A self-supporting optical cable with strong abrasion resistance and its preparation method

Abstract

The present invention discloses a self-supporting optical cable with strong abrasion resistance and a preparation method thereof, relating to the technical field of optical elements. In the present invention, glucose is used to mechanically activate and modify starch to improve the dispersibility of the starch, thereby avoiding aggregation on the surface of the optical cable core and thus affecting subsequent effects. After activation, the starch is uniformly deposited on the surface of the core to form a starch layer. Through carbonization and graphitization, the surface starch layer effectively transforms from a carbon layer to graphite, enabling the graphene to closely adhere to the core, with good composite stability, which can be used as a non-metallic strengthening layer of the optical cable to achieve a self-supporting effect; the sheath layer used in the present invention is a protective layer prepared mainly from silicone resin. The interaction between glass flake powder and mica powder in a specific proportion effectively improves the abrasion resistance of the coating, and the silicone resin is ground with the glass flake powder and mica powder in batches to improve the dispersibility of the powder in the silicone resin, thereby improving the abrasion resistance of the protective layer.

Description

Technical Field

[0001] The present invention relates to the technical field of optical components, and particularly to a self-supporting optical cable with strong wear resistance and a preparation method thereof. Background Art

[0002] An optical cable is manufactured to meet optical, mechanical or environmental performance specifications. It is a communication cable assembly that uses one or more optical fibers placed in a coated sheath as a transmission medium and can be used alone or in groups. The all-dielectric self-supporting optical cable is used in an environment where it is laid on the same tower as a high-voltage transmission line. Due to the many advantages of this optical cable, such as a small outer diameter, light weight, large installation span, lightning protection, immunity to electromagnetic interference, and easy laying, and it can follow the existing power lines, making full use of its tower resources and saving a large amount of engineering construction costs, it has been favored by the power department in recent years and has been widely used in the power grid renovation. In actual applications, the optical cable is prone to wear during installation, pulling, and erection. Therefore, the present invention proposes a self-supporting optical cable with strong wear resistance. Summary of the Invention

[0003] The purpose of the present invention is to provide a self-supporting optical cable with strong wear resistance and a preparation method thereof to solve the problems existing in the prior art.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A preparation method of a self-supporting optical cable with strong wear resistance, comprising the following preparation steps:

[0005] (1) Put cassava starch into an oven for drying, then mix the dried cassava starch with glucose and place them in a ball mill. After grinding for 2 - 5 h, add 70% ethanol aqueous solution until the concentration of cassava starch is 0.5 - 1.1 g / 100 mL, and continue to grind for 4 - 6 h to obtain an activated starch solution;

[0006] (2) Immerse the cable core completely in the activated starch solution, apply ultrasonic waves at 20 kHz for 20 min, then let it stand for 40 min, repeat the above process 3 - 5 times, take it out, and dry it at room temperature for 4 - 6 h to obtain a cable core loaded with starch;

[0007] (3) Place the cable core loaded with starch in a reaction chamber and perform carbonization and graphitization for 4 - 6 h to obtain a graphene layer cable core;

[0008] (4) Put silicone resin, ethyl acetate, glass flake powder, and bis(aminotrimethoxysilane) into a three-roll mill for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 50 μm to obtain Material A; put silicone resin, n-butyl acetate, mica powder, and bis(aminotrimethoxysilane) into a three-roll mill for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 25 μm to obtain Material B; mix Material A and Material B in a mass ratio of 1:1 to 2, stir evenly, and then add 0.5 to 1.5% of dibutyltin dilaurate based on the total mass of the materials to obtain the protective layer coating;

[0009] (5) Uniformly apply the protective layer coating on the graphene layer cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong wear resistance.

[0010] Further, in step (1), the drying is carried out until the moisture content is 6%.

[0011] Further, in step (1), the oven temperature is 45 °C.

[0012] Further, in step (1), the mass ratio of the dried cassava starch to glucose is 100:2.5 to 10.

[0013] Further, in step (1), the grinding conditions are: rotation speed 40 r / min and ball-to-material mass ratio 3:1.

[0014] Further, in step (3), the conditions for carbonization and grapheneization are: reaction chamber pressure 5 to 10 kPa, at 550 to 650 °C, under an argon atmosphere.

[0015] Further, in step (4), in terms of the mass fraction of each raw material component in Material A, silicone resin is 20 to 30 parts, ethyl acetate is 22 to 34 parts, glass flake powder is 5 to 10 parts, and bis(aminotrimethoxysilane) is 1 to 3 parts.

[0016] Further, in step (4), the silicone resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 0.5 to 1%.

[0017] Further, in step (4), in terms of the mass fraction of each raw material component in Material B, silicone resin is 20 to 30 parts, n-butyl acetate is 22 to 34 parts, mica powder is 5 to 10 parts, and bis(aminotrimethoxysilane) is 1 to 3 parts.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] The optical cable prepared by the present invention is a self-supporting optical cable, which from the inside to the outside is successively a cable core, a non-metallic strengthening layer, and a protective layer, effectively achieving the effects of wear resistance and high strength.

[0020] The present invention uses glucose to mechanically activate and modify starch. Glucose forms a connecting bridge with a fixing effect between starch granules, improving the dispersibility of starch, thus avoiding aggregation on the surface of the cable core and affecting subsequent effects. The activated starch is evenly deposited on the surface of the cable core to form a starch layer. After carbonization and grapheneization, the surface starch layer effectively transforms from a carbon layer to graphite, and the graphene is closely attached to the cable core with good composite stability. At the same time, the graphene layer can play a mechanical support role and can be used as a non-metallic strengthening layer of the optical cable to achieve a self-supporting effect.

[0021] The sheath layer used in the present invention is a protective layer prepared from silicone resin as the main raw material. The interaction of specific proportions of glass flake powder and mica powder effectively improves the wear resistance of the coating. And the silicone resin is ground with the glass flake powder and mica powder in batches to improve the dispersibility of the powder in the silicone resin, thereby improving the wear resistance of the protective layer. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Example 1

[0024] (1) Put cassava starch into an oven at 45 °C and dry it until the moisture content is 6%. Then mix the dried cassava starch and glucose at a mass ratio of 100:2.5 and place them in a ball mill. Grind for 2 h at a rotation speed of 40 r / min and a ball-to-material mass ratio of 3:1. Then add a 70% ethanol aqueous solution until the concentration of cassava starch is 0.5 g / 100 mL, and continue to grind for 4 h to obtain an activated starch solution;

[0025] (2) Immerse the cable core completely in the activated starch solution, perform ultrasonic treatment at 20 kHz for 20 min, then let it stand for 40 min, repeat the above process 3 times, take it out, and dry it at room temperature for 4 - 6 h to obtain a cable core loaded with starch;

[0026] (3) Place the cable core loaded with starch in the reaction chamber. The pressure in the reaction chamber is 5 kPa, at 550 °C, under an argon atmosphere, perform carbonization and grapheneization for 4 h to obtain a cable core with a graphene layer;

[0027] (4) Put 20 parts by mass of silicone resin, 22 parts by mass of ethyl acetate, 5 parts by mass of glass flake powder, and 1 part by mass of bisaminotrimethoxysilane into a three-roll mill and grind and disperse them 2 times. The grinding time for each time is 60 min, and the distance between adjacent rolls is 50 μm to obtain material A; put 20 parts by mass of silicone resin, 22 parts by mass of n-butyl acetate, 5 parts by mass of mica powder, and 1 part by mass of bisaminotrimethoxysilane into a three-roll mill and grind and disperse them 2 times. The grinding time for each time is 60 min, and the distance between adjacent rolls is 25 μm to obtain material B; mix material A and material B according to a mass ratio of 1:1, stir evenly, and add 0.5% of dibutyltin dilaurate based on the total mass of the material to obtain a protective layer coating; the silicone resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 0.5%;

[0028] (5) Uniformly apply the protective layer coating on the graphene layer cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong wear resistance.

[0029] Example 2

[0030] (1) Put the cassava starch into an oven at 45 °C and dry it until the moisture content is 6%. Then mix the dried cassava starch and glucose according to a mass ratio of 100:6 and place them in a ball mill. Grind for 3.5 h at a rotation speed of 40 r / min and a ball-to-material mass ratio of 3:1, then add 70% ethanol aqueous solution until the concentration of cassava starch is 0.8 g / 100 mL, and continue to grind for 5 h to obtain an activated starch solution;

[0031] (2) Completely immerse the cable core in the activated starch solution, carry out ultrasonic treatment at 20 kHz for 20 min, and then let it stand for 40 min. Repeat the above process 4 times, take it out, and dry it at room temperature for 5 h to obtain a cable core loaded with starch;

[0032] (3) Place the cable core loaded with starch in a reaction chamber. The pressure in the reaction chamber is 7.5 kPa, at 600 °C, under an argon atmosphere, carry out carbonization and grapheneization for 5 h to obtain a graphene layer cable core;

[0033] (4) Put 25 parts by mass of silicone resin, 28 parts by mass of ethyl acetate, 7 parts by mass of glass flake powder, and 2 parts by mass of bis(amino)trimethoxysilane into a three-roll mill for grinding and dispersion twice. The grinding time for each time is 60 min, and the distance between adjacent rolls is 50 μm to obtain material A; put 25 parts by mass of silicone resin, 27 parts by mass of n-butyl acetate, 7 parts by mass of mica powder, and 2 parts by mass of bis(amino)trimethoxysilane into a three-roll mill for grinding and dispersion twice. The grinding time for each time is 60 min, and the distance between adjacent rolls is 25 μm to obtain material B; mix material A and material B according to a mass ratio of 1:1.5, stir evenly, and then add 1% of dibutyltin dilaurate based on the total mass of the materials to obtain a protective layer coating; the silicone resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 0.8%;

[0034] (5) Uniformly apply the protective layer coating on the graphene layer cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong wear resistance.

[0035] Example 3

[0036] (1) Put the cassava starch into an oven at 45 °C and dry it until the moisture content is 6%. Then, place the dried cassava starch and glucose in a ball mill according to a mass ratio of 100:10. Grind for 5 h at a rotation speed of 40 r / min and a ball-to-material mass ratio of 3:1. Then, add a 70% ethanol aqueous solution until the concentration of cassava starch is 1.1 g / 100 mL, and continue grinding for 6 h to obtain an activated starch solution;

[0037] (2) Immerse the cable core completely in the activated starch solution, carry out ultrasonic treatment at 20 kHz for 20 min, and then let it stand for 40 min. Repeat the above process 5 times, take it out, and dry it at room temperature for 6 h to obtain a cable core loaded with starch;

[0038] (3) Place the cable core loaded with starch in a reaction chamber. The pressure in the reaction chamber is 10 kPa, at 650 °C, and under an argon atmosphere, carry out carbonization and grapheneization for 6 h to obtain a graphene layer cable core;

[0039] (4) Put 30 parts by mass of silicone resin, 34 parts by mass of ethyl acetate, 10 parts by mass of glass flake powder, and 3 parts by mass of bis(aminotrimethoxysilane) into a three-roll grinder for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 50 μm to obtain Material A; put 30 parts by mass of silicone resin, 34 parts by mass of n-butyl acetate, 10 parts by mass of mica powder, and 3 parts by mass of bis(aminotrimethoxysilane) into a three-roll grinder for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 25 μm to obtain Material B; mix Material A and Material B in a mass ratio of 1:2, stir evenly, and then add 1.5% of dibutyltin dilaurate based on the total mass of the materials to obtain the protective layer coating; the silicone resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 1%;

[0040] (5) Uniformly apply the protective layer coating on the graphene layer cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong abrasion resistance.

[0041] Comparative Example 1

[0042] The difference between Comparative Example 1 and Example 2 is only that glucose is not added, and the remaining steps are the same as those in Example 2.

[0043] Comparative Example 2

[0044] (1) Put 25 parts by mass of silicone resin, 28 parts by mass of ethyl acetate, 7 parts by mass of glass flake powder, and 2 parts by mass of bis(aminotrimethoxysilane) into a three-roll grinder for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 50 μm to obtain Material A; put 25 parts by mass of silicone resin, 27 parts by mass of n-butyl acetate, 7 parts by mass of mica powder, and 2 parts by mass of bis(aminotrimethoxysilane) into a three-roll grinder for grinding and dispersing twice, with each grinding time being 60 min and the distance between adjacent rolls being 25 μm to obtain Material B; mix Material A and Material B in a mass ratio of 1:1.5, stir evenly, and then add 1% of dibutyltin dilaurate based on the total mass of the materials to obtain the protective layer coating; the silicone resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 0.8%;

[0045] (2) Uniformly apply the protective layer coating on the cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong abrasion resistance.

[0046] Comparative Example 3

[0047] (1) Put the cassava starch into an oven at 45 °C and dry it until the moisture content is 6%. Then, mix the dried cassava starch with glucose at a mass ratio of 100:6, place it in a ball mill, grind it for 3.5 h at a rotation speed of 40 r / min and a ball-to-material mass ratio of 3:1, add 70% ethanol aqueous solution until the concentration of cassava starch is 0.8 g / 100 mL, and continue to grind for 5 h to obtain an activated starch solution;

[0048] (2) Immerse the cable core completely in the activated starch solution, sonicate it at 20 kHz for 20 min, then let it stand for 40 min, repeat the above process 4 times, take it out, and dry it at room temperature for 5 h to obtain a cable core loaded with starch;

[0049] (3) Place the cable core loaded with starch in the reaction chamber, the pressure of the reaction chamber is 7.5 kPa, at 600 °C, under an argon atmosphere, carry out carbonization and graphitization for 5 h to obtain a graphene-layered cable core;

[0050] (4) Mix 62.5 parts by mass of organosilicon resin, 28 parts by mass of ethyl acetate, 7 parts by mass of glass flake powder, 5 parts by mass of bisaminotrimethoxysilane, 40.5 parts by mass of n-butyl acetate, and 10.5 parts by mass of mica powder evenly, and then add 1% of dibutyltin dilaurate based on the total mass of the materials to obtain a protective layer coating; the organosilicon resin is a hydroxyl-containing polydimethylsiloxane resin with a hydroxyl content of 0.8%;

[0051] (5) Uniformly apply the protective layer coating on the graphene-layered cable core and cure it at room temperature for 24 h to obtain a self-supporting optical cable with strong wear resistance.

[0052] Effect Example

[0053] The following Table 1 gives the performance analysis results of the self-supporting optical cables using Examples 1 to 3 and Comparative Examples 1 to 3 of the present invention.

[0054] Table 1

[0055] Tensile strength (MPa) Wear rate (%) Example 1 88 4.5 Example 2 101 4.4 Example 3 95 4.4 Comparative Example 1 28 4.6 Comparative Example 2 29 5.1 Comparative Example 3 86 7.2

[0056] The present invention utilizes glucose to mechanically activate and modify starch. Glucose forms a connecting bridge with a fixing effect between starch granules, improving the dispersibility of starch, thereby avoiding aggregation on the surface of the cable core of the optical cable and further affecting subsequent effects. The activated starch is uniformly deposited on the surface of the cable core to form a starch layer. After carbonization and graphitization, the surface starch layer effectively transforms from a carbon layer to graphite, and the graphene is closely attached to the cable core, with good composite stability. At the same time, the graphene layer can play a mechanical support role and can be used as a non-metallic strengthening layer of the optical cable to achieve a self-supporting effect. The sheath layer used in the present invention is a protective layer prepared from silicone resin as the main raw material. The interaction between specific proportions of glass flake powder and mica powder effectively improves the wear resistance of the coating, and the silicone resin is ground with the glass flake powder and mica powder in batches to improve the dispersibility of the powder in the silicone resin, thereby improving the wear resistance of the protective layer.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A method for preparing a self-supporting optical cable with strong wear resistance, characterized in that, It includes the following preparation steps: (1) Put cassava starch into an oven for drying. Then, mix the dried cassava starch with glucose and place them in a ball mill. After grinding for 2 - 5 h, add 70% ethanol aqueous solution until the concentration of cassava starch is 0.5 - 1.1 g / 100 mL, and continue grinding for 4 - 6 h to obtain an activated starch solution; (2) Completely immerse the cable core in the activated starch solution, carry out ultrasonic treatment at 20 kHz for 20 min, then let it stand for 40 min. Repeat the above process 3 - 5 times, take it out, and dry it at room temperature for 4 - 6 h to obtain a cable core loaded with starch; (3) Place the cable core loaded with starch in a reaction chamber, carry out carbonization and graphitization at a reaction chamber pressure of 5 - 10 kPa, 550 - 650 °C, and in an argon atmosphere for 4 - 6 h to obtain a cable core with a graphene layer; (4) Put silicone resin, ethyl acetate, glass flake powder, and bis - aminotrimethoxysilane into a three - roll mill for grinding and dispersion 2 times, with each grinding time being 60 min and the distance between adjacent rolls being 50 μm to obtain material A; put silicone resin, n - butyl acetate, mica powder, and bis - aminotrimethoxysilane into a three - roll mill for grinding and dispersion 2 times, with each grinding time being 60 min and the distance between adjacent rolls being 25 μm to obtain material B; mix material A and material B in a mass ratio of 1:1 - 2, stir evenly, and then add 0.5 - 1.5% dibutyltin dilaurate based on the total mass of the materials to obtain a protective layer coating; (5) Uniformly apply the protective layer coating on the cable core with a graphene layer and cure it at room temperature for 24 h to obtain a self - supporting optical cable with strong wear resistance.

2. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that In step (1), the drying is carried out until the moisture content is 6%.

3. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that, In step (1), the temperature of the oven is 45 °C.

4. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that In step (1), the mass ratio of the dried cassava starch to glucose is 100:2.5 - 10.

5. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that, In step (1), the grinding conditions are: rotation speed 40 r / min, and the mass ratio of balls to materials is 3:

1.

6. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that, In step (4), for each raw material component in material A by mass fraction, silicone resin is 20 - 30 parts, ethyl acetate is 22 - 34 parts, glass flake powder is 5 - 10 parts, and bis - aminotrimethoxysilane is 1 - 3 parts.

7. The preparation method of a self-supporting optical cable with strong wear resistance according to claim 1, characterized in that, In step (4), the silicone resin is a hydroxyl - containing polydimethylsiloxane resin, and the hydroxyl content is 0.5 - 1%.

8. The preparation method of a self-supporting optical cable with strong abrasion resistance according to claim 1, characterized in that, In step (4), for each raw material component in material B by mass fraction, silicone resin is 20 - 30 parts, n - butyl acetate is 22 - 34 parts, mica powder is 5 - 10 parts, and bis - aminotrimethoxysilane is 1 - 3 parts.