580results about "Spinning solutions preparation" patented technology

The present invention belongs to the technical field of fiber materials, and relates to a composite fiber containing nano natural tea fibers, and a preparation method and application thereof. The raw materials for preparing the composite fiber include nano natural tea fibers and basic fiber pulp, and the nano natural tea fibers are mate nano fiber microemulsions. The present invention integrates nanotechnology into the preparation of natural tea fibers, and adopts a microemulsion method to simultaneously and evenly disperse a variety of effective ingredients in tea in the mate nano fiber microemulsion, so that the multifunctionality of the fabric can be effectively exerted; the microemulsion system has high uniformity and long-term stability, and during the spinning process, the nano tea fibers can be highly dispersed in the spinning solution without the need for additional surfactants, and the effect of the functional fabric finally obtained can be long-lasting. In addition, mate tea is rich in tea polyphenols and unique yerba mate alkaloids, which can further improve the comprehensive performance of the composite fiber.

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 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 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.

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.

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.

Disclosed are sulfated cellulose nanofibrils, methods of making sulfated cellulose nanofibrils, and methods of spinning the sulfated cellulose nanofibrils into high-strength fibers. The sulfated cellulose nanofibrils may be formed using a chlorosulfonic acid treatment.

The present invention relates to an elastomer material comprising cashew gum and, at least, another polymer, and a method for obtaining same based on an electro-hydrodynamic and / or aero-hydrodynamic processing of a previously prepared mixture of cashew gum and another polymer.

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 present invention provides a super-tough cellulose aerogel fiber, a preparation method thereof and an application thereof. Specifically, it includes using a wet spinning technology to prepare a cellulose molecular-level solution with cellulose polymers as raw materials; using the cellulose molecular-level solution as a spinning solution, and in the spinning process, the cellulose polymers undergo in-situ self-assembly and hydrogen bond cross-linking reactions to form a multi-level nanofiber structure; the nanofiber structure is a continuous three-dimensional multi-level pore network structure. The cellulose aerogel fiber prepared by the technical solution of the present invention not only has excellent physical properties such as high strength and high toughness, but also, due to its multi-level pore structure, it has good adsorption and heat preservation properties, enabling it to be applied not only in the field of knitting technology, but also in the technical fields of air purification, heavy metal adsorption, atmospheric inhalable particulate matter adsorption, indoor harmful gas adsorption, filter materials or heat insulation materials, and can be widely applied.

Disclosed in the present invention are a preparation method for a lyocell bamboo fiber, and a lyocell bamboo fiber. The preparation method comprises the preparation steps of: (1) directly mixing a pulp containing at least one type of bamboo pulp with an NMMO aqueous solution containing a modifier so as to obtain a pulp paste, wherein the modifier at least contains two active groups; and (2) dehydrating and dissolving the pulp paste to obtain a spinning solution, wherein the relaxation time spectrum of the spinning solution has a bimodal distribution, and spinning the spinning solution by means of a spinning device, followed by washing with water, oiling and drying, so as to obtain a lyocell bamboo fiber. The pulp of the present invention is directly mixed with the NMMO aqueous solution containing the modifier so as to form the pulp paste, without subjecting the pulp paste to other treatments, thereby fully retaining antimicrobial components in the pulp; the pulp paste can be dehydrated and dissolved at a low temperature to obtain the spinning solution, thus avoiding the degradation of the spinning solution caused by an overly high temperature; moreover, the relaxation time spectrum of the spinning solution has a bimodal distribution, that is, different stress distributions are present within the fiber during cellulose molding, thereby being conducive to the retention of active antimicrobial small molecules within the bamboo pulp.

The invention discloses a preparation method and application of a composite flame-retardant fabric, and relates to the technical field of flame-retardant fabrics. The invention discloses a composite flame-retardant fabric. The flame-retardant flame-retardant composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of meta-aramid, 25 to 35 parts of a first modified organic phosphorus flame retardant, 10 to 15 parts of a third modified organic phosphorus flame retardant, 20 to 30 parts of first modified organic silicon rubber, 8 to 15 parts of third modified organic silicon rubber, 12 to 18 parts of nano zinc oxide and 4 to 7 parts of octadecyl dimethyl hydroxyethyl ammonium nitrate, the water-based paint is prepared from the following components in parts by weight: 6 to 10 parts of carboxyl-terminated nitrile rubber, 5 to 8 parts of ultra-high molecular weight polyethylene micro powder, 3 to 5 parts of an anti-aging agent, 1 to 3 parts of dicyclohexylcarbodiimide, 0.3 to 1 part of 4-dimethylaminopyridine, 3 to 5 parts of amino silicon oil micro-emulsion, 4 to 7 parts of an organic fluorine waterproof agent, 2 to 4 parts of sodium polyacrylate, 2 to 4 parts of chitosan quaternary ammonium salt, 0.1 to 0.5 part of citric acid and 350 to 550 parts of deionized water. The fabric has various excellent properties such as efficient flame retardance, thermal stability, flexibility and wear resistance, and is low in toxicity, environment-friendly, light, thin, breathable, anti-aging, anti-static and wide in application.

To provide an electrospinning solution that can reduce environmental burden and enables stable and favorable electrospinning of fibers with a low irritating odor.SOLUTION: An electrospinning solution used for electrospinning comprises ethyl cellulose, ethanol, and water, wherein the content of the ethyl cellulose relative to the total mass of the solution is 4 mass% or more, the ratio of the content of the ethanol and the water relative to the total mass of the solution (water / ethanol) is more than 0.1 and less than 0.55, and the content of acetic acid relative to the total mass of the solution is 1 mass% or less.SELECTED DRAWING: None

The utility model relates to an impregnation swelling system, which comprises a first impregnation module, a second impregnation module, a regulation and control module and a slurry module, the first impregnation module comprises an impregnation container, and a guide roller and a slurry plate are integrally impregnated in the impregnation container; the second dipping module comprises a conveying mechanism, at least three liquid squeezing assemblies and a plurality of spraying mechanisms, the liquid squeezing assemblies are arranged at intervals in the conveying direction of the conveying mechanism and used for squeezing out part of the solvent in the pulp board, and the spraying mechanisms are arranged between at least two adjacent liquid squeezing assemblies; the regulation and control module comprises a supporting plate and a tooth-shaped compression roller matched with the supporting plate, and the tooth-shaped compression roller is used for extruding redundant solvent in the pulp board so as to regulate the mass ratio of the solvent to fibers in the pulp board; the pulp porridge module comprises first crushing equipment, and the first crushing equipment is used for crushing the pulp board into pulp porridge; the system can meet the implementation requirements of a new dipping and swelling process, is more environment-friendly and energy-saving, is more uniform in swelling, and can ensure that the mass ratio of fibers to a solvent in slurry congee meets the process requirements.

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 belongs to the technical field of lyocell fibers, and specifically relates to high-enthalpy phase-change temperature-regulating lyocell fibers and a preparation method thereof. The preparation method of the high-enthalpy phase-change temperature-regulating lyocell fibers comprises the following steps: using a mixture of n-octadecane, n-nonadecane, and n-heneicosane as a capsule core material, polyurethane as an inner capsule wall, and a product of gelatin and gum arabic as an outer capsule wall to prepare phase-change temperature-regulating microcapsules; adding cellulose pulp to a cellulose solvent to prepare a cellulose spinning solution; adding phase-change temperature-regulating microcapsules to an aqueous solution of a low-concentration cellulose solvent to prepare a phase-change temperature-regulating microcapsule dispersion system; and mixing the cellulose spinning solution and the phase-change temperature-regulating microcapsule dispersion system to prepare high-enthalpy phase-change temperature-regulating lyocell fibers. The high-enthalpy phase-change temperature-regulating lyocell fibers prepared by the present invention have good dispersibility and compatibility of the phase-change temperature-regulating microcapsules contained therein in the fibers, and have good phase-change temperature-regulating function and toughness.