Silicone rubber material, preparation method thereof and cable

Abstract

The invention provides a silicone rubber material, a preparation method thereof and a cable. The silicone rubber material comprises the following components in percentage by mass: 67.09 to 90.28 percent of polysiloxane; 3.86% to 11.35% of an initiator; 3.84% to 12.38% of a repairing agent; 2.02 to 9.18% of a catalyst; the initiator is included in the first microcapsule, the repairing agent is included in the second microcapsule, and the catalyst is included in the first microcapsule or the second microcapsule. When the silicone rubber material is damaged and cracks are generated, the shells of the first microcapsule and the second microcapsule are broken, the initiator, the repairing agent and the catalyst are released due to siphoning, the initiator and the repairing agent are subjected to chemical reaction under the action of the catalyst, new polysiloxane rubber is generated at the damaged crack, and the silicone rubber material is repaired. Therefore, the damaged crack structure is repaired in time, and the mechanical properties, physical properties and the like of the silicone rubber material are repaired to a certain extent. In addition, due to the addition of the first microcapsules and the second microcapsules, the silicone rubber material is reinforced and toughened, and the physical and mechanical properties of the silicone rubber material are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of composite materials, and in particular to a silicone rubber material and a preparation method and a cable thereof. Background Art

[0002] At present, due to the influence of external factors and their own aging, the outer protective materials used in various cables will inevitably produce some micro-cracks or scratches during use. These cracks may even expand over time, thereby affecting the electrical performance, physical properties and service life of the product, which will not only cause economic losses, but also be detrimental to the environment. For example, with the popularization of fast charging technology, the wire diameter of electronic equipment data cables is also increasing, so the force-bearing area of ​​the cable increases, making it more prone to surface scratches. Summary of the invention

[0003] In order to solve the problems existing in the related art, the present disclosure provides a silicone rubber material and a preparation method thereof, and a cable.

[0004] According to a first aspect of an exemplary embodiment of the present disclosure, a silicone rubber material is provided, wherein the silicone rubber material comprises the following components expressed in mass percentage:

[0005]

[0006] The initiator is included in the first microcapsule, the repairing agent is included in the second microcapsule, and the catalyst is included in the first microcapsule or the second microcapsule.

[0007] In some exemplary embodiments, a first preset mass ratio of the catalyst to the repair agent is 1:1.23 to 1:1.86.

[0008] In some exemplary embodiments, the second preset mass ratio of the initiator to the repair agent is 1:0.89 to 1:2.03.

[0009] In some exemplary embodiments, the polysiloxane includes at least one of polydimethylsiloxane, polyethylmethylsiloxane, and polyvinylsiloxane.

[0010] In some exemplary embodiments, the initiator is a polysiloxane having active sites.

[0011] In some exemplary embodiments, the polysiloxane having active sites includes at least one of polydimethylsiloxane having active sites, polyethylmethylsiloxane having active sites, and polyvinylsiloxane having active sites.

[0012] In some exemplary embodiments, the repair agent is a vinyl terminated polysiloxane.

[0013] In some exemplary embodiments, the vinyl-terminated polysiloxane includes at least one of vinyl-terminated polydimethylsiloxane, vinyl-terminated polyethylmethylsiloxane, and vinyl-terminated polyvinylsiloxane.

[0014] In some exemplary embodiments, the catalyst includes a platinum catalyst.

[0015] In some exemplary embodiments, the shell materials of the first microcapsule and the second microcapsule are both thermosetting resin.

[0016] In some exemplary embodiments, the thermosetting resin includes polyurea-formaldehyde.

[0017] In some exemplary embodiments, the diameters of the first microcapsule and the second microcapsule are both 170-190 μm.

[0018] In some exemplary embodiments, the shell thickness of the first microcapsule and the second microcapsule are both 100-200 nm.

[0019] According to a second aspect of an exemplary embodiment of the present disclosure, a method for preparing a silicone rubber material is provided. The method is used to prepare the above-mentioned silicone rubber material, and the method comprises:

[0020] According to the mass percentage of the components of the silicone rubber material, the first microcapsule and the second microcapsule are added to the polysiloxane, stirred and mixed to obtain the silicone rubber material.

[0021] In some exemplary embodiments, the preparation method further comprises: forming the silicone rubber material into a silicone rubber material having a preset shape by extruding or calendering the silicone rubber material.

[0022] According to a third aspect of an exemplary embodiment of the present disclosure, a cable is provided, wherein a protective layer of the cable includes the above-mentioned silicone rubber material.

[0023] In some exemplary embodiments, the cable further comprises:

[0024] A shielding layer, wherein the protective layer covers the shielding layer, and the shielding layer includes an inner cavity enclosed in a circumferential direction;

[0025] A first preset number of metal core wires are arranged in the inner cavity, and the outer surface of each metal core wire is wrapped with an insulating layer; the first preset number is greater than or equal to 1.

[0026] In some exemplary embodiments, the cable further includes: a second preset number of filling lines, wherein the filling lines are disposed in the inner cavity; and the second preset number is greater than or equal to 1.

[0027] In some exemplary embodiments, the shielding layer includes:

[0028] A first shielding layer, wherein the first shielding layer is a conductive shielding layer;

[0029] The second shielding layer is a metal wire shielding layer; the second shielding layer covers the first shielding layer, and the first shielding layer surrounds the inner cavity in a circumferential direction.

[0030] The beneficial effects of the present disclosure include but are not limited to: the silicone rubber material provided by the present disclosure uses 67.09-90.28% of polysiloxane rubber as a matrix, and first microcapsules wrapped with 3.86-11.35% of an initiator and second microcapsules wrapped with 3.84-12.38% of a repairing agent are added to the polysiloxane rubber matrix, and 2.02-9.18% of a catalyst is also wrapped in the first microcapsule or the second microcapsule. When the silicone rubber material is damaged and cracks are generated, the damaged cracks will cause the shells of the first microcapsule and the second microcapsule to rupture, and the initiator, the repairing agent and the catalyst will be released due to the siphon effect. Under the catalytic action of the catalyst, the initiator and the repairing agent can react chemically at room temperature, and new polysiloxane rubber is generated at the damaged crack, thereby timely repairing the damaged crack structure, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired to a certain extent, and the "self-repairing" effect is achieved. In addition, the addition of the first microcapsules and the second microcapsules will also strengthen and toughen the silicone rubber material itself, improve the physical and mechanical properties of the silicone rubber material, such as tear resistance, and reduce the possibility of damage or cracks in the silicone rubber material during production, use or transfer.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of a stress-strain curve of a silicone rubber material according to an exemplary embodiment of the present disclosure;

[0034] Figure 2 It is a schematic cross-sectional view of a cable according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the technical solution of the present disclosure will be clearly and completely described in combination with the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0036] In production and life, the outer sheath of most cables is made of materials such as TPE and TPU, but these materials are generally not scratch-resistant and are often damaged or cracked during production, use or transfer, which affects the appearance of the cable products and even the function and service life of the cable products.

[0037] Based on this, an exemplary embodiment of the present disclosure provides a silicone rubber material, which includes the following components expressed in mass percentage: 67.09-90.28% polysiloxane; 3.86-11.35% initiator; 3.84-12.38% repair agent; 2.02-9.18% catalyst; wherein the initiator is included in the first microcapsule, the repair agent is included in the second microcapsule, and the catalyst is included in the first microcapsule or the second microcapsule.

[0038] The exemplary silicone rubber material provided in the present disclosure is based on polysiloxane rubber. The polysiloxane rubber has excellent high and low temperature resistance, and can withstand high temperatures of 300°C and low temperatures of -100°C. The polysiloxane rubber also has good insulation resistance and anti-aging properties. The polysiloxane rubber is skin-friendly, soft, environmentally friendly and non-toxic. A first microcapsule containing an initiator and a second microcapsule containing a repair agent are added to the polysiloxane rubber matrix. At the same time, a catalyst is also contained in the first microcapsule or the second microcapsule. When the silicone rubber material is damaged, cracks are generated. When the first microcapsule and the second microcapsule are ripped, the damage crack will cause the shell of the first microcapsule and the second microcapsule to rupture, and the initiator, repair agent and catalyst will be released due to the siphon effect. Under the catalytic action of the catalyst, the initiator and the repair agent can react chemically at room temperature, and new polysiloxane rubber will be produced at the damage crack, which will repair the damage crack structure in time, so that the mechanical properties and physical properties of the silicone rubber material can be repaired to a certain extent, achieving the effect of "self-repair". For example, the tear strength of the repaired silicone rubber material can be restored to 70%-100% of the initial value. In addition, the addition of the first microcapsule and the second microcapsule will also strengthen and toughen the silicone rubber material itself, improve the physical and mechanical properties of the silicone rubber material, such as tear resistance, and reduce the possibility of damage or cracks in the silicone rubber material during production, use or transfer.

[0039] Taking the mass of the silicone rubber material as the total mass, adding 3.86-11.35% of the initiator, 3.84-12.38% of the repair agent and 2.02-9.18% of the catalyst to 67.09-90.28% of the polysiloxane can ensure that the silicone rubber material has good high and low temperature resistance, insulation resistance and anti-aging performance. At the same time, when the silicone rubber material is damaged and cracks are generated, the initiator and the repair agent can react chemically under the catalytic action of the catalyst, and new polysiloxane rubber is generated at the damaged crack, which repairs the damaged crack structure in time, so that the mechanical properties and physical properties of the silicone rubber material are repaired, and the "self-repairing" effect is achieved. When the silicone rubber material is applied to the outer sheath of the cable, the problem of easy scratches on the outer sheath of the cable can be solved, thereby extending the service life of the cable.

[0040] In the exemplary embodiment provided by the present disclosure, based on the total mass of the silicone rubber material, 4.06-10.08% of the initiator, 4.42-11.25% of the repair agent and 3.56-7.89% of the catalyst can be added to 70.78-87.96% of the polysiloxane. The initiator, the repair agent and the catalyst are included in the first microcapsule and the second microcapsule. Under the above-mentioned addition ratio, when the first microcapsule and the second microcapsule are broken due to the damage of the silicone rubber material to release the initiator, the repair agent and the catalyst, the initiator and the repair agent can quickly undergo a polymerization reaction, thereby repairing the damaged cracks of the silicone rubber material.

[0041] In the exemplary embodiment provided by the present disclosure, based on the total mass of the silicone rubber material, 5.12-8.86% of the initiator, 5.98-10.34% of the repair agent and 4.01-6.93% of the catalyst can be added to 73.87-84.89% of the polysiloxane. The initiator, the repair agent and the catalyst are included in the first microcapsule and the second microcapsule, and are added to the polysiloxane at a better addition ratio, which has a better strengthening and toughening effect on the polysiloxane, thereby obtaining a silicone rubber material with higher tear strength.

[0042] In an exemplary embodiment provided by the present disclosure, the polysiloxane includes at least one of polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane.

[0043] Polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane are all excellent silicone rubbers with good high and low temperature resistance, insulation resistance and aging resistance. Therefore, in the exemplary embodiments provided in the present disclosure, at least one of polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane is selected as the matrix of the silicone rubber material.

[0044] In the exemplary embodiments provided in the present disclosure, the initiator is a polysiloxane having active sites.

[0045] Polysiloxane with active sites is selected as the initiator to be encapsulated in the first microcapsule. The polysiloxane with active sites has strong reactivity. When the silicone rubber material is damaged and cracks are generated, the damaged cracks cause the first microcapsule to rupture and the initiator to be released. At the same time, the second microcapsule will also be ruptured and the repair agent will be released. The catalyst encapsulated in the first microcapsule or the second microcapsule will also be released. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction, and new polysiloxane rubber is produced at the damaged crack, which repairs the damaged crack structure in time, so that the mechanical properties and physical properties of the silicone rubber material are repaired to a certain extent, thereby achieving a "self-repairing" effect.

[0046] In an exemplary embodiment provided by the present disclosure, the polysiloxane having active sites includes at least one of polydimethylsiloxane having active sites, polyethylmethylsiloxane having active sites, and polyvinylsiloxane having active sites.

[0047] Polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane are all excellent silicone rubbers with good high and low temperature resistance, insulation resistance and aging resistance. In the exemplary embodiments provided in the present disclosure, at least one of polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane is selected as the matrix of the silicone rubber material, and at least one of polydimethylsiloxane with active sites, polyethylmethylsiloxane with active sites and polyvinylsiloxane with active sites is also selected as an initiator. When the silicone rubber material is damaged and cracks are generated, the first microcapsule and the second microcapsule are ruptured. Under the catalytic action of the catalyst, new polydimethylsiloxane rubber, polyethylmethylsiloxane rubber or polyvinylsiloxane rubber is generated at the damaged crack, and the damaged crack structure is repaired in time, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired, achieving the effect of "self-repairing".

[0048] In an exemplary embodiment provided by the present disclosure, the repair agent is a vinyl terminated polysiloxane.

[0049] Vinyl-terminated polysiloxane is selected as the repair agent and is encapsulated in the second microcapsule. When the silicone rubber material is damaged and cracks are generated, the damage cracks cause the second microcapsule to rupture and the repair agent to be released. At the same time, the first microcapsule will also rupture and the initiator will be released. The catalyst encapsulated in the first microcapsule or the second microcapsule will also be released. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction, and new polysiloxane rubber is produced at the damaged crack, which repairs the damaged crack structure in time, so that the mechanical properties and physical properties of the silicone rubber material are repaired to a certain extent, achieving a "self-repairing" effect.

[0050] In an exemplary embodiment provided by the present disclosure, the vinyl-terminated polysiloxane includes at least one of vinyl-terminated polydimethylsiloxane, vinyl-terminated polyethylmethylsiloxane, and vinyl-terminated polyvinylsiloxane.

[0051] Polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane are all excellent silicone rubbers with good high and low temperature resistance, insulation resistance and aging resistance. In the exemplary embodiments provided in the present disclosure, at least one of polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane is selected as the matrix of the silicone rubber material, and at least one of vinyl-terminated polydimethylsiloxane, vinyl-terminated polyethylmethylsiloxane and vinyl-terminated polyvinylsiloxane is also selected as a repair agent. When the silicone rubber material is damaged and cracks are generated, the first microcapsule and the second microcapsule are ruptured. Under the catalytic action of the catalyst, new polydimethylsiloxane rubber, polyethylmethylsiloxane rubber or polyvinylsiloxane rubber is generated at the damaged crack, and the damaged crack structure is repaired in time, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired, achieving a "self-repairing" effect.

[0052] It should be noted that in the exemplary embodiments provided in the present disclosure, the side chain substituents on the selected polysiloxane polymer are not necessarily the same as the side chain substituents on the selected repair agent polymer and initiator polymer. For example, when the polysiloxane is polydimethylsiloxane, the initiator may be polydimethylsiloxane with active sites, or polyethylmethylsiloxane with active sites or polyvinylsiloxane with active sites, and the repair agent may be vinyl-terminated polydimethylsiloxane, or vinyl-terminated polyethylmethylsiloxane or vinyl-terminated polyvinylsiloxane.

[0053] In an exemplary embodiment provided by the present disclosure, the catalyst includes a platinum catalyst.

[0054] Platinum catalysts can efficiently catalyze the reaction of polysiloxanes with active sites and vinyl-terminated polysiloxanes at room temperature to form new polysiloxanes, which can repair damaged silicone rubber materials in a timely manner. No by-products are produced during the reaction, the shrinkage rate is small, and deep curing can be achieved.

[0055] In an exemplary embodiment provided by the present disclosure, a first preset mass ratio of the catalyst to the repair agent is 1:1.23 to 1:1.86.

[0056] The catalyst can be included in the first microcapsule together with the initiator, or in the second microcapsule together with the repairing agent. It can also be dispersed and included in the first microcapsule and the second microcapsule, that is, a part of the catalyst can be included in the first microcapsule together with the initiator, and then the other part can be included in the second microcapsule together with the repairing agent. In any case, the first preset mass ratio of the catalyst and the repairing agent can be 1:1.23 to 1:1.86. In addition, the third preset mass ratio of the catalyst and the initiator can be 1:0.92 to 1:1.38.

[0057] When the catalyst and the repair agent are at a first preset mass ratio of 1:1.23 to 1:1.86, when the silicone rubber material is damaged and cracks are generated, the damaged cracks cause the first microcapsules and the second microcapsules to rupture, and the initiator, the repair agent and the catalyst are released due to the siphon effect. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction, and new polysiloxane rubber is produced at the damaged crack, which promptly repairs the damaged crack structure, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired to a certain extent, thereby achieving a "self-repairing" effect.

[0058] In the exemplary embodiment provided by the present disclosure, the first preset mass ratio of the catalyst and the repair agent can be 1:1.34 to 1:1.79. The catalyst and the repair agent are added to the polysiloxane in an appropriate mass ratio to prepare the silicone rubber material. When the silicone rubber material is damaged and cracks are generated, the catalyst can play a catalytic role to make the repair agent and the initiator quickly undergo polymerization reaction to repair the damaged cracks of the silicone rubber material, thereby avoiding the waste caused by too high a mass content of the catalyst, and also avoiding the catalyst content being too low, which is insufficient in the catalytic effect on the polymerization reaction of the repair agent and the initiator and cannot react quickly to repair the damaged cracks of the silicone rubber material.

[0059] In the exemplary embodiments provided in the present disclosure, the first preset mass ratio of the catalyst and the repair agent can be 1:1.41 to 1:1.72. Within this first preset mass ratio range, without wasting the amount of catalyst, when the silicone rubber material is damaged and cracks are generated, the catalyst has a higher catalytic efficiency and a better catalytic effect in the polymerization reaction of the repair agent and the initiator.

[0060] When the catalyst and the initiator are at a third preset mass ratio of 1:0.92 to 1:1.38, when the silicone rubber material is damaged and cracks are generated, the damaged cracks cause the first microcapsule and the second microcapsule to rupture, and the initiator, the repair agent and the catalyst are released due to the siphon effect. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction, and new polysiloxane rubber is generated at the damaged crack, which promptly repairs the damaged crack structure, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired to a certain extent, thereby achieving a "self-repairing" effect.

[0061] In the exemplary embodiment provided by the present disclosure, the third preset mass ratio of the catalyst and the initiator can be 1:1.02 to 1:1.31. The catalyst and the initiator are added to the polysiloxane in an appropriate mass ratio to prepare the silicone rubber material. When the silicone rubber material is damaged and cracks are generated, the catalyst can play a catalytic role to make the repair agent and the initiator quickly undergo polymerization reaction to repair the damaged cracks of the silicone rubber material, avoiding the waste caused by too high a mass content of the catalyst, and also avoiding the catalyst content being too low, which is insufficient in the catalytic effect on the polymerization reaction of the repair agent and the initiator and cannot react quickly to repair the damaged cracks of the silicone rubber material.

[0062] In the exemplary embodiments provided in the present disclosure, the third preset mass ratio of the catalyst and the initiator can be 1:1.15 to 1:1.26. Within this third preset mass ratio range, without wasting the amount of catalyst, when the silicone rubber material is damaged and cracks are generated, the catalyst has a higher catalytic efficiency and a better catalytic effect for the polymerization reaction of the repair agent and the initiator.

[0063] In an exemplary embodiment provided by the present disclosure, the second preset mass ratio of the initiator to the repair agent is 1:0.89 to 1:2.03.

[0064] At the second preset mass ratio of initiator to repair agent of 1:0.89 to 1:2.03, when the silicone rubber material is damaged and cracks are generated, the first microcapsule and the second microcapsule rupture, and the initiator, repair agent and catalyst are released due to the siphon effect. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction, and new polysiloxane rubber is generated at the damaged crack, which promptly repairs the damaged crack structure, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired to a certain extent, thereby achieving a "self-repairing" effect.

[0065] In the exemplary embodiment provided by the present disclosure, the second preset mass ratio of the initiator and the repairing agent is 1:1.05 to 1:1.89. The initiator and the repairing agent are added to the polysiloxane within the second preset mass ratio range to prepare the silicone rubber material. When the silicone rubber material is damaged and cracks are generated, the repairing agent and the initiator can quickly undergo a polymerization reaction without wasting the initiator or the repairing agent, so as to repair the damaged cracks of the silicone rubber material, thereby avoiding the inappropriate mass ratio of the initiator and the repairing agent and failing to repair the silicone rubber material in time when the silicone rubber material is damaged. In the exemplary embodiment provided by the present disclosure, the second preset mass ratio of the initiator and the repairing agent can be 1:1.24 to 1:1.73.

[0066] In the exemplary embodiment provided in the present disclosure, the shell materials of the first microcapsule and the second microcapsule are both thermosetting resin.

[0067] Thermosetting resin has high heat resistance and will not soften at high temperatures. At the same time, thermosetting resin has a certain degree of brittleness. Therefore, using thermosetting resin as the shell material of the first microcapsule and the second microcapsule can make the first microcapsule and the second microcapsule more likely to rupture when the silicone rubber material is damaged and cracks are generated, and the initiator, repair agent and catalyst are released in time, so that the initiator and the repair agent react chemically under the catalytic action of the catalyst, and new polysiloxane rubber is generated at the damaged crack, thereby repairing the damaged crack structure of the silicone rubber material.

[0068] In an exemplary embodiment provided by the present disclosure, the thermosetting resin includes polyurea-formaldehyde.

[0069] The shell material of the first microcapsule and the second microcapsule are both polyurea-formaldehyde resin, which has good thermal stability, so it can ensure that the shell of the first microcapsule and the second microcapsule will not be damaged under harsh environmental temperatures; and the molecular structure of polyurea-formaldehyde resin contains polar oxygen atoms, so it has good binding force with polysiloxane and can be well dispersed in polysiloxane. On the one hand, when the silicone rubber material is damaged, the damaged part of the silicone rubber material can be repaired in time, and on the other hand, the first microcapsule and the second microcapsule dispersed in the polysiloxane can strengthen and toughen the polysiloxane to form a silicone rubber material with good mechanical properties. In addition, polyurea-formaldehyde resin is cheap and easy to obtain, which can reduce the production cost of silicone rubber materials.

[0070] In an exemplary embodiment provided by the present disclosure, the diameters of the first microcapsule and the second microcapsule are both 170-190 μm.

[0071] If the diameters of the first microcapsule and the second microcapsule are too large, the components inside the microcapsule will agglomerate, affecting the reaction sensitivity of the repair agent, initiator or catalyst released after the microcapsule is damaged; if the diameters of the first microcapsule and the second microcapsule are too small, insufficient repair agent, initiator or catalyst will be released when the microcapsule is damaged, making it difficult to repair the damaged part of the silicone rubber material. Therefore, in the exemplary embodiment provided in the present disclosure, the diameters of the first microcapsule and the second microcapsule are limited to 170 to 190 μm.

[0072] In the exemplary embodiments provided in the present disclosure, the diameters of the first microcapsules and the second microcapsules can both be 174 to 186 μm. Within this diameter range, the first microcapsules and the second microcapsules are added to polysiloxane in the form of particles to produce silicone rubber materials, which can strengthen and toughen the silicone rubber materials produced, thereby improving the tear strength of the silicone rubber materials.

[0073] In the exemplary embodiments provided in the present disclosure, the diameters of the first microcapsule and the second microcapsule can both be 177 to 183 μm, the diameters of the first microcapsule and the second microcapsule are more uniform, and the dispersion in polysiloxane is better. The silicone rubber material can be repaired more promptly when the silicone rubber material is damaged and cracks occur, and the silicone rubber material can be strengthened and toughened.

[0074] In the exemplary embodiments provided in the present disclosure, the shell thickness of the first microcapsule and the second microcapsule are both 100-200 nm.

[0075] The shell material of the first microcapsule and the second microcapsule are both thermosetting resin, which has a certain degree of brittleness. Therefore, when the silicone rubber material is damaged and cracks are generated, the first microcapsule and the second microcapsule are more likely to rupture and release the initiator, the repair agent and the catalyst in time. In addition, in order to ensure that the first microcapsule and the second microcapsule are more likely to rupture when the silicone rubber material is damaged, the shell thickness of the first microcapsule and the second microcapsule should also be controlled. When the shell thickness is too small, the first microcapsule and the second microcapsule in the silicone rubber material are too easy to rupture. Before the silicone rubber material is damaged, the first microcapsule and the second microcapsule will rupture, release the initiator, the repair agent and the catalyst to react, and cause the inactivation of the initiator, the repair agent and the catalyst. When the silicone rubber material is damaged, the first microcapsule and the second microcapsule can no longer release the initiator, the repair agent and the catalyst to repair the silicone rubber material. When the shell thickness is too large, when the silicone rubber material is damaged, the first microcapsule and the second microcapsule are difficult to rupture, and the initiator, the repair agent and the catalyst cannot be released in time to chemically react and repair the damaged crack structure of the silicone rubber material. Therefore, in the exemplary embodiments provided in the present disclosure, the shell thickness of the first microcapsule and the second microcapsule is limited to 100-200 nm, which can ensure that the first microcapsule and the second microcapsule are more likely to rupture when the silicone rubber material is damaged, releasing the initiator, the repair agent and the catalyst. Under the catalytic action of the catalyst, the initiator and the repair agent undergo a chemical reaction to generate new polysiloxane rubber at the damaged crack, thereby timely repairing the damaged crack structure of the silicone rubber material, so that the mechanical properties, physical properties, etc. of the silicone rubber material are repaired to a certain extent, thereby achieving a "self-repairing" effect.

[0076] In the exemplary embodiments provided in the present disclosure, the shell thickness of the first microcapsule and the second microcapsule can both be 116 to 189 nm. The shells of the first microcapsule and the second microcapsule within this thickness range can better wrap the repair agent, initiator and catalyst in the first microcapsule and the second microcapsule, thereby ensuring that the first microcapsule and the second microcapsule will not be damaged during the normal use and production of the silicone rubber material.

[0077] In the exemplary embodiments provided in the present disclosure, the shell thickness of the first microcapsule and the second microcapsule can both be 134 to 176 nm. Within this thickness range, the shells of the first microcapsule and the second microcapsule can accommodate as much repair agent, initiator and catalyst as possible while ensuring the shell strength of the first microcapsule and the second microcapsule, so as to repair the damaged cracks of the silicone rubber material when the silicone rubber material is damaged and cracks are generated.

[0078] An exemplary embodiment of the present disclosure provides a method for preparing a silicone rubber material. The preparation method is used to prepare the silicone rubber material provided by the exemplary embodiment of the present disclosure. The preparation method comprises: adding a first microcapsule and a second microcapsule to polysiloxane according to the mass percentage of the components of the silicone rubber material provided by the exemplary embodiment of the present disclosure, stirring and mixing, to obtain the silicone rubber material.

[0079] According to the mass percentage of the components of the silicone rubber material provided by the exemplary embodiment of the present disclosure, a first microcapsule including an initiator and a second microcapsule including a repair agent are added to polysiloxane, wherein the catalyst is also included in the first microcapsule or the second microcapsule, and the first microcapsule, the second microcapsule and the polysiloxane are stirred and mixed to obtain the silicone rubber material provided by the exemplary embodiment of the present disclosure.

[0080] In an exemplary embodiment provided in the present disclosure, the method for preparing the silicone rubber material further includes: forming the silicone rubber material having a preset shape by extruding or calendering the silicone rubber material.

[0081] After the first microcapsules, the second microcapsules and the polysiloxane are stirred and mixed, the silicone rubber material can be formed into a preset shape by extrusion or calendaring to meet subsequent application requirements.

[0082] In order to more clearly explain the technical solution of the present disclosure, a stress-strain test is performed on the silicone rubber material provided in the exemplary embodiment of the present disclosure, and a stress-strain curve is drawn, as shown in FIG. Figure 1 As shown, Figure 1 The horizontal axis represents strain (%), the vertical axis represents stress (MPa), curve a represents the stress-strain curve of the undamaged silicone rubber material, and curve b represents the stress-strain curve of the silicone rubber material that has undergone "self-repair" after damage. Figure 1 It can be seen that the strength of the silicone rubber material that has undergone "self-repair" after damage is slightly different from that of the undamaged silicone rubber material. This shows that the silicone rubber material provided by the exemplary embodiment of the present disclosure can "self-repair" the damaged crack structure after damage, so that the mechanical properties, physical properties, etc. of the silicone rubber material can be repaired to a certain extent.

[0083] The exemplary embodiment of the present disclosure provides a cable, such as Figure 2 As shown, the protective layer 60 of the cable 10 includes the silicone rubber material provided by the exemplary embodiment of the present disclosure.

[0084] When the silicone rubber material provided by the exemplary embodiment of the present disclosure is damaged and cracks are generated, it can "self-repair" the damaged crack structure in time at the damaged crack, so that the mechanical properties and physical properties of the cable can be repaired to a certain extent, extending the service life, and effectively reducing the proportion of defective products caused by scratches on the cables during the processing of cable manufacturers. Even the scratched cable samples can still be shipped and used normally after repair, reducing economic losses. In addition, when damaged cables are used in adverse environments, electrical sparks are easily generated, posing a safety hazard. Using the silicone rubber material provided by the exemplary embodiment of the present disclosure as the material of the protective layer 60 can enable the cable 10 to "self-repair" at the damaged location when the cracks are initially generated, reducing the safety hazards during the use of the cable 10.

[0085] In the exemplary embodiment provided in the present disclosure, the cable also includes: a shielding layer, a protective layer covering the shielding layer, the shielding layer including an inner cavity formed in a circumferential direction; a first preset number of metal core wires are arranged in the inner cavity, and the outer surface of each metal core wire is wrapped with an insulating layer; the first preset number is greater than or equal to 1.

[0086] like Figure 2 The cable cross-section diagram shown in FIG. 1 shows a cable 10 including a first preset number of metal core wires 20 disposed in the inner cavity of the cable, and each metal core wire 20 is wrapped with an insulating layer on the outer surface; the first preset number is greater than or equal to 1, for example, Figure 2 In the cable shown in , the first preset number of metal core wires 20 is 5. The cable also includes a shielding layer 70. The protective layer 60 covers the shielding layer 70. The shielding layer 70 includes an inner cavity of the cable 10 formed in a circumferential direction.

[0087] In an exemplary embodiment provided by the present disclosure, the cable further includes: a second preset number of filling lines, the filling lines being arranged in the inner cavity; the second preset number is greater than or equal to 1.

[0088] like Figure 2 The cable cross-section diagram shown in FIG. 1 further includes a second preset number of filling lines 30 in the inner cavity of the cable, for example, Figure 2 In the cable shown in , the second preset number of filling wires 30 is three.

[0089] In the exemplary embodiment provided in the present disclosure, the shielding layer includes: a first shielding layer, which is a conductive shielding layer; a second shielding layer, which is a metal wire shielding layer; the second shielding layer covers the first shielding layer, and the first shielding layer is circumferentially enclosed to form an inner cavity.

[0090] like Figure 2In the cross-sectional view of the cable shown in the figure, the shielding layer 70 includes a first shielding layer 50 and a second shielding layer 40, the second shielding layer 40 covers the first shielding layer 50, and the first shielding layer 50 circumferentially encloses the inner cavity of the cable 10. The first shielding layer 50 may be a metal foil or other non-metallic conductive shielding layer, and the second shielding layer 40 may be made of metal wire or metal nylon wire.

[0091] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present disclosure.

[0092] Finally, it should be noted that in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0093] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A silicone rubber material, characterized in that: The silicone rubber material includes the following components expressed in mass percentage: The initiator is included in the first microcapsule, the repairing agent is included in the second microcapsule, and the catalyst is included in the first microcapsule or the second microcapsule.

2. The silicone rubber material according to claim 1, characterized in that: The first preset mass ratio of the catalyst to the repair agent is 1: 1.23～1：1.86。 3. The silicone rubber material according to claim 1 or 2, characterized in that: The second preset mass ratio of the initiator to the repair agent is 1: 0.89～1：2.03。 4. The silicone rubber material according to claim 1, characterized in that: The polysiloxane includes at least one of polydimethylsiloxane, polyethylmethylsiloxane and polyvinylsiloxane.

5. The silicone rubber material according to claim 1, characterized in that: The initiator is polysiloxane having active sites.

6. The silicone rubber material according to claim 5, characterized in that: The polysiloxane having active sites includes at least one of polydimethylsiloxane having active sites, polyethylmethylsiloxane having active sites, and polyvinylsiloxane having active sites.

7. The silicone rubber material according to claim 1, characterized in that: The repair agent is vinyl terminated polysiloxane.

8. The silicone rubber material according to claim 7, characterized in that: The vinyl-terminated polysiloxane includes at least one of vinyl-terminated polydimethylsiloxane, vinyl-terminated polyethylmethylsiloxane, and vinyl-terminated polyvinylsiloxane.

9. The silicone rubber material according to claim 1, characterized in that: The catalyst includes a platinum catalyst.

10. The silicone rubber material according to claim 1, characterized in that: The shell materials of the first microcapsule and the second microcapsule are both thermosetting resin.

11. The silicone rubber material according to claim 10, characterized in that: The thermosetting resin includes polyurea-formaldehyde.

12. The silicone rubber material according to claim 1, characterized in that: The diameters of the first microcapsule and the second microcapsule are both 170-190 μm.

13. The silicone rubber material according to claim 1, characterized in that: The shell thickness of the first microcapsule and the second microcapsule are both 100-200 nm.

14. A method for preparing a silicone rubber material, characterized in that: The preparation method is used to prepare the silicone rubber material according to any one of claims 1 to 13, and the preparation method comprises: According to the mass percentage of the components of the silicone rubber material according to any one of claims 1 to 13, the first microcapsule and the second microcapsule are added to the polysiloxane, stirred and mixed to obtain the silicone rubber material.

15. The method for preparing a silicone rubber material according to claim 14, characterized in that: The preparation method further comprises: forming the silicone rubber material with a preset shape by extruding or calendering the silicone rubber material.

16. A cable, characterized in that: The protective layer of the cable comprises the silicone rubber material as described in any one of claims 1-13.

17. The cable according to claim 16, characterized in that The cable also includes: A shielding layer, wherein the protective layer covers the shielding layer, and the shielding layer includes an inner cavity enclosed in a circumferential direction; A first preset number of metal core wires are arranged in the inner cavity, and the outer surface of each metal core wire is wrapped with an insulating layer; the first preset number is greater than or equal to 1.

18. The cable according to claim 17, characterized in that The cable further includes: a second preset number of filling lines, the filling lines being arranged in the inner cavity; the second preset number is greater than or equal to 1.

19. The cable according to claim 17, characterized in that The shielding layer comprises: A first shielding layer, wherein the first shielding layer is a conductive shielding layer; The second shielding layer is a metal wire shielding layer; the second shielding layer covers the first shielding layer, and the first shielding layer surrounds the inner cavity in a circumferential direction.

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