32results about How to "Isolation erosion" patented technology

The invention belongs to the technical field of ultrafiltration materials and sanitary protection, and particularly relates to a novel dustproof, antibacterial and antiviral nano-fiber mask. The maskcomprises a mask main body, and is characterized in that the mask main body sequentially comprises a non-woven fabric layer, a multi-layer drug-carrying composite fiber membrane layer and a non-wovenfabric layer from inside to outside, wherein the multi-layer drug-carrying composite fiber membrane layer comprises at least three layers, the inner layer and the outer layer are melt blown layers orelectrostatic spun fiber membrane layers, and the middle layer is a loaded drug-carrying nano microsphere fiber membrane layer. The multi-layer drug-carrying composite fiber membrane layer used in themask can enhance the slow-release performance and the anti-virus and antibacterial properties of a drug through multiple mesoporous structures formed by drug-carrying nano microspheres and differentmaterials, the function of filtering particles and smell in air is enhanced, and the mask has relatively strong killing and inhibiting effects on public health safety, respiratory systems and infectious viruses.

The invention relates to an alkali resistant ceramic coating material and a preparation method thereof which are mainly applied in lithium battery production. The alkali resistant ceramic coating material is characterized by being formed by mixing the raw materials including composite powder, a binding agent and an additive, and the raw materials comprise, by mass, 50 parts of the composite powder, 10-40 parts of the binding agent and 15-40 parts of the additive. The alkali resistant ceramic coating material has the advantages that the coating is good in alkali resistance, capable of being fired in a wide temperature range and low in preparation cost.

The invention discloses a PVC sheet shield tunnel segment inner corrosion prevention system with linings. The system comprises a plurality of lining segments and the corrosion prevention linings embedded in the inner walls of the lining segments. The lining segments and the corrosion prevention linings are spliced together and constructed into the tubular shape in a lining mode. Joints are formed between the lining segments. The corrosion prevention linings are connected into a whole in a lap joint mode through hot melting and embedded in the inner walls of the lining segments. The corrosion resistance of the segment structure is greatly enhanced. After the lining segments are spliced, hot melting and lap joint processing is conducted on local parts without corrosion prevention linings such as the seams between the corrosion prevention linings and holes in the corrosion prevention linings, and it is ensured that the shield tunnel has the reliable overall leakproofness. Materials of the segment structure are convenient to take, the construction process is mature, and the construction cost is not high; for a water drainage pipeline formed by the lining segments under the sewage environment, corrosion of corrosive substances to the segment structure is isolated, the defect that the shield tunnel is prone to leakage at the seams of the segments is eliminated, and good application prospects are achieved.

The invention provides a preparation method of a cover plate for a polycrystalline ingot furnace thermal field. The method includes the following steps of firstly, selecting carbon fiber, and weaving the carbon fiber to form a carbon fiber prefabricated body; secondly, putting the carbon fiber prefabricated body into a resin impregnation solution to be impregnated; thirdly, conducting thermal compression and carbonization treatment on the product; fourthly, conducting compaction treatment and high-temperature purification treatment on the product; fifthly, preparing a silicon carbide coating on the surface of the product; sixthly, conducting machining to obtain the final product. The method is easy and convenient to operate, high in integrity, free of layering and cracking in the use process and long in service life.

The present invention provides an industrial automation control cabinet dustproof and anti-corrosion ventilation system and method. The system comprises: air inlet units (an air inlet module, a dust filtering module, an internal and external circulation module, an electrostatic dust collection module, an activated carbon adsorption module, a fan module, a temperature collection module and a singlechip microcomputer control module), and an air inlet unit (an air outlet module). The temperature in a control cabinet is determined through temperature sensing, internal and external circulation ventilation modes are selected, more than 99.9% tiny dust or harmful particles are removed by the electrostatic dust collection module through the dust filtering module in the air required being ventilated or in a purification cabinet, and enter the activated carbon adsorption module to absorb chemical gases, and the fan is employed to drive the air with high cleanness to enter the control cabinet tocomplete ventilation and circulation. The ventilation problem of the automation control cabinet installed indoors and outdoors in a work environment with poor conditions, a large dust concentration or having few of chemical corrosive gases in the industries such as metallurgy, buildings, petro-chemical and cement is solved.

The invention belongs to the technical field of lithium ion batteries, and in particular relates to a porous silicon negative electrode material for lithium ion batteries and a preparation method thereof. The porous silicon negative electrode material includes nanoporous silicon, conductive carbon and amorphous carbon, and the nanoporous silicon contains Contains oxygen, the oxygen content is 10-40wt.%, the proportion of nanoporous silicon in the negative electrode material is 30%-80wt.%; the proportion of conductive carbon is 5%-30wt.%; the proportion of amorphous carbon %, the median particle size D50 of the nanoporous silicon is below 110nm, and the maximum particle size D100 is below 260nm. The nanoporous silicon is prepared by a wet grinding process, and the raw material is porous silicon powder. The porous silicon powder disclosed by the present invention Silicon anode materials have excellent electrochemical properties, high specific capacity, excellent cycle performance, and high initial efficiency.

The invention provides an intelligent mineral insulated cable, which comprises a cable inner core structure and a cable sheath structure, wherein the cable inner core structure comprises a distributed optical fiber temperature sensing system, an optical fiber, a PBT sheath, a copper conductor and a mineral insulating layer, the cable sheath structure sequentially comprises a halogen-free low-smoke flame-retardant polyolefin inner sheath, a quartz net layer, a mica tape layer, a ceramic polyolefin sheath, a nylon sheath layer and a halogen-free low-smoke flame-retardant polyolefin sheath layer from inside to outside, and filling is arranged between the cable inner core structure and the cable sheath structure. The intelligent mineral insulated cable has the beneficial effects that the intelligent mineral insulated cable can transmit optical signals while transmitting power, can intelligently detect physical quantities such as stress, temperature, liquid flow rate, sound pressure, hydraulic pressure and magnetic field around the mineral insulated cable along with the change of working conditions, enables the mineral insulated cable to be in an optimal working state, and adopts the ceramic polyolefin sheath and the nylon sheath, so that the cable has the performance of being resistant to bite of rats and ants, fireproof, flame-retardant, green, environment-friendly and the like.

The invention belongs to the field of ultrafiltration materials and the field of health protection technology, and specifically relates to a novel dustproof, antibacterial and antiviral nanofiber mask, which includes a mask main body, and is characterized in that: the mask main body sequentially includes non-woven fabrics from inside to outside Layer, multi-layer drug-loaded composite fiber film layer and non-woven fabric layer, the multi-layer drug-loaded composite fiber film layer includes at least three layers, the inner and outer layers are meltblown layers or electrospun fiber film layers, and the middle layer It is a fiber membrane layer loaded with drug-loaded nano microspheres. The multi-layer drug-loaded composite fiber membrane layer used in the present invention can enhance the slow-release performance, anti-virus and anti-bacterial properties of drugs through drug-loaded nano-microspheres and various mesoporous structures formed by different materials, and enhance the filtration of particulate matter and odor in the air It has a strong killing and inhibiting effect on public health safety, respiratory system, and infectious viruses.

The invention relates to a boric oxide fiber damp-proof coating material and the production method thereof, and belongs to the technical field of special ceramic. The invention comprises the steps as follows: liquid paraffin and paradichlorobenzene are mixed in the ratio of 100ml: (5 to 30) g. The liquid paraffin is mixed with the paradichlorobenzene to be heated and mixed by a magnetism mixing device with the heating temperature of 40 to 80 DEG C till the paradichlorobenzene unfreezes completely and the solution is cooled to the room temperature, then the damp-proof coating material for the boric oxide fiber is obtained. The coating material of the invention has the functions of drawing lubrication, and preventing the boric oxide fiber from pulverization. The material is coated at the surface of the front boric oxide fiber and can form a layer of thick protective films at the boric oxide fiber surface, and separates the corrosion of water to the boric oxide fiber, improves the intensity of the boric oxide fiber obviously, thereby improving the integrative performance of the boric oxide fiber and having good basis for research of the fiber reinforcing ceramics composite material. The invention which has simple and reasonable production method is convenient and practical.

In order to fill in the gaps in the prior art, the present invention discloses a method for in-situ construction of a superhydrophobic coating on the surface of a copper alloy for the first time: introduce divalent and trivalent elements (such as Zn, Al) into the copper alloy, and the copper alloy Immersed in sodium chloride solution, the layered double metal hydroxide / oxide multi-level structure film can be obtained in situ; determine the microscopic morphology and phase type of the synthesized multi-level structure, and adjust the temperature for preparing the coating. A multi-level structure with different densities was built; the static contact angle of the surface modified by perfluorooctyl triethoxysilane was determined; and the corrosion resistance of copper alloys with superhydrophobic coatings was characterized by electrochemical tests, thereby Demonstration of corrosion resistance of superhydrophobic coatings. The present invention is the first proposed method for constructing a superhydrophobic coating on the surface of copper alloy in situ, which is simple, convenient, energy-saving, environmentally friendly, low in cost, strong in controllability, strong in binding force with copper alloy substrate, stable in structure and relatively practical. Strong, can be widely used in industrial production.

The invention relates to an alkali resistant ceramic coating material and a preparation method thereof which are mainly applied in lithium battery production. The alkali resistant ceramic coating material is characterized by being formed by mixing the raw materials including composite powder, a binding agent and an additive, and the raw materials comprise, by mass, 50 parts of the composite powder, 10-40 parts of the binding agent and 15-40 parts of the additive. The alkali resistant ceramic coating material has the advantages that the coating is good in alkali resistance, capable of being fired in a wide temperature range and low in preparation cost.

The invention discloses a PVC sheet shield tunnel segment inner corrosion prevention system with linings. The system comprises a plurality of lining segments and the corrosion prevention linings embedded in the inner walls of the lining segments. The lining segments and the corrosion prevention linings are spliced together and constructed into the tubular shape in a lining mode. Joints are formed between the lining segments. The corrosion prevention linings are connected into a whole in a lap joint mode through hot melting and embedded in the inner walls of the lining segments. The corrosion resistance of the segment structure is greatly enhanced. After the lining segments are spliced, hot melting and lap joint processing is conducted on local parts without corrosion prevention linings such as the seams between the corrosion prevention linings and holes in the corrosion prevention linings, and it is ensured that the shield tunnel has the reliable overall leakproofness. Materials of the segment structure are convenient to take, the construction process is mature, and the construction cost is not high; for a water drainage pipeline formed by the lining segments under the sewage environment, corrosion of corrosive substances to the segment structure is isolated, the defect that the shield tunnel is prone to leakage at the seams of the segments is eliminated, and good application prospects are achieved.

The invention relates to a method for processing a porous material by hydrogenated silicon oil, which comprises the following steps: taking 0.1-0.8% of hydrogen amount-containing hydrogenated silicon oil and cooperating with a silane coupling agent and an aqueous solvent to prepare a water-dilutable hydrogenated silicon oil processing agent, performing heat treatment, performing pumping filtration and drying on the surface of the porous material, and on internal porosity. The hole of the processed porous material is not sealed, the processed porous material has super-hydrophobicity, can effectively isolate the erosion of corrosion mediums such as aqueous vapor and pollutants on the material, can be used for surface treatment on the porous materials such as metals, inorganic silicate and an organic polymer, and can ensure the stabilization of the performances of porosity and machinery intensity in various environment. The processing method can be used for protecting porous materials such as heat insulation materials, sound-insulation sound-absorption materials and low-density structure materials.

The invention belongs to the technical field of lithium ion batteries, and in particular relates to a core-shell structure porous silicon negative electrode material for lithium ion batteries and a preparation method thereof; the porous silicon negative electrode material has a core-shell structure, and the core contains nanoporous silicon, graphite and amorphous carbon, the shell is amorphous carbon; the proportion of nanoporous silicon in the negative electrode material is 30% to 70wt.%, the proportion of graphite is 20% to 45wt.%, and the proportion of amorphous carbon is 10% to 40wt. .%; the microporous silicon raw material contains 1 to 10wt.% of oxygen, and the oxygen content in the nanoporous silicon obtained by wet grinding is 12 to 35wt.%; the negative electrode material of the present invention is used as lithium ion When the negative active material of the battery is used, it can significantly increase the battery capacity, and has excellent cycle performance, and the raw material is cheap, and the preparation process and equipment are mature, which is suitable for large-scale production.

The invention provides a gas turbine without a main shaft. The gas turbine is characterized by comprising a housing, a rotor assembly, a stator assembly and a bearing assembly, wherein the rotor assembly and the bearing assembly are mounted in the housing, the bearing assembly supports the rotor assembly, and the stator assembly is connected with the housing; the rotor assembly comprises a rotor ring and a plurality of rotor blades, the rotor blades are arranged on the rotor ring, and the rotor ring is arranged on the housing; and the stator assembly comprises a rim and a plurality of guide blades, the guide blades are arranged on the rim, and the rim is arranged on the housing. The gas turbine has the advantages of being small in occupied space, high in energy conversion efficiency, largein output mechanical power, small in vibration and the like, and is particularly suitable for being applied to the engine technology of a new generation of advanced aerospace vehicles and modern civil airliners.

A downhole quartz resonant pressure sensor, which includes a cylindrical housing, a quartz crystal resonator and a bracket arranged in the housing, the quartz crystal resonator is embedded in the bracket, and the bracket is fixedly installed in the housing; the housing There is a screw hole in the center of one end of the housing, and a fine-tuning screw is inserted into the screw hole. The other end of the housing is provided with a pressure detection window. The pressure detection window is sealed with an elastic metal diaphragm. Corresponding to the center of one side of the shell, there is a convex column; the quartz crystal resonator is an open ring sheet-shaped 4.992MHz quartz crystal resonator with a fifth-order overtone thickness shear vibration mode, and a quartz crystal resonator is welded on it. For the sealed lead-out ends of the electrodes passing through the shell; the corresponding ends of the fine-tuning screw and the protruding post are respectively inserted into the bracket, and the force-sensitive points of the quartz crystal resonator are in contact with the corresponding end faces of the fine-tuning screw and the protruding post respectively.

The invention discloses a rigid polyvinyl chloride product, which contains the following components in parts by mass: 100 parts of polyvinyl chloride, 1.6-2.2 parts of organic tin mercaptan, 0.6-1.0 parts of internal lubricant, and 0.2-2.2 parts of external lubricant. 0.5 parts, 6-14 parts of impact modifier, 0.2-0.5 parts of waterproof modifier, and add appropriate amount of pigment. The invention also discloses a preparation method of the rigid polyvinyl chloride product. In the hard polyvinyl chloride product formula of the present invention, do not add any plasticizer, have avoided the phenomenon that the surface of the polyvinyl chloride product is sensitive to water and become white due to the influence of the ester group of plasticizer; In addition, in the hard polyvinyl chloride product of the present invention The formula of high-quality polyvinyl chloride products contains a hydrophobic base waterproof modifier, which significantly improves the solvent resistance and permeability resistance of polyvinyl chloride products, effectively isolates the erosion of external water or water vapor, and protects the polyvinyl chloride products. The surface of vinyl products makes it have good appearance performance.

The invention discloses a preparation method of a super-high temperature antioxidation graphite die. The method comprises the following steps: 1) cleaning a processed graphite die blank sample, dryingthe processed graphite die blank sample, and performing calcinations; 2) employing a graphite die antioxidation pretreatment agent for dipping the graphite die blank sample; 3) performing high-temperature solidification on the graphite die blank sample, 4) coating the surface of the graphite die blank sample with a silicon carbide slurry, after air drying, performing heat treatment on the graphite die blank sample, and cooling the graphite die blank sample to room temperature to prepare the graphite die blank sample having a silicon carbide transition layer; and 5) coating the surface of thegraphite die blank sample having the silicon carbide transition layer with a high-temperature ceramic paint, after air drying, performing heat treatment on the graphite die blank sample, and cooling the graphite die blank sample to room temperature to obtain the super-high temperature antioxidation graphite die. The super-high temperature antioxidation graphite die has the advantages of good thermal shock stability, high temperature resistance and antioxidation performance, and after usage for 200 h at the temperature of 2000 DEG C, the graphite die sample is intact.

The invention discloses vehicle cleaning wax, which comprises the following components in percentage by weight: 6 to 10 percent of anionic surfactant, 8 to 12 percent of nonionic surfactant, 15 to 25 percent of carnauba wax, 12 to 20 percent of microcrystalline wax, 12 to 18 percent of wetting thickening agent, and the balance of water. The surface of a vehicle can be cleaned and waxed by the vehicle cleaning wax without using the water and mechanical equipment, so that not only the water resource is saved effectively, but also the surface of the vehicle has the shiny and clean effect anytimeanywhere, conveniently and quickly; the vehicle cleaning wax is a nontoxic and innocuous aqueous product, the used additive is a biodegradable environmental-friendly material, is not added with an organic solvent and does not have pungent smell of the organic solvent, so that the vehicle cleaning wax does not pollute air without volatilizing the organic solvent, does not damage vehicle paint, does not irritate human skin, and does not pollute the environment; meanwhile, compound plant protection wax can be covered on the surface of the vehicle so as to isolate the erosion of sand wind and acid rain, resist ultraviolet rays and delay the aging of the vehicle paint.