1194results about "Wet spinning methods" patented technology

The invention belongs to the technical field of fiber materials, and relates to a micro-gear-shaped special-shaped stretchable conductive anti-radiation fiber and preparation and application thereof, a core layer spinning solution and a shell layer spinning solution are subjected to coaxial wet spinning to prepare the micro-gear-shaped special-shaped stretchable conductive anti-radiation fiber; the core layer spinning solution is obtained by dissolving TPU in anti-radiation particles I / anti-radiation particles II / organic solvent dispersion, and the shell layer spinning solution is obtained by dissolving TPU in MXene / organic solvent dispersion; the mass volume ratio of the TPU to the organic solvent in the core layer spinning solution is (2.2-3g): 10ml, and the mass volume ratio of the TPU to the organic solvent in the shell layer spinning solution is (0.5-1g): 10ml; the anti-radiation fiber is of a core-shell structure, the cross section of a core layer is circular, the cross section of a shell layer is of a micro-gear-shaped special-shaped structure, and the average height of gear protrusions is 20-50 m; when being applied, the fabric is processed into a stretchable multifunctional fabric by adopting a weaving process. According to the method, a coaxial wet spinning process is adopted to prepare the product in one step; the product has high sensitivity and a wide sensing range; the application range is wide.

The invention discloses a mixed gas-imitating gel fiber as well as a preparation method and application thereof, and belongs to the technical field of fiber materials. The mixed gas-imitating gel fiber is prepared from the following components: cellulose dispersion liquid, a silane coupling agent and viscose in a mass ratio of (1-3): (0.2-0.8): (5-10), comprising the following steps: adding sodium hydroxide into a cellulose dispersion liquid, adjusting the pH value to be alkaline, adding viscose and a silane coupling agent, and carrying out ultrasonic stirring to prepare a mixed spinning solution; the mixed spinning solution is extruded into a coagulating bath through a wet spinning device to be drafted, wet fibers are obtained, and the mixed gas-imitating gel fibers are obtained after freeze drying. The aerogel fiber disclosed by the invention has low heat conductivity coefficient, high mechanical strength and extreme temperature resistance, can solve the problem that the densification and porosity of a traditional fiber structure are difficult to balance, and effectively expands the application prospect of the aerogel fiber in the fields of cold protection, warm keeping and the like.

The invention relates to the technical field of aromatic polyamide high polymers, in particular to a modified poly-p-phenylene terephthamide fiber with high elongation at break and a preparation method of the modified poly-p-phenylene terephthamide fiber. According to the invention, a small amount of 3, 4-difluorobenzene is introduced According to the preparation method, the third monomer containing 4, 4 '-diaminodiphenyl ether and the fourth monomer containing a diaminophenoxy functional group are added, and the molar ratio of the third monomer and the fourth monomer in the total amount of the diamine monomer is controlled, so that the rigid molecular chain structure of the conventional para-aramid fiber is destroyed to a certain extent, the breaking strength of the fiber is maintained, the elongation at break of the polymer fiber is enhanced, and the service life of the polymer fiber is prolonged. The prepared modified poly-p-phenylene terephthamide can still adopt a dry-jet wet spinning process, the cost of a new production line of a factory is saved, the fiber with stable elongation at break index is obtained by optimizing process conditions and parameters, and the elongation at break of the prepared fiber is 3.6% or above.

The invention belongs to the technical field of thermal management materials, and provides aerogel fibers of a three-dimensional porous structure and a preparation method and application of the aerogel fibers. The preparation method comprises the following steps: preparing a polyurethane spinning solution by taking N, N-dimethylformamide as a solvent; then carrying out wet spinning on the polyurethane spinning solution to obtain wet gel state fibers; and immersing the wet gel-state fiber into an organic solvent for solvent exchange, and drying after the solvent exchange is completed to obtain the aerogel fiber. The method is simple, low in cost and low in equipment requirement, efficient and continuous production of the aerogel fibers can be achieved, different spinning solutions can be adopted for preparing the aerogel fibers of different pore structures, meanwhile, the problem that the porous structures of the aerogel fibers are prone to collapsing when the aerogel fibers are dried at normal pressure is solved, and the aerogel fibers are suitable for large-scale production. The aerogel fiber with the three-dimensional porous structure is stable in porous structure, not prone to collapse, excellent in mechanical property and excellent in heat preservation and heat insulation performance.

The invention relates to the technical field of textile material and fiber processing, in particular to a high-elasticity moisture-absorption breathable acetate fabric and a preparation method thereof. The invention discloses a high-elasticity moisture-absorption breathable acetate fabric and a preparation method thereof.The acetate fabric takes a bio-based degradable thermoplastic polyester elastomer as an island and acetate as a sea, a homothermal double-hole structure is embedded in the acetate fabric, and the surface of the acetate fabric is covered with a polyglutamic acid and chitosan oligosaccharide self-repairing hydrophilic layer; the preparation method comprises the following steps: pre-burying alkali-resistant microspheres in a marine facies through solid island-solution sea double-path spinning of a bio-based degradable thermoplastic polyester elastomer and acetate, synchronously forming groove-closed pore double channels through simultaneous heating one-step alkali etching-baking, and finally forming a dynamic reversible hydrogen bond network through polyglutamic acid and chitosan oligosaccharide, so as to obtain the marine-based degradable alkali-resistant hydrogel. A bio-based finishing layer with a self-repairing function is obtained, and the finally obtained fabric has the characteristics of high elasticity, breathability, lasting moisture absorption, greenness and degradability.

The invention relates to the technical field of natural polymer material processing, and discloses a cross-linked composite chitosan solution which is composed of the following components in percentage by mass: 1%-5% of chitosan, 0.1%-5% of a cross-linking agent, 0.1%-5% of acetic acid and the balance of water, and the cross-linked composite chitosan solution is prepared from the following components in percentage by mass: 1%-5% of chitosan, 0.1%-5% of a cross-linking agent, 1%-5% of acetic acid and the balance of water. The cross-linking agent is one or more of glutaraldehyde, citric acid and epoxy chloropropane. According to the cross-linked composite chitosan solution and the preparation method of the chitosan fiber of the cross-linked composite chitosan solution, the adaptability of the cross-linked composite chitosan solution in a human body can be further improved and the immunoreaction can be reduced through a cross-linking reaction, so that the enhancement of the biocompatibility of the cross-linked composite chitosan solution can be ensured; by selecting different cross-linking agents and controlling the cross-linking degree, the biodegradation rate of the chitosan can be adjusted to a certain extent, so that the chitosan is more suitable for specific medical or environmental application requirements, and in addition, the water resistance of the chitosan can be remarkably improved through the cross-linking effect.

The invention discloses a preparation method of a flexible electromagnetic shielding type force sensor based on a coaxial structure, and belongs to the field of flexible electronics and intelligent sensors. According to the method, a coaxial wet spinning process is adopted, a core-sheath structure conductive fiber is constructed, a core layer is made of a multi-walled carbon nanotube (CNT) and thermoplastic polyurethane (TPU) composite material, and a sheath layer is made of a nickel-coated carbon nanotube (Ni-CNT) and TPU composite material. By regulating and controlling the proportion of the core sheath, the construction of the gradient conductive network is realized, and the sensing sensitivity, the electromagnetic shielding performance and the mechanical flexibility are improved. The obtained Ni-CNT-coated CNT fiber is made into fabric and integrated in a sensing glove, and multi-finger bending detection and wireless man-machine interaction control are achieved. The sensor has the advantages of high sensitivity, wide strain detection range and excellent electromagnetic shielding effectiveness, is suitable for the fields of intelligent wearing, anti-interference man-machine interface and fire-fighting equipment, and can also be expanded to complex application scenes such as aerospace teleoperation.

The invention relates to the technical field of preparation of viscose fibers, in particular to a preparation method of viscose fibers based on wormwood essential oil / paraffin double-layer microcapsules, which comprises the following preparation steps: S1, preparing the wormwood essential oil / paraffin double-layer microcapsules; s2, preparing a microcapsule spinning solution; s3, spinning and forming. According to the invention, the wormwood essential oil is coated in the double-layer microcapsule, so that the natural antibacterial property of the wormwood essential oil is fully exerted. Main active components (such as eucalyptol and flavonoid compounds) of the wormwood essential oil are continuously released through a microcapsule slow release mechanism, and growth of common pathogenic bacteria such as escherichia coli and staphylococcus aureus is remarkably inhibited. Meanwhile, due to the double-layer structure (the polyurethane inner shell and the polyurea outer shell) of the microcapsule, volatilization and oxidation of the wormwood essential oil in the spinning process are effectively avoided, and the long-acting antibacterial effect is ensured.

The invention discloses a chitosan polyphenol composite spinning method and application of the chitosan polyphenol composite spinning method in artificial hair, and belongs to the technical field of bio-based spinning. According to the chitosan / punicalagin (CS / PL) colored composite fiber and the preparation method thereof, punicalagin and chitosan are subjected to mixed spinning through a wet spinning method, the chitosan / punicalagin (CS / PL) colored composite fiber is prepared, the degradability, biocompatibility and antibacterial property of chitosan are reserved, the composite fiber can be endowed with natural brown yellow, and the mechanical performance of the fiber is improved. The chitosan / punicalagin composite fiber prepared by the invention has excellent anti-swelling performance, mechanical performance, flexibility and flame retardancy which are obviously superior to those of commercially available artificial hair.

The invention discloses a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which comprises the following steps: step 1, dissolving an aramid fiber polymer in concentrated sulfuric acid to form a spinning solution; step 2, adding a nano conductive material and a magnetic material into the spinning stock solution, and treating the mixed solution by adopting an ultrasonic-high-speed shearing synergistic dispersion technology for 30-60 minutes; step 3, extruding the mixed solution into a coagulating bath through a wet spinning process, and performing multi-stage stretching, washing and drying to obtain nascent fibers; 4, performing high-temperature heat treatment and plasma surface modification on the nascent fiber to enhance the continuity of the conductive network; and step 5, coating the surface of the fiber with a polydopamine-metal composite layer. The invention belongs to the technical field of high-performance fiber preparation, and particularly provides a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which optimizes filler selection, a dispersion process and fiber structure design, is high in electromagnetic shielding effectiveness, is suitable for a lightweight environment, and is high in environmental adaptability.

Recycling wind turbine blades includes shredding, crushing, and milling the wind turbine blades to yield a multiplicity of particles including glass fiber and sieving the particles to yield a multiplicity of pellets including glass fibers. Manufacturing a composite coaxial fiber includes providing a first, second, and third polymer composition to yield a composite coaxial fiber precursor, processing the composite coaxial fiber precursor to yield a coagulated composite coaxial fiber precursor, drawing the coagulated composite coaxial fiber precursor, and heating the drawn coagulated composite coaxial fiber precursor to yield the composite coaxial fiber. The second polymer composition can include the recycled glass fibers. The resulting composite coaxial fiber includes an inner and outer layer including polyacrylonitrile and a middle layer between the inner layer and the outer layer. The middle layer includes polyacrylonitrile and a multiplicity of the recycled glass fibers.

The invention relates to the technical field of functional fiber materials, in particular to a fiber material with an antibacterial function and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing composite antibacterial powder; s2, preparing antibacterial functional particles; s3, preparing a spinning solution; s4, performing wet spinning and post-treatment to obtain the fiber material with the antibacterial function. A triple antibacterial system is formed by constructing the ferroferric oxide core body, the zinc oxide middle layer and the chitosan shell and is fused into the fiber preparation process, and the fiber material which is excellent in antibacterial effect, resistant to washing and good in environmental adaptability and has the antibacterial function is obtained.

The invention discloses a controllable degradation antibacterial filament fiber and a preparation method thereof, a calcium alginate filament fiber is prepared by using a wet spinning technology, and the calcium alginate filament fiber is strongly modified by physical and chemical methods respectively. The chemical modification adopts a cross-linking agent for modification, and the physical modification adopts cellulose nanocrystal (CNC) as a reinforcing material. The tensile breaking strength is improved to 43.25 cN / dtex from 16.35 cN / dtex which is not modified, the tensile breaking strength is improved by 2.6 times, and the degradation period is prolonged to 7 days from 2 days. On the basis, berberine is introduced into the fiber, so that the mechanical enhancement effect can be further achieved by means of the electrostatic attraction effect between materials, the antibacterial performance is obtained, and the antibacterial rate can reach 95.28%.

The invention relates to a preparation method of a 3D printing high-density cell tubular vascular graft. The preparation method comprises the following steps: sucking a supernatant obtained by centrifuging a cell suspension away and only remaining bottom pure cells; the preparation method comprises the following steps: uniformly stirring and mixing OMA, pig gelatin and an LAP photoinitiator in a Hank's solution to form a hydrogel precursor solution; extruding the pure cells and the hydrogel precursor solution from a three-axis nozzle by using printing equipment, and immersing the pure cells and the hydrogel precursor solution into a calcium chloride solution; lyase is added to degrade the hydrogel precursor solution, the hydrogel precursor solution is completely degraded, and an independent single-layer pipeline structure with only a remaining pure cell layer is obtained. The invention provides a method for manufacturing high-density pure-cell lumen constructs to mimic native blood vessels by using a self-made microfluidic coaxial 3D bioprinting device. And after the support hydrogel on the inner layer and the outer layer is removed, a single-layer tubular structure of high-density MOVAs only limited to pure cells is obtained. The cells in the pure cell vascular constructs exhibit good cell viability and cell function.

The invention provides a viscose aerogel fiber with a skin-core structure and a preparation method and application thereof.The viscose aerogel fiber comprises a skin layer and a core layer, the raw materials of the core layer comprise mesoporous silica, a two-dimensional nano material and viscose A. The raw materials of the skin layer comprise a silane coupling agent and viscose B, through the design of the components of the skin layer and the core layer and the regulation and control of the structures, on the premise that the flexibility and the spinnability of the viscose fiber are kept, the obtained viscose aerogel fiber can have both high heat insulation property and excellent mechanical stability.

The invention discloses a heteroaromatic polyamide fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out polymerization reaction on a raw material system comprising a diamine monomer containing a heterocyclic structure, an aromatic diacyl chloride monomer and a composite solvent to obtain an aromatic heterocyclic polyamide solution; mixing the heteroaromatic polyamide solution with Lewis acid to prepare a spinning solution; the spinning solution is subjected to gel spinning, gel filaments are obtained, the gel filaments enter a coagulating bath to be coagulated and plasticized and stretched, washing, drying and hot stretching are carried out, and the aromatic heterocyclic polyamide fiber is obtained. The heteroaromatic polyamide fiber prepared by the method is compact in structure and high in orientation degree, and the orientation degree is 0.92-0.97; the mechanical property is excellent, the tensile strength is 33-41 cN / dt, and the elongation at break is 4.2%-6.1%. Compared with traditional wet spinning, the method has the advantages of high spinning speed and high production efficiency, and is suitable for industrial production.

The utility model provides a coagulating bath tank for producing a hollow fiber membrane. The coagulating bath tank comprises a bath tank body, a godet wheel group and a partition plate assembly, the godet wheel set comprises a fixed godet wheel and a movable godet wheel, the fixed godet wheel is fixed to the bottom of an inner cavity of the bath body, and the movable godet wheel is slidably connected to the top of the bath body. A plurality of isolation cavities are formed between the partition plate assemblies and the inner cavity wall of the bath body and between every two adjacent partition plate assemblies; according to the coagulating bath, the bath body is divided into a plurality of isolation chambers through the partition plate assemblies, after primary membrane filaments enter the bath body, the membrane filaments are guided to move in the inner cavity of the bath body through the fixed filament guide wheel, the membrane filaments are guided to discharge water through the movable filament guide wheel, and the retention time of a hollow fiber membrane in the coagulating bath is adjusted. The internal space of the bath body can be freely separated by adjusting the partition plate assembly during use, the composition of the coagulating bath can be freely changed or aqueous solutions in different spaces can be independently replaced, the use efficiency of the solutions can be effectively improved, and waste is reduced.

The invention discloses a regenerated cellulose fiber based on gel spinning and a preparation method and application thereof, and belongs to the technical field of bio-based high performance. The preparation method comprises the following steps: activating a cellulose raw material with water / DMAc double solvents, and dissolving the activated cellulose raw material in a LiCl / DMAc system to form a spinning solution with the concentration of 5-15wt%; the solution is extruded out of a methanol coagulating bath with the temperature lower than the spinning solution gel point through a gel spinning technology, and the drafting rate is larger than or equal to 5 times; the nascent fiber is subjected to solvent replacement, washing and drying, and the regenerated cellulose fiber is obtained. The tensile strength of the prepared regenerated cellulose fiber reaches 664 MPa (2.2 times of that of viscose), and the elastic modulus is 41 GPa; the fiber roundness index is 0.80, and the surface smoothness Ra is less than or equal to 0.1 mu m (SEM verification); and the raw material cost is reduced by 30%.

The invention provides a multifunctional aerogel fiber based on a waste firefighter uniform fabric and a preparation method thereof, and belongs to the technical field of textile material recovery. The method comprises the following steps: separating aramid fiber 1313, aramid fiber 1414 and conductive fiber from the waste firefighter uniform; dissolving step by step, and compounding with sulfonated MXene to prepare a spinning solution; forming a gel fiber precursor through wet spinning, and spirally winding and stranding; performing supercritical carbon dioxide treatment to construct a porous structure; and finally coating a functional skin layer. Spiral winding stranding is adopted to replace traditional parallel stranding, interface micro-fusion is generated in combination with supercritical carbon dioxide, and mechanical interlocking and hydrogen bond strengthening between fibers are synchronously achieved; the continuity of the conductive network is enhanced through sulfonated MXene modification, and the solvent system difference is avoided through beam splitting spinning. The prepared aerogel fiber has the characteristics of high strength, high conductivity and high temperature resistance, and solves the problems of poor interface bonding and single function of various fibers in the waste firefighter uniform.

The present invention relates to the technical field of knitted fabrics, in particular to an antibacterial and anti-ultraviolet bio-based lyocell fabric and a preparation method thereof. The fabric comprises a three-layer composite structure connected by bio-based lyocell yarns: an outer layer is formed by weft-knitting a composite yarn formed by nylon-66 fiber and a first functional fiber, wherein the first functional fiber comprises bio-based lyocell fiber, thermochromic zinc oxide particles, nanosilver / graphene hybrid material, a hydrophobic pore switch polymer, and a cross-linking agent; an intermediate layer is formed by weft-knitting a second yarn formed by a second functional fiber, wherein the second functional fiber comprises bio-based lyocell fiber, temperature-sensitive microcapsules, a humidity-expanding gel, and is composed of an acrylic acid / sodium alginate interpenetrating network; a heat-conducting graphene sheet, and other functional additives; and a third functional fiber in the inner layer comprises bio-based lyocell fiber, Janus-type double-sided microcapsules, a porous graphene framework, a phase change material, and other regulators.

The invention discloses a polyimide aerogel fiber as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: 1, synthesizing a polyamide acid solution; 2, adding acrylic acid, polyethylene glycol, a photoinitiator and a cationic surfactant into the polyamide acid solution, and mixing to form a spinning solution; step 3, carrying out wet spinning on the spinning solution, and then entering a coagulating bath to form initial gel fibers; step 4, performing ultraviolet light curing on the initial gel fibers to form gel fibers; and 5, carrying out chemical imidization treatment on the gel fiber, then carrying out stretching treatment, and carrying out supercritical CO2 drying after solvent replacement so as to obtain the polyimide aerogel fiber. Under the synergistic effect of multiple components of the spinning solution, the polyimide aerogel fiber is endowed with excellent mechanical properties and high porosity in cooperation with gelation and ultraviolet curing in a coagulating bath, and the polyimide aerogel fiber can be applied to preparation of heat insulation materials.

The invention belongs to the field of intelligent materials, and discloses a nematic phase liquid crystal elastomer fiber and a method for optimizing the thermal shrinkage performance of the nematic phase liquid crystal elastomer fiber. According to the method, the mass ratio of a cross-linking agent pentaerythritol tetra (3-mercaptopropionate) (PETMP) to a chain extender 2, 2 '-[1, 2-ethanediyl bis (oxygen)] bis (ethanethiol) (EDDET) in an LCE spinning solution is accurately controlled through a wet spinning technology, and drafting and heat treatment processes are combined, so that the LCE fiber with adjustable and controllable heat shrinkage performance and mechanical performance is prepared. The invention aims to overcome the limitations of low response speed, low shrinkage rate, insufficient environmental stability and the like of the existing LCE fiber. The reversible thermal shrinkage rate of the fiber can reach up to 35%, the maximum shrinkage deformation can be completed within 2 seconds at the soonest at the temperature of 80 DEG C, and the maximum tensile strength can reach 170 MPa. And the catalyst has excellent oxidation stability (the mass retention rate is about 97%), and can maintain efficient thermal response in a water environment. And a new way is provided for development of high-performance intelligent materials.

The invention discloses a recombinant protein and application thereof in preparation of sodium alginate fibers. The recombinant protein is obtained by fusion expression of a functional protein and at least one alginic acid binding domain protein. The amino acid sequence of the alginic acid binding domain protein is as shown in at least one of SEQ ID No. 1, SEQ ID No. 2 and SEQ ID No. 3. The recombinant spider silk protein with the alginic acid CBM region can exert the material science characteristics in a sodium alginate-calcium ion system, the mechanical property of alginic acid fiber is greatly enhanced, and meanwhile, the biological activity of protein can be provided for an alginate fiber system.

Modified regenerated collagen fibers which have improved water resistance and heat resistance problematic in regenerated collagen fibers, impart heat shape memory ability, are excellent in stretchability (tenacity) and the feel of the surfaces, and have no coloring. The modified regenerated collagen fibers contain a component (A), which is vinylbenzoic acid or a salt thereof, or a polymerized product containing the component (A) as a constituent monomer in the regenerated collagen fibers.

The invention provides an anti-ionizing radiation fiber with high filling amount, high strength and high elasticity and a preparation method and application thereof, and belongs to the field of functional fiber materials.The preparation method comprises the steps that rare earth nitrate and citric acid are dissolved in an acidic alcohol aqueous solution, heated and stirred, the pH value is adjusted, sol is obtained, the sol is subjected to secondary heating treatment to obtain gel, and the gel is dried to obtain the high-filling-amount high-strength high-elasticity anti-ionizing radiation fiber. Aging, drying, grinding and calcining the gel to obtain rare earth composite powder; wherein the rare earth nitrate is a mixture of gadolinium nitrate, dysprosium nitrate and cerium nitrate; adding polyurethane into a mixed solution of DMF and xylene, stirring, adding the rare earth composite powder, stirring, and defoaming to obtain a spinning solution; preparing nascent fibers from the spinning solution through wet spinning; and drawing, washing and drying to obtain the anti-ionizing radiation fiber. The anti-ionizing radiation fiber prepared by the invention has excellent shielding property, mechanical property and air permeability.

The application relates to the technical field of aerogel fiber preparation, and discloses a polyimide aerogel fiber and a preparation method and application thereof. The preparation method comprises the following steps: preparing a polyamide acid precursor spinning solution; spinning the polyamide acid precursor spinning solution through a wet spinning method, winding and standing in a coagulation bath to obtain a polyimide wet gel fiber; and performing solvent replacement on the polyimide wet gel fiber and rapidly drying the polyimide wet gel fiber under normal pressure to obtain a polyimide aerogel fiber. The preparation method is simple, avoids the use of a lengthy drying process and expensive drying equipment, and successfully realizes continuous molding preparation, and has a good large-scale preparation prospect. The aerogel fiber prepared by the application has excellent tensile strength, which can reach 20.5 MPa; and has low density (0.34-0.53 g.cm ‑3 -3), high porosity (63-76%) and excellent heat insulation performance, and the thermal conductivity can be as low as 36.9 W.m ‑1 -1.K ‑1 -1; and has good heat preservation effect in various complex occasions.

The invention discloses a preparation method and application of a photoelectric collaborative flexible optical fiber, and belongs to the technical field of multifunctional flexible optical fiber preparation. Conductive fibers are prepared through a wet spinning / melt co-extrusion spinning process, the conductive fibers are placed in a hollow part of a hollow cladding preform of an optical fiber, and the photoelectric synergistic flexible optical fiber sensor is obtained through synchronous hot wire drawing. According to the invention, the flexible electrode is combined with the transparent high polymer material with good light guide performance to form the photoelectric cooperative sensing flexible optical fiber sensor with both light response and electric response, and the unique optical fiber structure not only achieves the photoelectric cooperative sensing function, but also plays a role in packaging the flexible electrode, so that the durability of the optical fiber sensor is higher. The fiber has excellent performances of flexibility, fatigue resistance and the like, can be used as optical fiber sensing equipment for monitoring human joint movement, and has huge application potential in the fields of optical fiber communication, sensing detection, biomedical treatment and the like.

The invention relates to the field of flame-retardant textile fabrics, and provides a comfortable flame-retardant aramid fabric and a preparation method thereof. The composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m is prepared by adopting the design of multielement blended composite fibers of hydroxyapatite / magnesium hydroxide composite filler, meta-aramid polymer, para-aramid polymer, polybenzimidazole and the like through a hydro-thermal synthesis process of performing silanization surface activation and accurately controlling the molar ratio of calcium to phosphorus to be 1.60-1.67. The preparation method comprises the following steps: preparing the composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m; then industrial production processes such as graded shearing dispersion, continuous wet spinning, multi-stage stretching heat setting and after-finishing are performed, so that synergistic improvement of flame retardant performance and comfort performance is achieved, and the technical problems that a traditional aramid fiber fabric is poor in flame retardant effect, poor in comfort, unstable in processing performance and the like are solved; the fabric has wide application value in high-end application fields such as fire protection clothing, industrial protection textiles and military protection equipment.

The utility model discloses meta-position aramid fiber coagulating bath automatic adjusting equipment which comprises a bottom plate, a coagulating bath tank is arranged on the left side of the upper end of the bottom plate, a coagulating bath blending box is arranged at the upper end of the bottom plate, a coagulating bath online concentration meter is arranged on the coagulating bath blending box, and the coagulating bath online concentration meter comprises a detection head. The detection head extends into the coagulating bath blending box, and a bearing plate is arranged on the right side above the bottom plate. The problems that manual water replenishing of an existing coagulating bath is labor-consuming and troublesome, the manual water replenishing mode is prone to causing large concentration fluctuation of the coagulating bath, accuracy and controllability of the coagulating bath cannot be guaranteed, one-time water replenishing can cause too low local concentration of the coagulating bath, the coagulating bath needs a long time to keep stable concentration, and daily use requirements cannot be met are solved. The device has the advantages of automatically replenishing water and accurately controlling the concentration of the coagulating bath, and solves the problems of large fluctuation, untimely adjustment and the like of the conventional coagulating bath.

The invention discloses a modified ultra-high molecular weight polyethylene fiber as well as a preparation method and application thereof. The modified ultra-high molecular weight polyethylene fiber is prepared from 100 parts by mass of ultra-high molecular weight polyethylene resin, 3-10 parts by mass of modified nano composite ceramic particles, 2-8 parts by mass of modified aramid fiber, 1-5 parts by mass of modified carbon nanotubes and 1-3 parts by mass of an auxiliary agent through the processes of a two-stage blending method, dry-wet spinning, gradient hot stretching, pulse heat setting and the like. The tensile strength of the prepared modified ultra-high molecular weight polyethylene fiber is greater than 4.5 GPa, the elongation at break is kept at 5.0-5.5%, the cutting resistance is as high as 310N, the puncture resistance is as high as 465N, and the modified ultra-high molecular weight polyethylene fiber can be applied to protective products.