49results about How to "Process parameters are easy to control" patented technology

According to the special-shaped FPC and the manufacturing method thereof, the pre-formed special-shaped flexible base material layer is arranged, the shape of the pre-formed special-shaped flexible base material layer is directly matched with the special-shaped surface of a target installation space, and a circuit layer, an insulation covering layer and a special-shaped supporting layer are all attached to the special-shaped surface of the special-shaped flexible base material layer, so that the FPC does not need to be forcibly bent, twisted or stretched subsequently, and the production efficiency is improved. The problems of circuit breakage and delamination caused by stress concentration are fundamentally avoided, the structural stability of the FPC is improved, and the service life of the FPC is prolonged. The flexible circuit board is used for solving the technical problem that in order to achieve special-shaped layout, the plane of an existing flexible circuit board generally needs to be forcibly bent, twisted or stretched.

The application discloses a liquid metal-based shape-insensitive flexible conductive fabric and a preparation method and application thereof. The preparation method comprises the following steps: preparing a thermoplastic polyurethane elastomer (TPU) fiber pad and a liquid metal (LM) microsphere solution; uniformly depositing and trapping the LM microspheres in the pores of the TPU fiber pad through vacuum filtration; and hot-pressing the TPU fiber pad filled with the LM microspheres to make the LM microspheres break and fuse, so that a continuous conductive path is formed, and a flexible conductive fabric is obtained. The conductive fabric takes the TPU fiber pad as a flexible skeleton, and provides good deformation and recovery capacity; the LM is a conductive filler, and has excellent conductivity and fluidity. When various deformations such as stretching, bending, compression and twisting occur, the LM can deform synchronously with the TPU fiber skeleton and does not leak, and has good shape-insensitive conductivity. The conductive fabric can be applied to the fields of flexible high-conductive electrodes, flexible circuits, electromyographic signal monitoring, electrocardiographic signal monitoring and heat management.

The invention discloses a hot-rolled plate structure toughness prediction method and system combined with an impact energy change curve, and belongs to the technical field of metal material structure performance evaluation.The method comprises the steps that an impact test is conducted on a hot-rolled plate sample, and an impact force-displacement curve and an energy absorption-time curve are collected in real time; preprocessing the impact force-displacement curve and the energy absorption-time curve, and extracting characteristic parameters; acquiring hardness distribution data of the hot-rolled plate sample, acquiring hardness gradient data by using the hardness distribution data, and taking the hardness gradient data as a correction factor of the curve characteristics; constructing a structure toughness prediction model based on the characteristic parameters and the correction factors, and predicting the toughness grade and the structure state of the hot-rolled plate; and outputting the toughness grade and the structure state of the hot-rolled plate. According to the method, the limitation that traditional metallographic detection consumes too long time and an impact test only provides a single value is solved, double evaluation results can be obtained within 30 seconds after the impact test, and the method is suitable for rapid online quality monitoring and process adjustment of hot rolling production.

The invention belongs to the technical field of plant beverage processing, and particularly relates to a gingko, dendrobium officinale and ginseng plant beverage crushing, mixing and preparing device which comprises a mixing and preparing machine, a universal pulverizer, an ultrafine pulverizer, a freezing pulverizer and a high-pressure homogenizer, and the mixing and preparing machine comprises a material cavity, a feeding opening, a discharging opening and a stirring mechanism; the preparation method of the mixing preparation machine comprises the following preparation steps: S1, raw material pretreatment: selecting ginkgo leaves, fresh dendrobium officinale strips and ginseng rhizomes which are free of mildew and diseases and insect pests, cleaning the ginkgo leaves, drying the ginkgo leaves with hot air, removing fibrous roots from the fresh dendrobium officinale strips, cutting the fresh dendrobium officinale strips into long sections, peeling the ginseng rhizomes, and cutting the peeled ginseng rhizomes into long slices; s2, graded crushing is conducted, specifically, the pretreated ginkgo leaves are put into a universal pulverizer to be pulverized and then transferred into an ultrafine pulverizer to be further pulverized into fine particles, and the device solves the problems that when the ginkgo, dendrobium officinale and ginseng plant beverage is prepared through crushing and mixing at present, the mixing effect is poor, and the stability and taste of the beverage are directly affected.

The application relates to a device for preparing ceramic blocks by self-propagating high-temperature synthesis, and belongs to the technical field of ceramic preparation. The device comprises a ceramic block limiting device and a detonation-driven flyer device arranged above the ceramic block limiting device; after the explosion of the explosive in the detonation-driven flyer device, a flyer is driven to impact the ceramic block limiting device; the ceramic block limiting device comprises a top cover, a constraint component coaxially sleeved outside the top cover and a base connected with the constraint component; the top cover is provided with a groove capable of closely matching a convex side surface of the base, and an outer edge extending outward is arranged at the groove mouth; the constraint component is limited by the abutment of a stepped surface in the constraint component and an upper end surface of the outer edge; an ignition hole for placing an aluminized agent is arranged on the side surface of the top cover, and a through groove for placing an ignition wire in contact with the aluminized agent is arranged on the side surface of the constraint component. The device realizes omnibearing limitation of ceramic initial blanks, and is favorable for obtaining ceramic blocks with high compactness.

The present application relates to the technical field of high polymer composite material processing, and particularly relates to an online detection method and system for high polymer composite material processing and a medium, the method comprising: controlling a hot-press forming device to hot-press form mixed and uniform high polymer composite material to obtain a high polymer composite material sample to be detected; controlling a detection device installed at an outlet end of the hot-press forming device to sequentially perform rheological property detection and optical property detection on the high polymer composite material sample to obtain rheological property data and an infrared spectrum; wherein the rheological property data comprises at least one of viscosity, elastic modulus and yield stress; determining a performance parameter of the high polymer composite material sample based on the rheological property data and the infrared spectrum; determining an adjustment parameter based on the performance parameter and a preset standard parameter, and adjusting the hot-press forming device based on the adjustment parameter; and the present application can adjust process parameters in real time and improve processing efficiency.

The present application discloses a kind of hibiscus compound extract, its preparation method and application.The composite extract includes hibiscus exosome, hibiscus traditional active ingredient, snowbank flower extract and microalgae extracellular polysaccharide, wherein the hibiscus exosome and hibiscus traditional active ingredient are simultaneously extracted from hibiscus raw materials by integrated extraction process.The preparation method includes raw material pretreatment, integrated extraction, separation and purification, synergistic compounding and post-processing, and two types of active substances are efficiently and synchronously obtained by optimizing solvent, temperature, time and purification parameters.The composite extract exhibits excellent anti-aging, anti-inflammatory and moisturizing effects in cosmetics, and has excellent effects of regulating intestinal flora and enhancing immunity in functional foods.The process produces significant synergistic effect by combining specific synergistic components, and the effect is much better than single component or simple mixture, realizing the maximization of plant resources and the synergistic promotion of efficacy.

The invention provides a drug carrier based on N-acetylglucosamine, a drug preparation and a preparation method. The drug carrier based on N-acetylglucosamine comprises N-acetylglucosamine and a cross-linking agent, the cross-linking agent is a compound with an aldehyde group or a ketone group, and the aldehyde group or the ketone group reacts with the deacetylated N-acetylglucosamine to generate one or more of a hydrazide bond, a hydrazone bond or an imine bond. The drug carrier based on N-acetylglucosamine shows remarkable advantages in the aspects of particle size distribution, drug loading capacity, encapsulation efficiency and cumulative drug release rate.

The application discloses a method for recovering tin, gold and silver from high-gold-silver-tin-containing materials, and belongs to the technical field of non-ferrous metal smelting methods.The method adopts a hydrochloric acid-hydrogen peroxide system for leaching, so that tin, gold and silver enter a solution and are separated from insoluble residues; sulfur dioxide is introduced into the acid leaching solution to selectively reduce and precipitate sponge gold; after the gold is precipitated, silver chloride is precipitated by diluting the solution, and high-purity silver powder is obtained by dissolving the silver chloride in ammonia water and reducing the silver chloride by hydrazine hydrate, and the silver powder is cast into an ingot; the tin-containing solution can be recycled or neutralized to precipitate and recover tin.The method has a short process, realizes efficient separation of gold, silver and tin by selectively reducing gold by SO2 and precipitating silver by dilution, has high metal recovery rate (tin > 98.5%, gold > 99.5%, and silver > 99.5%), most of the solution is recycled, is environmentally friendly, has remarkable economic benefits, and the like.

The invention provides an E7 peptide functionalized polyimide fiber scaffold as well as a preparation method and application thereof, and relates to the technical field of medical treatment. The E7 peptide functionalized polyimide fiber scaffold provided by the invention comprises a polyimide fabric, the surface of the polyimide fabric is coated with a polydopamine coating; and the surface of the polydopamine coating is coupled with E7 peptide. According to the E7 peptide functionalized polyimide fiber scaffold provided by the invention, the E7 peptide is combined with the PI fabric, so that the E7 peptide functionalized polyimide fiber scaffold has excellent mechanical properties, thermal stability, surface hydrophilicity and biocompatibility. The BMSCs can be effectively recruited, and the osteogenic differentiation capability of the BMSCs can be enhanced. The scaffold provides a novel material selection with mechanical strength and biological activity for tissue engineering repair of MIRCT, and has clinical potential.

The application discloses a method for deep boron removal of silicon carbide powder and silicon carbide raw material, which comprises the following steps: placing the silicon carbide raw material in a plasma reaction device, inputting a working gas and applying a plasma power source, and performing low-temperature plasma pretreatment to obtain pretreated silicon carbide raw material; wherein the working gas comprises at least one of inert gas and oxygen; mixing the pretreated silicon carbide raw material with deionized water to obtain a suspension, adjusting the pH to 4-8, adding a functionalized adsorption material for adsorption treatment, and performing solid-liquid separation to obtain silicon carbide powder; wherein the functionalized adsorption material comprises an adsorption material containing hydroxyl and / or amine groups. The application combines low-temperature plasma pretreatment with deep boron removal of the functionalized adsorption material, and synergistically achieves the effect of efficient, low-consumption and environmentally-friendly boron removal. The method has the characteristics of low energy consumption, small pollution and easy mass production, and is suitable for the preparation of low-boron silicon carbide powder for semi-insulating silicon carbide crystal growth.

This invention discloses a highly stable amphotericin B liposome and its preparation method, belonging to the field of pharmaceutical formulation technology. This invention utilizes a methanol-water-chloroform ternary mixed solvent system to achieve complete molecular-level dissolution of the raw materials, eliminating the conventional drying process and directly hydrating and homogenizing. It also provides optimal formulation ratios and process parameters. The preparation method includes steps such as oil phase preparation, aqueous phase preparation, homogenization, incubation, cooling, filtration, volumetric filling, and lyophilization. This invention creatively proposes optimal formulation composition and process conditions, resulting in a product with high encapsulation efficiency, uniform particle size, and strong stability. Furthermore, the preparation process is simple and easily industrialized, solving the problems of complex preparation processes and poor stability of existing injectable amphotericin B liposomes, and possesses good clinical application value.

This invention discloses a composite strengthening process for the surface of a hot-dip galvanized molten zinc transfer pump impeller, comprising the following steps: ① impeller surface pretreatment; ② supersonic spraying of a WC+15%Co coating; ③ laser remelting: laser remelting the WC+15%Co coating; ④ precision polishing of the remelted layer: polishing the WC+15%Co coating to achieve a surface roughness <Ra0.4μm; ⑤ PVD TiCN functional coating deposition: preparing a TiCN functional coating on the WC+15%Co coating surface using physical vapor deposition, achieving a TiCN coating surface roughness <Ra0.2μm. This composite strengthening process, through the synergistic treatment of supersonic spraying, laser remelting, and PVD coating, effectively seals surface pores in cast steel and cast iron impellers while simultaneously providing excellent corrosion resistance and zinc adhesion resistance. This completely solves the technical problem of cast steel and cast iron impellers being prone to zinc adhesion and corrosion in molten zinc, significantly extending impeller service life and improving hot-dip galvanizing production efficiency.

The application discloses a yield calculation method of polarizing film coiled material, and relates to the technical field of polarizing film coiled material production, and comprises the following steps: S10, collecting first defect information in at least one process of the polarizing film coiled material; S20, selecting part or all of the collected first defect information in the corresponding process, and converting the first defect information into second defect information through a coordinate conversion calculation method, wherein the second defect information comprises the number of defects on each polarizing film sheet in a plurality of polarizing film sheets that can be formed after the polarizing film coiled material is processed. The steps S10 to S30 are sequentially executed in order, the yield determination can be completed immediately after the polarizing film coiled material is offline, the yield of the polarizing film coiled material is calculated through the yield calculation method, so that it is not necessary to wait for the cutting to be completed and then to calculate the yield, the feedback cycle of the yield can be shortened, the process parameters can be quickly adjusted to help the production line, the batch yield loss can be reduced, and the cost control can be realized from the front end of production.

This invention belongs to the field of metal coating technology, specifically relating to a gradient composite coating, its preparation method, and its application. The composite coating of this invention comprises a multilayer Al3BC / Al composite material coating, wherein the Al3BC content in the Al3BC / Al composite material is 0 wt.% to 80 wt.%, and the Al3BC content increases or decreases sequentially from the inside to the outside of the multilayer coating, wherein the multilayer comprises at least three layers. The gradient Al3BC / Al composite coating of this invention balances high reflectivity, ablation resistance, lateral heat dissipation, longitudinal heat insulation, and low internal stress in laser protection scenarios, as well as high surface hardness, low interfacial stress, and high bonding strength in wear-resistant scenarios. Furthermore, the preparation method of the gradient Al3BC / Al composite coating is simple, with controllable parameters, and suitable for mass production. This invention also provides applications of this coating in the fields of laser protection coatings and wear-resistant coatings.

The invention relates to the field of magnesium alloy surface treatment, in particular to an integrated electrophoretic coating method suitable for a magnesium alloy-special material connecting piece. The method comprises the steps of (1) magnesium matrix coating pretreatment (phosphating / micro-arc oxidation / phosphating-micro-arc oxidation composite treatment), (2) primary electrophoretic coating, (3) magnesium alloy coating sample and special material assembly (screwing / riveting) and surface conditioning treatment, and (4) secondary electrophoretic coating. Firstly, a magnesium base body is subjected to primary electrophoretic coating treatment, after the magnesium base body to be coated is assembled with a special material, the surface activity of the contact boundary of the special material is optimized through surface conditioning treatment, the paint film deposition quality of secondary electrophoresis around the assembly of the special material is improved, the paint film binding force rating of an electrophoretic composite coating obtained on the surface of the whole connecting piece through a cross-cut method is 0 level, and the overall connecting piece has the good mechanical property. The neutral salt mist resistance is more than 150 hours.

The invention discloses a composite device and method for preparing a double-metal gradient structure circular pipe through single-step deformation. The composite device comprises a first half die, a second half die, a first forming die, a second forming die, a clamp, a punch, a supporting rod and a taking-out rod, modular integrated design is adopted, and disassembly and combination are convenient. Through cooperative plastic flowing of the forming channel, the outer layer metal material and the inner layer metal material are stably combined in the one-time forming process, the problems of multi-pass machining, mold replacement and the like in a traditional technology are solved, and the production efficiency is remarkably improved. The gradient structure can effectively improve stress distribution between the inner metal layer and the outer metal layer, and the fatigue life and the overall service performance of the pipe are improved. The method is suitable for combination of various metal materials, has wide application prospects, and particularly has important application values in the fields requiring high strength, corrosion resistance, wear resistance and the like.

The invention discloses a coal gangue microwave-chemical synergistic activation method and activated coal gangue, the coal gangue microwave-chemical synergistic activation method comprises the following steps: (1) crushing coal gangue to obtain a crushed product; (2) mixing the crushed product with a composite activator, and performing microwave treatment to obtain an activated product; the composite activating agent comprises waste alkali liquor, fly ash aluminum extraction residues and water glass; and (3) drying, cooling and grinding the activated product to obtain the activated coal gangue. The microwave-chemical synergistic activation method for the coal gangue is high in activation efficiency, efficient destruction of crystal lattices of coal gangue minerals is achieved through the synergistic effect of microwaves and the composite activating agent, the activation time is shortened, the silicon-aluminum dissolution rate is increased, the silicon dissolution rate reaches 80% or above, the aluminum dissolution rate reaches 70% or above, the problem that single chemical activation is low in efficiency is solved, and the method is suitable for industrial production. And the obtained activated coal gangue product has high activity.

The application discloses a recyclable epoxy resin glass high-molecular solid adhesive, and particularly discloses a method for preparing the recyclable glass high-molecular solid adhesive, which comprises the following steps: S1, adding diglycidyl ether and diacid or acid anhydride into a tetrafluoroethylene mold, and performing first heating treatment to obtain a mixture; S2, performing second heating treatment and cooling treatment on the mixture together with a catalyst to obtain a polymer; and S3, performing slicing treatment on the polymer to obtain the solid adhesive. The method does not need a solvent and is simple in operation.

This invention discloses a drilling method, apparatus, and storage medium for preventing drill bit wire entanglement in back-drilling holes. The drilling method for preventing drill bit wire entanglement in back-drilling holes includes: acquiring historical machining data of back-drilling holes; establishing a predictive model based on the historical machining data regarding the relationship between hole position accuracy, machining parameters, and the cumulative number of machined holes; determining a safe cumulative number of machined holes to prevent drill bit wire entanglement for the current back-drilling task, based on the predictive model and a hole position accuracy threshold; and controlling the drill bit to change tools when the cumulative number of machined holes reaches the safe cumulative number of machined holes, according to the safe cumulative number of machined holes. The technical solution provided by this invention can effectively predict and prevent drill bit wire entanglement in back-drilling holes while ensuring machining efficiency and reducing costs.

The invention discloses a multi-size hole site laser cutting system and method based on dynamic focus adjustment, and belongs to the technical field of machining. The system comprises an analysis and planning module used for receiving a digital processing drawing, analyzing geometric features of hole sites, establishing radius-thickness ratio parameters according to aperture and plate thickness, constructing a multi-hole-site processing sequence in combination with a heat accumulation index of a workpiece surface, and generating a corresponding focus offset initial quantity at the same time; the dynamic focusing laser execution module is used for realizing dynamic adjustment of a laser focus in the optical axis direction through a movable zoom lens group arranged in an internal light path of the laser processing head; the monitoring module is used for collecting photoelectric signals generated in the laser machining process and relative distance signals between a laser machining head and the surface of a workpiece and transmitting the signals to the control module. And the control module is used for dynamically controlling the focus position and the laser output power based on the monitoring signal, so that the laser focus is adaptively adjusted between the perforation stage and the contour cutting stage.

The invention discloses a soil conditioner based on straw biochar and a preparation process of the soil conditioner. The fertilizer is prepared from the following raw materials in parts by weight: 10 to 20 parts of corn straw, 35 to 45 parts of ammoniated straw, 6 to 12 parts of alkaline silicon fertilizer, 48 to 52 parts of modified coke, 0.02 to 0.04 part of fermentation strain, 3 to 5 parts of humic acid, 10 to 20 parts of composite organic waste residue, 0.6 to 0.8 part of urea, 5 to 10 parts of functional compound, 2 to 4 parts of calcium chloride, 3 to 6 parts of diammonium phosphate and 5 to 10 parts of wood vinegar. The invention relates to the technical field of agricultural soil improvement. According to the soil conditioner based on straw biochar and the preparation process thereof, agricultural waste corn straw is used as a main raw material, resource recycling is achieved, the production cost is reduced, the preparation process is simple, a conventional pyrolysis technology is adopted, process parameters are easy to control, and the soil conditioner is suitable for large-scale production; meanwhile, the soil conditioner has multiple effects of improving the soil structure, improving the soil fertility and reducing the soil acidity / salinity and alkalinity, shows a good improvement effect on various soil types and crops, and is high in environmental protection benefit.

The present application belongs to the field of stainless steel surface treatment, and discloses a kind of stainless steel high-temperature oxidation resistant coating and preparation method and stainless steel product.The coating includes primer and topcoat: the primer contains micro-nano silicon sol, nano zinc / magnesium powder, potassium salt and polyethylene glycol; the topcoat contains polysiloxane, silicone oil, nano Zn powder, nano CuO powder, NiO powder, polyethylene glycol, water and leveling agent.The primer and topcoat are wet sprayed and then preheated at 100-180 DEG C and sintered at 250-350 DEG C to form a composite coating.The present application blocks diffusion by regulating and controlling film vacancy defects, and the coating has a contact angle > 90 DEG, a wear resistance > 5000 times, a weight gain ≤ 0.0141 mg / cm2 after 600 DEG C oxidation for 30 h, and excellent high-temperature oxidation resistance.

The application discloses a kind of anti-impact nylon fibre for spacesuit and its preparation method, comprising: high molecular weight nylon 66 matrix 86.0-92.0wt%, multi-dimensional nano reinforcing phase 1.2-2.0wt%, multifunctional anti-impact microsphere 4.0-7.0wt%, in-situ interface compatibilizer and crosslinking point regulator 0.5-1.2wt%, aerospace-grade multifunctional stabilizing aid: 1.0-2.8wt%;The multi-dimensional nano reinforcing phase is compounded by amino graphene and amino carbon nanotube according to mass ratio 1:3-4;The multifunctional anti-impact microsphere is hollow polysiloxane-titania composite microsphere, the anti-impact nylon fibre for spacesuit and its preparation method disclosed by the application can realize the multifunctional integration of nylon fibre, meet the demand of space suit fibre.

The application discloses a stirring mill type powder reactor for processing high specific surface area calcium hydroxide, and relates to the technical field of calcium hydroxide processing equipment. The reactor comprises a mounting base, which is provided with a stirring mill box and a reaction box, and is internally provided with a stirring mill crushing assembly and a mixing reaction assembly, respectively. High-activity calcium oxide powder is fed into the reaction box through a feeding box, and water solution and dispersants supplied by two proportioning boxes are transferred to a reaction drum through a transfer conveyor, so that full reaction is realized in cooperation with a turnover plate. After reaction, the material is fed into a stirring mill drum through a dropping pipe, is crushed by spiral stirring mill blades and grinding tooth blocks, and is output through a conveying mechanism. The application adopts an integrated structure, is matched with temperature control, sealing and pulse air supply design, improves mixing uniformity and reaction efficiency, refines powder particle size, and helps to prepare high specific surface area calcium hydroxide. The structure is compact, operation is convenient, and practicality is high.

This invention discloses a natto seaweed crisp containing Bacillus subtilis natto and its preparation method. The product, by weight percentage, comprises 65-75% dried seaweed, 20-28% compound sugar powder, 0.1-0.3% crushed natto, 2-5% sesame seeds, 0.5-1.0% edible salt, and 0.01-0.03% disodium nucleotides. The compound sugar powder consists of 60-70% glucose and 30-40% trehalose. This invention constructs a triple-protection system for bacteria protection: low-temperature crushing, a sugar powder insulation film, and segmented temperature-controlled baking. The four-layer sandwich structure, combined with the sugar powder insulation layer, results in a Bacillus subtilis natto survival rate ≥80% after baking. The compound sugar powder, combined with disodium nucleotides, neutralizes and masks the ammonia odor of natto. During preparation, the natto is crushed at 4℃, the bottom layer of seaweed is coated with a sugar powder film, and then the mixture is laid out and sheeted. It is first low-temperature shaped and then briefly high-temperature crisped. The finished product is crispy and does not crumble. When stored in a sealed container at 25℃ for 90 days, the live bacteria retention rate is ≥73%, and there is no off-odor or regeneration. It is suitable for large-scale production.

The application relates to the field of food processing and discloses a synbiotic fermented donkey milk beverage and a preparation method thereof. The method takes freeze-dried donkey milk powder as raw material, adds water to a mass fraction of 12% for re-dissolution, adds a compound probiotic accounting for 4% of the total mass of the donkey milk liquid, uniformly mixes, homogenizes at 20 MPa for 40 s, sterilizes at 95 DEG C for 10 min, inoculates 3% mixed probiotic powder after the material liquid is cooled to 42 DEG C, and ferments at 42 DEG C for 7 h to obtain a fermented milk base. The base is diluted with distilled water at a mass ratio of 1:3, 6% sucrose and 0.4% food stabilizer are added and uniformly mixed, the mixture is subjected to secondary homogenization at 20 MPa and secondary sterilization at 95 DEG C for 15 min, and then the mixture is cooled to room temperature to obtain the synbiotic fermented donkey milk beverage. The application solves the problems of easy stratification and sedimentation, prominent fishy and rancid odor of natural donkey milk in the prior art, simultaneously makes up for the defects of low digestion utilization rate and insufficient functional activity of the product, and improves the high added-value industrial utilization level of donkey milk resources.

This invention discloses an environmentally friendly and efficient dry strength agent for papermaking based on zwitterionic polymers and its preparation method, belonging to the field of papermaking chemical technology. The active ingredient of this dry strength agent is a graft copolymer of quaternized chitosan with sulfobetaine methacrylate (SBMA) and acrylamide (AM). The preparation method includes: first, reacting chitosan with 2,3-epoxypropyltrimethylammonium chloride to obtain water-soluble quaternized chitosan; then, initiating a redox initiation system to perform a graft copolymerization reaction between the quaternized chitosan and SBMA and AM, followed by precipitation and drying to obtain a solid product. This invention uses biomass chitosan as the main chain, which is green and biodegradable; the grafted SBMA side chains have an anti-polyelectrolyte effect, allowing the molecular chain to extend in high anionic interference systems such as waste paper pulp, resulting in strong anti-interference ability; simultaneously, the introduction of AM flexible segments improves paper dry strength while also enhancing flexibility and providing retention and filtration functions. Compared with existing dry strength agents, the product of this invention has superior strengthening effect, stronger adaptability, and better environmental friendliness.

The utility model discloses a continuous graphitization on-line measuring system which comprises an on-line graphitization degree detection device and a control system, the on-line graphitization degree detection device comprises a mechanical arm, a gripper, a sampler, a stirrer, a standard sample storage device, a detection container, a balance and a powder diffractometer, the output end of the mechanical arm is respectively connected with and drives the gripper, the sampler, the stirrer and the standard sample storage device to act, and the control system is respectively connected with the mechanical arm, the balance and the powder diffractometer, so that a graphite sample is grabbed by the sampler and then is put into the detection container to be mixed with a standard sample; and transferring to the powder diffractometer to detect the graphitization degree of the graphite sample. According to the utility model, the performance of the continuous graphitized material can be detected on line in real time, so that key indexes of the graphitized material can be timely controlled, the fluctuation of the indexes in a reasonable range is reduced, and the qualified rate of products is improved.

This invention belongs to the field of high-performance thermal management materials technology, and discloses a high thermal conductivity hexagonal boron nitride-based composite film and its preparation method. The composite film consists of hexagonal boron nitride (h-BN) nanosheets and graphitized carbon layers formed by heat treatment of polyhydroxy aromatic compounds, wherein the graphitized carbon layers bridge the hexagonal boron nitride nanosheets. The preparation method includes: mixing h-BN nanosheets and polyhydroxy aromatic compounds in a solvent to form a mixed dispersion; using vacuum filtration technology to self-assemble the two into a highly oriented pre-film; drying; and then heat-treating under an inert atmosphere to graphitize the polyhydroxy aromatic compounds, thereby obtaining the composite film. The in-plane thermal conductivity of the film is greater than 200 W / (m·K), and it possesses both excellent flexibility and mechanical strength, making it particularly suitable for efficient heat dissipation in 5G communications, high-power chips, and flexible electronic devices.