Disclosure of Invention
In order to solve the technical problems in the background art, the invention aims to provide a coating material for medical instruments with ultra-smooth surfaces and antibacterial properties. The invention utilizes the lubricating liquid or the lubricating liquid to fill the lubricating layer of the ferroelectric material, the oleogel, the hydrogel, the silica gel and the solar cell to reduce the friction between the surface of the medical appliance and the vessel wall, improve the biocompatibility of the medical appliance and reduce the adhesion of bacteria on the surface of the medical appliance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in one aspect, the invention provides a lubricious coating for a surface of a medical device, comprising a lubricious coating disposed directly on the surface of the medical device, a base layer disposed on the surface of the medical device, and a lubricious coating disposed on the surface of the base layer;
the base layer is selected from a ferroelectric material base layer, an oil gel base layer, a hydrogel base layer, a silica gel base layer or a solar cell base layer;
the lubricating layer is formed by directly filling lubricating liquid on the surface of the medical instrument or the surface of the base layer.
Further, the ferroelectric material base layer is selected from a coating formed by at least one base layer material of a ferroelectric polymer and an inorganic ferroelectric material.
Further, the ferroelectric polymer is selected from one or more of polyvinylidene fluoride and its copolymer, polytetrafluoroethylene, nylon with odd number of carbon atoms, polyacrylonitrile, polyimide, polyvinylidene cyanide, polyurea, polyphenyl cyano ether, polyvinyl chloride, polyvinyl acetate or polypropylene. More preferably, the polyvinylidene fluoride copolymer is selected from polyvinylidene fluoride-trifluoroethylene copolymer, polyvinylidene fluoride-tetrafluoroethylene copolymer, polyvinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene copolymer and polyvinylidene fluoride-trifluoroethylene-chlorofluoroethylene copolymer.
Further, the inorganic ferroelectric material is selected from one or more of a bismuth layered perovskite structure ferroelectric, a tungsten bronze type ferroelectric, and a perovskite type organic metal halide ferroelectric. Preferably, the inorganic ferroelectric material includes one or more of lead titanate, barium titanate, potassium niobate, lithium tantalate, bismuth titanate, bismuth ferrite, potassium dihydrogen phosphate, ammonium triglycinate sulfate, and a rosette salt.
Further, the particle size of the inorganic ferroelectric material is 1nm to 100 μm, for example, 1nm, 10nm, 50nm, 100nm, 500nm, 1 μm, 10 μm or 100 μm.
Further, the ferroelectric material base layer is a base layer material formed by mixing a ferroelectric polymer and an inorganic ferroelectric material.
Further, the oil gel base layer is a coating formed by at least one base material selected from poly (n-butyl methacrylate), polyethylene glycol dimethacrylate, poly (lauryl methacrylate), poly (octadecyl methacrylate), sodium polystyrene sulfonate and polyethylene dioxythiophene.
Further, the hydrogel base layer is selected from one or more of fibrin, cellulose, chitosan, sodium alginate, hyaluronic acid, polyether urethane, polyurethane, elastin, gelatin, agar, starch, cellulose, carrageenan, carboxymethyl cellulose, carboxymethyl chitin, polyhydroxyethyl methacrylate, methacrylic anhydrified gelatin, polymethacrylic acid, polyacrylic acid, polyisopropylacrylamide, polylysine, poly-L-glutamic acid, polyaspartic acid, polyvinyl alcohol, polyethylene glycol diacrylate, polyvinylpyrrolidone, polylactic acid, polyacrylamide, polymaleic anhydride and derivatives thereof
Further, the silica gel base layer is a coating layer formed by at least one base material selected from polydimethylsiloxane, silicon rubber, silicon resin, silicon oil, a silane coupling agent, vulcanized silicon rubber, methyl vulcanized silicon rubber, vulcanized nitrile silicon rubber and vulcanized fluorosilicone rubber.
Further, the solar cell base layer is selected from a coating layer formed by using a material for preparing a solar cell light absorption layer as a base material. Preferably, the material for preparing the light absorption layer of the solar cell is selected from monocrystalline silicon, polycrystalline silicon, amorphous silicon, copper indium selenide, gallium arsenide and nano TiO2Crystal, poly (methoxy ethyl hexyloxy) phenylethene, poly (methoxy dimethyl octyloxy) p-phenylethene, poly (hexyl thiophene fullerene), TiO2A base dye-sensitized material.
Further, the base layer is a mixed solution of a base material prepared from a base material and a solvent, the mixed solution is coated on the surface of the medical instrument through spraying, dip coating, drop coating, spin coating or printing, and the solvent is removed to form the base layer.
Further, the method also comprises the step of carrying out high-voltage corona polarization on the ferroelectric material base layer and the solar cell base layer material after the solvent is removed.
Further, the voltage for corona polarization at high voltage is 10kV or more, preferably 20kV or more.
Further, the solvent is water and an organic solvent, and the organic solvent is preferably selected from one or more of dimethyl sulfoxide, N-dimethylformamide acetone, trimethyl phosphate, N-dimethylformamide, N-dimethylacetamide, propylene glycol, ethylene glycol, ethanol, N-methylpyrrolidone, tetrahydrofuran, tetramethylurea, hexamethylphosphoric acid amide, and hexafluoroisopropanol.
Further, the mass concentration of the base material in the base material mixed solution is 1-50%. Preferably 1% to 20%. E.g., 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%.
Further, the medical devices are instruments, devices, instruments and materials that are directly used for the subject. Preferably, some or all of the components of the medical device are disposed within or enter the subject upon application. The medical apparatus is a medical apparatus for detection and a medical apparatus for treatment, such as an implantation medical apparatus. Such as contact lenses, catheters for implants, stents, artificial joints, staples for orthopedics, catheters, intravaginal or digestive tract instruments (stomach tubes, sigmoidoscopes, colonoscopes, gastroscopes), endotracheal tubes, bronchoscopes, dentures, orthodontic appliances, intrauterine devices, burn tissue dressings, oral dressings, therapeutic instruments, laparoscopes, arthroscopes, dental filling materials, artificial muscle keys, artificial throats, and sub-periosteal implants.
Further, the medical device is made of gold, silver, platinum, palladium, aluminum, copper, steel, tantalum, magnesium, nickel, chromium, iron, nickel-titanium alloy, cobalt-chromium alloy, high nitrogen nickel-free stainless steel, cobalt-chromium-molybdenum alloy, gallium arsenide, titanium, hydroxyapatite, tricalcium phosphate, polylactic acid, carbon fiber, polyglycolic acid, polylactic acid-glycolic acid copolymer, poly epsilon- (caprolactone), polyanhydride, polyorthoester, polyvinyl alcohol, polyethylene glycol, polyurethane, polyacrylic acid, poly (N-isopropylacrylamide), poly (ethylene oxide) -poly (propylene oxide) -poly (ethylene oxide), polytetrafluoroethylene, polycarbonate, polyurethane, nitrocellulose, polystyrene, polyethylene terephthalate, polydimethylsiloxane, polyacrylonitrile-butadiene-styrene, polyetheretherketone, silicon oxide, polyethylene glycol terephthalate, polyacrylonitrile-butadiene-styrene, polyetheretherketone, silicon oxide, or mixtures thereof, At least one material of titanium oxide, aluminum oxide, zirconium oxide, niobium oxide, organic silicon, silicon rubber and glass.
Further, the static contact angle of water of the surface with the lubricious coating for the surface of the medical device is 50 ° -110 °, for example 80 ° -110 °, 70 °, 75 °, 80 °, 85 °, 90 °, 95 °, 100 °, 105 °; the dynamic contact angle to water is 0 to 10, for example 1 to 5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
Further, the lubricating fluid infusion comprises soaking with at least one of vegetable oil, glycol, perfluoropolyether, mineral oil, glycerol, paraffin, polyurethane, acrylic polyurethane, silicone oil, fluorine oil, vegetable seed oil, n-decanol, motor oil, kerosene, oleic acid, methyl oleate, ethyl oleate, ferrofluid, thermotropic liquid crystal, ionic liquid, iodoacetic acid, mannitol, eicosapentaenoic acid, algin, alginic acid, mucopolysaccharide, hyaluronic acid, collagen, elastin, allantoin, glucuronic acid, glycolic acid, collagen, mushroom fluid, and emodin.
Further, the lubricating layer has a thickness of 1nm to 1000. mu.m, for example, 10nm, 20nm, 30nm, 50nm, 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1 μm, 5 μm, 10 μm, 20 μm, 30 μm, 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm.
Further, the base layer has a thickness of 100nm to 1mm, preferably 100nm to 100 μm, for example, 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1 μm, 5 μm, 10 μm, 20 μm, 30 μm, 50 μm, 100 μm.
In another aspect, the present invention provides a method for preparing the lubricating coating for the surface of the medical device, the method comprising the steps of:
the first scheme is as follows:
a lubricating layer directly provided on the surface of the medical device: and (4) pouring a lubricating liquid on the surface of the medical instrument to form a lubricating layer.
Scheme II:
1) arranging a base layer on the surface of the medical appliance: preparing a base material into a base material mixed solution, coating the base material mixed solution on the surface of a medical instrument by spraying, dip coating, drop coating, spin coating or printing, and removing a solvent to form a base layer;
2) the lubricating layer arranged on the surface of the base layer: and (4) pouring a lubricating liquid on the surface of the base layer to form a lubricating layer.
Further, in the step 1) of the second scheme, after the solvent is removed, the method further comprises the step of performing high-voltage corona polarization on the ferroelectric material base layer and the solar cell base layer material.
In still another aspect, a medical device having lubricating and antibacterial properties is provided, wherein the surface of the medical device is provided with the lubricating coating for the surface of the medical device, or the medical device is provided with the lubricating coating for the surface of the medical device by the preparation method.
Further, the static contact angle of water of the surface of the medical device having a lubricious coating is 50 ° -110 °, for example 80 ° -110 °, 70 °, 75 °, 80 °, 85 °, 90 °, 95 °, 100 °, 105 °; the dynamic contact angle to water is 0 to 10, for example 1 to 5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
Further, the potential of the surface of the medical device having the lubricating coating is 1 to 50V.
Further, in the medical device, a part which enters the body of the subject in use has the above lubricating coating for the surface of the medical device, or the surface of the part which enters the body of the subject in use of the medical device is provided with the lubricating coating for the surface of the medical device by the above manufacturing method.
In a further aspect, there is provided the use of a lubricious coating for a surface of a medical device as described above, or a lubricious coating obtained by a process as described above, to inhibit bacterial adhesion.
In a further aspect, there is provided the use of a lubricious coating for a surface of a medical device as described above, or a lubricious coating obtained by a process as described above, in the preparation of a medical device for inhibiting bacterial adhesion.
In still another aspect, there is provided a method for improving the lubricity of the surface of a medical instrument while improving the antibacterial ability of the surface of the medical instrument, which comprises providing the above lubricating coating for the surface of the medical instrument on the portion of the medical instrument which enters the body of a subject when the medical instrument is in use, or providing the lubricating coating for the surface of the medical instrument on the surface of the portion of the medical instrument which enters the body of the subject when the medical instrument is in use by the above preparation method.
In yet another aspect, a coating composition for a medical device surface is provided, the composition comprising a separately disposed base material, and a lubricating oil.
Further, the coating composition also comprises a solvent.
In a further aspect, there is provided the use of the above coating composition for the surface of a medical device for the manufacture of a medical device for inhibiting bacterial adhesion.
The invention has the beneficial effects that:
(1) the invention utilizes the lubricating liquid to fill the medical appliance or the lubricating liquid to fill the lubricating layer of the ferroelectric material, the oleogel, the hydrogel, the silica gel and the solar cell, reduces the friction between the surface of the medical appliance and the vessel wall, improves the biocompatibility of the medical appliance and reduces the adhesion of bacteria on the surface of the medical appliance.
(2) The coating material for the medical instruments with the ultra-smooth surfaces and the antibacterial effects has the advantages of simple preparation process, lasting lubricating effect and stable antibacterial effect.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples, but the present invention is not limited to the following examples.
Example 1
The catheter made of silica gel is sample 1, and then silicone oil is poured on the surface of the catheter made of silica gel to obtain sample 2.
The static contact angle of the sample 2 on the surface of the silica gel catheter after the treatment to water is 87 degrees, and the dynamic contact angle to water is 3 degrees, so that the adhesion of bacteria on the surface of the silica gel catheter can be prevented.
Bacteriostatic experiments were performed on the catheter of example 1 (sample 1) whose surface was not coated with silicone oil and the catheter of example 2 whose surface was coated with silicone oil.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 2 percent, and the bacteriostasis rate of the sample 2 is 83 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 2
Dissolving 10% of polyvinylidene fluoride in dimethyl sulfoxide, coating 5mL of polyvinylidene fluoride solution on the surface of a clean gastroscope made of polyether-ether-ketone by a dripping coating method, drying at 80 ℃ for 12h, and then performing corona polarization at 26kV to obtain a sample 1. And then silicone oil is infused on the polarized surface of the gastroscope coated with the polyvinylidene fluoride coating to obtain a sample 2.
The treated surface sample 2 of the gastroscope has a static contact angle of 87 degrees to water and a dynamic contact angle of 3 degrees to water, so that bacteria can be prevented from being adhered to the surface of the laparoscope, and the treated surface of the laparoscope has a surface potential, so that the adhesion of the bacteria can be further inhibited.
The bacteriostatic experiment was performed on the gastroscope (sample 1) in which the surface of example 2 was not coated with the silicone oil-infused polyvinylidene fluoride coating and the gastroscope (sample 2) in which the surface was coated with the silicone oil-infused polyvinylidene fluoride coating, respectively.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 1 percent, and the bacteriostasis rate of the sample 2 is 85 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 3
10% of polylauryl methacrylate by mass is dissolved in ethylene glycol, 5mL of polylauryl methacrylate solution is coated on the surface of a clean colonoscope made of nickel-titanium alloy by a spin coating method, and the colonoscope is dried for 12h at 70 ℃ to obtain a sample 1. And then paraffin perfusion is carried out on the surface of the colonoscope coated with the polylauryl methacrylate coating to obtain a sample 2.
The treated colonoscope surface sample 2 has a static contact angle of 106 degrees to water and a dynamic contact angle of 5 degrees to water, and can prevent bacteria from adhering to the surface of the colonoscope.
The bacteriostatic experiments were performed on the colonoscope of example 3 (sample 1) whose surface was not coated with paraffin-infused polylauryl methacrylate coating and the colonoscope (sample 2) whose surface was coated with paraffin-infused polylauryl methacrylate coating, respectively.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 3 percent, and the bacteriostasis rate of the sample 2 is 80 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 4
Dissolving 4% of sodium alginate by mass in water, coating 5mL of sodium alginate solution on the surface of a clean colonoscope made of zirconia by a spraying method, and drying at 70 ℃ for 12h to obtain a sample 1. And then mannitol infusion is performed on the surface of the colonoscope coated with the sodium alginate coating to obtain a sample 2.
The treated colonoscope surface sample 2 has a static contact angle of 106 degrees to water and a dynamic contact angle of 5 degrees to water, and can prevent bacteria from adhering to the surface of the colonoscope.
The bacteriostatic experiments were performed on the colonoscope of example 4 (sample 1) whose surface was not coated with the mannitol perfusion sodium alginate coating and the colonoscope (sample 2) whose surface was coated with the mannitol perfusion sodium alginate coating, respectively.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 3 percent, and the bacteriostasis rate of the sample 2 is 80 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 5
Dissolving 10% by mass of polyimide in N, N-dimethylformamide, coating 5ml of polyimide solution on the surface of a clean laparoscope made of tricalcium phosphate by a dip coating method, drying at 80 ℃ for 12 hours, and then performing corona polarization at 26kV high voltage to obtain a sample 1. Alginic acid perfusion is performed on the surface of the polarized laparoscope coated with the polyimide coating to obtain a sample 2.
The treated surface sample 2 of the laparoscope has a static contact angle of 103 degrees to water and a dynamic contact angle of 2 degrees to water, so that bacteria can be prevented from being adhered to the surface of the laparoscope, and the treated surface of the laparoscope also has a surface potential, so that the adhesion of the bacteria can be further inhibited.
The bacteriostatic experiment was performed on the laparoscope (sample 1) of example 5, which was not coated with the alginic acid impregnated polyimide coating, and the laparoscope, which was coated with the alginic acid impregnated polyimide coating.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 3 percent, and the bacteriostasis rate of the sample 2 is 86 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 6
Dissolving 10% of polydimethylsiloxane by mass in tetrahydrofuran, coating 5mL of polydimethylsiloxane solution on the surface of a clean gastroscope made of polylactic acid by a printing method, and drying at 80 ℃ for 12h to obtain a sample 1. Allantoin perfusion was then performed on the gastroscope surface coated with the polydimethylsiloxane coating to obtain sample 2.
The treated gastroscope surface sample 2 has a static contact angle of 93 degrees and a dynamic contact angle of 3 degrees on water, and can prevent bacteria from adhering to the surface of the gastroscope.
The bacteriostatic test was performed on the gastroscope (sample 1) of example 6, which was not coated with the allantoin-infused polydimethylsiloxane coating, and the gastroscope (sample 2), which was coated with the allantoin-infused polydimethylsiloxane coating.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 2 percent, and the bacteriostasis rate of the sample 2 is 88 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 7
Dissolving 3% polyhexylthiophene fullerene in dimethyl sulfoxide, coating 5mL of polyhexylthiophene fullerene solution on the surface of a clean artificial muscle bond made of titanium by a spraying method, and drying at 80 ℃ for 12h to obtain a sample 1. And then mineral oil perfusion is carried out on the surface of the artificial tendon coated with the polyhexamethylene thiophene fullerene coating to obtain a sample 2.
The treated sample 2 on the surface of the artificial muscle bond has a static contact angle of 95 degrees and a dynamic contact angle of 4 degrees for water, and can prevent bacteria from adhering to the surface of the artificial muscle bond.
The bacteriostatic experiment was performed on the artificial muscle bond (sample 1) of example 7, the surface of which was not coated with the mineral oil-infused polyhexylthiophene fullerene coating, and the artificial muscle bond (sample 2) of which the surface was coated with the mineral oil-infused polyhexylthiophene fullerene coating, respectively.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 2 percent, and the bacteriostasis rate of the sample 2 is 83 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 8
Ultrasonically dispersing 1% by mass of 100nm lithium tantalite particles in dimethyl sulfoxide, dissolving 10% by mass of polyacrylonitrile in the dispersion liquid, coating 5mL of the mixed liquid on the surface of a clean colonoscope made of polyether-ether-ketone by a dripping method, drying for 12h at 80 ℃, and then performing corona polarization at 26kV to obtain a sample 1. And then performing emodin perfusion on the surface of the polarized colonoscope coated with the polyacrylonitrile composite coating to obtain a sample 2.
The treated colonoscope surface sample 1 has a static contact angle of 101 degrees to water and a dynamic contact angle of 2 degrees to water, so that bacteria can be prevented from adhering to the gastroscope surface, and the treated colonoscope surface has a surface potential to further inhibit the adhesion of the bacteria.
The bacteriostatic experiments were performed on the colonoscope (sample 1) of example 8, which was not coated with the emodin-infused polyacrylonitrile composite coating, and the colonoscope (sample 2) which was coated with the emodin-infused polyacrylonitrile composite coating.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 2 percent, and the bacteriostasis rate of the sample 2 is 90 percent. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Example 9
Ultrasonically dispersing 150nm monopotassium phosphate particles with the mass percent of 1% in dimethyl sulfoxide, dissolving polyurea with the mass percent of 10% in the dispersion liquid, coating 5ml of mixed liquid on the surface of a clean artificial muscle bond made of polylactic acid by a spraying method, drying for 12 hours at 80 ℃, and then performing corona polarization at 26kV to obtain a sample 1. And then carrying out hyaluronic acid perfusion on the surface of the artificial muscle bond coated with the polarized polyurea composite coating to obtain a sample 2.
The static contact angle of the treated artificial muscle bond surface sample 2 to water is 103 degrees, the dynamic contact angle to water is 3 degrees, bacteria can be prevented from being adhered to the artificial muscle bond surface, and the treated artificial muscle bond surface also has surface potential, so that the adhesion of the bacteria can be further inhibited.
The bacteriostatic test was performed on the artificial muscle bond (sample 1) of example 9, the surface of which was not coated with the hyaluronic acid perfusion polyurea composite coating, and the artificial muscle bond (sample 2) of which the surface was coated with the hyaluronic acid perfusion polyurea composite coating, respectively.
The antibacterial experiment method comprises the following steps: coli (E.coli) was inoculated into 10mL Tryptone Soy Broth (TSB) in a Erlenmeyer flask, cultured in a constant temperature shaker for 12h (37 ℃ C. with a shaking rate of 200r/min), and then diluted to 1X 10 by Mach turbidimetry6CFU/mL of bacterial suspension. Samples 1 and 2, which were 10X 10mm in size, were placed in 12-well plates, and 1mL of the bacterial TSB suspension obtained above was added thereto, respectively, and cultured in an incubator at 37 ℃ for 48 hours. After incubation, the samples were gently washed with 0.9% NaCl solution to the surface of the coating, transferred to a new 12-well plate, and then cultured for 15min with 1mL of TSB medium and an appropriate amount of SYTO 9/PI stain.
The sample is placed in 10mL of 0.9% NaCl solution for ultrasonic cleaning for 10min (200W, 40kHz), bacteria adhered to the surface of the sample are promoted to be dispersed in the NaCl solution, then 100 mu L of the sample is used for observing the growth condition of the bacteria by a plating method, and the experimental results are repeated at least 3 times.
The bacteriostasis rate of the sample 1 is 3 percent, and the bacteriostasis rate of the sample 2 is 88 percent. Wherein the bacteriostasis rate is (diameter of control colony-diameter of treated colony)/(diameter of control colony-diameter of bacterial cake) multiplied by 100%. Wherein the control group is the result of bacteriostatic experiment carried out on the gastroscope without any coating on the surface. The treatment group is the result of bacteriostatic experiment carried out on the sample 1 or 2.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.