616results about How to "Not easy to gather" patented technology

The invention provides waterborne digital ink-jet printing sublimation ink and a preparation method thereof. The ink comprises the following components in percentage by mass: 1 to 10 percent of disperse dye, 2 to 15 percent of dispersing agent, 10 to 60 percent of deionized water, 10 to 50 percent of water soluble organic solvent, 0.1 to 5 percent of surface active agent, 0.05 to 0.5 percent of germicide, and 0.05 to 0.5 percent of defoaming agent. The preparation method comprises the following steps of: mixing 1 to 20 percent of dispersing agent, 10 to 40 percent of water soluble organic solvent, 0.1 to 2 percent of germicide, 0.1 to 2 percent of defoaming agent, and 30 to 50 percent of deionized water, adding 1 to 20 percent of disperse dye while stirring, and grinding the mixed solution to obtain color paste; uniformly mixing 15 to 50 percent of color paste, 10 to 30 percent of water soluble organic solvent, 0.1 to 5 percent of surface active agent and 20 to 50 percent of deionized water and filtering the mixed solution to obtain the waterborne digital ink-jet printing sublimation ink. When the waterborne digital ink-jet printing sublimation ink is used in a large-sized ink-jet printer using waterborne ink, the good printing smoothness and the water retention of a printing head are achieved, and the preparation process is simple.

The invention relates to a fabric deoiling agent, in particular to a fabric one-bath deoiling agent not only suitable for the single deoiling treatment of fabrics, such as terylene, chinlon, cotton, and the like, but also particularly suitable for treating chemical fiber fabrics, such as the terylene, the chinlon, and the like by a deoiling dyeing one-bath method. The invention provides the fabric one-bath deoiling agent with favorable deoiling effect under acidic conditions and an application thereof. The fabric one-bath deoiling agent comprises the following ingredients in percentage by weight: 10-60 polyoxyethylene alkyl amine, 5-40 alkyl sulfonate, 10-50 sulfate surface active agent or / and phosphate salt surface active agent and the balance of water. The fabric one-bath deoiling agent can be used for treating the fabrics of the terylene, the chinlon, the cotton, and the like by the deoiling dyeing one-bath method.

The preparation process of catalyst material containing nano molecular sieve includes: mixing acid silicon and / or alumina sol with pH 1-4 and containing SiO2 and / or Al2O3 10-50 wt% and molecular sieve slurry with pH 9-14 and containing nanometer molecular sieve 10-50 wt% in the weight ratio between SiO2 and / or Al2O3 to molecular sieve of 0.2-2; forming the mixture of pH 7-9.5 into gel; and dryingand crushing or shaping the gel.

The invention relates to a method for preparing a core-shell structure metal / polymer nanofiber membrane. The prepared fiber membrane uses a polymer as a nuclear layer and uses a nano-metal as a shell layer; the polymer can be polyvinyl pyrrolidone, polyvinyl alcohol, polyoxyethylene, polylactic acid, polyacrylonitrile, hyaluronic acid, chitosan and the like; the nano-metal shell layer comes from metal salt silver nitrate or copper chloride. The core-shell structure metal / polymer nanofiber is prepared by utilizing the electrospinning technique; by controlling the process parameters, the concentration of polymer, the content of metal salt and the proportioning of solvents, the metal / polymer nanofiber membrane is prepared; the fiber membrane has high application value on tissue engineering, recovery of wound, drug transportation, photoelectricity and the like.

The invention provides a preparation method of a composite catalytic material for nanometer molecular sieve or silicon and aluminum oxides, which is characterized in that the method comprises the steps that: firstly, the nanometer molecular sieve is synthesized with directing agent, of which the depositing and dissolving process is treated with microwave and / or ultrasonic, then the serum containing the nanometer molecular sieve is added with a mixed aqueous solution of water glass and aluminum sources and then PH is adjusted to 7 to 9.5 by adding acid to form a gel. The composite catalyst material is obtained after dying and baking the gel. The aluminum source is selected from sodium metaaluminate or aluminium sulphate. The method keeps granule of the molecular sieve product smaller than 100nm and the nanometer molecular sieve thereof is resistant to aggregation. The method is free from acid sol process so that the molecular sieve is not destroyed by acid. The composite material is suitable for catalytic cracking and hydrocracking reactions of large molecules of heavy oils.

The invention discloses a preparation method of a nano-silver alginate fiber. The preparation method comprises the following steps of: preparing an alginic acid silver complex which is a precursor of nano-silver by using algal polysaccharides and soluble silver salts, and then preparing a sodium alginate based nano-silver colloid system through a chemical reduction method; then adding fiber-grade sodium alginate into the sodium alginate based nano-silver colloid system to obtain a nano-silver algae spinning solution; and finally, obtaining a nano-silver algae primary fiber through wet spinning, and carrying out stretching, sizing, drying and oiling treatments to obtain the nano-silver alginate fiber. The prepared nano-silver alginate fiber integrates the excellent performances of the nano-silver and the alginate fiber, so that the novel fiber has excellent flame retardance, biocompatibility, moisture absorption permeability and the like, also has excellent antimicrobial performance, antistatic performance and irradiation resistance and can be widely used in medical treatment, the fire-fighting field, the military field, the aerospace field, the health textile field and the like.

The invention relates to a platinum-tin catalyst of low-carbon alkane dehydrogenation and a preparation method thereof, and mainly solves the problem that in the prior art, in high temperature and carbon burning processes of a catalyst, metal platinum particles are easy to coalesce to grow up to affect the stability of the catalyst. According to the platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof, a technical scheme is adopted to well solve the problem, the technical scheme is shown as follows: first introducing assistants of alkalinous metals such as calcium, magnesium and the like into an alumina carrier by a coprecipitation method to get a compound metal oxide carrier, then using a dipping method to load tin and platinum components, namely dipping an aqueous solution of soluble salts of the platinum and tin components, and thus obtaining the platinum-tin catalyst by drying, roasting and water vapor treatment. The platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof can be used in industrial preparation of the catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation.

The invention discloses a novel electromagnetic shielding nanocarbon conductive fibrous material and a preparation method thereof, and belongs to the field of a nano-material technology. The material comprises the following components: graphite, a nanometer carbon fiber, a conductive polymer, a polymer adhesive, a dispersant, alkali metal fluoride, a metal catalyst, a conductive metal and a surface conditioning agent. The preparation method comprises the following steps: the graphite is subjected to pretreatment with alkali metal fluoride; the nanometer carbon fiber is oxidized by an acid mixture, the surface conditioning agent and the conductive metal are added separately, and a heating treatment is carried out; after the pretreated graphite and the pretreated nanometer carbon fiber are dissolved, the dispersant, the conductive polymer and the polymer adhesive are added for blending, and ultrasonic dispersion, ozonization treatment and grinding are carried out to form a homogeneous solution; a chemical blend is blended with the obtained solution, and the nanocarbon conductive fibrous material is prepared by a electrostatic spinning method. The novel electromagnetic shielding nanocarbon conductive fibrous material prepared by the invention has good electromagnetic shielding performance, and does not have toxicity and any carcinogenic substances; the novel electromagnetic shielding nanocarbon conductive fibrous material can be used for manufacturing radiation-proof clothes and the like.

The invention provides a two-dimensional nanosheet and a preparation method and usage thereof. Through a means of solution stripping, the two-dimensional nanosheet which is large in sheet layer size,high in quality and small in defect number and mainly takes a single layer is prepared. The morphology of the two-dimensional nanosheet is represented through an optical microscope, a scanning electron microscope, a transmission electron microscope and an atomic force microscope. A Raman spectrum is utilized to represent that the two-dimensional nanosheet obtained through solution stripping and atwo-dimensional nanosheet obtained through a chemical vapor deposition method have the equally high crystalline quality. An infrared transmittance spectrum is utilized to represent successful modification of organic matter to the two-dimensional nanosheet. Research results show that the two-dimensional nanosheet synthesized through the preparation method has the advantages of being large in size,high in quality, small in defect number, easy to modify and the like.

The invention relates to a light gauge aluminum foil woolen produced with AL-Ti-C wire refiner and a preparation method. The iron-silicon rate of the woolen ranges between 4.3-5.3. The process of the preparation technology is sequentially as follows: material preparation, batching, feeding, melting, stirring, primary refining of a smelting furnace, drossing, sampling, ingredient adjustment, secondary refining of the smelting surface, drossing, converter, primary refining in a holding furnace, intensified refining in the holding furnace, online addition of AL-Ti-C wire intermediate alloy refiner, Ar online degassing, filtration, continuous casting into 7.0-7.5mm cast rolling plates, cold rolling, high-temperature homogenizing annealing of a primary sheet strap, cold rolling, trimming of a rereeling machine, cold rolling, intermediate annealing of a secondary sheet strap, cold rolling to 0.26-0.32mm, trimming of the rereeling machine, and packaging. The cost is low, the quality is stable, the calendaring of the aluminum foil and grain refining are good in effect, and the probability of generating pinholes is low during production.

A tin stripping waste liquid treating method comprises the following steps: adding sulfate into a tin stripping waste liquid, adjusting the pH value to be 1.0-1.5, then adding a polyacrylamide flocculating agent to recycle tin, adding ammonia water with the concentration of 18-25% into copper-containing wastewater, conducting neutralization to recycle copper, and conducting further treatment on the wastewater. According to the method, sulfate is added into the tin stripping waste liquid, so that the effect of tin hydroxide colloid coagulation is achieved, and the usage amount is ammonia water can also be reduced; in the neutralization process, a certain amount of the PAM (polyacrylamide) flocculating agent is added, so that metallic tin is precipitated in the form of tin hydroxide; under the acidic condition, most metallic copper dissociates in a supernatant in the form of copper ions, the tin hydroxide is obtained through solid-liquid separation, and the filtrate is subjected to neutralization, so that copper in the filtrate is precipitated in the form of copper hydroxide, and the copper hydroxide is subjected to solid-liquid separation through a filter press, that is, in different acidity and alkalinity systems, the forms of metal ions are different, so that the metal ions are separated, tin and copper in the tin stripping waste liquid can be recycled in steps, and the resources in the tin stripping waste liquid can be fully utilized.

The embodiment of the invention discloses a liquid crystal display device, and belongs to the technical field of liquid crystal display. The liquid crystal display device comprises an array substrate, a color filer substrate, a printed circuit board and a flexible circuit board. The color filter substrate is arranged opposite to the array substrate, and the array substrate comprises a plurality of first public electrodes and a first public electrode connecting wire. The color filter substrate comprises a second public electrode, the printed circuit board comprises a first resistor, a second resistor and a chip, the printed circuit board is connected with the array substrate through the flexible circuit board, the chip provides a first public voltage for the first public electrodes through the first resistor and the flexible circuit board, and the chip provides a second public voltage for the second public electrode through the second resistor and the flexible circuit board. The picture incidental image condition of the liquid crystal display device can be avoided, and the display quality of the liquid crystal device can be improved.

The invention discloses a method for preparing grapheme through organic amine solvothermal method, which comprises the following steps: 1) adopting the solvothermal method to lead expanded graphite to react with organic amine or organic amine solvent to obtain the semi-discrete liquid of grapheme; 2) implementing ultrasonic dispersion and then implementing centrifugation on the semi-discrete liquid of grapheme obtained from the step 1), and then collecting supernate, thus obtaining the grapheme. The invention obtains the grapheme by taking solvent thermal spalling as a means. A scanning electron microscope, a transmission electron microscope, and an atomic force microscope are adopted to represent the topogram of the grapheme; a Raman spectrum and an X-ray photoelectron spectroscopy are used to represent the density of imperfection and oxidation situation of the grapheme. The result shows that the grapheme synthesized by the method of the invention has the advantages of small size, high quality, less defects, light oxidation degree, etc. besides, the method for preparing grapheme through organic amine solvothermal method also has the advantages of simple synthetic route, low cost, high concentration and uneasy accumulation of the synthesized discrete liquid of grapheme, and excellent application prospect on the aspect of discrete liquid of grapheme materials.

The invention discloses several non-peripherial substituted phthalocyanine metal complexes and making method, which introduces functional group into position a (position 1(4), 8(11), 15(18) and 22(25)) of phthalocyanine complex.

The invention discloses a heat radiation structure of a circuit module and an outdoor unit of a variable-frequency air conditioner. The heat radiation structure comprises a circuit board (1), a mounting support (2), electronic devices (3) and a heat radiator (4), wherein the electronic devices penetrate one side of the mounting support to be connected with a circuit board on the other side, and the heat radiator is abutted against the surfaces of the electronic devices; a zigzag structure (21) used for reducing mutual contact area is formed on the contact surface between the circuit board and the mounting support. Furthermore, the heat radiation structure comprises an electric control box (5), various parts are sequentially stacked in the electric control box, the heat radiator extends out of the electric control box, and an air inlet passage (7) facing the heat radiator is formed on the electric control box. The heat radiation structure is mounted in a case (9) via the electric control box and close to an air wheel (12) of the outdoor unit. With the zigzag structure, water accumulation is well prevented; with the mounting structure and the air passage, heat radiation effect of the heat radiator is well improved so as to radiate heat on the surface of the circuit board.

The invention discloses a nucleic acid detection method based on the polymer electrochemiluminescence signal amplification technology. The method comprises the following steps: synthesizing and activating ruthenium terpyridine, preparing a polylysine-ruthenium terpyridine compound, marking the polylysine-ruthenium terpyridine compound with a DNA (deoxyribonucleic acid) probe, and magnetically capturing and detecting a target DNA sequence. According to the method, the polymer electrochemiluminescence signal amplification technology is applied to nucleic acid detection, and an organic polymer such as polylysine is good in physical and chemical properties and can be applied to the field of electrochemiluminescence signal amplification; polylysine is adopted as a connecting framework for ruthenium terpyridine signal amplification, and the system is stable, hard to aggregate and easy to store; the polylysine-ruthenium terpyridine compound marked with the DNA probe is stable in properties and convenient to modify and store. The method is easy in operation, quick, stable and controllable, is suitable for nucleic acid detection and can serve as an antibody labeling method in immunoassay to improve the sensitivity.

The invention discloses a self-emulsifying molecular antifoaming agent and a preparation method thereof. The antifoaming agent comprises the following components in percent by mass: 20 to 60 percent of antifoaming active substance and 40 to 80 percent of dispersion medium, wherein the antifoaming active substance consists of higher fatty alcohol, alkynol, polyether and silicone oil in a mass ratio of 1:(0.8-1.5):(2-3):(2-4); and the dispersion medium is grafted star polymer. The preparation method comprises the following steps of: adding 50 to 150 parts of trichloromethane and 1 to 2 parts ofp-methyl benzene sulfonic chloride into 20 to 60 mass parts of active substance and 40 to 80 mass parts of star polymer, raising the temperature to between 40 and 70 DEG C, and reacting for 3 to 6 hours; and after the reaction is finished, washing sodium carbonate until the ph is 7, drying by using anhydrous sodium sulfate, and evaporating the solvent under reduced pressure to obtain the antifoaming agent. The extended arm of the star polymer in the antifoaming agent is grafted with the active substance, so that various components are synergistic, and the obtained antifoaming agent is high instability, low in surface tension, high in surface activity, high in antifoaming capacity, long in foam inhibition time and small in dosage.

A viewing window of electromagnetic shielding is composed of single layer or multiple layer of metal wire mesh, single layer or multiple layer of optical film in quantum well structure and transparent backing material as each layer of metal wire mesh is fabricated by metal thin wire flared-out in single set or multiple set, any two pieces of thin wires in each set of metal thin wire will be in the same plane as parallel to each other; optical film will be metal dielectric media multilayer film contained single layer of metal film or multiple layer of metal film and it is structured by inducible layer which consists of two layer of different transparent media films laid at two sides symmetrically and functional layer which will be compounded in between the inducible layers laid symmetrically as well as it will be embedded on the surface of microwave cavity to be closely compounded with the microwave cavity.

The invention relates to a method for preparing a nanometer material mixed matrix membrane, which comprises two steps: 1, a micropore intermediate layer implanted with nanometer materials is prepared; and 2, a filter cortex is prepared on the surface of the micropore intermediate layer implanted with the nanometer materials. According to the method disclosed by the invention, the nanometer materials on the membrane surface have high firmness, and do not drop easily in an application process, and the nanometer materials are uniformly distributed on the membrane surface and are not gathered easily. In addition, the coverage rate of the nanometer materials on the membrane surface is easy to control, so that the functions of the nanometer materials can be fully exerted, and harms on the filtering performance of the membrane can not be caused.

The present invention belongs to the field of superfine powder preparing technology and proposes one new kind of superfine powder preparing method and apparatus. Super high pressure technology, supercritical fluid technology and micro jet crushing technology are combined and used in preparing submicron level superfine powder. The new method needs no grinding medium and solvent, and has high energy utilization and easy separation between the product and the work medium.

The invention relates to a biological nanometer magnetic target anti-cancer drug, which is formed by coupled biological nanometer magnetic smalls and anti-cancer chemical drug. Wherein, the biological nanometer magnetic small is nanometer magnetic particle formed in magnetic bacterial cell, at 35-120nm diameter, while its main component is Fe3O4 or Fe3S4; single magnetic particle is packed by film; and the coupled anti-cancer chemical drug comprises chemotherapy drug, nucleic acid drug, radioactive nuclide or antibody drug. The invention also provides relative production that using physical adsorption couple or based on the active function group contained by smalls and anti-cancer drug, to select right coupler via chemical reaction to couple them. And the smalls has better bioavailability, less side effect, therefore, the anti-cancer drug can be accurately transmitted to ill part via external magnetic field, to reduce the contact between drug and normal organism., to realize target positioning treatment.

The present invention provides several application of non-peripheral substituted phthalocyanine metal coordination compound. The invented phthalocyanine metal coordination compound has the application for preparing photosensitive medicine preparation which can be used in photodynamic therapy or photodynamic diagnosis, and has the application for preparing photosensitizer which can be used in photodynamic purification or disinfection. Besides, it can be used as fluorescence probe or can be used for determining protein content.

The invention provides a preparation method of a glucocorticoid aerosol inhalation suspension. The method comprises the following steps: (1) preparation of a mixed liquid, namely dispersing glucocorticoid into a water solution, and obtaining a mixed liquid containing a glucocorticoid insoluble medicine; and (2) high-pressure homogenization, namely homogenizing the mixed liquid through a high-pressure homogenizer until the particle size distribution is d(v, 0.5)=1-3 microns, so as to obtain the suspension. The preparation method also can comprise the steps of filling and sterilizing; the finally obtained glucocorticoid aerosol inhalation suspension comprises glucocorticoid and a water solution; the particle size distribution is d(v, 0.5)=1-3 microns; and the components also can comprise medicinal additives including a pH modifier, a suspending agent, a wetting agent and an isoosmotic adjusting agent. By virtue of a high-pressure homogenization crushing method, all defects of an airflow crushing method can be effectively solved; and the obtained product is relatively good in appearance, and is free of instability phenomena such as FPF and FPD reduction.

The invention provides a metal mold casting coating for an aluminum alloy thin-walled piece. The coating is prepared from refractory aggregate, adhesive and carrier liquid, wherein the refractory aggregate contains kieselguhr, corundum powder, titanium dioxide and asbestos powder; the adhesive is silica sol or anhydrous phosphate; the carrier liquid is industrial alcohol; and the coating comprises the following components in part by weight: 0.5 to 1 part of kieselguhr, 0.5 to 1 part of corundum powder, 1.5 to 3.5 parts of titanium dioxide, 3 to 7 parts of asbestos powder, 0.6 to 1 part of silica sol or anhydrous phosphate, and 20 to 60 parts of industrial alcohol. The invention also provides a preparation method for the coating; the method comprises the following steps of: putting the refractory aggregate and the adhesive into a container with proper size, stirring the refractory aggregate and the adhesive uniformly through manpower or a machine, pouring the industrial alcohol into the container, and stirring uniformly for later use. The invention finally relates to a coating method of the coating. When the coating is used, the temperature of a die is between 180 and 400 DEG C, and a coating with the thickness of 0.1 to 0.5 millimeter is coated on the surface of the die.

The invention relates to liquid-state lipid micro-particles used for delivering a cerebric medicine through a nose olfactory pathway, a preparation method thereof, and a preparation thereof. The liquid-state lipid micro-particles at least comprise a medicine, a lipid material, a penetrating agent, hydroxyethyl starch, propylene glycol and water. The mass ratio of the medicine to the lipid material is 1:1 to 1:10. The volume ratio of propylene glycol to water is 2:1 to 1:10. The liquid-state lipid micro-particles are advantaged in large drug load, high deformation capacity, simple preparation method, and high entrapment rate. The micro-particles are beneficial for the medicine to be delivered into the brain through the nose olfactory pathway and to provide curative effects. The range of appropriate medicines of the liquid-state lipid micro-particles is large, and the liquid-state lipid micro-particles are especially suitable for hormone, polypeptide, gene or vaccine medicines. With the liquid-state lipid micro-particles, preparations such as aerosols, nasal drops, and gels can be produced, such that requirements of cerebric disease medication can be satisfied.

The invention belongs to the technical field of materials, and relates to an ultra-high-strength heat-resistant gear bearing steel with ultra-hardened surface layer and a preparation method thereof. The chemical composition of the steel comprises the following chemical components of, in percentage by mass, 0.08-0.18% of C, 10.0-16.0% of Co, 3.0-8.0% of Ni, 3.0-7.0% of Cr, 3.0-6.0% of Mo, 0.5-2.0%of W, 0.2-1.0% of V, 0-0.1% of Nb, and the balance Fe and impurity elements. According to the method, vacuum induction melting, vacuum induction melting and vacuum arc remelting or vacuum induction melting and electroslag remelting are adopted for smelting. Steel ingots are diffusion annealed and forged into steel products. Steel samples are subjected to preliminary heat treatment, carburization and final heat treatment, the tensile strength of the steel is not less than 1900 MP a, the yield strength is not less than 1600 MP a, and the carburized surface hardness is not less than 850 HV (equivalent to 66 HRC). The method has the advantages that compared with the prior art, the method has higher tensile strength, yield strength and relatively good plasticity, toughness and heat resistance,has excellent surface carburization super-hardening performance and fatigue performance, and achieves good matching of the core super-toughening and surface super-hardening.

The invention provides a cystatin C detection kit and a preparation method thereof. The kit comprises a reagent R1, a reagent R2 and a cystatin C calibration product, wherein the reagent R1 comprisesa preservative, a surfactant, an emulsifier and a buffer solution; the reagent R2 comprises a cystatin C antibody, polystyrene latex microspheres, a latex microsphere activating agent, a sealing agent, an emulsifier, a preservative, a surfactant and a buffer solution. The cystatin C antibody is slowly dropwise added to an activated polystyrene latex microsphere solution, a polystyrene latex microsphere suspension coupled with the cystatin C antibody is obtained after a stirring reaction, sealing is performed, the antibody and latex microspheres are coupled together in a chemical crosslinking manner, and centrifugation, cleaning and ultrasonic resuspension processes in conventional methods are omitted. The production process is simplified, and the kit has the advantages of low blank absorbency, high sensitivity and precision and large linear range.

The invention relates to a polymer catalytic membrane containing a palladium metal activity functional layer prepared based on the technology of layer-by-layer self assembly and a preparation method thereof, which belongs to the field of catalytic membranes. According to the invention, polyacrylonitrile (PAN) powder, polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP) are dissolved in N,N-dimethyl formamide (DMF), and a PAN flat base membrane is prepared by using a phase inversion process; then the PAN membrane is soaked in a NaOH solution for treatment, which allows surface of the membrane to hydrolyze so as to produce carboxyl groups, thereby enabling the surface of the membrane to carry negative electric charges; a polyethyleneimine (PEI) solution and a potassium chloropalladate K2PdCl4 solution are fully mixed and react for a certain period of time so as to obtain a coordination compound of polyethyleneimine-palladium (PEI-Pd(II)); the treated flat base membrane is alternatively soaked in a solution containing the PEI-Pd(II) coordination compound and a polystyrene sulfonate (PSS) solution for self-assembly of functional layers on the surface of the membrane, and the amount of the assembled layers is controlled; and finally, the membrane obtained after assembly is soaked in a potassium borohydride KBH4 solution, Pd(II) is reduced to be Pd0, and the PAN catalytic membrane containing the palladium metal particle active layer is prepared.

The invention provides a corrosion-resistance coating of a polysilicon ingot furnace, a high temperature resistance protective layer and a preparation method thereof. The corrosion-resistance coating comprises the following components with the weight percentage: 85%-93% of mixture of carbon fibre powder and graphite powder, 1%-4% of film forming agent, 1%-3% of mixture of firming agent and dispersing agent, and 5%-12% of insulating material powder; the insulating material powder is one or two compounds of Sr3Ti2O7 and Sr4Ti3O7. The high temperature resistance protective layer comprises a carbon fibre thermal-protective coating and the corrosion-resistance coating covered on thereof. The corrosion-resistance coating of the invention causes the surface of the carbon fibre thermal-protective coating to be smooth, blocks the aggregation of impurities, has high temperature resistance and high strength, protects the carbon fibre thermal-protective coating not to be rusted, thus prolonging the service life of the carbon fibre thermal-protective coating.

The invention relates to selenium nano-particles and a preparation method thereof, in particular to amorphous selenium nano-particles with the grain diameter being 1-300 nm and a preparation method of the selenium nano-particles. The preparation method of the selenium nano-particles includes the steps that selenium combined macromolecules, a selenium source and a reducing agent or an oxidizing agent are subjected to a mixed reaction in a water phase medium, and nano-particles with the grain diameter being 1-300 nm are prepared; the selenium combined macromolecules are selected from water-soluble protein, water-soluble cellulose and water-soluble pectin and a combination of water-soluble protein, water-soluble cellulose and water-soluble pectin. According to the technical scheme, the nano selenium particles can be well stabilized, the nano selenium particles are not easily gathered into micron fine particles or larger selenium particles, and it is guaranteed that the nano selenium particles have good bioavailability and a good biological effect.