404results about "Spinning solutions preparation" patented technology

The present invention relates to the field of the preparation of polyurethane elastic fibers, and relates to a preparation method for a bio-based polyurethane elastic fiber, comprising: preparing polyether polyol from sucrose, glycerol, dimethylamine and propylene oxide; adding a solvent, i.e., N,N-dimethylacetamide, and polyether polyol and polyisocyanate into a reaction tank, and adding p-Toluenesulfonyl semicarbazide and aluminum methylenebis(2,4-di-tert-butylphenoxy) phosphate to prepare a spinning solution; and subjecting the spinning solution to spinning and oil application by means of dry spinning technology to obtain the bio-based polyurethane elastic fiber. The present invention ensures that the properties of polyurethane elastic fibers do not deteriorate or are partially enhanced, while the cost and performance advantages are achieved.

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 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 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.

To provide a method of manufacturing fibers having improved comfort and water and odor adsorption properties.SOLUTION: There is provided a method for making fibers, the method including: doping a liquid polymer with zeolite particles encapsulated in a sealing material, wherein the zeolite particles have an average diameter of 0.2 to 50 micron (inclusive) and are present in fibers at a concentration of 250 to 25,000 parts per million; forming fibers from the particle-doped polymer; and treating the fiber with 5 to 25% NaOH, LiOH, or KOH at about 80°C to 100°C for about 15 to 45 minutes to remove a portion of a surface layer of the fiber to form weight-reduced fibers, wherein the portion of the surface layer of the fiber that is removed has a thickness of about 0.1 to 10 times the average diameter of the zeolite particles, and wherein the fiber forms a multifilament yarn or a staple fiber with an odor adsorption or an odor activity value (OAV) of at least 15.SELECTED DRAWING: None

The invention relates to the technical field of para-aramid dyeing, in particular to a para-aramid colored fiber preparation method, which comprises: uniformly dispersing a coloring pigment in concentrated sulfuric acid to form a coloring liquid, and uniformly dispersing a spinning polymer in concentrated sulfuric acid to form a spinning stock solution; mixing part of the spinning solution with the coloring solution to form a pigment spinning solution; the pigment spinning solution is mixed with the remaining spinning stock solution to form a colored spinning solution, the colored spinning solution enters a spinneret plate to be subjected to dry-jet wet spinning, then the colored spinning solution is subjected to coagulating bath, alkali washing and water washing and then dried, and the para-aramid colored fiber is prepared; wherein in the air bath process of dry-jet wet spinning, the temperature is controlled to be 50-90 DEG C, and the relative humidity is 40-70%. According to the preparation method of the para-aramid colored fiber, uniform and stable distribution of pigments in the fiber is facilitated, and when color systems are replaced in production, the cleaning time of equipment and pipelines can be effectively shortened, raw material waste is reduced, and the production cost is reduced.

The application discloses a preparation method of a samarium trioxide doped lead zirconate titanate lead niobate piezoelectric fiber sensor. The application first prepares samarium trioxide doped lead zirconate titanate lead niobate ceramic; the ceramic is ground into powder and added into a sodium alginate solution, sodium dodecyl sulfate and citric acid are sequentially added, excessive water is added into the solution to obtain a low-viscosity slurry; then ball milling is carried out to break the agglomerates and obtain a uniform suspension, finally the slurry is injected into a CaCl2 solution to obtain a fiber, and the fiber is dried at room temperature and then calcined for the third time. The application precisely controls the molar ratio of raw materials, the reaction temperature, the reaction time and the doping ratio, guarantees the high-quality preparation of PNN-PZT / x Sm2O3 ceramic and fiberized piezoelectric ceramic, and makes the prepared piezoelectric fiber sensor have excellent piezoelectric performance and can more sensitively detect external signals.

The present invention provides super-tough cellulose aerogel fibers, a preparation method thereof, and uses thereof. The preparation method adopts wet spinning technology, prepares a cellulose molecular-level solution using a cellulose polymer as a raw material, uses the cellulose molecular-level solution as a spinning solution, and causes in-situ self-assembly and hydrogen bond cross-linking reaction of the cellulose polymer in the spinning process to form a multi-layer nanofiber structure, and the nanofiber structure is a continuous three-dimensional multi-stage pore network structure. The cellulose aerogel fibers prepared by adopting the technical solution of the present invention not only have excellent physical properties such as high strength and high toughness, but also have good adsorption and heat preservation performance due to their multi-stage pore structure, and can be applied not only to the technical field of textiles, but also to technical fields such as air purification, heavy metal adsorption, inhalation particulate matter adsorption, indoor harmful gas adsorption, filter materials or heat insulation materials, and can be widely applied.

An optimized process for the preparation of a spinning solution for the production of acrylic fiber precursors (PAN) of carbon fibers and an optimized process for the production of carbon fibers from said acrylic precursor (PAN), are described.

According to one embodiment aspect of the present invention, there is provided a method of separating cellulose and polyester from a material comprising a blend of cellulose and polyester, the method comprises the steps of mixing a material comprising a blend of cellulose and polyester with a first portion of a super base-based ionic liquid to dissolve the first portion of cellulose and form a first cellulose solution and a first residue comprising polyester, removing the first residue comprising polyester from the first cellulose solution, and directing the first cellulose solution to one or more further processing steps.

A method of integrated and improved one-step production of carbon fiber precursors is described, in particular from comonomer start up until the spinning step to obtain the final fiber precursor.

According to the spinning solution based on the acrylonitrile terpolymer and the preparation method of the spinning solution, the thermal stability of a product is remarkably improved, excessive crosslinking or thermal cracking in the pre-oxidation process can be avoided, the viscosity stability is enhanced, the gelling or layering phenomenon in the storage process is reduced, the preparation period is shortened, the reaction time is far shorter than that of a traditional method which is 8-12 h, and the spinning solution is suitable for industrial production. The method has the advantages of simple operation, high monomer conversion rate, reduction of the solvent recovery difficulty and the production cost, suitableness for large-scale industrial production of the high-end polyacrylonitrile-based carbon fiber precursor, and important significance for promoting high-end and low-cost development of carbon fibers.

The disclosed subject matter relates to methods for the dispersion processing of high aspect ratio nanomaterials, such as boron nitride nanotubes, into macrostructures. For example, the disclosed subject matter relates to boron nitride nanotube fibers and films, and methods of making and use thereof. In some examples, the methods are surfactant-free and / or sonication-free.

The invention relates to a polyacrylonitrile spinning solution, a polyacrylonitrile-based carbon fiber and preparation and application thereof, and the polyacrylonitrile-based carbon fiber is obtained by polymerization spinning, pretreatment, pre-oxidation and carbonization. According to the preparation method, the spinning spinnability and the original yarn orientation degree are improved through the composite spinning solution additive, the pre-oxidation time is shortened to 20-30 min through pretreatment, and a skin-core structure is eliminated; the prepared carbon fiber has excellent mechanical properties, and the process is environment-friendly and is suitable for industrial production.

The present application relates to a kind of good spinnability ultra-high molecular weight polyethylene fiber, its manufacturing method and its application.The manufacturing method of the ultra-high molecular weight polyethylene fiber of the present application includes the following steps: 1) make ultra-high molecular weight polyethylene with solvent at first temperature first mixing, then second mixing at second temperature higher than the first temperature, prepare spinning solution, 2) the spinning solution is spun into the ultra-high molecular weight polyethylene fiber, wherein the simple supported beam impact strength of the ultra-high molecular weight polyethylene is 30-120kJ / m 2 The present application selects raw material with less entanglement by testing simple supported beam impact strength, and then forms highly uniform spinning solution by two-stage swelling, so that the state of raw material is consistent during disentanglement, achieving good spinnability effect, fiber product linear density is low, and good evenness is good, more suitable for fabric application.

The present invention relates to a method for manufacturing a flash spun nonwoven fabric, the raw material of which is polyethylene, and the basis weight of the flash spun nonwoven fabric is 35 g / m 2 The compression ratio P of the flash evaporation material is greater than 0.07 gf cm / cm. 2 The flash evaporation material has a low haze decay rate, and the compression ratio work is tested using a KES-style tester and FB3, the haze decay rate ΔW of the flash evaporation material is 0.3% to 1.5%, where ΔW = (W0 - W5) / W0 * 100%, and the heat insulation rate decay rate ΔS of the flash evaporation material is 7% to 15%, where ΔS = (S0 - S5) / S0 * 100%. This application utilizes modification of the spinning raw material to improve the performance of the flash evaporation material and expand its application range.

A process to produce cellulose ester fibers is provided, the process comprising: a. mixing cellulose ester and at least one solvent at a temperature ranging from about 60 ℃ to less than 90 ℃ to produce a cellulose ester dope; wherein the solvent comprises N, N-dimethylformamide, N, N-dimethylacetamide, or dimethyl sulfoxide, or mixtures thereof; and b. spinning the cellulose ester dope through at least one spinneret to produce the cellulose ester fibers; wherein the cellulose ester fibers have improved color over cellulose ester fibers produced from dope mixed outside about 60 ℃ to less than 90 ℃.

The invention discloses a device and a method for preparing diacetate fiber tows with adjustable total denier. The device comprises a dissolving kettle, a filtering system, a gear pump, a pressure sensor, a spinneret cap assembly, a channel, a wire feeding roller and a motor. Wherein the spinneret cap assembly is provided with an adjustable opening adjuster, and the number of the fan-shaped adjusting units is increased or decreased to control the effective opening number of the spinneret orifices, so that the total denier number of tows is continuously adjusted. And in cooperation with rotation speed adjustment of the gear pump, the production requirements of tows of different specifications can be met, and efficient and flexible preparation of the tows with multiple total deniers is achieved. The method comprises the steps of dissolving, filtering, spinning and total denier adjusting, and accurate control over the total denier number is achieved by synchronously adjusting the number of the fan-shaped adjusting units and the rotating speed of the gear pump. The device is compact in structure, convenient to adjust, good in sealing performance and suitable for large-scale production of the diacetate fiber tows.

The invention relates to the technical field of biomedical engineering and intelligent medical instruments, in particular to a conductive hydrogel suture line and a preparation method and application thereof. The preparation method comprises the following steps: adding bacterial cellulose and 3, 4-ethylenedioxythiophene, and carrying out an in-situ polymerization reaction to obtain a BC / PEDOT composite solution; and preparing continuous fibers by using a micro-fluidic wet spinning process, and further weaving the continuous fibers into a multi-strand structure to obtain the suture line. According to the suture line, high mechanical strength is achieved through micro-fluidic wet spinning and a K3 woven structure, the charge transfer behavior of a poly (3, 4-ethylenedioxythiophene) chain is regulated and controlled through bound water, and dual response to wound tension and exudate is achieved. The near-infrared photothermal antibacterial property and an intelligent classification system based on deep learning are combined, the wound state can be monitored and classified in real time, and the method is suitable for intelligent postoperative wound management.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

JPEG2026510465000008.jpg79170

A continuous process for the recycling of aramid fiber comprising the following steps: combining aramid fibrous material including non-continuous aramid fibers with sulfuric acid to obtain a spin dope comprising aramid, and processing the spin dope including aramid into a continuous aramid fiber. The invention also pertains to a continuous aramid fiber, preferably obtainable by said process, and to a multifilament yarn including the continuous aramid fiber.

The invention discloses a metal ion induced alginate aerogel fiber as well as preparation and application thereof. The method comprises the following steps: pre-mixing a sodium alginate solution with a coagulating bath solvent to obtain a uniform spinning solution; extruding the spinning solution into an alcohol coagulating bath through wet spinning to form sodium alginate primary gel fibers; then, introducing the nascent fiber into a calcium ion cross-linking solution with a specific concentration for cross-linking and curing; and finally, drying at normal temperature and normal pressure to obtain the calcium alginate aerogel fiber. The method is simple in process and low in cost, and the obtained fiber has wide application prospects in the fields of adsorption separation, heat insulation, tissue engineering and the like.

The present application provides a cellulose / acetyl cellulose composite fiber and a preparation method thereof, the preparation method comprising the following steps: mixing and crushing cellulose pulp and acetyl cellulose sheets, adding a low-concentration NMMO solution and a surfactant for stirring and impregnation, and obtaining a suspension after the material is fully mixed and impregnated; obtaining a blending spinning solution after the suspension is subjected to two-stage reduced-pressure evaporation and dehydration; and spinning the blending spinning solution by dry-jet wet spinning to obtain the composite fiber. The composite fiber prepared by the present application has the performance advantages of lyocell fiber and acetyl cellulose, excellent mechanical properties, and improved fibrillation performance. The fabric has the advantages of air permeability, skin friendliness, moisture absorption, easy drying, comfort, natural degradation, green environmental protection, and good application prospect in high-end textiles and garments.

Certain aspects of the disclosure concern a device including a nozzle configured to receive a heated polymer solution from a reservoir and a power supply configured to generate an electrostatic field between a tip portion of the nozzle and a substrate so as to draw a charged jet of the heated polymer solution out of the tip portion of the nozzle toward a substrate situated at an operating distance from the tip portion of the nozzle and form a polymer fiber on the substrate. The heated polymer solution is at an operating temperature that is greater than or equal to 40° C.

Provided is an anti-counterfeiting composition for anti-counterfeiting fibers, including a carrier, an anti-counterfeiting tracer and a dispersant, wherein the anti-counterfeiting tracer is composed of barium oxide, strontium oxide, aluminum oxide and zinc oxide, and a barium element content, a strontium element content, an aluminum element content, and a zinc element content in the anti-counterfeiting composition is controlled to a fixed feeding mass ratio; in percent by mass, the sum of the barium element content, strontium element content, aluminum element content, and zinc content accounts for 5-50% of the anti-counterfeiting composition; the carrier is a matrix polymer or a bio-derived oil. The anti-counterfeiting composition of the present disclosure can give the anti-counterfeiting fiber advantages of memory tracking properties and identification functions, high anti-counterfeiting capability, and good anti-counterfeiting concealment.

The present application relates to the technical field of aromatic polyamide polymer, in particular to a modified poly-p-phenyleneterephthalamide fiber with high elongation at break and a preparation method thereof.The present application introduces a small amount of 3,4'-diamino diphenyl ether and a fourth monomer containing a bis-amino phenoxy functional group during polymerization, and controls the molar ratio of the third monomer and the fourth monomer in the total amount of diamine monomer, thereby to a certain extent, the rigid molecular chain structure of the conventional p-aramid is destroyed, while the breaking strength of the fiber is maintained, the elongation at break of the polymer fiber is enhanced, the modified poly-p-phenyleneterephthalamide can still be prepared by dry spraying wet spinning process, the cost of building a new production line in the factory is saved, the process conditions and parameters are optimized, the fiber with stable elongation at break index is obtained, and the prepared fiber has an elongation at break of more than 3.6%.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

The present application relates to a production process of para-aramid fiber, in particular to a continuous spinning device and control method of para-aramid fiber. The device comprises: a feeding assembly for providing polymer material; a mixing assembly for mixing the material provided by the feeding assembly; a kneader for mixing the material with concentrated sulfuric acid to form a spinning dope; a spinneret for spinning the spinning dope to form a nascent fiber; a washing machine for washing the nascent fiber; a dryer for drying the washed nascent fiber to form a finished fiber; and a controller for controlling the running state of the spinning device in combination with the control method. The present application improves the feeding method of aramid spinning process, realizes continuous and stable spinning through the combination of different viscosity raw materials, reduces the viscosity requirement of the spinning process on the polymer raw material, and realizes the decoupling of the polymerization process and the spinning process in the existing para-aramid production process.