A new energy optical cable and preparation method thereof

Abstract

The present invention relates to a new energy optical cable and a preparation method thereof, and belongs to the technical field of optical cables. A new energy optical cable is composed of an optical fiber, a loose tube, an insulating layer and a sheath layer from the inside to the outside, the loose tube surrounds the periphery of several groups of optical fibers, and a gap is left between the several groups of optical fibers and the loose tube, and the gap is filled with ointment, and the insulating layer is covered on the outside of the loose tube, and the insulating layer is made of aramid material; the loose tube is made of polypropylene material or nylon material; the sheath layer covers the outside of the insulating layer; the sheath layer includes the following components: TPU, HDPE, EVA, organic modified graphene, plasticizer, antioxidant, anti-ultraviolet agent, flame retardant and initiator. The present invention grafts aminothiophenol with vinyl silicone oil, and then forms a chemical bond connection with a benzaldehyde derivative and forms a coating on titanium oxide / graphene oxide. The organically modified graphene can significantly improve the tensile strength and elongation at break and high temperature resistance of the sheath layer.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical cables and relates to a new energy optical cable and a preparation method thereof. Background Art

[0002] Optical cable is a communication cable assembly manufactured according to optical, mechanical or environmental performance standards. Its core is one or more optical fibers, which are placed inside a sheath and can be used alone or in combination. The outside is covered with a protective layer to ensure the effective transmission of optical signals.

[0003] Currently, optical cables are widely used in many fields, such as high-speed communication networks, data center interconnection, radio and television transmission, intelligent transportation systems, industrial automation and control systems, medical health, aerospace and defense, etc. As optical cables are usually directly exposed to the natural environment and are affected by external factors such as high temperature and ultraviolet rays for a long time, the surface of the optical cables is prone to aging and cracking, thus affecting their performance.

[0004] Graphene is a new type of nanomaterial. Due to its unique properties, it has attracted attention in the field of optical cable protection. It has high strength, high toughness, good conductivity and thermal stability. It can enhance the tensile strength, impact resistance, environmental corrosion resistance and electromagnetic interference resistance of optical cables, extend service life, and maintain performance at high temperatures. Therefore, graphene has important application prospects in improving the comprehensive performance of optical cables and ensuring their stable operation. However, due to the lack of active groups and functional groups on the surface of graphene, and the fact that graphene sheets are easy to stack and agglomerate due to the conjugation effect and van der Waals force, its dispersibility in organic matrices such as TPU is extremely poor, which greatly reduces the modification effect and cannot maximize the excellent performance of graphene itself. In order to give full play to the modification effect of graphene on organic matter, it needs to be functionalized. Summary of the invention

[0005] The object of the present invention is to provide a new energy optical cable and a preparation method thereof. The present invention grafts aminothiophenol to vinyl silicone oil through a click reaction, and then forms a chemical bond with 3-methoxy-4-hydroxybenzaldehyde to form a coating on a composite powder composed of titanium oxide / graphene oxide. The organically modified graphene increases its dispersibility and compatibility in an organic system, and can significantly improve the tensile strength, elongation at break and high temperature resistance of the sheath layer.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A new energy optical cable is composed of an optical fiber, a loose tube, an insulating layer and a sheath layer from the inside to the outside, wherein the loose tube surrounds the periphery of a plurality of groups of the optical fibers, a gap is left between the plurality of groups of the optical fibers and the loose tube, the gap is filled with grease, the insulating layer covers the outer side of the loose tube, the insulating layer is made of aramid material; the loose tube is made of polypropylene material or nylon material; the sheath layer covers the outer side of the insulating layer;

[0008] The sheath layer comprises the following components by weight: 80-90 parts of TPU, 10-14 parts of HDPE, 5-8 parts of EVA, 14-20 parts of organic modified graphene, 2-3 parts of plasticizer, 2-4 parts of antioxidant, 2-4 parts of anti-ultraviolet agent, 4-6 parts of flame retardant and 1-2 parts of initiator.

[0009] As a preferred technical solution of the present invention, the plasticizer is one or two of dibutyl phthalate and dioctyl phthalate; the antioxidant is one or more of antioxidant 168, antioxidant 1010, antioxidant 168, antioxidant B215 and antioxidant 264; the anti-ultraviolet agent is one or more of ultraviolet absorber UV234, ultraviolet absorber H61, ultraviolet absorber UV-531 and ultraviolet absorber 1130; the flame retardant is one or more of magnesium hydroxide, aluminum hydroxide, phenyl aluminum hypophosphite and ammonium polyphosphate; the initiator is initiator BPO.

[0010] The present invention discloses a method for preparing the organic modified graphene, comprising the following steps:

[0011] Step 1: Add aminothiophenol and a solvent into a reaction kettle and mix them, add vinyl silicone oil and a photoinitiator and mix them evenly, stir and mix them under UV light, place them in a rotary evaporator to remove the solvent, wash them with water, and perform reduced pressure distillation to obtain an intermediate;

[0012] Step 2: adding graphene oxide and isopropanol into a reaction kettle and mixing them, adding a titanate coupling agent, heating and stirring, filtering, washing the filter residue, drying, and calcining to obtain a composite powder;

[0013] Step 3: The composite powder, isopropanol and small molecule monomer are mixed and then mechanically ground, placed in a reaction kettle, the intermediate is added, heated and stirred, and then filtered, the filter residue is washed, and placed in an oven for drying to obtain organic modified graphene.

[0014] As a preferred technical solution of the present invention, in step one, the mixing time is 30-40 minutes; the uniform mixing is mixing at a speed of 400-600 r / min for 30-40 minutes; the stirring mixing is stirring at a speed of 500-700 r / min for 2-3 hours; the wavelength of the UV light irradiation is 365 nm; the solvent is n-hexane; the mass ratio of the aminothiophenol, the solvent, the vinyl silicone oil and the photoinitiator is 10-16:30-40:30-40:0.9-1.2; the molecular weight of the vinyl silicone oil is 1000-2000, and the double bond content is 10-12%; the photoinitiator is photoinitiator 651, benzoin dimethyl ether; and the aminothiophenol is 4-aminothiophenol.

[0015] As a preferred technical solution of the present invention, in step 2, the mixing time is 30-40min; the heating and stirring is stirring at a temperature of 50-60°C for 4-5h; the washing is washing 3 times with isopropanol; the drying is drying to constant weight at a temperature of 110°C; the calcination is calcining at a temperature of 700-720°C for 1.5-2.0h; the mass ratio of the graphene oxide, isopropanol and titanate coupling agent is 6-8:20-30:2.4-3.0; the titanate coupling agent is titanate coupling agent TC-131; the particle size distribution of the graphene oxide powder treated with the titanate coupling agent is significantly narrowed, the agglomeration is reduced, which is beneficial to its calcination uniformity, and titanium dioxide is in situ generated on the graphene oxide, which reduces the self-agglomeration phenomenon of the graphene oxide, increases its dispersion stability, and can improve its dispersibility in the organic modification system of step 3, thereby improving the organic modification effect.

[0016] As a preferred technical solution of the present invention, in step three, the mechanical grinding is grinding at a speed of 300-400r / rotation for 40-60min; the heating stirring is stirring at a temperature of 50-70°C for 5-8h; the washing is washing with ethanol for 3 times; the oven drying is drying at a temperature of 80°C to constant weight; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 16-20:40-50:4.2-5.0:3.4-4.0; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde, and the present invention utilizes the methoxy and hydroxyl groups of 3-methoxy-4-hydroxybenzaldehyde to form hydrogen bonds with the hydroxyl groups on the composite powder to promote its entry and loading in the structure of the composite powder, increase the interface force between it and the organic coating layer, and increase the coating effect.

[0017] The present invention discloses a method for preparing a new energy optical cable, comprising the following steps:

[0018] Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer, mixing them, heating them, adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator, and mixing them evenly to obtain a premix;

[0019] Step S2: placing the premix in a twin-screw extruder to melt and extrude it outside the insulation layer, and after cooling and forming, obtaining a sheath layer to produce a new energy optical cable.

[0020] As a preferred technical solution of the present invention, the heating is to heat to a temperature of 70-80°C; the temperature of the melt extrusion is 190-210°C.

[0021] Beneficial effects of the present invention:

[0022] The present invention grafts aminothiophenol onto vinyl silicone oil through a click reaction, and then forms a chemical bond with 3-methoxy-4-hydroxybenzaldehyde to coat a composite powder composed of titanium oxide / graphene oxide. The organically modified graphene increases its dispersibility and compatibility in an organic system, and can significantly improve the tensile strength, elongation at break and high temperature resistance of the sheath layer. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0024] A new energy optical cable, which is composed of an optical fiber, a loose tube, an insulating layer and a sheath layer from the inside to the outside, wherein the loose tube surrounds the periphery of a plurality of groups of optical fibers, a gap is left between the plurality of groups of optical fibers and the loose tube, the gap is filled with grease, the insulating layer covers the outer side of the loose tube, the insulating layer is made of aramid material; the loose tube is made of polypropylene material or nylon material; the sheath layer covers the outer side of the insulating layer;

[0025] The preparation method of the new energy optical cable comprises the following steps:

[0026] Step S1: placing TPU, HDPE, organic modified graphene and EVA in an internal mixer and mixing them, heating them to 70-80° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0027] Step S2: placing the premix in a twin-screw extruder and melt-extrude it at 190-210° C. outside the insulation layer, cooling and forming it to obtain a sheath layer, thereby producing a new energy optical cable.

[0028] Example 1

[0029] The sheath layer comprises the following components by weight: 80 parts of TPU, 10 parts of HDPE, 5 parts of EVA, 14 parts of organic modified graphene, 2 parts of plasticizer, 2 parts of antioxidant, 2 parts of anti-ultraviolet agent, 4 parts of flame retardant and 1 part of initiator;

[0030] The plasticizer is dibutyl phthalate; the antioxidant is a mixture of antioxidant 168 and antioxidant 1010 in a mass ratio of 1:2; the anti-ultraviolet agent is ultraviolet absorber UV234; the flame retardant is a mixture of aluminum hydroxide and phenyl aluminum hypophosphite in a mass ratio of 3:1; the initiator is initiator BPO;

[0031] The preparation method of the organic modified graphene comprises the following steps:

[0032] Step 1: adding 4-aminothiophenol and n-hexane into a reaction kettle and mixing for 30 minutes, adding vinyl silicone oil and photoinitiator 651 and mixing at a speed of 400 r / min for 30 minutes, stirring at a speed of 500 r / min for 2 hours under UV light of a wavelength of 365 nm, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of the 4-aminothiophenol, n-hexane, vinyl silicone oil and photoinitiator 651 is 10:30:30:0.9; the molecular weight of the vinyl silicone oil is 1000, and the double bond content is 10%;

[0033] Step 2: adding graphene oxide and isopropanol to a reactor and mixing for 30 minutes, adding titanate coupling agent TC-131, stirring at 50°C for 4 hours, filtering, washing the filter residue with isopropanol for 3 times, drying at 110°C to constant weight, and calcining at 700°C for 1.5 hours to obtain a composite powder; the mass ratio of graphene oxide, isopropanol and titanate coupling agent TC-131 is 6:20:2.4;

[0034] Step 3: After mixing the composite powder, isopropanol and small molecule monomer, grind at 300r / speed for 40min, place in a reactor, add the intermediate, stir at 50°C for 5h, filter, wash the filter residue with ethanol 3 times, place in an oven at 80°C and dry to constant weight to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 16:40:4.2:3.4; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde;

[0035] The preparation method of the sheath layer comprises the following steps:

[0036] Step S1: placing TPU, HDPE, organic modified graphene and EVA in an internal mixer and mixing them, heating them to 70° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0037] Step S2: placing the premix in a twin-screw extruder and melt-extruded at 190° C. outside the insulating layer, and cooling and molding to obtain a sheath layer.

[0038] Example 2

[0039] The sheath layer comprises the following components by weight: 82 parts of TPU, 11 parts of HDPE, 5.8 parts of EVA, 16 parts of organic modified graphene, 2.2 parts of plasticizer, 2.5 parts of antioxidant, 2.5 parts of anti-ultraviolet agent, 4.5 parts of flame retardant and 1.2 parts of initiator;

[0040] The plasticizer is dibutyl phthalate; the antioxidant is a mixture of antioxidant 168 and antioxidant 1010 in a mass ratio of 1:2; the anti-ultraviolet agent is ultraviolet absorber UV234; the flame retardant is a mixture of aluminum hydroxide and phenyl aluminum hypophosphite in a mass ratio of 3:1; the initiator is initiator BPO;

[0041] The preparation method of the organic modified graphene comprises the following steps:

[0042] Step 1: adding 4-aminothiophenol and n-hexane into a reaction kettle and mixing for 32 minutes, adding vinyl silicone oil and photoinitiator 651 and mixing at a speed of 450 r / min for 32 minutes, stirring at a speed of 550 r / min for 2.2 hours under UV light of 365 nm wavelength, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of 4-aminothiophenol, n-hexane, vinyl silicone oil and photoinitiator 651 is 12:32:32:0.98; the molecular weight of the vinyl silicone oil is 1250, and the double bond content is 10.5%;

[0043] Step 2: adding graphene oxide and isopropanol to a reactor and mixing for 32 minutes, adding titanate coupling agent TC-131, stirring at 52°C for 4.2 hours, filtering, washing the filter residue with isopropanol for 3 times, drying at 110°C to constant weight, and calcining at 705°C for 1.6 hours to obtain a composite powder; the mass ratio of graphene oxide, isopropanol and titanate coupling agent TC-131 is 6.5:22:2.6;

[0044] Step 3: After mixing the composite powder, isopropanol and small molecule monomer, grind at 325r / speed for 45min, place in a reactor, add the intermediate, stir at 55°C for 5.8h, filter, wash the filter residue with ethanol 3 times, place in an oven at 80°C and dry to constant weight to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 17:42:4.4:3.6; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde;

[0045] The preparation method of the sheath layer comprises the following steps:

[0046] Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer and mixing them, heating them to 72° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0047] Step S2: placing the premix in a twin-screw extruder and melt-extruded at 195° C. outside the insulating layer, and cooling and molding to obtain a sheath layer.

[0048] Example 3

[0049] The sheath layer comprises the following components by weight: 85 parts of TPU, 12 parts of HDPE, 6.5 parts of EVA, 17 parts of organic modified graphene, 2.5 parts of plasticizer, 3 parts of antioxidant, 3 parts of anti-ultraviolet agent, 5 parts of flame retardant and 1.5 parts of initiator;

[0050] The plasticizer is dibutyl phthalate; the antioxidant is a mixture of antioxidant 168 and antioxidant 1010 in a mass ratio of 1:2; the anti-ultraviolet agent is ultraviolet absorber UV234; the flame retardant is a mixture of aluminum hydroxide and phenyl aluminum hypophosphite in a mass ratio of 3:1; the initiator is initiator BPO;

[0051] The preparation method of the organic modified graphene comprises the following steps:

[0052] Step 1: adding 4-aminothiophenol and n-hexane into a reaction kettle and mixing for 35 minutes, adding vinyl silicone oil and photoinitiator 651 and mixing at a speed of 500 r / min for 35 minutes, stirring at a speed of 600 r / min for 2.5 hours under UV light of 365 nm wavelength, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of the 4-aminothiophenol, n-hexane, vinyl silicone oil and photoinitiator 651 is 13:35:35:1.05; the molecular weight of the vinyl silicone oil is 1500, and the double bond content is 11%;

[0053] Step 2: adding graphene oxide and isopropanol to a reactor and mixing for 35 minutes, adding titanate coupling agent TC-131, stirring at 55°C for 4.5 hours, filtering, washing the filter residue with isopropanol for 3 times, drying at 110°C to constant weight, and calcining at 710°C for 1.8 hours to obtain a composite powder; the mass ratio of graphene oxide, isopropanol and titanate coupling agent TC-131 is 7:25:2.7;

[0054] Step 3: After mixing the composite powder, isopropanol and small molecule monomer, grind at 350r / speed for 50min, place in a reactor, add the intermediate, stir at 60°C for 6.5h, filter, wash the filter residue with ethanol 3 times, place in an oven at 80°C and dry to constant weight to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 18:45:4.6:3.7; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde;

[0055] The preparation method of the sheath layer comprises the following steps:

[0056] Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer and mixing them, heating them to 75° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0057] Step S2: placing the premix in a twin-screw extruder and melt-extruded at 200° C. outside the insulating layer, and cooling and molding to obtain a sheath layer.

[0058] Example 4

[0059] The sheath layer comprises the following components by weight: 88 parts of TPU, 13 parts of HDPE, 7 parts of EVA, 18 parts of organic modified graphene, 2.8 parts of plasticizer, 3.5 parts of antioxidant, 3.5 parts of anti-ultraviolet agent, 5.5 parts of flame retardant and 1.8 parts of initiator;

[0060] The plasticizer is dibutyl phthalate; the antioxidant is a mixture of antioxidant 168 and antioxidant 1010 in a mass ratio of 1:2; the anti-ultraviolet agent is ultraviolet absorber UV234; the flame retardant is a mixture of aluminum hydroxide and phenyl aluminum hypophosphite in a mass ratio of 3:1; the initiator is initiator BPO;

[0061] The preparation method of the organic modified graphene comprises the following steps:

[0062] Step 1: adding 4-aminothiophenol and n-hexane into a reaction kettle and mixing for 38 minutes, adding vinyl silicone oil and photoinitiator 651 and mixing at a speed of 550 r / min for 38 minutes, stirring at a speed of 650 r / min for 2.8 hours under UV light of 365 nm wavelength, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of 4-aminothiophenol, n-hexane, vinyl silicone oil and photoinitiator 651 is 14:38:38:1.1; the molecular weight of the vinyl silicone oil is 1750, and the double bond content is 11.5%;

[0063] Step 2: adding graphene oxide and isopropanol to a reactor and mixing for 38 minutes, adding titanate coupling agent TC-131, stirring at 58°C for 4.8 hours, filtering, washing the filter residue with isopropanol for 3 times, drying at 110°C to constant weight, and calcining at 715°C for 2 hours to obtain a composite powder; the mass ratio of graphene oxide, isopropanol and titanate coupling agent TC-131 is 7.5:28:2.8;

[0064] Step 3: After mixing the composite powder, isopropanol and small molecule monomer, grind at 375r / speed for 55min, place in a reactor, add the intermediate, stir at 65°C for 7h and filter, wash the filter residue with ethanol 3 times, place in an oven at 80°C and dry to constant weight to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 19:48:4.8:3.8; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde;

[0065] The preparation method of the sheath layer comprises the following steps:

[0066] Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer and mixing them, heating them to 78° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0067] Step S2: placing the premix in a twin-screw extruder and melt-extruded at 205° C. outside the insulating layer, and cooling and molding to obtain a sheath layer.

[0068] Example 5

[0069] The sheath layer comprises the following components by weight: 90 parts of TPU, 14 parts of HDPE, 8 parts of EVA, 20 parts of organic modified graphene, 3 parts of plasticizer, 4 parts of antioxidant, 4 parts of anti-ultraviolet agent, 6 parts of flame retardant and 2 parts of initiator;

[0070] The plasticizer is dibutyl phthalate; the antioxidant is a mixture of antioxidant 168 and antioxidant 1010 in a mass ratio of 1:2; the anti-ultraviolet agent is ultraviolet absorber UV234; the flame retardant is a mixture of aluminum hydroxide and phenyl aluminum hypophosphite in a mass ratio of 3:1; the initiator is initiator BPO;

[0071] The preparation method of the organic modified graphene comprises the following steps:

[0072] Step 1: adding 4-aminothiophenol and n-hexane into a reaction kettle and mixing for 40 minutes, adding vinyl silicone oil and photoinitiator 651 and mixing at a speed of 600 r / min for 40 minutes, stirring at a speed of 700 r / min for 3 hours under UV light of 365 nm wavelength, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of the 4-aminothiophenol, n-hexane, vinyl silicone oil and photoinitiator 651 is 16:40:40:1.2; the molecular weight of the vinyl silicone oil is 2000, and the double bond content is 12%;

[0073] Step 2: adding graphene oxide and isopropanol to a reactor and mixing for 40 minutes, adding titanate coupling agent TC-131 and stirring at 60°C for 5 hours, filtering, washing the filter residue with isopropanol for 3 times, drying at 110°C to constant weight, and calcining at 720°C for 2.0 hours to obtain a composite powder; the mass ratio of graphene oxide, isopropanol and titanate coupling agent TC-131 is 8:30:3.0;

[0074] Step 3: After mixing the composite powder, isopropanol and the small molecule monomer, grind at a speed of 400r / for 60min, place in a reactor, add the intermediate, stir at 70°C for 8h, filter, wash the filter residue with ethanol 3 times, place in an oven at 80°C and dry to constant weight to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 20:50:5.0:4.0; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde;

[0075] The preparation method of the sheath layer comprises the following steps:

[0076] Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer and mixing them, heating them to 80° C., adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator and mixing them evenly to obtain a premix;

[0077] Step S2: placing the premix in a twin-screw extruder and melt-extruded at 210° C. outside the insulating layer, cooling and molding to obtain a sheath layer.

[0078] Comparative Example 1

[0079] Compared with Example 4, the difference in Comparative Example 1 is that 4-aminobenzenethiol is used instead of the intermediate in Step 1, and the other components, preparation steps and parameters are the same.

[0080] Comparative Example 2

[0081] Compared with Example 4, the difference in Comparative Example 2 is that vinyl silicone oil is used instead of the intermediate in Step 1, and the other components, preparation steps and parameters are the same.

[0082] Comparative Example 3

[0083] Compared with Example 4, the difference in Comparative Example 3 is that no titanate coupling agent is used in step 2, and the other components, preparation steps and parameters are the same.

[0084] Comparative Example 4

[0085] Compared with Example 4, the difference of Comparative Example 4 is that titanium dioxide is used in step 2 instead of titanate coupling agent, and the other components, preparation steps and parameters are the same.

[0086] Comparative Example 5

[0087] Compared with Example 4, Comparative Example 5 is different in that no small molecule monomer is used in step 3, and the other components, preparation steps and parameters are the same.

[0088] The sheath layers prepared in Examples 1-5 and Comparative Examples 1-5 were subjected to the following performance tests, respectively. The test results are shown in Table 1.

[0089] Mechanical properties: According to GB / T1040-1992, test tensile strength and elongation at break;

[0090] High temperature resistance test: After being heated in an oven at 180°C for 24 hours, its mechanical properties are tested;

[0091] Table 1

[0092]

[0093] From the test results in Table 1, it can be seen that compared with comparative examples 1-5, the mechanical properties and high temperature resistance of the sheath layer prepared in embodiments 1-5 are significantly better than those of the sheath layer prepared in comparative examples 1-5.

[0094] Compared with Example 1-5 and Comparative Example 1-5, combined with the analysis of Table 1, it can be seen that the present invention uses a click reaction between a thiol group and a carbon-carbon double bond to graft aminothiophenol onto vinyl silicone oil, introduce active amino groups and rigid benzene ring structures, and then use the amino group to form a chemical bond with 3-methoxy-4-hydroxybenzaldehyde to form a coating on the composite powder composed of titanium oxide / graphene oxide. The oxygen-containing groups of 3-methoxy-4-hydroxybenzaldehyde increase the adsorption of the intermediate through hydrogen bonding forces, and combine the coordination bond between sulfur element and titanium ion to form mutual adsorption, which significantly improves the coating effect of the composite powder. In addition, the graphene oxide modified by the titanate coupling agent is calcined, and the generated titanium dioxide can reduce the collapse of graphene oxide due to excessive high temperature calcination, significantly increase the specific surface area of ​​the composite powder and introduce more active oxygen-containing groups, which is beneficial to the later organic coating modification; and the organically modified graphene increases the graphene and titanium oxide in TPU and HDPE. The dispersion compatibility with EVA and other organic systems can significantly improve the tensile strength and elongation at break of the sheath layer. The system introduces a variety of mechanisms such as silicone network structure, benzene ring structure with good thermal stability, Schiff base structure and heat-resistant inorganic filler to significantly improve the high temperature resistance of the sheath layer material.

[0095] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new energy optical cable, characterized in that: The new energy optical cable is composed of an optical fiber, a loose tube, an insulating layer and a sheath layer from the inside to the outside, the loose tube surrounds the periphery of several groups of the optical fibers, a gap is left between the several groups of the optical fibers and the loose tube, the gap is filled with grease, the insulating layer covers the outside of the loose tube, and the insulating layer is made of aramid material; the loose tube is made of polypropylene material or nylon material; the sheath layer covers the outside of the insulating layer; the sheath layer includes the following components by weight: 80-90 parts of TPU, 10-14 parts of HDPE, 5-8 parts of EVA, 14-20 parts of organic modified graphene, 2-3 parts of plasticizer, 2-4 parts of antioxidant, 2-4 parts of anti-ultraviolet agent, 4-6 parts of flame retardant and 1-2 parts of initiator; Wherein, the preparation method of the organic modified graphene comprises the following steps: Step 1: adding aminothiophenol and solvent into a reaction kettle for mixing, adding vinyl silicone oil and photoinitiator for uniform mixing, stirring and mixing under UV light irradiation, placing in a rotary evaporator to remove the solvent, washing with water, and distilling under reduced pressure to obtain an intermediate; the mass ratio of aminothiophenol, solvent, vinyl silicone oil and photoinitiator is 10-16:30-40:30-40:0.9-1.2; the molecular weight of the vinyl silicone oil is 1000-2000, and the double bond content is 10-12%; the mixing time is 30-40min; the uniform mixing is mixing at a speed of 400-600r / min for 30-40min; the stirring and mixing is stirring at a speed of 500-700r / min for 2-3h; the wavelength of the UV light irradiation is 365nm; the solvent is n-hexane; the photoinitiator is photoinitiator 651; the aminothiophenol is 4-aminothiophenol; Step 2: adding graphene oxide and isopropanol into a reaction kettle and mixing them, adding a titanate coupling agent, heating and stirring, filtering, washing the filter residue, drying, and calcining to obtain a composite powder; the mass ratio of the graphene oxide, isopropanol and titanate coupling agent is 6-8:20-30:2.4-3.0; Step 3: The composite powder, isopropanol and small molecule monomer are mixed and then mechanically ground, placed in a reaction kettle, the intermediate is added, the temperature is increased and stirred, and then filtered, the filter residue is washed, and then placed in an oven for drying to obtain organic modified graphene; the mass ratio of the composite powder, isopropanol, small molecule monomer and intermediate is 16-20:40-50:4.2-5.0:3.4-4.0; the small molecule monomer is 3-methoxy-4-hydroxybenzaldehyde.

2. A new energy optical cable according to claim 1, characterized in that: The plasticizer is one or two of dibutyl phthalate and dioctyl phthalate.

3. A new energy optical cable according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 168, antioxidant 1010, antioxidant 168, antioxidant B215 and antioxidant 264.

4. The new energy optical cable according to claim 1, characterized in that: The anti-ultraviolet agent is one or more of ultraviolet absorber UV234, ultraviolet absorber H61, ultraviolet absorber UV-531 and ultraviolet absorber 1130.

5. The new energy optical cable according to claim 1, characterized in that: The flame retardant is one or more of magnesium hydroxide, aluminum hydroxide, phenyl aluminum phosphite and ammonium polyphosphate; and the initiator is initiator BPO.

6. The new energy optical cable according to claim 1, characterized in that: In step 2, the mixing time is 30-40 minutes; the heating and stirring is stirring at a temperature of 50-60°C for 4-5 hours; the washing is washing 3 times with isopropanol; the drying is drying at a temperature of 110°C to constant weight; the calcination is calcining at a temperature of 700-720°C for 1.5-2.0 hours; and the titanate coupling agent is titanate coupling agent TC-131.

7. The new energy optical cable according to claim 1, characterized in that: In step three, the mechanical grinding is grinding at a speed of 300-400r / rotation for 40-60min; the heating stirring is stirring at a temperature of 50-70°C for 5-8h; the washing is washing with ethanol for 3 times; and the oven drying is drying at a temperature of 80°C to constant weight.

8. A method for preparing a new energy optical cable according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: Step S1: placing TPU, HDPE, organically modified graphene and EVA in an internal mixer, mixing them, heating them, adding a plasticizer, an antioxidant, an anti-ultraviolet agent, a flame retardant and an initiator, and mixing them evenly to obtain a premix; Step S2: placing the premix in a twin-screw extruder to melt and extrude it outside the insulation layer, and after cooling and forming, obtaining a sheath layer to produce a new energy optical cable.

9. The method for preparing a new energy optical cable according to claim 8, characterized in that: The heating is performed to a temperature of 70-80°C; the temperature of the melt extrusion is 190-210°C.

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