510results about How to "Not easy to fall off" patented technology

A single-layer diamond grinding tool features that the abrasive particles are uniformly distributed on the surface of basic body in such manner that their exposed parts have a same height. Its preparing method features use of an air sucking mesh plate to uniformly arrange the abrasive particles on the surface of basic body.

The invention relates to a tubular nanofiltration membrane with a multi-layer structure and a preparation method thereof. The tubular nanofiltration membrane with the multi-layer structure is four-layered, and the four layers comprises a first layer, a second layer, a third layer and a fourth layer from inside to outside in sequence, wherein the first layer is a microfiltration supporting tube made from a carboxyl-contained fiber knitting tube which is filled with inorganic minerals; the second layer is a ultrafiltration layer formed by coating carboxyl-contained polymer on the outer surface of the first layer; the third layer is a nanofiltration layer made of polyamide formed by interfacial polymerization; and the fourth layer is a water loving layer forming covalent binding with the third layer. The tubular nanofiltration membrane with the multi-layer structure is obtained through the steps of forming functional layers from indie to outside in sequence, and stable chemical binding is formed among layers, so that the tubular nanofiltration membrane has excellent resistance to pressure and mechanical strength, and good water loving property, water permeability and antifouling ability; and moreover, the flux reaches more than 30 L/m<2>h, the removal rate of singlevalent salt is more than 30%, and the removal rate of bivalent salt is more than 95%.

An apparatus for preparing the stainless steel-diamond wire used to cut crystal steel by electric coat-spray method is composed of pulse power supply, coating pen, magnetic circulating pump, plating liquid concentration balancing pool, air compressor, and wire paying off and winding unit. Its method includes such steps as washing stainless steel wire, heat treating, washing, coating while spraying, testing, heat treating, washing and examining.

The invention discloses a solid-phase micro-extraction coating prepared on the basis of polydopamine modified stainless steel wires and a preparation method and application thereof, which belong to the field of analytical chemistry. The preparation method includes steps of utilizing stainless steel wires which are modified by polydopamine as a solid-phase micro-extraction fiber matrix and utilizing quartz capillary tubes as moulds, and finally forming the solid-phase micro-extraction coating after methacrylic acid and ethylene glycol dimethacrylate are subjected to in-situ polymerization in the capillary tubes and then react with polydopamine so as to be bonded on the surfaces of the stainless steel wires. The solid-phase micro-extraction coating prepared on the basis of polydopamine modified stainless steel wires is applied to pretreatment of analysis of chlorophenols and polychlorinated biphenyls. Mechanical strength is enhanced due to the fact that the stainless steel wires are used as the matrix. The coating is not easy to shed off the surfaces of the stainless steel and is long in service life. Due to the capillary tubes serving as the moulds, the coating is uniform in thickness, fine in reproducibility and low in cost. On the optimum extraction condition, the coating has low limit of detection to four types of chlorophenols and six types of polychlorinated biphenyls and meets requirements of trace analysis.

The invention discloses an antibacterial nano-fiber non-woven material and a preparation method. The antibacterial nano-fiber non-woven material comprises at least two antibacterial nano-fiber layers, a hydrophilic nano-fiber layer is arranged between every two adjacent antibacterial nano-fiber layers, nano-fibers of the antibacterial nano-fiber layers are crossed in the three-dimensional space to form holes with nanoparticles and nano-fiber clusters, and antibacterial nano-silver particles and antibacterial nano-zinc oxide particles are distributed in the holes; the nano-silver particles and antibacterial nano-zinc oxide particles are distributed in the holes with nanoparticles and nano-fiber clusters, and the antibacterial particles cannot fall off easily and act jointly, so that the antibacterial nano-fiber non-woven material has the lasting antibacterial property. Besides, the hydrophilic nano-fiber layer provides the antibacterial nano-fiber non-woven material with the good hydrophilic property. The antibacterial nano-fiber non-woven material prepared with the preparation method can be widely applied to the fields of articles for daily use, medical care, hygienic products for infants and adults and the like.

The invention discloses a MoS2/carbon fiber network flexible electrode and a preparation method and application thereof. The flexible electrode is formed by wrapping a surface of a three-dimensional carbon fiber network substrate framework with MoS2. The preparation method of the flexible electrode comprises the steps of placing cotton fiber paper in a mixed solution of a molybdenum source and a sulfur source for immersion, and sequentially performing vacuum freezing, drying, calcination and cooling to obtain the flexible electrode. According to the method, the cotton fiber paper is used as a carrier of the sulfur source and the molybdenum source, a three-dimensional porous conductive carbon fiber network structure with flexibility is generated by high-temperature carbonization, meanwhile, in-site growth and loading of the MoS2 are achieved, a current collector, and an adhesive and a conductive agent are prevented from being used during the traditional electrode preparation process; and moreover, the method has the advantages of simplicity, high efficiency and the like, and the obtained MoS2/carbon fiber network electrode has favorable cycle property, rate performance and flexibility and can be used as a flexible lithium ion battery negative electrode so as to be widely applied in the field of a wearable electrochemical energy-storage or flexible electronic product.

The invention discloses a safe guarding device for a power relaying protection field work and a use method thereof. The safe guarding device comprises a guarding device and an isolating device, wherein the guarding device is used for maintaining the work, and the isolating device is used for operating the work. The guarding device for maintaining the work comprises a secondary cable core guardingcap, a guarding cap, a terminal block guarding fence and a protection work voice prompter, which are used for protecting a cable core, a pressing plate and a terminal block. The isolating device for operating the work comprises a protecting screen safety isolating guardrail, a protecting device isolating cover, a protecting pressing plate isolating cover, a terminal block isolating cover, a secondary security isolating cover, a CT externally attached terminal isolating cover, a security temporary storage box, a working signboard and an operation handle isolating cover, which are used for isolating and protecting equipment. Each guarding device is adhered with a marking note corresponding to the work state. The safe guarding device has the advantages of fixation, reliability, obvious mark,simple operation, norm and cleanness, and no influence to operation of the equipment by a magnetic field of a magnet, and is suitable for isolating and protecting various kinds of relay protection equipment and devices.

The invention relates to an electrochemical biosensor and application thereof, in particular to an electrochemical biosensor based on chitosan-immobilized acetylcholinesterase and application thereof. The acetylcholinesterase is immobilized with chitosan by way of layer-by-layer self-assembly, but not immobilized by simple cross-linking. The biosensor detects organic phosphorus and carbamate pesticides at a higher sensitivity, and a prepared enzyme electrode is not easy to fall off has better repeatability, better stability and longer service life.

The invention discloses a method for spraying the inner aperture wall with a novel plasma cored wire. The method comprises the following steps: 1, preprocessing the surface of a workpiece; 2, selecting an iron-based cored wire containing an antifriction wear-resistant powder core added with molybdenum (Mo), chromium (Cr), nickel (Ni), boron (B), silicon (Si), and iron (Fe) components and a stainless steel shell, and spraying the iron-based cored wire on the small inner aperture surface of the workpiece through a plasma transferred wire arc (PTWA) spraying technology to obtain a wear resistantcoating; and 3, carrying out honing processing on the prepared wear resistant coating. The wear resistant coating prepared through the method of the invention has the advantages of high strength of the combination with a matrix, difficult shedding, hardness higher than the hardness of traditional cast iron liners, substantially improved wear resistance, realization of the oil storage function of 1-5% of apertures formed through the coating technology, lubrication promotion to reduce antifriction, and the like, so problems of weight and dimension increase of the cast iron liner of an aluminum alloy engine cylinder and problems of oil consumption and discharge increase caused by the thermal expansion of the inner wall of the cylinder are solved.

The invention discloses an atrial septal pore-forming scaffold and a conveyor thereof. The scaffold is in continuous netted structure; the width of a section rod of a main unit section which is positioned in the middle is larger than that of section rods of secondary unit sections which are positioned on both sides of the scaffold so that deformation resistance of the secondary unit sections on both sides of the scaffold is less; after the scaffold is implanted, both sides of the scaffold are first expanded to form a trumpet shape, and the main unit section in the middle is then expanded to form a column shape, thus the scaffold forms the structure with the column shape in middle and the trumpet shape on both sides. Because a certain effect of 'dog bone' is generated in the process of scaffold expansion, i.e. a process of axial retraction is generated after scaffold expansion, the trumpet shape formed on both sides is just fastened outside a formed pore after retracting slightly when the atrial septal pore-forming scaffold is expanded, and thus the scaffold is accurately positioned, can be firmly fixed in the formed hole and are not easy to fall off to both sides.

The invention discloses a preparation method for an antibacterial composite material. The preparation process of the preparation method comprises the following steps: (1) dissolving or dispersing nano silk fibroin powder, polyurethane and silver salt in the same organic solvent to obtain a silk fibroin solution, a polyurethane solution and a silver salt solution; (2) by stirring at 55-60 DEG C in a water bath, adding the silk fibroin solution to the polyurethane solution for mixing and sufficient reacting, and then adding the silver salt solution to a mixed system of the silk fibroin solution and the polyurethane solution; after the obtained reaction solution becomes brown yellow, separating out a reaction product by using mass water; stirring and washing the reaction product by using a large quantity of water to remove residual organic solvents until the water is clear without oily matters; and drying to obtain the antibacterial composite material. The composite antibacterial material prepared by the method has the advantages of controllable parameter, simple process, benefit to large-scale production, low cost, remarkable antibacterial effect and good biocompatibility and formability.

The invention discloses a solid phase microextraction fiber for polycyclic aromatic hydrocarbon enriching detection and a manufacturing method thereof, and belongs to the technical field of contaminant detection. The invention provides a method capable of being used for manufacturing a solid phase microextraction coating on different fiber substrates and realizing combined use with gas chromatography or gas chromatography-mass spectrum, and the method is used for polycyclic aromatic hydrocarbon contaminant detection. Metal fiber is used as a substrate; dopamine is polymerized on the surface ofthe substrate so as to provide functional groups for polydopamine; the polydopamine is firstly combined with COF material single ligands so as to provide an anchor point; a PDA-COP composite layer isfinally synthesized and is used for solid phase microextraction. The solid phase microextraction fiber has the advantages that through the great pi bond effects between the solid phase microextraction fiber and the polycyclic aromatic hydrocarbon, the adsorption effect on the polycyclic aromatic hydrocarbon can be enhanced; during the enrichment, a certain separation effect is achieved; the substrate pretreatment step of samples can be effectively simplified; meanwhile, the enriching capability of the polycyclic aromatic hydrocarbon contaminants can be greatly improved; the detection limit ofthe polycyclic aromatic hydrocarbon contaminants can be reduced.

A catalyst for catalytic combustion features that a coated composite oxide layer based on CeO2 is carried by cellular ceramic carrier. It contains the cellular cordierite ceramic matrix, coated composite oxide layer based on CeO2, and Pd. Its preparing process is also disclosed.

The invention discloses super-white environmental-friendly toughened glass ink and a preparation method thereof. The ink contains the following components by weight percent: 18% to 30% of colorant, 50% to 60% of glass substrate glaze, 18% to 30% of varnish and 0.1% to 1% of additive. The super-white environmental-friendly toughened glass ink has no pollution to an environment and a human body, is good in weatherability, has small possibility of shedding and color changing, and ensures that the aesthetic sense of the ink can be maintained for a long time.

The invention provides a molecular sieve coating load manganese based composite oxide integrated catalyst with easy material acquisition, low preparation cost and firm combination of active constituents and carrier of catalyst, and a preparation method thereof for the defects that the noble metal catalyst has few noble metal resources, high price and high preparation cost. The catalyst provided by the invention is a cellular catalytic combustion catalyst, which comprises a molecular sieve coating, a manganese based composite oxide and a cellular carrier. The catalyst provided by the invention is prepared by the following steps of: uniformly mixing a precursor with the manganese based composite oxide, the molecular sieve and the water to obtain a grout with manganese based composite oxide precursor; soaking the cellular carrier into the grout with manganese based composite oxide precursor; and drying and baking to obtain the molecular sieve coating load manganese based composite oxide integrated catalyst.

The invention discloses a lithium ion battery separator, a preparation method thereof and a lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium ion battery separator comprises a PP/PE/PP porous film substrate and a cyclodextrin polymer layer. The preparation method of the lithium ion battery separator comprises the following steps of uniformly coating cyclodextrin polymer paste on the PP/PE/PP porous film substrate to form a cyclodextrin polymer layer, and obtaining the lithium ion battery separator after drying, wherein the cyclodextrin polymer pastecomprises a cyclodextrin polymer and water. By the lithium ion battery separator and the preparation method thereof, the defects that a traditional separator matrix material is not resistant to high temperature and is poor in safety and a ceramic coating separator is easy to damage are overcome, the cyclodextrin polymer layer of the lithium ion battery is difficult to fall off, and the coated separator has relatively good electrochemical performance and mechanical property, is low in thermal shrinkage rate and good in safety and is suitable for high-rate charging and discharging.

The invention discloses a process for hatching glutinous gamogenetic egg fish fry comprising the steps of parent fish culturing, birth facilitating, semination and incubation, which is characterized in that the fertilized ovum is spread onto the net sheets on the ovum spreading pond, after the fertilized ovum is fixed on the net sheets, it is charged into incubation pool for hatching. The invention can result in higher adhesive strength for the fertilized ovum.

The invention discloses a nano-apatite/collagen compound stent and a preparation method and an application thereof. The method comprises the steps of firmly distributing nano-apatite in a collage sponge with high porosity, then shaping, freeze-drying and cross-linking for preparation. The nano-apatite/collagen compound stent prepared by the method can be applied as a repair material in orthopaedics and dentistry. The porosity of the nano-apatite/collagen compound stent prepared by the method can be above 98%, the size is distributed in the range of 5-200 mu m, and micropores are mutually communicated; nano-apatite in the nano-apatite/collagen compound stent is distributed in collagen fiber and less prone to shedding; and the original shape can be kept after being immersed in water, and the nano-apatite/collagen compound stent can be restored to the original shape after being extruded.

The invention discloses a preparation method of deodorizing type flexible polyurethane foam containing long-acting and slow-release plant essential oil. According to the method, firstly, a halloysite nanotube is activated, then a reticular structure is formed on the surface of the activated halloysite nanotube through a polymerization reaction of cyclodextrin and isocyanate, and the nanotube is loaded with the essential oil through impregnation; then solid plant essential oil is added to a polymerization reaction process of polyurethane foam, and an active group of a cyclodextrin molecule on the surface of the solid plant essential oil can participate in the polymerization reaction of the polyurethane foam, so that the solid plant essential oil is closely connected with the flexible polyurethane foam and cannot fall off easily.

The invention discloses a technique to preparing metallic oxide electrode with poly forerunner body thermal decomposition method, which comprise the following steps: preparing poly forerunner body solution with metallic element; multiple-coating poly forerunner body solution on ground-mass; thermal-decompositing; firing; getting the product; belonging to preparing technical domain of electric pole material; reacting polybasic carboxylic acid , polyatomic alcohol and metallic compound; getting the poly forerunner body solution; making the ground-mass as one of titanium, tantalum, niobium, zirconium and non-corrodible steel; This product possesses high electrocatalysis activity, good conductive property, long age and low cost, which can be used to electrochemical synthesis and negative pole protecting domains.

The invention relates to the field of environmental governance, in particular to a heavy metal absorbent and a preparation method thereof. The preparation method comprises the following steps: modifying attapulgite clay powder by using an aminosilane coupling agent to obtain attapulgite clay modified by a silane coupling agent; then dispersing the attapulgite clay in a glutaraldehyde solution, and fully stirring to obtain attapulgite clay modified by glutaraldehyde; and dropwise adding an acid solution of sodium alginate in suspension liquid of the attapulgite clay modified by the glutaraldehyde, heating and fully reacting to obtain a sodium alginate grafted and crosslinked attapulgite clay heavy metal absorbing material. By a mode of covalent bonds, the sodium alginate is grafted and crosslinked to the surface of the attapulgite clay, and in a using process, the sodium alginate cannot drop easily.

The invention relates to the field of building materials, in particular to a light environment-friendly foaming cement thermal insulation material. The thermal insulation material is characterized by being made from the following raw materials in parts by weight: 70-90 parts of cement, 30-50 parts of coal ash, 10-20 parts of hollow glass beads, 3-8 parts of foaming agent, 0.4-2 parts of stabilizer, 1-1.5 parts of water reducer, 5-10 parts of aluminum sulfate and 0.1-0.3 part of polystyrene granules. The light environment-friendly foaming cement thermal insulation material has high fire resistance and a good thermal insulation effect, is prevented from falling off and aging easily, and is environment-friendly.

The invention provides a water transfer printing process. The water transfer printing process comprises the following steps that S1, image-text layer printing is conducted, specifically, UV printing ink which does not contain a light curing agent is printed on a water transfer printing thin film, so that an image-text layer is formed; S2, image-text layer activating is conducted, specifically, the water surface of a transfer printing water tank is horizontally paved with the water transfer printing thin film, and an activating agent and a light curing agent are uniformly sprayed on the surface of the image-text layer; S3, water transfer printing is conducted, specifically, a product needing to be subjected to water transfer printing is gradually attached to the water transfer printing thin film, and the image-text layer is slowly transferred to the surface of the product; S4, washing is conducted, specifically, residual thin film bodies on the product are removed, and floating layers on the surface of the product are washed with clear water; S5, drying is conducted, specifically, ultraviolet rays are shone onto the product, and curing and drying are conducted; S6, paint spraying is conducted; and S7, drying is conducted. According to the water transfer printing process provided by the invention, the UV printing ink can be transferred to the product, and a variety of images and texts can be printed on the product and are environmentally friendly and not prone to disengaging.

The invention discloses manufacturing equipment and a manufacturing method for an electrode of a power type lithium ion battery. The manufacturing equipment comprises a vibration disk, a foam metal die, an electrode solid-state filler powder box and foam metal, wherein the foam metal die is arranged on the vibrating disk; the electrode solid-state filler powder box is arranged above the foam metal die; and the foam metal is arranged in the foam metal die. The foam metal with the characteristics of high electric conductivity, high thermal conductivity, large specific surface area, uniform and small through holes and the like is adopted as a current collector, and a skeleton structure of the foam metal is inserted into powdery active substances for pressurization to obtain an electrode plate with strong binding force, so that the active substances difficultly fall, the electric conductivity of the active substances of the electrode is effectively improved, internal resistance is lowered, heat produced by the battery is reduced, radiation is facilitated, and the service life of the battery is prolonged; and in addition, a solid-state active substance is used for directly filling the foam metal without an aqueous solution or a non-aqueous solvent, so that the obtained electrode plate is not required to be baked to remove the solvent, the manufacture period of the battery is shortened, energy consumption is reduced, and production cost is saved.

The invention relates to a sampling apparatus, in particular to a high-efficiency soil sampling apparatus for environmental detection. The invention aims at providing a high-efficiency soil sampling apparatus for environmental detection which is simple in sampling operation, time-saving, labor-saving, high in sampling efficiency and capable of obtaining deep soil. In order to solve the technical problem, the invention provides the high-efficiency soil sampling apparatus for the environmental detection. The high-efficiency soil sampling apparatus comprises a transverse plate, supporting rods, a nut, a screw rod, a drill bit, a guide sleeve, a pressure plate, a first spring, a fixed plate, a handle, a guide rod, a connecting rod and a shovel; the left side and the right side of the bottom of the transverse plate are respectively provided with the supporting rod, the nut is arranged in the middle of the bottom of the transverse plate, the nut is internally provided with the screw rod, the screw rod is matched with the nut, the top of the screw rod is provided with a fixed plate, the right side of the top of the fixed plate is provided with the handle, and a guide hole is formed in the middle of the fixed plate. The high-efficiency soil sampling apparatus samples the soil in a manner of manually rotating the screw rod, and can also acquire the soil at different depths according to the requirements.

The invention discloses suspended microbial packing for wastewater treatment and a preparation method thereof. The suspended microbial packing is prepared from, by weight, 65-75 parts of high density polyethylene, 5-15 parts of slaked lime, 5-20 parts of Dow powdered activated carbon, 6-10 parts of light calcium carbonate, 3-5 parts of maleic anhydride, 1.5-3 parts of gelatin, 1-2 parts of chitin, 0.8-2 parts of ferromagnetic oxide powder and 0.1-0.3 part of manganese zinc ferrite. The suspended microbial packing is high in film formation speed, not prone to fall off, high in treatment efficiency and suitable for treatment of low-concentration organic matter and ammonia nitrogen in sewage and low-concentration organic wastewater. The biological packing has the extremely high hydrophilicity and biocompatibility, has the very high adsorption strength to a biological film and is beneficial for interception and accumulation of biomass on a packing carrier, and therefore the packing can better adapt to wastewater treatment under the low concentration condition.

The invention discloses a table top injection molding edge covering technology. The table top injection molding edge covering technology comprises the following steps that table top plate cutting, table top plate edge processing, table top plate edge polishing and table top plate surface and edge processing are performed, and finally covered edges are formed at the edges of a table top plate through one-time injection. Accordingly, plastic and the plate are closely combined, disengagement is not prone to occur, the edges are good in waterproofness and can be cleaned through washing, the defect that the edges are traditionally sealed with PVC lines or paint is effectively overcome, and the service life of a table is greatly prolonged.

The invention discloses a watchband made of silica gel and a producing method of the watchband. A character pattern ink layer printed on at least one surface of the watchband is durable, abrasion resistant and not apt to release. The watchband comprises a base band and a composite layer composed of at least one unit composite layer, wherein each unit composite layer is formed by a thin film and the character pattern ink layer printed on the inner surface of the thin film, the composite layer is bonded or permeated on the surface of the base band in a liquid state vulcanizing or solid state vulcanizing forming method in the mode that the character pattern ink layers are overlapped between the surface of the base band and the inner surface of the thin film. The watchband is soft and good in toughness. The character pattern ink layers are overlapped between the thin film and the silica gel base band, and the character pattern ink layers, the thin film and the base band are tightly combined under effect of high temperature. Character patterns are printed on the thin film in large-scale printing mode so that cost is reduced and time is saved.

The invention makes public a kind of method to produce hollow brick that has core in itself and the correspondent device. Put heat preservation and insulation material in the below module. Then put row material of the hollow brick in the below module also. The up extruding module drives the pressing head to press the under module. So the heat preservation and insulation material is set in the hollow brick. The heat preservation and insulation material connect to each other firmly so it won't brush easily. The module and technical tool that adopts this invention is high effective and easy to be use for industrialization production.

The invention discloses a method for grafting collagenous fiber with tannin, which includes the following steps: the collagenous fiber is added into water by dry weight for dissolving, the vegetable tannin is added for reacting under room temperature for 2 to 6 hours, then crosslinking agent is added and the pH valve of the system is controlled to be 5.0 to 7.5, then the temperature is raised to 30 to 45 DEG C after the stirring reaction is carried out for 2 to 4 hours, and then the stirring reaction is carried out again for 2 to 6 hours, thus, the grafting is finally finished after filtering and washing. The invention also discloses a method for loading palladium catalyst in the process of grafting the collagenous fiber with the tannin, and the method includes the following steps: deionized water is added in the process of grafting the collagenous fiber with the tannin to be stirred for 2 to 4 hours, then palladium is added and the pH value of the system is controlled to be 3.5 to 5.5, then the stirring reaction is carried out under the temperature of 25 to 35 DEG C for 2 to 8 hours, and then the reaction is carried out again for 2 to 6 hours after the temperature is raised to 40 to 50 DEG C, and finally the un-reacted palladium is removed by filtering and washing or the reaction is continued to reduce the palladium to obtain the palladium nanometer catalyst loaded in the process of grafting the collagenous fiber with the tannin. The catalyst obtained by the method of the invention has the advantages of little possibility of falling off, high thermal stability, good accessibility of mass transfer, high catalytic reaction activity and good reusability.