413 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.

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 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.

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.

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 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 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.

The invention relates to the technical field of inorganic-organic composite coating materials, and discloses a composite nano super-hydrophilic coating based on template induction and a preparation method thereof.The composite nano super-hydrophilic coating comprises a coating body, and the coating body comprises, by mass, 25%-45% of propanesulfonic aminopropyl silane. According to the composite nano super-hydrophilic coating based on template induction and the preparation method thereof, compared with a traditional hydrophilic coating, the initial contact angle of the composite nano super-hydrophilic coating based on template induction is smaller than or equal to 3 degrees, instant spreading of water drops can be achieved, the super-hydrophilic requirement is met, and the composite nano super-hydrophilic coating based on template induction is prepared through the PVP template induction effect. Hydrophilic groups are directionally enriched on the surface of the coating to form a stable super-hydrophilic interface. Besides, the coating can still keep super-hydrophilicity in the long-time use process, after an ultraviolet aging test, the contact angle of the coating is still kept within 10 degrees and is far superior to that of a traditional silane coating, and the long-term stable super-hydrophilicity of the coating is proved.

The invention discloses a modified sulfonated carbon material and a super-hydrophilic coating prepared from the modified sulfonated carbon material, and belongs to the technical field of hydrophilic coatings. The modified sulfonated carbon material is prepared from the following raw materials in parts by weight: 1 to 10 parts of sulfonic carbon material, 1 to 15 parts of inorganic nano filler, 10 to 20 parts of organic hydrophilic filler, 30 to 60 parts of organic solvent, 0.1 to 20 parts of water and 0.5 to 5 parts of catalyst. The preparation method comprises the following steps: firstly, adding the sulfonyl carbon material, the inorganic nano filler and the organic hydrophilic filler into the organic solvent, then adding water, stirring and ultrasonically dispersing for 10-30 minutes, adding the catalyst into the obtained mixed liquid, continuously reacting for 1-6 hours at 70-90 DEG C, and carrying out suction filtration and washing to obtain the modified sulfonyl carbon material. By modifying the carbon material, the obtained super-hydrophilic coating has excellent corrosion resistance and hydrophilic performance.

The invention relates to the technical field of hydrophilic coating equipment, in particular to LED hydrophilic coating equipment which comprises a machine box, a clamp used for conveniently and rapidly clamping a product is arranged at the top of the machine box, a solution pipe bin is arranged at the bottom of the machine box, and a lamp set used for irradiating the outer surface of the product is arranged in the machine box. A first driving assembly and a second driving assembly are additionally arranged in the machine box, the first driving assembly is used for driving the clamp to ascend and descend in the vertical direction, the second driving assembly is used for driving a product to rotate in the horizontal direction, and the clamp comprises a supporting plate and a plurality of clamping heads. The multiple chucks are evenly distributed on the top of the supporting plate at intervals and used for clamping and positioning products. The purpose of the invention is to optimize the product coating process, so that the solution of the coating can be more uniformly coated to the peripheral side of the product, thereby being beneficial to improving the uniformity of the product coating, and being beneficial to guaranteeing the quality of subsequent curing molding of the product.

The pleating and folding integrated device comprises a base, a rotating disc and a plurality of pleating heads, and the base is used for clamping and fixing a balloon; the turntable is rotatably connected to the base and is used for realizing rolling, holding and folding of the balloon; the multiple pleating heads are movably installed on the rotary disc so that pleating of the balloon can be achieved. After the balloon is pleated, the balloon is directly folded, the folding effect is better, the step of transferring the balloon in the pleating and folding process is omitted, the situation that the balloon is scratched due to the fact that the balloon is transferred between different working heads can be avoided, the phenomenon that a hydrophilic coating or a medicine coating of the balloon is incomplete or falls off is prevented, and the balloon is more stable in performance. The product pleating and folding qualification rate is improved, and the operation effect is prevented from being affected.

The invention discloses a ventricular drainage tube with a hydrophilic coating and a packaging device of the ventricular drainage tube, and relates to the technical field of medical instruments, and the ventricular drainage tube comprises a drainage tube body which is of a hollow tubular structure; the drainage end is arranged at one end of the drainage tube body, and a plurality of drainage holes are formed in the drainage end; the connecting end is arranged at the other end of the drainage tube body, and a connector used for being connected with an external drainage device is arranged at the connecting end; the outer surface of the drainage tube body is coated with a hydrophilic coating. According to the ventricular drainage tube with the hydrophilic coating, the drainage tube body is of a hollow tubular structure, drainage liquid can enter the drainage tube body through the drainage holes in the drainage end and is drained out of a body through an external drainage device, the hydrophilic coating is arranged on the surface of the drainage tube, friction between the drainage tube and tissue is reduced, and the drainage effect is improved. Meanwhile, substance attachment is inhibited, the drainage effect is improved, and the infection risk is reduced.

The invention discloses waterborne polyester as well as a preparation method and application thereof. The preparation method comprises the following steps: putting an intermediate compound into a pre-polycondensation product to carry out polycondensation reaction; wherein the pre-polycondensation product is a product obtained by adding an auxiliary agent into an ester and carrying out polycondensation reaction until the hydroxyl value reaches 80 mgKOH / g-100 mgKOH / g, the chemical structural formula of the ester is shown in the specification, R1, R2 and R3 are independently selected from C4-C12 alkyl groups or aryl groups, R4 and R5 are independently selected from C2-C9 alkyl groups; the chemical structural formula of the intermediate compound is shown in the specification, R6 is C3-C6 alkyl, and R7 is methyl or ethyl. The super-hydrophilic coating prepared from the water-based polyester prepared by the method has super-hydrophilicity, high wear resistance and long service life, and is suitable for the fields of building glass, medical equipment, automobile glass, electronic screens and the like which require antifogging, self-cleaning and durability requirements.

The utility model discloses an elastic super-selection loach type bourdon tube lens system which comprises an operation portion and an insertion catheter connected with the operation portion, the insertion catheter is internally provided with at least a first channel, a second channel, a third channel and a fourth channel, a lens assembly is arranged in the third channel, and the fourth channel is internally provided with a second channel. An elastic metal wire is arranged in the tube wall of the insertion catheter, the elastic metal wire is spirally arranged in the length direction of the insertion catheter, and a hydrophilic coating is further arranged on the periphery of the insertion catheter. According to the elastic super-selection loach type bourdon tube lens system, the structure of the insertion catheter is improved, so that the elastic super-selection loach type bourdon tube lens system has better flexibility and strength, not only is good in torsion control performance and convenient to operate, but also is provided with a thin-wall large-cavity structure, and internal pipelines or tube bundles are convenient to arrange.

The invention discloses a durable super-hydrophilic coating for a flexible substrate and a preparation method of the durable super-hydrophilic coating, and relates to a coating and a preparation method thereof. The problems that an existing hydrophilic coating is poor in stability and complex in preparation process are solved. The durable super-hydrophilic coating is prepared from a water-based copolyester emulsion containing hydroxyl and carboxyl side groups, a water-based resin system curing agent, isopropanol and nano barium sulfate, the method comprises the following steps: 1, preparing a water-based emulsion; (2) coating; 3, electrostatic treatment; and 4, curing treatment. The invention relates to a durable super-hydrophilic coating for a flexible substrate and a preparation method of the durable super-hydrophilic coating.

Hygienic Hydrophilic coatings, hydrophilic coating formulations and wetting fluids that include an anti-infective agent.