253results about How to "low cost of preparation" patented technology

A microfluid-based microballoon preparation method adopts a microfluid channel system to lead a colloidal solution or a pre-polymer solution to form liquid drips in a mobile phase. The formation of the liquid drip-based template is used for bioanalysis and polymeric micro spheres of protein, gene and drug screening carrier. The preparation method includes the following steps: preparation of the microfluid channel: establishing a microfluid channel network by adopting the micro-machining technology or connecting a T-shaped channel with a pinhead, a polymer pipe and a tee joint (the channel is provided with two inlets, namely, a dispersed phase inlet and a continuous phase inlet and an outlet); preparation of the liquid drip template: encasing the two phase solutions of a dispersed phase solution and a continuous phase solution respectively into a pin case, connecting with the respective inlet, digital controlling an ejector jet pump to control the velocity of flow of the two phase solutions and acquiring even and stable liquid drip template from the outlet; preparation of the microballoon: drying and solidifying the liquid drip template and removing the impurities on the surface or inside to acquire a polymer microballoon according with the requirement of bioanalysis and protein, gene and drug screening carrier.

The invention provides a preparation method of macroporous-mesoporous alumina, which comprises the following steps: a, dissolving reaction assistants and aluminum salts into solution of an organic solvent, wherein the molar ratio of the reaction assistants and aluminum ions is (3-5): 1, dissolving a template agent into the solution, wherein the molar ratio of the aluminum ions and the template agent is 1: (0.015-0.025), and finally controlling the PH value of the solution to be 3.5-6.0; b, aging the solution prepared in Step a to gradually remove the organic solvent and water in the system, thereby obtaining a macroporous-mesoporous alumina precursor; c, calcinating at the temperature of 400-800 DEG C, thereby obtaining macroporous-mesoporous alumina powder. The invention has the advantages of simple process, regular pore canals and centralized pore size distribution, and can realize controlled regulation according to specific application conditions. Therefore, the invention has significant value of application in heterogeneous catalysis and adsorptive separation in the petrochemical industry and the use as the catalyst carrier, energy material and the like.

The invention relates to a carbon-supported core-shell type platinum cobalt-platinum catalyst for fuel cells and a preparation method for the carbon-supported core-shell type platinum cobalt-platinum catalyst, belonging to the field of electrochemistry. The catalyst comprises the following components in percentage by weight: 60%-90% of a carrier, 1%-20% of cobalt, and 9%-20% of platinum. According to the invention, a mixed solution of ethylene glycol and sodium borohydride acts as a reducing agent, the core-shell type platinum cobalt-platinum catalyst Pt-Co@Pt/C with an ordered structure is prepared by high-temperature annealing treatment. The catalyst with the ordered structure, which is prepared by the invention, has the advantages of low Pt carrying capacity, high catalysis activity, high stability and the like, and the development of fuel cells can be promoted further.

The invention discloses a hydro-fining catalyst roasted at a low temperature and a preparation method thereof. The preparation method comprises the following steps of: taking aluminum hydroxide dry glue or modified aluminum hydroxide dry glue as a raw material to prepare a catalyst carrier, then impregnating metal active components in VIB and VIII groups and preparing the hydro-fining catalyst through drying and roasting. The content of an alumina carrier is 60-90 weight percent, the content of metallic oxide in the VIB group is 5-35 weight percent, and the content of metallic oxide in the VIII group is 1-10 weight percent. An activity phase of the catalyst has proper stacking layer number and film crystal length, the interaction between the carrier and metal is reduced, the better dispersion state of the active components can be kept, and the HDS (Hydro-desulfurization) ability of sulfide difficult to remove in an oil product is improved. The hydro-fining catalyst is particularly suitable for the hydro-desulfurization of naphtha, the hydro-fining of inferior diesel oil and the hydro-treatment of FCC (Fluid Catalytic Cracking) raw materials or hydro-cracking raw materials and other distillate oil.

The invention discloses a regular structure adsorbent and a preparation method to greatly improve the diffusion efficiency of the adsorbent. The regular structure adsorbent is prepared from a support, an adsorbent material, a binder and other additives. The fibrous support, the powdery adsorbent material, the binder and other additives are mixed and dispersed in a solvent, a catalyst precursor is prepared firstly and then dried and activated to form the adsorbent. The regular structure adsorbent is applicable to purification separation processes of multiple gases, such as air separation, hydrogen separation, carbon dioxide separation, methane separation and the like, and the synthesis method is simple, good in repeatability and prone to industrialization.

The invention discloses a heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and a preparation method thereof. The composite material is prepared from certain proportions of PP (polypropylene) fiber, PET (polyester) fiber and hollow PET fiber, the mixed fiber is prepared into a composite felt by a certain acupuncture process, and an appropriate die pressing process is adopted to prepare a composite fiber felt. The composite material disclosed by the invention keeps lower surface density, good bending performance and good dimensional stability, can also meet the functional requirements for heat insulation and sound insulation, and can be used for preparing medium and high-grade automobile interior trim materials.

The invention discloses a preparation method for biomass medicinal charcoal, which belongs to the technical field of processing and preparation of activated charcoal, and aims to reduce ash content in activated charcoal and to improve adsorption performance of the activated charcoal. The method comprises the following steps: crushing biomass and screening the biomass with a 20 to 200 mesh sieve; carrying out pickling and alkali washing on the biomass after screening and removal of impurities; drying the biomass; sending the raw material of the treated biomass to an activation furnace, heating the raw material to a temperature of 300 to 600 DEG C under the protection of nitrogen and carrying out carbonization for 30 to 240 minutes; allowing carbon dioxide to enter into the activation furnace at a temperature of 800 to 1000 DEG C, carrying out carbonization for 30 to 360 minutes, with gas flow being 10 to 300 L/h, and after carbonization, cooling the biomass to room temperature so as to obtain the biomass medicinal charcoal. Ash content, decolouring capacity and adsorption quantity of the prepared biomass medicinal charcoal are all superior to those of wooden activated charcoal; the biomass medicinal charcoal has the advantages of a simple operation process, low cost, suitability for large scale production and strong market competitiveness.

The invention belongs to the field of electrochemical materials and discloses a nitrogen doped graphene material and a preparation method thereof. The preparation method of the nitrogen doped graphene material comprises the following steps of: preparing graphite oxidize; preparing graphene oxide solution; preparing mixed solution of graphene oxide and ammonium carbonate; removing solvent in the mixed solution of the graphene oxide and ammonium carbonate; and calcining mixture of graphite oxide and ammonium carbonate, thus obtaining the nitrogen doped graphene oxide material. The nitrogen doped graphene material and preparation method thereof which are disclosed by the invention have the advantages that preparation cost is lower, mass production is easy to realize, product purity is high, ammonium carbonate is completely decomposed into gas at high temperature and no pollution is produced to a product.

The invention discloses a preparation method of a composite potassium permanganate sustained-release agent. According to the invention, paraffin is added into a vessel and is heated, until paraffin is completely molten; silica sand is added into paraffin, and the mixture is well mixed by stirring; when silica sand is completely infiltrated by paraffin, potassium permanganate powder is added, and the mixture is well mixed by stirring; when still hot, the mixture is rapidly poured into a mold, and is tamped; and the mixture is cooled and molded, such that composite potassium permanganate sustained-release systems with different sustained-release times can be prepared. The method provided by the invention aims at solving problems of low oxidant utilization rate, large non-selective consumption, oxidizing agent mass transfer and the like in processes of underground water pollutant removing through liquid and powdery potassium permanganate in-situ chemical oxidation. Therefore, oxidant sustained-release, effective transferring, and high-efficiency oxidation are realized.

The invention provides a method for preparing a monocrystal Bi2Se3 nano structure. The Bi2Se3 nano structure comprises a nano belt and a nano sheet, wherein the width of the Bi2Se3 nano belt is 50nm to 4Mum, the length of the Bi2Se3 nano belt is 1-200Mum, and diameter of the Bi2Se3 nano sheet is 50nm to 20Mum. According to the method provided by the invention, high temperature thermal evaporation and gas phase transmission methods are adopted, Bi powder and Se powder or Bi2Se3 powder are taken as raw materials, thermal evaporation is carried out in a high temperature diffusion furnace, and the Bi2Se3 nano structure is obtained on a substrate. The Bi2Se3 nano structure obtained by the invention is a high-quality monocrystal material, no catalyst is used in a synthetic process, influence of introduced foreign impurity to material property is avoided, the method provided by the invention is simple and practicable, repeatability is good, raw materials and the substrate are available, and preparation cost is low.

The invention relates to a method for preparing an aluminum matrix composite, in particular to a method for preparing a graphene reinforced aluminum matrix composite by using graphite micro pieces as raw materials to solve the problems that current graphene reinforced aluminum matrix composites are high in cost, composite castings are poor in performance, and opening of graphene piece layers is insufficient. The preparation method comprises the steps of weighing, graphite micro piece dispersion and precast block forming, aluminum metal vacuum permeation, large plastic deformation treatment and component homogenization treatment. According to the method, the low-cost graphite micro pieces are used as the raw materials, a graphite micro piece reinforced aluminum matrix composite is firstly prepared, and the prepared few-layer graphene reinforced aluminum matrix composite is excellent in comprehensive performance, over 90 GPa in elastic modulus, over 400 MPa in tensible strength and over 230 W/(m.K) in heat conductivity. The method is applicable to preparing the graphene reinforced aluminum matrix composite.

Belonging to the field of metallurgical sample detection, the invention relates to a preparation method of a standard spectrum sample. The method includes the processes of: component selection, preparation of a standard sample through a continuous casting middle ladle top pouring method, stability investigation and conclusion. The method is characterized in that the process of preparing the standard sample by the continuous casting middle ladle top pouring method comprises the steps of: model baking, sample model establishment, sample model pouring by the top pouring method, demolding, segmentation and surface treatment, physical property detection, surface treatment, chemical component uniformity test, and fixed value analysis. The standard sample prepared in the invention not only satisfies the standard sample requirements in terms of physical property, texture, component range and uniformity, but also has reduced preparation cost and increased sampling number. At least 200 pieces can be prepared every time, thus being over 20 times as many as a model casting sampling number. And the preparation number can satisfy the current production requirements. Thus, the standard sample preparation method of the invention boasts very high practical value.

The invention relates to a tissue engineering double-layered tubular support and a preparation method thereof. The support is composed of two polymer layers with different pore structures, the inner layer is a compact nanofiber structure, and the outer layer is of a porous nanofiber structure. The preparation method comprises the following steps of: dissolving a polymer material in a solvent, pouring in a mould, performing phase separation overnight, demoulding to obtain a polymer gel, performing solvent replacement, and freeze drying to obtain a nanofiber tubular support with a compact structure; sleeving the nanofiber tubular support on a mould stem to obtain a casting mould; and dissolving a polymer material in a solvent, casing the polymer solution in the casing mould by combing an electroporation technology, performing phase separation overnight, demoulding, performing solvent replacement, removing the solvent and/or porogen, and freeze drying to obtain the tissue engineering double-layered tubular support. The preparation method disclosed by the invention is simple in operation, free of complicated equipment, suitable for large-scale production and low in preparation cost; the whole mechanical property of the support is improved by introducing other polymers in the phase separation system.

The invention discloses a method for preparing lithium silicate material absorbing high-temperature CO2 by taking artificial zeolite as raw material, and provides a process for preparing lithium silicate material serving as high-temperature CO2 absorbent by use of artificial zeolite. Lithium silicate precursors are prepared from LiNO3 and artificial zeolite in different proportions by ion exchange and sol-gel methods, and the lithium silicate material is synthesized by roasting the lithium silicate precursors at a temperature between 600 and 900 DEG C for 2 to 8 hours. The lithium silicate material prepared absorbs CO2 in a thermogravimetric analyzer at a temperature between 400 and 700 DEG C in CO2 and N2 atmosphere in different proportions. Aiming at the problem of a great amount of high-temperature CO2 emitted from power plants and flue gas, the method recycles carbon resources and reduces CO2 emission. The method synthesizes the lithium silicate material by taking cheap artificial zeolite and LiNO3 as raw material and adopting the ion exchange and sol-gel methods. Compared with the prior art, the method has the advantages of cheap and readily available artificial zeolite used as the raw material, reduction in preparation cost of the lithium silicate material and easiness of realizing industrial production.

The invention relates to the field of natural medicine, in particular to a method for preparing C20 position dehydroxylation dammarane type rare ginsenoside and aglycone thereof. The method for preparing the C20 position dehydroxylation dammarane type rare ginsenoside and the aglycone thereof is achieved by combining multiple means of semi-synthesis preparation, chromatogram separation and purification and the like. The method is characterized in that ginsenoside Rg2, Rh1, Rg3, Rs3 and Rh2, protopanoxadiol and protopanaxatriol are used as raw materials, one-step dehydration reaction is performed under the acidic condition, C20 position hydroxyl is removed to generate double bond isomerous series C20 position dehydroxylation dammarane type rare ginsenoside and the aglycone thereof, a liquid phase is prepared to enrich a target compound, and the target compound is concentrated and freeze-dried to obtain the C20 position dehydroxylation dammarane type rare ginsenoside and the aglycone thereof. According to the method, raw materials are easy to obtain, the reaction steps are simple, and the preparation cost is low.

The invention discloses an intelligent induction type automatic card taking and swiping device. The intelligent induction type automatic card taking and swiping device comprises an automatic card taking and swiping device body, a telescopic rod structure, a card taking and swiping panel and a bodywork induction control device, wherein the telescopic rod structure, the card taking and swiping panel and the bodywork induction control device are installed on the automatic card taking and swiping device body. The bodywork induction control device comprises an ultrasonic sensor, an amplifying circuit, an automatic control system and a motor. One end of the telescopic rod structure is arranged in the automatic card taking and swiping device body, and the other end of the telescopic rod structure is connected with the card taking and swiping panel. The card taking and swiping panel is provided with a card taking button, a card taking area and a card swiping area. By utilizing the intelligent induction type automatic card taking and swiping device, the time when vehicles pass through a highway tollgate can be shortened, the jamming conditions of the vehicles are reduced, and meanwhile hidden safety hazards in the passing process for drivers and the vehicles can be lowered. Accordingly, the purposes of being safe and efficient are achieved.

The invention discloses a process for preparing nano calcium sulfate by adopting lime and ammonium sulfate as raw materials. The preparation process comprises the following steps of: emulsification of lime calcium oxide; generation of nano calcium sulfate slurry by reacting a calcium hydroxide emulsion containing a change-inhibiting agent with an ammonium sulfate solution; filtering and washing; drying; and the like. The process is suitable for ammonium sulfate solution reclamation and ammonia recycling treatment in a process of producing ferric oxide series pigments by adopting ferrous sulfate as a raw material, and is a critical core technology of the process of preparing the ferric oxide series pigments by using the ferrous sulfate as the raw material. The change-inhibiting agent is introduced in the preparation process, superfine nano calcium sulfate particles formed by the ammonium sulfate and the calcium hydroxide are prevented from growing up in a liquid-phase environment, so that industrial production of a superfine nano calcium sulfate product by adopting a chemical method becomes a possibility.

The invention discloses a SiOC porous ceramic supported La0.9K0.1CoO3 nano particle catalyst and a preparation method. SiOC porous ceramic is used as a carrier in the catalyst, and La0.9K0.1CoO3 nano particles are supported on the carrier. The preparation method comprises the following steps of: preparing the La0.9K0.1CoO3 nano particles by using lanthanum nitrate, potassium acetate, cobalt acetate and glucose; performing oleic acid packing and styrene emulsion polymerization reaction on the La0.9K0.1CoO3 nano particles to obtain modified La0.9K0.1CoO3 nano particles; preparing a catalyst precursor by using hydrogen containing polydimethylsiloxane (PHMS), 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane (D4Vi), methyl vinyl siloxane coordinated platinum catalyst and the modified La0.9K0.1CoO3 nano particles; and performing pyrolysis on the precursor to obtain the catalyst. The preparation process is simple; and the modified La0.9K0.1CoO3 nano particle catalyst has high mechanical strength, good chemical stability, high thermal stability and high chemical activity. The catalyst is particularly suitable for aftertreatment of diesel engine automobile tail gas.

The invention provides a method for preparing 4-tert-octylphenol. The C4 fraction addition mixture with 80 percent of isobutene dimer remained by esterification-degasification of sulfuric acid is taken as the raw material ; after the raw material is braized and cut under the temperature between 75 DEG C and 105 DEG C, the isobutene dimmer that the content of the target distillate is more than 98 percent is obtained to be taken as the alkylating agent; Na-type sulfonated styrol-butadiene polymer strong base anion-exchange resin with 50 percent of water is acidified to a H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the alkylation catalyst; the target distillate isobutene dimmer and the phenol are made a alkylation reaction under the temperature between 90 DEG C and 100 DEG C with the H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the catalyst to produce the 4-tert-octylphenol alkylation mixing liquid; the alkylation mixing liquid is braized and cut under the temperature between 220 DEG C and 270 DEG C to produce the 4-tert-octylphenol.

The invention discloses a flexible supercapacitor and a manufacturing method thereof, and belongs to the field of capacitors. The flexible supercapacitor comprises two layers of electrode material thin films spaced by an ion permeable membrane, and comprises electrolytes arranged between the two layers of the electrode material thin films and electric contacts arranged on the outer surfaces of the two layers of the electrode material thin films, wherein the two layers of the electrode material thin films are deposited on the surfaces of the ion permeable membrane by adopting a chemical depositing or blade coating or steeping method. The flexible supercapacitor is simple in manufacturing technology, low in cost and suitable for conducting polymer electrode materials and inorganic electrode materials.

The invention relates to a carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material and a preparation method thereof. The method comprises the following steps: (1) depositing a pyrolytic carbon matrix on the surface of carbon fibers contained in a carbon fiber preform to obtain a modified carbon fiber preform; (2) preparing a mixed resin solution of silicon powder, zirconium powder, graphite powder and phenolic resin in a mass ratio of (1-3): (4-6): 5: 100; (3) impregnating the modified carbon fiber preform with the mixed resin solution, and then sequentially carrying out curing and carbonization reactions on the impregnated modified carbon fiber preform, wherein the carbonization reaction is carried out in an inert atmosphere, the temperature of the carbonization reaction is 1650-1750 DEG C, and the time is 0.5-2 hours; and (4) repeating the step (3) at least once to obtain the composite material. According to the invention, silicon carbide and zirconium carbide can be uniformly distributed in the composite material, the content of free metals is reduced, and the oxidation resistance and ablation resistance of the material are improved.

The invention provides disposable degradable plant fiber tableware and a preparation method thereof. The disposable tableware is prepared from the following raw materials in parts by weight: 90-100 parts of plant fibers, 20-30 parts of polyvinyl alcohol, 10-15 parts of modified starch, 4-8 parts of modified calcium carbonate powder, 20-40 parts of waterproof glue and 6-10 parts of carboxymethylcellulose. The preparation method comprises the following steps: crushing, grinding, mixing and dissolving, forming, gluing, drying and disinfecting the components to obtain a product. The disposable degradable plant fiber tableware is non-toxic and harmless and clean and sanitary. The preparation process is environment-friendly and pollution-free. The disposable degradable plant fiber tableware is high in degrading speed in a spontaneous combustion environment, and can be recycled if being immersed into soil as a fertilizer for plants. The disposable degradable plant fiber tableware are easily available and cheap in source of raw materials and regenerative, agricultural resources are comprehensively utilized favorably, and meanwhile, the air pollution problem caused by crop straw combustionis also alleviated, and the white pollution problem caused by use of a plastic product in a large range can be also alleviated effectively.

The invention relates to an annular photonic crystal, and a preparation method and an application thereof. Emulsion containing mono-dispersed colloidal microspheres of same particle diameters and two emulsions containing mono-dispersed colloidal microspheres of different particle diameters or one of a plurality of emulsions containing mono-dispersed colloidal microspheres of different particle diameters are dispersed, sprayed or printed by jetting ink on the surface of a solid substrate and then dried; then, one or more residual emulsions containing mono-dispersed colloidal microspheres are dispersed, sprayed or printed by jetting ink successively; and then, the single-band-gap, double-band-gap or multi-band-gap annular opal structured photonic crystal, the photonic band gap of which is in the region of ultraviolet light, visible light or infrared light, can be obtained. An annular reverse opal structured photonic crystal can be prepared by taking the prepared annular opal structured photonic crystal as a sacrificial template. The preparation method is simple for operation and low in cost and is applied to preparing annular photonic crystals in a large scale. The prepared annular photonic crystal has important application in the fields, such as spectrometers, photonic crystal filters, reflected light sheets, tunable photonic crystal lasers and the like.

The invention discloses a preparation method of a porous cellulose acetate micropellet adsorbent. The preparation method comprises the following steps: extracting cellulose acetate in a waste cigarette end filter tip by virtue of a soxhlet extraction method, facilitating the reaction between the processed cellulose acetate and calcium carbonate in an acetone solution to obtain prototype cellulose acetate adsorbing micropellets, and then dispersing and molding the prototype cellulose acetate adsorbing micropellets by using an ultrasonic washer to obtain the cellulose acetate adsorption micropellet adsorbent. According to the preparation method of the porous cellulose acetate micropellet adsorbent, firstly the cellulose acetate is extracted from the cigarette end filter tip by virtue of the soxhlet exstraction method, then the porous cellulose acetate micropellet adsorbent is prepared by using a reverse-phase suspension dispersion method, and the prepared porous cellulose acetate micropellet adsorbent has good adsorption effect on heavy metal ions such as Fe<2+> and Cd<2+>. According to the preparation method, the raw material is likely to get, and waste is used, so that not only is the preparation cost of a product decreased, but also the environmental pollution caused by the waste cigarette end is reduced.

The invention relates to a method for preparing a semicylindrical minute groove by utilizing two-time film deposition and wet etching, which comprises the following steps of: depositing a film on a quartz substrate by adopting a conventional technology, coating a photoresist on the film, photoetching, developing and firming a mould; using a photoresist graph for shielding and isotropical characteristics of wet etching and using an etching solution to etch the film below the edge of the photoresist graph to form an air gap with certain width; depositing the film made of the same material on the surface of a structure obtained after the wet etching again and removing the photoresist to obtain a slit having the same width with the air gap; and then utilizing the film for shielding and carrying out isotropical etching on the quartz substrate by using a hydrofluoric acid buffer solution through the slit to obtain the semicylindrical minute groove. The slit with the width range of 700 nanometers to 2.5 microns can be prepared by the method without expensive equipment of electron beams, particle beams, dry etching and the like, and then the semicylindrical minute groove with the diameter width range of 700 nanometers to 2.5 microns and the depth range of 350 nanometers to 1.25 microns is obtained through controlling the condition of the wet etching.

The invention relates to a method using laser interference to induce electrochemical deposition so as to prepare periodic and patterned Fe3O4 nano particles. The method is characterized in that the light-induced dielectrophoresis and electrochemical deposition technologies are used, a laser interference light source is used as the induction light source, an ITO conductive substrate plated with hydrogenated amorphous silicon thin film is used as the working electrode, a saturated calomel electrode is used as the reference electrode, a high-purity iron sheet is used as the counter electrode, the mixed solution of FeCl2 and FeCl3 is used as the electrolyte, the induction light source is projected to the hydrogenated amorphous silicon thin film, and a photoelectric effect is used to allow an exposure part to generate a virtual electrode; chronoamperometry is used to perform electrochemical deposition on the virtual electrode to generate the Fe3O4 nano particles, and an ordered Fe3O4 nano particle array consistent with a laser interference pattern is obtained. The method has the advantages that the method is simple in equipment and low in preparation cost, high-temperature heating or annealing is not needed, used chemicals are nontoxic and harmless, and the prepared patterned ordered Fe3O4 nano particle array is good in reproducibility and stability.

The invention discloses a polyaniline-sulfonated graphene composite electrode material and a preparation method thereof. The preparation method comprises the following steps: fully mixing an aniline monomer with sulfonated graphene uniformly; performing in-situ polymerization to synthesize a polyaniline-sulfonated graphene composite material; doping with sulfuric acid; mixing the composite material, acetylene black and polyvinylidene fluoride; preparing N-methyl pyrrolidone as a solvent; coating slurry on a current collector stainless steel sheet for drying to obtain the composite electrode material. The preparation method is simple, rapid and environmentally-friendly in process. The prepared composite electrode material has the advantages of excellent rate performance, high circulation stability, high specific capacitance and the like, and is suitable for a super capacitor electrode material.

The invention discloses a preparation method of a high-temperature friction reducing and wear resistant composite cladding layer; first, a layer of Ni-TiN intermediate layer is plated on the surface of a metal matrix, and then a Ti-MoS2 lubrication cladding layer is prepared on the Ni-TiN intermediate layer. The method comprises the following steps: (1) the metal matrix surface is pre-treated; (2) the Ni-TiN intermediate layer is prepared on the metal matrix through a high-speed electrical spray-plating technology, washed and dried; (3) the Ti-MoS2 lubrication cladding layer is prepared on the Ni-TiN intermediate layer through the high-speed electrical spray-plating technology; (4) plasma arc is used to scan and strengthen the composite cladding layer. The high-temperature friction reducing and wear resistant composite cladding layer prepared by the method has obviously better performance than that of the prior high-temperature self-lubrication coating, the operation method is simple, the preparation cost is quite low and the industrialized production can be realized.

The invention discloses a white organic light emitting device with a single light emitting layer structure. According to the structure, the white organic light emitting device with the single light emitting layer structure is mainly composed of an ITO glass substrate, a hole transfer layer, an electron blocking layer, a light emitting layer, an electron transfer layer and a composite cathode, wherein the light emitting layer forms a single-layer light emitting layer through a subject-object doping system in a composite mode, subject materials forming the light emitting layer are mCPy, object materials forming the light emitting layer are excimer phosphorescence dye, the doping concentration of the object materials is between 8 wt% and 20 wt%, the light emitting layer can simultaneously emit blue light and red light, and the blue light and the red light are mixed to form white light. A triplet state energy level of the electron blocking layer and a triplet state energy level of the electron transfer layer are both higher than a triplet state energy level of the object materials of the light emitting layer, excition can be effectively bound in the light emitting layer, and an exicition binding structure is formed. The white organic light emitting device with the single light emitting layer structure has the advantages of being simple in structure and stable in chromaticity and efficiency.

The invention discloses a ZSM-5 molecular sieve used as a catalyst for synthesizing propylene from methanol and a preparation method thereof. The preparation method includes (1) weighing silica sol, adding deionized water to dilute, adjusting the pH value with an inorganic alkali solution, and dropping Add tetrapropylammonium bromide; (2) Add aluminum source dropwise, and then add inorganic acid solution to adjust the pH value; (3) Add high-pressure reaction axe, take it out after crystallization, wash and filter, and remove impurity ions; (4) Filter cake Drying and roasting can obtain the desired molecular sieve; this molecular sieve has the characteristics of controllable specific surface size, adjustable silicon-aluminum ratio and high dispersion, and has high propylene selectivity and good propylene/ The mass ratio of ethylene, the present invention also provides a catalyst for synthesizing propylene from methanol and a preparation method thereof, the catalyst prepared by the method has high propylene selectivity and P/E mass ratio, the catalyst does not need to add a binder, and the preparation process is simple, The preparation cost of the catalyst is effectively reduced.