3423 results about "Film coating" patented technology

The invention discloses a polyhydroxyalkanoate water-based barrier coating composition and application, and belongs to the technical field of packaging materials. The composition takes water as a dispersion medium and comprises polyhydroxyalkanoate, a plasticizer, an emulsifier and an inorganic nano filler. The stable emulsion with the volume average particle size of 400-700nm is prepared under specific proportioning and process conditions. After the emulsion is applied to a paper substrate according to the dry film coating weight of 10-12 g / m, the obtained coating shows good comprehensive performance: the oxygen permeability is not higher than 580 cm / m.d, the water vapor permeability is not higher than 290 g / m.d, and the heat sealing strength at 130 DEG C is not lower than 5.0 N / 15 mm. The biodegradable paper-based packaging film does not contain fluorine compounds, can be completely biodegraded, and provides a technical path for sustainable paper-based packaging.

The invention relates to the technical field of structure health monitoring, and discloses an underground pipe gallery structure corrosion monitoring and evaluation method based on optical fiber sensing, which comprises the following steps: constructing a composite optical fiber sensing structure which comprises a Fe-C alloy coated optical fiber and a long-period grating, synchronously monitoring the chemical component change and the structural mechanical state of the corrosion product through the photoluminescence spectrum characteristic peak displacement and the strain distribution cloud picture; measuring deviation caused by coating layer loss is dynamically corrected in combination with the change rate of the environment refractive index; a reference grating is embedded to eliminate temperature drift interference, and iron ion in-situ deposition is triggered to realize sensing interface self-repairing. According to the invention, through a multi-physical-quantity cooperative sensing and self-adaptive compensation mechanism, the problems of signal interruption and the like caused by difficult decoupling of chemical-mechanical parameters and film coating failure in traditional monitoring are avoided, the long-term stable monitoring capability of a corrosion process in a complex environment is remarkably improved, and high-precision data support is provided for safety assessment of an underground pipe gallery structure.

The invention discloses a component real-time control method and system for vacuum glow coating, and relates to the technical field of vacuum coating, firstly, in a holographic component collection stage, a sensor and monitoring equipment are used for collecting multi-dimensional data in a coating process in real time, and secondly, in a self-adaptive component adjustment stage, a chromium-nitrogen component prediction value in a vacuum cavity is calculated to obtain a chromium-nitrogen component prediction value; the concentration is compared with the target concentration to judge whether component adjustment is needed or not, then in the real-time strategy adjustment stage, when the components deviate from the target value, the nitrogen flow, bias voltage and target current are automatically adjusted through the equipment management platform to ensure the stability of the coating process, and finally, in the real-time film quality correction stage, the film quality is corrected. The film layer quality is quantified through an innovative calculation formula, the stability and consistency of chromium-nitrogen film coating are improved through closed-loop control, and the film coating process can be dynamically optimized so as to ensure that the final film layer quality meets the design requirement.

The invention relates to a spacecraft thermal control film coating defect identification method based on a multi-dimensional attention mechanism. According to the method, a correlation mapping model based on monitoring data-detection image sensitive features-coating defects is constructed, and accurate feature information extraction of the multi-type defects of the coating on the surface of the spacecraft by a convolution kernel is realized by constructing a channel-space attention mechanism convolution neural network; through modes of random rotation, mirroring, symmetry, blurring, brightness change, contrast adjustment, saturation change, Gaussian noise addition and the like, data expansion is performed on variety defect categories with relatively small sample sizes, a data set is enriched, and the problem that the sample sizes of multiple types of defects are unbalanced is solved; a lightweight module (LM-Block) and a feature enhancement module (FEM-block) based on an attention mechanism are designed on the basis of a GhostConv self-adaptive ghost convolution module, and a coating defect detection model architecture based on efficient self-adaptive convolution and channel-spatial pyramid pooling is proposed on the basis of the modules to realize accurate recognition of defects.

The invention belongs to the technical field, and discloses a film coating processing technology simulation and optimization system based on digital twinning. The system is composed of a data acquisition module, a feature recognition and analysis module, a behavioral digital twinborn simulation module, a coating uniformity evaluation module, a process parameter optimization module and a coating distribution prediction module. The method comprises the following steps: acquiring a three-dimensional roughness digital model of a base material, accurately identifying a micron-sized local rough region and extracting geometrical characteristic parameters of the micron-sized local rough region; constructing a coating growth behavior digital twinborn model based on the geometrical characteristic parameters and the process parameters, and accurately simulating the coating growth process of the local rough area; and establishing a global coating uniformity quantitative evaluation system, and optimizing a process parameter combination by applying machine learning and a genetic algorithm. The system breaks through the limitation of traditional static shadow hypothesis, real-time tracking and accurate simulation of microstructure evolution in the deposition process are achieved, and the coating growth prediction accuracy is remarkably improved.

The invention discloses an automatic transverse and longitudinal splitting device and method for a flexible assembly battery piece. The automatic transverse and longitudinal splitting device comprises a rack, a conveying mechanism, a first splitting mechanism and a second splitting mechanism, and the battery pieces are sequentially conveyed to pass through the first splitting mechanism and the second splitting mechanism through the conveying mechanism; the protection layer and the silicon wafer are fractured along the scratches from the first direction through a first wafer splitting mechanism, so that the battery piece is split into a plurality of pieces which are connected through adhesive glue; and then the protective layer and the silicon wafer are broken along the scratches from a second direction through a second wafer breaking mechanism, so that the plurality of battery pieces are split into a plurality of small battery pieces which are connected with one another through adhesive glue. According to the invention, the protective layer and the silicon wafer in the three-layer structure of the battery piece can be cracked without cracking the adhesive, so that the cracked battery piece can be kept in an adhesion state, and conditions are provided for subsequent cracking, shaping and distance-expanding film coating production. According to the invention, the automation degree is high, and the productivity and the product quality can be effectively improved.

The invention relates to electron beam evaporation coating equipment and an application method thereof. The electron beam evaporation coating equipment comprises an evaporation chamber, an electron gun system, a first vacuumizing system, a heating table mechanism, a sample table mechanism and an ion source system, the sample table mechanism is rotationally connected with the heating table mechanism, and the sample table mechanism comprises a substrate clamping part for clamping a substrate; the ion source system is connected with the top of the evaporation chamber and is used for cleaning the substrate; the first driving system is used for driving the first rotating shaft to rotate; the second driving system is used for driving the second rotating shaft to rotate; the second rotating shaft drives the heating table mechanism and the sample table mechanism to synchronously and integrally overturn; and when the sample table mechanism turns over to enable the substrate clamping part to be opposite to the ion source system, the substrate can be placed, cleaned and turned over. The device can be turned over to a specific angle, the interaction between film bases can be improved through special dip angle film coating, and the binding force is improved. The sample table mechanism can turn over to enable the substrate to directly face the ion source system.

The invention discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

The invention discloses a coating production line control method, device and equipment, a storage medium and a program product, and relates to the field of production scheduling, and the coating production line control method comprises the steps: monitoring production environment parameters and equipment operation parameters of coating production line equipment; parameter adjustment is carried out according to the production environment parameters and the equipment operation parameters through a pre-trained deep reinforcement learning model, the equipment parameter adjustment amount is obtained, and the pre-trained deep reinforcement learning model is obtained by carrying out model training on a preset initial deep reinforcement learning model based on historical coating production data obtained in advance; and adjusting the equipment operation parameters of the coating production line equipment according to the equipment parameter adjustment amount, and controlling the coating production line equipment subjected to parameter adjustment to perform coating production. The production line equipment parameters are dynamically adjusted through the deep reinforcement learning model, the problem that the film coating production quality is affected by film coating production line equipment parameter immobilization in the prior art is solved, and the film coating production quality is guaranteed.

The invention describes an apparatus that implements efficient coupling between a photonic integrated circuit (PIC) and a second optical element such as a fiber or laser, while at the same time allowing for efficient polarization management and / or optical isolation. It enables the packaging of PICs with large single mode fiber counts and in- and out-coupling of light with arbitrary polarization. The apparatus comprises a glass interposer that contains at least one polarization selective element together with a pair of lenses transforming a beam profile between the 2nd optical element and a polarization selective coupler on the PIC. The invention also comprises a method for fabricating the apparatus based on a subassembly of building blocks that are manufactured using wafer-scale high-precision glass-molding and surface treatment(s) such as thin-film coating.

The invention relates to the technical field of optical elements, and discloses an optical film manufacturing device and method.The manufacturing device comprises a machine box, a material table is arranged in the machine box and used for containing a beaker containing a film coating solution, and a control box is further integrated on the machine box; the clamp is used for clamping a substrate to be coated; the linear telescopic electric cylinder is used for driving the clamp to move up and down; the swing frame is used for mounting the linear telescopic electric cylinder; the swinging driving mechanism is used for driving the swinging frame to perform pendulum swinging; a plurality of heating wires are arranged in the arc-shaped heating box; and the supporting frame is used for mounting the swinging driving mechanism. The manufacturing method adopts the manufacturing device to manufacture the optical film ear. The technical problems that in the prior art, in the multi-time multi-layer film coating process of an optical film manufacturing device, the film coating time is long, and the film coating uniformity is affected are solved, the film coating time is shortened in the optical film manufacturing process, drying and heating treatment can be rapidly conducted after the film is lifted, and the film coating uniformity is guaranteed.

The invention discloses a copolyimide film with low dielectric constant and low thermal expansion coefficient and a preparation method thereof, and the preparation method comprises the following steps: reacting 0.019-0.021 mol of aromatic dianhydride and 0.017-0.023 mol of diamine unit in 0.45-0.48 mol of solvent, then adding 0.0004 mol of end-capping reagent dissolved in 0.13-0.15 mol of solvent, and reacting to prepare polyamide acid with a main chain containing o-hydroxyl; the diamine unit comprises 10-40 mol% of a monomer with a main chain containing o-hydroxyl and the balance of aromatic diamine; performing film coating and thermal imidization on polyamide acid to prepare a polyimide film; and heating to carry out thermal rearrangement reaction on the o-hydroxyl to obtain the copolyimide film with the main chain containing the oxazole ring. The dielectric constant of the prepared copolyimide film is 2.7-3.0, and the thermal expansion coefficient of the copolyimide film is 19.5-26.5 ppm / K.

The invention discloses a postharvest mango preservation method based on chitosan, citric acid and electron beam irradiation, and the method specifically comprises the following steps: dissolving chitosan with the deacetylation degree of more than or equal to 85% in a 0.7-0.8% citric acid solution, and adjusting the pH value to 4.4-4.6 to prepare a film coating solution; the method comprises the following steps: dipping mangoes, drying to form a continuous coating film, packaging, carrying out 380-440Gy double-sided irradiation treatment, and finally storing in a storage environment with the temperature of 11 + / -1 DEG C and the humidity of 85 + / -5%. According to the method, through synergistic antibiosis of chitosan and citric acid, low-dose irradiation precise sterilization and low-temperature microenvironment regulation and control, the rotting rate and browning degree of the harvested mangoes are effectively reduced, the storage period is prolonged, the fruit hardness, vitamin C and other nutritional ingredients are maintained, and the method is suitable for large-scale postharvest preservation and long-distance storage and transportation of the mangoes.

The invention relates to the technical field of seedling transplanting equipment, and provides a ridging mulch applicator convenient for high-quality planting, comprising a frame which moves on a ridge by means of an external power source; the rotary tillage unit is rotationally arranged relative to the rack, rotates by means of an external power source and is used for performing rotary tillage and soil loosening on the ridge land; the ridge fixing piece is arranged on the rack, the ridge fixing piece is located behind the rotary tillage unit when viewed in the moving direction of the rack, and after the rack moves, the ridge fixing piece forms an inserting table used for inserting seedlings on the ridge land; the soil guide part is arranged on the rack and located above the ridge fixing part, and the soil guide part is used for conveying soil raised by the rotary tillage unit in a rotary tillage mode to the position above the ridge fixing part; according to the technical scheme, the problem that potato seedlings are dead and lack of seedlings when the broken opening of a mulching film is not blocked or blocked tightly during seedling insertion in the prior art is solved.

The multidirectional rotating workpiece rotating stand comprises a fixed gear, a driving rotating disc and a plurality of planet carriers, the fixed gear is fixedly arranged, the driving rotating disc is rotationally arranged, and the planet carriers are installed on the driving rotating disc; the planet carrier comprises a fixed shaft, a rotary shell, a driven gear and a plurality of layers of hanging rods, the fixed shaft is fixedly installed on the driving rotary disc, the rotary shell is rotatably installed on the driving rotary disc, the rotation center of the rotary shell coincides with the axis of the fixed shaft, the driven gear is fixedly installed on the rotary shell, and the driven gear is meshed with the fixed gear; a fixed bevel gear and an inert bevel gear are arranged corresponding to each layer of hanging rod, the fixed bevel gear is fixedly connected to the fixed shaft, the inert bevel gear is rotationally connected to the inner side of the rotary shell and meshed with the fixed bevel gear, the hanging rods are rotationally arranged on the rotary shell and incline outwards, and output bevel gears meshed with the inert bevel gear are arranged on the hanging rods. According to the invention, uniform coating of a workpiece with a complex coating surface can be better realized.

The invention discloses a multifunctional concrete ground construction device and a using method thereof. The multifunctional concrete ground construction device comprises a vehicle body part; the vibration flattening parts are symmetrically installed on the two sides of the front portion of the vehicle body part and used for carrying out vibration flattening construction operation; the screw rod sliding rail part is mounted at the upper part of the vehicle body part; the vibrating main body supporting seat part comprises a base fixed on a bearing table in the screw rod sliding rail part and a rotating table rotationally mounted at the top of the base; the vibrating platform part comprises a vibrator bearing platform fixed on the rotating platform, a vibrator mounted at the front end of the vibrator bearing platform, and a gravity center adjusting mechanism mounted at the rear end of the vibrator bearing platform; the troweling part is used for troweling the concrete ground; and the film covering part is used for carrying out film covering treatment on the concrete surface. The multifunctional concrete construction machine has multiple functions of vibration, vibration leveling, troweling, film covering, water spraying and floor paint coating, and the problems that the concrete construction efficiency is low, the cost of labor needed by construction is high, and the working intensity of labor is large are solved.

The invention discloses a coating device, a coating uniformity correction method and an optical device. The coating device comprises a coating workpiece disc, a first rotating mechanism, a coating source and a target coating correction plate, the first rotating mechanism is used for driving the coating workpiece disc to rotate; the film coating workpiece disc comprises a film coating surface facing one side of the film coating source; the plurality of substrates are positioned on the coating film surface; the target coating correction plate is positioned between the coating source and the coating workpiece disc; the target coating correction plate comprises a plurality of shielding parts, and the shielding parts are symmetrical about the central axis of the target coating correction plate; the coating source is used for gasifying the coating material, and the target coating correction plate prevents part of the coating material from being deposited on the surface of the substrate. By adopting the technical means, a uniform and compact dielectric film with an approximately rectangular effective area can be plated on the substrate, the film plating uniformity of the substrate is ensured, the product performance is further improved, and the film plating efficiency is high.

The invention discloses a crystal resonator sputter coating device and a preparation method of a crystal resonator, and belongs to the field of electronic components, the crystal resonator sputter coating device comprises a bottom plate, a lower electrode mask plate, a positioning plate, an upper electrode mask plate and a magnetic cover plate in sequence, the positioning plate is provided with a wafer positioning groove, a wafer is installed in the wafer positioning groove, and the magnetic cover plate is provided with a magnet. The upper electrode mask plate and the lower electrode mask plate are both provided with electrode holes, the thickness of the positioning plate is recorded as h < definite >, and one surface of at least one of the upper electrode mask plate and the lower electrode mask plate, which faces a wafer, is provided with a diffusion prevention bulge for preventing diffusion of electrode particles during film coating, and the thickness of the diffusion prevention bulge is recorded as h < definite >. The size of the dispersion preventing protrusion is matched with the size of the wafer positioning groove, the dispersion preventing protrusion is located in the wafer positioning groove during assembly, the thickness of the wafer is recorded as h wafer, and h wafer lt is smaller than or equal to 0.017 mm; and h, setting. The sputtering coating device solves the problem of electrode diffusion of the high-frequency crystal resonator in the existing sputtering coating device for the crystal resonator due to too small wafer thickness.

The utility model relates to the field of mattress production equipment, in particular to a mattress packaging line which comprises a film covering mechanism, a folding mechanism, a rolling and pressing mechanism and a stacking mechanism which are sequentially arranged, the stacking mechanism comprises a V-shaped material supporting frame, a lifting assembly and a translation assembly, a material pushing plate is arranged in the V-shaped material supporting frame, and a material stacking frame is arranged on one side of the V-shaped material supporting frame. The translation assembly is fixed to the top of the lifting assembly, the outer side of a mattress is coated with an adhesive film through the film coating mechanism, the mattress is folded in half through the folding mechanism, the mattress is rolled and pressed into a columnar long roll through the rolling and pressing mechanism, and finally the rolled mattress is blanked and falls onto the V-shaped material supporting frame, so that the rolled mattress is prevented from rolling, the production reliability is improved, and the production efficiency is improved. The roll-shaped mattresses are pushed into the material stacking frame through the material pushing plate, the V-shaped material supporting frame is driven to horizontally move through the translation assembly, the V-shaped material supporting frame is driven to ascend and descend through the lifting assembly, stacking of the roll-shaped mattresses at different horizontal positions and different heights is achieved, the automation degree is high, and the production efficiency is improved.

The invention relates to the technical field of rust-proof treatment of metal products, in particular to a rust-proof discoloration-proof packaging system and method for a bronze-plated tire bead wire. The system sequentially comprises a cleaning unit, a surface treatment unit, a drying box, a film coating device, a cooling unit, a post-treatment unit, a take-up device and a packaging system according to the process. The core of the process method is as follows: the steel wire is immediately coated with a special antirust film coating agent to be cured by using waste heat generated after the steel wire is dried, and the film coating agent comprises water-based resin, a silane coupling agent, a conductive polymer, a nano filler and benzotriazole; during packaging, an intelligent packaging system with a built-in humidity response humidity control bag is adopted, and the humidity control bag can automatically release inert gas and a moisture absorbent when the environment humidity reaches a preset threshold value. Multiple synergistic protection on the surface of the steel wire is achieved, the anti-rust period is remarkably prolonged to 12 months or above through dynamic humidity control, meanwhile, the bonding performance and the retention rate of the steel wire and rubber are improved, and energy conservation and environment protection are achieved.

The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to a meloabalin besylate double-release preparation and a preparation method thereof. Comprising a quick-release pellet and a sustained-release pellet, and the quick-release pellet and the sustained-release pellet are wrapped in a hollow capsule; the quick-release pellet comprises a quick-release blank pellet core, a quick-release drug layer and a quick-release film coating layer; the sustained-release pellet comprises a sustained-release blank pellet core, a sustained-release drug layer, a sustained-release layer and a sustained-release film coating layer. According to the invention, the stable blood concentration is obtained while the medicine effect takes effect quickly, the medicine taking frequency is reduced, convenience is brought to patients, and the compliance is improved. The invention also provides a preparation method thereof.

The utility model relates to the technical field of storage battery processing, in particular to film coating equipment for storage battery processing. Comprising a rack and an auxiliary device, the auxiliary device comprises a guide rail, a sliding seat, feeding servo motors, feeding lead screws, a conveying assembly, a rotating assembly and an abutting assembly, when a storage battery is clamped, the storage battery is placed between the rotating assembly and the abutting assembly, then the feeding servo motors installed on the two sides act respectively to drive the feeding lead screws to rotate, and the conveying assembly conveys the storage battery. According to the automatic clamping device for the storage battery film coating machine, the symmetrically-installed sliding seats are close to each other and automatically clamped, then film conveying is conducted through the conveying assembly, rotation is achieved through the rotating assembly, and winding film coating is conducted, so that automatic clamping can be achieved when storage battery film coating machining is conducted, and production, machining and use of large-batch products are facilitated.

A film coating clamp for plastic lens processing relates to the technical field of lens processing and comprises a base, supporting seats are fixed at the left end and the right end of the base, a supporting unit is mounted in the middle of the base, a mounting seat driving mechanism is mounted on each supporting seat, and a mounting seat is arranged at the end of each mounting seat driving mechanism. A servo motor is installed on the side face of the installation base, a clamp is fixed to an output shaft of the servo motor, the clamp is a rubber clamp, a connecting rod is fixed to the side face of the installation base, scales are evenly arranged on the connecting rod, the connecting rod is connected with the supporting base in a left-right sliding mode, and a limiting mechanism is arranged on the connecting rod. According to the plastic lens fixing device, the trouble that a fixing disc needs to be manually rotated to drive a clamping plate to work is avoided, a plastic lens can be turned over in the fixing process, the trouble that the plastic lens needs to be turned over after being fixed is removed is avoided, time and labor are saved, and therefore the machining efficiency is improved.

The invention relates to the technical field of preparation of high-performance fiber concrete, and discloses preparation of PS particle-doped high-performance fiber concrete, which comprises the following steps: step 1, preparing a UHPC premix; 2, the UHPC premix is subjected to dry stirring and uniform mixing; step 3, keeping the stirrer running, adding water into the mixed and stirred powder, and continuously stirring; 4, dispersing the steel fibers, adding the dispersed steel fibers into the stirring pot, and continuously stirring; step 5, dispersing PS particles, putting the dispersed PS particles into the stirring pot, and continuously stirring for a preset time; 6, after stirring is completed, the mixture is added into the steel mold coated with the film coating agent; and 7, after pouring is completed, curing is conducted after the test piece is subjected to standing forming and demolding. According to the scheme, a proper amount of PS particles are doped, so that the cost of the steel fibers is reduced, meanwhile, the PS particles can serve as an artificial defect, increase the cracking tendency of a UHPC matrix when bearing tensile stress and also can serve as a micro stirrer to promote uniform dispersion of the steel fibers, and the mechanical property of the UHPC is greatly improved.

A periscopic camera module disclosed by the present invention comprises a lens assembly, a motor assembly and an imaging module, the imaging module comprises an optical filter, a photosensitive chip and a circuit board, the periscopic camera module is characterized in that the periscopic camera module further comprises a reflector, the reflector is obliquely arranged behind the lens assembly, and a first preset angle is formed between the reflector and the optical axis of the lens; the imaging module is arranged in the reflecting light path direction of the reflecting mirror, the reflecting mirror comprises a substrate and a reflecting layer on the surface of the substrate, the reflecting layer can be configured to be a film coating medium, the film coating medium is an aluminum film or a silver film, the reflectivity of the film coating medium is larger than 95%, and the reflection bandwidth is the wavelength of 420-680 nm. According to the periscopic camera module provided by the invention, a prism can be replaced by the reflecting mirror, so that the module cost is reduced, and meanwhile, the effect of reducing the thickness of the module is achieved by utilizing the special angle arrangement of the reflecting mirror and the photosensitive chip.

The invention relates to a production system and a production method of a polyhydroxyalkanoate paper-plastic composite material. The production system comprises an unwinding mechanism, a coating device, a drying device, a pressing device, a winding mechanism and a post-processing device, wherein the unwinding mechanism is used for conveying base material paper; the coating device is used for coating the base material paper conveyed out by the unwinding mechanism and comprises an extrusion type coating machine head; the drying device is used for heating and drying the coated base material paper; the pressing device is used for pressing the dried base material paper; the winding mechanism is used for storing the laminated base material paper; and the post-processing device is used for performing post-processing on the laminated base material paper, and the post-processing device comprises an elastic roll mechanism and a drying box. According to the preparation method, an extrusion type coating process is adopted, extrusion granulation, high-temperature melt extrusion casting or film spraying forming of the polyhydroxyalkanoate is not needed, the degradation risk of the polyhydroxyalkanoate is avoided, degradation of the polyhydroxyalkanoate is reduced, and the production cost is reduced.

The invention belongs to the technical field of sandy soil reinforcement, and relates to a sandy soil reinforcement method combining modified chitosan film coating and cementation with biomimetic mineralization and application, the sandy soil reinforcement method comprises the following steps: S1, chitosan is subjected to swelling, alkalization, carboxymethylation and refining treatment to obtain modified chitosan; s2, respectively preparing a calcium chloride solution and a sodium carbonate solution with the same concentration; a calcium chloride solution is a cementing solution A; adding modified chitosan into a sodium carbonate solution, and uniformly stirring to form a cementing solution B; s3, the cementing liquid A is sprayed to the sandy soil, then the cementing liquid B is sprayed, and primary cementing is completed; carrying out circulating cementing for 5-20 times according to the spraying mode; and then air drying is conducted to complete sandy soil reinforcement. According to the invention, the agglomeration among calcium carbonate particles is enhanced by utilizing the cementing, film covering, mineralized crystal form adjusting and filling coupling effects of the modified chitosan, so that the calcium carbonate particles form effective cementing connection among sand particles, thereby improving the mechanical properties of the sand.

The invention relates to the field of positive electrode materials, in particular to a lithium manganese iron phosphate / carbon fiber composite positive electrode material and a preparation method thereof, which are used for solving the problems of poor electronic conductivity of lithium manganese iron phosphate and the like. The preparation method comprises the following steps: firstly, carrying out graft modification and ZrO2 film coating on carbon fibers, and then compounding the modified carbon fibers with lithium iron manganese phosphate to obtain the lithium iron manganese phosphate / carbon fiber composite positive electrode material. The lithium manganese iron phosphate / carbon fiber composite positive electrode material can greatly improve the electronic conductivity and improve the rate capability; active substance dissolution and side reaction can be inhibited, and the cycling stability is improved; a lithium ion diffusion channel can be optimized, and the ion conduction efficiency is improved; the electrode mechanical performance can be enhanced, and the structural reliability is improved. Meanwhile, the advantages of all the components are exerted, and finally the electrochemical performance and structural stability of the composite positive electrode are remarkably improved.

The invention provides a preparation process of an environment-friendly film coating, and belongs to the technical field of coatings, the preparation process comprises the following steps: S1, mixing 3-4 parts of epoxy resin, 25-28 parts of polyurethane emulsion, 35-38 parts of water-based acrylic resin emulsion, 0.5-1 part of a curing agent, 0.5-1 part of an accelerant, 2-2.5 parts of a dispersing agent, 0.3-0.5 part of a wetting agent and 6-8 parts of PVA emulsion to obtain a first mixture; s2, adding 4-5 parts of fluorine-doped hexagonal boron nitride and 10-12 parts of nano aluminum oxide into the first mixture, and stirring to obtain a second mixture; adding 2-3 parts of polyoxyethylene, 0.4-0.5 part of citric acid, 2-4 parts of a coalescing agent and 0.5-1 part of a defoaming agent into the second mixture, and stirring to obtain a coating; s3, performing plasma activation on the PET film to obtain a pretreated PET film; and S4, uniformly coating the pretreated PET film with the coating, and curing to obtain the environment-friendly film coating. The ink-jet adhesive force is improved, and meanwhile, the mechanical property of a PET film coated with a coating is improved.

The invention discloses pole piece processing equipment, and relates to the technical field of battery pole piece processing, and the pole piece processing equipment is characterized in that a conveying device conveys a pole piece material belt to pass through a cleaning position, a film covering position and a glue dispensing position in sequence; the laser assembly is arranged at the cleaning position and used for cleaning a pole piece material belt and forming a plurality of pole lug grooves, and each pole lug groove is provided with a dispensing forming area; the film covering device comprises a film supply assembly and an isolating film, the film supply assembly is arranged at the film covering position and used for providing the isolating film, the isolating film and the pole piece material belt move synchronously and are attached to the pole piece material belt, a plurality of through holes are formed in the isolating film, and the through holes are matched with the dispensing forming areas in a one-to-one correspondence mode; the glue dispensing mechanism is arranged at the glue dispensing position and used for spraying glue, the glue covers the glue dispensing forming area, at least part of the glue extends to the isolating membrane, and the glue is formed into a glue layer in the glue dispensing forming area. The pole piece processing equipment provided by the technical scheme of the invention can control the shape of the adhesive layer and improve the quality of the battery.