13 results about "Biocoating" patented technology

The application discloses a kind of biological coating with physical mechanical antibacterial and chemical antibacterial performance and preparation method thereof, it is related to biomaterial technical field.The biological coating of the application is composed of TC4 nanofiber network and nano copper deposited in nanofiber network, and the preparation method is: using polishing-washing-sweeping process pretreatment TC4 titanium alloy;It is placed in alkali solution and heated in water bath to activate, and the alloy after activation is repeated polishing, washing, sweeping step, to obtain the substrate to be sputtered;The substrate is magnetron sputtered, and nano copper is deposited on its surface;After depositing nano copper, the substrate is annealed in inert atmosphere and cooled, and the biological coating with physical mechanical antibacterial and chemical antibacterial performance is prepared.The synergistic effect of the biological coating composed of nano copper and nanofiber network can effectively kill staphylococcus aureus, escherichia coli and other pathogenic microorganisms, and can be applied to oral implant, metal implant biomaterial as functional coating.

The application discloses a method for coating a PLA layer of Ag-DCPD film layer surface with doped Ca-Cur submicron modified material, and relates to the technical field of medical material surface biological coating. The method comprises the following steps: an LPBF-NiTi alloy base is manufactured by using a laser powder bed fusion additive manufacturing technology and is pretreated; the pretreated LPBF-NiTi alloy base is subjected to electrochemical deposition in an electrolyte solution to obtain an LPBF-NiTi alloy base with a deposited Ag-DCPD film layer; CaCl2 and curcumin are dissolved in anhydrous ethanol, and are placed in a sealed container containing (NH4)2CO3 for constant-temperature reaction to obtain Ca-Cur submicron modified material; polylactic acid is dissolved in dichloromethane, and then the Ca-Cur submicron modified material is dispersed in the polylactic acid to obtain a leaching solution; the LPBF-NiTi alloy base with the deposited Ag-DCPD film layer is repeatedly immersed and pulled in the leaching solution to obtain an LPBF-NiTi alloy base coated with an Ag-DCPD / PLA / Ca-Cur composite film layer. Through the method, the corrosion resistance, biocompatibility and antibacterial and anti-inflammatory performance of the Ag-DCPD film layer are successfully improved.

This invention provides an eco-biocoating agent, a method for producing the same, and a slow-release fertilizer coated with the same on its surface. [Solution] By utilizing gellan gum and chitin / chitosan, the waste problem can be solved because it is biodegradable, has little environmental impact, and can be used as a substitute for plastic. Furthermore, it can be used in slow-release coating fertilizers, allowing the fertilizer components to be released gradually, thereby providing nutrients at the right time for the crops and ensuring the sustained effect of the fertilizer. In addition, the formed coating layer has excellent mechanical strength, high water resistance, and is firmly maintained even in the external environment. Moreover, it is harmless to the human body and can be used in various application fields such as food packaging materials, medical coatings, and biodegradable packaging materials.

The invention provides a preparation method of a gradient biological coating with a controllable structure, which comprises the following steps: step 1, preparing uniformly mixed TC4 / HA powder by utilizing a low-energy ball milling method before coating deposition; 2, a TC4 / HA coating for relieving the thermal expansion coefficient is prepared on the surface of the titanium alloy through the atmosphere plasma spraying technology; and 3, preheating the base material deposited with the TC4 / HA transition layer, and preparing the HA biological coating with a controllable structure on the surface of the TC4 / HA coating.

The invention belongs to the technical field of medical materials, and particularly relates to a coating with anticoagulation and endothelialization promotion functions and a preparation method and application thereof. In the preparation method of the coating, 2-methacryloyloxyethyl phosphorylcholine molecules are utilized to construct a bionic anti-fouling biological coating, a phosphorylcholine coating is prepared through a thermal initiation free radical reaction and a silane coupling agent polymerization reaction, and biological macromolecules and specific targeting functional polypeptides are introduced. The invention further discloses the coating prepared according to the method and application of the coating in preparation of surfaces of implanted and interventional instruments in contact with blood. The coating disclosed by the invention has a synergistic effect of double functions of anticoagulation and endothelialization promotion, and can be applied to cardiovascular intervention instruments such as artificial blood vessels, cardiovascular stents and left auricle occluders, so that the clinical requirement of long-term biocompatibility of the cardiovascular instruments is met.

Coated metal particles Coated metal particles 10 comprise a coating 14 derived from a molybdate solution that is reactive to the uncoated metal. Typically, the metal is aluminium or aluminium alloy.

The application discloses a door type nail, which comprises a body mechanism, an adjusting mechanism and an anti-rotor mechanism, the body mechanism comprises an arc-shaped body, a pair of base columns are installed at both ends of the arc-shaped body, and nail tips are fixedly connected to the lower ends of the pair of base columns; the adjusting mechanism comprises a rotating rod and a mounting groove, the mounting groove is horizontally and penetratingly arranged in the arc-shaped body, and the rotating rod is rotationally connected in the mounting groove. The elastic self-adaptive fitting of the anti-rotor mechanism can avoid the risk of bone necrosis caused by traditional rigid compression; the variable rigidity arc-shaped body realizes intelligent transition from early rigid fixation to medium elastic conduction, matches the biomechanical requirements in different stages of fracture healing; the biological coating and the micro barb structure cooperatively guide the directional climbing growth of bone tissue, realize the double locking of mechanical fixation and biological fusion; and the use effect of the door type nail is remarkably improved through the improvement of the door type nail, so the door type nail has good popularization value.

The present invention relates to a process for preparing a coating lacquer comprising the following steps: a) providing a natural hydrocolloid and a solvent, the solvent comprising or consisting of water, b) introducing, under stirring, the natural hydrocolloid into the solvent to obtain a pre-hydrolysis solution, the natural hydrocolloid having a concentration ≥ 13% by weight of the total weight of the pre-hydrolysis solution, c) reaching a temperature comprised between 40°C and 57°C, d) introducing a hydrocolloid-specific hydrolyzing enzyme to obtain a coating lacquer, wherein the coating lacquer has a natural hydrocolloid concentration ≥ 13% by weight of the total weight of the coating lacquer.

The invention relates to the technical field of biological coating preparation, in particular to a calcium-phosphorus coating preparation method and system.The method comprises the steps that a to-be-treated base body in a coating preparation environment is pretreated, a pretreated base body is obtained, a coating base material set is used for obtaining calcium-phosphorus precursor slurry, and the calcium-phosphorus precursor slurry is prepared; the method comprises the following steps: carrying out laser melting on a pretreated matrix and calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer, carrying out cooling crystallization on the molten calcium-phosphorus layer to obtain a target coating, carrying out quality detection on the target coating to obtain a detection result, if the detection result is unqualified, obtaining an abnormal type, and carrying out adjustment preparation on the target coating based on the abnormal type. And if the detection result is qualified, taking the target coating as the qualified coating. According to the invention, the high efficiency and stability of preparation of the calcium-phosphorus coating can be improved.

The invention discloses a marine environment concrete anti-corrosion construction method which comprises the following steps: S1, constructing a transmission channel and a transition layer: coating the surface of concrete with an inner porous interface agent to form the transition layer; s2, coating of an active biological coating: coating the transition layer with a biological composite repairing agent to form the active biological coating; the biological composite repairing agent comprises the following components in percentage by weight: 10%-15% of a spore mixture of cyanobacteria and mineralized bacteria, 40%-60% of a biological binder, 4%-6% of nanofibers, 2%-3% of a light stabilizer, 2%-5% of modified attapulgite powder, 0.5%-2% of anhydrous calcium chloride powder and the balance of water, s3, activation and symbiosis: after the active biological coating is coated, a nutrient solution is sprayed, illumination is provided, cyanobacteria and mineralized bacteria are induced to be activated and propagated, a symbiosis system is formed, a biomimetic mineralized skin protection layer is formed, and therefore long-acting, economical and integrated anti-corrosion and anti-abrasion protection of the marine concrete structure is achieved.

This invention discloses a method for integrating and optimizing the arterial filtration function of a membrane oxygenator, relating to the field of membrane oxygenator technology. The method includes the following steps: setting performance target parameters for an integrated membrane oxygenator; using a dynamic tension control process to wind gas exchange membrane fibers around its periphery to construct a temperature-changing unit and an oxygenation unit; during the winding process in step S2, placing multi-layer filter screens at preset positions to construct multi-layer filter screens between the gas exchange membrane fiber layers; using a centrifugal potting process to inject encapsulation material into the end of the component, curing it in one step to form a sealed end that isolates the blood phase, gas phase, and water phase; introducing a biomimetic coating solution into the molded blood channel to construct a biocompatible coating on the substrate surface; performing performance tests on the finished product and comparing it with the performance target parameters in S1; adjusting the process parameters of at least one step from S2 to S5 based on deviation feedback until the product meets the standards; this invention ensures the consistency and compliance rate of product performance.

This invention relates to the field of marine anti-corrosion materials technology, specifically to an underwater curing anti-corrosion and anti-biological coating and its preparation method. The coating comprises an adhesive layer and an anti-biological layer. The adhesive layer, by weight, comprises the following raw materials: 50-60 parts epoxy resin, 1-3 parts modifier, 7-15 parts diluent, 4-10 parts amino silicone resin, 10-15 parts glass powder, 3-5 parts silica, 2.5-7.5 parts silane coupling agent, 0.2-0.5 parts defoamer, and 25-30 parts curing agent. The anti-corrosion coating prepared by this invention has the advantages of high bonding strength, easy maintenance, good corrosion resistance, long service life, and does not pollute the environment.

The utility model discloses a high strength wear -resisting cable for warship relates to warship equipment and marine engineering technical field. The high strength wear -resisting cable for warship, the stress dispersion effect of carbon nanotube, aramid twisted structure and graphene film of reinforcing layer combines, makes cable anti -impact performance promotion 40%, can bear 1000g instantaneous acceleration impact, solves the contradiction of rigid and easy to fold, soft and insufficient strength, the distributed optical fiber of intelligent detection layer and composite shielding layer can real -time monitoring temperature, strain and electromagnetic interference, realizes millimeter level fault location, the hollow glass bead repairing agent of repair layer releases and solidifies automatically when damage, completes micro -damage repair within 30 minutes, and the wear resistance restores above 80%, and the biological adhesion inhibition rate of cooperation biological protection layer 90%, makes maintenance cycle to extend 3 times above, compared with the passive maintenance mode of traditional cable, the fault risk of warship electrical system is reduced greatly, provides long -term safety guarantee for high -end warship equipment.