31results about How to "Promotes deposition growth" patented technology

The invention relates to a silver-loaded antibacterial artificial joint and a preparation method thereof. The silver-loaded antibacterial artificial joint consists of a pure titanium or titanium alloy artificial joint substrate and a micropore sodium titanate bioactivity layer loaded with microelement silver and bone morphogenetic protein (BMP). The sodium titanate bioactivity layer with a micropore structure is combined with the metal substrate surface and is formed by mutually alternately stacking the sodium titanate micropore sodium structures generated by the hydro-thermal reaction between the titanium or titanium alloy substrate surface and sodium hydroxide solution. The silver element and sodium carry out cation exchange to dope into a coating. The BMP is compounded in the micropore structures under the action of the centrifugal force and the capillary. The preparation method comprises the following steps: firstly selecting pure titanium or titanium alloy to process the artificial joint; then adopting the alkaline hydrothermal synthesis technology obtain a sodium titanate layer with the micropore structures on the surface of the titanium artificial joint; doping trace silver in the micropore sodium titanate layer by solution impregnation iron exchange; and finally adopting the centrifugal load technology to load the bone morphogenetic protein in the silver-doped micropore sodium titanate layer.

The invention provides an artificial joint with a micro-nano graded topological surface structure and a preparation method of the artificial joint. The artificial joint is formed by compounding a titanium alloy substrate, a micro-porous titanium dioxide surface layer prepared by a micro-arc oxidization method, and a zinc oxide nano rod or a nano taper deposited and grown on the hole wall of the surface, namely the micro-porous titanium dioxide biological activity surface layer is obtained on the surface of an artificial joint titanium substrate through the micro-arc oxidization method; and furthermore, electric depositing parameters are adjusted and a zinc oxide nano rod/taper is deposited and prepared on the titanium dioxide biological activity surface layer, so as to form the artificial joint with the micro-nano graded topological surface structure. The artificial joint can utilize abundant titanium dioxide micron hole structures on the surface and a zinc oxide nano topological structure deposited and grown in the hole wall to enhance the biological effects of adhesion, growth, multiplication and the like of surface osteoblast, and realize the slow release of the element zinc; and therefore, the antibacterial capability, the biological activity, the biocompatibility and the cell regulating and controlling capability of the surface at an implantation initial stage are greatly improved.

The invention relates to a bioactive artificial joint capable of slowly releasing trace element selenium. The artificial joint consists of a pure titanium or titanium alloy artificial joint matrix and a microporous sodium titanate surface layer loaded with trace sodium selenite and bone morphogenetic protein (BMP), wherein the sodium titanate bioactive layer with microporous structures is combined with the surface of the metal matrix and formed by mutually and alternately stacking the sodium titanate microporous structures generated by carrying out a hydrothermal reaction on the surface of the titanium or titanium alloy matrix and a sodium hydroxide solution, and the trace sodium selenite and the BMP are compounded in the microporous structures through centrifugal force and the effect of capillaries. A preparation method of the bioactive artificial joint comprises the following steps of: firstly, selecting a processed pure titanium or titanium alloy artificial joint; then obtaining the sodium titanate layer with the microporous structures on the surface of the titanium artificial joint by adopting an alkali liquor hydrothermal synthesis technology; and finally, loading the sodium selenite and the BMP in the microporous sodium titanate layer by adopting a centrifugal loading technology.

The invention relates to a functionalized artificial joint with a selenium-loaded nanotube array surface. A titanium substrate surface of the artificial joint is provided with a sodium titanate nanotube array layer, and the inside of the sodium titanate nanotube array layer is further loaded with trace sodium selenite and bone morphogenetic protein. The preparation method of the artificial joint with the functionalized selenium-loaded nanotube array surface comprises the following steps: selecting pure titanium or titanium alloy to process the artificial joint; then adopting the two-step anodizing technology to obtain a titanium dioxide nanotube array layer with a tubular structure on the surface of the pure titanium or titanium alloy artificial joint; adopting the alkaline hydrothermal synthesis technology to convert the titanium dioxide nanotube array layer into the sodium titanate nanotube array layer; and finally adopting the centrifugal load technology to load the trace sodium selenite and the bone morphogenetic protein in the sodium titanate nanotube array layer of the surface of the artificial joint.

The invention relates to a nickel-titanium memory alloy tubular bone internal fixator with a Ti/ZrTi(C,N) gradient coating having good biocompatibility on the surface and a preparation method thereof. The surface of a metal matrix of the nickel-titanium memory alloy tubular bone internal fixator is provided with the Ti/ZrTi(C,N) gradient coating with good biocompatibility, wherein the Ti/ZrTi(C,N) gradient coating has a double-layer structure and consists of a Ti intermediate layer which is contacted with the surface of the nickel-titanium tubular bone internal fixator and a ZrTi(C,N) surface layer; the thickness of the Ti intermediate layer is 0.1 to 0.5 mu m; and the thickness of the ZrTi(C,N) surface layer is 1.0 to 5.0 mu m. The preparation method comprises the following steps: 1) processing the tubular bone internal fixator with a nickel-titanium memory alloy; and 2) performing surface pretreatment on the nickel-titanium memory alloy tubular bone internal fixator, and performing two-step magnetron sputtering treatment to obtain the Ti/ZrTi(C,N) gradient coating consisting of the Ti intermediate layer and the ZrTi(C,N) surface layer in sequence on the surface of the tubular bone internal fixator.

The present invention relates to a g-C3N4/ TiO2 coating with light-control and antibacterial functions and a preparation method thereof. The light-control antibacterial coating consists of TiO2 with athree-dimensional network structure and graphite-like phase carbon nitride (g-C3N4) deposited on the surface of the TiO2. The g-C3N4/ TiO2 coating with a three-dimensional network structure is combined with the surface of a titanium or titanium alloy substrate, rod-shaped nano-array sodium titanate is constructed on the surface of the substrate by a hydrothermal synthesis method, the nano-array sodium titanate is converted into titanium dioxide by a chemical vapor deposition technology, and the g-C3N4 is deposited at the same time. The preparation method comprises the following steps of: firstly, acquiring a rod-shaped nano-array sodium titanate biological coating on the surface of the substrate by adopting a hydrothermal synthesis method; and then converting the coating into titanium dioxide by using a high-temperature annealing technology, taking melamine as a raw material, and depositing g-C3N4 on the surface of the titanium dioxide through a chemical vapor deposition technology soas to finally obtain the g-C3N4/ TiO2 coating with the light-control and antibacterial functions.

The invention relates to a nickel-titanium memory patella claw with a Ti/ZrTi(C,N) gradient coating on the surface through magnetron sputtering, in particular to a nickel-titanium memory patella claw with a Ti/ZrTi(C,N) gradient coating having good biocompatibility on the surface and a preparation method thereof. The surface of a metal matrix of the nickel-titanium memory patella claw is provided with the Ti/ZrTi(C,N) gradient coating with good biocompatibility, wherein the Ti/ZrTi(C,N) gradient coating has a double-layer structure and consists of a Ti intermediate layer which is contacted with the surface of the nickel-titanium memory patella claw and a ZrTi(C,N) surface layer; the thickness of the Ti intermediate layer is 0.1 to 0.5 mu m; and the thickness of the ZrTi(C,N) surface layer is 1.0 to 5.0 mu m. The preparation method comprises the following steps: 1) processing the patella claw with a nickel-titanium memory alloy; and 2) performing surface treatment on the nickel-titanium memory patella claw, and performing two-step magnetron sputtering treatment to obtain the Ti/ZrTi(C,N) gradient coating consisting of the Ti intermediate layer and the ZrTi(C,N) surface layer in sequence on the surface of the patella claw.

The invention discloses an artificial joint having a slow-release function of a rare earth element cerium and a preparation method thereof. The artificial joint consists of a pure titanium or titanium alloy artificial joint matrix and a microporous sodium titanate biological activity layer loaded with the rare earth element cerium and bone morphogenetic protein (BMP). The sodium titanate biological activity layer with a microporous structure is combined with the surface of a metal matrix and is formed by alternately stacking sodium titanate microporous structures generated by a hydrothermal reaction performed between the surface of the titanium or the titanium alloy matrix and solution of sodium hydroxide, the cerium and sodium perform cation interchange and are doped into a coating, and the BMP is compounded into the microporous structure through centrifugal force and under the action of a capillary tube. The preparation method comprises the following steps of: firstly, selecting the pure titanium or the titanium alloy to process the artificial joint well; secondly, forming a sodium titanate layer with the microporous structure on the surface of the artificial joint by adopting an alkali liquor hydrothermal synthesis technique; thirdly, doping the rare earth element cerium into the microporous sodium titanate layer through solution impregnation ion exchange; and finally, loading the bone morphogenetic protein into the cerium-doped microporous sodium titanate layer by adopting a centrifugal load technique.

The invention discloses a degradable magnesium alloy bone nail with a squamous bionic bone nanostructure coating and a preparation method thereof. The degradable bone nail consists of an AZ31B magnesium alloy bone nail matrix and a magnesium oxide bioceramic coating with a squamous bionic bone nanostructure loaded with PLGA-bone morphogenetic protein BMP. The magnesium oxide bioceramic coating with the squamous bionic bone nanostructure is combined with the surface of a metal matrix and the nano-sized squamous nanostructure is constructed on the surface of the matrix by using a micro-arc oxidation technology. The BMP is filled and loaded between magnesium oxide squamous bionic bone nanostructured laminates through centrifugal force and capillary action. The preparation method comprises thefollowing steps: firstly, selecting an AZ31B magnesium alloy and processing into the bone nail; then preparing the magnesium oxide ceramic coating with squamous bionic bone nanostructure characteristics on the surface of the matrix by adopting the micro-arc oxidation technology; finally, loading the PLGA-bone morphogenetic protein between the magnesium oxide squamous bionic bone nanostructured laminates by adopting a centrifugal load technology.

The invention relates to a trace element selenium slow-release type artificial tooth root based on a nanometer tube array surface. A layer of sodium titanate nanometer tube array layer is formed on the surface of a metallic titanium base body of the artificial tooth root, and a trace amount of sodium selenite and bone morphogenetic protein are loaded in the sodium titanate nanometer tube array layer. A preparation method of the trace element selenium slow-release type artificial tooth root based on the nanometer tube array surface comprises the following steps: adopting pure titanium or titanium alloy for processing the artificial tooth root; then, adopting the two-step anodic oxidation technology for obtaining a titanium dioxide nanometer tube array layer with the tubular structure on the surface of the pure titanium or titanium alloy artificial tooth root; next, converting the titanium dioxide nanometer tube array layer into the sodium titanate nanometer tube array layer through an alkaline solution hydrothermal synthesis technology; and finally, loading a trace amount of sodium selenite and bone morphogenetic protein into the sodium titanate nanometer tube array layer on the surface of the artificial tooth root by a centrifugal load technology.

The invention discloses a preparation method and device of an indium arsenide thin film material and belongs to the technical field of semiconductor manufacturing. The method comprises the steps of ultrasonically cleaning a single-side polished mono-crystalline Si substrate and drying, and then feeding the dried mono-crystalline Si substrate into a vacuum chamber for heating and dehydrogenation; heating an arsenic simple substance for volatilization, and driving As air to flow through the surface of the mono-crystalline Si substrate to form an Si-As bond; activating the surface of the mono-crystalline Si substrate, and then growing a buffer layer at a low temperature; growing an indium arsenide thin film on the surface of the mono-crystalline Si substrate; and carrying out furnace cooling to a room temperature, thereby obtaining the indium arsenide thin film material. The method is low in demands on instrument and equipment, low in cost, easy to operate and relatively good in repeatability; and the obtained indium arsenide thin film is uniform and smooth in appearance and surface, preferential growth along (111) orientation is achieved, the thickness is 4.83 microns and the crystal quality is good.

The invention belongs to the technical field of sewage treatment, and discloses a photocatalytic diclofenac purification membrane and a preparation method thereof. The preparation method comprises the following steps: preparing a high-elastic polyurethane-doped nanofiber membrane by utilizing melt electrospinning, and depositing a metal-organic framework material MOFs-YVZr on the outer surface to obtain the photodegradation catalytic membrane. The film can efficiently catalyze the degradation of diclofenac in water under the irradiation of visible light, and is suitable for environments with different pH values.

The invention provides a trachea cannula core and a preparation method thereof. The trachea cannula has the advantages that the operation is simple, the safety is realized, and the efficiency is high. The trachea cannula core comprises a guide tip end and a moulding cannula core, wherein the guide tip end extends outwards from one end of the moulding cannula core; the guide tip end is connected with the moulding cannula core; the outer diameter of the trachea cannula core of a trachea cannula is smaller than the inner diameter of the trachea cannula; the trachea cannula core is arranged in the trachea cannula; the length of the trachea cannula is smaller than the length of the trachea cannula core. The trachea cannula core has the advantages that the guide tip end can replace the trachea cannula, the front end is thinner in the intubation process, and the guide tip end is easily inserted into a trachea; the traditional intubation type is changed, the thinner guide tip end is firstly inserted, and then the trachea cannula is pushed, so that the safety is realized, and the efficiency is high; by combining the moulding cannula core and the guide tip end, while the guide function is guaranteed, the moulding is maintained, the injury to the human body by metal is avoided, more safety is realized, the operation is easy, the price is low, and the manufacturing is convenient.

The invention discloses a GaTe/ZnO-based micro generator and a preparation method thereof, and the method comprises the following steps: preparing a micron wire assembly: forming a ZnO micron wire on a metal substrate through chemical vapor deposition, and taking the ZnO micron wire as a precursor structure; forming a GaTe thin film on the ZnO microwires through chemical vapor deposition, wherein the GaTe thin film is arranged on the ZnO microwires; forming an electrode: placing the prepared micron wire assembly on the PET substrate, manufacturing electrodes at the two ends of the ZnO micron wire covered with GaTe, and connecting output lines to the electrodes; and performing packaging with a protective layer: integrally packaging the PET and the micron wire assembly by using the protective layer. The process is simple, the yield is high, the cost can be reduced, and the prepared GaTe/ZnO microgenerator has higher output power.