57results about How to "Improve composite effect" patented technology

The invention belongs to the technical field of composite plate manufacturing, and particularly relates to a ferritic stainless steel and carbon steel asymmetric composite blank and a manufacturing method thereof. The manufacturing method of the ferritic stainless steel and carbon steel asymmetric composite blank comprises the following working procedures of blank assembly raw material preparation, stainless steel middle plate pretreatment, blank assembly raw material surface treatment, cleaning, blank assembly and vacuum chamber electron beam seal welding. The process is simple, the cost is low, the blank manufacturing efficiency is improved, the method is suitable for mass production of products, and the ferrite stainless steel and carbon steel asymmetric composite blank with excellent quality can be obtained.

The invention provides a BN fiber-coated PANI nano composite wave-absorbing material and a preparation method thereof, and relates to the field of wave-absorbing materials. The preparation method of the BN fiber-coated PANI nano composite wave-absorbing material comprises the following steps: pre-contact, reaction coating and post-treatment. According to the BN fiber-coated PANI nano composite wave-absorbing material and the preparation method thereof, the defects that an existing microwave absorbing material formed by combining fibers and polyaniline is poor in thermal stability, the composite effect of the fibers and polyaniline is affected, and the microwave absorbing performance and the mechanical performance of the microwave absorbing material are affected can be overcome, meanwhile, uniform distribution of polyaniline on the outer surfaces of the boron nitride fibers is achieved, and the wave-absorbing performance of the BN fiber-coated PANI nano composite wave-absorbing material is improved. Polyaniline and boron nitride fibers are effectively and firmly combined; the flame retardant property, the corrosion resistance and the conductivity of the microwave absorbing material are further improved.

The invention belongs to the technical field of composite plate manufacturing, and particularly relates to an austenitic stainless steel and carbon steel asymmetric composite blank and a manufacturing method thereof. The manufacturing method of the asymmetric composite blank of the austenitic stainless steel and the carbon steel comprises the following working procedures of blank assembly raw material preparation, blank assembly raw material surface treatment, cleaning, blank assembly and electron beam seal welding in a vacuum chamber. The manufacturing method of the asymmetric composite blank of the austenitic stainless steel and the carbon steel is simple in process, low in cost, capable of improving the blank manufacturing efficiency, suitable for mass production of products and capable of obtaining the asymmetric composite blank of the austenitic stainless steel and the carbon steel with excellent quality.

The invention relates to a functional spunlace dusting non-woven fabric and a preparation method thereof, the functional spunlace dusting non-woven fabric comprises a spunlace non-woven fabric base layer, and the technical key point is that a gum dipping coating and a dusting layer are arranged on the surface of the spunlace non-woven fabric base layer. The impregnation process and the powder scattering process are both completed after the spunlace process, that is, different from a traditional process that impregnation or powder scattering is conducted between a spunlace machine and a drying device, compared with a traditional process, the liquid carrying rate of the product is high, and the functional requirement for the surface stiffness of the product is easily met; and meanwhile, the breadth, the cloth cover style, the physical indexes and the like of the product can be better controlled. The problem that an existing non-woven fabric surface coating easily generates glue points and is uneven is solved, the non-woven fabric has waterproof, oil-proof and stiff functions, can be compounded with sponge, non-woven fabric, woven fabric and the like after being heated, and is good in compounding effect, smooth in surface after being compounded and not prone to generating wrinkles.

The invention relates to preparation equipment and a preparation method of an aluminum-plastic composite tape, the equipment comprises an unwinding support of an unwinding mechanism, a first unwinding drum, a second unwinding drum and a third unwinding drum, the first unwinding drum, the second unwinding drum and the third unwinding drum are arranged on the unwinding support, and the first unwinding drum and the third unwinding drum are used for unwinding a plastic film; the second unwinding drum is used for unwinding the aluminum strip between the first unwinding drum and the second unwinding drum; the baking mechanism is arranged on one side of the unwinding mechanism and is used for heating the unwound plastic film and the unwound aluminum strip; the conveying and hot pasting mechanism comprises a first conveying assembly arranged between the unwinding mechanism and the baking mechanism and used for conveying the aluminum strip and the plastic film into the baking mechanism, and a second conveying assembly arranged on the side, away from the unwinding mechanism, of the baking mechanism and used for conveying the aluminum-plastic composite strip out of the baking mechanism. The plastic films are unreeled to the two sides of the aluminum strip, so that the plastic films are attached to the two sides of the aluminum strip, the two sides of the aluminum strip are compounded with the plastic films in a heat mode through one-time heat pasting, and therefore the preparation efficiency of the aluminum-plastic composite strip is improved.

The invention relates to the related technical field of surfboard production, in particular to a surfboard compound machine which comprises a machine body, sliding rods are vertically arranged in sliding openings in a sliding mode, and a rubber barrel is rotationally installed between the ends, close to each other, of the two sliding rods; a triangular first abutting block is fixedly mounted on the surface of the mounting frame, a fixing plate is fixedly mounted at one end of one sliding rod, a trapezoidal second abutting block is fixedly mounted on the surface of the fixing plate through a second spring rod, and a rectangular block is fixedly mounted at the top end of a first sleeving plate; a first abutting rod is fixedly installed on the lower surface of the supporting plate, and a V-shaped opening is formed in the upper surface of the rectangular block. According to the glass fiber laminating device disclosed by the invention, under the cooperation of a first pressing block, a second pressing block, a first spring rod, a second spring rod, a rectangular block and a first pressing rod, a rubber barrel only performs laminating work on glass fibers in one direction, so that the situation that air between the glass fibers and an original board surface cannot be completely extruded out can be avoided, and the laminating effect is improved.

The present disclosure relates to the technical field of lithium-ion batteries, in particular to a hard carbon composite material and a preparation method and use thereof. The hard carbon composite material of the present disclosure has a core-shell structure. The core comprises hard carbon doped with nitrogen, and the shell comprises a phosphorus-containing compound. The core accounts for 1 %-10% of the shell by mass. In the present disclosure, the core of the hard carbon composite material is doped with nitrogen to increase the conductivity of the composite material; the shell of the hard carbon composite material is doped with the phosphorus-containing compound to improve the specific capacity and initial efficiency of the composite material by relying on the high specific capacity of phosphorus, and meanwhile, by coating the shell with the phosphorus-containing compound, the specific surface area of the porous structure of the core is reduced and thus the overall specific surface area of the hard carbon composite material is reduced. By combining the core with the shell, the obtained hard carbon composite material has excellent electrochemical properties.

The utility model discloses a compression roller unit for producing a reinforced flame-retardant adhesive tape, and relates to the technical field of adhesive tape production. The compression roller comprises a compression roller body, a supporting base plate and a set of pressure maintaining rollers, the compression roller body comprises a mandrel, a plurality of partition discs are evenly fixed to the peripheral side face of the mandrel at intervals in the axial direction, an air bag sleeve is fixed between every two adjacent partition discs, the outer surface of each air bag sleeve exceeds the corresponding partition disc, and the supporting base plate is arranged under the compression roller body in parallel. A supporting beam is arranged at the bottom of the supporting base plate, and mounting bases are fixed to the two ends of the supporting beam. According to the utility model, the roller surface of the compression roller is designed into an air bag sleeve type structure, and the air bag sleeve at the composite point is deformed under the support of the rib clamping layer in the composite pressure applying process, so that the air bag sleeve can be embedded into a gap of the rib clamping layer to apply pressure to the gap, and uniform pressure applying in the composite process is ensured; the connection strength between the layers of the adhesive tape is greatly improved, and the production quality of the adhesive tape is improved.

The utility model relates to thermal compounding equipment for a polytetrafluoroethylene microporous membrane, which comprises the thermal compounding equipment for the polytetrafluoroethylene microporous membrane. Comprising an equipment platform, a right-hand thread support, a left-hand thread support, a left-hand thread rod, a right-hand thread rod, a thread rod limiting block, a rotating handle, a left-hand thread block, a half-set lifting support, a sliding block, a sliding platform, an upper end pressing wheel platform, a lower end pressing wheel platform, an upper end pressing wheel, a lifting bolt, a tensioning wheel shaft rod, a tensioning wheel, an upper end discharging wheel, a lower end discharging wheel and a collecting wheel. The front side of the equipment platform is provided with a receiving wheel support, the side portion of the receiving wheel support is rotationally connected with the receiving wheel, the rear side of the equipment platform is provided with a discharging support, the upper portion of the discharging support is rotationally connected with the upper end discharging wheel, the interior of the discharging support is rotationally connected with the lower end discharging wheel, and the surface of the equipment platform is provided with a bolt rotating hole. And the bolt rotating hole is matched with the lifting bolt.

The invention discloses a preparation method of bamboo charcoal down feather and a down feather spraying and drying system thereof, and relates to the field of down feather preparation, and the preparation method comprises the following specific steps: a preparation stage: preparing down feather and bamboo charcoal suspension liquid; spraying and drying: spraying the bamboo charcoal suspension liquid onto the down feather through a down feather spraying and drying system, fully mixing the bamboo charcoal suspension liquid with the down feather, and then drying to obtain down feather with bamboo charcoal nano powder; and a powder removing stage: removing the bamboo charcoal powder in the down feather with the bamboo charcoal nano powder through a dust remover to obtain the bamboo charcoal down feather. By compounding the bamboo charcoal and the down feather, the down feather has the effects of deodorizing, absorbing moisture and quickly heating, and by designing a spray drying system used during compounding of the bamboo charcoal and the down feather, the compounding effect of the down feather and the bamboo charcoal is better, so that the overall quality and effect of the down feather are improved.

This invention relates to the field of nanomaterials, specifically to a metal-organic framework composite material, its preparation method, applications, and a method for oxidative removal of organic sulfur from fuel oil. The composite material comprises Ce-MOF nanomaterials and MnO2 nanomaterials, wherein the weight ratio of MnO2 nanomaterials to Ce-MOF nanomaterials is 1:(13-15). In the X-ray photoelectron spectrum of the composite material, a characteristic peak exists at 530 eV for the O 1s spectrum. The composite material of this invention exhibits good synergistic effects between MnO2 nanomaterials and Ce-MOF nanomaterials, demonstrating excellent catalytic activity and stability.

The invention discloses a composite material for manufacturing a fan blade and a preparation method of the composite material. The composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of acrylonitrile-styrene copolymer, 2 to 5 parts of acrylonitrile-butadiene-styrene copolymer, 25 to 35 parts of glass fiber, 0.1 to 0.5 part of coupling agent and 0.01 to 0.1 part of lubricant. According to the present invention, the molar ratio and the use amount of the monomers in the AS resin and the ABS resin are specifically adjusted, such that the compounding of the matrix resin and the glass fiber is well achieved, and the problems of poor fluidity, poor demolding property and poor surface smoothness of the composite material caused by the addition of the large amount of the glass fiber can be significantly improved only by adding the small amount of the ABS resin; meanwhile, the glass fibers with specific sizes are selected in a targeted manner, so that the glass fibers are dispersed more uniformly in the resin, the compounding effect of the glass fibers and the matrix resin is further improved, the corresponding performance of the composite material is improved, and large-scale production and application of the fan blade are facilitated.

The present invention belongs to the technical field of negative electrode materials, and specifically relates to a high-performance biomass-based hard carbon negative electrode material and a preparation method thereof, the preparation method comprising the following steps: pre-immersing the biomass raw material in an anhydrous ethanol / deionized water mixed solution, and obtaining clean biomass after washing and drying; then immersing in a diammonium hydrogen phosphate solution, and obtaining a biomass-based hard carbon precursor after drying, pre-oxidation cross-linking curing, pickling and other treatments; finally, obtaining a biomass-based hard carbon negative electrode material through high-temperature carbonization, purification, drying and other processes. The present invention uses diammonium hydrogen phosphate as a cross-linking curing agent and a heteroatom N and P element doping source, and obtains a biomass-based hard carbon negative electrode material through a pre-oxidation cross-linking curing reaction combined with a high-temperature carbonization process, providing a way and method for the preparation of high-capacity biomass-based hard carbon negative electrode materials, and effectively solving the problems of low loading of traditional hard carbon active substances and low stacking density.

The utility model relates to the technical field of fabric compositing, in particular to a composite structure for enhancing fabric compositing strength, which comprises a first unwinding component and a second unwinding component. A first fabric unwound by the first unwinding assembly and a second fabric unwound by the second unwinding assembly sequentially enter the compounding assembly and the drying oven and then are wound by the winding assembly, and the spraying assembly is arranged on the upper side of the first fabric between the first unwinding assembly and the compounding assembly. A first box body is arranged on the lower side of the first fabric between the spraying assembly and the compounding assembly, a first negative pressure opening is formed in the upper end face of the first box body, a second box body is arranged on the upper side of the second fabric between the compounding assembly and the drying oven, a second negative pressure opening is formed in the lower end face of the second box body, and extraction openings are formed in the first box body and the second box body; according to the air suction device, the permeation of an adhesive to the fabric can be effectively enhanced, and the composite strength of the fabric is enhanced.

The utility model discloses a manufacturing system of an elastic body, the elastic body comprises an upper layer of sheet, a lower layer of sheet and a group of elastic yarns located between the two layers of sheets, the elastic yarns are arranged at intervals, and the distance between the adjacent elastic yarns is 1.2-2.8 mm; when the elastic body is in a non-stretching state, the section size of the elastic yarn is 0.05-0.6 mm; the manufacturing system comprises a warping unit and a composite unit, wherein the warping unit comprises an unwinding assembly for unwinding a group of elastic yarns and a drawing roller assembly for drawing and warping the unwinding group of elastic yarns; and the group of elastic yarns are respectively compounded with the upper and lower sheets through a compounding unit to finally form the elastic body. A large number of elastic yarns with dense intervals are drawn and warped through the warping unit, the elastic yarns are glued after being warped, and then the elastic yarns are compounded with the upper sheet and the lower sheet respectively, so that the process is simple, the elastic yarns after being warped are uniform and stable in tension, and the compounding effect is relatively good.

The present application relates to tungsten hard alloy technical field, especially to a kind of rare earth modified tungsten hard alloy and its preparation method and application.The rare earth modified tungsten hard alloy provided by the present application mainly uses cerium oxide, yttrium oxide and titanium oxide rare earth as modified component, through the preparation of special structure to modified component, so that modified component can synergistically give full play to function, improve the overall modification effect, so that the rare earth modified tungsten hard alloy provided by the present application has high hardness and high toughness.And, by controlling the specific composition and particle size of the composite rare earth particles and the rare earth modified iron powder and other parameters, the synergistic effect between the rare earths can be further improved, and the toughness can be improved under the premise of high hardness.The composite rare earth particles and the rare earth modified iron powder in the present application also have good complex effect, which helps the effective dispersion and particle size control of the overall component, thereby ensuring the balance of hardness and toughness of the rare earth modified tungsten hard alloy.

A zinc electrodeposition cathode conductive head pouring mold comprises an upper graphite mold body and a lower graphite mold body, an aluminum filling mold cavity is milled in the middle of each graphite mold body, a pouring opening is formed in the upper portion of each graphite mold body, and a copper block configuration groove is milled in the lower portion of each graphite mold body. And mold closing fastening lugs are symmetrically arranged on the periphery of the graphite mold body. The die provided by the utility model is simple to manufacture, convenient to operate, high in yield, high in copper-aluminum compounding property and good in conductivity.

The invention belongs to the technical field of sealing material preparation, and particularly discloses a high-temperature-resistant and high-pressure-resistant sealing material and a preparation method and application thereof, and the high-temperature-resistant and high-pressure-resistant sealing material comprises the following preparation raw materials: 65-85 parts of nitrile rubber, 15-35 parts of ethylene propylene rubber, 2-5 parts of a modifier, 30-50 parts of a reinforcing material, 5-12 parts of a plasticizer, 1-2.5 parts of a vulcanizing agent, 1-2.5 parts of an assistant crosslinking agent and 2-8 parts of an active agent. The nitrile rubber and the ethylene propylene rubber are used as main raw materials, and through the action of the modifier and the use of the reinforcing material, the prepared sealing material is excellent in comprehensive performance and has a relatively good application prospect.

The present application relates to a base paper composite coating equipment and its processing technology, and relates to the base paper processing field, in order to solve the problem that the printed coating is located on the surface of the plastic film, the coating is easily scraped off to cause damage to the pattern, and the printed coating cannot directly contact with food. One base paper composite coating equipment includes a frame body, a conveying mechanism, a coating mechanism, a composite mechanism, and a cooling mechanism; the conveying mechanism is used to convey the base paper and aluminum foil; the coating mechanism includes a hot melt component for melting plastic particles and a coating component for coating liquid plastic on the base paper; the composite mechanism includes a composite roller and an extrusion roller abutting each other, and the aluminum foil and the coated base paper pass through the composite roller and the extrusion roller for extrusion and composite. The present application first adheres the aluminum foil to the base paper, and then forms a plastic film by coating the surface of the aluminum foil, so that the packaging paper can directly contact with food after processing, and the packaging paper has a variety of colors.

The utility model relates to the technical field of wood pulp gridding paper production and manufacturing, in particular to a hot-pressing composite drying device for producing wood pulp gridding paper. Comprising a pair of composite compression rollers and a closed steam heating device, wherein the composite compression rollers are used for hot-pressing and compositing an upper layer of raw material paper, a lower layer of raw material paper and a middle layer of loose gridding cloth together; the closed steam heating device is arranged on one side of a wood pulp gridding paper discharging end of the composite compression rollers; the closed steam heating device comprises a closed steam box, a wood pulp gridding paper inlet slit and a wood pulp gridding paper outlet slit, wherein the wood pulp gridding paper inlet slit and the wood pulp gridding paper outlet slit are formed in the closed steam box along the moving path of the wood pulp gridding paper. The inner space of the closed steam box is divided into an upper steam chamber and a lower steam chamber by the wood pulp grid paper entering the closed steam box, and steam supply pipes correspondingly communicated with the upper steam chamber and the lower steam chamber of the closed steam box are respectively arranged on the closed steam box. According to the utility model, the manufacturing quality of the wood pulp gridding paper can be improved, and the production energy consumption is low.

The invention discloses a clamping frame rotating mechanism and a using method thereof. The clamping frame rotating mechanism comprises a fixed frame; the clamping frame is mounted in the fixed frame; the clamping frame is rotationally mounted in the fixed frame through the rotating shaft; and the rotating mechanism is mounted on the fixed frame and can drive the clamping frame to rotate in the fixed frame. The clamping frame can rotate in place according to the angle close to the special-shaped mold, the material skin is better attached to the mold, the material skin compounding effect is good, and the product percent of pass is greatly increased.

The application relates to a preparation method and a preparation device of a composite pole piece and a lithium ion battery. The preparation method comprises the following steps: unwinding at least two rolls of solid electrolyte films according to corresponding preset tensions, and unwinding an electrode pole piece; compositing each roll of the solid electrolyte films on the electrode pole piece in parallel to obtain a composite pole piece; gaps exist between adjacent solid electrolyte films on the composite pole piece; and the composite pole piece is cut along the gaps. At least two rolls of composite pole pieces can be obtained through one-time roll pressing and composition, so that the preparation efficiency of the composite pole piece is multiplied; meanwhile, each roll of the solid electrolyte films is unwound according to the corresponding preset tension, the characteristics of each roll of the solid electrolyte films are better matched, the mutual composition and roll pressing effect of each roll of the solid electrolyte films and the electrode pole piece can be individually controlled, so that the composition effect of each roll of the composite pole piece is improved, the applicability of the preparation process is improved, and the preparation efficiency of the composite pole piece is improved.

The invention discloses a vibration reduction and noise reduction assembly, a structure and a saw blade base body, solves the problem that in the prior art, the control effect of vibration generated in the production, manufacturing and using process of components is poor, and has the beneficial effects of effectively absorbing vibration and reducing noise, and according to the specific scheme, the vibration reduction and noise reduction assembly comprises a plurality of sets of asymmetric star-shaped units; the plurality of groups of asymmetric star-shaped units are sequentially connected into a row or a column along the polar coordinate direction, or the plurality of groups of asymmetric star-shaped units are arranged in a multi-row and multi-column manner along the polar coordinate direction, and when the plurality of groups of asymmetric star-shaped units are arranged in a multi-row and multi-column manner, two adjacent asymmetric star-shaped units in each row are connected, and two adjacent asymmetric star-shaped units in each column are connected; the width of one side of the vibration and noise reduction assembly in the polar coordinate direction is larger than that of the other side; the asymmetric star-shaped unit is provided with at least four corners outwards in the first plane, the multiple corners are sequentially connected in the first plane, and part of the corners are arranged towards the first side of the asymmetric star-shaped unit.

This application relates to the field of metal strip composite technology, specifically disclosing a multilayer metal strip composite device. The device includes an unwinding roller for releasing a single-layer strip to be composited; a take-up roller for taking up the composite strip after composited operation, with a composite path defined between the take-up roller and the unwinding roller; a coating roller assembly located downstream of the unwinding roller for applying adhesive to the surface of the single-layer strip; an axial flow fan located downstream of the coating roller for drying the coated single-layer strip; a composite positioning roller located downstream of the fan for aligning the multiple layers of dried single-layer strips; and a composite pressing assembly located between the composite positioning roller and the take-up roller for flattening and hot-pressing the stacked single-layer strips. The coating roller, fan, composite positioning roller, and composite pressing assembly are sequentially arranged on the composite path. This device produces a flatter composite strip with higher interlayer bonding strength and allows for the composite of a higher number of metal strip layers.

The invention provides a flexible fiber-based organic phototransistor serum amyloid protein A sensor and a preparation method thereof. According to the method, two flexible fibers are used as base materials, one base material is immersed in a dispersed conductive polymer and inorganic nanometer oxide mixed solution, and conductive polymer fibers are obtained and used as a source electrode and a drain electrode of the phototransistor; and the other substrate is a conductive fiber, after uniform inorganic oxide nanorods grow on the surface of the conductive fiber, inorganic quantum dots are adsorbed, and the conductive fiber is used as a grid electrode of the photoelectric transistor. The grid electrode is modified by a silane coupling agent, a serum amyloid protein A antibody solution and a biocompatible solution, and then the source electrode, the drain electrode, the grid electrode and ionic gel electrolyte are assembled to prepare the fiber-based organic phototransistor serum amyloid protein A sensor. The flexible fiber-based organic electrochemical transistor sensor disclosed by the invention is simple in preparation process, low in toxicity, good in repeatability, fast in electrochemical response to serum starch protein A, high in sensitivity and low in detection lower limit.

The invention relates to the technical field of floor processing, and discloses floor processing gluing compound equipment which comprises a processing platform, the top of the processing platform is fixedly connected with a first support, and the bottom of the first support is provided with a flushing mechanism; the washing mechanism comprises a cross beam, a first sliding groove, a first sliding block, a water bucket, an electric nozzle, a top plate, a double-head motor, a first transmission shaft, a rotating disc, a second sliding block, a rotating shaft, a first movable rod, a second movable rod and a second sliding groove. The cross beam is fixedly connected to the front face of the first support, the first sliding groove is formed in the cross beam, lubricating oil is sprayed into the first sliding groove, the double-head motor is started to drive the first transmission shaft to rotate, and the first transmission shaft rotates to drive the electric nozzle to move left and right. In the left-right moving process of the electric nozzle, water in the water bucket is sprayed out downwards through the straight pipe, and stains on the floor are uniformly washed, so that the subsequent compounding effect can be improved, and then the quality of the finished floor is improved.

The present invention relates to the technical field of lithium batteries, and specifically to a modified lithium iron manganese phosphate positive electrode material, and a preparation method and application thereof. The modified lithium iron manganese phosphate positive electrode material includes a lithium iron manganese phosphate core material and a lithium iron phosphate shell coated outside the lithium iron manganese phosphate core material; the lithium iron manganese phosphate core material includes a lithium iron manganese phosphate core body, a first buffer layer coated outside the lithium iron manganese phosphate core body, and a second buffer layer coated outside the first buffer layer; the first buffer layer is mainly sintered from lithium carboxymethyl cellulose, and the second buffer layer is mainly sintered from a mixture of lithium iron phosphate and lithium carboxymethyl cellulose. The present invention designs a core-shell structure, with lithium iron manganese phosphate as the core and lithium iron phosphate as the shell, wherein the first buffer layer and the second buffer layer serve as an intermediate skeleton, which can not only effectively inhibit the dissolution of manganese, but also provide sufficient lithium ions for the positive electrode material, has excellent conductivity, first charge and discharge capacity, and has broad application prospects.

The invention discloses a method for preparing a coating based on fluorescence-induced corrosion, belongs to the technical field of coatings, and is used to solve the technical problem in the prior art that the anti-corrosion coating coated on a metal substrate fails to warn of corrosion due to the change of pH value or the increase of metal ion content after corrosion. The invention comprises the following steps: epoxy resin, modified microcapsules, silane coupling agent, dispersant and thixotropic agent are uniformly mixed. The invention uses the color change of anthocyanin at different pH values ​​to coordinate the anthocyanin with a modified fluorescent material, so that the coating has a dual warning effect. The molecular structure of the modified fluorescent material is optimized and the interaction between molecules is utilized to further improve the sensitivity of the modified fluorescent material to metal ions and the fluorescence intensity.