CN115591023A - Drag reduction structure with self-lubricating layer, artificial joint and preparation method - Google Patents
Drag reduction structure with self-lubricating layer, artificial joint and preparation method Download PDFInfo
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/28—Materials for coating prostheses
- A61L27/30—Inorganic materials
- A61L27/306—Other specific inorganic materials not covered by A61L27/303 - A61L27/32
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/28—Materials for coating prostheses
- A61L27/34—Macromolecular materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/10—Materials for lubricating medical devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2420/00—Materials or methods for coatings medical devices
- A61L2420/06—Coatings containing a mixture of two or more compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2420/00—Materials or methods for coatings medical devices
- A61L2420/08—Coatings comprising two or more layers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/24—Materials or treatment for tissue regeneration for joint reconstruction
Abstract
The invention provides a drag reduction structure with a self-lubricating layer, an artificial joint and a preparation method, which are used for solving the technical problems that the existing high polymer drag reduction material is difficult to use for a long time in the field of aircraft, the drag reduction performance is easy to damage, and the existing artificial joint has large rigid contact friction force, abrasion and infection. The drag reduction structure comprises a substrate, wherein a micro-nano rough structure and a groove structure are arranged on the upper surface of the substrate; an integrated polymer material layer is arranged on the upper surface of the substrate and the surface of the groove structure and extends into the micro-nano rough structure; the polymer material layer comprises a first lubricating liquid and a polymer material, and a second lubricating liquid seeps out of the molecular gaps of the polymer material layer and forms a self-lubricating layer on the surface of the polymer material layer. The invention provides an artificial joint, which comprises a first artificial prosthesis and a second artificial prosthesis which are matched; the matching surface of the first artificial prosthesis and/or the second artificial prosthesis is provided with a high polymer material layer, and a self-lubricating layer is formed on the surface of the high polymer material layer.
Description
Technical Field
The invention relates to a drag reduction structure, in particular to a drag reduction structure with a self-lubricating layer, an artificial joint and a preparation method.
Background
The high polymer anti-drag material, also called high polymer anti-friction material, has the characteristics of small friction coefficient and wear resistance, has wide application, and has a plurality of applications in the fields of aircraft, medical treatment and the like.
In the field of aircrafts, the method has great significance in improving the operating efficiency and energy utilization rate of aircrafts and realizing pipeline transportation or navigation resistance reduction. The existing drag reduction technology of aircraft mainly comprises high polymer drag reduction, coating drag reduction, cavitation drag reduction and the like. Polymer drag reduction is achieved by adding polymers, such as drag reducers or surface modifiers, to the fluid to reduce flow resistance; from the bionic aspect, the resistance reduction of the coating is mainly realized by preparing a dolphin skin-imitated flexible film on the surface of a ship body or modifying the surface of the ship body into a hydrophobic resistance-reduction coating by low surface energy; cavitation drag reduction mainly utilizes low friction resistance between gas and liquid to change the flow structure of a boundary layer, but the generation of micro bubbles needs to additionally provide energy, equipment and the like, so that the cavitation drag reduction is difficult to be applied in practice; the methods have the phenomena that additional chemical reagents are added, the long-time use is difficult, the resistance reducing performance is easy to damage and the like, and the practical application is difficult.
In the medical field, artificial joint replacement surgery is becoming more and more common as aging progresses. The artificial joint is generally composed of three parts, including an artificial prosthesis fixed on bones on two sides of a human body and a backing plate positioned between the artificial prostheses on the two sides, wherein the artificial prosthesis is made of stainless steel, cobalt-chromium-molybdenum alloy, titanium alloy, ceramic and other materials, the service life of the artificial joint is long, and the service life of the backing plate determines the service life of the artificial joint because the backing plate is worn. Polyethylene material is mostly adopted in the prior cushion plate, the service life of the prior cushion plate is about 15 years, and with the development of the technology, ultrahigh molecular weight polyethylene (UHMWPE) is adopted in the prior cushion plate. At present, the service life of the artificial joint can reach 50 years to 500 years theoretically, but in actual use, the artificial joint still has more cases of revision due to the influence of various factors, wherein abrasion and infection are one of the main factors. In addition, the artificial joint replacement has the problem of large rigid contact friction force, because the lubricating liquid of the contact surface between the artificial prosthesis of the joint and the backing plate is insufficient, sound is generated due to friction during the joint movement, some sounds can even be heard by people beside the patient, the sounds are continuously emitted, and the psychologically vulnerable patient may further present psychological obstacles or even greater problems.
Disclosure of Invention
The invention aims to solve the technical problems that the existing high polymer anti-drag material is difficult to use for a long time in the field of aircraft, the anti-drag performance is easy to damage, and the existing artificial joint in the field of medical treatment has large rigid contact friction force, abrasion and infection, and provides an anti-drag structure with a self-lubricating layer, an artificial joint and a preparation method.
In order to achieve the above object, the technical solution of the present invention is as follows:
a drag reducing structure with a self-lubricating layer is characterized by comprising a substrate;
the substrate is a metal substrate, a micro-nano rough structure is arranged on the upper surface of the substrate, and a groove structure is etched on the upper surface of the substrate provided with the micro-nano rough structure;
the upper surface of the substrate and the surface of the groove structure are provided with an integrated polymer material layer, and the polymer material layer on the upper surface of the substrate extends into the micro-nano coarse structure;
the polymer material layer comprises a first lubricating liquid and a polymer material, a second lubricating liquid is stored in the molecular gap of the polymer material layer, and the second lubricating liquid seeps out of the surface of the polymer material layer to form a self-lubricating layer; furthermore, the polymer material layer is polydimethylsiloxane gel;
the first lubricating liquid is first silicone oil with the viscosity ranging from 100cps to 500 cps;
the polydimethylsiloxane gel is formed by mixing and curing first silicone oil and polydimethylsiloxane, and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1;
the second lubricating liquid is second silicone oil with the viscosity ranging from 5 cps to 100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
Furthermore, the groove structure is a plurality of grooves with the width and the depth of sub-millimeter level, and a surface structure imitating rice leaves is formed; or the grooves which are distributed in a rhombus shape with the width and the depth of sub-millimeter level and are communicated with each other form a shark skin-imitated surface structure; the substrate is a metal substrate.
The invention also provides a preparation method of the drag reduction structure with the self-lubricating layer, which is used for preparing the drag reduction structure with the self-lubricating layer and is characterized by comprising the following steps:
1, preparing a micro-nano rough structure and a groove structure on the upper surface of a substrate;
mixing the first lubricating liquid with a high polymer material, and uniformly stirring to obtain a liquid high polymer material;
coating a liquid polymer material on the surface of the substrate with the prepared micro-nano rough structure and the prepared groove structure, so that the liquid polymer material is uniformly adhered to the surface of the substrate, the inside of the micro-nano rough structure and the surface of the groove structure;
4, curing the liquid polymer material to form a polymer material layer on the surface of the substrate;
5, soaking the substrate with the polymer material layer formed on the surface in second lubricating liquid to enable the second lubricating liquid to be adsorbed in the molecular gaps of the polymer material layer;
and 6, wiping the high-molecular material layer after taking out, and enabling the second lubricating liquid to seep out from the molecular gaps of the high-molecular material layer to form a self-lubricating layer on the surface of the high-molecular material layer so as to obtain the drag reduction structure with the self-lubricating layer.
Further, in the step 1, the preparation of the micro-nano rough structure and the groove structure on the substrate surface specifically comprises the following steps:
1.1, ablating the surface of a substrate made of a metal material by using laser with energy of 100-3000 mu J to form a micro-nano porous structure;
1.2, etching a plurality of side-by-side grooves with the width and the depth of sub-millimeter level on the surface of a metal substrate by using laser with the energy of 8000-15000 mu J to form a groove structure imitating rice leaves;
or, etching rhombic grooves which are distributed in a sub-millimeter level in width and depth and are communicated with each other on the surface of the metal substrate by using laser with the energy of 8000-15000 mu J to form a shark skin-imitated groove structure.
Further, the polymer material layer is polydimethylsiloxane gel;
mixing a first silicone oil with viscosity ranging from 100 to 500cps with polydimethylsiloxane according to the weight ratio of (0.1-1.5): 1, mixing in a volume ratio;
step 5 specifically comprises the following steps:
soaking the substrate with the polydimethylsiloxane gel formed on the surface in second silicone oil with the viscosity range of 5-100cps to make the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is less than that of the first silicone oil;
step 6 specifically comprises the following steps:
taking out and wiping the polydimethylsiloxane gel, wherein the second silicone oil seeps out from the gaps among the polydimethylsiloxane gel molecules to form a self-lubricating layer on the surface of the polydimethylsiloxane gel, so that the drag reduction structure with the self-lubricating layer is obtained.
Further, in step 2 ], a first silicone oil having a viscosity ranging from 100 to 500cps is mixed with polydimethylsiloxane in a ratio of (0.1 to 1.5): 1, mixing in a volume ratio of: (ii) a
When the viscosity of the first silicone oil is 100-200cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (1.2-1.5): 1;
when the viscosity of the first silicone oil is 200-400cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (0.5-1.2): 1;
when the viscosity of the first silicone oil is 400-500cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (0.1-0.5): 1.
The invention also provides an artificial joint with a self-lubricating layer, which comprises a first artificial prosthesis and a second artificial prosthesis which are matched with each other and is characterized in that,
the matching surface of the first artificial prosthesis and/or the matching surface of the second artificial prosthesis are/is provided with a high polymer material layer;
the polymer material layer comprises a first lubricating liquid and a polymer material, a second lubricating liquid is stored in a molecular gap of the polymer material layer, and the second lubricating liquid seeps out of the surface of the polymer material layer to form a self-lubricating layer; furthermore, the polymer material layer is doped with anti-infective drugs.
Further, the artificial joint also comprises a cushion plate which is arranged between the first artificial prosthesis and the second artificial prosthesis and is matched with the first artificial prosthesis and the second artificial prosthesis;
the matching surface of the first artificial prosthesis and/or the second artificial prosthesis and the base plate is provided with a high polymer material layer, and a self-lubricating layer is formed on the surface of the high polymer material layer.
Furthermore, the polymer material layer is polydimethylsiloxane gel;
the first lubricating liquid is first silicone oil with the viscosity ranging from 100cps to 500 cps;
the polydimethylsiloxane gel is formed by mixing and curing first silicone oil and polydimethylsiloxane, and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1;
the second lubricating liquid is second silicone oil with the viscosity ranging from 5 cps to 100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
The invention also provides a preparation method of the artificial joint with the self-lubricating layer, which is characterized by comprising the following steps:
mixing a first lubricating liquid with a high polymer material to obtain a liquid high polymer material;
2, coating a liquid polymer material on the contact surface of the first artificial prosthesis and/or the second artificial prosthesis;
3, after the liquid polymer material is solidified, forming a polymer material layer on the surface of the first artificial prosthesis and/or the second artificial prosthesis;
4, placing the first artificial prosthesis and/or the second artificial prosthesis with the polymer material layer formed on the surface into second lubricating liquid for soaking so that the second lubricating liquid is absorbed in the molecular gaps of the polymer material layer;
and 5, wiping the artificial joint after taking out, and enabling the second lubricating liquid to seep out from the molecular gaps of the polymer material layer to form a self-lubricating layer on the surface of the polymer material layer to obtain the artificial joint with the self-lubricating layer.
Further, the polymer material layer is polydimethylsiloxane gel;
mixing a first silicone oil with viscosity ranging from 100cps to 500cps with polydimethylsiloxane according to (0.1-1.5): 1, mixing according to a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
placing the prepared artificial joint of the polydimethylsiloxane gel into second silicone oil with the viscosity range of 5-100cps for soaking so that the second silicone oil is absorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is less than that of the first silicone oil;
step 5 specifically comprises the following steps:
taking out and wiping the artificial joint, wherein the second silicone oil seeps out from the gaps among the polydimethylsiloxane gel molecules to form a self-lubricating layer on the surface of the polydimethylsiloxane gel, so that the artificial joint with the self-lubricating layer is obtained.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the traditional drag reduction structure, the drag reduction structure provided by the invention isolates the contact between a solid and the liquid surface through the self-lubricating layer, is applied to the field of aircrafts, reduces the navigation resistance of the aircrafts in water, greatly improves the hydrophobic stability of the drag reduction structure, and simultaneously improves the capability of the aircrafts for resisting water pressure.
2. According to the drag reduction structure with the self-lubricating layer, the groove structure is arranged on the surface of the substrate, so that the hydrophobic property can be further improved, and when the drag reduction structure is applied to an aircraft, the navigation resistance of the aircraft in water can be effectively reduced, the navigation speed is increased, and the energy waste is reduced.
3. According to the drag reduction structure with the self-lubricating layer, the micro-nano rough structure is arranged on the surface of the substrate, so that the high polymer material layer can be better adhered to the surface of the substrate through the micro-nano rough structure, and the high polymer material layer is prevented from falling off.
4. According to the drag reduction structure with the self-lubricating layer, the high polymer material layer is polydimethylsiloxane gel which is a lubricating oil-philic material and can store a large amount of second silicone oil and is used for continuously seeping out to form the self-lubricating layer; and the polydimethylsiloxane gel is straight-chain silicone oil before solidification and has certain lubricity, so that in use, even if the self-lubricating layer is completely consumed, the polydimethylsiloxane gel covered on the surface of the substrate still has lyophobicity and lubricity, the service life of the drag reduction structure is prolonged, and the use cost is reduced.
5. Due to the self-lubricating layer, the drag reduction structure with the self-lubricating layer can prevent algae, shellfish and the like in water from attaching to the surface of the drag reduction structure when applied to an aircraft, and prevents the increase of the navigation resistance of the aircraft in water.
6. The invention provides a drag reduction structure with a self-lubricating layer, wherein a groove structure is provided with a plurality of side-by-side grooves at the sub-millimeter level to form a groove structure imitating rice leaves, or the groove structure is provided with a diamond-shaped groove with the width and the depth at the sub-millimeter level to form a groove structure imitating sharkskin, and the drag reduction structure is applied to a navigation device and can reduce the advancing drag of the navigation device; compared with a lotus leaf-like super-hydrophobic surface, the self-lubricating layer has stronger stability and can easily resist water pressure 40 meters deep under water.
7. The preparation method of the drag reduction material with the self-lubricating layer is convenient to prepare and wide in applicability.
8. Compared with the existing artificial joint, the high polymer material layer and the self-lubricating layer can continuously provide the second lubricating liquid, so that the friction force between joints is reduced, bacterial adhesion is effectively inhibited, and the artificial joint has important significance for prolonging the service life and improving the safety of the joints.
9. According to the artificial joint with the self-lubricating layer, the polymer material layer is polydimethylsiloxane gel which is a lubricating oil-philic material and can store a large amount of second silicone oil for continuously seeping out to form the self-lubricating layer; and the polydimethylsiloxane gel is a straight-chain silicone oil before solidification and has certain lubricity, so that in use, even if the self-lubricating layer is completely consumed, the polydimethylsiloxane gel on the surface of the first artificial prosthesis and/or the second artificial prosthesis still has lyophobicity and lubricity.
10. According to the artificial joint with the self-lubricating layer, the polydimethylsiloxane gel is also doped with a medicament for sterilizing and diminishing inflammation at the initial stage of implantation, and the self-release of the medicament is combined with the self-lubricating anti-adhesion performance of the self-lubricating coating, so that the antibacterial performance of the artificial joint is improved.
11. The preparation method of the artificial joint with the self-lubricating layer is simple and convenient, and solves the problems of large rigid contact friction force after artificial joint replacement and infection caused after implantation.
12. According to the preparation method of the artificial joint with the self-lubricating layer, the polydimethylsiloxane mixed solution can be completely coated on the surface of an irregular artificial joint, and the preparation method has good self-adaptability.
Drawings
FIG. 1 is a process flow diagram of steps 1-3 in step two of an embodiment of a method of preparing a drag reducing structure with a self-lubricating layer of the present invention (step 2 not shown);
FIG. 2 is a process flow diagram of step 1 to step 3 in an embodiment of a method for manufacturing a drag reduction structure with a self-lubricating layer according to the present invention (step 2 is not shown);
FIG. 3 is a process flow diagram of steps 1-3 of a second embodiment of a method of fabricating a drag reducing structure with a self-lubricating layer of the present invention, shown as a transverse cross-sectional view of a base material at various steps of the process flow (step 2 not shown);
FIG. 4 is a three-dimensional schematic diagram showing the relationship between the selection of the viscosity of the first silicone oil and the amount of the first silicone oil when the polydimethylsiloxane mixed solution is prepared in step 2 in the second embodiment of the preparation method of the present invention;
FIG. 5 is a schematic diagram of a structure of an upper surface of a substrate according to a seventh embodiment of the present invention;
FIG. 6 is a process flow diagram of step 1 to step 3 in step eight of the manufacturing method of the present invention (step 1.1 and step 2 are not shown);
figure 7 is a schematic structural diagram of a thirteen embodiment of an artificial joint having a self-lubricating layer according to the present invention.
The specific reference numbers are:
1-a first artificial prosthesis; 2-a second artificial prosthesis; 3-a polymer material layer; 4-self-lubricating layer.
Detailed Description
To further clarify the advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Example one
A drag reduction structure with a self-lubricating layer comprises a substrate, wherein a micro-nano rough structure is arranged on the upper surface of the substrate, and a groove structure is etched on the upper surface of the substrate provided with the micro-nano rough structure; the upper surface of the substrate and the surface of the groove structure are provided with an integrated polymer material layer, and the polymer material layer on the upper surface of the substrate extends into the micro-nano rough structure; the molecular gap of the polymer material layer is stored with second lubricating liquid, and the second lubricating liquid seeps out of the surface of the polymer material layer to form a self-lubricating layer. The polymer material layer is formed by mixing and curing a first lubricating liquid and a polymer material, the polymer material layer in the embodiment is polydimethylsiloxane gel (S-PDMS), the polydimethylsiloxane gel is formed by mixing and curing first silicone oil (high-viscosity silicone oil) with the viscosity ranging from 100cps to 500cps and Polydimethylsiloxane (PDMS), and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1. because the polydimethylsiloxane gel is a lubricating oil-philic material, a large amount of second lubricating liquid can be stored in the molecular gap of the polydimethylsiloxane gel, so that the second lubricating liquid can be continuously seeped to the surface of the polydimethylsiloxane gel, and a self-lubricating layer is formed on the surface of the polydimethylsiloxane gel. The second lubricating fluid in this embodiment is selected to be the second silicone oil (low viscosity silicone oil) having a viscosity in the range of 5 to 100cps, and it is necessary to ensure that the viscosity of the second silicone oil is lower than that of the first silicone oil when the viscosity is selected. In other embodiments, a lubricating liquid such as liquid paraffin can be selected to soak the polydimethylsiloxane gel on the substrate to form the self-lubricating layer. In other embodiments, the polymer material layer may also be made of other polymer materials, such as other polymer silicone gel, or hydrogel such as acrylamide hydrogel, polyvinyl alcohol hydrogel, or cellulose hydrogel, which are hydrophilic lubricating fluid materials, and can absorb and store the second lubricating fluid in the molecular gap. The first lubricating liquid and the second lubricating liquid in the hydrogel are deionized water, and a self-lubricating layer is formed on the surface of the hydrogel after the deionized water stored in the hydrogel molecular gaps seeps out. In the practical use process of the embodiment, when the content of the second silicone oil reaches the storage capacity of polydimethylsiloxane, the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously seep out to form a self-lubricating layer on the surface of the polydimethylsiloxane gel, and meanwhile, the self-lubricating layer can adsorb the second silicone oil in the molecular gaps of the polydimethylsiloxane gel until the second silicone oil is lower than the lowest adsorption concentration, and the second silicone oil cannot be released; however, because the polydimethylsiloxane gel is a straight-chain silicone oil before solidification and also has certain lubricity, the polydimethylsiloxane gel covered on the surface of the substrate still has lyophobicity and lubricity even if the self-lubricating layer is completely consumed in use, and therefore the service life of the drag reduction structure is prolonged. The drag reduction structure with the self-lubricating layer provided by the invention is simple in structure and wide in application range, can be directly applied to aircraft, and is used for reducing the navigation resistance of the aircraft in water and improving the water pressure resistance of the aircraft.
The micro-nano rough structure is arranged on the upper surface of the substrate, namely the micro-nano rough structure is arranged on the contact surface of the substrate and the high polymer material layer, so that the polydimethylsiloxane gel can be firmly adhered to the upper surface of the substrate through the rough surface characteristic of the micro-nano rough structure, and the polydimethylsiloxane gel is prevented from falling off. The micro-nano coarse structure is set to be a micro-nano porous structure in the embodiment, and can be set to be a micro-nano columnar structure or other micro-nano coarse structures in other embodiments. Meanwhile, in order to further reduce the advancing resistance of the underwater vehicle, the substrate is a metal substrate, the groove structure on the upper surface of the substrate is a plurality of grooves which are arranged side by side and have the sub-millimeter-level width and depth, the resistance reducing characteristic of the rice leaf is simulated, water flow can rapidly flow along the groove direction, but the flow in the direction vertical to the groove direction is limited, and therefore the advancing resistance of the underwater vehicle is reduced.
Compared with a lotus leaf-like super-hydrophobic anti-drag material, the groove structure design of the rice leaf-like structure is combined with the high polymer material layer on the upper surface of the substrate and the continuously formed self-lubricating layer, so that the surface of the anti-drag structure has higher hydrophobic stability, and can resist the water pressure of 40 meters underwater.
Example two
Based on the drag reduction structure with the self-lubricating layer in the first embodiment, the invention also provides a preparation method of the drag reduction structure with the self-lubricating layer, as shown in fig. 1 to 3, which specifically comprises the following steps:
1, preparing a micro-nano rough structure and a groove structure on the upper surface of a substrate;
1.1, ablating the upper surface of a substrate made of a metal material by using first laser with the energy of 100 mu J to form a uniformly distributed micro-nano rough porous structure;
and 1.2, etching a plurality of sub-millimeter-level grooves which are arranged side by side on the surface of a substrate made of a metal material by using second laser with the energy of 8000 mu J to form a rice leaf-imitated groove structure, and simultaneously sputtering around the grooves to form a new micro-nano rough structure during laser etching.
And 2, mixing the first silicone oil with the viscosity of 350cps with the polydimethylsiloxane according to the volume ratio of 0.9.
And 3, coating the polydimethylsiloxane mixed solution prepared in the step 2 on the upper surface of the substrate with the etched groove structure in the step 1.2, so that the polydimethylsiloxane mixed solution is uniformly adhered to the upper surface of the substrate and the groove structure. Note that when coating the trench structure, the polydimethylsiloxane mixed solution is coated only on a layer on the surface of the trench structure, and is not coated to be too thick so as to cover the trench structure.
And 4, solidifying the polydimethylsiloxane mixed solution to be coated, forming a layer of polydimethylsiloxane gel on the upper surface of the substrate and the surface of the groove structure, enabling the polydimethylsiloxane mixed solution on the upper surface of the substrate to penetrate into the micro-nano coarse structure, and firmly adhering the formed polydimethylsiloxane gel by using the coarse structure on the surface of the micro-nano coarse structure. The curing process can be heating curing or wiping curing and the like according to requirements, and the heating temperature is controlled according to the material and time requirements of the substrate. In order to save time, the polydimethylsiloxane mixed solution is heated and cured to form polydimethylsiloxane gel in the embodiment, and because the substrate of the embodiment is a metal material, ultraviolet light needs to be matched to promote chemical bonding between the polymer material layer and the metal substrate, so that firmness of the polymer material layer is enhanced.
And 5, placing the substrate with the polydimethylsiloxane gel formed on the surface into second silicone oil with the viscosity range of 50cps to be soaked for more than 48 hours, wherein the second silicone oil can be spontaneously adsorbed in the molecular gaps of the polydimethylsiloxane gel, and attention is paid to the fact that the viscosity of the second silicone oil is smaller than that of the first silicone oil.
And 6, taking out and wiping the soaked polydimethylsiloxane gel, wherein the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously seep out, and a self-lubricating layer is formed on the surface of the polydimethylsiloxane gel, so that the drag reduction structure with the self-lubricating layer is obtained.
Example three example six
Third embodiment to sixth embodiment of a method for manufacturing a drag reducing structure having a self-lubricating layer, which is substantially the same as the second embodiment, are different in the viscosity of the first silicone oil, the volume ratio of the first silicone oil to the polydimethylsiloxane, the viscosity of the second silicone oil, the first laser energy, and the second laser energy. Table 1 shows specific values of the viscosity of the first silicone oil, the volume ratio of the first silicone oil to the polydimethylsiloxane, and the viscosity of the second silicone oil in the third to sixth examples, and it can be seen that the selection of the viscosity of the first silicone oil and the dosage ratio of the first silicone oil have a correlation when the polydimethylsiloxane mixed solution is prepared according to the present invention. The viscosity range of the first silicone oil is 100-500cps, when the viscosity of the first silicone oil is selected to be lower, the volume of the first silicone oil is larger when the polydimethylsiloxane mixed solution is prepared, and similarly, the viscosity of the first silicone oil is selected to be higher, and the volume of the first silicone oil is smaller when the polymer solution is prepared. Preparing a polydimethylsiloxane mixed solution generally according to the proportion that the first silicone oil and the polydimethylsiloxane are (0.1-1.5): 1, specifically, when the viscosity of the first silicone oil is 100-200cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to (1.2-1.5): 1 is more effective; when the viscosity of the first silicone oil is 200-400cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to (0.5-1.2): 1, so that the effect is better; when the viscosity of the first silicone oil is 400-500cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to (0.1-0.5): 1, so that the effect is better; when the viscosity of the first silicone oil is more than 500cps, the viscosity is too high, stirring and mixing are difficult to perform in the preparation of a polydimethylsiloxane mixed solution, and the cured coating has poor toughness and is easily damaged. In addition, as can be seen from table 1, the viscosity of the second silicone oil, the first laser energy and the second laser energy are different, so that self-lubricating layers and groove structures with different properties can be prepared.
Table 1 table of specific values of each parameter in the third example to the sixth example
EXAMPLE seven
The drag reduction structure with a self-lubricating layer provided by this embodiment, as shown in fig. 5, differs from the first embodiment in that: the groove structure is arranged into grooves which are distributed in a rhombic shape with the width and the depth of sub-millimeter level and are communicated with each other, the white area is a laser processing area to form the rhombic groove, and the black line is a laser processing boundary. The diamond-shaped grooves mimic the drag reducing properties of sharkskin and serve to inhibit water turbulence, reduce turbulence, and thereby reduce the forward drag of the underwater vehicle. Other structures and effects of the present embodiment are the same as or similar to those of the first embodiment.
Example eight
Based on the drag reduction structure with the self-lubricating layer in the seventh embodiment, the invention further provides a preparation method of the drag reduction structure, and specifically as shown in fig. 6, except for the step 1.2, other steps in the eighth embodiment are the same as those in the second embodiment.
The step 1.2 specifically comprises the following steps:
1.2, etching a plurality of grooves which are distributed in a rhombus shape and are in sub-millimeter level in width and depth and are communicated with each other on the surface of a substrate made of a metal material by using laser with the energy of 8000 mu J to form a shark skin-imitated groove structure, and simultaneously sputtering around the rhombus groove to form a new micro-nano coarse structure during laser etching.
Example nine example twelve
Examples nine to twelve, the specific steps of the preparation method of example eight were adopted, and the differences from example eight are the viscosity of the first silicone oil, the volume ratio of the first silicone oil to the polydimethylsiloxane, the viscosity of the second silicone oil, the first laser energy and the second laser energy, which are specifically shown in table 2.
TABLE 2 tables of specific values of various parameters in nine examples to twelve examples
According to the invention, the high polymer material layer is arranged on the surface of the substrate, the self-lubricating layer is formed on the surface of the high polymer material layer, and the contact between a solid and the liquid surface is isolated through the self-lubricating layer, so that the hydrophobicity of the drag reduction structure is improved. The water-repellent structure is applied to the field of aircrafts, and the groove structure is arranged on the surface of the substrate, so that the water-repellent performance can be further improved, the navigation resistance of the aircrafts in water is reduced, the water-repellent stability of the water-repellent structure is greatly improved, the navigation speed is increased, and the energy waste is reduced. In addition, due to the self-lubricating layer, algae, shellfish and the like in the water cannot be attached to the surface of the drag reduction structure, and the increase of the navigation resistance of the aircraft in the water is further prevented.
EXAMPLE thirteen
An artificial joint with a self-lubricating layer is shown in figure 7 and comprises a first artificial prosthesis 1 and a second artificial prosthesis 2 which are matched, wherein polymer material layers 3 are arranged on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2; the molecular clearance of macromolecular material layer 3 has the second lubricating liquid of storing in, and the second lubricating liquid oozes and forms self-lubricating layer 4 on macromolecular material layer 3 surface, makes self-lubricating layer 4 on the first artificial prosthesis 1 and the self-lubricating layer 4 cooperation activity on the second artificial prosthesis 2 to reduce the friction of contact surface. In other embodiments of the present invention, the polymer material layer 3 may be disposed only on the mating surface of the first prosthesis 1 or the mating surface of the second prosthesis 2, so that the second prosthesis 2 and the self-lubricating layer 4 on the first prosthesis 1 may be in a matching motion, or the first prosthesis 1 and the self-lubricating layer 4 on the second prosthesis 2 may be in a matching motion, and the purpose of reducing the friction of the contact surface may also be achieved. In addition, in other embodiments, a backing plate which is matched with the first artificial prosthesis 1 and the second artificial prosthesis 2 for movement may be further disposed between the first artificial prosthesis 1 and the second artificial prosthesis 2, and the polymer material layer 3 is disposed on the matching surface of the first artificial prosthesis 1 and/or the second artificial prosthesis 2 and the backing plate, so that the self-lubricating layer 4 formed on the surface of the polymer material layer 3 is matched with the backing plate for movement, so as to reduce the friction of the contact surface. The macromolecular material layer is formed by first lubricated liquid and macromolecular material mixture solidification, because the macromolecular material layer is the softwood material, so the atress of artificial joint in the motion process can evenly disperse, and the second lubricated liquid that stores in the macromolecular material layer molecular gap can be extruded out in the motion process and form one deck self-lubricating layer in addition, and this is just similar to the lubricated liquid in the human joint. The self-lubricating layer 4 can reduce the friction force of the joint in the operation process, and has small abrasion to the base plate, compared with the existing artificial joint, the arrangement of the self-lubricating layer 4 not only reduces the friction force between joints, but also prolongs the service life of the artificial joint; in addition, because the friction between the base plate and the first artificial prosthesis 1 is very small, no sound is produced, and the life quality of the patient is improved.
The polymer material layer 3 in this embodiment is polydimethylsiloxane gel, which is formed by mixing and curing first silicone oil (high viscosity silicone oil) with a viscosity range of 100-500cps and polydimethylsiloxane, and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1. because the polydimethylsiloxane gel is a lubricating oil-philic material, a large amount of second lubricating liquid can be stored in the molecular gap of the polydimethylsiloxane gel, so that the second lubricating liquid can be continuously seeped to the surface of the polydimethylsiloxane gel, and a self-lubricating layer 4 is formed on the surface of the polydimethylsiloxane gel. The second lubricating fluid in this embodiment is selected to be the second silicone oil (low viscosity silicone oil) having a viscosity in the range of 5 to 100cps, and it is necessary to ensure that the viscosity of the second silicone oil is lower than that of the first silicone oil when the viscosity is selected. In other embodiments, the polymer material layer may also be another polymer material layer, such as another polymer silicone gel, or hydrogel such as acrylamide hydrogel, polyvinyl alcohol hydrogel, or cellulose hydrogel, which are hydrophilic lubricating fluid materials, and the second lubricating fluid can be absorbed and stored in the molecular gap. The first lubricating liquid and the second lubricating liquid in the hydrogel are deionized water, and a self-lubricating layer is formed on the surface of the hydrogel after the deionized water stored in the hydrogel molecular gaps seeps out. In the practical use process of the embodiment, when the content of the second silicone oil reaches the storage capacity of polydimethylsiloxane, the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously seep out to form a self-lubricating layer on the surface of the polydimethylsiloxane gel, and meanwhile, the self-lubricating layer can adsorb the second silicone oil in the molecular gaps of the polydimethylsiloxane gel until the second silicone oil is lower than the lowest adsorption concentration, and the second silicone oil cannot be released; however, because the polydimethylsiloxane gel is a straight-chain silicone oil before solidification and also has certain lubricity, the polydimethylsiloxane gel on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 still has lyophobicity and lubricity even if the self-lubricating layer is completely consumed in use. Meanwhile, second silicone oil can be injected into the artificial joint through local sealing so as to supplement the lubricating property of the artificial joint, the self-lubricating layer 4 is formed again, and the service life of the artificial joint is prolonged.
In addition, in order to promote the antibacterial property of the artificial joint, the polydimethylsiloxane gel can be doped with anti-infective drugs, the self-release of the anti-infective drugs is combined with the self-lubricating anti-adhesion property of the self-lubricating layer, the sterilization and anti-inflammation can be performed at the initial stage of the implantation of the artificial joint to effectively inhibit the adhesion of bacteria, and the artificial joint has important significance in prolonging the service life and improving the safety of the artificial joint. Meanwhile, by utilizing the characteristics of polydimethylsiloxane, the polydimethylsiloxane mixture has good self-adaptability in a liquid state and can be adhered to the surfaces of various materials and curved or irregular materials, preferably, the rough structures are arranged on the first artificial prosthesis 1 and the second artificial prosthesis 2, and the self-lubricating layer 4 can be further firmly adhered to the surfaces of the first artificial prosthesis 1 and the second artificial prosthesis 2, so that the macromolecular layer of the existing artificial joint is replaced. In order to make the rough structure on the surface of the first artificial prosthesis 2 finer, the rough structure is processed by a femtosecond laser in this embodiment.
Example fourteen
Based on the artificial joint with the lubricating layer in the thirteenth embodiment, the invention also provides a preparation method of the artificial joint with the lubricating layer, which specifically comprises the following steps:
and 1, mixing the first silicone oil with the viscosity of 350cps and the polydimethylsiloxane according to the volume ratio of 0.9.
The preparation method of the polydimethylsiloxane mixed solution in this embodiment is the same as that of the polydimethylsiloxane mixed solution in the second embodiment. In order to further improve the antibacterial performance of the artificial joint, the first silicone oil and the polydimethylsiloxane are mixed in proportion, and then some anti-infective drugs are doped.
And 2. Coating the polydimethylsiloxane mixed solution on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 respectively, wherein the polydimethylsiloxane mixed solution has good adaptivity, can be well coated on the surfaces of the first artificial prosthesis 1 and the second artificial prosthesis 2, and is firmly adhered.
And 3, heating at the temperature of 60 ℃ to solidify the polydimethylsiloxane mixed solution, and respectively forming polydimethylsiloxane gel on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2. Wherein, the curing process can select heating curing or dry curing and the like according to the requirements, and the heating curing needs to control the heating temperature according to the material and time requirements of the artificial joint.
And 4, immersing the artificial joint forming the polydimethylsiloxane gel into second silicone oil with the viscosity of 50cps for 30-50 hours, wherein the second silicone oil can be spontaneously adsorbed in the molecular gaps of the polydimethylsiloxane gel, and the viscosity of the second silicone oil is lower than that of the first silicone oil.
And 5, taking out the soaked artificial joint, wiping the artificial joint dry for a period of time, wherein the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously seep out, and a self-lubricating layer 4 is formed on the surface of the polydimethylsiloxane gel, namely the polydimethylsiloxane gel and the self-lubricating layer 4 are sequentially formed on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 respectively, and the preparation of the artificial joint with the self-lubricating layer is completed.
In addition, when the self-lubricating layer 4 in the artificial joint is completely consumed, the artificial joint provided by the invention can be supplemented and repaired, taking the self-lubricating layer 4 on the first artificial prosthesis 1 as an example, the supplementing and repairing method specifically comprises the following steps: and second silicone oil with the viscosity range of 5-100cps is poured into the needle tube, then the needle head is sterilized and then is inserted into the polymer material layer 3 of the artificial joint, namely the polydimethylsiloxane gel, the injected second silicone oil can be stored in the molecular gaps of the polydimethylsiloxane gel, when the content of the second silicone oil reaches the storage capacity of the polydimethylsiloxane, the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously seep out, and the self-lubricating layer 4 can be formed on the surface of the polydimethylsiloxane gel again, so that the aims of supplementing and repairing are fulfilled.
The above are only some preferred embodiments of the present invention, and in other embodiments of the present invention, the volume ratio of the first silicone oil to the polydimethylsiloxane may be adjusted according to the viscosity of the first silicone oil; the viscosity of the second silicone oil is adjusted according to the viscosity of the first silicone oil, so that the viscosity of the second silicone oil cannot be higher than that of the first silicone oil. Meanwhile, in the embodiment of the present invention using other polymer material layers, such as other polymer silicone gels, and hydrogels such as acrylamide hydrogel, polyvinyl alcohol hydrogel or cellulose hydrogel, the corresponding liquid polymer material can be obtained by using the presently disclosed preparation method. When the high polymer material layer is hydrogel, a large amount of deionized water is stored in the molecular gaps during preparation, so that the hydrogel can be prevented from being soaked, the deionized water in the molecular gaps of the hydrogel can automatically seep out, and a self-lubricating layer is formed on the surface of the hydrogel.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and it will be apparent to those skilled in the art that modifications may be made to the specific technical solutions described in the above embodiments or equivalent substitutions for some technical features, and these modifications or substitutions may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (13)
1. A drag reducing structure having a self-lubricating layer comprising a substrate, characterized in that:
the micro-nano rough structure is arranged on the upper surface of the substrate, and a groove structure is etched on the upper surface of the substrate provided with the micro-nano rough structure;
the upper surface of the substrate and the surface of the groove structure are provided with an integrated polymer material layer, and the polymer material layer on the upper surface of the substrate extends into the micro-nano rough structure; the polymer material layer comprises first lubricating liquid and a polymer material, second lubricating liquid is stored in the molecular gaps of the polymer material layer, and the second lubricating liquid continuously seeps out of the surface of the polymer material layer to form a self-lubricating layer.
2. A drag reducing construction with a self-lubricating layer as set forth in claim 1, wherein:
the polymer material layer is polydimethylsiloxane gel;
the first lubricating liquid is first silicone oil with the viscosity ranging from 100cps to 500 cps;
the polydimethylsiloxane gel is formed by mixing and curing first silicone oil and polydimethylsiloxane, and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1;
the second lubricating liquid is second silicone oil with the viscosity ranging from 5 cps to 100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
3. A drag reducing structure with a self-lubricating layer as claimed in claim 1 or 2, characterized in that:
the groove structure is a plurality of grooves which are arranged side by side and have the width and the depth of the sub-millimeter level, or a plurality of grooves which are distributed in a diamond shape and have the width and the depth of the sub-millimeter level and are communicated with each other;
the substrate is a metal substrate.
4. A method of making a drag reducing structure having a self-lubricating layer for making a drag reducing structure having a self-lubricating layer as claimed in any one of claims 1 to 3, comprising the steps of:
1, preparing a micro-nano rough structure and a groove structure on the upper surface of a substrate;
mixing the first lubricating liquid with a high polymer material, and uniformly stirring to obtain a liquid high polymer material;
coating a liquid polymer material on the surface of the substrate with the prepared micro-nano rough structure and the prepared groove structure, so that the liquid polymer material is uniformly adhered to the surface of the substrate, the inside of the micro-nano rough structure and the surface of the groove structure;
4, curing the liquid polymer material to form a polymer material layer on the surface of the substrate;
soaking the substrate with the polymer material layer formed on the surface in a second lubricating liquid to enable the second lubricating liquid to be adsorbed in the molecular gaps of the polymer material layer;
and 6, after being taken out, the second lubricating liquid seeps out from the molecular gaps of the high polymer material layer to form a self-lubricating layer on the surface of the high polymer material layer, so that the drag reduction structure with the self-lubricating layer is obtained.
5. A method of making a drag reducing structure with a self-lubricating layer as recited in claim 4 wherein:
in the step 1, the preparation of the micro-nano rough structure and the groove structure on the substrate surface specifically comprises the following steps:
1.1, ablating the surface of a substrate made of a metal material by using laser with energy of 100-3000 mu J to form a micro-nano porous structure;
1.2, etching a plurality of side-by-side grooves with the width and the depth of sub-millimeter level on the surface of a metal substrate by using laser with the energy of 8000-15000 mu J to form a groove structure imitating rice leaves;
or, etching a plurality of rhombic grooves which are distributed and communicated with each other and have the width and the depth of sub-millimeter level on the surface of the metal substrate by using laser with the energy of 8000-15000 mu J to form a shark skin-imitated groove structure.
6. A method of making a drag reducing structure with a self-lubricating layer as recited in claim 5 wherein:
the polymer material layer is polydimethylsiloxane gel;
step 2 specifically comprises the following steps:
mixing a first silicone oil with viscosity ranging from 100cps to 500cps with polydimethylsiloxane according to (0.1-1.5): 1, mixing according to a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
step 5 specifically comprises the following steps:
soaking the substrate with the surface formed with the polydimethylsiloxane gel in second silicone oil with the viscosity range of 5-100cps to ensure that the second silicone oil is absorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is less than that of the first silicone oil;
step 6 specifically comprises the following steps:
taking out and wiping the polydimethylsiloxane gel, wherein the second silicone oil seeps out from the gaps among the polydimethylsiloxane gel molecules to form a self-lubricating layer on the surface of the polydimethylsiloxane gel, so that the drag reduction structure with the self-lubricating layer is obtained.
7. A method of making a drag reducing structure with a self-lubricating layer as recited in claim 6 wherein:
in step 2, a first silicone oil having a viscosity ranging from 100 to 500cps is mixed with polydimethylsiloxane in a ratio of (0.1 to 1.5): 1, mixing in a volume ratio of:
when the viscosity of the first silicone oil is 100-200cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (1.2-1.5): 1;
when the viscosity of the first silicone oil is 200-400cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (0.5-1.2): 1;
when the viscosity of the first silicone oil is 400-500cps, the mixing volume ratio of the first silicone oil and the polydimethylsiloxane is set to be (0.1-0.5): 1.
8. An artificial joint with a self-lubricating layer, comprising a first (1) and a second (2) prosthesis cooperating, characterized in that:
the matching surface of the first artificial prosthesis (1) and/or the matching surface of the second artificial prosthesis (2) are/is provided with a polymer material layer (3);
the polymer material layer (3) comprises first lubricating liquid and a polymer material, second lubricating liquid is stored in the molecular gap of the polymer material layer (3), and the second lubricating liquid seeps out of the surface of the polymer material layer (3) to form a self-lubricating layer (4).
9. An artificial joint having a self-lubricating layer according to claim 7, wherein:
the polymer material layer (3) is doped with anti-infective drugs.
10. An artificial joint having a self-lubricating layer according to claim 8, wherein:
the base plate is arranged between the first artificial prosthesis (1) and the second artificial prosthesis (2) and matched with the first artificial prosthesis (1) and the second artificial prosthesis (2);
the first artificial prosthesis (1) and/or the second artificial prosthesis (2) are/is provided with a high polymer material layer (3) on the matching surface with the backing plate, and a self-lubricating layer (4) is formed on the surface of the high polymer material layer (3).
11. An artificial joint having a self-lubricating layer according to any one of claims 8 to 10, wherein:
the polymer material layer (3) is polydimethylsiloxane gel;
the first lubricating liquid is first silicone oil with the viscosity ranging from 100cps to 500 cps;
the polydimethylsiloxane gel is formed by mixing and curing first silicone oil and polydimethylsiloxane, and the volume ratio of the first silicone oil to the polydimethylsiloxane is (0.5-1.5): 1;
the second lubricating liquid is second silicone oil with the viscosity ranging from 5 cps to 100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
12. A method for preparing an artificial joint having a self-lubricating layer, which is used for preparing an artificial joint having a self-lubricating layer according to any one of claims 8 to 11, wherein:
mixing a first lubricating liquid with a high polymer material to obtain a liquid high polymer material;
2, coating liquid high polymer materials on the contact surface of the first artificial prosthesis (1) and/or the second artificial prosthesis (2);
3, after the liquid polymer material is solidified, forming a polymer material layer (3) on the surface of the first artificial prosthesis (1) and/or the second artificial prosthesis (2);
4, placing the first artificial prosthesis (1) and/or the second artificial prosthesis (2) with the surface formed with the polymer material layer (3) into a second lubricating liquid for soaking so as to enable the second lubricating liquid to be adsorbed in the molecular gaps of the polymer material layer (3);
and 5, after taking out, the second lubricating liquid seeps out from the molecular gaps of the polymer material layer (3), and a self-lubricating layer (4) is formed on the surface of the polymer material layer (3), so that the artificial joint with the self-lubricating layer is obtained.
13. The method for preparing an artificial joint having a self-lubricating layer according to claim 12, wherein:
the polymer material layer (3) is polydimethylsiloxane gel;
step 1 specifically comprises the following steps:
mixing a first silicone oil with viscosity ranging from 100cps to 500cps with polydimethylsiloxane according to (0.1-1.5): 1, mixing according to a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
step 4 specifically comprises the following steps:
placing the prepared artificial joint with the polydimethylsiloxane gel attached to the surface into second silicone oil with the viscosity range of 5-100cps for soaking so that the second silicone oil is adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is less than that of the first silicone oil;
step 5 specifically comprises the following steps:
taking out and wiping the artificial joint, wherein the second silicone oil seeps out from the gaps among the polydimethylsiloxane gel molecules to form a self-lubricating layer (4) on the surface of the polydimethylsiloxane gel, so that the artificial joint with the self-lubricating layer is obtained.
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| 丁军鹏: "PDMS表面微槽结构对摩擦副摩擦性能影响的研究", 中国优秀硕士学位论文全文数据库, pages 004 - 4 * |
| 彭杰: "表面图案化或自修复润滑性PDMS防覆冰涂层的研究", 中国优秀硕士学位论文全文数据库, pages 020 - 13 * |
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