Medical electromagnetic shielding cable and preparation method and application thereof

Abstract

The invention relates to the technical field of cables, and provides a medical electromagnetic shielding cable and a preparation method and application thereof.The medical electromagnetic shielding cable sequentially comprises a cable core, an inner protection layer, an electromagnetic shielding layer and an outer protection layer from inside to outside; the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the conductor is composed of a copper-plated steel wire. Base materials of the inner protective layer and the outer protective layer respectively and independently comprise polyethylene and / or polyvinyl chloride; the electromagnetic shielding layer is prepared from the following raw material components in parts by weight: 100 parts of nitrile rubber, 4 to 8 parts of chlorosulfonated polyethylene, 5 to 10 parts of polycaprolactone, 6 to 10 parts of inorganic nano filler, 3 to 5 parts of vulcanizing agent, 1 to 1.5 parts of accelerant, 1 to 2 parts of active agent, 1 to 2 parts of anti-aging agent and 8 to 14 parts of 4-carboxyphenylboronic acid modified carbon fiber. According to the technical scheme, the problems of low strength and poor electromagnetic shielding performance of the cable in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a medical electromagnetic shielding cable and a preparation method and application thereof. Background Art

[0002] Cables are widely used in many fields such as power transmission, construction, rail transportation, etc. Various advanced medical equipment are often used in medical environments, which places extremely high demands on the accuracy and stability of signal transmission. Cables with electromagnetic shielding function have become key components to ensure the normal operation of medical equipment. It can not only prevent the influence of external electromagnetic interference on medical signals, but also ensure the safety and accuracy of the medical process, and has an indispensable position in the medical field.

[0003] However, the electromagnetic shielding layer of existing cables still has the problems of low strength and poor electromagnetic shielding performance, which makes it difficult for the strength and electromagnetic shielding performance of cable products to meet more demanding application environments. Therefore, it is necessary to obtain a cable material with high strength and excellent electromagnetic shielding performance as the electromagnetic shielding layer of medical cables, so as to effectively block external electromagnetic interference and ensure that the signal transmitted inside the cable is accurate and stable. Especially in a strong magnetic field environment, the electromagnetic shielding cable can ensure the normal operation of medical equipment. Summary of the invention

[0004] The present invention provides a medical electromagnetic shielding cable and a preparation method and application thereof, which solve the problems of low strength and poor electromagnetic shielding performance of the cable in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a medical electromagnetic shielding cable, which comprises a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer from the inside to the outside; the cable core comprises a conductor and an insulating layer from the inside to the outside; the conductor is composed of copper-plated steel wire; the base materials of the inner protective layer and the outer protective layer each independently comprise polyethylene and / or polyvinyl chloride; The raw materials of the electromagnetic shielding layer include the following components in parts by weight: 100 parts of nitrile rubber, 4-8 parts of chlorosulfonated polyethylene, 5-10 parts of polycaprolactone, 6-10 parts of inorganic nanofiller, 3-5 parts of vulcanizing agent, 1-1.5 parts of accelerator, 1-2 parts of activator, 1-2 parts of antioxidant, and 8-14 parts of 4-carboxyphenylboric acid modified carbon fiber.

[0006] As a further technical solution, the preparation method of the 4-carboxyphenylboronic acid modified carbon fiber comprises the following steps: The carbon fiber is subjected to oxidation treatment, mixed with 4-carboxyphenylboric acid and a solvent, and then dried to obtain 4-carboxyphenylboric acid modified carbon fiber.

[0007] As a further technical solution, the mass ratio of the 4-carboxyphenylboric acid to the carbon fiber is 1:8-10; The oxidation treatment is carried out using concentrated nitric acid with a mass concentration of 65% for 6 to 8 hours.

[0008] As a further technical solution, the solvent includes dimethyl sulfoxide; the mass ratio of the solvent to the carbon fiber is 2~3:1.

[0009] As a further technical solution, the raw material of the electromagnetic shielding layer further includes the following components in parts by weight: 4 to 8 parts of titanium carbide modified cerium oxide.

[0010] As a further technical solution, the titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1-3 parts of titanium carbide, 6-8 parts of cerium oxide, 0.3-0.5 parts of carbon source, and 30-50 parts of water.

[0011] As a further technical solution, the method for preparing the titanium carbide modified cerium oxide comprises the following steps: mixing, drying and calcining the raw materials of the titanium carbide modified cerium oxide to obtain the titanium carbide modified cerium oxide.

[0012] In the present invention, titanium carbide modified cerium oxide is added to the electromagnetic shielding layer of the electromagnetic shielding cable to cooperate with 4-carboxyphenylboric acid modified carbon fiber to further improve the strength and electromagnetic shielding performance of the cable.

[0013] As a further technical solution, the mass ratio of the 4-carboxyphenylboric acid modified carbon fiber to the titanium carbide modified cerium oxide is 10:5-7.

[0014] In the present invention, when 4-carboxyphenylboronic acid modified carbon fiber and titanium carbide modified cerium oxide are added in a mass ratio of 10:5-7 in the electromagnetic shielding layer of the electromagnetic shielding cable, the strength and electromagnetic shielding performance of the cable are further improved.

[0015] As a further technical solution, the vulcanizing agent includes sulfur or peroxide; the accelerator includes one or more of accelerator CZ, accelerator D, accelerator DM, and accelerator DZ; the activator includes stearic acid and zinc oxide; the antioxidant is an amine antioxidant; and the inorganic nanofiller includes one or two of nano silicon nitride and nano silicon carbide.

[0016] The present invention also proposes a method for preparing the medical electromagnetic shielding cable, comprising the following steps: S1. Mixing the raw materials of the electromagnetic shielding layer to obtain a mixed material for the electromagnetic shielding layer; S2. After the insulating layer and the inner protective layer are sequentially coated on the surface of the conductor, the mixture of the electromagnetic shielding layer is extruded outside the inner protective layer, and then the outer protective layer is coated outside the electromagnetic shielding layer to obtain an electromagnetic shielding cable.

[0017] The present invention also proposes the use of the medical electromagnetic shielding cable or the electromagnetic shielding cable prepared by the preparation method in medical devices.

[0018] The working principle and beneficial effects of the present invention are: In the present invention, the structure of the medical electromagnetic shielding cable includes a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer from the inside to the outside. The cable core is provided with a conductor and an insulating layer from the inside to the outside. The conductor is made of copper-plated steel wire. The base materials of the inner and outer protective layers are polyethylene and / or polyvinyl chloride. Among them, the electromagnetic shielding layer is prepared by taking nitrile rubber as the matrix, adding chlorosulfonated polyethylene, polycaprolactone, inorganic nanofiller, 4-carboxyphenylboronic acid modified carbon fiber and other components. By adding 4-carboxyphenylboronic acid modified carbon fiber, the strength and electromagnetic shielding performance of the cable are significantly improved. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0020] In the following embodiments and comparative examples, the diameter of the carbon fiber is 8 μm and the length is 0.5 mm; the model of the nitrile rubber is 2665; the model of the chlorosulfonated polyethylene is CSM3304; the molecular weight of the polycaprolactone is 30,000; the particle size of the nano-silicon nitride is 20 nm; the particle size of the nano-silicon carbide is 30 nm; the particle size of the titanium carbide is 20 nm; and the particle size of the cerium oxide is 5 μm.

[0021] Example 1 The medical electromagnetic shielding cable comprises, from the inside to the outside, a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer; the cable core comprises, from the inside to the outside, a conductor and an insulating layer; the conductor is composed of copper-plated steel wire; the base materials of the inner protective layer and the outer protective layer each independently comprise polyethylene and / or polyvinyl chloride; The raw materials of the electromagnetic shielding layer include the following components in parts by weight: 100 parts of nitrile rubber, 4 parts of chlorosulfonated polyethylene, 5 parts of polycaprolactone, 10 parts of nano silicon carbide, 3 parts of sulfur, 1 part of accelerator CZ, 0.5 parts of stearic acid, 0.5 parts of zinc oxide, 1 part of antioxidant 4010, and 8 parts of 4-carboxyphenylboric acid modified carbon fiber; The preparation method of 4-carboxyphenylboronic acid modified carbon fiber comprises the following steps: After the carbon fiber is subjected to oxidation treatment, it is mixed with 4-carboxyphenylboric acid and dimethyl sulfoxide, and then dried to obtain 4-carboxyphenylboric acid modified carbon fiber; the mass ratio of 4-carboxyphenylboric acid to carbon fiber is 1:8, and the mass ratio of dimethyl sulfoxide to carbon fiber is 2:1; A method for preparing a medical electromagnetic shielding cable comprises the following steps: S1. Mixing raw materials for the electromagnetic shielding layer to obtain a mixture for the electromagnetic shielding layer; S2. After the insulating layer and the inner protective layer are sequentially coated on the surface of the conductor, the mixture of the electromagnetic shielding layer is extruded outside the inner protective layer, and then the outer protective layer is coated outside the electromagnetic shielding layer to obtain an electromagnetic shielding cable.

[0022] Example 2 The medical electromagnetic shielding cable comprises, from the inside to the outside, a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer; the cable core comprises, from the inside to the outside, a conductor and an insulating layer; the conductor is composed of copper-plated steel wire; the base materials of the inner protective layer and the outer protective layer each independently comprise polyethylene and / or polyvinyl chloride; The raw materials of the electromagnetic shielding layer include the following components in parts by weight: 100 parts of nitrile rubber, 8 parts of chlorosulfonated polyethylene, 10 parts of polycaprolactone, 6 parts of nano silicon nitride, 5 parts of sulfur, 1.5 parts of accelerator CZ, 1.5 parts of stearic acid, 0.5 parts of zinc oxide, 2 parts of antioxidant 4010, and 14 parts of 4-carboxyphenylboric acid modified carbon fiber; The preparation method of 4-carboxyphenylboronic acid modified carbon fiber comprises the following steps: After the carbon fiber is subjected to oxidation treatment, it is mixed with 4-carboxyphenylboric acid and dimethyl sulfoxide, and then dried to obtain 4-carboxyphenylboric acid modified carbon fiber; the mass ratio of 4-carboxyphenylboric acid to carbon fiber is 1:10, and the mass ratio of dimethyl sulfoxide to carbon fiber is 3:1; A method for preparing a medical electromagnetic shielding cable comprises the following steps: S1. Mixing raw materials for the electromagnetic shielding layer to obtain a mixture for the electromagnetic shielding layer; S2. After the insulating layer and the inner protective layer are sequentially coated on the surface of the conductor, the mixture of the electromagnetic shielding layer is extruded outside the inner protective layer, and then the outer protective layer is coated outside the electromagnetic shielding layer to obtain an electromagnetic shielding cable.

[0023] Example 3 The medical electromagnetic shielding cable comprises, from the inside to the outside, a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer; the cable core comprises, from the inside to the outside, a conductor and an insulating layer; the conductor is composed of copper-plated steel wire; the base materials of the inner protective layer and the outer protective layer each independently comprise polyethylene and / or polyvinyl chloride; The raw materials of the electromagnetic shielding layer include the following components in parts by weight: 100 parts of nitrile rubber, 6 parts of chlorosulfonated polyethylene, 7 parts of polycaprolactone, 3 parts of nano silicon nitride, 6 parts of nano silicon carbide, 4 parts of sulfur, 0.5 parts of accelerator CZ, 1 part of accelerator DM, 0.5 parts of stearic acid, 1 part of zinc oxide, 1.5 parts of antioxidant 4010, and 10 parts of 4-carboxyphenylboric acid modified carbon fiber; The preparation method of 4-carboxyphenylboronic acid modified carbon fiber comprises the following steps: After the carbon fiber is subjected to oxidation treatment, it is mixed with 4-carboxyphenylboric acid and dimethyl sulfoxide, and then dried to obtain 4-carboxyphenylboric acid modified carbon fiber; the mass ratio of 4-carboxyphenylboric acid to carbon fiber is 1:8, and the mass ratio of dimethyl sulfoxide to carbon fiber is 3:1; A method for preparing a medical electromagnetic shielding cable comprises the following steps: S1. Mixing raw materials for the electromagnetic shielding layer to obtain a mixture for the electromagnetic shielding layer; S2. After the insulating layer and the inner protective layer are sequentially coated on the surface of the conductor, the mixture of the electromagnetic shielding layer is extruded outside the inner protective layer, and then the outer protective layer is coated outside the electromagnetic shielding layer to obtain an electromagnetic shielding cable.

[0024] Example 4 The only difference between this embodiment and embodiment 3 is that the raw material of the electromagnetic shielding layer further includes the following components in parts by weight: 0.57 parts of titanium carbide and 3.43 parts of cerium oxide.

[0025] Example 5 The only difference between this embodiment and embodiment 3 is that the raw materials of the electromagnetic shielding layer further include the following components in parts by weight: 4 parts of titanium carbide modified cerium oxide; The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1 part of titanium carbide, 6 parts of cerium oxide, 0.3 parts of starch, and 30 parts of water; The preparation method of titanium carbide modified cerium oxide comprises the following steps: mixing raw materials of titanium carbide modified cerium oxide, drying and calcining to obtain titanium carbide modified cerium oxide.

[0026] Example 6 The difference between this embodiment and embodiment 3 is that the raw material of the electromagnetic shielding layer further includes the following components in parts by weight: 8 parts of titanium carbide modified cerium oxide; The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1 part of titanium carbide, 6 parts of cerium oxide, 0.3 parts of starch, and 30 parts of water; The preparation method of titanium carbide modified cerium oxide comprises the following steps: mixing raw materials of titanium carbide modified cerium oxide, drying and calcining to obtain titanium carbide modified cerium oxide.

[0027] Example 7 The difference between this embodiment and embodiment 3 is that the raw material of the electromagnetic shielding layer further includes the following components in parts by weight: 5 parts of titanium carbide modified cerium oxide; The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1 part of titanium carbide, 6 parts of cerium oxide, 0.3 parts of starch, and 30 parts of water; The preparation method of titanium carbide modified cerium oxide comprises the following steps: mixing raw materials of titanium carbide modified cerium oxide, drying and calcining to obtain titanium carbide modified cerium oxide.

[0028] Example 8 The only difference between this embodiment and embodiment 3 is that the raw materials of the electromagnetic shielding layer further include the following components in parts by weight: 7 parts of titanium carbide modified cerium oxide; The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1 part of titanium carbide, 6 parts of cerium oxide, 0.3 parts of starch, and 30 parts of water; The preparation method of titanium carbide modified cerium oxide comprises the following steps: mixing raw materials of titanium carbide modified cerium oxide, drying and calcining to obtain titanium carbide modified cerium oxide.

[0029] Example 9 The only difference between this embodiment and embodiment 3 is that the raw materials of the electromagnetic shielding layer further include the following components in parts by weight: 7 parts of titanium carbide modified cerium oxide; The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 3 parts of titanium carbide, 8 parts of cerium oxide, 0.5 parts of starch, and 50 parts of water; The preparation method of titanium carbide modified cerium oxide comprises the following steps: mixing raw materials of titanium carbide modified cerium oxide, drying and calcining to obtain titanium carbide modified cerium oxide.

[0030] Comparative Example 1 The difference between this comparative example and Example 3 is that the 4-carboxyphenylboronic acid modified carbon fiber is replaced by carbon fiber.

[0031] The electromagnetic shielding layers of the electromagnetic shielding cables prepared in Examples 1 to 9 and Comparative Example 1 were tested for strength and electromagnetic shielding performance: Strength: Tested in accordance with GB / T 2951.11-2008 "General test methods for insulation and sheath materials of electric and optical cables Part 11 General test methods - Thickness and dimensions measurement - Mechanical properties test"; Electromagnetic shielding: Use a vector network analyzer to test the electromagnetic shielding effectiveness in the frequency range of 2GHz~8GHz; The results are shown in Table 1 below.

[0032] Table 1 Performance test results

[0033] Compared with Comparative Example 1, the electromagnetic shielding layers of the electromagnetic shielding cables prepared in Examples 1 to 9 have higher tensile strength and electromagnetic shielding efficiency, indicating that the electromagnetic shielding layer of the medical electromagnetic shielding cable is based on nitrile rubber, and the addition of 4-carboxyphenylboronic acid modified carbon fiber and other components significantly improves the strength and electromagnetic shielding performance of the cable.

[0034] Compared with Examples 3 to 4, the electromagnetic shielding layers of the electromagnetic shielding cables prepared in Examples 5 to 9 have higher tensile strength and electromagnetic shielding effectiveness, indicating that titanium carbide-modified cerium oxide is added to the electromagnetic shielding layer of the electromagnetic shielding cable, which works synergistically with 4-carboxyphenylboric acid-modified carbon fiber to further improve the strength and electromagnetic shielding performance of the cable.

[0035] Compared with Examples 5 to 6, the electromagnetic shielding layers of the electromagnetic shielding cables prepared in Examples 7 to 9 have higher tensile strength and electromagnetic shielding effectiveness, indicating that when 4-carboxyphenylboric acid modified carbon fiber and titanium carbide modified cerium oxide in a mass ratio of 10:5 to 7 are added to the electromagnetic shielding layer of the electromagnetic shielding cable, the strength and electromagnetic shielding performance of the cable are further improved.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical electromagnetic shielding cable, characterized in that: The cable core comprises a cable core, an inner protective layer, an electromagnetic shielding layer, and an outer protective layer in order from the inside to the outside; the cable core comprises a conductor and an insulating layer in order from the inside to the outside; the conductor is composed of copper-plated steel wire; the base materials of the inner protective layer and the outer protective layer each independently comprise polyethylene and / or polyvinyl chloride; The raw materials of the electromagnetic shielding layer include the following components in parts by weight: 100 parts of nitrile rubber, 4-8 parts of chlorosulfonated polyethylene, 5-10 parts of polycaprolactone, 6-10 parts of inorganic nanofiller, 3-5 parts of vulcanizing agent, 1-1.5 parts of accelerator, 1-2 parts of activator, 1-2 parts of antioxidant, and 8-14 parts of 4-carboxyphenylboric acid modified carbon fiber.

2. The electromagnetic shielding cable for medical use according to claim 1, characterized in that: The preparation method of the 4-carboxyphenylboronic acid modified carbon fiber comprises the following steps: The carbon fiber is subjected to oxidation treatment, mixed with 4-carboxyphenylboric acid and a solvent, and then dried to obtain 4-carboxyphenylboric acid modified carbon fiber.

3. The electromagnetic shielding cable for medical use according to claim 2, characterized in that: The mass ratio of the 4-carboxyphenylboric acid to the carbon fiber is 1:8-10; The oxidation treatment is carried out using concentrated nitric acid with a mass concentration of 65% for 6 to 8 hours.

4. The electromagnetic shielding cable for medical use according to claim 2, characterized in that: The raw materials of the electromagnetic shielding layer also include the following components in parts by weight: 4 to 8 parts of titanium carbide modified cerium oxide.

5. The electromagnetic shielding cable for medical use according to claim 4, characterized in that: The titanium carbide modified cerium oxide comprises the following raw materials in parts by weight: 1-3 parts of titanium carbide, 6-8 parts of cerium oxide, 0.3-0.5 parts of carbon source, and 30-50 parts of water.

6. The electromagnetic shielding cable for medical use according to claim 5, characterized in that: The preparation method of the titanium carbide modified cerium oxide comprises the following steps: mixing the raw materials of the titanium carbide modified cerium oxide, drying and calcining to obtain the titanium carbide modified cerium oxide.

7. The electromagnetic shielding cable for medical use according to claim 5, characterized in that: The mass ratio of the 4-carboxyphenylboric acid modified carbon fiber to the titanium carbide modified cerium oxide is 10:5-7.

8. The electromagnetic shielding cable for medical use according to claim 1, characterized in that: The vulcanizing agent includes sulfur or peroxide; the accelerator includes one or more of accelerator CZ, accelerator D, accelerator DM, and accelerator DZ; the activator includes stearic acid and zinc oxide; the antioxidant is an amine antioxidant; and the inorganic nanofiller includes one or two of nano silicon nitride and nano silicon carbide.

9. A method for preparing a medical electromagnetic shielding cable according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Mixing the raw materials of the electromagnetic shielding layer to obtain a mixed material for the electromagnetic shielding layer; S2. After the insulating layer and the inner protective layer are sequentially coated on the surface of the conductor, the mixture of the electromagnetic shielding layer is extruded outside the inner protective layer, and then the outer protective layer is coated outside the electromagnetic shielding layer to obtain an electromagnetic shielding cable.

10. Use of the electromagnetic shielding cable for medical use according to any one of claims 1 to 8 or the electromagnetic shielding cable prepared by the preparation method according to claim 9 in medical devices.

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