CN113122831A - Al for operation electrode2O3Ni-P-PTFE doped medical composite coating and preparation method thereof - Google Patents
Al for operation electrode2O3Ni-P-PTFE doped medical composite coating and preparation method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 claims abstract description 43
- 239000000126 substance Substances 0.000 claims abstract description 36
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- 229910018536 Ni—P Inorganic materials 0.000 claims abstract description 23
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1827—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment only one step pretreatment
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Abstract
Al for operation electrode2O3The Ni-P-PTFE doped medical composite coating and the preparation method thereof comprise the following preparation steps: 1) putting the substrate into acetone, and cleaning by ultrasonic waves; 2) firstly, removing oil from a matrix by a chemical method, and then carrying out acid washing and activation by using a hydrochloric acid solution; 3) plating a layer of Ni-P on a base material by chemical plating to be used as a transition layer; 4) Ni-P-Al plating on Ni-P layer by electroless plating2O3-a layer of PTFE. The medical composite coating is mainly applied to the surgical electrode, and can play a role in corrosion resistance, adhesion resistance, wear resistance and abrasion reduction, so that the cutting efficiency and the operation precision of the surgical electrode are improved.
Description
Technical Field
The invention belongs to the field of materials science, and relates to a hard protective coatingLayer, in particular to corrosion-resistant and adhesion-resistant Al for a surgical electrode2O3A Ni-P-PTFE doped medical composite coating and a preparation method thereof.
Background
With the progress of medical treatment and the development of science and technology, medical instruments have greatly promoted the development of medical diagnosis and treatment technologies, but in the conventional surgical operation, a large amount of bleeding occurs when the operation is performed by using a conventional scalpel. For this reason, an electric surgical knife and electrocoagulation have been developed, which heat tissue when a high-frequency current is brought into contact with the body, separate and coagulate the tissue, thereby achieving the purpose of cutting and hemostasis. However, tissue adhesion on the surface of the electrode of the surgical knife can reduce the cutting efficiency and the operation precision of the surgical knife, so the adhesion of the tissue on the surface of the electrode is reduced by plating an anti-adhesion coating on the surface of the electrode of the surgical knife.
The prior chemical plating Ni-P alloy coating has the advantages of good uniform plating property, stability, corrosion resistance, weldability, higher bonding strength, less porosity and the like, so the coating is widely applied to the industries of chemical engineering, national defense, precision instrument manufacturing and the like, and simultaneously, due to the addition of PTFE particles, the Ni-P-PTFE composite coating has the characteristics of excellent wear resistance, friction reduction, non-stick property, seizure resistance and the like, so the coating is widely applied to industrial production. Obtaining Cu, SiC and Al on the basis of the Ni-P-PTFE coating2O3、WS2The performance of the Ni-P-PTFE doped composite coating can be further optimized and designed.
The patent with the application number of CN201510792508.4 relates to a high-phosphorus chemical plating Ni-P-PTFE hydrophobic plating layer and a preparation method thereof, wherein a matrix is pretreated firstly, then the matrix is soaked in a pre-plating solution, and a Ni-P alloy plating layer is pre-plated on the surface of the matrix; then the substrate is soaked in the chemical plating solution, and a Ni-P-PTFE plating layer is chemically plated on the Ni-P alloy plating layer, namely the high-phosphorus chemical plating Ni-P-PTFE hydrophobic plating layer is obtained on the surface of the substrate. The method is suitable for industrial production, the prepared coating has extremely low porosity, excellent hydrophobic property, high phosphorus content, amorphous structure and excellent corrosion resistance, is suitable for being used in the environment of normal and reduced pressure refining heat exchange equipment in the petroleum industry, and can effectively improve the corrosion resistance of refining equipment, thereby solving the problems of over-high corrosion rate of the normal and reduced pressure device refining heat exchanger equipment and the like.
The patent of application number CN201811641855.7 relates to a preparation process of a chemical plating Ni-P-PTFE-SiC composite plating layer, which comprises the preparation steps of carbon steel sample pretreatment including sand blasting, cleaning, oil removal, rust removal, cleaning and hydrochloric acid activation, PTFE emulsion pretreatment, SiC particle oil removal treatment, SiC particle activation treatment, SiC particle dispersion treatment, 800ml of plating solution C is prepared, PTFE dispersion and SiC dispersion are added into the plating solution C, a test piece is put into the mixed plating solution C for plating for 2 hours and then taken out, the plated test piece is taken out after being ultrasonically cleaned in hot water and then air-dried, and the thickness, the bonding force, the hardness, the friction coefficient and the wear rate of the test piece are tested. Compared with a Ni-P coating, a Ni-P-PTFE coating and a Ni-P-SiC coating, the coating has more excellent wear resistance. The plating layer is compact and non-porous, has self-lubricating and wear-resisting functions, and can effectively realize the purpose of wear resistance of the surface of the carbon steel.
However, the medical device, especially the surgical knife and the electrode, which need to resist tissue adhesion, is not applicable. The invention provides corrosion-resistant and adhesion-resistant Al for a surgical electrode2O3A Ni-P-PTFE doped medical composite coating and a preparation method thereof. The medical composite coating for the surgical electrode with excellent wear resistance, friction reduction, corrosion resistance and adhesion resistance can be prepared, and the method has the advantages of simple process, low cost, high deposition speed and capability of obtaining Ni-P-Al2O3The PTFE composite coating has good bonding strength and has important significance for expanding the application of the Ni-P-PTFE coating in the field of medical appliances.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides corrosion-resistant and adhesion-resistant Al for a surgical electrode2O3Ni-P-PTFE doped medical composite coating and preparation method thereof, and Al2O3The Ni-P-PTFE doped medical composite coating aims to solve the technical problems of corrosion resistance, wear resistance and adhesion resistance in the prior art.
According to a first aspect of the present invention, there is provided corrosion-resistant, adhesion-resistant Al for surgical electrodes2O3Ni-P-PTFE doped medical composite coatingA layer, wherein the composite coating comprises a Ni-P transition layer and a Ni-P-Al layer formed on a substrate2O3-a PTFE surface layer, said substrate being electrosurgical and bipolar electrocoagulation.
Preferably, the Ni-P transition layer and the Ni-P-Al2O3The PTFE surface layers are deposited by electroless plating processes, respectively.
According to a second aspect of the present invention, there is provided Al as described above2O3The preparation method of the Ni-P-PTFE doped medical composite coating is characterized by comprising the following steps:
1) putting the substrate into acetone, and cleaning by ultrasonic waves;
2) firstly, removing oil from a matrix by a chemical method, and then carrying out acid washing and activation by using a hydrochloric acid solution;
3) plating a layer of Ni-P on the substrate by chemical plating to be used as a transition layer;
4) Ni-P-Al plating on Ni-P layer by electroless plating2O3-a layer of PTFE.
In a specific case, in the step 1), the surface of the substrate is subjected to ultrasonic cleaning by using acetone; the method comprises the steps of putting a substrate into a container containing acetone solution, immersing, putting the container into an ultrasonic cleaning instrument, setting the power to be 90W and the time to be 30min, and organically removing oil from the substrate to obtain a clean substrate surface.
In a specific case, in the step 2), the solution required for chemical degreasing contains NaOH and Na2CO3、Na3PO4In the solution, the concentration of NaOH is 20g/L, Na2CO3Has a concentration of 30g/L, Na3PO4The concentration of the base is 30g/L, the solution is heated to 70-80 ℃, then the base is added into the oil removing solution, the oil removing time is 10-15min, and therefore the oil stains on the surface of the base are completely removed.
Preferably, the following conditions: in the step 2), the volume fraction of the hydrochloric acid solution in the pickling activation is 40-60%, the deoiled substrate is soaked in the hydrochloric acid solution for pickling activation, the solution temperature is normal temperature, and the soaking time is 3-5min, so that an oxide layer on the surface of the substrate is removed, a completely exposed substrate is obtained, the surface activity of the substrate is greatly enhanced, and the deposition of a subsequent Ni-P layer is facilitated.
Preferably, in the step 3), the pH value of the Ni-P plating solution is 4.8, the plating temperature is 90 ℃, and the deposition time is 20 min.
Preferably, in step 4), Ni-P-Al2O3Al in PTFE baths2O3The concentration is 2.0g/L, the PTFE concentration is 50ml/L, the pH value is 4.8, the plating temperature is 85 ℃, and the deposition time is 15 min. Al added to plating solution2O3It is preferable to use Al having a particle diameter of 1 μm or less, and more preferably, 100-300nm2O3Thereby bringing a nanoscale effect to the coating.
The invention relates to corrosion-resistant and adhesion-resistant Al for a surgical electrode2O3The Ni-P-PTFE doped medical composite coating is prepared by chemical plating Ni-P-Al2O3Al in the plating solution in the process of PTFE composite coating2O3Increase in particle concentration, Al in the coating2O3The content of the PTFE tends to decrease all the time as the content increases, and the content of the PTFE tends to decrease all the time as the content of the PTFE increases, while the content of the P tends to decrease all the time as the content of the P increases, and the contents of the elements are Al2O3The particle concentration reached the maximum value at 2.0 g/L. Meanwhile, in the chemical plating process, Al is contained in the plating solution2O3The particle concentration is increased, and the crystal strength of the Ni (111) crystal face of the composite coating is increased and then reduced; al (Al)2O3The compounding amount and distribution of PTFE particles in the coating and Al2O3The concentration is closely related when Al2O3At a concentration of 2.0g/L, Al2O3The compounding amount of the particles reaches the maximum value and the particles are distributed most uniformly. In chemical plating of Ni-P-Al2O3Al in the plating solution in the process of PTFE composite coating2O3The hardness and the wear resistance of the coating are increased and then reduced along with the increase of the particle concentration, and the hardness and the wear resistance are all in Al2O3The concentration reaches the maximum value when the concentration is 2.0 g/L; the friction coefficient increases in an increasing manner.
Compared with the prior art, the invention has the advantages ofThe progress was significant. The invention is characterized in that Al is doped in the Ni-P-PTFE medical composite coating2O3To Al2O3The Ni-P-PTFE medical composite coating with excellent wear resistance, corrosion resistance and adhesion resistance is prepared by optimizing the concentration and the preparation process parameters, and is applied to the surgical electrode, so that the tissue adhesion resistance of the surgical electrode and the friction resistance, corrosion resistance and friction reduction performance of the electrode are improved, and better cutting efficiency and operation precision are obtained.
Drawings
FIG. 1 shows Al in the electroless plating process of examples 1 to 72O3Concentration pair Ni-P-Al2O3-the effect of PTFE composite coating composition;
FIG. 2 shows different Al contents in electroless plating processes in examples 1 to 72O3Preparation of Ni-P-Al at concentration2O3-X-ray diffraction pattern of PTFE coating: 0g/L, 0.5g/L, 1.0g/L, 1.5g/L, 2.0g/L, 2.5g/L, 3.0 g/L;
FIG. 3 shows Al in the electroless plating process of examples 1 to 72O3Concentration pair Ni-P-Al2O3-effect of PTFE composite coating hardness and coefficient of friction;
FIG. 4 shows Al in the electroless plating process of examples 1 to 72O3Concentration pair Ni-P-Al2O3-effect of wear resistance of PTFE composite coating.
Detailed Description
The present invention will be described in further detail below with reference to specific examples and drawings, but the present invention is not limited thereto. The reagents used in the examples are commercially available and the operating conditions used are those customary in the art, unless otherwise specified.
The preparation, characterization and measurement instrument used in the invention:
Ni-P-Al obtained in each example of the invention2O3-analyzing the crystalline phase structure of the film by using a Bruker X-ray diffraction (XRD) instrument, model D8 ADVANCE;
analysis of N Using QuantaFEG model 450 field emission Environment scanning Electron microscope (FEI, USA) with attached spectrometer (EDS)i-P-Al2O3-composition and microstructure of the PTFE composite coating;
Ni-P-Al is measured by a NANO Indenter G200 type NANO Indenter manufactured by Agilent company of America2O3-hardness of the PTFE composite coating;
the friction coefficient and the abrasion weight loss of the composite coating are measured by adopting an HSR-2M reciprocating friction abrasion instrument of Kwakay science and technology Limited in Kwakawa.
Example 1
Al (aluminum)2O3The preparation method of the Ni-P-PTFE doped medical composite coating comprises the following steps:
(1) putting the substrate into a beaker filled with 100mL of acetone, and cleaning for 10min by adopting ultrasonic waves, wherein the power is set to be 90W;
(2) then, degreasing the substrate by adopting a chemical method, wherein the degreasing temperature is 70-80 ℃, the time is 10-15min, and then pickling and activating the substrate for 3-5min by using hydrochloric acid with the volume fraction of 40-60%;
(3) plating a Ni-P layer on a substrate by chemical plating to serve as a transition layer, wherein the temperature of a plating solution is 90 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process;
(4) then, a Ni-P-PTFE layer is plated on the Ni-P layer, the temperature of the plating solution is 80 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
The substrate used was a test piece of H70 brass, 30mm in length, 25mm in width and 0.3mm in thickness.
In the chemical plating process, the temperature of the Ni-P plating solution is controlled to be 90 ℃, the pH value is 4.8, and the Ni-P layer is obtained after plating for 20 min; controlling the temperature of the Ni-P-PTFE plating solution to be 80 ℃ and the pH value to be 4.8, continuously plating the Ni-P layer for 15min to obtain a Ni-P-PTFE layer, and obtaining the Ni-P-PTFE composite coating after the Ni-P-PTFE layer is plated. The composite coating comprises a substrate, a Ni-P layer and a Ni-P-PTFE composite coating, wherein the substrate, the Ni-P layer and the Ni-P-PTFE composite coating are sequentially arranged from bottom to top.
Example 2
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 0.5g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Example 3
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 1.0g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Example 4
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 1.5g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Example 5
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 2.0g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Example 6
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 2.5g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Example 7
Al (aluminum)2O3A preparation method of the Ni-P-PTFE doped medical composite coating is just to add Al into Ni-P-PTFE plating solution in the chemical plating process in the step (4) of the preparation process2O3Particles of Al2O3The concentration of the plating solution is 3.0g/L, the temperature of the plating solution is 85 ℃, and the pH value of the plating solution is controlled to be 4.8 in the chemical plating process.
Otherwise, the same procedure as in example 1 was repeated.
Examples 1-7, i.e., in the electroless plating process, i.e., Ni-P-Al, respectively2O3Al in PTFE bath2O3The concentration of (b) is respectively 0.0g/L, 0.5g/L, 1.0g/L, 1.5g/L, 2.0g/L, 2.5g/L and 3.0g/L to obtain the corresponding Ni-P-Al2O3The composition of the PTFE composite coating was determined and the results are shown in fig. 1. As can be seen from FIG. 1, Al (representing Al) in the composite coating layer2O3) Al in Ni-P-PTFE composite plating solution with content along with chemical plating2O3The concentration increases in a first increasing and then decreasing trend. Al in plating solution2O3When the concentration is between 0 and 2.0g/L, the content of Al in the obtained composite coating follows the Al in the plating solution2O3Increase in concentration when Al is present in the composite plating solution2O3When the concentration of the particles is 2.0g/L, Al in the obtained composite coating is at the concentration2O3The particle content reaches a maximum. The change of F (representing PTFE) content in the composite coating is also shown in FIG. 1, and it is easy to know that the F content in the coating is dependent on Al in the composite plating solution2O3The concentration increases in a decreasing trend. In addition, as can be seen from fig. 1, the content of P element in the coating layer tends to decrease first and then increase.
Examples 1-7, i.e., in the electroless plating process, i.e., Ni-P-Al, respectively2O3Al in PTFE bath2O3The concentration of (b) is respectively 0.0g/L, 0.5g/L, 1.0g/L, 1.5g/L, 2.0g/L, 2.5g/L and 3.0g/L to obtain the corresponding Ni-P-Al2O3The XRD pattern of the PTFE composite coating is determined, and the result is shown in FIG. 2. As can be seen from FIG. 2, different Al2O3The X-ray diffraction pattern shapes of the obtained composite coatings under the doping amount are basically the same, and the composite coatings obtained under all the doping amounts areA diffraction peak of a steamed bun-shaped Ni (111) crystal face appears near the 2 theta of 45 degrees; removing Al2O3The doping amount is 2.5, and the diffraction peak of PTFE appears at the position of 18.4 degrees at the rest of the doping amount except 3.0 g/L. The obtained Ni-P-Al with various doping amounts2O3-PTFE diffraction peak intensity of PTFE composite coating with Al2O3The particle concentration is increased with little change; the intensity of the Ni (111) diffraction peak is dependent on Al in the bath2O3The particle concentration increases and then decreases, when Al in the composite plating solution2O3At a particle concentration of 2.0g/L, the intensity of the Ni (111) diffraction peak reached the maximum value.
Examples 1-7, i.e., in the electroless plating process, i.e., Ni-P-Al, respectively2O3Al in PTFE bath2O3The concentration of (b) is respectively 0.0g/L, 0.5g/L, 1.0g/L, 1.5g/L, 2.0g/L, 2.5g/L and 3.0g/L to obtain the corresponding Ni-P-Al2O3The hardness and the friction coefficient of the PTFE composite coating were measured and the results are shown in fig. 3. The hardness of the series of composite coatings is changed along with Al in the plating solution2O3The particle concentration increases and tends to increase first and then decrease. When Al is in the composite plating solution2O3At a particle concentration of between 0 and 2.0g/L, the Al content of the resulting composite coating increases and the PTFE content decreases within this concentration range, so that the hardness of the coating decreases with Al in this concentration range, as can be seen from the above analysis2O3The particle concentration increases; when Al is in the plating solution2O3When the particle concentration is further increased, the Al content of the coating begins to decrease and the PTFE content further decreases, in contrast, the decrease in Al content in the coating has a greater effect on the hardness of the composite coating, so that the hardness of the coating in this concentration range follows the Al content of the bath2O3The particle concentration increases and decreases. Meanwhile, as can be seen from FIG. 3, the PTFE particle content in the composite coating depends on Al in the composite plating solution2O3The particle concentration is increased and always reduced, so the friction coefficient of the series of composite coatings is along with Al in the composite plating solution2O3The particle concentration increases and continues to increase.
Examples 1 to 7, i.e., electroless plating process, respectivelyOf medium, i.e. Ni-P-Al2O3Al in PTFE bath2O3The concentration of (b) is respectively 0.0g/L, 0.5g/L, 1.0g/L, 1.5g/L, 2.0g/L, 2.5g/L and 3.0g/L to obtain the corresponding Ni-P-Al2O3The coating abrasion resistance of the PTFE composite coating was measured, and as can be seen from FIG. 4, the abrasion resistance of the composite coating obtained under this concentration gradient was determined in accordance with Al in the plating solution2O3The concentration of the particles increases and then decreases, when Al in the plating solution2O3At a particle concentration of 2.0g/L, the resulting composite coating exhibits the most excellent wear resistance.
From the above examples, it is realized that by controlling Ni-P-Al2O3Al in PTFE bath2O3To obtain Al finally2O3Ni-P-Al with different contents2O3PTFE composite coatings, by comparison of different Al2O3The influence of concentration doping on the microstructure and the mechanical property of the chemical plating Ni-P-PTFE composite coating layer confirms that the optimal doping amount of the Ni-P-PTFE composite coating layer is 2.0 g/L. Ni-P-Al prepared under the doping amount2O3The PTFE composite coating has a compact structure, the coating hardness is high, the friction coefficient is kept at a low level at the moment, and the wear resistance of the PTFE composite coating is remarkably improved compared with that of the Ni-P-PTFE composite coating.
The above description is only a basic description of the present invention, and any equivalent changes made according to the technical solution of the present invention should fall within the protection scope of the present invention.
Claims (6)
1. Al for operation electrode2O3The Ni-P-PTFE doped medical composite coating is characterized by comprising a Ni-P transition layer and Ni-P-Al which are formed on a substrate2O3-a PTFE surface layer, said substrate being electrosurgical and bipolar electrocoagulation.
2. Al according to claim 12O3The Ni-P-PTFE doped medical composite coating is characterized in that the Ni-P transition layer and the Ni-P-Al are2O3Respectively passing through PTFE surface layersAnd depositing by a chemical plating process.
3. Al according to one of claims 1 to 22O3The preparation method of the Ni-P-PTFE doped medical composite coating is characterized by comprising the following steps:
1) putting the substrate into acetone, and cleaning by ultrasonic waves;
2) firstly, removing oil from a matrix by a chemical method, and then carrying out acid washing and activation by using a hydrochloric acid solution;
3) plating a layer of Ni-P on the substrate by chemical plating to be used as a transition layer;
4) Ni-P-Al plating on Ni-P layer by electroless plating2O3-a layer of PTFE.
4. Al according to claim 32O3The preparation method of the Ni-P-PTFE doped medical composite coating is characterized by comprising the following steps: in the step 1), carrying out ultrasonic cleaning on the surface of a substrate by using acetone; the method comprises the steps of putting a substrate into a container containing acetone solution, immersing, putting the container into an ultrasonic cleaning instrument, setting the power to be 90W and the time to be 30min, and organically removing oil from the substrate to obtain a clean substrate surface.
5. Al according to claim 32O3The preparation method of the Ni-P-PTFE doped medical composite coating is characterized by comprising the following steps: in the step 2), the solution required by chemical oil removal contains NaOH and Na2CO3、Na3PO4In the solution, the concentration of NaOH is 20g/L, Na2CO3Has a concentration of 30g/L, Na3PO4The concentration of the base is 30g/L, the solution is heated to 70-80 ℃, then the base is added into the oil removing solution, the oil removing time is 10-15min, and therefore the oil stains on the surface of the base are completely removed.
6. Al according to claim 32O3The preparation method of the Ni-P-PTFE doped medical composite coating is characterized by comprising the following steps: in the step 2), the volume fraction of the hydrochloric acid solution in the acid washing activation is 40-60 percent of the base material after oil removal is soaked in hydrochloric acid solution for acid cleaning and activation, the temperature of the solution is normal temperature, and the soaking time is 3-5min, so that the oxide layer on the surface of the base material is removed, and the base material which is completely exposed is obtained.
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| CN115012012A (en) * | 2022-07-13 | 2022-09-06 | 上海锐畅医疗科技有限公司 | Aluminum oxide doped composite coating for medical metal base material and preparation method thereof |
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