429results about "Physical treatment" patented technology

The invention belongs to the technical field of personal protection equipment, and particularly relates to a lightweight cut-resistant four-dimensional structure fabric based on high-performance composite fibers and a preparation method of the lightweight cut-resistant four-dimensional structure fabric. The structure is based on a high-performance composite fiber material and a nano silicon carbide embedding technology of high-performance polyethylene fibers, the hardness bottleneck of a single material is broken through, and multi-fiber compatibility is improved through cooperation of polyurethane fiber surface activation and polyurethane fiber anti-melting modification. The gradient twist core sheath yarn is a high-performance composite yarn, and the strength and the flexibility are balanced. In the aspect of the oversleeve fabric structure, a three-dimensional protection system comprising a honeycomb structure, a silica gel liner and a skin-friendly inner layer is adopted, so that the integration of multiple functions of hydrophobicity, fusion resistance and buffering of a light-weight cut-resistant material is realized. Under the EN 388 standard, 5-level cutting prevention can be achieved, a single high-performance polyethylene fiber cutting prevention oversleeve can only reach 3-4 levels, the weight of the composite fiber material is reduced by 40% compared with that of a full aramid fiber oversleeve, the thickness is reduced by 25%, and the composite fiber material can be suitable for complex scenes such as petroleum and electric power.

The invention discloses a preparation process of cutting-resistant and puncture-proof protective gloves, and belongs to the technical field of preparation methods of protective gloves. According to the technology, the four steps of pretreatment, composite coating material dipping, dipping of different butadiene-acrylonitrile rubber latexes and partitioned vulcanization treatment are adopted, balance of protection performance and wearing comfort is achieved through combination of technology optimization and material innovation, the cutting resistance of the prepared protective gloves reaches the grade E of the GB24541-2022 standard, the puncture resistance and the tear resistance both reach the grade 4, and the service life of the protective gloves is prolonged. And the composite material is good in air permeability and excellent in durability, is particularly suitable for high-risk operation scenes such as military, security and metal processing, and has remarkable technical progress and industrialization value.

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The invention relates to a preparation method of an insect-proof lyocell fiber, and belongs to a functional fiber preparation method in the chemical field. The invention provides a bio-based microcell barrier packaging solution aiming at three major defects of easy breakage, non-environmental response release and toxicity of a chemical cross-linking agent in the existing microcapsule coating. The pH response type microcapsule is constructed through double-layer alternate self-assembly of chitosan and phytic acid, a compact network barrier is formed by electrostatic crosslinking of positive and negative charges, and the structural stability is enhanced by combining a natural cross-linking agent genipin; in the fiber loading stage, plasma pretreatment is adopted to increase the surface roughness, vacuum negative pressure drives microcapsule permeation, and steam setting promotes anchoring setting. Core innovations include an intelligent release mechanism, washability breakthrough, ecological safety and actually measured performance display. The method solves the problem that the lyocell fiber is difficult to decompose the permethrin in the NMMO solvent system, and has the advantages of efficient protection and environmental friendliness.

The application discloses a medical natural antibacterial and antiviral mildew-proof wet non-woven fabric and a preparation method and application thereof, and belongs to the technical field of medical polymer materials and textiles. The non-woven fabric is prepared from the following raw materials: polyethylene terephthalate long fibers, polyethylene terephthalate short fibers, vinylon fibers and natural antibacterial and antiviral ultraviolet slow-release glue solution. The non-woven fabric is endowed with natural and non-toxic antibacterial and antiviral effects by using the extract of Chinese herbal medicine effective components. Meanwhile, the mechanical properties and the antibacterial and antiviral capacity of the non-woven fabric can be effectively improved by adding nano materials with far infrared function after surface modification to prepare high-efficiency natural antibacterial and antiviral ultraviolet slow-release microcapsule glue solution. The method improves the added value and application field of the wet non-woven fabric and is convenient for large-scale processing and production. The prepared wet non-woven fabric has excellent performance indexes, good air permeability and an antibacterial and antiviral efficiency of 99.99%.

The invention belongs to the technical field of textile processing, and provides an array spinning reinforced composite yarn and a spinning method. In the invention, the nano array is generated by performing multi-jet polarization and ionization on the unsaturated solution by a needle-free electrostatic array ionization device, and the surface tension and ionization state of the unsaturated solution are changed by controlling the concentration and electrostatic voltage of the unsaturated solution. The jet flow and the liquid drops are charged in the electric field and break through the Rayleigh limit to be broken to form the nano array. After being embedded into a micron fiber net, the nano arrays are stably anchored on the surfaces of micron fibers through extremely high Van der Waals force and hydrogen bonds, the specific surface area of the micron fibers and the contact area between the fibers are increased, fiber cohesion and friction in yarn are enhanced, and mechanical enhancement (especially breaking strength) and quality improvement of regenerated fiber textiles are achieved.

This invention relates to smart textile wearable device with embedded yarn sensors and a computing device comprising a processor and a computer readable medium having encoded thereon a machine learning program that gathers sensor data from the wearable device and generates health parameter output data or real time or long-term feedback to a user for interaction, health and exercise purposes.

The invention belongs to the technical field of biomedical materials, and particularly relates to a poly-4-methyl-1-pentene (PMP) gas-blood exchange membrane for an extracorporeal membrane oxygenation (ECMO) system, which realizes a long-acting antithrombotic function through a bionic interface construction technology. The invention aims to provide a bionic antithrombotic PMP gas-blood exchange membrane based on zwitter-ion gradient grafting, and through material and process innovation, the following problems existing in a traditional ECMO gas-blood exchange membrane: an antithrombotic coating is easy to fall off, and the long-term effect is insufficient; the risk of blood injury caused by dependence on heparin or anticoagulants; and the surface modification process destroys the membrane pore structure and air permeability.

Typical commercial surface treatments for continuous carbon fibers are often unavailable for discontinuous fibers. As such, there is little variety of chopped fiber surfaces leading to non-ideal coating solutions which result in poor interfacial compatibility between fibers and a composite matrix. A method of applying a highly effective coating using a high throughput technique for chopped carbon fibers. The method provides the ability to tune both the coating thickness and chemical functionality using processing parameters. The coatings are evaluated using X-ray photoelectron spectroscopy (XPS) for uniformity and composition. Using this technique, thermoplastic composites are highlighted showing an increase in interfacial shear strength (IFSS) of 25 MPa. This process shows promise for increasing the throughput of surface treatment of chopped fiber on the industrial scale.

The invention relates to the technical field of polymer absorbing materials, in particular to high-liquid-conductivity composite sodium polyacrylate water-absorbent resin, a preparation method and application. The water-absorbent resin is composed of a sodium polyacrylate matrix, low-melting-point ES fibers (accounting for 5-15% of the mass) activated through plasma or alkali etching and a surface cross-linking agent (such as glycerol and polyethylene glycol). The method comprises the following steps: melting a fiber sheath layer to coat SAP particles through one-time heat treatment (120-150 DEG C, 30-60 minutes), and meanwhile, constructing a surface chemical network by a cross-linking agent to form a physical-chemical dual structure. The composite SAP has excellent transverse drainage rate, wet compressive strength and circulation structure integrity, the liquid distribution efficiency and stability of the absorption core layer are remarkably improved, and the composite SAP is suitable for the field of hygienic products such as paper diapers and sanitary towels.

The invention belongs to the technical field of plastic woven bags, and particularly relates to a corrosion-resistant and fracture-resistant plastic woven bag which is prepared from the following raw materials: modified polypropylene particles, a silane coupling agent, modified lignin fiber powder, a corrosion-resistant agent, an antioxidant, a corrosion-resistant synergist, a lubricant and a flexibilizer. The preparation method comprises the following steps: S1, stirring the modified polypropylene particles, the silane coupling agent, the modified lignin fiber powder, the corrosion-resistant agent, the antioxidant, the corrosion-resistant synergist, the lubricant and the flexibilizer, then extruding, cutting into blank filaments, and drawing into flat filaments; s2, fixing the flat filament on a plasma processing device, and starting the plasma processing device to obtain a modified flat filament; and S3, the modified flat filaments are woven, and the corrosion-resistant and fracture-resistant plastic woven bag is obtained. The problems that in the prior art, woven bags are poor in interface compatibility, corrosive media are prone to permeating, and the fracture resistance is insufficient can be solved, and the mechanical property and the corrosion resistance of the polypropylene woven bag are remarkably improved.

The invention belongs to the technical field of carbon fiber surface treatment, and particularly relates to a cross-linked polymer modified carbon fiber, a preparation method and a composite material. Aiming at the problem of insufficient interface bonding force between the existing polyarylsulfone / ketone thermoplastic sizing agent and the carbon fiber, the core of the invention is to apply a polyarylsulfone / ketone derivative of which a main chain or a side chain is provided with an electrochemically crosslinkable active group to the technical field of carbon fiber surface treatment. And constructing a covalent bond combined three-dimensional network structure coating on the surface of the carbon fiber in situ. According to the method, firm anchoring of the coating and the carbon fibers is achieved, and the interface load transmission efficiency and the interlayer shear strength of the carbon fiber / polyether-ether-ketone composite material can be remarkably improved. The method is mild in process condition, easy in parameter control and convenient in post-treatment, meets green manufacturing requirements, and has remarkable large-scale production advantages.

The invention discloses a preparation method of an antibacterial warm-keeping fabric, and relates to the technical field of textiles. When the antibacterial warm-keeping fabric is prepared, firstly, (E)-butyl-2-ene-1, 4-diamine, glyoxal, formaldehyde and butyric acid are used as raw materials to synthesize a polyimidazolium salt antibacterial agent, then the polyimidazolium salt antibacterial agent is copolymerized with polytetrahydrofuran ether glycol and diphenylmethane diisocyanate to prepare an antibacterial polyurethane spinning solution, and the antibacterial fabric is obtained through wet spinning and weaving. The preparation method comprises the following steps: reacting L-cysteine with 3-amino propyl triethoxy silane to prepare cysteamine acyl propyl triethoxy silane, reacting with formaldehyde and phosphorous acid to obtain flame-retardant modified silane, and further preparing a silicon dioxide solution from the flame-retardant modified silane and sol-gel such as methyltrimethoxysilane; finally, the antibacterial fabric is treated with a benzophenone solution and then soaked with a silicon dioxide solution, and the antibacterial thermal fabric is prepared through ultraviolet irradiation, standing gelation, aging and hexane washing. The prepared fabric has excellent antibacterial property, heat retention property and flame retardant property.

The invention relates to a preparation method of a nano waterproof fabric. According to the method, ellagic acid is introduced in the self-polymerization process of dopamine for in-situ reduction, a polydopamine bonding layer and a silver nanoparticle anchoring layer are synchronously constructed on the surface of nano silicon dioxide, and then perfluorodecyltriethoxysilane is catalyzed by silver nanoparticles for a regioselective click chemical reaction, so that the nano silicon dioxide is obtained. The multifunctional bionic core-shell particles with catalytic activity and super-hydrophobicity are prepared. The particles are compounded with a fluorosilicone copolymer containing dynamic disulfide bonds, a fluorosilicone polymer containing boric acid ester groups and a tannic acid-metal complex to form a double-dynamic cross-linking finishing agent system. After a fabric is subjected to ultraviolet / ozone pretreatment, discontinuous polydopamine nanodot arrays are formed on the surfaces of fibers through short-time dopamine polymerization to serve as catalytic sites, then interface priority crosslinking is triggered by utilizing the sites, and finally, dynamic keys are driven to cooperatively exchange through ultraviolet light fixation and heat treatment, so that the intelligent dynamic waterproof membrane is formed.

The application discloses a kind of anti-rutting low-carbon asphalt mixture and preparation method thereof, belong to bitumen processing technical field, for solving the technical problem that the rutting resistance and high temperature resistance of asphalt mixture in prior art need to be further improved, specifically includes the following steps: matrix asphalt is placed in stirrer, heated to 150-160 DEG C, stir 5-10min, add dicumyl peroxide and maleic anhydride, heat preservation reaction 1-2h, post-treatment obtains activated asphalt;The application is mixed with activated asphalt, modified epoxy resin, amino modified regenerated fiber, curing agent, recycled stone, steel slag powder and modified rubber powder, to obtain low-carbon asphalt mixture, not only improve the rutting resistance and high temperature resistance of asphalt mixture, but also improve its mechanical properties.

To provide a bleaching method capable of bleaching a colored fiber product even without high temperature treatment or using a chemical agent, and also to provide a bleaching device used for the bleaching method.SOLUTION: A bleaching method involves a step to irradiate a colored fiber with light including a wavelength of 360 to 600 nm in the presence of oxygen.SELECTED DRAWING: Figure 5

The application discloses a preparation method of a partially fluorinated solid electrolyte and a lithium ion battery, and belongs to the field of electrode materials. The application proposes a partial fluorination strategy, and finds that by changing the ratio of monofunctional polymerizable acrylate monomers and bifunctional polymerizable acrylate monomers in a polymerization precursor liquid and the ratio of polymerizable fluorinated acrylate monomers in a polymerizable acrylate monomer composition, the mechanical properties and ionic conductivity of the finally obtained solid electrolyte can be controlled. The partially fluorinated solid electrolyte prepared by the preparation method provided by the application is stable and reliable, has higher safety, and has excellent mechanical properties and higher ionic conductivity. The partially fluorinated solid electrolyte provided by the application can be used for preparing a lithium ion battery with better safety performance and more excellent electrochemical performance.

The invention relates to a carbon fiber surface treatment method, which improves the interfacial compatibility of carbon fibers and a matrix material, improves the interfacial shear strength by 70-90%, and is simple and convenient to operate, easy to control and suitable for large-scale industrial production.

The invention discloses a preparation method of a high-resilience expanded polytetrafluoroethylene sealing material, and belongs to the technical field of high polymer material modification. According to the method, high-molecular-weight or modified polytetrafluoroethylene is used as a matrix, and high-orientation fibers are obtained through ultrasonic premixing, twin-screw melt extrusion, stretching and heat setting; dipping the fiber in a dispersion liquid containing high-entropy alloy nanoparticles, carbon nanotubes and graphene nanosheets, carrying out vacuum drying and gradient heat treatment to form a nano-reinforced precursor fiber, and constructing a porous anisotropic skeleton by adopting conventional or supercritical expansion and a specific weaving process; and interface strengthening and surface functionalization are realized through plasma surface treatment, silane coupling agent chemical grafting and wear-resistant coating coating. The obtained sealing material has low density, high strength, high resilience and low compression set, has excellent chemical medium resistance and anti-static performance, and is suitable for sealing parts of flanges, valves and the like under harsh working conditions of petrochemical engineering, electric power, hydrogen energy, aerospace and the like.

The invention relates to the technical field of PI fiber function modification, and discloses a modified PI fiber, a preparation method and a polyimide film based on the modified PI fiber, and specifically, the surface of the modified PI fiber is grafted with a carbon nanotube / carbon black hybrid conductive network through covalent bonds; the network is constructed by bridging a multifunctional connecting agent containing alkenyl, hydroxyl and a quaternary ammonium salt functional group, the hydroxyl of the connecting agent and an acylating chlorination carbon nanotube form an ester bond, the quaternary ammonium salt group electrostatically adsorbs carbon black, and the residual alkenyl and sulfhydrylated PI fiber are subjected to a sulfhydryl-alkene click reaction under the initiation of ultraviolet light to realize covalent grafting. The modified fiber is used as a functional filler, water-soluble polyamide acid is used as a film-forming matrix, and the flexible composite film is prepared through vacuum filtration and thermal imidization. The electromagnetic shielding effectiveness of the thin film in the X wave band reaches 37dB or above, and the tensile strength is gt; the elongation at break is gt; the cable has the advantages of high shielding performance, excellent mechanical strength and excellent flexibility.

Surface-modified fibers including fibers, and a surface-modifying layer covering at least a part of a surface of the fibers. The surface-modifying layer contains a compound having a hydrogen bonding functional group, and an amount of the surface-modifying layer is 0.01 to 2.5 parts by mass with respect to 100 parts by mass of the fibers used as a raw material.

The application discloses a kind of carbon nanotube fiber drawing enhancement method and system.The drawing enhancement method includes: providing carbon nanotube fiber, carbon nanotube fiber is twisted state;Carbon nanotube fiber is cabled and is treated, and fiber bundle is obtained;Protonation drawing and coagulation bath treatment are carried out to fiber bundle, and precursor fiber is obtained;Protonation reagent and / or coagulation bath reagent in precursor fiber are removed, and carbon nanotube reinforced fiber is obtained.The drawing enhancement method provided by the application is twisted and is cabled and is treated, after the internal each expansion fiber edge shape of fiber bundle is expanded by strong acid protonation, adaptive effect is generated;During drawing process, make stress more evenly be applied on each fiber, improve the stability in the process of fiber drawing, to realize higher drawing rate and drawing rate, finally significantly improve the mechanical strength and consistency of reinforced fiber, and bring very excellent continuity, very beneficial to the application of carbon nanotube fiber.

To provide a reinforcement material that has a sufficient amount of functional groups on the surface and exhibits excellent surface adhesion so as to be able to composite with a resin. In order to solve the above issue, the present disclosure provides a reinforcement material that is a continuous fiber and has a total acidic functional group concentration on the surface of the reinforcement material of 0.4 mmol / g or more and 4.0 mmol / g or less.

This application provides a negative electrode and a method for manufacturing the same, as well as a battery cell, battery and power consumption device including the same, wherein the negative electrode comprises a negative electrode current collector and a coating provided on at least one surface of the negative electrode current collector, the coating comprises a flexible carbon material, the flexible carbon material comprises ultrafine pores with a pore diameter of 0.8 nm or less, and the pore volume of the ultrafine pores with a pore diameter of 0.8 nm or less is V mic It is stated that the pore volume of the flexible carbon material is V total The unit is cm. 3 / g is V mic :V total The ratio is ≥65:100.

The invention relates to the technical field of building structures, in particular to a 3D printing FRP profile self-compacting fiber concrete beam structure. The concrete beam structure comprises a prefabricated FRP sectional material, and the prefabricated FRP sectional material is of an integrally-formed structure. The prefabricated FRP profile is composed of a top plate, a bottom plate, a rib plate and FRP reinforcing ribs located on the two side faces of the rib plate. The FRP reinforcing ribs are linearly arranged in the length direction of the rib plate; the bottom plate and the top plate are connected through a rib plate located in the middle of the bottom plate and the top plate, self-compacting fiber concrete is poured in mounting grooves in the top of the top plate and the top of the bottom plate, and an FRP reinforcing net layer formed by vertically and horizontally interweaving FRP ribs is horizontally embedded in the self-compacting fiber concrete. The concrete beam structure provided by the invention not only has better mechanical properties, but also has the advantages of light weight, high strength, corrosion resistance and the like; in addition, the concrete has the advantages of being good in stability, excellent in durability, high in loading capacity and the like, and the quality of the concrete is effectively guaranteed.

The present invention discloses an antibacterial electric toothbrush and antibacterial method based on the principle of pulsed ultrasonic piezoelectric response. The electric toothbrush of the present invention includes a toothbrush head and a driving mechanism for driving the vibration of the toothbrush head, the driving mechanism being configured to generate low-intensity pulsed ultrasonic waves. The toothbrush head is equipped with a piezoelectric brush, and the ultrasonic vibrations enhance the electrical response of the piezoelectric brush, thereby achieving excellent antibacterial effects. The electric toothbrush of the present invention not only effectively inhibits bacteria in the toothbrush head when it is placed stationary, but also has improved antibacterial activity during tooth brushing, effectively inhibiting plaque and preventing oral diseases such as periodontal disease.

The resin composition for melt spinning of the present invention is a filament having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 and a tensile strength of 10 MPa or more. The filament can be produced by forming a molten liquid of a resin composition having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 into a filament shape to provide a formed material, and conveying and concurrently cooling the formed material. The present invention also provides a resin composition for melt spinning being a filament, and a method for producing fiber using a melt spinning apparatus.

Examples of the disclosure include a current collector for a rechargeable lithium battery, an electrode including the current collector, and a rechargeable lithium battery including the current collector. The current collector for a rechargeable lithium battery includes a first electrically conductive layer, a second electrically conductive layer, and a fiber-reinforcing layer located between the first electrically conductive layer and the second electrically conductive layer, the fiber-reinforcing layer including a reinforcing fiber and a polymer.

The application relates to the technical field of chemical fiber post-treatment, and particularly discloses a high-elasticity composite fiber heat treatment process, which comprises the following steps: S1. fiber pretreatment: polyester-polyamide composite raw materials are immersed in a surfactant cleaning solution with a concentration of 1-2 wt%; S2. steam pre-swelling: the pretreated raw materials are placed in a 105-110 DEG C saturated steam environment for 1.5-2.5 minutes; S3. gradient heat setting: the raw materials pass through three temperature-controlled hot air zones in sequence; S4. negative pressure rapid cooling: the heat-set fibers are cooled to a fiber temperature <50 DEG C; and S5. post-treatment setting: the fibers are wound into a cylinder. The fibers can be used in the high-end textile field, have the characteristics of low oil agent residue rate and high breaking strength, and solve the problem that cleanliness and mechanical properties are difficult to coordinate in the traditional process; the product size stability and processing efficiency are improved through the wind speed gradient ratio and humidity control.