609 results about "Functional composite" patented technology

The invention discloses a polypyrrole / cobalt / nitrogen-doped carbon composite material with a coaxial hollow structure and a preparation method thereof, and belongs to the technical field of advanced functional composite materials. The method comprises the following steps: firstly, synthesizing a hollow polypyrrole nanotube by a soft template method; secondly, cobalt / nitrogen-doped carbon is synthesized by adopting a template guiding method; and finally, secondarily coating the outer surface of the cobalt / nitrogen-doped carbon with a polypyrrole layer by adopting an in-situ oxidative polymerization method to construct the polypyrrole / cobalt / nitrogen-doped carbon composite material with a coaxial hollow heterostructure, and the polypyrrole / cobalt / nitrogen-doped carbon composite material has a coaxial sandwich structure: the inner core is a nitrogen-doped carbon hollow tube, the middle layer is a nitrogen-doped porous carbon matrix embedded with cobalt nanoparticles, and the outer surface of the cobalt / nitrogen-doped carbon composite material is a porous carbon matrix embedded with cobalt nanoparticles. And the outer layer is a conductive polypyrrole coating layer. The preparation method provided by the invention can successfully realize in-situ confinement growth and stable combination of ZIF-67, and has the advantages of high repetition rate, high yield and simple method; by adjusting the proportion of polypyrrole in the composite material, good impedance matching and large dielectric loss can be realized, and excellent electromagnetic wave absorption performance can be obtained.

The invention relates to the technical field of antibacterial and antifouling fabrics, provides a preparation method of an antibacterial and antifouling fabric, and solves the problem of poor fabric durability caused by single functional component and lack of physical protection in the prior art. The preparation method comprises the following steps: S1, preparing MOFs loaded antibacterial fibers: blending a metal organic framework antibacterial composite nanomaterial and a polymer matrix material, and carrying out melt spinning to prepare the MOFs loaded antibacterial fibers; s2, constructing a self-cleaning functional coating: dispersing the fluorinated nanoparticles and a polymer adhesive in a solvent to prepare a self-cleaning coating solution; s2, performing surface activation treatment on the MOFs-loaded antibacterial fiber obtained in the step S1, soaking the MOFs-loaded antibacterial fiber in the self-cleaning coating liquid, and performing pulling and curing to form a bionic micro-nano structure coating on the surface of the MOFs-loaded antibacterial fiber so as to obtain a functional composite fiber; s3, spinning forming: taking the functional composite fibers obtained in the step S2 as warp yarns and / or weft yarns, and weaving to obtain the antibacterial and antifouling fabric.

The invention discloses a heat-dissipation flame-retardant composite material as well as a preparation method and application thereof, and belongs to the field of functional composite materials. The preparation method comprises the following steps: S1, mixing a ceramic filler with a phosphorus-containing modifier, and carrying out inorganic modification to obtain a first modified filler; s2, mixing the first modified filler with an organic modifier to obtain a second modified filler; s3, mixing the second modified filler with the polymer matrix to obtain the heat-dissipation flame-retardant composite material. The organic modifier is at least one of polysilazane, polysilazane and polysiloxane. The phosphorus-containing modifier and the organic modifier are adopted to modify the ceramic filler, so that the flame retardant property, the thermal stability and the high temperature resistance of the composite material are improved, the compatibility between the ceramic filler and the filler and between the filler and a polymer substrate is improved, the dispersity of the ceramic filler in the polymer substrate is improved, and the thermal resistance of the composite material is reduced; and the heat dissipation capability of the composite material is improved.

The invention relates to the field of electromagnetic functional composite materials, and particularly discloses a multi-layer composite structure flexible frequency selective surface material and a preparation method thereof. The ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced band-pass frequency selection array sequentially comprises an acrylic acid polyvinylidene fluoride organic polymer coating environment-resistant layer, a metal oxide organic film isolation layer, an ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced layer, a band-pass frequency selection layer and a packaging protection layer from top to bottom, and the band-pass frequency selection layer is a hexagonal / circular ring nested band-pass frequency selection pattern array. The packaging protection layer is formed by printing a conductive coating composed of conductive filler / polymer resin matrix, and the packaging protection layer is an ink coating. The flexible frequency selective surface material has the characteristics of light weight, high strength, salt fog / rain / ultraviolet and other severe environments, frequency selective wave transmission and multiple functions, has good gas barrier property, is beneficial to maintaining the shape of an inflatable hangar made of a skin and ensuring normal operation of radar equipment, and has good practical engineering application value.

The invention relates to a multi-modal multifunctional composite metasurface design method and device and a medium, and the method comprises the steps: carrying out the parameterized sampling of the key size of a unit structure through Latin hypercube sampling, and generating a training sample set; electromagnetic simulation is carried out on the sampled structure to obtain two-state electromagnetic response data, and a mixed variable database is obtained; according to the target response, generating a plurality of groups of candidate structures through a generator in the improved conditional variation auto-encoder generative adversarial network, screening the candidate structures through a predictor, calculating a prediction comprehensive error, and selecting a preset number of candidate structures with the minimum prediction comprehensive error to perform full-wave simulation verification; and obtaining a simulation double-state response, calculating a simulation comprehensive error, and judging the current candidate structure according to a preset comprehensive error threshold value. Compared with the prior art, the method has the advantages of multi-state collaboration, low calculation cost, high degree of freedom and the like.

The invention provides a functional composite one-dimensional metal cavity slot array antenna, which belongs to the field of antennae, and comprises a feed cavity and a cover plate located at the top of the feed cavity, a plurality of groups of periodic intermediate-frequency anti-interference metal blocks and high-frequency anti-interference metal blocks are arranged in the feed cavity, and a radiation slot is formed in the cover plate. The polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open manner to form an undulating shape; an antenna array is also provided. An anti-interference periodic structure is embedded in the feed cavity, the antenna is endowed with anti-interference capacity in multiple different frequency bands, the polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open mode to form an undulating shape, an electromagnetic signal is input into the feed cavity, linearly polarized electromagnetic waves are radiated outwards through the radiation slot, and the antenna is formed. Linear polarization electromagnetic waves are decomposed into a group of orthogonal components with the same amplitude after passing through the polarization conversion structure, a 90-degree phase difference exists between the two components, circular polarization is formed to radiate towards the space, the polarization conversion structure is simple in structure and convenient to process, and the scattering characteristic of the antenna is improved.

The invention discloses a multi-action compound server liquid cooling method, which comprises the following steps of: forming an interlayer by adopting a partition plate, placing a server in the interlayer of the partition plate, immersing the server in a flowing liquid-phase cooling liquid for cooling, arranging a spray head above the partition plate to spray a phase-change cooling liquid, and driving the phase-change cooling liquid to be subjected to phase-change gasification by utilizing air flow to take away heat. And multiple composite cooling heat dissipation is realized. According to the invention, a multi-effect composite cooling mode is adopted, the cooling efficiency and the cooling effect are better, the problem of heat explosion in a local area of a server can be solved, and the overall working efficiency and the safety of a server chip are better improved.

The invention relates to the technical field of functional composite probe material preparation, in particular to a three-core spinning technology-based bio-compatible gel probe and a preparation method thereof, and the three-core spinning technology-based bio-compatible gel probe comprises a composite skin layer and three functional core layers; the composite skin layer is composed of a sodium alginate-polydopamine-chitosan grafted copolymer in a mass ratio of 2: 1: 0.5, and contains # imgabs 0 # chondroitin sulfate and # imgabs 1 # polyoxyethylene; the three core layers are respectively a carbon nanotube-polyaniline # imgabs2 # hybrid material, a graphene-polypyrrole-boron nitride hybrid material and a # imgabs3 # polythiophene-hydroxyapatite hybrid material, and the mass ratio of the carbon material to the conductive polymer to the newly added nano material in each core layer is 1: 2: 0.3; and the diameter ratio of the skin layer to the three core layers is 1: 0.28: 0.22: 0.17. According to the invention, multichannel signal transmission is realized, the impedance is reduced by the hybrid material, and the conductivity is improved; the composite skin layer is matched with soft tissue mechanical properties, and interface bonding is stable; and the biocompatible component reduces inflammation, is suitable for acquiring nerve electrophysiological signals, and is easy for large-scale production.

The invention provides a wave-absorbing material, and belongs to the technical field of electromagnetic wave absorption. The wave-absorbing material comprises a metal reflection bottom layer, a wave-absorbing middle layer and a scattering upper layer, the wave-absorbing middle layer is made of a ferroferric oxide loaded reduced graphene oxide and epoxy resin (Fe3O4 (at) RGO / EP) composite material and used for absorbing electromagnetic wave energy, and the scattering upper layer is of a patterned metasurface structure made of chopped carbon fiber reinforced epoxy resin (SCF / EP). And a phase-regulated two-dimensional periodic array is formed. By arranging a three-layer structure of the metal reflecting layer, the Fe3O4 (at) RGO / epoxy composite wave-absorbing layer and the chopped carbon fiber scattering layer, broadband absorption and directional scattering control of electromagnetic waves within the range of 2-18 GHz are achieved, a stealth function composite material system with dissipation and deflection dual-mechanism cooperative work is formed, the structure utilizes the patterning design of the scattering layer, and the structure has the advantages that the structure is simple, the structure is compact, and the application range is wide. On the basis of the generalized Snell's law, engineering regulation and control of the radar wave reflection direction are achieved by regulating and controlling the reflection phase difference between pattern units, reflection energy is effectively deviated from the main lobe direction of a radar receiver, and therefore the reflection signal intensity of a target in a radar detection system is reduced.

The present invention belongs to the technical field of functional composite fibers, and discloses a wear-resistant nanofiber-reinforced and protected graphene fiber, a preparation method thereof and an application. The wear-resistant nanofiber-reinforced and protected graphene fiber comprises a graphene fiber bundle and nanofibers. The nanofibers coat the graphene fiber bundle in the form of a three-dimensional porous network to form a stress buffer layer; wear-resistant particles are uniformly loaded inside the three-dimensional porous network. The preparation method is as follows: fixing the surface-pretreated graphene fiber on an electrospinning nanofiber yarn machine, forming a nanofiber membrane by electrospinning and uniformly wrapping it on the surface-pretreated graphene fiber, then winding it into a roll, and then performing a hot roll treatment on the wound fiber bundle to obtain the wear-resistant nanofiber-reinforced and protected graphene fiber. The application is: used for weaving to obtain a graphene fiber fabric. The fiber prepared by the present invention and the fabric woven therefrom have excellent mechanical properties, wear resistance, electrical conductivity and thermal conductivity at the same time.

The invention belongs to the field of functional composite materials, and particularly relates to low-viscosity and high-dispersity aluminum oxide slurry and a preparation method thereof.The low-viscosity and high-dispersity aluminum oxide slurry is prepared from a newly-designed phosphono-carboxyl block copolymer and biquaternary ammonium salt polyether silane as composite modifiers; and efficient anchoring and stable dispersion of the surfaces of alumina particles are realized through the synergistic effect of molecular structures. The phosphono-carboxyl block copolymer is prepared through controllable polymerization and deprotection reaction, and strong chemical bonding is formed between a phosphono group and the surface of aluminum oxide; the biquaternary ammonium salt polyether silane is subjected to click chemical synthesis, and electrostatic adsorption of quaternary ammonium salt and the steric hindrance effect of a polyether chain are combined. When the slurry is prepared, the two modifiers are sequentially added into water, the aluminum oxide powder is added after the pH value is adjusted, finally, the isobutylene maleic anhydride copolymer and the defoaming agent are introduced, and the slurry is obtained through vacuum defoaming and filtering. The slurry prepared by the method has the characteristics of high solid content, low viscosity and good dispersion stability.

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

The invention provides a multifunctional carbon fiber lithium battery based on a sulfide composite electrolyte membrane and a preparation method and application of the multifunctional carbon fiber lithium battery, and belongs to the technical field of lithium batteries and functional composite materials. According to the invention, a nitrogen phosphide interface layer is constructed on the surface of a sulfide electrolyte membrane or a nitrogen phosphide derivative is dispersed in a bulk phase, so that the stability of an electrolyte and a metal lithium interface is effectively improved, and lithium dendrites are inhibited; and by combining the multifunctional characteristics of the carbon fiber and glass fiber woven cloth, high specific energy and light weight can be realized, the overall safety and mechanical strength are enhanced, and the composite material is suitable for various high-performance energy storage occasions.

The invention discloses a wave-absorbing material based on a bionic cobweb structure and a preparation method and application thereof, and belongs to the technical field of functional composite materials. The material comprises a bionic cobweb flat plate, the bionic cobweb flat plate has a cobweb-like structure; the cobweb-like structure is composed of n fan-like areas; meanwhile, the cobweb-like structure is formed by overlapping a framework and second fibers, the framework is formed by arranging n first fibers around the axis in the same plane in the radial direction, no cross-linking point exists between any two first fibers, a plurality of second fibers are arranged on every two adjacent first fibers, and the lengths of the second fibers are sequentially increased in the radial direction; and the second fibers in the bionic cobweb flat plate are non-continuously arranged along the circumferential direction. According to the wave-absorbing material, the periodicity, the structural anisotropy and the node enhancement of a special network structure are combined with the discontinuous conductive network design, and the excellent impedance matching and electromagnetic wave attenuation capacity is achieved at the same time.

The invention relates to a damp-proof multifunctional air bubble film packaging bag which comprises a first air bubble film and a second air bubble film which are oppositely arranged, the first air bubble film and the second air bubble film comprise the first air bubble film and the second air bubble film which are oppositely arranged, and the three edges of the first air bubble film and the three edges of the second air bubble film are connected with edge sealing layers in a sealed mode. A top sealing structure is arranged on the outer surfaces of the upper ends of the first air bubble film and the second air bubble film, a fixing strip is fixedly connected to the inner surface of the front end of the top sealing structure, and the top sealing structure comprises a second sealing strip and a first sealing strip. The packaging bag has the beneficial effects that many defects of a traditional packaging bag in the aspects of moisture resistance and sealing performance are effectively overcome, the packaging bag has excellent physical protection performance and functional characteristics through the design of the six-layer functional composite film structure, the durability of the packaging bag is greatly improved through the arrangement of the anti-abrasion layer, and the effect that damage caused by friction in the transportation process is avoided.

The invention relates to a degradable high-strength medical adhesive and a preparation method and application thereof.The medical adhesive is prepared from raw materials through reaction, the raw materials comprise a component A, a component B and a component C. The component A is trihydric alcohol and derivatives thereof and / or trihydric alcohol modified by polyethylene glycol carboxylic acid derivatives and derivatives thereof, and the component C is trihydric alcohol modified by polyethylene glycol carboxylic acid derivatives and derivatives thereof. The component B is isocyanate, amino acid or an amino acid derivative, and the component C is N-methyldiethanolamine and / or bis (2-ethoxyl)-N-methyl-N-trifluoromethyl ammonium iodide and a derivative of the bis (2-ethoxyl)-N-methyl-N-trifluoromethyl ammonium iodide; the molar ratio of-NCO groups in the component B to total-OH groups in the component A and the component C is 2: 1, and the molar ratio of the component A to the component C is (1-9): 2. The component A and the component C are mixed, heated and dissolved, then a catalyst and the component B are added, and a mixed reaction system is obtained; and cooling after the reaction is completed, adding a rheology modifier, a foaming catalyst and a stabilizer, and uniformly mixing to obtain the degradable high-strength medical adhesive which can be applied to a functional composite material.

The invention belongs to the field of functional composite fabrics, and provides a mosquito-repellent thermoplastic polyurethane composite fabric and a preparation method thereof.According to the mosquito-repellent thermoplastic polyurethane composite fabric and the preparation method thereof, the design that mosquito-repellent microcapsules of a core-shell structure are dispersed in a thermoplastic polyurethane hot melt adhesive layer is adopted, a microcapsule core layer comprises mosquito-repellent active ingredients such as icaridin, deet or dimethyl phthalate, and the mosquito-repellent active ingredients are dispersed in a thermoplastic polyurethane hot melt adhesive layer; the shell layer is made of a polyurea material and is prepared through an interfacial polymerization method, high-load stable dispersion and controllable dot matrix film forming of the microcapsule in a hot melt adhesive system are achieved, the content of the microcapsule can reach 0.5-15 wt%, the particle size is controlled to be 0.1-2.0 m, the drug loading capacity reaches 10-60 wt%, the problem that the mosquito-repelling microcapsule is prone to damage and failure in the high-temperature melting mixing and hot-pressing compounding process is solved, and the mosquito-repelling microcapsule has good application prospects. The prepared composite fabric is high in mosquito repelling rate, still keeps an effective mosquito repelling function after being washed for multiple times, and has a wide application value.

The invention discloses a high-strength, light-weight and multifunctional composite shell for a warhead, and relates to the field of ship protection, the composite shell comprises a front protection layer, a rear protection layer and a composite sandwich panel arranged between the front protection layer and the rear protection layer, the composite sandwich panel is of a honeycomb structure, and the composite sandwich panel is of a honeycomb structure. The honeycomb structure is filled with energy-absorbing substances. The energy absorption substance is shear thickening glue doped with silicon dioxide particles. By manufacturing the light multifunctional composite shell and integrating the energy absorption layer, the impact resistance and fragment penetration resistance of the shell are improved. Material distribution is optimized, light weight and structural strength are balanced, a shear thickening material (STG) is added, and multi-dimensional energy dissipation is achieved.

The invention discloses a functional composite fabric multi-layer collaborative printing and dyeing process and device, and belongs to the technical field of composite fabric printing and dyeing. The device comprises a plurality of sets of base material processing units arranged in parallel, an online alignment device, a composite unit, a quality detection unit and a digital twinning control unit, wherein each set of base material processing unit comprises an unwinding device, a plasma pretreatment device and a dynamic energy template printing and color fixing device which are sequentially arranged; the dynamic energy template printing and color fixing device is integrated with a multi-channel feeding system, the dynamic template of the pattern and the energy field applying module can be controlled by an electric signal, and synchronous printing and dyeing and targeted color fixing of base materials made of different materials are achieved. Parameters are optimized through digital twinning modeling, plasma pretreatment, pattern printing and energy color fixation are synchronously carried out on all layers of base materials, then accurate alignment and hot-pressing compounding are carried out, and a digital twinning control unit carries out whole-process cooperative control and closed-loop feedback.

The invention provides a method for preparing carbon fuel from corn straw based on a functional composite binder, and belongs to the technical field of biomass solid fuel preparation. The preparation method comprises the following steps: uniformly mixing corn stalk charcoal powder with a functional composite binder to obtain a mixture, and then carrying out hot-pressing activation molding to obtain the corn stalk charcoal fuel. The functional composite binder comprises the following raw materials: phosphoric acid, polysilicic acid, polyethylene and sodium lignin sulfonate; the addition amount of the functional composite binder in the corn stalk carbon powder is 10-15 wt.%. According to the method, the controllability of the quality of the raw material carbon is greatly improved, the functional composite binder is adopted, the forming density, falling and breaking resistance and durability of the carbon fuel are improved, the process stability and repeatability are high, and a foundation is laid for large-scale production.

The invention provides a functional composite suspended biological carrier and a preparation and application method thereof. The functional composite suspended biological carrier comprises a main base material and functional components, the main body base material is polyethylene or polypropylene, and the functional component comprises the following substances in parts by mass: 3.0 parts of polyquaternium-10 or cationic polyacrylamide, 1.5 parts of molybdenum disulfide, 2.5 parts of vinyl acetate or acrylate, 2.0 parts of nano silicon dioxide, 2-3 parts of talcum powder, 0.5 part of a silane coupling agent and 0.5 part of polyethylene wax; the total proportion of inorganic components in the carrier is less than or equal to 12%; the cross section of the carrier is a 19-hole honeycomb hollow cylinder, the diameter of the formed cylinder is 25 mm, the height of the formed cylinder is 10 mm, and the density of the carrier is 0.95-1.00 g / cm; according to the invention, the state of charge on the surface of the carrier is adjusted through the positive electricity polymer PQAS-10, the affinity with negatively charged microorganisms is enhanced, the biofilm culturing period is obviously shortened, and by introducing molybdenum disulfide and a composite conductive structure thereof, a surface micro-conductive network is established, and the microbial metabolism efficiency under aerobic and facultative conditions is improved.

The invention discloses a gelatin bacterial cellulose composite material with a lotus leaf structure as well as a preparation method and application thereof, and belongs to the technical field of packaging and fresh keeping. The preparation method comprises the following steps: accurately copying a micro-nano structure on the surface of the lotus leaf by utilizing a polydimethylsiloxane template technology, mixing a gelatin solution, a bacterial cellulose solution, glycerol and a functional active substance curcumin to obtain a film forming solution, drying the film forming solution on a template to form a film, and then removing the template. The surface of the material naturally presents a lotus leaf bionic structure, and the material is endowed with excellent hydrophobic performance without additional chemical modification or hydrophobic coating. The method is simple and convenient in process, healthy and harmless, and the prepared functional composite film integrates hydrophobicity, antibacterial property, oxidation resistance, ultraviolet shielding property and good mechanical property, is suitable for the packaging and fresh-keeping fields of food, medicines, agricultural products and the like, can effectively prolong the shelf life, and meets the development requirements of green packaging.

The invention relates to the technical field of papermaking, in particular to a preparation method of high-definition electronic screen protection paper. According to the method, regenerated cellulose fibers serve as main raw materials, functional composite fibers of a core-shell structure are constructed, a core layer is the regenerated cellulose fibers, a shell layer is a polypyrrole / graphene composite conductive layer, and the lasting antistatic performance is achieved; meanwhile, the surface-modified nano silicon dioxide aerogel particles are introduced, so that the optical performance and the mechanical strength are improved; then compounding with polyimide fibers modified by a silane coupling agent, adding a bio-based wet strength agent and a fluorocarbon defoaming agent, and carrying out the steps of plasma pretreatment, pulping, on-net papermaking, controllable drying, magnetron sputtering surface treatment and the like to prepare the protective paper. The obtained protective paper has the characteristics of being ultrathin, high in strength, high in light transmittance, lasting in antistatic property and the like, and is suitable for protection of high-end liquid crystal display screens and OLED screens.

The invention provides a synergistic flame retardant-reinforced integrated antimony trioxide substitute flame retardant and a preparation method thereof, and belongs to the technical field of flame retardants. The preparation method comprises the steps of preparing a nickel-iron compound, preparing functional composite powder and mixing. The step of preparing the nickel-iron compound comprises the following steps: heating deionized water to 60-65 DEG C, adding nickel nitrate and ferric nitrate, uniformly stirring, adding a cerium nitrate solution and citric acid, stirring for 30-35 minutes, adding ethylene glycol and a kH560 coupling agent solution, stirring for 1.5-2.0 hours, standing, aging, drying, keeping the temperature at 320-350 DEG C for 1.0-1.2 hours, and keeping the temperature at 620-630 DEG C for 3.5-4.0 hours to obtain the nickel-iron compound; the antimony trioxide substituted flame retardant disclosed by the invention can completely and equivalently replace antimony trioxide in the field, and is high in flame retardant property, mechanical property and stability.

The invention discloses a difunctional composite preparation capable of rapidly and deeply removing calcium ions and synchronously adjusting pH, and belongs to the field of sewage treatment preparations. The novel bifunctional composite preparation provided by the invention has the capability of rapidly and deeply removing Ca < 2 + > and adjusting pH by utilizing high-concentration Ca < 2 + > in-situ induced crystallization on the surface of the calcium ion-rich adsorbent powder and the buffering property of oxalic acid and phosphate radicals; the bifunctional composite preparation is put into a pressure filtrate with the influent Ca < 2 + > concentration of 1800 mg / L and the pH value of 12.4, and after static settlement is performed for 30 min, the effluent Ca < 2 + > concentration is lower than 1000 mg / L, and the pH value is lower than 9.

The invention discloses a waterproof and breathable bed sheet detection device and method, relates to the technical field of new material detection, and is particularly suitable for performance detection of a novel functional composite material waterproof and breathable bed sheet. The device comprises a detection cabin body mechanism, a dynamic air pressure monitoring system, an air source regulation and control module and an intelligent control unit, the detection cabin mechanism clamps a sample in a sealed mode through butt joint of a lower cylinder assembly and an upper cylinder assembly, the dynamic air pressure monitoring system synchronously collects air pressure of all cavities through multiple sensors, the air source regulation and control module selectively supplies air, and the intelligent control unit achieves detection mode switching and data integration. According to the method, the regional performance difference of the new material bed sheet can be accurately captured, the detection and measurement precision is improved, new material detection standardized parameters are automatically adapted, authentication and acceptance service data requirements are directly supported, the detection period is shortened, and an efficient and accurate detection scheme is provided for quality evaluation of novel composite material home textile products.

The invention relates to the technical field of polymer functional composite materials and battery heat management, in particular to an insulating heat-conducting material for a new energy battery and a preparation method of the insulating heat-conducting material. The invention aims to solve the technical problems of insufficient toughness, poor thermal conductivity and poor insulativity of an insulating heat-conducting material. The material disclosed by the invention adopts an A-B-C-B four-layer structure: the layer A is an outer layer, a matrix is homo-polypropylene, and aluminum oxide treated by a silane coupling agent is filled, so that excellent electric insulativity, electrolyte corrosion resistance and mechanical protection can be provided; the layer B is a transition toughening layer, a matrix is homo-polypropylene, polyolefin elastomer and maleic anhydride grafted polypropylene are added, and the transition toughening layer is used for releasing stress and improving toughness and interlayer bonding force; the layer C is a core heat conduction layer, homo-polypropylene serves as a base body, hexagonal boron nitride and aluminum oxide which are treated by a silane coupling agent are filled, and a main body heat conduction path is constructed. The material provided by the invention has improved mechanical flexibility, thermal conductivity and insulativity, and meets the strict requirements of new energy battery thermal management.

The invention relates to an electromagnetic shielding silicone rubber composite material with high wave absorbing property and a preparation method thereof, and belongs to the technical field of electromagnetic functional composites.The electromagnetic shielding silicone rubber composite material is prepared from, by weight, 94-99.5 parts of liquid silicone rubber and 0.5-6 parts of modified short carbon fibers; the length of the modified short carbon fiber is 0.1-5mm, the diameter of the modified short carbon fiber is 4-10mu m, the liquid silicone rubber is double-component addition type liquid silicone rubber, and the modified carbon fiber can be mixed with the liquid silicone rubber through simple mechanical stirring or a power mixer. The prepared electromagnetic shielding silicone rubber composite material not only maintains the inherent flexibility and elasticity (the elongation at break is greater than 300%) of silicone rubber, but also has low density (the density is less than 1.15 g / cm < 3 >) and wide-frequency-domain (2-40GHz) wave-absorbing property, and can be applied to the fields of aerospace, artificial intelligence, new energy and the like as a flexible electromagnetic shielding material.

The invention relates to the technical field of polymer composite materials. The invention provides a polymer composite material capable of continuously releasing negative ions. The polymer composite material is mainly prepared from the following raw materials in parts by weight: 75-90 parts of a base material, 3-15 parts of functional composite powder, 2-8 parts of a release auxiliary agent, 3-8 parts of an attenuation compensation composite auxiliary agent and 1-2 parts of other auxiliary agents. The invention also provides a preparation method of the polymer composite material capable of continuously releasing negative ions. Based on the same inventive concept, the invention also provides application of the polymer composite material capable of continuously releasing negative ions in the fields of air purification, medical care, thermoplastic elastomer product preparation, textile preparation and plastic product preparation. A microcosmic channel release mechanism and an attenuation compensation mechanism are formed on a series of polymer base materials by adopting a plurality of composite functional powders and a plurality of composite components, so that the prepared polymer composite material achieves the outstanding effect of continuously releasing high-concentration negative ions in air.

The invention discloses a magnetic control chained polyaniline-based broadband bionic wave-absorbing material and a preparation method thereof, and relates to the technical field of electromagnetic wave absorbing materials and space functional composites.The magnetic control chained polyaniline-based broadband bionic wave-absorbing material achieves multi-band impedance matching through the cooperation of orientation arrangement of magnetic nano chains and the polarization effect of a polyaniline interface, is extremely low in average reflection loss at 8-18 GHz under the thickness of 1.5 mm, and can be applied to the field of electromagnetic wave absorbing materials and space functional composites. The composite material covers an X-Ku wave band, the material density is less than or equal to 1.6 g / cm < 3 >, the mechanical strength is high, the composite material can be directly compounded on a flexible film antenna substrate, the satellite load mass is saved by more than or equal to 40%, and the wave absorbing performance attenuation is less than or equal to 5% after 100 times of alternating circulation from-180 DEG C (liquid nitrogen) to + 120 DEG C (vacuum), which is superior to that of a traditional carbon-based material (the attenuation is more than or equal to 20%); magnetic field induction and chemical synthesis are combined, the process temperature is smaller than or equal to 250 DEG C, and a flexible processing production line of an existing satellite film antenna is compatible.