Electrosurgical anti-sticking coating and preparation method thereof

Abstract

The invention discloses an electrosurgical anti-sticking coating and a preparation method thereof.The anti-sticking coating sequentially comprises a nanometer bonding layer, a stress thermal resistance layer and a low-surface-energy layer from bottom to top, the nanometer bonding layer comprises a base body and a bottoming metal layer, the stress thermal resistance layer is of a ceramic layer-stress metal layer-ceramic layer structure, and the low-surface-energy layer is arranged between the base body and the stress thermal resistance layer. The low surface energy layer is a diamond-like carbon film or a fluorine-containing diamond-like carbon film. The anti-sticking coating can greatly reduce the tissue adhesion effect in the electrosurgical operation, the coating does not fall off, the arc resistance is high, the biocompatibility is good, the surface layer heat dissipation is good, the middle heat resistance is large, and tissue burn caused by heating of the tool bit body can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of high-frequency electrosurgery materials, and in particular relates to an electrosurgery anti-adhesive coating and a preparation method thereof. Background Art

[0002] High-frequency surgical equipment has become an indispensable surgical tool in clinical surgery due to its advantages such as high cutting sharpness, good coagulation effect and greatly reduced operation time, and its scope of clinical application is becoming increasingly wide.

[0003] High-frequency surgical equipment uses the high-frequency, high-voltage alternating current generated by the surgical generator to generate a thermal effect through the contact surface between the tip of the blade and the tissue, causing the tissue to vaporize and coagulate, thereby achieving the purpose of cutting, ablation, and coagulation. During the cutting process, the temperature around the tissue can reach 250-280°C, and during coagulation, the temperature around the tissue can reach 300-350°C. Therefore, when using high-frequency surgical equipment, side effects such as high tissue thermal damage, large amounts of smoke, and easy adhesion of surgical electrodes will occur.

[0004] In order to solve these problems, achieving low temperature, low smoke, low adhesion and other effects during surgery through composite inorganic coating technology has become an important direction in the research and development of high-frequency surgical equipment. Summary of the invention

[0005] Technical problems to be solved: In response to the above technical problems, the present invention provides an electrosurgical anti-adhesive coating and a preparation method thereof, which can effectively solve the shortcomings of the above high-frequency surgical equipment when in use, such as high tissue thermal damage, large smoke, and easy adhesion of surgical electrodes.

[0006] Technical solution: In the first aspect, the present invention provides an electrosurgical anti-adhesive coating, which includes, from bottom to top, a nano-bonding layer, a stress thermal resistance layer and a low surface energy layer, wherein the nano-bonding layer includes a substrate and a base metal layer, the stress thermal resistance layer is a structure of a ceramic layer-stress metal layer-ceramic layer, and the low surface energy layer is a diamond-like film or a fluorine-containing diamond-like film.

[0007] Preferably, the thickness of the primer metal layer is 50-200 nm, the thickness of the ceramic layer is 1-3 μm, the thickness of the stress metal layer is 50-200 nm, and the thickness of the low surface energy layer is 1-2 μm.

[0008] Preferably, the substrate is stainless steel, and the metal of the primer metal layer is Cr or Ti.

[0009] Preferably, the material of the ceramic layer is SiO 2 、Si 3 N 4 Or SiCN, the metal of the stress metal layer is Fe or Ti.

[0010] In a second aspect, the present invention provides a method for preparing the electrosurgical anti-adhesive coating according to the first aspect, comprising the following steps: S1, after degreasing, alkali washing, acid washing and water washing, the substrate is placed in an electrolytic cell, and the treated substrate is connected to the anode; S2. Add NaCl and NaClO to the electrolytic cell. 3 , cellulose, an oxidant and a surfactant, the cathode is austenitic stainless steel, electrolytic corrosion is carried out at 40℃~60℃, the current density is 0.1A~0.3A / dm², and the matrix after electrolysis is obtained, and after washing and drying, the matrix after drying is obtained; S3, using magnetron sputtering technology to perform transition metal primer on the dried substrate, and then starting to deposit a first heat-insulating ceramic layer in a magnetron sputtering furnace, and after depositing a stress metal layer on the first ceramic layer, continuing to deposit a second ceramic layer to complete the preparation of the stress thermal resistance layer; S4. Diamond-like coating is carried out in a special vacuum furnace for diamond-like coating. After being taken out, stress is removed in a furnace at 150°C to 180°C for 4 to 8 hours. After being placed at room temperature for 24 to 72 hours, an electrosurgical anti-adhesive coating is obtained.

[0011] Preferably, in step S2, NaCl, NaClO 3 , cellulose, oxidant and surfactant account for 0-15%, 3%-6%, 1%-2%, 3%-7% and 2%-3% of the total mass of the solution, respectively.

[0012] Preferably, fluorine may be infiltrated during the diamond-like carbon coating in step S4, with a concentration of 5 wt.%-20 wt.%.

[0013] Beneficial effects: The anti-stick coating of the present invention can greatly reduce the tissue adhesion effect during electrosurgery, and the coating does not collapse, has strong arc resistance, good biocompatibility, good surface heat dissipation, and large intermediate thermal resistance, which can reduce tissue burns caused by heating of the blade body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an electrosurgical anti-adhesive coating of the present invention; The serial numbers in the figure are: 1. Nano-bonding layer, 1-1. substrate, 1-2. base metal layer, 2. stress thermal resistance layer, 2-1. first ceramic layer, 2-2. stress metal layer, 2-3. second ceramic layer, 3. low surface energy layer. DETAILED DESCRIPTION

[0015] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: Example 1

[0016] like Figure 1As shown, an electrosurgical anti-adhesive coating comprises, from bottom to top, a nano-bonding layer 1, a stress thermal resistance layer 2 and a low surface energy layer 3, wherein the nano-bonding layer 1 comprises, from bottom to top, a substrate 1-1 and a base metal layer 1-2, the stress thermal resistance layer 2 is a structure of a ceramic layer-stress metal layer-ceramic layer, and the low surface energy layer 3 is a diamond-like film or a fluorine-containing diamond-like film. Example 2

[0017] A method for preparing an electrosurgical anti-adhesive coating comprises the following steps: S1, after degreasing, alkali washing, acid washing and water washing, the substrate 1-1 is placed in an electrolytic cell, and the treated substrate 1-1 is connected to the anode; S2. Add NaCl (11 wt.%) and NaClO to the water in the electrolytic cell. 3 (4 wt.%), cellulose (1 wt.%), oxidant (5.0 wt.%) and surfactant (2.5 wt.%), the anode is the substrate, the cathode is austenitic stainless steel, electrolytic corrosion is carried out at 50 °C, after completion, it is cleaned and dried to obtain the dried substrate 1-1; S3, using magnetron sputtering technology to perform transition metal primer on the dried substrate 1-1, the thickness of the primer metal layer is 200 nm, and then starting to deposit the first heat-insulating ceramic layer 2-1 (2 μm) in the magnetron sputtering furnace, after depositing the stress metal layer 2-2 (200 nm) on the first ceramic layer 2-1, continue to deposit the second ceramic layer 2-3 (2 μm), and complete the preparation of the stress thermal resistance layer 2; S4. Diamond-like coating is carried out in a special vacuum furnace for diamond-like coating. After being taken out, stress relief is carried out in a furnace at 165°C for 8 hours. After being placed at room temperature for 72 hours, an electrosurgical anti-adhesive coating is obtained. Example 3

[0018] The preparation method of this embodiment is the same as that of embodiment 2, except that in step S4, 10% fluorine is infiltrated during the diamond-like carbon coating to further improve the anti-sticking effect. Example 5

[0019] The electric knife samples with the coating of the present invention and the electric knife samples with stainless steel surfaces were tested. The test objects were lean pork meat, which was cut with powers of 30W, 35W, 40W, 45W and 50W, respectively. The test results showed that the adhesion rates of the anti-stick coating decreased by 90%, 84%, 82%, 80% and 77% respectively under the above powers, so the anti-stick coating has obvious anti-stick effect.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrosurgical anti-adhesive coating, characterized in that: The invention comprises, from bottom to top, a nano-combination layer (1), a stress thermal resistance layer (2) and a low surface energy layer (3); the nano-combination layer (1) comprises a substrate (1-1) and a base metal layer (1-2); the stress thermal resistance layer (2) is a ceramic layer-stress metal layer-ceramic layer structure; and the low surface energy layer (3) is a diamond-like film or a fluorine-containing diamond-like film.

2. An electrosurgical anti-adhesive coating according to claim 1, characterized in that: The thickness of the bottom metal layer (1-2) is 50-200 nm, the thickness of the ceramic layer is 1-3 μm, the thickness of the stress metal layer (2-2) is 50-200 nm, and the thickness of the low surface energy layer (3) is 1-2 μm.

3. The electrosurgical anti-adhesive coating according to claim 1, characterized in that: The substrate (1-1) is stainless steel, and the metal of the base metal layer (1-2) is Cr or Ti.

4. The electrosurgical anti-adhesive coating according to claim 1, characterized in that: The material of the ceramic layer is SiO2, Si3N4 or SiCN, and the metal of the stress metal layer (2-2) is Fe or Ti.

5. A method for preparing an electrosurgical anti-adhesive coating according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, after degreasing, alkali washing, acid washing and water washing, the substrate (1-1) is placed in an electrolytic cell, and the treated substrate (1-1) is connected to the anode; S2, adding NaCl, NaClO3, cellulose, an oxidant and a surfactant into an electrolytic cell, with the cathode being austenitic stainless steel, and performing electrolytic corrosion at 40°C to 60°C with a current density of 0.1A to 0.3A / dm² to obtain an electrolyzed substrate (1-1), and after washing and drying, obtaining a dried substrate (1-1); S3, using magnetron sputtering technology to perform transition metal primer on the dried substrate (1-1), and then starting to deposit a first heat-insulating ceramic layer (2-1) in a magnetron sputtering furnace, and after depositing a stress metal layer (2-2) on the first ceramic layer (2-1), continuing to deposit a second ceramic layer (2-3) to complete the preparation of the stress thermal resistance layer (2); S4. Diamond-like coating is carried out in a special vacuum furnace for diamond-like coating. After being taken out, stress is removed in a furnace at 150°C to 180°C for 4 to 8 hours. After being placed at room temperature for 24 to 72 hours, an electrosurgical anti-adhesive coating is obtained.

6. The preparation method according to claim 5, characterized in that: In step S2, the percentages of NaCl, NaClO3, cellulose, oxidant and surfactant in the total mass of the solution are 0-15%, 3%-6%, 1%-2%, 3%-7% and 2%-3%, respectively.

7. The preparation method according to claim 5, characterized in that: In step S4, fluorine may be infiltrated during the diamond-like carbon coating process, and the concentration of fluorine is 5 wt.%-20 wt.%.

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