microcapsule to break, the repair liquid flowing out from it is filled the crack rapidly by the capillary siphon action, contact with branched chain of the matrix polymer and take place the cross-linking polyreaction, the highly cross-linked polymer binds the surface of the microcrack, achieve and repair the goal, meanwhile, contain the acrylic resin of the viscidity in the repair liquid, can bind the crack physically, make the matrix material repair rapidly from chemistry and physics two aspects, avoid causing the irreversible damage to the optical cable material under the external force, and it is little to influence the mechanical property of the optical cable material;
the self-repairing microcapsule is further modified and coupled with a toughening agent chloroprene rubber to obtain polyethylene/graphene oxide resin with the surface modified by the toughening agent chloroprene rubber, the principle is that chlorine atoms in the chloroprene rubber react with hydroxyl groups in graphene oxide to realize bonding, the resin is used as a wall material and added into an optical cable material, and after the resin is fully distributed, the toughness of the material can be further improved, so that the mechanical properties of the material, such as bending property and tensile property, are improved, the brittleness of the material is reduced, the damage of external force to the optical cable material is reduced, and the application range of the material is improved.
The self-repairing optical cable prepared by the invention takes the ethylene/propylene blend, the low-density polyethylene and the polypropylene as the base materials, so that the material is ensured to have good mechanical property and heat resistance, the toughness of the reinforced material is improved by adding the self-repairing microcapsule, the self-repairing property of the material is improved, the damage and the crack generated in the practical application of the material are effectively repaired, the self-repairing microcapsule is further toughened and modified, the mechanical properties of the material such as bending property and tensile property are further improved, the brittleness of the material is reduced, the damage of an external force to the optical cable material is reduced, and the application range of the material is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Preparation example 1 self-repairing microcapsules
The preparation method comprises the following steps:
dissolving 0.2g of carbomer in 100mL of water, adding 5g of graphene oxide under the condition of stirring at 40 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving 10g of polyethylene resin in ethanol, and stirring and mixing uniformly at 45 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 1h at 55 ℃ and 400r/min, adding 3g of methacrylic acid monomer and 1g of 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding 1g of curing agent triethylene tetramine, continuously reacting for 2h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule.
Preparation example 2 self-repairing microcapsules
The preparation method comprises the following steps:
dissolving 0.7g of tween-80 in 100mL of water, adding 10g of graphene oxide under the stirring condition at 50 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving 15g of polyethylene resin in ethanol, and stirring and mixing uniformly at 55 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 2h at 70 ℃ and 700r/min, adding 7g of methacrylic acid monomer and 2g of 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding 3g of curing agent triethylene tetramine, continuously reacting for 4h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule.
Preparation example 3 toughening modified self-repairing microcapsule
The preparation method comprises the following steps:
s1, dissolving 0.7g of Tween-80 in 100mL of water, adding 10g of graphene oxide under the stirring condition at 50 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving 15g of polyethylene resin in ethanol, and stirring and mixing uniformly at 55 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 2h at 70 ℃ and 700r/min, adding 7g of methacrylic acid monomer and 2g of 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding 3g of curing agent triethylene tetramine, continuously reacting for 4h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule;
s2, adding the self-repairing microcapsule into 100mL of 2.5 wt% silane coupling agent KH570 solution, uniformly dispersing, heating to 70 ℃, reacting for 1h, and filtering to obtain a surface-treated self-repairing microcapsule;
s3, dissolving 10g of chloroprene rubber in 200mL of tetrahydrofuran, adding 100g of the surface-treated self-repairing microcapsule prepared in the step S2, heating to 50 ℃, reacting for 1h, filtering, and washing with water and ethanol to obtain the toughened and modified self-repairing microcapsule.
Preparation example 4 toughening modified self-repairing microcapsule
The preparation method comprises the following steps:
s1, dissolving 0.7g of Tween-80 in 100mL of water, adding 10g of graphene oxide under the stirring condition at 50 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving 15g of polyethylene resin in ethanol, and stirring and mixing uniformly at 55 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 2h at 70 ℃ and 700r/min, adding 7g of methacrylic acid monomer and 2g of 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding 3g of curing agent triethylene tetramine, continuously reacting for 4h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule;
s2, adding the self-repairing microcapsule into 100mL of 5 wt% silane coupling agent KH550 solution, uniformly dispersing, heating to 90 ℃, reacting for 3h, and filtering to obtain a surface-treated self-repairing microcapsule;
s3, dissolving 20g of chloroprene rubber in 200mL of tetrahydrofuran, adding 100g of the surface-treated self-repairing microcapsule prepared in the step S2, heating to 70 ℃, reacting for 2 hours, filtering, and washing with water and ethanol to obtain the toughened and modified self-repairing microcapsule.
Example 1
The raw materials comprise the following components in parts by weight: 100 parts of ethylene/propylene blend, 70 parts of low-density polyethylene, 100 parts of polypropylene, 1 part of bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, 1 part of 2,2' -thiobis (4-tertiary octylphenoloxy) nickel, 2 parts of ammonium polyphosphate and 10 parts of self-repairing microcapsule prepared in preparation example 1.
The preparation method comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, 2' -thiobis (4-tertiary octylphenoloxy) nickel, ammonium polyphosphate and self-repairing microcapsules into a double-screw extruder according to a ratio, and mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable sheath material;
the four temperature sections in the mixing extrusion process are as follows: the charging section is 115 ℃, the conveying section is 125 ℃, the melting section is 135 ℃, and the extrusion section is 145 ℃;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
Example 2
The raw materials comprise the following components in parts by weight: 150 parts of ethylene/propylene blend, 120 parts of low-density polyethylene, 200 parts of polypropylene, 5 parts of trioctyl ester, 3 parts of 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, 5 parts of triphenyl phosphate and 20 parts of self-repairing microcapsules prepared in preparation example 1.
The preparation method comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, trioctyl ester, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, triphenyl phosphate and a self-repairing microcapsule into a double-screw extruder according to a ratio, and mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable sheath material;
the four temperature sections in the mixing extrusion process are as follows: the charging section is 120 ℃, the conveying section is 135 ℃, the melting section is 145 ℃ and the extrusion section is 155 ℃;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
Example 3
The raw materials comprise the following components in parts by weight: 120 parts of ethylene/propylene blend, 90 parts of low-density polyethylene, 120 parts of polypropylene, 2 parts of tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 1.5 parts of hexamethylphosphoric triamide, 3 parts of decabromodiphenylethane and 12 parts of self-repairing microcapsules prepared in preparation example 2.
The preparation method comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, hexamethyl phosphoric triamide, decabromodiphenylethane and self-repairing microcapsules into a double-screw extruder according to a ratio, and mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable sheath material;
the four temperature sections in the mixing extrusion process are as follows: the feeding section is 116 ℃, the conveying section is 127 ℃, the melting section is 137 ℃ and the extrusion section is 147 ℃;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
Example 4
The raw materials comprise the following components in parts by weight: 130 parts of ethylene/propylene blend, 100 parts of low-density polyethylene, 180 parts of polypropylene, 4 parts of trioctyl ester, 2.5 parts of 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, 4 parts of coated red phosphorus and 18 parts of self-repairing microcapsule prepared in preparation example 2.
The preparation method comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, trioctyl ester, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, coated red phosphorus and self-repairing microcapsules into a double-screw extruder according to a ratio, and mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable sheath material;
the four temperature sections in the mixing extrusion process are as follows: the feeding section is 119 ℃, the conveying section is 132 ℃, the melting section is 142 ℃ and the extrusion section is 152 ℃;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
Example 5
The raw materials comprise the following components in parts by weight: 125 parts of ethylene/propylene blend, 95 parts of low-density polyethylene, 150 parts of polypropylene, 3 parts of 2, 6-tertiary butyl-4-methylphenol, 2 parts of tris (1,2,2,6, 6-pentamethylpiperidinyl) phosphite, 3.5 parts of decabromodiphenylethane and 15 parts of self-repairing microcapsule prepared in preparation example 2.
The preparation method comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, 2, 6-tertiary butyl-4-methylphenol, tris (1,2,2,6, 6-pentamethylpiperidinyl) phosphite, decabromodiphenylethane and a self-repairing microcapsule into a double-screw extruder according to a ratio for mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable sheath material;
the four temperature sections in the mixing extrusion process are as follows: the feeding section is 117 ℃, the conveying section is 130 ℃, the melting section is 140 ℃ and the extrusion section is 150 ℃;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
Example 6
Compared with the embodiment 5, the self-repairing microcapsule prepared in the preparation example 2 is replaced by the toughening modified self-repairing microcapsule prepared in the preparation example 3, and other conditions are not changed.
Example 7
Compared with the embodiment 5, the self-repairing microcapsule prepared in the preparation example 2 is replaced by the toughening modified self-repairing microcapsule prepared in the preparation example 4, and other conditions are not changed.
Test example 1
The self-repair optical cables for optical cables obtained in examples 1 to 7 and commercially available self-repair optical cables were subjected to a self-repair performance test.
The specific operation is as follows: and (3) marking a crack on the surface of the sample by using a blade, wherein the length of the crack is 10cm, the width of the crack is more than 500 mu m, the crack is repaired for 24h at normal temperature, and the repair rate is calculated by comparing the Young modulus, the elongation at break and the breaking stress of the repaired material with the performance data of the original material.
The results are shown in Table 1.
TABLE 1
From the performance test results, the self-repairing optical cable greatly improves the self-repairing performance of the material by adding the self-repairing microcapsules, and meanwhile, the mechanical property, the elongation at break, the tensile strength and the Young modulus repairing rate of the material can be obviously improved by adding the toughening modified self-repairing microcapsules.
Compared with the embodiment 5, the embodiments 6 and 7 respectively add the toughening modified self-repairing microcapsule, the mechanical property and the self-repairing property of which are obviously improved, modify the self-repairing microcapsule, couple the self-repairing microcapsule with the toughening agent chloroprene rubber to obtain the polyethylene/graphene oxide resin with the surface modified by the toughening agent chloroprene rubber, and the principle is that chlorine atoms in the chloroprene rubber react with hydroxyl groups in the graphene oxide to realize bonding, the resin is taken as a wall material and added into the optical cable material to be fully distributed, so that the toughness of the material can be further improved, the mechanical properties of the material such as bending property and tensile property are improved, the brittleness of the material is reduced, the damage of external force to the optical cable material is reduced, the application range of the material is improved, meanwhile, the repairing property of the self-repairing microcapsule is obviously improved, and under the existence of the toughening agent chloroprene rubber, when the material is damaged by the external force, the microcapsule shell breaking release is facilitated, the acrylic acid monomer and the latent curing agent 2-methylimidazole microcapsule are released, the microcapsule is promoted to break, the repairing liquid flowing out of the microcapsule quickly fills the crack under the action of capillary siphonage, the repairing liquid is in contact with the branched chain of the matrix polymer to generate a cross-linking polymerization reaction, the highly cross-linked polymer bonds the surface of the microcrack to achieve the aim of repairing, meanwhile, the repairing liquid contains viscous acrylic resin and can physically bond the crack, so that the matrix material can be quickly repaired from both chemical and physical aspects, and the irreversible damage to the cable material under the action of external force is avoided.
Compared with the prior art, the invention prepares the microcapsule, the wall material is polyethylene/graphene oxide resin, the coating core material is acrylic acid monomer and the latent curing agent 2-methylimidazole microcapsule are filled into the optical cable material, when the micro-crack is generated in the matrix, the micro-capsule is promoted to break under the action of external force, the repairing liquid flowing out of the micro-capsule is quickly filled in the crack under the action of capillary siphon, the polymer is contacted with the branched chain of the matrix polymer to generate cross-linking polymerization reaction, the highly cross-linked polymer bonds the surface of the microcrack to achieve the aim of repairing, meanwhile, the repairing liquid contains viscous acrylic resin, so that cracks can be physically bonded, the base material can be rapidly repaired from the chemical aspect and the physical aspect, the irreversible damage to the cable material under the action of external force is avoided, and the influence on the mechanical property of the cable material is small;
the self-repairing microcapsule is further modified and coupled with a toughening agent chloroprene rubber to obtain polyethylene/graphene oxide resin with the surface modified by the toughening agent chloroprene rubber, the principle is that chlorine atoms in the chloroprene rubber react with hydroxyl groups in graphene oxide to realize bonding, the resin is used as a wall material and added into an optical cable material, and after the resin is fully distributed, the toughness of the material can be further improved, so that the mechanical properties of the material, such as bending property and tensile property, are improved, the brittleness of the material is reduced, the damage of external force to the optical cable material is reduced, and the application range of the material is improved.
The self-repairing optical cable prepared by the invention takes the ethylene/propylene blend, the low-density polyethylene and the polypropylene as the base materials, so that the material is ensured to have good mechanical property and heat resistance, the toughness of the reinforced material is improved by adding the self-repairing microcapsule, the self-repairing property of the material is improved, the damage and the crack generated in the practical application of the material are effectively repaired, the self-repairing microcapsule is further toughened and modified, the mechanical properties of the material such as bending property and tensile property are further improved, the brittleness of the material is reduced, the damage of an external force to the optical cable material is reduced, and the application range of the material is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The self-repairing optical cable is characterized by comprising a cable core and a sheath, wherein the sheath is prepared from the following raw materials: ethylene/propylene blend, low-density polyethylene, polypropylene, antioxidant, light stabilizer, flame retardant and self-repairing microcapsule.
2. The self-repairing optical cable according to claim 1, wherein the sheath material is prepared from the following raw materials in parts by weight: 150 parts of ethylene/propylene blend, 70-120 parts of low-density polyethylene, 200 parts of polypropylene, 1-5 parts of antioxidant, 1-3 parts of light stabilizer, 2-5 parts of flame retardant and 10-20 parts of self-repairing microcapsule.
3. The self-repairing optical cable according to claim 2, wherein the sheath material is prepared from the following raw materials in parts by weight: 130 parts of ethylene/propylene blend material, 90-100 parts of low-density polyethylene, 180 parts of polypropylene, 2-4 parts of antioxidant, 1.5-2.5 parts of light stabilizer, 3-4 parts of flame retardant and 12-18 parts of self-repairing microcapsule.
4. The self-repairing optical cable of claim 1, wherein the self-repairing microcapsules are prepared by the following method: dissolving a surfactant in water, adding graphene oxide under the stirring condition of 40-50 ℃, and uniformly stirring and dispersing to obtain a solution A; dissolving polyethylene resin in ethanol, and stirring and mixing uniformly at 45-55 ℃ to obtain a solution B; mixing the solution A and the solution B while hot, emulsifying for 1-2h at 55-70 ℃ and 700r/min under 400 ℃, adding methacrylic acid monomer and 2-methylimidazole, stirring and mixing uniformly, slowly dropwise adding curing agent triethylene tetramine, continuously reacting for 2-4h after the dropwise adding of the curing agent is finished, quickly cooling to room temperature after the reaction is finished, carrying out suction filtration, washing the solid with distilled water and ethanol in sequence, and drying to obtain the self-repairing microcapsule.
5. The self-repairing optical cable according to claim 4, wherein the surfactant is one or more of tween-80, span-80, carbomer, sodium dodecyl benzene sulfonate, fatty glyceride, lecithin and sodium stearate; the mass ratio of the surfactant to the graphene oxide to the polyethylene resin to the methacrylic acid monomer to the 2-methylimidazole to the triethylene tetramine is (0.2-0.7): (5-10): (10-15): (3-7): (1-2): (1-3).
6. The self-repairing optical cable of claim 4, wherein the self-repairing microcapsules are subjected to toughening modification by the following method:
s1, adding the self-repairing microcapsule into 2.5-5 wt% of silane coupling agent solution, uniformly dispersing, heating to 70-90 ℃, reacting for 1-3h, and filtering to obtain a surface-treated self-repairing microcapsule;
s2, dissolving chloroprene rubber in tetrahydrofuran, adding the surface-treated self-repairing microcapsule prepared in the step S1, heating to 50-70 ℃, reacting for 1-2h, filtering, and washing with water and ethanol to obtain the toughened and modified self-repairing microcapsule.
7. The self-healing optical cable of claim 6, wherein the silane coupling agent is selected from one or a mixture of KH550, KH560, KH570, KH580, KH602 and KH 792; the mass ratio of the self-repairing microcapsule to the chloroprene rubber is 100: (10-20).
8. The self-repairing optical cable according to claim 1, wherein the antioxidant is selected from one or more of 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) sulfide, tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, didodecanol ester, dimyristyl alcohol ester, and dioctadecyl alcohol ester, trioctyl ester, tridecyl ester, tridodecyl ester and trihexadecyl ester; the light stabilizer is selected from one or a mixture of more of 2,2 '-thiobis (4-tert-octylphenoloxy) nickel, tris (1,2,2,6, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, 2,4, 6-tris (2' n-butoxyphenyl) -1,3, 5-triazine and hexamethylphosphoric triamide; the flame retardant is selected from one or a mixture of more of magnesium hydroxide, aluminum hydroxide, TDCPP, ammonium polyphosphate, octabromoether, triphenyl phosphate, hexabromocyclododecane, MPP, zinc borate, decabromodiphenylethane, coated red phosphorus and TBC.
9. The preparation method of the self-repairing optical cable as claimed in any one of claims 1 to 8, which comprises the following steps:
s1, adding an ethylene/propylene blend, low-density polyethylene, polypropylene, an antioxidant, a light stabilizer, a flame retardant and a self-repairing microcapsule into a double-screw extruder according to a ratio for mixing and extruding;
s2, conveying the material obtained in the step S1 to a single-screw extruder for extrusion granulation to obtain a self-repairing optical cable;
and S3, wrapping the self-repairing optical cable sheath material obtained in the step S2 outside the cable core to obtain the self-repairing optical cable.
10. The preparation method according to claim 9, wherein the four temperature sections in the mixing and extruding process are: the feeding section 115-120 ℃, the conveying section 125-135 ℃, the melting section 135-145 ℃ and the extrusion section 145-155 ℃.
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| CN202110083912.XA CN112812438A (en) | 2021-01-21 | 2021-01-21 | Self-repairing optical cable and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185761A (en) * | 2021-05-28 | 2021-07-30 | 国网河南省电力公司西峡县供电公司 | Preparation method of cable insulating material with self-repairing function |
| CN116009173A (en) * | 2023-03-29 | 2023-04-25 | 江苏中天科技股份有限公司 | Optical cable |
-
2021
- 2021-01-21 CN CN202110083912.XA patent/CN112812438A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185761A (en) * | 2021-05-28 | 2021-07-30 | 国网河南省电力公司西峡县供电公司 | Preparation method of cable insulating material with self-repairing function |
| CN116009173A (en) * | 2023-03-29 | 2023-04-25 | 江苏中天科技股份有限公司 | Optical cable |
| CN116009173B (en) * | 2023-03-29 | 2023-07-14 | 江苏中天科技股份有限公司 | Optical cable |
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Application publication date: 20210518 |