603 results about "Hydrophilic coating" patented technology

To provide a basin area member which has high hydrophilic nature, matte appearance and can suppress slipperiness.SOLUTION: A basin area member comprises: a substrate; and a coating layer covering the substrate. The coating layer has: a ground layer provided on a surface of the substrate; and a surface layer provided on a part of a surface of the ground layer. The coating layer has: a first area where the ground layer is covered with the surface layer; and a second area where the ground layer is not covered with the surface layer. The surface layer includes: a coating film formed of a cured object of a hydrophilic coating in the first area; and an aggregate formed by aggregation of multiple particles in the coating film. The aggregate has parts where two or more particles overlap in a lamination direction. A ratio of an area of the second area to a total of areas of the first area and second area in viewing along the lamination direction is 1.6% or more and 50% or less in the basin area member.SELECTED DRAWING: Figure 3

The invention discloses an efficient heat exchange structure of energy-saving refrigeration equipment, and relates to the technical field of heat exchangers. Comprising a heat exchanger body, the heat exchanger body comprises a heat exchanger support, and a plurality of heat exchange pipes are arranged in the heat exchanger support; and a plurality of heat exchange fins are arranged on the heat exchange tube. Through the design of the gradient-thickness heat exchange fins and the synergistic effect of the gradient-thickness heat exchange fins and the super-hydrophobic coating and the high-temperature heat insulation coating, random nucleation of condensate water is restrained, condensate water is preferentially formed by the condensation collection grooves in the outer edges of the heat exchange fins due to low heat resistance and fast heat dissipation, and the heat dissipation efficiency is improved by combining the annular condensation collection grooves and millimeter-level flow guide burrs. The guide plate and the Y-shaped guide rib I are combined, a hydrophilic coating II is used for adsorbing water flow, a hydrophobic coating II is matched for blocking airflow interference, and the condensate water is ensured to quickly flow into a bottom condensate water collecting box along a preset path; and the influence of the condensate water on the heat exchange tube is avoided.

The invention relates to the technical field of medical instruments, and discloses a composite micro guide wire and a manufacturing method thereof.The inner core body of the micro guide wire is formed by stainless steel (or novel stainless steel)-nickel titanium in a composite mode, and an inner core comprises a conveying section (supporting section), a transition section (transition section) and a head end soft section which are arranged in sequence; a platinum core nickel-titanium alloy wire is tightly wound on the head end soft section, the inner core and the outer layer of the platinum core nickel-titanium alloy wire are integrally wrapped by TPU, the surface of the near section of the TPU layer is coated with a hydrophobic coating, and the surface of the far section of the TPU layer is coated with a hydrophilic coating. The micro guide wire is manufactured through the following steps of material preparation, inner core positioning, contact part compounding, platinum core nickel-titanium alloy wire winding and fixing, TPU coating and coating. The surface of the micro guide wire is smooth, the performance of the transition section is good, the head end is soft, the soft section of the head end is tightly wound by the platinum core nickel-titanium alloy wire, and an ideal developing effect is achieved.

The invention provides a medical hydrophilic coating and a preparation method and application thereof.The coating comprises a substrate layer and a functional layer, the substrate layer is arranged on the surface of a medical base material, the functional layer is arranged on the surface of the side, away from the medical base material, of the substrate layer, and the substrate layer comprises a substrate modification material containing a first reactive functional group; the functional layer comprises a phosphorylcholine compound containing a second reactive functional group; the substrate layer and the functional layer are connected through a chemical bond formed by the first reactive functional group and the second reactive functional group; the substrate modification material contains a third reactive functional group, and the substrate layer is connected with the medical base material through a chemical bond formed by the third reactive functional group and hydroxyl or amino on the surface of the medical base material; when the first reactive functional group is an azide group, the second reactive functional group is an alkynyl group; or when the first reactive functional group is the alkynyl group, the second reactive functional group is the azide group. Chemical bonds are formed through azido and alkynyl, multiple chemical reactions are not needed, and the uniformity of the coating is improved.

The invention discloses a preparation method of a 32P-loaded ultrathin flaky chitosan hydrogel applicator. The preparation method comprises the following steps: (1) preparing a chitosan aqueous solution; (2) dropwise adding methacrylic anhydride into the chitosan aqueous solution for reaction to obtain methylacryloylated chitosan; (3) preparing a methylacryloyl chitosan aqueous solution; (4) adding 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone into the methylacryloylated chitosan aqueous solution to obtain a chitosan hydrogel precursor solution, and (5) coating the inner wall of a mold made of a polytetrafluoroethylene material with a super-hydrophilic coating; (6) adding the Na2H32PO4 aqueous solution and the chitosan hydrogel precursor solution into a mold, stirring, and carrying out illumination curing; and (7) taking out the cured hydrogel and packaging the hydrogel between two layers of transparent adhesive tapes. According to the application, the ultrathin hydrogel applicator can be prepared, so that the blocking of the hydrogel material to rays is reduced, and the curative effect of the applicator is enhanced.

The utility model relates to coating equipment, and discloses hydrophilic coating coating equipment for medical catheters, which comprises a dip-coating module, a lifting module and a curing module, the dip-coating module comprises a moving frame and a horizontal driving device, a solution tube is mounted on the moving frame, the horizontal driving device is in driving connection with the moving frame, and the lifting module is connected with the curing module. The lifting module comprises a lifting driving device, a rotating assembly and a mounting frame, the mounting frame is used for mounting a medical catheter and connected with the lifting driving device, the rotating assembly is used for driving the medical catheter to rotate, the mounting frame is located above the dip-coating module, the curing module comprises an ultraviolet lamp set, and the ultraviolet lamp set is located on the side face of the lifting module. According to the utility model, the hydrophilic coating can be efficiently and uniformly formed on the medical catheter.

The invention belongs to the field of functional textile materials, and provides a one-way moisture-conducting breathable fabric based on a vinyl elastomer and a preparation method of the one-way moisture-conducting breathable fabric based on the vinyl elastomer. The hydrophilic coating contains a vinyl elastomer matrix, polyvinyl alcohol, a zwitterionic polymer and a cross-linking agent, the hydrophobic coating contains a vinyl elastomer matrix, vinyl-terminated polydimethylsiloxane, polyhedral oligomeric silsesquioxane and other components, the coatings are only attached to the surfaces of yarn fibers and do not block pores, and a wettability gradient structure is formed; the excellent performance that the static contact angle gradient in the thickness direction is larger than or equal to 50 degrees, the capillary water absorption height from the inner side to the outer side is larger than or equal to 3.0 cm / 10 min, the capillary water absorption height from the outer side to the inner side is smaller than or equal to 1.0 cm / 10 min, the moisture permeation amount is larger than or equal to 5000 g.m.24 h, and the air permeability after curing is 65% or above of a fabric base material is achieved, the technical problem that an existing fabric is insufficient in moisture conductivity and air permeability is solved, and wide application value is achieved.

This invention belongs to the field of membrane material preparation and modification technology, and relates to a method for pre-wetting the surface of a hydrophobic ceramic membrane. The ceramic membrane is immersed in a cyclohexane solution of perfluorooctyltrimethoxysilane for 3-4 hours. After immersion, the ceramic membrane is dried in an oven. An ethanol solution is forced to circulate through the ceramic membrane to pre-wet the separation layer. The pre-wetting process proposed in this invention is simple, highly controllable, and easily scaled up to pre-wet multi-channel hydrophobic ceramic membranes. This invention achieves coarse adjustment of the wetting degree by controlling the concentration of the ethanol-water solution, and further fine adjustment by combining the circulation time of the ethanol-water solution, thus achieving more precise control of the wetting degree and optimal improvement of the uniformity of the hydrophilic coating.

This disclosure describes single and multi-layer woven meshes designed to enable sucking flow condensation and capillary-driven liquid film boiling, respectively, for instance, in use in heat spreaders. In some instances, the single-layer woven meshes can include a nanostructure coating and a hydrophobic coating, while the multi-layer meshes can include a microcavity coating and optionally a hydrophilic coating.

The invention relates to the technical field of cabinet heat dissipation, and discloses a low-energy-consumption water-cooling radiator for a large-scale cabinet, and the radiator comprises a cabinet which serves as a basic component and is used for bearing and connecting a lower structure; the radiator is arranged in the cabinet and is used for radiating heat of the cabinet body; the low-resistance connecting structure is connected with the cabinet and the radiator; the integrated heat dissipation structure is attached to the heating surface of the cabinet; the combined type circulation pipeline comprises a liquid inlet pipe, a liquid outlet pipe and a multi-stage flow divider, and the multi-stage flow divider is connected with an external cooling liquid supply system; and the self-adaptive flow control valve dynamically adjusts the flow of the cooling liquid according to the internal temperature of the cabinet. The invention has the following beneficial effects: when a cooling liquid flows through, the divergent cross section of the main flow channel layer accelerates fluid diffusion and reduces thermal resistance of a boundary layer, the flow deflectors and the spiral turbulent flow fins cooperate to make the cooling liquid better contact with the nano hydrophilic coating, the nano hydrophilic coating reduces a liquid drop contact angle, the cooling liquid forms an ultrathin liquid film on the flow channel wall, and the heat resistance of the boundary layer is improved. And vaporization latent heat release is accelerated.

The present disclosure includes a catheter system including an inner catheter and an outer catheter configured to at least partially receive the inner catheter. Each of the inner catheter and the outer catheter may include an outer surface and an inner surface, where each of the outer surface and the inner surface may be coated with a hydrophilic coating. In some embodiments, the hydrophilic coating is configured to reduce the surface tension and increase the lubricity of the inner and outer catheters.

The invention discloses a reverse osmosis membrane based on tannic acid solution activation and hydrophilic compound surface modification and a preparation method thereof, and belongs to the technical field of composite reverse osmosis membrane preparation. The method comprises the following steps: after an interfacial polymerization reaction is finished, activating an RO membrane by adopting an aqueous solution containing tannic acid (TA); and meanwhile, a hydrophilic compound is selected to carry out surface modification on the activated RO membrane. The unique molecular structure of the TA can improve the surface structure of the RO membrane to improve the selective permeability of the membrane on one hand, and on the other hand, in the surface modification process, more anti-pollution groups can be fixed on the surface of the RO membrane in the presence of the TA, so that the anti-pollution performance of the RO membrane is improved, the activated RO membrane is subjected to surface modification by selecting a hydrophilic compound polyethylene glycol (PEG), and the anti-pollution performance of the RO membrane is improved. A smooth hydrophilic coating is added to the surface of the RO membrane through PEG modification, so that the selective permeability and the anti-pollution performance of the membrane are improved.

The invention discloses a washable waterproof moisture-permeable composite material, a preparation method thereof, a waterproof moisture-permeable fabric and clothes. The washable waterproof moisture-permeable composite material comprises a three-layer composite structure, the ceramic coating comprises first ceramic particles, the hydrophilic coating comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is larger than the maximum aperture of the microporous membrane, the particle size D50 of the second ceramic particles is smaller than 1000 nm, and the particle size D50 of the hydrophilic polymer is larger than the maximum aperture of the microporous membrane. The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10. The washable waterproof moisture-permeable composite material can be used for preparing a waterproof breathable fabric. According to the washable waterproof moisture-permeable composite material disclosed by the invention, the peel strength of the hydrophilic coating and the washable performance of the whole washable waterproof moisture-permeable composite material are effectively improved while good air permeability is maintained.

The present application relates to a coating composition, an anti-fogging product and a preparation method thereof. The coating composition comprises a low-melting glass powder and an inorganic nanomaterial in a mass ratio of 1: (1-5); wherein the melting temperature of the low-melting glass powder is less than or equal to 650°C. The coating composition uses the low-melting glass powder as a binder, melts and bonds the inorganic nanomaterial with a hydrophilic function at a high temperature to form an inorganic hydrophilic coating, which has improved mechanical properties such as hardness and scratch resistance compared to an organic hydrophilic coating. And it has little effect on the transmittance of the transparent substrate, so that the prepared anti-fogging coating can have both good mechanical properties and high transmittance.

A hydrophilic coating composition for bubble reduction or elimination in an interferometric system is provided. A portable interferometric system for detection, authentication and / or quantification of at least one analyte that includes the hydrophilic coating composition as well as related methods are also provided.

The present invention relates to the field of medical catheters, and discloses a medical catheter having a hydrophilic coating on the inner wall and a preparation method thereof. The present invention firstly applies a macromolecular ultraviolet light initiator solution and a catheter substrate solution to a core rod respectively to obtain a thin-walled catheter embryo. Then, the hydrophilic monomer polymerization is initiated in the catheter embryo to obtain a hydrophilic inner wall coating. Finally, the embryo is continuously dipped in the catheter substrate solution to obtain a medical catheter. In the preparation method, since the macromolecular light initiator can play an anchoring role in the catheter and the hydrophilic coating has a cross-linked network structure, the obtained hydrophilic coating has good stability. Mid-infrared light irradiation can quickly heat the material, prompting the effective initiation chain segment of the macromolecular light initiator to migrate to the surface, which can provide more grafting points, while increasing the polymerization rate and shortening the polymerization time. In addition, antibacterial and anticoagulant small molecules can also be added to the substrate solution to improve the antibacterial and anticoagulant properties of the catheter.

The invention discloses a kind of hydrophilic and hydrophobic integrated membrane material and preparation method thereof for desalination of seawater, a hydrophilic solution with a concentration of 0.1 10 mol / L is coated on one side of substrate to obtain a hydrophilic coating;a hydrophobic solution with a concentration of 0.1 10 mol / L is coated on the other side of substrate to obtain a hydrophobic coating;the substrate coated with the coating is placed in a plasma reactor, a carrier gas is passed through, and a power supply parameter is adjusted to trigger a discharge to obtain a desalination membrane material;the edge of the desalination membrane material is subsequently subjected to water isolation treatment. A kind of hydrophilic and hydrophobic integrated membrane material and preparation method thereof for desalination of seawater disclosed by the present invention, by coating on the surface of the material, plasma modification technology is then utilized to prepare a desalination membrane material driven by solar energy, integrating hydrophilic and hydrophobic characteristics in different sides, with antifouling property, efficient desalination can be carried out, and fresh water output is increased.

The guide catheter assembly comprises a catheter, a reinforcing tube and a catheter base, the reinforcing tube is arranged on the catheter in a sleeved mode, one end of the reinforcing tube and one end of the catheter both extend into the catheter base, the catheter comprises an outer layer, a middle layer, an inner layer and the hydrophilic coating, the middle layer is arranged on the outer layer, the inner layer is arranged on the middle layer, and the hydrophilic coating is arranged on the inner layer. The hydrophilic coating comprises a first hydrophilic coating and a second hydrophilic coating, and the outer layer, the middle layer and the inner layer are sandwiched between the first hydrophilic coating and the second hydrophilic coating. The surface and the outer surface of the inner cavity of the catheter body are coated with the hydrophilic coatings, and the hydrophilic coatings activated in the inner cavity of the catheter body can reduce the friction coefficient between an instrument and the inner cavity of the guide catheter, so that the friction force is reduced; the hydrophilic coating activated on the outer surface of the catheter body can reduce the friction coefficient between the outer surface of the guiding catheter and inner cavities of instruments such as blood vessels, guiding sheaths or vascular sheaths, and therefore friction force is reduced.

Porous ePTFE articles coated with a hydrophilic coating are provided. The coating may be modified by covalent modifications to the PVOH coating. Covalent modifications may include small molecule grafting, polymer grafting to or from the PVOH backbone, modifying the PVAc precursor of the PVOH, crosslinking of the polymer via thermal or photochemistry, crosslinking of the polymer with a multifunctional crosslinking agent, and the like, and combinations thereof.

The invention relates to a production method of a high-end filter aluminum foil for a coating, which comprises the following steps: (1) stirring and mixing polymethylene polyphenyl isocyanate, polyol, a polymerization inhibitor, a catalyst and water, and reacting to obtain a prepolymer; (2) mixing the prepolymer with polysorbate and cyclopentane to obtain a base coating; (3) the surface of the aluminum foil is coated with the base layer paint, and the aluminum foil coated with a base layer coating is obtained; (4) adding a surfactant into water, uniformly mixing, adding silicate, a boron compound and nano silicon dioxide, and uniformly stirring to obtain a hydrophilic coating; and (5) the surface of the base layer coating is coated with hydrophilic paint, and the coating aluminum foil is obtained. The base layer coating is of a porous structure, the roughness of the surface of the aluminum foil is improved, the hydrophilicity of the hydrophilic coating is improved to a certain extent through the roughness of the porous structure in the base layer coating, and the hydrophilic angle of the hydrophilic coating is reduced.

The invention discloses a zinc-bromine flow battery diaphragm with a bromine fixing effect, and a preparation method and application thereof, and relates to the field of zinc-bromine flow batteries. The zinc-bromine flow battery diaphragm comprises a porous diaphragm and a hydrophilic coating arranged on one side or two sides of the porous diaphragm, the hydrophilic coating is formed by coating an activated porous diaphragm with hydrophilic slurry, and the activation mode comprises any one of ozone treatment, plasma treatment or 60Co gamma-radiation treatment. According to the zinc-bromine flow battery diaphragm disclosed by the invention, the hydrophilic coating is arranged on the porous diaphragm, so that elemental bromine and polybrominated substances can be effectively adsorbed and fixed, the self-discharge phenomenon of a battery is reduced, and the coulombic efficiency of an electric pile is improved.

The invention discloses an anti-reflection wear-resistant nano hydrophilic anti-fog lens and a preparation method thereof, and the method comprises the steps: carrying out the injection molding, ultrasonic deep cleaning and surface cleaning treatment of the lens, and obtaining a clean substrate layer; preparing an organic silicon resin hardening liquid, coating the surface of the substrate layer with the organic silicon resin hardening liquid, and curing to obtain an organic silicon resin layer; preparing a nano hydrophilic coating; cleaning the surface of the organic silicon resin layer, keeping the surface dry, and activating by using plasma equipment; and coating the surface of the activated organic silicon resin layer with a nano hydrophilic coating, and then baking at the temperature of 40-120 DEG C for 6-0.5 h to obtain the nano hydrophilic coating. According to the invention, a nano hydrophilic coating containing modified silicon dioxide is adopted to be in covalent bond connection with an active group in the organic silicon resin layer, so that lasting hydrophilic modification of the substrate layer is realized, a water drop contact angle is less than 6 degrees, super-hydrophilicity can be presented without illumination, and the super-hydrophilic group has low chemical activity, is not easy to pollute and is convenient to clean; the service life is long.

The invention provides a hydrophilic coating urethral catheter package capable of preventing liquid from being brought out and extruded and infiltrated, the hydrophilic coating urethral catheter package comprises a catheter body, a connector and two poking pieces, a containing cavity for containing a urethral catheter is formed in the center in the catheter body, water storage grooves are formed in the two sides of the containing cavity, the interiors of the water storage grooves are used for storing a solution, and the two poking pieces are connected with the connector. A groove wall film is arranged on the face, adjacent to the containing cavity, of the water storage groove, a structure used for fixing the poking piece is arranged at the top end in the water storage groove, a structure capable of puncturing the groove wall film is arranged at the bottom end of the poking piece, and soft rubber pressing shells corresponding to the poking piece are arranged on the two sides of the outer portion of the pipe body. In a normal state, the solution is stored in the water storage tank, the catheter is prevented from being soaked in the solution for a long time, and the preservation time of the solution and the catheter is prolonged. When the catheter needs to be used, only the soft rubber pressing shells on the two sides need to be pressed, after the groove wall thin film is punctured through the shifting piece, solution flows down along the catheter to complete infiltration, and dry and wet separation of the catheter is truly achieved.

The invention discloses a coating technology of a self-cleaning glass coating, which adopts a water-based paint containing nano TiO2 / SiO2 hybrid sol (core-shell structure), a polyurethane modified silane coupling agent and a flatting agent, and forms a 150-300nm super-hydrophilic coating (the contact angle is less than or equal to 5 degrees) on the surface of glass through a synergistic process of gradient curing (three-stage heating at 80-150 DEG C) and ultraviolet radiation (a main wave band of 365nm and an auxiliary wave band of 280-320nm). The technology breaks through the bottleneck that low-temperature curing and high adhesive force are difficult to be compatible, and the contact angle of the coating is still lt after damp-heat aging; 10 degrees, the light transmittance loss lt; and 3%, the photovoltaic module is suitable for building curtain walls, automobile windshields and photovoltaic modules. The method comprises the following steps: (1) bonding a polyurethane chain segment with a mechanical interlocking enhanced interface through a hydrogen bond; (2) the SiO2 shell layer improves the TiO2 quantum efficiency; and (3) equipment zoned humidity control and inert atmosphere oxidation inhibition are realized, and unification of self-cleaning performance, optical performance and mechanical durability is realized by an environment-friendly process.

The utility model relates to the technical field of medical engineering, and discloses a cutting balloon and medical equipment. The cutting balloon comprises a balloon body, a cutter assembly and a hydrophilic coating. The multiple cutter assemblies are arranged on the outer wall of the balloon body and distributed in the circumferential direction of the balloon body at intervals. A hydrophilic coating is arranged on the outer wall of the balloon body. When the cutting balloon moves in a blood vessel, in a wet state, the hydrophilic coating is activated, the hydrophilic coating has high lubricating performance when making contact with blood, the penetrating performance of a cutter assembly of the cutting balloon at the complex tortuous position of the blood vessel can be improved, the trafficability of the cutting balloon is improved, and the passing success rate is increased in the process that the cutting balloon leads to a diseased region or retracts; and the operation safety and convenience are improved.

The invention discloses porous carbon with a gradient structure, a preparation method of the porous carbon and application of the porous carbon in a negative electrode of a lithium ion battery. The porous carbon has a gradient structure with compact micropores on the surface and loose macropores inside. The preparation method of the porous carbon comprises the following steps: carrying out oleophylic modification on SiO2 to obtain hydrophobic SiO2; carrying out hydrophilic coating on NH4Cl to obtain PVP (Polyvinyl Pyrrolidone) coated NH4Cl; the preparation method comprises the following steps: mixing coal pitch, methylbenzene, oleic acid, hydrophobic SiO2 and PVP (at) NH4Cl to form a suspension; preparing a spherical precursor by a micro-fluidic emulsification method; and carbonizing, sequentially carrying out oxygen plasma treatment and HF solution etching, and removing the template to obtain the porous carbon with the gradient structure. The gradient distribution of the template and the pore-forming agent is realized through surface modification difference and a microfluidic technology, the pore structure and the particle size can be accurately regulated and controlled, the process is simple, the compatibility is high, the prepared porous carbon can be used as a substrate for a silicon-carbon composite negative electrode material, the volume expansion of silicon can be effectively buffered, and the service life of the silicon-carbon composite negative electrode material is prolonged. And the first coulombic efficiency, the specific capacity and the cycling stability of the lithium ion battery are improved.

An intermittent hydrophilic urinary catheter (1) with a hydrophilic coating (9) and comprising a plurality of drainage openings (5) is provided. The outer surface (8) of the tubular portion (1a) forms a projection (410) encircling the openings in the outer surface and extending above the hydrophilic surface (411) when the hydrophilic material is in the non-swelled condition.

The invention provides high-caking low-dust tofu cat litter and a preparation method thereof.The high-caking low-dust tofu cat litter is prepared from, by mass, 40%-60% of bean dreg fiber, 15%-25% of antibacterial high-capacity ammonia adsorption modified zeolite, 8%-15% of a composite binder, 1%-2% of compound vegetable gum, 1%-5% of a hydrophilic coating agent, 0.5%-3% of a food-grade dust suppressant and the balance water. According to the invention, agglomeration is enhanced through composite bonding and zeolite embedding, dust is reduced through a triple dust control process, long-acting deodorization and antibiosis are realized by virtue of modified zeolite, the finished product block mass is free of looseness, low in dust, deodorant and antibacterial, and the process is simple, convenient, easy to industrialize, capable of being naturally degraded and suitable for daily cleaning and nursing scenes of family pet cats.

The invention relates to the technical field of biomedical materials, and particularly discloses a tracheal catheter with antibacterial and lubricating functions and a preparation method thereof.According to the tracheal catheter, 2, 3-epoxypropyltrimethylammonium chloride is adopted for modifying polyethyleneimine, and the antibacterial performance of the polyethyleneimine is enhanced; then modified polyethyleneimine and tannic acid are adopted as a composite antibacterial coating, so that the tracheal catheter has good antibacterial activity on various bacteria; then N-vinyl pyrrolidone and modified fucoidin are adopted as functional monomers, ultraviolet-initiated polymerization is conducted, the hydrophilic lubricating coating is obtained, sulfuric acid groups in the hydrophilic lubricating coating are negatively charged and can attract quaternary ammonium salt cations in the antibacterial coating through electrostatic interaction, and therefore the hydrophilic lubricating coating is formed. Compared with a single polyvinylpyrrolidone (PVP) hydrophilic coating which is easy to fall off, the hydrophilic lubricating coating disclosed by the invention effectively solves the problem that the traditional hydrophilic coating is easy to fall off.

The invention discloses a hydrophilic coating as well as a preparation method and application thereof, and belongs to the technical field of coating materials. The hydrophilic coating comprises a base coating and a lubricating coating attached to the base coating, the thickness of the base coating is 0.1-120 [mu] m, and the thickness of the lubricating coating is 0.1-100 [mu] m. The lubricating coating is prepared from the following components in percentage by mass: 10 to 20 percent of thiolated hyaluronic acid, 40 to 50 percent of sodium hyaluronate, 10 to 20 percent of sulfobetaine, 5 to 10 percent of ethanol and the balance of water. 100 parts by mass of the substrate coating comprise the following components: 25-35 parts of polyimide, 5-15 parts of polyvinylpyrrolidone, 5-8 parts of modified chitosan, 1-3 parts of a cross-linking agent and the balance of a solvent. According to the hydrophilic coating provided by the invention, the defects in the prior art are successfully overcome through a specific multi-layer structural design and a specific material ratio, and the prepared hydrophilic coating has excellent hydrophilicity, lubricity and adhesive force.