CN115591023B - 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 PDF

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CN115591023B
CN115591023B CN202211216129.7A CN202211216129A CN115591023B CN 115591023 B CN115591023 B CN 115591023B CN 202211216129 A CN202211216129 A CN 202211216129A CN 115591023 B CN115591023 B CN 115591023B
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polymer material
silicone oil
self
lubricating
high polymer
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CN115591023A (en
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陈烽
缑晓丹
杨青
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Xian Jiaotong University
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Xian Jiaotong University
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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
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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 thereof, 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 aircrafts, the drag reduction performance is easy to break, and the rigid contact friction force, abrasion and infection existing in the existing artificial joint are large. The drag reduction structure comprises a substrate, wherein the upper surface of the substrate is provided with a micro-nano coarse structure and a groove structure; the upper surface of the substrate and the surface of the groove structure are provided with an integrated polymer material layer which 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 from molecular gaps of the polymer material layer and forms a self-lubricating layer on the surface of the second lubricating liquid. The invention provides an artificial joint comprising 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

Drag reduction structure with self-lubricating layer, artificial joint and preparation method
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 polymer drag-reducing material, also called polymer antifriction material, has the characteristics of small friction coefficient and wear resistance, is widely applied, and has various applications in the fields of aircrafts, medical treatment and the like.
In the field of aircrafts, the method has great significance in improving the running efficiency and the energy utilization rate of the aircrafts and realizing pipeline transportation or navigation drag reduction. The existing drag reduction technology of the aircraft mainly comprises polymer drag reduction, coating drag reduction, cavitation drag reduction and the like. High polymer drag reduction is by adding polymers, such as drag reducing agents or surface modifying agents, to the fluid to reduce the flow resistance; from the bionic point of view, the coating drag reduction is mainly realized by preparing dolphin skin-imitated flexible films or modifying low surface energy into a hydrophobic drag reduction coating on the surfaces of a ship body and the like; cavitation drag reduction mainly utilizes low friction between gas and liquid to change the flow structure of a boundary layer, but energy, equipment and the like are additionally provided for generating micro bubbles, so that the cavitation drag reduction is difficult to be practically applied; the methods have the phenomena of additional chemical reagent, difficult long-time use, easily damaged drag reduction performance and the like, and are difficult to be practically applied.
In the medical field, with the increasing aging, artificial joint replacement surgery is becoming more and more common. Artificial joints are usually composed of three parts, including an artificial prosthesis fixed on bones on two sides of a human body and a pad located between the artificial prostheses on two sides, wherein the artificial prosthesis is made of materials including stainless steel, cobalt-chromium-molybdenum alloy, titanium alloy, ceramic and the like, and the pad is worn, so that the service life of the pad determines the service life of the artificial joint. The majority of the prior backing plates are made of polyethylene materials, the service life of the prior backing plates is about 15 years, and with the development of technology, the prior backing plates are made of ultra-high molecular weight polyethylene (UHMWPE). In the prior art, the service life of the artificial joint can reach 50 years to 500 years theoretically, but in actual use, due to the influence of various factors, the artificial joint has more renovation cases, wherein abrasion and infection are one of main factors. In addition, the artificial joint replacement has a problem that the rigid contact friction force is large because the contact surface between the artificial prosthesis of the joint and the pad is insufficient in lubrication liquid, so that sounds are generated due to friction in joint movement, some sounds can be heard even by people beside the patient, the sounds are continuously generated, and the psychological disorder or the larger problem may further occur to the patient with psychological weakness.
Disclosure of Invention
The invention aims to solve the technical problems that the existing high polymer drag reduction material is difficult to use for a long time in the field of aircrafts, the drag reduction performance is easy to break, and the existing artificial joint in the medical field has large rigid contact friction force, and is worn and infected, and provides a drag reduction 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:
the drag reduction structure with the self-lubricating layer is characterized by comprising a substrate;
the substrate is a metal substrate, the upper surface of the substrate is provided with a micro-nano coarse structure, and a groove structure is etched on the upper surface of the substrate provided with the micro-nano coarse structure;
the upper surface of the substrate and the surface of the groove structure are provided with integrated polymer material layers, and the polymer material layers on the upper surface of the substrate extend into the micro-nano rough structure;
the high polymer material layer comprises a first lubricating liquid and a high polymer material, wherein a second lubricating liquid is stored in a molecular gap of the high polymer material layer, and the second lubricating liquid seeps out on the surface of the high polymer material layer to form a self-lubricating layer; further, the high 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, a step of;
the second lubricating liquid is second silicone oil with the viscosity in the range of 5-100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
Further, the groove structure is a plurality of grooves with the width and depth of sub-millimeter level, and a surface structure imitating rice leaves is formed; or grooves with the width and the depth of sub-millimeter level are distributed in a diamond shape and are communicated with each other, so that a shark skin-like surface structure is formed; 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:
preparing a micro-nano rough structure and a groove structure on the upper surface of a substrate;
mixing the first lubricating liquid with the 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 coarse structure and the groove structure, so that the liquid polymer material is uniformly adhered on the surface of the substrate, the micro-nano coarse structure and the surface of the groove structure;
Solidifying the liquid high polymer material to form a high polymer material layer on the surface of the substrate;
putting the substrate with the high polymer material layer formed on the surface into a second lubricating liquid for soaking, so that the second lubricating liquid is adsorbed in the molecular gaps of the high polymer material layer;
and 6, wiping and drying after taking out, wherein the second lubricating liquid seeps out from molecular gaps of the high polymer material layer, and a self-lubricating layer is formed on the surface of the high polymer material layer, so that the drag reduction structure with the self-lubricating layer is obtained.
Further, in step 1 ], the preparation of the micro-nano rough structure and the groove structure on the upper surface of the substrate is specifically:
1.1, ablating the surface of a metal substrate by using laser with the energy of 100-3000 mu J to form a micro-nano porous structure;
1.2, etching a plurality of grooves with the width and 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 grooves which are distributed in a diamond shape with the width and depth of a submillimeter level and are mutually communicated on the surface of the metal substrate by using laser with the energy of 8000-15000 mu J to form a groove structure imitating shark skin.
Further, the high polymer material layer is polydimethylsiloxane gel;
The step 2 is specifically as follows:
mixing a first silicone oil having a viscosity in the range of 100 to 500cps with polydimethylsiloxane (0.1 to 1.5): mixing in a volume ratio of 1;
the step 5 is specifically as follows:
soaking the substrate with the surface formed with the polydimethylsiloxane gel in second silicone oil with the viscosity ranging from 5 cps to 100cps so that the second silicone oil is adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is smaller than that of the first silicone oil;
the step 6 is specifically as follows:
and taking out and drying, wherein the second silicone oil seeps out from the molecular gaps of the polydimethylsiloxane gel, 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.
Further, in step 2), a first silicone oil having a viscosity ranging from 100 to 500cps is mixed with polydimethylsiloxane in an amount of (0.1 to 1.5): the mixing of the volume ratio 1 is specifically as follows: the method comprises the steps of carrying out a first treatment on the surface of the
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 high polymer material layer comprises a first lubricating liquid and a high polymer material, wherein a second lubricating liquid is stored in a molecular gap of the high polymer material layer, and the second lubricating liquid seeps out to form a self-lubricating layer on the surface of the high polymer material layer; further, the high polymer material layer is doped with an anti-infective drug.
Further, the artificial implant also comprises a backing 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 backing 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.
Further, the high polymer material layer is polydimethylsiloxane gel;
the first lubricating liquid is first silicone oil with the viscosity ranging from 100 cps 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, a step of;
The second lubricating liquid is second silicone oil with the viscosity in the range of 5-100cps, 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 the first lubricating liquid with a high polymer material to obtain a liquid high polymer material;
coating liquid high polymer material on the contact surface of the first artificial prosthesis and/or the second artificial prosthesis;
solidifying the liquid high polymer material, and forming a high polymer material layer on the surface of the first artificial prosthesis and/or the second artificial prosthesis;
the first artificial prosthesis and/or the second artificial prosthesis with the surface provided with the high polymer material layer are/is placed into the second lubricating liquid for soaking, so that the second lubricating liquid is adsorbed in the molecular gaps of the high polymer material layer;
and 5, taking out and wiping, wherein the second lubricating liquid seeps out from the molecular gaps of the high polymer material layer, and a self-lubricating layer is formed on the surface of the high polymer material layer, so that the artificial joint with the self-lubricating layer is obtained.
Further, the high polymer material layer is polydimethylsiloxane gel;
the step 1 is specifically as follows:
mixing a first silicone oil having a viscosity in the range of 100 to 500cps with polydimethylsiloxane (0.1 to 1.5): 1, mixing the components in a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
The step 4 is specifically as follows:
immersing the artificial joint of the prepared polydimethylsiloxane gel in second silicone oil with the viscosity ranging from 5 cps to 100cps so that the second silicone oil is adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is smaller than that of the first silicone oil;
the step 5 is specifically as follows:
and taking out and drying, wherein the second silicone oil seeps out from the molecular gaps of the polydimethylsiloxane gel, and a self-lubricating layer is formed 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 has the advantages that the contact between solid and liquid surfaces is isolated through the self-lubricating layer, the navigation resistance of the aircraft in water is reduced, the hydrophobic stability of the drag reduction structure is greatly improved, the capacity of resisting water pressure of the aircraft is also improved, and the drag reduction structure is simple and has wide application prospect.
2. The drag reduction structure with the self-lubricating layer provided by the invention has the advantages that the groove structure is arranged on the surface of the substrate, so that the water repellency can be further improved, the drag reduction structure with the self-lubricating layer can be applied to a craft, the navigation resistance of the craft in water can be effectively reduced, the navigation speed can be improved, and the energy waste can be 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. The drag reduction structure with the self-lubricating layer provided by the invention has the advantages that the high polymer material layer is polydimethylsiloxane gel which is a lubricating oil material, and a large amount of second silicone oil can be stored for continuously exuding 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 covered on the surface of the substrate still has liquid repellency and lubricity, thereby prolonging the service life of the drag reduction structure and reducing the use cost.
5. The drag reduction structure with the self-lubricating layer, which is provided by the invention, can prevent algae, shellfish and the like in water from being attached to the surface of the drag reduction structure due to the existence of the self-lubricating layer when the drag reduction structure is applied to an aircraft, so that the increase of the navigation resistance of the aircraft in water is prevented.
6. The drag reduction structure with the self-lubricating layer is provided with a plurality of side-by-side grooves in a sub-millimeter level to form a groove structure imitating rice leaves, or is provided with diamond grooves in a sub-millimeter level in width and depth to form a groove structure imitating shark skin, and the drag reduction structure is applied to an aircraft and can reduce the forward resistance of the aircraft; the self-lubricating layer has stronger stability compared with the superhydrophobic surface imitating lotus leaves, and can easily resist water pressure of 40 meters deep under water.
7. The preparation method of the drag reduction material with the self-lubricating layer provided by the invention is convenient to prepare and wide in applicability.
8. According to the artificial joint with the self-lubricating layer, the high polymer material layer is arranged on the matching surface of the first artificial prosthesis and/or the second artificial prosthesis, the second lubricating liquid is stored in the molecular gaps of the high polymer material layer, and oozes out of the surface of the high polymer material layer to form the self-lubricating layer.
9. The artificial joint with the self-lubricating layer provided by the invention has the advantages that the high polymer material layer is polydimethylsiloxane gel which is a lubricating oil material, and a large amount of second silicone oil can be stored for continuously exuding to form the self-lubricating layer; and the polydimethylsiloxane gel is a linear silicone oil before solidification, and has certain lubricity, so that in use, the polydimethylsiloxane gel on the surface of the first artificial prosthesis and/or the second artificial prosthesis has liquid repellency and lubricity even if the self-lubricating layer is completely consumed.
10. According to the artificial joint with the self-lubricating layer, the polydimethylsiloxane gel is further doped with the medicines for sterilizing and diminishing inflammation at the initial stage of implantation, and the self-release of the medicines 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 high rigid contact friction force after the replacement of the artificial joint and infection caused after implantation.
12. According to the preparation method of the artificial joint with the self-lubricating layer, provided by the invention, the polydimethylsiloxane mixed solution can be completely coated on the surface of an irregular artificial joint, and the self-adaptation is good.
Drawings
FIG. 1 is a process flow chart (step 2 is not shown) of steps 1-3 in a second embodiment of a drag reducing structure with a self-lubricating layer according to the present invention;
FIG. 2 is a process flow chart (step 2 is not shown) of steps 1-3 in a second embodiment of a method for fabricating a drag reducing structure with a self-lubricating layer according to the present invention;
FIG. 3 is a process flow chart of step 1-step 3 of a second embodiment of a drag reducing structure with self-lubricating layer according to the present invention, wherein the process flow chart is shown as a cross-sectional view of the substrate material in each step of the process flow (step 2 is not shown);
FIG. 4 is a three-dimensional schematic diagram showing the relationship between the viscosity selection of the first silicone oil and the usage ratio of the first silicone oil when preparing the polydimethylsiloxane mixed solution in step 2 of the second embodiment of the preparation method of the present invention;
FIG. 5 is a schematic view of the structure of the upper surface of a substrate according to a seventh embodiment of the present invention;
FIG. 6 is a process flow chart of step 1-step 3 (steps 1.1 and 2 are not shown) in an eighth embodiment of the method of the present invention;
FIG. 7 is a schematic view of an artificial joint with a self-lubricating layer according to a thirteenth embodiment of the present invention.
The specific reference numerals are as follows:
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 1
The drag reduction structure with the self-lubricating layer comprises a substrate, wherein a micro-nano coarse 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 coarse structure; the upper surface of the substrate and the surface of the groove structure are provided with integrated polymer material layers, and the polymer material layers on the upper surface of the substrate extend into the micro-nano rough structure; the second lubricating liquid is stored in the molecular gaps of the high polymer material layer, and the second lubricating liquid seeps out on the surface of the high 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 polymer material layer 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 material, a large amount of second lubricating liquid can be stored in a molecular gap of the polydimethylsiloxane gel so as to ensure that the second lubricating liquid can continuously seep out to the surface of the polydimethylsiloxane gel and form a self-lubricating layer on the surface of the polydimethylsiloxane gel. The second lubricating liquid in this embodiment selects a 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 smaller than that of the first silicone oil at the time of viscosity selection. In other embodiments, a self-lubricating layer may be formed by immersing the polydimethylsiloxane gel on the substrate in a lubricating liquid such as liquid paraffin. In addition, in other embodiments, other polymer materials, such as other polymer silica gel, or hydrogels such as acrylamide hydrogel, polyvinyl alcohol hydrogel, or cellulose hydrogel, which are all materials with a lubricating fluid, can be used as the polymer material layer, and the second lubricating fluid can be absorbed and stored in the molecular gaps. 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 a molecular gap of the hydrogel seeps out. In the practical use process of the embodiment, 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 exude, a self-lubricating layer is formed on the surface of the polydimethylsiloxane gel, and 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, since the polydimethylsiloxane gel is a linear silicone oil before solidification, it also has a 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 has liquid repellency and lubricity, thereby prolonging the service life of the drag-reducing structure. The drag reduction structure with the self-lubricating layer is simple, has a wide application range, can be directly applied to an aircraft, and is used for reducing the navigation resistance of the aircraft in water and improving the capability of the aircraft for resisting water pressure.
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, and the micro-nano rough structure can firmly adhere the polydimethylsiloxane gel on the upper surface of the substrate through the rough surface characteristic of the micro-nano rough structure so as to prevent the polydimethylsiloxane gel from falling off. The micro-nano rough 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 rough structures in other embodiments. Meanwhile, in order to further reduce the forward resistance of the underwater vehicle, the substrate in the embodiment 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 width and depth of the sub-millimeter level, the drag reduction characteristics of rice leaves are simulated, water flow can flow rapidly along the groove direction, but the flow perpendicular to the groove direction is limited, and therefore the forward resistance of the underwater vehicle is reduced.
Compared with the super-hydrophobic drag reduction material imitating lotus leaves, the groove structure design imitating rice leaves of the embodiment combines 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 drag reduction structure has higher strong hydrophobic stability and can resist water pressure 40 meters deep under water.
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. 1-3, specifically comprising the following steps:
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 metal by using first laser with the energy of 100 mu J to form a micro-nano rough porous structure which is uniformly distributed;
and 1.2, etching a plurality of sub-millimeter-level grooves which are arranged side by side on the surface of the metal substrate by using second laser with the energy of 8000 mu J to form a paddy-like She Goucao structure, and sputtering around the grooves to form a new micro-nano coarse structure during laser etching.
Mixing first silicone oil with the viscosity of 350cps with polydimethylsiloxane according to the volume ratio of 0.9:1, and uniformly stirring to obtain the polydimethylsiloxane mixed solution.
And 3, coating the polydimethylsiloxane mixed solution prepared in the step 2 on the upper surface of the substrate etched with the groove structure in the step 1.2, so that the polydimethylsiloxane mixed solution is uniformly adhered on the upper surface of the substrate and in the groove structure. Note that when coating the trench structure, the polydimethylsiloxane mixed solution is only coated on one layer of the surface of the trench structure, and the coating is not too thick to cover the trench structure.
And 4, solidifying the mixed solution of the polydimethylsiloxane to be coated, wherein a layer of polydimethylsiloxane gel is formed on the upper surface of the substrate and the surface of the groove structure, the mixed solution of the polydimethylsiloxane on the upper surface of the substrate can permeate into the micro-nano coarse structure, and the formed polydimethylsiloxane gel is firmly adhered by utilizing the coarse structure on the surface of the micro-nano coarse structure. The curing process can be selected from heating curing or wiping curing according to the 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, and the substrate of the embodiment is made of a metal material, ultraviolet irradiation is also needed to be matched, so that chemical bonding between the high polymer material layer and the metal substrate is promoted, and the firmness of the high polymer material layer is enhanced.
And 5, immersing the substrate with the polydimethylsiloxane gel formed on the surface in second silicone oil with the viscosity range of 50cps for more than 48 hours, wherein the second silicone oil can be spontaneously adsorbed in molecular gaps of the polydimethylsiloxane gel, and the viscosity of the second silicone oil is less than that of the first silicone oil.
And 6, taking out and wiping after soaking, wherein the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously exude, and a self-lubricating layer is formed on the surface of the polydimethylsiloxane gel to obtain the drag reduction structure with the self-lubricating layer.
Examples three to six
An embodiment III-embodiment VI of a drag reducing structure having a self-lubricating layer is substantially the same as embodiment II, except that 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 are different. 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 examples III to VI, and it can be seen that the viscosity of the first silicone oil is selected in correlation with the use ratio of the first silicone oil when the polydimethylsiloxane mixed solution is prepared. The viscosity of the first silicone oil in the invention ranges from 100 to 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 likewise, 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. The polydimethyl siloxane mixed solution is prepared according to the first silicone oil and polydimethyl siloxane of (0.1-1.5): 1, in particular, 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 is better; 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, which has better effect; 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, which has better effect; 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 the polydimethylsiloxane mixed solution, and the cured coating has poor toughness and is easily broken. In addition, as can be seen from table 1, the second silicone oil viscosity, the first laser energy, and the second laser energy can be different to prepare the self-lubricating layer and the groove structure with different properties.
Table 1 specific numerical tables for each parameter in examples three to six
Example seven
The difference between the drag reducing structure with self-lubricating layer provided in this embodiment and the first embodiment is that, as shown in fig. 5: the groove structure is arranged into grooves which are distributed in a diamond shape with the width and the depth of a submillimeter level and are mutually communicated, the white area is a laser processing area, the diamond grooves are formed, and the black lines are laser processing boundaries. The diamond grooves simulate the drag reduction characteristics of shark skinning for inhibiting turbulence in the water, reducing turbulence and thereby reducing 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 also provides a preparation method thereof, and the preparation method is specifically shown in fig. 6, and the other steps in the eighth embodiment are the same as those in the first embodiment except for the step 1.2.
The step 1.2 is specifically as follows:
and 1.2, etching a plurality of diamond-shaped distributed and mutually communicated grooves with the width and depth of a submicron level on the surface of a metal substrate by using laser with the energy of 8000 mu J to form a groove structure imitating shark skin, and sputtering around the diamond-shaped groove to form a new micro-nano rough structure during laser etching.
Examples nine to twelve
Examples nine to twelve each employ the specific steps of the preparation method of example eight, differing from example eight 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, as shown in Table 2.
Table 2 specific numerical tables for each parameter in examples nine to twelve
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, the contact between the solid surface and the liquid surface is isolated through the self-lubricating layer, and the hydrophobicity of the drag reduction structure is improved. The invention 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 can be reduced, the water-repellent stability of the drag-reducing structure can be greatly improved, the navigation speed can be improved, and the energy waste can be reduced. Moreover, due to the existence of the self-lubricating layer, algae, shellfish and the like in the water cannot adhere 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 fig. 7, and comprises a first artificial prosthesis 1 and a second artificial prosthesis 2 which are matched, wherein a matching surface of the first artificial prosthesis 1 and a matching surface of the second artificial prosthesis 2 are both provided with a high polymer material layer 3; the second lubricating liquid is stored in the molecular gaps of the high polymer material layer 3, and oozes out on the surface of the high polymer material layer 3 to form a self-lubricating layer 4, so that the self-lubricating layer 4 on the first artificial prosthesis 1 and the self-lubricating layer 4 on the second artificial prosthesis 2 are matched and movable to reduce friction of contact surfaces. In other embodiments of the present invention, the polymer material layer 3 may be disposed only on the mating surface of the first artificial prosthesis 1 or the mating surface of the second artificial prosthesis 2, so that the second artificial prosthesis 2 and the self-lubricating layer 4 on the first artificial prosthesis 1 are mated and moved, or the first artificial prosthesis 1 and the self-lubricating layer 4 on the second artificial prosthesis 2 are mated and moved, so as to achieve the purpose of reducing friction of the contact surface. 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 can be arranged between the first artificial prosthesis 1 and the second artificial prosthesis 2, and a high polymer material layer 3 is arranged on the matching surface of the first artificial prosthesis 1 and/or the second artificial prosthesis 2 and the backing plate, so that a self-lubricating layer 4 is formed on the surface of the high polymer material layer 3 for matching movement with the backing plate, and friction of a contact surface is reduced. The high polymer material layer is formed by mixing and solidifying the first lubricating liquid and the high polymer material, and because the high polymer material layer is a soft material, the stress of the artificial joint in the movement process can be uniformly dispersed, and in addition, the second lubricating liquid stored in the molecular gaps of the high polymer material layer can be extruded out in the movement process to form a self-lubricating layer, so that the self-lubricating layer is similar to the lubricating liquid in the joint of a human body. The self-lubricating layer 4 can reduce the friction force of the joint in the running process, the abrasion to the backing plate is small, compared with the existing artificial joint, the self-lubricating layer 4 reduces the friction force between joints, and prolongs the service life of the artificial joint; in addition, since the friction between the pad and the first prosthesis 1 is small, no sound is emitted, and the quality of life of the patient is improved.
The polymer material layer 3 in this embodiment is a polydimethylsiloxane gel, which is formed by mixing and curing a first silicone oil (high viscosity silicone oil) with a viscosity ranging from 100 to 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 a molecular gap of the polydimethylsiloxane gel so as to ensure that the second lubricating liquid can continuously seep out 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 liquid in this embodiment selects a 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 smaller than that of the first silicone oil at the time of viscosity selection. In other embodiments, the polymer material layer may be another polymer material layer, for example, another polymer silica gel, or a hydrogel such as an acrylamide hydrogel, a polyvinyl alcohol hydrogel, or a cellulose hydrogel, which are all made of a lubricating fluid-philic material, and the second lubricating fluid may be absorbed and stored in the molecular gaps. 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 a molecular gap of the hydrogel seeps out. In the practical use process of the embodiment, 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 exude, a self-lubricating layer is formed on the surface of the polydimethylsiloxane gel, and 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, since the polydimethylsiloxane gel is a linear silicone oil before solidification, it also has a certain lubricity, and thus in use, the polydimethylsiloxane gel of the mating surfaces of the first prosthesis 1 and the second prosthesis 2 has liquid repellency and lubricity even if the self-lubricating layer is completely consumed. Meanwhile, the second silicone oil can be injected into the artificial joint through local sealing so as to supplement the lubricating performance of the artificial joint, and the self-lubricating layer 4 is formed again, so that the service life of the artificial joint is prolonged.
In addition, in order to improve the antibacterial performance of the artificial joint, the anti-infective medicament can be doped in the polydimethylsiloxane gel, the self-release of the anti-infective medicament and the self-lubricating anti-adhesion performance of the self-lubricating layer are combined, and the antibacterial anti-inflammation treatment can effectively inhibit bacterial adhesion at the initial stage of artificial joint implantation, so that the antibacterial anti-inflammation treatment method has important significance in improving the service life and safety of the artificial joint. Meanwhile, by utilizing the characteristics of the polydimethylsiloxane, the polydimethylsiloxane mixture has good self-adaptability in a liquid state, can be adhered to the surfaces of various materials and curved or irregular materials, and preferably, the first artificial prosthesis 1 and the second artificial prosthesis 2 are provided with rough structures, so that the self-lubricating layer 4 can be firmly adhered to the surfaces of the first artificial prosthesis 1 and the second artificial prosthesis 2, and the polymer layer of the existing artificial joint is replaced. The rough structure may be implemented in various manners, and in order to make the rough structure of the surface of the first prosthesis 2 finer, in this embodiment, the rough structure is processed by using a femtosecond laser.
Examples fourteen
Based on the above-mentioned thirteenth embodiment, the present invention further provides a method for preparing an artificial joint with a lubrication layer, which specifically includes the following steps:
Mixing first silicone oil with the viscosity of 350cps with polydimethylsiloxane according to the volume ratio of 0.9:1, and uniformly stirring to obtain the polydimethylsiloxane mixed solution.
The method for preparing the polydimethylsiloxane mixed solution in this example is the same as that in the second example. In order to further improve the antibacterial performance of the artificial joint, in the embodiment, when the first silicone oil and the polydimethylsiloxane are mixed in proportion, some anti-infective drugs are doped.
And 2, the polydimethylsiloxane mixed solution is coated on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 respectively, has good self-adaptability, 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 60 ℃ to solidify the mixed solution of the polydimethylsiloxane, and forming the polydimethylsiloxane gel on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 respectively. Wherein, the curing process can be selected to be heated and cured or dried and cured according to the requirements, and the heating and curing are required 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 in second silicone oil with the viscosity of 50cps for 30-50 hours, wherein the second silicone oil can be spontaneously adsorbed in molecular gaps of the polydimethylsiloxane gel, and the viscosity of the second silicone oil is less than that of the first silicone oil.
And 5, taking out the artificial joint after soaking, wiping for a period of time, wherein the second silicone oil adsorbed in the molecular gaps of the polydimethylsiloxane gel can spontaneously exude, and forming a self-lubricating layer 4 on the surface of the polydimethylsiloxane gel, namely sequentially forming the polydimethylsiloxane gel and the self-lubricating layer 4 on the matching surface of the first artificial prosthesis 1 and the matching surface of the second artificial prosthesis 2 respectively, so that the artificial joint with the self-lubricating layer is prepared.
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, and 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 (3) pouring second silicone oil with the viscosity of 5-100cps into the needle tube, and then penetrating the needle tube into the high polymer material layer 3 of the artificial joint after disinfection, namely, the polydimethylsiloxane gel, wherein the injected second silicone oil can be stored in the molecular gaps of the polydimethylsiloxane gel, and 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 leak out, and a self-lubricating layer 4 can be formed on the surface of the polydimethylsiloxane gel again, so that the purposes of supplementing and repairing are achieved.
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 invention using other polymer material layers, for example, other polymer silicone gel, and hydrogel such as acrylamide hydrogel, polyvinyl alcohol hydrogel or cellulose hydrogel, the corresponding liquid polymer material can be obtained by using the preparation method disclosed in the prior art. When the polymer material layer is hydrogel, a large amount of deionized water is stored in the molecular gaps during preparation, so that the polymer material layer can be automatically oozed without soaking the polymer material layer, and a self-lubricating layer is formed on the surface of the hydrogel.
The foregoing description is only for the purpose of illustrating the technical solution of the present invention, and it is not intended to limit the technical solution of the present invention, and it is possible for those skilled in the art to modify the specific technical solution described in the foregoing embodiments or to make equivalent substitutions for some technical features thereof, without departing from the spirit of the corresponding technical solution from the scope of the technical solution protected by the present invention.

Claims (11)

1. A drag reducing structure having a self-lubricating layer comprising a substrate, characterized in that:
the upper surface of the substrate is provided with a micro-nano coarse structure, and a groove structure is etched on the upper surface of the substrate provided with the micro-nano coarse structure;
the upper surface of the substrate and the surface of the groove structure are provided with integrated polymer material layers, and the polymer material layers on the upper surface of the substrate extend into the micro-nano rough structure; the high polymer material layer comprises a first lubricating liquid and a high polymer material, wherein a second lubricating liquid is stored in a molecular gap of the high polymer material layer, and the second lubricating liquid continuously seeps out on the surface of the high polymer material layer to form a self-lubricating layer;
the high 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, a step of;
the second lubricating liquid is second silicone oil with the viscosity in the range of 5-100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
2. The drag reducing structure with self-lubricating layer as defined in claim 1, wherein:
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.
3. A method for producing a drag reducing structure having a self-lubricating layer as defined in claim 1 or 2, comprising the steps of:
preparing a micro-nano rough structure and a groove structure on the upper surface of a substrate;
mixing the first lubricating liquid with the 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 coarse structure and the groove structure, so that the liquid polymer material is uniformly adhered on the surface of the substrate, the micro-nano coarse structure and the surface of the groove structure;
solidifying the liquid high polymer material to form a high polymer material layer on the surface of the substrate;
putting the substrate with the high polymer material layer formed on the surface into a second lubricating liquid for soaking, so that the second lubricating liquid is adsorbed in the molecular gaps of the high polymer material layer;
and 6, after the lubricating oil is taken out, the second lubricating liquid seeps out from the molecular gaps of the high polymer material layer, and a self-lubricating layer is formed on the surface of the high polymer material layer, so that the drag reduction structure with the self-lubricating layer is obtained.
4. A method of producing a drag reducing structure having a self-lubricating layer as defined in claim 3, wherein:
in the step 1, the micro-nano rough structure and the groove structure are prepared on the upper surface of the substrate specifically as follows:
1.1, ablating the surface of a metal substrate by using laser with the energy of 100-3000 mu J to form a micro-nano porous structure;
1.2, etching a plurality of grooves with the width and 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 grooves which are distributed in a diamond shape with the width and the depth of a submillimeter level 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 the groove structure imitating the shark skin.
5. The method for producing a drag reducing structure having a self-lubricating layer according to claim 4, wherein:
the high polymer material layer is polydimethylsiloxane gel;
the step 2 is specifically as follows:
mixing a first silicone oil having a viscosity in the range of 100 to 500cps with polydimethylsiloxane (0.1 to 1.5): 1, mixing the components in a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
The step 5 is specifically as follows:
soaking the substrate with the surface formed with the polydimethylsiloxane gel in second silicone oil with the viscosity ranging from 5 cps to 100cps so that the second silicone oil is adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is smaller than that of the first silicone oil;
the step 6 is specifically as follows:
and taking out and drying, wherein the second silicone oil seeps out from the molecular gaps of the polydimethylsiloxane gel, 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.
6. The method for producing a drag reducing structure having a self-lubricating layer according to claim 5, wherein:
in step 2), a first silicone oil having a viscosity in the range of 100 to 500cps is mixed with polydimethylsiloxane (0.1 to 1.5): the mixing of the volume ratio 1 is specifically as follows:
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.
7. An artificial joint with a self-lubricating layer, comprising a first artificial prosthesis (1) and a second artificial prosthesis (2) which are matched, characterized in that:
the matching surface of the first artificial prosthesis (1) and/or the matching surface of the second artificial prosthesis (2) is provided with a high polymer material layer (3);
the high polymer material layer (3) comprises a first lubricating liquid and a high polymer material, wherein a second lubricating liquid is stored in a molecular gap of the high polymer material layer (3), and the second lubricating liquid seeps out to form a self-lubricating layer (4) on the surface of the high polymer material layer (3);
the high 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, a step of;
the second lubricating liquid is second silicone oil with the viscosity in the range of 5-100cps, and the viscosity of the second silicone oil is smaller than that of the first silicone oil.
8. An artificial joint with a self-lubricating layer according to claim 7, wherein:
the high polymer material layer (3) is doped with an anti-infective drug.
9. An artificial joint with a self-lubricating layer according to claim 8, wherein:
The device also comprises a backing plate which is arranged between the first artificial prosthesis (1) and the second artificial prosthesis (2) and is matched with the first artificial prosthesis (1) and the second artificial prosthesis (2);
the matching surfaces of the first artificial prosthesis (1) and/or the second artificial prosthesis (2) and the backing plate are provided with a high polymer material layer (3), and a self-lubricating layer (4) is formed on the surface of the high polymer material layer (3).
10. A method for preparing an artificial joint with a self-lubricating layer, which is used for preparing the artificial joint with the self-lubricating layer according to any one of claims 7 to 9, and is characterized in that:
mixing the first lubricating liquid with a high polymer material to obtain a liquid high polymer material;
2, coating liquid polymer materials on the contact surface of the first artificial prosthesis (1) and/or the second artificial prosthesis (2);
solidifying the liquid polymer material, and forming a polymer material layer (3) on the surface of the first artificial prosthesis (1) and/or the second artificial prosthesis (2);
the first artificial prosthesis (1) and/or the second artificial prosthesis (2) with the surface provided with the high polymer material layer (3) are/is placed into a second lubricating liquid for soaking, so that the second lubricating liquid is adsorbed in the molecular gaps of the high polymer material layer (3);
and 5, after the artificial joint is taken out, the second lubricating liquid seeps out from the molecular gaps of the high polymer material layer (3), and a self-lubricating layer (4) is formed on the surface of the high polymer material layer (3), so that the artificial joint with the self-lubricating layer is obtained.
11. The method for preparing an artificial joint with a self-lubricating layer according to claim 10, wherein:
the high polymer material layer (3) is polydimethylsiloxane gel;
the step 1 is specifically as follows:
mixing a first silicone oil having a viscosity in the range of 100 to 500cps with polydimethylsiloxane (0.1 to 1.5): 1, mixing the components in a volume ratio, and uniformly stirring to obtain a polydimethylsiloxane mixed solution;
the step 4 is specifically as follows:
immersing the artificial joint with the prepared polydimethylsiloxane gel attached to the surface in second silicone oil with the viscosity ranging from 5 cps to 100cps so that the second silicone oil is adsorbed in the molecular gaps of the polydimethylsiloxane gel; the viscosity of the second silicone oil is smaller than that of the first silicone oil;
the step 5 is specifically as follows:
and taking out and drying, wherein the second silicone oil seeps out from the molecular gaps of the polydimethylsiloxane gel, and a self-lubricating layer (4) is formed on the surface of the polydimethylsiloxane gel, so that the artificial joint with the self-lubricating layer is obtained.
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Oil-Infused superhydrophobic silicone material for low ice adhesion with long-term infusion stability;Yong Han Yeong;ACS Applied Materials & Interfaces;第8卷(第46期);32050-32059 *
PDMS表面微槽结构对摩擦副摩擦性能影响的研究;丁军鹏;中国优秀硕士学位论文全文数据库;A004-4 *
表面图案化或自修复润滑性PDMS防覆冰涂层的研究;彭杰;中国优秀硕士学位论文全文数据库;B020-13 *

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