43results about How to "Change surface topography" patented technology

The invention discloses a calcium-phosphorus-silicon biological ceramic coating and a preparation method and application thereof. After magnesium and alloy of magnesium are put in a calcium-phosphorus electrolyte for powered-on electrolysis for a set time, a sample containing a calcium-phosphorus coating is put in a silicon salt electrolyte for powered-on electrolysis, and the target biological ceramic coating is obtained; and the calcium-phosphorus electrolyte is prepared by adding calcium salt and (NaPO3)6 into a basic electrolyte, and the silicon salt electrolyte is prepared by adding silicate into the basic electrolyte. A compact layer is connected with a basal body, the compact layer and the basal body are tightly combined, and the mechanical property of the basal body can be improved; in addition, pores barely exist in the compact layer, body fluid can be prevented from flowing to the surface of the basal body to make contact with the basal body, metal ions generated after the basal body is corroded also can be prevented from being diffused to the human body, toxicity is reduced, and biocompatibility is effectively improved; and a surface layer is a porous loose layer, combination of an implant and a bone can be effectively improved in the presence of micro-pores, growth of adherence bone tissue of bone cells can be effectively improved, and the biological activity of the coating can be improved.

The invention relates to a preparation method of an environmentally-friendly low-temperature shift catalyst. Through adding an M (K, Rb, Cs, Mg, Sr, Ba and the like) metal element into the existing Cu/Zn/Al catalyst, the purpose of restraining the methanol synthesis side reaction is achieved. The catalyst is characterized in that under the same water/carbon ratio (vapor-air ratio) conditions, after the Cu/Zn/Al/M catalyst is modified by the M, the selectivity of the low-temperature shift catalyst is remarkably improved, the hydrogen output is high, and the contents of alcohol and amine in condensate are lower so as to provide better conditions for condensate recovery and utilization and environment protection.

The invention discloses a method for improving the wetting and spreading performance of a reaction wetting system material. The method comprises the following steps that the surface of a stainless steel base plate is scanned and processed by adopting an ultrafast laser processing technology to obtain a micro-nano stripe texture of which the stripe average width is 1.2-1.4 microns and the stripe average spacing is 1.4-1.6 microns; and the wetting angle of the same brazing filler metal on the scanned and processed stainless steel base plate is 0.9 degrees - 3.3 degrees smaller than the wetting angle of the same brazing filler metal on an unprocessed stainless steel base plate. According to the method, microtexture processing is carried out on the surface of the reaction wetting system material through ultrafast laser, the surface appearance of the reaction wetting system material is changed, the surface roughness is changed, the unique morphology of the micro-nano stripe texture is obtained, and the unique morphology of the micro-nano stripe texture can greatly enhance the capillary action in the brazing filler metal wetting and spreading process, so that the wetting and spreading power of the brazing filler metal on the surface of the reaction wetting system material is improved, the brazing filler metal reacts with the base plate more sufficiently, and the application prospectis great.

The invention discloses a forward osmosis membrane with a separation function. The special forward osmosis membrane with the multivalent separation characteristic is prepared on a polymer based membrane, so that the forward osmosis flux is increased, and separation on multivalent ions in a draw solution is simultaneously achieved; thus, monovalent ions can permeate through the membrane to enter araw material solution, and the multivalent ions cannot permeate through the membrane. The special forward osmosis membrane has special application value in concentrating strong brine and changing a proportion among different saline ions in the strong brine. The special forward osmosis membrane disclosed by the invention not only has a concentrating function, but also has a function of adjusting the proportion among saline components in water. As industrial wastewater zero release projects are propelled in China, the special forward osmosis membrane with the multivalent separation function hasa wide application prospect.

The invention discloses a uvioresistant and anti-static chemical fiber yarn and a preparation method thereof. The preparation method comprises the following steps: at first, loading a plurality of silver ions on a modified metal organic framework, blending with spinning solution to obtain chemical fiber, grafting AESO outside the chemical fiber, and carrying out copolymerization on modified microspheres to obtain a chemical fiber inner layer; manufacturing modified microspheres by taking methyl methacrylate as a wall material and taking hexadecane, plant essence and beta-1,4-polyglucosamine ascore materials; and adding an ultraviolet absorbent and dopamine in absorbing film slurry, and soaking the fiber inner layer in the absorbing film slurry for 20-30 hours, and taking the fiber inner layer out. Through synergistic effect of the modified metal organic framework, the modified microspheres, the absorbing film slurry and the like, the problems about hydroscopicity, antibacterial property, fragrance retention property and washability of common chemical fiber fabric are improved to a greater degree, and higher practicality is improved.

The invention relates to a preparation method of a hydrophilic titanium dioxide nano-film, which is characterized in that ammonia is added during the preparation process of the titanium dioxide nano-film. The method comprises the following steps: (1) raw material proportioning; (2) burdening: the raw materials proportioning is selected and a certain amount of the materials are weighted to be made into sol; (3) film painting: the sol is painted on the surface of hardened substance; (4) thermal treatment: the sintering is carried out under the temperature of 600 DEG C to 1000 DEG C with the sintering time of 0.5-3 hours so as to obtain the hydrophilic titanium dioxide nano-film. The invention changes the structure, surface morphology and surface defect degree of nanometer semiconductors so as to improve the visible light absorption within the forbidden bandwidth; in addition, the test indicates that the hydrophilicity of the titanium dioxide nano-film is significantly improved.

The invention discloses an LED epitaxial growth method, which sequentially comprises the steps of processing a substrate, growing a low-temperature GaN buffer layer, growing a non-doped GaN layer, growing a Si-doped N-type GaN layer, growing a multi-quantum well layer, growing an AlGaN electronic barrier layer, growing a Mg-doped P-type GaN layer, and cooling. Wherein the growth of the multi-quantum well layer sequentially comprises the steps of In-doped pretreatment, InGaN well layer growth, Ga2O3 pre-growth, Ga2O3 layer growth, annealing treatment, GaN gradient layer growth and GaN barrier layer growth. According to the method, the problems of low quantum well growth quality and low quantum well radiation recombination efficiency in the existing LED epitaxial growth method are solved, so that the luminous efficiency of the LED is improved.

The invention discloses a preparing method and application of a CuSbS2 nanoparticle. The particle is an agglomerate with a regular square rod-shaped structure. The preparing method comprises the stepsthat copper salt, antimonic salt and a sulfocompound are dissolved in a solvent, and then a precursor solution is prepared after the materials are fully dissolved; a microwave method is adopted for preparing the CuSbS2 nanoparticle; a Na2S solution is added into the obtained CuSbS2 nanoparticle for removing impurity phases. According to the CuSbS2 nanoparticle and the preparing method and application thereof, by regulating preparing technologies and parameters, the purpose of regulating the crystal appearance is achieved, then the ideal crystal surface appearance is prepared, the photocatalytic performance of the CuSbS2 nanoparticle is improved, and the CuSbS2 nanoparticle can increase the degradation rate of rhodamine B under 7 hours of illumination by an xenon lamp of 500 W to 96% from19%.

The invention discloses a supercapacitor electrode material and a preparation method thereof. The preparation method comprises the following steps of: by taking potassium permanganate as a reducing agent and manganese sulfate as a manganese source, preparing sea urchin-shaped nano alpha-MnO2 by adopting a hydrothermal method, then performing hydroxylation modification, grafting polyimide resin tothe sea urchin-shaped nano alpha-MnO2 by adopting a click chemistry mode to obtain the sea urchin-shaped nano alpha-MnO2 grafted polyimide resin, and carrying out high-temperature activation treatmenton the sea urchin-shaped nanometer alpha-MnO2 grafted polyimide resin by adopting potassium hydroxide to obtain the sea urchin-shaped nanometer alpha-MnO2 in-situ modified porous carbon supercapacitor electrode material. By using the electrode material, the defects of MnO2 crystal lattices are improved, the conductivity and stability of electrons are improved, protons and the electrons can freelyflow among the crystal lattices, rapid transmission of ions and the electrons of an interface is guaranteed, the charge transfer path can be shortened, more active sites are provided for charge storage, the electron trapping and transfer capacity is enhanced, and the mechanical stability is also improved.

The invention discloses a biocompatible iron-manganese dioxide system micro-nano motor and a preparation method thereof, belongs to the field of micro-motor preparation and application, and can greatly reduce the manganese content in the micro-nano motor and improve the biocompatibility of the micro-nano motor under the condition of not reducing the movement speed of the micro-nano motor. According to the invention, the preparation method combines electrochemical deposition and an ultrasonic field, and comprises the steps of firstly, supporting an outer polyethylene dioxythiophene (PEDOT) layer and a middle Fe layer through electrochemical deposition, and then introducing an ultrasonic field while electrochemically depositing an inner MnO2 layer. The obtained micro-nano motor is of a three-layer hollow tubular structure, the content of manganese is reduced from 17.68% to 4.71%-11.33%, but the movement speed can still reach 300-700[mu]m/s, so that the manganese content of the micro-nanomotor is greatly reduced under the condition that the movement speed of the micro-nano motor is not reduced, and the biocompatibility of the micro-nano motor is improved.

The invention discloses a washing-resistant rubber lining for a cyclone and a preparation method thereof. The rubber lining is prepared by taking the nitrile rubber and butadiene rubber as matrix, taking polyurethane cellosilk, carbon fiber and polyamide fiber as the skeleton fiber, taking the sepiolite powder, carbon black and nano-aluminum oxide powder as filler, taking a aluminic ester couplingagent, liquid coumarone resin and modifying additive as the additive, and mixing the raw materials with anti-wearing auxiliary, a sulfurizing agent BPO and DM, wherein the anti-wearing auxiliary is prepared by mixing nitrile rubber powder, dioctyl phthalate, aluminium oxide, succinic acid and KH580; the modifying additive is prepared by mixing KH570, nanometer aluminum hydroxide, acetone and barium hydroxide. By arranging the rubber lining on the inner wall of the cyclone, thus the ore pulp directly impacts on the rubber lining, and the aim of protecting the inner wall of the cyclone is achieved; the rubber lining is easy to change after being damaged, and the service life of the cyclone is greatly prolonged.

The invention relates to a bus bar bending mechanism. The bus bar bending mechanism is composed of a fixed plate, guide rods, an air cylinder, a transition plate, a connecting plate, an upper pressing block, a lower pressing block and a supporting plate. Micro protrusions in array distribution are arranged on the whole lower surface of the upper pressing block, and pits corresponding to the micro protrusions of the upper pressing block are formed in the whole upper surface of the lower pressing block. After a bus bar is in place through the bending mechanism, the upper pressing block presses the bus bar downwards to complete bending motion. The height of a cushion block on the pressing block can be adjusted freely, the production requirements of various solar battery cells of different specifications can be met, and meanwhile the light reflection characteristic and attractiveness of the bus bar can be improved.

The invention discloses an epitaxial wafer of a light emitting diode and a manufacturing method of the epitaxial wafer of the light emitting diode. The manufacturing method relates to a low-temperature buffer layer GaN, an undoped GaN layer, a Si-doped N-type GaN layer, a light emitting layer, a P-type GaN layer and a high-temperature P-type GaN layer, wherein the undoped GaN layer is located on the low-temperature buffer layer GaN, the Si-doped N-type GaN layer is located on the undoped GaN layer, the light emitting layer is located on the Si-doped N-type GaN layer, the P-type GaN layer is located on the light emitting layer, and the high-temperature P-type GaN layer is located on the P-type GaN layer. The light emitting layer comprises InGaN layers and GaN layers in a plurality of periods, and the InGaN layer in each period grows through time slicing. By means of the epitaxial wafer of the light emitting diode and the manufacturing method of the epitaxial wafer of the light emitting diode, InGaN of the light emitting layer grows in a subsection mode, the feature of the surface can be changed, the surface migration rate of In atoms is improved, and the light emitting rate of the light emitting diode is accordingly improved.

The invention relates to the technical field of energetic materials, and particularly discloses a metal corrosion resistant insensitive ammunition and a preparation method thereof. The metal corrosion resistant insensitive ammunition is prepared from, by weight, 0-10% of layered MXene and 90-100% of 3-nitro-1, 2, 4-triazole-5-ketone. The preparation method comprises the following steps of firstly, etching an aluminum layer in an MAX phase with hydrofluoric acid to obtain layered MXene, dissolving the layered MXene and NTO raw materials in absolute ethyl alcohol in proportion, and finally, carrying out evaporative crystallization to obtain the metal corrosion resistant insensitive ammunition. According to the metal corrosion resistant insensitive ammunition, the metal corrosion resistance of NTO is enhanced, and the impact sensitivity and friction sensitivity of NTO are further reduced; and the preparation method is simple, the MAX phase is etched by hydrofluoric acid to obtain conductive MXenes, then the MXenes and NTO are prepared by a recrystallization method, and the preparation method has practical application value.

The invention relates to the technical field of super-hydrophobic materials, and discloses a preparation method and application of pinning-effect-free laser-induced graphene, and the preparation method comprises the following steps: ultrasonically cleaning a polyimide film with deionized water; designing a graphene pattern needing to be processed, and guiding the pattern into a laser engraving machine; setting the laser power and the engraving speed of a laser engraving machine, and carrying out laser treatment on the polyimide film to obtain laser-induced graphene with a pinning effect; the method comprises the following steps: dropwise adding an organic solvent on the surface of graphene or soaking graphene in the organic solvent, and airing at room temperature to obtain the laser-induced graphene without pinning effect. According to the method disclosed by the invention, the laser-induced graphene without the pinning effect can be prepared, the process cost is low, and the method is efficient and stable, and the prepared laser-induced graphene without the pinning effect has super-hydrophobicity and has a good application prospect in the fields of analyte concentration detection, oil-water separation, icing prevention and the like.

The invention provides a copper sheet surface treatment method, which is characterized in that a sand blasting process is used for treating a copper sheet, and carborundum suspension is sprayed to a copper surface at a high speed so as to change the surface appearance of the copper surface and eliminate stripe-shaped defects of the copper sheet in a machining process; when the copper surface defects (impurities, oil stains, stains and oxidation) are removed, certain roughness can be formed on the surface of the copper sheet, a certain surface area is increased for the subsequent process (copper sheet oxidation), and the wettability of DCB sintering is improved; then, nanometer copper coated with the titanium dioxide and the copper sheet subjected to sand blasting are connected in a physical melting mode through laser, a first-stage coarse structure obtained after sand blasting treatment of the copper sheet is modified and optimized to form a third-stage micro-nano structure, the surface roughness of the copper sheet can be adjusted and controlled, and the surface roughness of the copper sheet is made to be uniform; and the nano-copper coated with the titanium dioxide and the micropore structure on the copper sheet synergistically improve the anti-rust hydrophobicity of the copper sheet, so that the service life of the copper sheet is prolonged.