Cable for deep sea

Abstract

The invention discloses a mooring rope for deep sea. The mooring rope is coated with a coating of modified graphene containing # imgabs0 # groups. The cable has the beneficial effects that the cable prepared by the invention still has good insulativity and mechanical property after being in a high-pressure and low-temperature seawater environment for a long time, excellent electrical performance and signal transmission function can be kept, and the electrical performance and the signal transmission function are stable.

Description

Technical Field

[0001] The invention belongs to the technical field of deep-sea cables, and in particular relates to a deep-sea cable. Background Art

[0002] Deep-sea cables play a vital role in the fields of marine engineering and scientific exploration. They are used to connect and fix various deep-sea equipment. For example, deep-sea cables are an indispensable tool in marine scientific exploration. It is often used to connect deep-sea buoys, buoys and other observation equipment to conduct long-term and continuous monitoring of the marine environment. These cables need to withstand the harsh environment of high pressure, low temperature and corrosion of seawater in the deep sea, so they must have high strength, corrosion resistance and low creep. For example, Kevlar buoy cable is a special cable made of high-strength synthetic fiber, which is widely used in the field of marine scientific exploration; deep-sea cables also play an important role in the development of deep-sea resources. They are used to connect deep-sea mining equipment, oil drilling platforms, etc. to ensure that these equipment can operate stably and safely in deep-sea environments. These cables not only need to have high strength and corrosion resistance, but also need to be able to withstand the high pressure and low temperature environment of the deep sea. For example, in the construction of deep-sea oil and gas field operating platforms, high-performance polyester cables are often used as mooring cables to ensure the stability and safety of the platform; deep-sea cables are also widely used in marine engineering. They are used to fix offshore facilities such as drilling platforms, floating production platforms and auxiliary offshore platforms. These cables need to withstand the impact of natural forces such as wind and waves, tides, and corrosion and wear from seawater. Therefore, they must have high strength, wear resistance, corrosion resistance and fatigue resistance. Traditionally, offshore engineering mooring cables mostly use steel wire ropes, but in recent years, with the development of synthetic fiber materials, high-performance synthetic fiber mooring cables have gradually replaced steel wire ropes and become the mainstream choice for offshore engineering mooring cables; deep-sea cables are also widely used in other fields. For example, in offshore lifting operations, deep-sea cables are used as lifting rigging to connect cranes and hoisted objects; in marine fisheries, deep-sea cables are used as the backbone of fishing nets to withstand the pull of fish schools and the impact of waves.

[0003] In addition, some deep-sea cables also undertake the important task of transmitting power, signals and data. In the deep-sea environment, various scientific survey equipment, resource development equipment and marine engineering facilities require stable and reliable power supply and signal transmission. Among them, deep-sea rescue cables provide stable power supply for rescue equipment such as submersibles, underwater robots, underwater lighting equipment, underwater communication equipment, etc. under the harsh conditions of high pressure, low temperature and corrosion in the deep-sea environment. These equipment play a vital role in deep-sea rescue, and stable power supply is the basis for their normal operation; the signal lines contained in deep-sea rescue cables can transmit various rescue-related signals and data. For example, submersibles or underwater robots can transmit sensor data such as images, sounds, temperature, pressure, etc. of the deep-sea environment to the rescue command center in real time through cables, providing rescuers with accurate on-site information and helping them to formulate more effective rescue strategies; deep-sea rescue cables can also be used as a medium for underwater communication to achieve real-time communication between rescuers. In deep-sea rescue operations, smooth communication is essential. Through the communication links established by cables, rescuers can share information and coordinate actions in a timely manner to ensure the successful completion of rescue missions; deep-sea rescue cables are usually safer and more reliable. They are made of special materials and processes and can withstand various challenges in deep-sea environments. In addition, the design of the cable also takes into account the problem of preventing marine organisms from biting and abrasion, thereby ensuring long-term stable operation in deep-sea rescue; moreover, deep-sea cables are laid in the deep sea, connecting observation equipment, mining equipment, drilling platforms, etc. on the seabed, providing them with necessary power and signal support. The transmission function of deep-sea cables is particularly important for deep-sea scientific expeditions. Scientists can monitor the data of the deep-sea environment in real time, such as temperature, pressure, salinity, flow rate, etc., through the observation equipment connected by the cable. These data are of great significance for understanding the marine ecosystem, climate change, and resource distribution.

[0004] However, there are many problems in the use of deep-sea cables at present, such as the external force of ships and marine foreign objects that can damage the cables; marine resources can also corrode the cable armor, including complex corrosion mechanisms such as photoelectrocatalysis and microbial action, and sea washing can damage the anti-corrosion layer of the cable armor and accelerate the corrosion of the armor raw materials; deep-sea power cables need to withstand tremendous pressure from seawater, especially in deep-sea areas. The cables need to operate stably in the deep-sea environment to avoid cable breakage or performance degradation due to pressure, and in polar or cold waters, the cables also need to withstand extreme low temperatures and high pressures. In such environments, the cables may freeze inside, destroying the stability of power transmission; and deep-sea power cable routes are usually tens of kilometers long or even longer. Once damaged, it takes a long time and is difficult to find the fault point and perform salvage and repair.

[0005] To solve the existing problem, we propose a deep-sea cable. Summary of the invention

[0006] The object of the present invention is to provide a deep-sea cable to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A deep sea cable coated with

[0009]

[0010] Group-modified graphene coatings.

[0011] Preferably, the raw materials for modified graphene include:

[0012]

[0013] Preferably, the preparation process of modified graphene includes:

[0014] S1: immersing graphene in a water bath filled with hydrogen peroxide solution, shaking at a constant temperature, and after the reaction is completed, filtering and drying to obtain graphene oxide;

[0015] S2: Add appropriate amount of graphene oxide and ethylene glycol into a reactor and stir evenly, then add sodium acetate and ethylenediamine hydrochloride in sequence, and after the reaction, wash with water and dry in vacuum to obtain amino graphene;

[0016] S3: adding appropriate amounts of amination-modified graphene, cinnamaldehyde solution and catalyst into a reaction kettle, and extracting to obtain modified graphene;

[0017] Preferably, the process conditions of step S1 are: stirring at a speed of 100-500 r / min, a temperature of 30-80° C., a treatment time of 1-12 h, and a concentration of hydrogen peroxide of 0.1-0.5 mol / L.

[0018] Preferably, the process conditions of step S2 are a temperature of 150-220° C. and a treatment time of 2-10 h; and the reaction conditions of step S3 are a temperature of 50-100° C. and a treatment time of 0.5-2 h.

[0019] Preferably, the catalyst may be acetic acid, ammonium bromide, tributyl ammonium phosphate or ammonium chloride.

[0020] Preferably, the raw materials for preparing the coating include modified graphene, a dispersant, tri(o-tolyl)phosphine, polyethylene glycol, diphenylmethane diisocyanate, dimethylolpropionic acid, an epoxy resin, dibutyltin dilaurate, and a chain extender.

[0021] Preferably, the preparation process of the modified graphene coating comprises:

[0022] T1: immerse the graphene in a water bath filled with hydrogen peroxide solution, shake at a constant temperature, and after the reaction is completed, filter and dry to obtain graphene oxide;

[0023] T2: Add appropriate amount of graphene oxide and ethylene glycol into a reactor and stir evenly, then add sodium acetate and ethylenediamine hydrochloride in sequence, wash with water and vacuum dry after the reaction to obtain amino graphene;

[0024] T3: Add appropriate amount of amination graphene, cinnamaldehyde solution and catalyst into a reactor, extract and dry to obtain modified graphene;

[0025] T4: putting an appropriate amount of modified graphene, a dispersant, tri(o-tolyl)phosphine and water into an emulsifier to prepare a graphene solution;

[0026] T5: PEG and diphenylmethane diisocyanate are put into a reaction kettle, stirred evenly, dimethylolpropionic acid, dibutyltin dilaurate, epoxy resin, and chain extender are added, and a polyurethane emulsion is obtained after a reaction for a period of time;

[0027] T6: Add the graphene solution prepared in T4 to the polyurethane emulsion prepared in C2, stir and ultrasonicate, and immerse the prefabricated cable in the coating at a temperature of 100-150°C for 10-30 minutes, and cool down to obtain the finished cable.

[0028] Preferably, in step T4, the speed of the emulsifier is 1000-2000 r / min, and the processing time is 0.5-1 h.

[0029] Preferably, the process reactor of step T5 is under a nitrogen protection environment, with a stirring speed of 200-500 r / min, a stirring time of 20-40 min, a reaction temperature of 50-100° C., and a reaction time of 0.5-5 h.

[0030] Preferably, the dispersant is sodium diphenylamine sulfonate or sodium poly (4-styrene sulfonate).

[0031] Compared with the prior art, the beneficial effects of the present invention are: the cable prepared by the present invention still has good insulation and mechanical properties after a long time in a high-pressure, low-temperature seawater environment, and can maintain excellent electrical performance and signal transmission functions, and the electrical performance and signal transmission functions are stable. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] Preparation of modified graphene:

[0035] S1: 10 parts of graphene are immersed in a water bath containing 20 parts of a 0.1 mol / L hydrogen peroxide solution, stirred at a speed of 100 r / min, shaken at a constant temperature of 30°C, and treated for 1 hour. After the reaction is completed, the mixture is filtered and dried to obtain graphene oxide;

[0036] S2: 10 parts of graphene oxide and 20 parts of ethylene glycol were added into a reactor and stirred evenly, and 1 part of sodium acetate and 1 part of ethylenediamine hydrochloride were added in sequence. The process temperature was 150°C and the treatment time was 2 hours. After the reaction was completed, the graphene was washed with water and vacuum dried to obtain amino graphene;

[0037] S3: 10 parts of amino graphene, 3 parts of cinnamaldehyde solution and 0.1 parts of acetic acid were put into a reactor, the process temperature was 50°C, the treatment time was 0.5h, and the modified graphene was obtained by extraction and drying.

[0038] Preparation of cable rope:

[0039] T1: 0.5 parts of modified graphene, 1 part of sodium diphenylamine sulfonate with a concentration of 10%, 1 part of tri(o-tolyl)phosphine and 5 parts of water were put into an emulsifier at a speed of 1000 r / min for 0.5 h to prepare a graphene solution.

[0040] T2: 10 parts of PEG and 30 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 200r / min for 20min, 1 part of dihydroxymethylpropionic acid, 0.5 parts of dibutyltin dilaurate, 0.5 parts of epoxy resin, and 0.2 parts of ethylenediamine were added, and the process conditions were a temperature of 50°C. After treating for 0.5h, a polyurethane emulsion was obtained.

[0041] T3: 10 parts of the graphene solution prepared in T1 are added to 20 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and a pre-extruded cable with a polyethylene protective layer is immersed in the coating, treated at a temperature of 100°C for 10 minutes, and cooled to obtain a finished cable rope.

[0042] Preparation of cable rope:

[0043] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0044] T'3: 10 parts of the graphene solution prepared in T1 were added to 20 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, the polyethylene braided cable was immersed in the coating, treated at a temperature of 100°C for 10 minutes, and cooled to obtain the finished cable rope.

[0045] Embodiment 2:

[0046] S1: 20 parts of graphene are immersed in a water bath containing 60 parts of a 0.5 mol / L hydrogen peroxide solution, stirred at a speed of 500 r / min, shaken at a constant temperature of 80°C, and treated for 12 hours. After the reaction is completed, the graphene oxide is filtered and dried to obtain graphene oxide;

[0047] S2: 20 parts of graphene oxide and 50 parts of ethylene glycol were added into a reactor and stirred evenly, and 2 parts of sodium acetate and 2 parts of ethylenediamine hydrochloride were added in sequence. The process temperature was 220°C and the treatment time was 10 hours. After the reaction, the graphene was washed with water and dried in vacuum to obtain amino graphene;

[0048] S3: 20 parts of amino graphene, 5 parts of cinnamaldehyde solution, and 1 part of ammonium bromide phosphate tributyl ammonium ester are put into a reactor, the process temperature is 100° C., the treatment time is 2 h, and the modified graphene is obtained by extraction and drying.

[0049] Preparation of cable rope:

[0050] T1: 2 parts of modified graphene, 5 parts of 10% sodium poly (4-styrene sulfonate), 5 parts of tri(o-tolyl)phosphine and 10 parts of water were put into an emulsifier at a speed of 2000 r / min for 1 hour to prepare a graphene solution.

[0051] T2: 20 parts of PEG and 60 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 500r / min for 40min, 5 parts of dihydroxymethylpropionic acid, 3 parts of dibutyltin dilaurate, 2 parts of epoxy resin, and 1 part of diethylenetriamine were added. The process conditions were a temperature of 100°C, and a polyurethane emulsion was obtained after treatment for 0.5-5h.

[0052] T3: 20 parts of the graphene solution prepared in T1 are added to 40 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and the pre-extruded cable with a polyethylene protective layer is immersed in the coating, treated at a temperature of 150°C for 30 minutes, and cooled to obtain a finished cable.

[0053] Preparation of cable rope:

[0054] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0055] T'3: 20 parts of the graphene solution prepared in T1 were added to 40 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, the polyethylene braided cable was immersed in the coating, treated at a temperature of 150°C for 30 minutes, and cooled to obtain the finished cable.

[0056] Embodiment 3:

[0057] S1: 14 parts of graphene are immersed in a water bath containing 50 parts of a 0.3 mol / L hydrogen peroxide solution, stirred at a speed of 300 r / min, shaken at a constant temperature of 40°C, and treated for 5 hours. After the reaction is completed, the mixture is filtered and dried to obtain graphene oxide;

[0058] S2: 15 parts of graphene oxide and 30 parts of ethylene glycol were added into a reactor and stirred evenly, and 1.4 parts of sodium acetate and 1.2 parts of ethylenediamine hydrochloride were added in sequence. The process temperature was 180°C and the treatment time was 7 hours. After the reaction, the graphene was washed with water and vacuum dried to obtain amino graphene;

[0059] S3: 16 parts of amination graphene, 3.5 parts of cinnamaldehyde solution and 0.7 parts of ammonium chloride were put into a reactor, the process temperature was 70°C, the treatment time was 0.9h, and the modified graphene was obtained by extraction and drying.

[0060] Preparation of cable rope:

[0061] T1: 1.2 parts of modified graphene, 3 parts of sodium diphenylamine sulfonate with a concentration of 15%, 3 parts of tri(o-tolyl)phosphine and 7 parts of water were put into an emulsifier at a speed of 1500 r / min for 0.8 h to prepare a graphene solution.

[0062] T2: 13 parts of PEG and 45 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 300r / min for 35min, 2.5 parts of dihydroxymethylpropionic acid, 1.5 parts of dibutyltin dilaurate, 1 part of epoxy resin, 0.8 parts of 1,6-hexanediol were added, the process condition was a temperature of 0°C, and a polyurethane emulsion was obtained after treating for 2h.

[0063] T3: 15 parts of the graphene solution prepared in T1 are added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and a pre-extruded cable rope with a polyethylene protective layer is immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain a finished cable rope.

[0064] Preparation of cable rope:

[0065] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0066] T'3: 15 parts of the graphene solution prepared in T1 were added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, the polyethylene braided cable rope was immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain the finished cable rope.

[0067] Comparative Example 1:

[0068] T1: 1.2 parts of graphene, 3 parts of sodium diphenylamine sulfonate with a concentration of 15%, 3 parts of tri(o-tolyl)phosphine and 7 parts of water were put into an emulsifier at a speed of 1500 r / min for 0.8 h to prepare a graphene solution.

[0069] T2: 13 parts of PEG and 45 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 300r / min for 35min, 2.5 parts of dihydroxymethylpropionic acid, 1.5 parts of dibutyltin dilaurate, 1 part of epoxy resin, 0.8 parts of 1,6-hexanediol were added, the process condition was a temperature of 0°C, and a polyurethane emulsion was obtained after treating for 2h.

[0070] T3: 15 parts of the graphene solution prepared in T1 are added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and a pre-extruded cable with a polyethylene protective layer is immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain a finished cable.

[0071] Preparation of cable rope:

[0072] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0073] T'3: 15 parts of the graphene solution prepared in T1 were added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and the polyethylene braided cable rope was immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain the finished cable rope.

[0074] Comparative Example 2:

[0075] S1: 14 parts of graphene are immersed in a water bath containing 50 parts of a 0.3 mol / L hydrogen peroxide solution, stirred at a speed of 300 r / min, shaken at a constant temperature of 40°C, and treated for 5 hours. After the reaction is completed, the mixture is filtered and dried to obtain graphene oxide;

[0076] S2: 15 parts of graphene oxide and 30 parts of ethylene glycol were added into a reactor and stirred evenly, and 1.4 parts of sodium acetate and 1.2 parts of ethylenediamine hydrochloride were added in sequence. The process temperature was 180°C and the treatment time was 7 hours. After the reaction, the graphene was washed with water and vacuum dried to obtain amino graphene;

[0077] S3: 16 parts of amination graphene, 3.5 parts of benzaldehyde solution and 0.7 parts of ammonium chloride were put into a reactor, the process temperature was 70°C, the treatment time was 0.9h, and the modified graphene was obtained by extraction and drying.

[0078] Preparation of cable rope:

[0079] T1: 1.2 parts of modified graphene, 3 parts of sodium diphenylamine sulfonate with a concentration of 15%, 3 parts of tri(o-tolyl)phosphine and 7 parts of water were put into an emulsifier at a speed of 1500 r / min for 0.8 h to prepare a graphene solution.

[0080] T2: 13 parts of PEG and 45 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 300r / min for 35min, 2.5 parts of dihydroxymethylpropionic acid, 1.5 parts of dibutyltin dilaurate, 1 part of epoxy resin, 0.8 parts of 1,6-hexanediol were added, the process condition was a temperature of 0°C, and a polyurethane emulsion was obtained after treating for 2h.

[0081] T3: 15 parts of the graphene solution prepared in T1 are added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and a pre-extruded cable with a polyethylene protective layer is immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain a finished cable.

[0082] Preparation of cable rope:

[0083] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0084] T'3: 15 parts of the graphene solution prepared in T1 were added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, the polyethylene braided cable rope was immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain the finished cable rope.

[0085] Comparative Example 3:

[0086] S1: 14 parts of graphene are immersed in a water bath containing 50 parts of a 0.3 mol / L hydrogen peroxide solution, stirred at a speed of 300 r / min, shaken at a constant temperature of 40°C, and treated for 5 hours. After the reaction is completed, the mixture is filtered and dried to obtain graphene oxide;

[0087] S2: 15 parts of graphene oxide and 30 parts of ethylene glycol were added into a reactor and stirred evenly, and 1.4 parts of sodium acetate and 1.2 parts of ethylenediamine hydrochloride were added in sequence. The process temperature was 180°C and the treatment time was 7 hours. After the reaction, the graphene was washed with water and vacuum dried to obtain amino graphene;

[0088] S3: 16 parts of amination graphene, 3.5 parts of cinnamaldehyde solution and 0.7 parts of ammonium chloride were put into a reactor, the process temperature was 70°C, the treatment time was 0.9h, and the modified graphene was obtained by extraction and drying.

[0089] Preparation of cable rope:

[0090] T1: 1.2 parts of modified graphene, 3 parts of sodium diphenylamine sulfonate with a concentration of 15% and 7 parts of water were put into an emulsifier at a speed of 1500 r / min for 0.8 h to prepare a graphene solution.

[0091] T2: 13 parts of PEG and 45 parts of diphenylmethane diisocyanate were put into a reactor under nitrogen protection environment, stirred at a speed of 300r / min for 35min, 2.5 parts of dihydroxymethylpropionic acid, 1.5 parts of dibutyltin dilaurate, 1 part of epoxy resin, 0.8 parts of 1,6-hexanediol were added, the process condition was a temperature of 0°C, and a polyurethane emulsion was obtained after treating for 2h.

[0092] T3: 15 parts of the graphene solution prepared in T1 are added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and a pre-extruded cable with a polyethylene protective layer is immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain a finished cable.

[0093] Preparation of cable rope:

[0094] T'1 and T'2 are the same as T1 and T2 of this embodiment.

[0095] T'3: 15 parts of the graphene solution prepared in T1 were added to 30 parts of the polyurethane emulsion prepared in T2, stirred and ultrasonicated, and the polyethylene braided cable rope was immersed in the coating, treated at a temperature of 120°C for 20 minutes, and cooled to obtain the finished cable rope.

[0096] Cable performance test method:

[0097] Take 15 pieces of cable ropes and wire ropes prepared in Examples 1-3 and Comparative Examples 1-3, respectively, and place them in a test device filled with seawater at a pressure of 50 MPa and a temperature of -10°C. After each test for 6 hours, stop for 15 minutes and repeat the cycle in sequence. Test the fatigue test performance of 5 cable ropes in the initial state, 5 pieces after 24 hours and 5 pieces after 360 hours; and test the average breaking strength of 5 cable ropes in the initial state, 5 pieces after 24 hours and 5 pieces after 360 hours.

[0098] Table 1 Test results (cable rope)

[0099]

[0100] From the results in Table 1, it can be seen that both Examples 1-3 and Comparative Examples 1-3 show weakening in fatigue tests at 24h and 360h, indicating that the power supply and communication performance of the cables are weakened after the corresponding treatment.

[0101] It can be seen from the results of Examples 1-3 that, after 24h and 360h of treatment, although the performance of the cable is reduced, the reduction is not obvious.

[0102] From the comparison between Example 3 and Comparative Example 1, it can be seen that initially, the communication performance of Comparative Example 1 and Example 3 is basically the same, but after 24h and 360h tests, the communication function of Comparative Example 1 is reduced, and the reduction in communication function is much greater than that of Examples 1-3.

[0103] From the comparison of Example 3, Comparative Example 1 and Comparative Example 2, it can be seen that initially, the communication performance of Comparative Example 2 and Examples 1-3 is not much different, but deteriorates after 24h and 360h of testing, and the reduction in communication function is much greater than that of Example 3, and the performance of Comparative Example 2 is even worse than that of Comparative Example 1 after 24h and 360h of treatment.

[0104] From the comparison of Example 3, Comparative Example 1, Comparative Example 2, and Comparative Example 3, it can be seen that initially, the communication performance of Comparative Example 3 and Example 3 is basically the same. After 24h and 360h of treatment, although the communication performance of Comparative Example 3 is better than that of Comparative Example 1 and Comparative Example 2, the stability of its communication performance deteriorates.

[0105] Table 2 Test results (cable rope)

[0106]

[0107] The results of Examples 1-3 show that the mechanical properties of the cable ropes do not change much after being treated for 24 hours and 360 hours.

[0108] Comparison between Example 3 and Comparative Example 1 shows that the mechanical properties of Comparative Example 1 are significantly lower than those of Example 3 after being treated for 24 hours and 360 hours.

[0109] Comparison between Example 3 and Comparative Example 2 shows that the mechanical properties of Comparative Example 2 are significantly lower than those of Example 3 after being treated for 24 hours and 360 hours.

[0110] Comparison of Example 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3 shows that after being treated for 24 hours and 360 hours, although the mechanical properties of Comparative Example 3 are significantly lower than those of Example 3, they are better than Comparative Examples 1 and 2.

[0111] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep sea cable, characterized in that: The cable is coated with Group-modified graphene coatings.

2. A deep sea cable according to claim 1, characterized in that: The raw materials for modified graphene include:

3. A deep sea cable according to claim 1, characterized in that: The preparation process of the modified graphene comprises: S1: immersing graphene in a water bath filled with hydrogen peroxide solution, shaking at a constant temperature, and after the reaction is completed, filtering and drying to obtain graphene oxide; S2: Add appropriate amount of graphene oxide and ethylene glycol into a reactor and stir evenly, then add sodium acetate and ethylenediamine hydrochloride in sequence, and after the reaction, wash with water and dry in vacuum to obtain amino graphene; S3: Put appropriate amounts of amination graphene, cinnamaldehyde solution and catalyst into a reactor, and extract to obtain modified graphene.

4. A deep sea cable according to claim 3, characterized in that: The process conditions of step S1 are: stirring at a speed of 100-500 r / min, a temperature of 30-80° C., and a treatment time of 1-12 h during the reaction process; and the concentration of the hydrogen peroxide is 0.1-0.5 mol / L.

5. A deep sea cable according to claim 3, characterized in that: The process conditions of step S2 are as follows: temperature of 150-220° C. and treatment time of 2-10 h; the reaction conditions of step S3 are as follows: temperature of 50-100° C. and treatment time of 0.5-2 h.

6. A deep sea cable according to claim 2, characterized in that: The catalyst may be acetic acid, ammonium bromide, tributyl ammonium phosphate or ammonium chloride.

7. A deep sea cable according to claim 2, characterized in that: The raw materials for preparing the coating include modified graphene, a dispersant, tri(o-tolyl)phosphine, polyethylene glycol, diphenylmethane diisocyanate, dimethylolpropionic acid, epoxy resin, dibutyltin dilaurate, and a chain extender.

8. A deep sea cable according to claim 1, characterized in that: The preparation process of the modified graphene coating comprises: T1: immerse the graphene in a water bath filled with hydrogen peroxide solution, shake at a constant temperature, and after the reaction is completed, filter and dry to obtain graphene oxide; T2: Add appropriate amount of graphene oxide and ethylene glycol into a reactor and stir evenly, then add sodium acetate and ethylenediamine hydrochloride in sequence, wash with water and vacuum dry after the reaction to obtain amino graphene; T3: Add appropriate amount of amination graphene, cinnamaldehyde solution and catalyst into a reactor, extract and dry to obtain modified graphene; T4: putting an appropriate amount of modified graphene, dispersant, tri(o-tolyl)phosphine and water into an emulsifier to prepare a graphene solution; T5: PEG and diphenylmethane diisocyanate are put into a reaction kettle, stirred evenly, dimethylolpropionic acid, dibutyltin dilaurate, epoxy resin, and chain extender are added, and a polyurethane emulsion is obtained after a reaction for a period of time; T6: Add the graphene solution prepared in T4 to the polyurethane emulsion prepared in C2, stir and ultrasonicate, and immerse the prefabricated cable in the coating at a temperature of 100-150°C for 10-30 minutes, and cool down to obtain the finished cable.

9. A deep sea cable according to claim 1, characterized in that: The process reactor of step T5 is under nitrogen protection environment, with a stirring speed of 200-500 r / min, a stirring time of 20-40 min, a reaction temperature of 50-100° C., and a reaction time of 0.5-5 h.

10. A deep sea cable according to claim 7, characterized in that: The dispersant is sodium diphenylamine sulfonate or sodium poly 4-styrene sulfonate.

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