1989results about "Filament/thread forming" patented technology

The invention discloses a melt spinning cooling system which comprises a spinning box, a cooling cylinder section, a first heating assembly, a second heating unit and a recovery part, the first heating assembly outputs trace hot nitrogen, anti-oxidation protection of melt trickles is achieved, the oxidation risk possibly caused by direct contact of a traditional cooling medium is avoided, and the cooling efficiency is improved. Meanwhile, the second heating unit is matched to regulate and control the temperature of the cooling cylinder section, so that the whole-process temperature accurate control from oxidation prevention to high-temperature natural cooling and the high-temperature natural cooling and cold air supply-free operation process are realized, and the solidification orientation length and process of the melt trickle can be actively lengthened by combining gradient process temperature control; different from the defect of insufficient orientation caused by too fast cooling in the prior art, key conditions are provided for optimization of a fiber orientation structure; due to the coaxially stacked cooling cylinder sections and nitrogen recovery operation, a stable cooling environment is constructed, fiber shaking is avoided, the nitrogen utilization rate and the environmental safety are improved, and the process stability and economical efficiency are balanced.

The invention discloses a three-fluid three-dimensional flow guide spinning head, electrostatic spinning equipment and a batch preparation method of three-chamber embedded parallel structure nanofibers, three different fluids are synchronously guided into a high-voltage electrostatic field by simultaneously arranging a plurality of nozzle outlets with combined structures, and a plurality of complex combined nozzle outlets are used as macroscopic templates, so that the three-chamber embedded parallel structure nanofibers are prepared under the high-voltage electrostatic field. Through interaction of a high-voltage electrostatic field and fluids, batch preparation of the three-chamber embedded and column-structured nanofibers by multi-fluid common electrospinning is realized. The three spinning solutions are guided to a common outlet through the first series of metal capillary tubes, the second series of metal capillary tubes and the spinning solution insulating container respectively; the first series of metal capillary tubes and the second series of metal capillary tubes are respectively dispersed from respective capillary tube gathering inlets, penetrate through the interior of the spinning solution insulating container to the bottom of the spinning solution insulating container and vertically penetrate out to form a plurality of outlets which are parallel in pairs; a through hole outlet is formed in any parallel outlet at the bottom of the spinning solution insulating container to form a common outlet of the three spinning solutions, and the three-chamber embedded and arrayed nano structure is directly prepared in batches in a single step.

The invention discloses a conductive yarn and a preparation method thereof, relates to the technical field of functional textile materials and composite conductive fiber preparation, and can solve the problems that an existing conductive yarn is poor in flexibility, insufficient in durability, prone to oxidation failure and difficult to integrate multiple functional performances. The preparation method comprises the following steps that S1, PBO yarn is soaked in a dopamine solution, a PDA modification layer is formed on the surface of the PBO yarn through a polydopamine self-polymerization reaction, and the PDA modification layer provides a chelation site and a bonding interface for metal deposition; s2, the PDA modified PBO yarn obtained in the step S1 is subjected to chemical silver plating, silver is deposited on a PDA modified layer to form a continuous conductive layer, and conductive PBO core yarn is prepared; s3, carrying out melt blending and granulation on the low-dielectric-constant flame-retardant filler and thermoplastic polymer resin to prepare flame-retardant composite particles; and S4, spinning by taking the conductive PBO core yarn prepared in the step S2 as a core layer and a melt formed by melting the flame-retardant composite particles prepared in the step S3 as a skin layer to prepare the conductive yarn.

The invention belongs to the technical field of textile, and relates to an efficient antibacterial fabric for preparing underwear and a dyeing and finishing method and application thereof.The provided antibacterial fabric is weft-knitted bird eye double-faced knitted fabric and is composed of polyester, cotton and modal fibers, the surface density is 180 g / m, surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections, and the surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections. The lining yarn is formed by weaving dacron and blended yarn according to the proportion of 2: 1. According to the method, dyeing and finishing of the antibacterial fabric, fabric weaving and ergonomic sewing are combined, the fabric which has efficient antibacterial performance, good moisture permeability and ultraviolet-proof performance and high color fastness is obtained, and the prepared antibacterial clothes are high in quick-drying performance, comfortable to wear and high in environmental adaptability.

The purpose of the present invention is to provide: a low-shrinkage fiber; a method for producing the low-shrinkage fiber; an air-blended yarn comprising the polytrimethylene terephthalate fiber; and a fabric comprising the air-blended yarn. The low-shrinkage fiber is substantially composed of polytrimethylene terephthalate, and can be used to produce a precursor for a fabric, which has a soft texture and a low shrinkage rate due to heat. The present invention is characterized in that 90 mol% or more of polytrimethylene terephthalate fibers are composed of trimethylene terephthalate repeating units, the boiling water shrinkage of the polytrimethylene terephthalate fibers is 5% or less, and the elastic modulus of the polytrimethylene terephthalate fibers at an elongation of 20% is 5 cN / dtex or less.

The invention discloses an injectable material for promoting bone regeneration through piezoelectric and conductive integrated nanofiber hydrogel with ultrasonic response and a preparation method of the injectable material. The injectable material is composed of piezoelectric and conductive nanofibers and hydrogel. Wherein the piezoelectric conductive nanofiber is prepared from an inorganic piezoelectric material and a piezoelectric polymer through electrostatic spinning, or is prepared from an inorganic / organic composite piezoelectric material and a biological material with conductive performance through electrostatic spinning.

The invention discloses an electrostatic ionization device and an array spinning ionization box, and relates to the field of textile processing machinery, the electrostatic ionization device comprises an ionization assembly, the ionization assembly is provided with a backflow groove with a top opening, and a metal wire which is horizontally arranged and can be externally connected with a power supply is arranged above the backflow groove; the reciprocating assembly comprises a liquid supply brush making contact with the upper surface of the metal wire and can drive the liquid supply brush to reciprocate along the axis of the metal wire and coat the surface of the metal wire with a polymer solution used for electrostatic ionization. The liquid supply assembly can store a polymer solution and convey the stored polymer solution to the liquid supply brush, and the backflow groove is communicated with the liquid supply assembly and can collect the polymer solution dripping in the process that the surface of a metal wire is brushed by the liquid supply brush and flow back into the liquid supply assembly. According to the electrostatic ionization device and the array spinning ionization box, the solution utilization rate can be increased, rapid replacement of multiple solution varieties can be achieved, raw material waste is reduced, and the production cost is reduced.

The invention relates to the technical field of sewage treatment, in particular to an electrostatic spinning PVDF nanofiber membrane for sewage treatment and a preparation method and application of the electrostatic spinning PVDF nanofiber membrane. The preparation method comprises the following steps: dissolving PVDF (Polyvinylidene Fluoride) particles in a mixed solvent of DMF (Dimethyl Formamide) and acetone, adding nano TiO2 particles subjected to APTES (Aminopropyltriethoxysilane) surface modification, and adding PVP (Polyvinyl Pyrrolidone) into the solution to obtain a uniform spinning solution; spinning by adopting electrostatic spinning equipment to obtain a PVDF / TiO2 / PVP nanofiber membrane; the nanofiber membrane is soaked in a sodium hydroxide solution, then the membrane is soaked in a Tris-HCl buffer solution containing dopamine, and the final electrostatic spinning PVDF nanofiber membrane is obtained. The average diameter of nanofibers of the nanofiber membrane is 200-300nm, the porosity of the membrane is 70-80%, and the water contact angle is less than 60 degrees; when the nanofiber membrane is used for treating sewage containing organic pollutants and heavy metal ions, the removal rate of the nanofiber membrane on methyl orange can reach 95% or above; the rejection rate of copper ions can reach 90% or above; the removal efficiency of organic pollutants and heavy metal ions is obviously improved.

The invention discloses an MXene / rGO (at) SA coaxial composite fiber based on a core-shell structure and a preparation method and application thereof, and belongs to the technical field of nano composite materials and flexible electronics. The invention solves the problems of many interface defects, unstable performance and the like of the existing coaxial fiber. The MXene / rGO-SA coaxial composite fiber is prepared by adopting a coaxial wet spinning method, a high-performance SA fiber with excellent mechanical properties is used as a tough shell layer, a multi-element nano material MXene / rGO composite fiber is used as a core layer, a calcium chloride-ethanol mixed solution in a certain proportion is used as a coagulating bath, and the coaxial composite fiber is prepared by utilizing a coaxial needle head; the interface bonding force and the conductive network of the MXene / rGO (at) SA coaxial composite fiber are optimized by accurately controlling the core-shell ratio, and the mechanical strength, the conductivity and the stability are synergistically improved.

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

The invention discloses a method for preparing micro-nano fibers through needle-free electrostatic spinning equipment assisted by an ion blower gun, and belongs to the technical field of spinning. The method specifically comprises the following steps: S1, dissolving a high-molecular polymer in a proper solvent to prepare a spinning precursor solution; and S2, preparing the micro-nano fiber from the spinning solution on a suitable collection surface by using an ion blower gun assisted needleless electrostatic spinning device. Through the synergistic effect of directional airflow generated by the ion blower gun and a controllable electric field, fiber surface charges are effectively neutralized, the jet instability is inhibited, and the controllability of a fiber flight path is improved. Meanwhile, the ionic wind assists in enhancing interface attachment between the fiber and the collector, uniform deposition is promoted, and the compactness and adhesive force of the fiber membrane are remarkably improved. According to the method, chemical modification does not need to be carried out on a material system, the intrinsic performance of the fiber is kept, universality and expandability are achieved, and a new path is provided for continuous preparation of the high-performance micro-nano fiber.

The invention provides a skin-core structure moisture power generation yarn, the yarn at least comprises a metal core layer, a wrap yarn layer and a conductive coating, the wrap yarn layer comprises lithium chloride doped polyvinyl alcohol fibers and tightly wraps the periphery of the metal core layer through conjugate electrostatic spinning, and the conductive coating is nano conductive silver paint. And the conductive coating is not in direct contact with the metal core layer. The preparation method comprises the following steps: firstly, adding lithium chloride powder into deionized water, stirring at normal temperature until complete dissolution, then adding polyvinyl alcohol powder, heating and stirring until complete dissolution, standing and defoaming to prepare a wrap yarn layer spinning solution; performing conjugate electrostatic spinning on the prepared skin layer spinning solution to form nanofiber wrap yarn on the outer layer of the metal core; nano conductive silver paint is sprayed on the surface of the wrap yarn layer, and the wrap yarn layer is dried in the air. The yarn has good flexibility, and has excellent surface waterproof and moisture permeable performance, stability and reusability while forming stable output current and voltage.

The invention discloses a flexible lanthanum zirconate-alumina fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of inorganic nonmetal ceramic fiber materials. The preparation method comprises the following steps: dissolving zirconium oxychloride octahydrate, lanthanum chloride heptahydrate and aluminum chloride hexahydrate into absolute methanol, sequentially adding acetylacetone and triethylamine, stirring, and drying under reduced pressure to obtain a zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride; soaking the zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride in acetone, standing, filtering, concentrating under reduced pressure, and drying to obtain a zirconium-lanthanum-aluminum acetylacetone polymer precursor; the preparation method comprises the following steps: preparing a spinning solution from a zirconium-lanthanum-aluminum acetylacetone polymer precursor, absolute methanol serving as a solvent and polyoxyethylene serving as a spinning aid, and carrying out electrostatic spinning on the spinning solution to obtain a lanthanum zirconate-aluminum oxide precursor fiber membrane; and performing heat treatment on the lanthanum zirconate-aluminum oxide precursor fiber membrane to obtain the flexible lanthanum zirconate-aluminum oxide fiber membrane. According to the preparation method, acetylacetone is added into zirconium oxychloride, lanthanum chloride and aluminum chloride for coordination to form a linear zirconium-lanthanum-aluminum acetylacetone polymer, so that the technical problem that lanthanum zirconate long fibers with high strength and good flexibility are difficult to obtain is solved.

Provided is a liquid crystalline polyester fiber capable of achieving improved weatherability without kneading a UV absorber into the fiber or attaching a weatherable UV absorber after fiber spinning. The liquid crystalline polyester is a fiber that consists essentially only of a liquid crystalline polyester, in which the amount of UV absorber used is 5 mass % or less, and the strength retention in the weather fastness test with xenon arc lamp light in accordance with JIS L 0891 is 60% or more.

The invention belongs to the technical field of textile materials, and discloses an easy-to-dye composite polyester fiber and a preparation method thereof. The preparation method comprises the following steps: by taking polyethylene glycol terephthalate as a core layer and low-melting-point polyester as a skin layer, carrying out melt spinning to prepare skin-core composite fibers; after heating and melting a skin layer, bombarding by using a titanium dioxide nano particle flow to obtain roughened fibers; after plasma treatment, dipping with an activating solution of triethylamine and 4-methylbenzenesulfonyl chloride to obtain activated fibers; carrying out ultrasonic reaction on the activated fiber and a modifier under the catalysis of tetrabutyl titanate, and washing and drying to obtain the easy-to-dye composite polyester fiber. The prepared composite polyester fiber not only has the advantage of being easy to dye, but also has excellent antibacterial performance and flame retardant performance, and the quality of the composite polyester fiber is effectively guaranteed.

The invention discloses a high-voltage output elastic self-crimping spiral fiber and a preparation method and application thereof, and belongs to the technical field of fiber preparation. The preparation method comprises the following steps: dissolving a thermoplastic piezoelectric polymer in a first solvent dissolved with metal salt to prepare a first spinning solution; a high-elasticity polymer is dissolved in a second solvent to prepare a second spinning solution, the second solvent is different from the first solvent, and the high-elasticity polymer is incompatible with the thermoplastic piezoelectric polymer; taking the first spinning solution as a shell layer solution and the second spinning solution as a core layer solution, and carrying out electrostatic spinning by adopting a two-component core-shell electrostatic spinning process. The preparation method is simple, and the prepared fiber has excellent mechanical property and enhanced piezoelectric effect and can be applied to flexible electronic devices and intelligent wearable equipment.

The invention provides an electrostatic spinning solution which is prepared from the following raw materials: LLZTO modified by a silane coupling agent MEMO, PVDF-HFP and a solvent, the mass ratio of the silane coupling agent MEMO modified LLZTO to the PVDF-HFP is (15 to 20): 100. The invention also provides a preparation method of the solid-state electrolyte membrane, the PVDF-HFP matrix and the LLZTO filler in the prepared composite solid-state electrolyte membrane are uniformly dispersed by optimizing a formula of an electrostatic spinning solution, improving a lithium salt introduction mode and adopting a step-by-step drying process and a double-layer glass sheet capping process, so that a continuous and efficient ion transmission channel is formed; meanwhile, the lithium salt is uniformly distributed in the electrolyte membrane, so that the ionic conductivity is remarkably improved, the electrolyte membrane has relatively high compactness and stability and is in good interface contact with an electrode material, the charge-discharge performance of the battery is effectively improved, the cycle life of the battery is effectively prolonged, and powerful support is provided for development of a high-performance solid-state battery.

The invention discloses automatic spinning cooling equipment, relates to the technical field of textile processing, and aims to solve the technical problems that existing spinning cooling equipment depends on manual carrying of a cooling device, the temperature control precision is poor, the cooling effect is unstable, and the operation efficiency is low. Automatic movement of the cooling device is achieved through lead screw transmission, manual carrying is replaced, the labor cost is reduced, and the operation efficiency is improved; precise temperature control is achieved by means of a temperature sensor and a cooling mechanism, and the multi-process requirements of melt spinning, solution spinning and the like are met; the spinning cooling uniformity is guaranteed through the design of the double flow guide pipes and the opposite side air blowing mechanism; the arc-shaped bent pipe solves the problem of spinning transition deformation, multi-device collaboration is improved, finally, the quality of spinning products is effectively improved, and the device is suitable for the chemical fiber spinning cooling process.

The application discloses a kind of electrospinning preparation methods of superfine, no adhesion polyether ketone ketone nanofiber membrane: polyether ketone ketone is dissolved in solvent to obtain polyether ketone ketone spinning solution;Polyether ketone ketone spinning solution is loaded in the injector of electrospinning device, and spinning is carried out;The concentration of ethanol or water in spinning environment is improved using solvent atomization between injector needle and collecting device, and polyether ketone ketone jet phase separation is accelerated;The nascent polyether ketone ketone nanofiber is collected into membrane;The fiber membrane collected is soaked in coagulation liquid to make solvent remaining in fiber precipitate, after taking out, dry, obtain polyether ketone ketone nanofiber membrane.The application realizes low concentration electrospinning using the unique interchain topological entanglement of polyether ketone ketone, and promotes phase separation by introducing solvent atomization between spinneret and collecting device, overcome the problem that other polymers are difficult to obtain continuous fiber and fiber is easy to adhere in low concentration electrospinning, and prepare superfine, no adhesion polyether ketone ketone nanofiber membrane.

The invention belongs to the technical field of polyester aerogel fibers, and discloses a skin-core type polyester aerogel fiber and a preparation method thereof.The monofilament of the skin-core type polyester aerogel fiber is of a skin-core structure, base materials of a skin layer and a core layer are polyester, silicon-containing polyester aerogel particles of a core-shell structure are dispersed in the core layer, and the silicon-containing polyester aerogel particles of a core-shell structure are dispersed in the core layer. The mass of the silicon-containing polyester aerogel particles with the core-shell structure in the core layer is 25-45% of the mass of polyester, and the preparation process of the silicon-containing polyester aerogel particles with the core-shell structure comprises the following steps: soaking hydrophilic silicon dioxide aerogel in an ethanol solution, mixing the modified hydrophilic silicon dioxide aerogel, a silane coupling agent, PTA, ethylene glycol, water and other substances, heating, and carrying out ultrasonic dispersion to obtain the silicon-containing polyester aerogel particles with the core-shell structure. Carrying out esterification reaction and condensation polymerization reaction; the preparation method comprises the following steps: respectively preparing a core layer raw material and a skin layer raw material, and performing skin-core composite spinning to obtain the skin-core type polyester aerogel fiber. The heat-insulating material has good heat-insulating property and mechanical property at the same time.

The invention relates to the technical field of drug-loaded microparticles, in particular to a preparation method and application of medical stone / PLGA composite drug-loaded microparticles, medical stone and PLGA are prepared into a structure with activated nano medical stone as a core and a PLGA polymer as a shell through the processes of ball milling, acid activation, emulsification, solvent volatilization and the like, and the medical stone and the PLGA are synergistically matched, so that the drug-loaded microparticles have the advantages that the drug-loaded microparticles are uniform in particle size distribution, and the drug-loaded microparticles have good drug-loaded performance. Firstly, the hydrogel has intelligent responsiveness, can accelerate degradation in alkaline and enzyme environments of wound surfaces, and realizes accurate release of drugs as required; secondly, the long-acting controlled release property is shown, and a dual sustained release barrier is constructed through medical stone adsorption and PLGA wrapping, so that the medicine is released for more than 72 hours at a constant speed following zero-order dynamics, and burst release is effectively avoided. And thirdly, when the drug-loaded particles are used for hydrogel, the drug-loaded particles in nanoscale are combined with the hydration effect of a hydrogel matrix, so that the efficient permeability of the drug in the cuticle is greatly improved.

The present invention relates to an electrostatic spray device comprising: a water tank unit having one open side and accommodating a liquid base solution; an electrode unit, which applies power to the base solution so as to generate a potential difference for droplet formation of the base solution; and a nozzle unit which is provided inside the water tank unit and which discharges the base solution in the droplet form by means of the potential difference, wherein the nozzle unit has a lower portion immersed in the base solution, and thus can autonomously absorb the base solution. Therefore, the present invention can spray micro-droplets by means of electrostatic spraying.

The invention relates to the technical field of chemical fibers, in particular to a low-melting-point polyester FDY (fully drawn yarn) preparation process which comprises the following steps: preparing raw materials, selecting polyester chips and a low-molecular-weight polyester copolymer, mixing the polyester chips and the low-molecular-weight polyester copolymer according to a ratio, melting and blending the polyester chips and the low-molecular-weight polyester copolymer with the additive amount of 5-8wt% and the intrinsic viscosity of 0.65-0.70 dL / g, and performing extrusion molding to obtain the low-melting-point polyester FDY. And putting the mixed raw materials into a screw extruder, and carrying out melt blending and spinning treatment at 250-260 DEG C. According to the low-melting-point polyester FDY and the preparation method thereof disclosed by the invention, a component regulation end is arranged, so that a synergistic effect mechanism of a polyester matrix and a low-melting-point copolymer is accurately matched in a preparation process of the low-melting-point polyester FDY, and the uniformity of melt components is ensured; meanwhile, the copolymerization structure design directivity acts on molecular chain regularity regulation and control, thermal stability fluctuation in the spinning process is inhibited in real time, it is guaranteed that the continuous forming capacity of fibers is maintained under the high-speed spinning condition, and the stability of a production line is improved.

The invention relates to the technical field of high polymer materials, in particular to a color-spun superfine sea-island imitation sheepskin fabric and a production method thereof. The color-spun superfine sea-island imitation sheepskin fabric comprises the following raw materials in parts by weight: color-spun superfine sea-island fibers, conventional polyester filaments and a functional additive, the color spinning superfine sea-island fiber is formed by blending alkali-resistant color master batches and a sea-island base material, the mass ratio of an island component to a sea component in the sea-island base material is (5-7): (3-5), and raw materials of the island component and the sea component are polyethylene terephthalate and polyethylene respectively; the functional additive comprises an alkali-resistant stabilizer, a dyeing auxiliary agent and a softening agent. According to the invention, sodium citrate and KH-550 in the alkali-resistant stabilizer react at a constant temperature, sodium citrate is dissolved in the process and forms weak interaction with amino of KH-550 to enhance the stability of the system, and ether bonds of polyoxyethylene fatty acid and sulfonic groups of lauryl sodium sulfate in the dyeing auxiliary agent form a synergistic effect to enhance the emulsifying and wrapping capacity to grease and color paste.

The invention discloses a low-temperature high-conductivity composite solid-state electrolyte membrane and a preparation method and application thereof, and relates to the technical field of solid-state lithium battery materials, the low-temperature high-conductivity composite solid-state electrolyte membrane comprises: a polymer matrix composed of poly (1, 3-dioxolame) and a polyvinylidene fluoride-hexafluoropropylene copolymer; the ion conduction network is composed of a metal organic framework filler with the surface modified with-SO3Li groups and sulfonic acid lithiated carbon nanotubes arranged in the axial direction of the polymer matrix; a first anti-freezing interface layer and a second anti-freezing interface layer are arranged on the surfaces of the two opposite sides of the polymer matrix, and the first anti-freezing interface layer and the second anti-freezing interface layer are butanedinitrile-glutaronitrile eutectic plastic crystal layers composed of butanedinitrile, glutaronitrile, lithium salt and a nano reinforcing agent respectively. The solid electrolyte is suitable for polar scientific investigation equipment, spacecrafts and other low-temperature environments, and solves the industrial problems of sharp increase of low-temperature grain boundary impedance and interface contact failure of the traditional solid electrolyte.

The invention discloses an antistatic and antibacterial mixed fiber and a preparation method thereof, and belongs to the technical field of textile fabrics. The preparation method comprises the steps of fiber pretreatment, polycaprolactam graft modification, polyethylene glycol terephthalate graft modification, blending treatment and after-treatment. According to the invention, the PA6 (polycaprolactam) fiber is grafted and modified step by step to load quaternary ammonium salt, so that the long-acting antibacterial effect is realized; pET (polyethylene glycol terephthalate) fiber is grafted with a cationic monomer to construct an antistatic path, and the PET fiber and the cationic monomer are blended in a ratio of (6-7): (3-4), so that the performance and the mechanical strength are considered; a polythiophene conducting layer and silver-doped nano titanium sol are adopted in after-treatment, so that the surface is endowed with double antibacterial and efficient antistatic functions. According to the process, the environmental protection property and the production efficiency are remarkably improved through a water-phase reaction system and a padding-baking method, and the function retention rate is larger than or equal to 90% after 50 times of washing.

A false-twist textured yarn is provided exhibiting a high sensitiveness feel of worsted-wool having natural appearance with glare suppressed, and a composite false-twist textured yarn, a twist yarn, a woven or knitted fabric, and clothing including the false-twist textured yarn, the false-twist textured yarn including a polyester-based thermoplastic resin A and a polyester-based thermoplastic resin B and satisfying the following requirements: (1) a difference (MA−MB) between a weight-average molecular weight MA of the resin A and a weight-average molecular weight MB of the resin B is 2000 to 15000; (2) resins A and B are eccentrically joined; (3) an apparent thick-to-thin ratio (Dthick / Dthin) of the false twist textured yarn is 1.05 to 3.00; and (4) the false-twist textured yarn has a slit in a fiber axis direction and a crack in a direction substantially orthogonal to the fiber axis direction on a surface of the false-twist textured yarn.

The application relates to the technical field of biomedical materials, in particular to a wound paste for preventing skin scar formation and a preparation method thereof. The wound paste for preventing skin scar formation comprises an integrated composite film comprising an adhesion layer and a functional layer; the adhesion layer comprises first silk fibroin and metal ions; the metal ions have at least one of the effects of antibiosis, anti-inflammation and pro-angiogenesis; the functional layer comprises composite fibers with a core-shell structure; the core of the composite fiber comprises second silk fibroin and an angiogenesis inhibitor, and the shell comprises third silk fibroin. The wound paste is good in biocompatibility, convenient to apply, gradually releases effective components, adapts to the healing process of a wound, and is more scientific and effective in preventing scar formation.

The invention provides a directional moisture absorption and sweat releasing functional fabric and a preparation method thereof.The fabric comprises a sweat releasing and drying layer, a capillary moisture guiding layer and a hydrophilic moisture absorption layer from outside to inside, the hydrophilic moisture absorption layer is a cellulose acetate electrostatic spinning super-hydrophilic modified layer, the capillary moisture guiding layer is formed by weaving porous polyester yarn, and the hydrophilic moisture absorption layer is a super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified fiber. The perspiration drying layer is a silane super-hydrophobic modified layer. Porous cross-section polyester fibers are prepared by adopting a washable template method, the moisture conductivity is improved, an electrostatic spinning cellulose acetate nanofiber membrane is subjected to super-hydrophilic modification, the sweat absorption rate is increased, the skin-friendly performance is improved, a sweat-releasing and drying layer is subjected to silane hydrolysis spraying and then heat treatment to form a super-hydrophobic siloxane coating, the surface dryness is enhanced, and the moisture absorption rate is increased. Unidirectional migration and rapid evaporation of sweat from inside to outside are achieved.

The application discloses aerogel fibers, a preparation method and application thereof, and belongs to the technical field of fiber preparation. The aerogel fibers with a skin-core structure are prepared by successfully combining high-silica fiber bundles and cross-linked polyimide aerogels through injection and PMMA tube forming. The polyimide is modified, so that the polyimide has good bonding force with the high-silica fiber bundles and good hydrophobicity. The aerogel fibers prepared by the application have superior mechanical properties, heat insulation properties and hydrophobic properties. Fabrics prepared by using the aerogel fibers can achieve excellent heat insulation and waterproof properties in extremely hot and humid environments. The technology has wide application prospects in application fields requiring high durability, excellent heat insulation and waterproof properties.