165results about How to "The equipment process is simple" patented technology

The invention discloses a C/C composite material superhigh temperature ceramic coating, and a preparation method thereof. The C/C composite material superhigh temperature ceramic coating is composed of an anti-oxidation SiC transition internal layer and a superhigh temperature ablation-resistant ceramic external layer; the superhigh temperature ablation-resistant ceramic external layer is composedof more than one ingredients selected from SiC, ZrC, HfC, TaC, TiC, ZrB2, HfB2, TaB2, and TiB2. The preparation method is suitable for industrialized production, is simple in equipment, is convenientin operation, is capable of controlling coating thickness, satisfying preparation requirements of large size C/C composite material superhigh temperature ceramic coating with complex shapes, and is asuperhigh temperature ceramic coating preparation method with excellent development potential.

The invention discloses a high effect formaldehyde dispelling agent. The formaldehyde dispelling agent of the invention comprises formaldehyde dispelling factors, a stabilizing agent, a synergistic agent, surfactants and water, etc. The product is nonpoisonous and tasteless, safe and environmental friendly, which can quickly and thoroughly dispel free formaldehyde in air, waste water and various boards and furniture, and a dense protecting film is formed on the surface of solid, working for a long time. The method of the invention is characterized by simple production technique and devices, no three wastes pollution and low production cost.

The invention discloses laminated ferroelectric/magnetic multiferroic and magnetoelectric composite film and preparation method thereof. The film comprises a substrate, a ferroelectric oxide layer and a magnetic oxide layer, and also a buffer layer positioned between the substrate layer and the ferroelectric oxide layer or the magnetic oxide layer. The layer can be LaNiO3, YBa2Cu3O7-x or SrRuO3, among which LaNiO3 is preferred. The preparation method comprises the following steps: firstly, buffer layer sol is prepared; secondly, the buffer layer sol is uniformly coated on the substrate to obtain the buffer layer; thirdly, sol of the ferroelectric oxide layer and the magnetic oxide layer is respectively prepared; fourthly, the sol obtained in step 3 is coated on the buffer layer, and then the end product is obtained. After the composite film is introduced into the buffer layer, the stress restraint of the substrate to the composite film is effectively reduced, the magnetoelectric coupling performance of the composite film with laminated structure is obviously enhanced, the cost is reduced, the preparation technique is simple, the requirement on the equipment is low, and the compatibility with the prior technique is good.

The invention relates to a carbon-coated nickel-aluminium composite material and a preparation method and application thereof. The carbon-coated nickel-aluminium composite material is in a particle shape and comprises a nickel-aluminium inner core and a graphite shell covering the outer surface of the nickel-aluminium inner core. The nickel-aluminium inner core comprises elemental nickel, nickel oxides and aluminium oxides. The composite material comprises, by weight percent, 1-8% of graphite, 45-55% of the elemental nickel, 20-30% of nickel oxides and 15-34% of aluminium oxides. The carbon-coated nickel-aluminium composite material prepared through the preparation method can completely oxidize butane in industrial waste gas under a low temperature, and very good industrial application prospects are achieved.

The invention discloses a polylactic acid-based composite material surgical medical film and a preparation method thereof. By adopting electrostatic spinning equipment and exploring proper technological parameters, different types of polylactic acid-based composite material macromolecular fiber thin films are finally formed and are applied to the field of biomedicine. In addition, by regulating and controlling composition of a macromolecular composite material system and thickness of an electro-spinning thin film, the surgical medical film which has good flexibility, high tensile strength, controllable degradation rate as well as excellent waterproof, antibacterial and air permeable performances is obtained finally. The surgical medical film is applicable to the field of various biomedicines such as healing film, wound surface dressing and anti-adhesion medicine; the medical film not only can be better adhered to tissues and avoid biotoxicity, but also can effectively promote transmission functions of blood, nutrients and growth factors in a human body due to the nature of semipermeable membrane. The process of the invention is simple and environment-friendly; the preparation method is easy to operate, low in cost, applicable to large-scale production and good in controllability, and is expected to be widely applied to various medical fields.

The invention provides a novel formaldehyde scavenging agent which has high formaldehyde scavenging efficiency, durable action effect and simple production process, and can effectively scavenge formaldehyde from indoor air and simultaneously reduce the formaldehyde release amount of the decoration materials. The formaldehyde scavenging agent is characterized in that: the product is prepared from the following raw materials according to a weight ratio: 2-60% of formaldehyde scavenging factor, 1-10% of film forming agent, 1-10% of film forming aid and 40-80% of water. The formaldehyde scavenging agent is aqueous, can be sprayed to indoor air, wall or furniture, has high formaldehyde capturing rate and is convenient for use.

A preparation method of aromatic hydrocarbons and low-carbon olefins through co-processing animal and plant oil and an oxygenated chemical is characterized by: introducing raw materials such as the plant oil and the oxygenated chemical into a catalytic cracking reactor; carrying out a catalytic conversion reaction through contacting with a catalytic cracking catalyst in the reactor with an operating temperature of 500 to 670 DEG C, an operating pressure of 0.1 to 5.0 MPa, a weight hourly space velocity of 0.1 to 100 h<-1> and an agent-oil ratio of 1 to 50; separating a reaction oil gas from the spent catalyst when the reaction is finished; recycling the separated spent catalyst after stripping, burning and regenerating; obtaining fractions such as a liquefied gas, gasoline and the like through fractionating the reaction oil gas and obtaining the low-carbon olefins through a manner that the liquefied gas enters a gas separating system; and obtaining the aromatic hydrocarbon product through carrying out a further aromatic extraction on the gasoline fraction. The method provided by the present invention allows the reaction temperature to be controlled through co-processing the plant oil and the oxygenated chemical, the selectivity of the target product gasoline to be improved, and energy consumption to be reduced. In terms of a reaction apparatus, equipment flow is simplified because heat exchangers which are arranged for removing reaction heat can be reduced.

The invention discloses a preparation method of an oil-water separation mesh film with super-hydrophilicity and super-lipophobicity. The method comprises the steps that a metal net with the mesh size being 400-2,000 is adopted as a substrate, a cold spraying method is adopted, net wires of the metal net are coated with hydrophilic materials in a spraying mode, the hydrophilic materials are one or more of zinc oxide, silicon dioxide, calcium carbonate and titanium dioxide, and the grain size range is 5-200 nanometers; finally sintering is performed under the temperature of 300-750 DEG C for 60-240 min, and the oil-water separation mesh film with super-hydrophilicity and super-lipophobicity is obtained. The metal net does not need to be modified, the binding force is improved with no adhesive, no secondary pollution is generated, cleaning is easy, and the mesh film can be repeatedly used.

The invention discloses a preparing method of a potassium sodium niobate (KNN) piezoelectric nanofiber flexible electricity generating element. According to the method, the preparation of a KNN precursor is provided; KNN nanofiber is prepared in a large area by an electrostatic spinning method; and the KNN nanofiber transfer and the device assembly are carried out, and the KNN piezoelectric nanofiber flexible electricity generating element is obtained. The preparing method has the advantages that excellent lead-free piezoelectric materials are adopted; the KNN nanofiber is used for forming the flexible piezoelectric electricity generating element; the element can be enabled to have high electric output; the length-diameter ratio of the nanofiber prepared by the electrostatic spinning method is high; the nanofiber crystallization can be realized through sintering treatment; equipment and preparation processes are simple; the cost is low; the preparing method can be used for batch production of the elements; the mechanical deformation of the nanofiber under the specific external force effect can be improved through good flexibility of the element; and the collection efficient of the element on mechanical energy is improved.

The invention discloses a recycling process of tin-removing waste liquid. The method includes the steps of S1, feeding the tin-removing waste liquid into a distilling device, and performing pressure reduction distillation under the temperature of 65-80 DEG C and the pressure of (0.2-0.5)*1.03*10<5>Pa to recycle nitric acid; S2, feeding distillation residual liquid into an electrolytic tank with an ion exchange membrane for electrolysis, controlling current density and cathode potential to recycle copper in the residual liquid through electrolysis, acquiring tin dioxide at the anode of the electrolytic tank, and acquiring metal copper at the cathode of the electrolytic tank; S3, controlling current density to be unchanged after metal copper is recycled, and changing cathode potential to recycle tin through electrolysis, constantly adding sulfuric acid solution in a cathode chamber during the electrolysis process until the electrolysis is ended, acquiring the tin dioxide at the anode of the electrolytic tank, and acquiring metal tin at the cathode of the electrolytic tank, wherein the current density is 100-200A/m<2>. The recycling process has the advantages that no chemical reagent is added, and secondary pollution is avoided.

The present invention relates to a method for preparing single-phase BiFeO3 ceramic by utilizing quenching process. It is characterized by quickly cooling sintered BiFeO3 ceramic. Said method includes the following steps: weighing Bi2O3 powder and Fe2O3 powder according to the mole ratio of 1:1, ball-grinding for 4-12 hr according to 100-500 rpm, uniformly mixing two powdes, drying the above-mentioned mixed powder, pressing the mixed powder into thin sheet, then placing proper quantity of the above-mentioned mixed powder into Al2O3 crucible, placing the thin sheet into the crucible, and using correspondent powder to cover the thin shet to make the thin sheet and powder be in sealed state, then placing the above-mentioned crucible into heating furnace, heating to sintering temperature, heating speed is 2-8 deg.C/min, sintering temperature is 830-920 deg.C and sintering time is 30-60 min., after sintering process is completed, promptly quenching so as to obtain the invented product.

Belonging to the technical field of semiconductor film preparation, the invention relates to a preparation method and application of a Cu2ZnSnS4/graphene composite semiconductor film. The preparation method includes: taking ethanol as the solvent, using a cupric chloride hydrate as the copper source, zinc chloride as the zinc source, stannous chloride as the tin source, and thiourea as the sulfur source, and adopting cetyl trimethylammonium bromide (CTAB) as the surfactant to prepare a reaction precursor solution; putting a cleaned FTO glass conductive surface up, adding an ethylene glycol solution of graphene dropwise, putting the FTO glass into a drying box to conduct drying, then putting the FTO glass conductive surface up into a high pressure reaction kettle lining, pouring the prepared reaction precursor solution into the high pressure reaction kettle lining, performing sealing, then putting the high pressure reaction kettle into a blasting drying box, and carrying out constant temperature reaction so as to obtain a Cu2ZnSnS4/graphene composite semiconductor film on the FTO conductive glass substrate. The method provided by the invention has a simple process and is low in cost. The prepared Cu2ZnSnS4/graphene composite semiconductor film has good application effect, can be directly used a counter electrode of a dye-sensitized solar cell, and also can be used as an absorption layer of a copper-based film solar cell.

The invention belongs to a process for preparing white carbon black and in particular relates to a process for producing precipitated white carbon black by silicon tetrachloride. The process comprises the following steps: adding the silicon tetrachloride into 29 to 33 mass percent hydrochloric acid aqueous solution which contains a dispersant, controlling the temperature to between 28 and 45 DEG C for reaction to generate silica sol and chlorine hydride gas, standing and ageing the silica sol to form colloidal white flocculent sediment, filtering, separating and washing the sediment, and pelletizing and drying the sediment to obtain the precipitated white carbon black. The process has short flow, relatively simple production equipment and process control, and available raw materials, effectively utilizes the silicon tetrachloride, totally reclaims the product chlorine hydride, reduces the processing expense, the amount of waste acid and the environmental pollution, and has low production cost, wide application and large market capacity.

The invention in particular relates to a method for improving tensile mechanical property of fibers and belongs to fiber modification technologies. The method comprises the following steps: taking papa-phenylene diisocyanate and ethidene diamine as precursors, and depositing a polyurethane film on the fiber surface by adopting an atomic layer deposition technique. Due to excellent shape preservation of the atomic layer deposition technique, the defects of the original fibers can be effectively reduced, and due to high elasticity of polyurethane, the original fibers can effectively buffer instantaneous mechanical changes in the tensile process, so that the tensile mechanical properties of fibers can be effectively reduced. The preparation method is simple, the deposition process is easy to control, the cost and energy consumption are low, and the method is pollution-free to the ecological environment and suitable for industrial production.

The invention belongs to the technical field of high polymer materials and relates to a preparation method of a pipe. The preparation method comprises the following steps of: (1) placing a compound prepreg tape in a winding device, and then enabling the compound prepreg tape to pass through each tension roller in the tension roller group sequentially; (2) pre-heating the compound prepreg tape which is treated in the step (1); (3) heating the compound prepreg tape preheated in the step (2) at a winding point; (4) winding the compound prepreg tape heated in the step (3); and (5) finally, solidifying and shaping in situ to obtain the pipe. Compared with the prior art, the preparation method of the continuous fiber-reinforced thermoplastic compound prepreg tape pipe, disclosed by the invention, has the advantages of low cost, simple equipment, short shaping period and the like; and the produced thermoplastic compound pipe has a light weight, is high-pressure resistant and anticorrosive, and can be applied to the high-end field such as petrochemical engineering.