414results about "Monocomponent cellulose artificial filament" patented technology

The invention belongs to the technical field of cellulose dissolution, and particularly relates to a method and a solvent for promoting cellulose dissolution and application of the solvent in preparation of high-strength regenerated cellulose fibers. The invention finds for the first time that when a common solvent system of silicon dioxide and cellulose is subjected to ball-milling mixing, the obtained solvent composition not only improves the solubility of the cellulose, but also can obtain a stable spinning solution after dissolving the cellulose, and improves the strength of the regenerated cellulose fiber prepared from the solvent composition.

The invention discloses a multi-stage flow guide double-sided anisotropic sanitary surface layer spunlace material and a preparation method thereof, and relates to the technical field of textile manufacturing. The preparation method of the sanitary surface layer spunlace material comprises the following steps: opening, carding and cross lapping a fiber raw material to obtain a front surface fiber web and a back surface fiber web, overlapping the front surface fiber web and the back surface fiber web in a manner that the front surface is on the upper side and the back surface is on the lower side, performing spunlace reinforcement, finishing after reinforcement, and finally drying and winding to obtain the sanitary surface layer spunlace material. Wherein the front fiber net is made of all-cotton fibers, and the gram weight is 30-50 g / m < 2 >; the reverse side fiber net is made of mixed fibers, and the gram weight is 40-60 g / m < 2 >; the reverse fiber net is obtained by mixing modified regenerated cellulose fibers, polyurethane fibers and bamboo pulp fibers according to the mass ratio of (10-30): (5-10): 100.

The invention discloses a continuous bamboo fiber preparation method, and belongs to the technical field of bamboo fiber preparation. The blasted bamboo wood is subjected to enzymolysis; the bamboo wood subjected to enzymolysis is conveyed into a separator to be continuously separated, and fiber bundles are obtained; preparing a fiber suspension from the fiber bundles, and screening to obtain purified fiber bundles; the purified fiber bundles are drafted; freezing the drafted fiber bundles, then unfreezing the fiber bundles, and then drying the fiber bundles to obtain the continuous bamboo fibers. By adopting the continuous bamboo fiber preparation method disclosed by the invention, the bamboo fibers with excellent performance, high purity and good uniformity can be prepared, the problems of poor fiber quality, insufficient stability and the like existing in a traditional method are effectively solved, the production efficiency can be improved, the environmental pollution and energy consumption are reduced, the production cost is reduced, and the method is suitable for industrial production. And high performance, continuity and green economy are considered.

The disclosure relates to a lyocell material, and a filter for a smoking article, including the lyocell material, and a smoking article. The lyocell material and the filter for a smoking article, according to the disclosure, may replace conventional cellulose acetate materials and filters for a smoking article that include the same.

The invention belongs to the field of cellulose materials, and particularly relates to a functional cellulose fiber as well as a preparation method and application thereof. The functional cellulose fiber comprises a core structure formed by fiber raw materials and a skin layer structure formed by functional components, the skin layer structure covers the surface of the core structure, and the functional components are selected from one or more of silk fibroin, sodium alginate and soybean protein. The cellulose functional fiber with the skin-core structure is prepared, the core layer is a cellulose layer, high strength is provided, the skin layer is a functional layer, and good comfort is provided.

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 present disclosure provides a novel type of fiber monofilament for use in place of non-sustainable cotton. The fiber monofilaments comprise at least 50% by weight of non-regenerated microfibrillated cellulose (MFC), an amino-functional polymer component, and an epoxy-functional crosslinker. In addition, the present disclosure provides a product comprising the fiber monofilament and a method of making the fiber monofilament.

The invention discloses a bamboo pulp lyocell fiber production method, which comprises: (1) preparing a bamboo dissolving pulp, loading bamboo chips into a pot, preheating, raising the temperature in the pot to 110-130 DEG C, introducing medium-pressure steam, rapidly raising the temperature in the pot to 160-170 DEG C, injecting a pre-hydrolysis liquid formed by mixing hot water and an acidic catalytic auxiliary agent from the bottom of the pot, and carrying out thermal insulation at a temperature of 165-175 DEG C for 30-120 min; and (2) dissolving NMMO, namely mixing the dissolving pulp prepared in the step (1) with an NMMO aqueous solution, mechanically stirring and uniformly mixing for 10 minutes at 90 DEG C, then carrying out vacuum dehydration, gradually raising the temperature to 105 DEG C from 90 DEG C, starting timing when the temperature is raised to 105 DEG C, and dissolving for 40 minutes. According to the production method and the production equipment of the bamboo pulp lyocell fiber, the pentosan content can be effectively reduced, the reaction uniformity can be improved and the preparation requirements of the bamboo-based lyocell fiber can be met through the specific preparation method and the processes such as steam preheating and temperature rising combined with liquid-phase extraction and prehydrolysis.

The invention provides a waste cotton fabric synchronous decolorization and cellulose dissolution regeneration method based on a deep eutectic solvent, and relates to the technical field of waste cotton fabric recovery treatment. According to the method disclosed by the invention, the in-situ decoloration of the dye in the cotton fabric and the efficient dissociation of a cellulose hydrogen bond network are synchronously realized under the process condition of 30-100 DEG C by selecting the specific eutectic solvent, so that the decoloration and the dissolution are cooperatively completed in the same step; and the problem of fiber damage or incomplete decoloration caused by condition conflict in step-by-step treatment is effectively avoided. On the basis, the dye and the eutectic solvent are synchronously replaced and separated in a coagulating bath by combining wet spinning, so that the process is simplified, and the high mechanical property of the regenerated cellulose fiber is realized. Besides, the dye and the deep-eutectic solvent in the process can be recycled, a resource full-circulation green technical path is formed, and a solution with a wide application prospect is provided for high-valued regeneration of the waste textiles.

The invention discloses a method for preparing high-performance carbon microspheres based on classification of waste cotton textiles, which comprises the following steps: aiming at the waste cotton textiles which are accumulated in the open air and have obvious aging difference, firstly carrying out mechanical opening and impurity removal and photocatalytic decontamination pretreatment, and then sorting the aging degree through a carbonyl sensitive fluorescent probe and laser irradiation, so as to obtain the high-performance carbon microspheres. The heavily aged hydrophobic fibers and the lightly and moderately aged hydrophilic fibers are obtained. Treating the lightly and moderately aged fibers with an ionic liquid repairing system, and then preparing regenerated high-strength fibers by adopting magnetic control liquid crystal spinning; the heavily aged fiber is subjected to catalyst-free hydrothermal carbonization and gradient KOH activation pore expansion, and the graded pore carbon microspheres are prepared. According to the method, different aged fibers are accurately utilized, the performance of regenerated products is improved, pollution is reduced, and the resource utilization rate and additional value of the waste cotton textiles are increased.

The invention discloses a bionic tree-shaped evaporator based on hollow microtubes and application thereof, and relates to the technical field of solar water treatment.The bionic tree-shaped evaporator is prepared through the following steps that bacterial cellulose hybrid spinning solution serves as shell layer fluid, absolute ethyl alcohol serves as core layer fluid, the shell layer fluid and the core layer fluid are co-extruded into an ethyl alcohol coagulating bath, curing is conducted, washing is conducted with ethyl alcohol and deionized water in sequence to be neutral, and drying is conducted to obtain the bionic tree-shaped evaporator. A hollow hybrid microtube is obtained; and arranging and fixing the plurality of hollow hybrid microtubes on a bracket according to a tree-shaped branch structure to obtain the bionic tree-shaped evaporator. The bionic tree-shaped evaporator prepared by the invention has excellent mechanical flexibility, salt tolerance and purification efficiency, and provides a new material and a new scheme for efficient and sustainable solar seawater desalination and wastewater treatment.

The preparation method of the regenerated cellulose fiber provided by the embodiment of the invention comprises the following steps: S1, mixing cellulose pulp with compound enzyme and glycine, performing enzyme treatment, and performing ultrasonic treatment to obtain activated pulp; s2, mixing and swelling the activated pulp with an NMMO aqueous solution, lysine and oxidized nanocellulose, and performing vacuum dehydration dissolution, dry-jet wet spinning and gradient coagulating bath forming to obtain nascent fibers; s3, adding the nascent fiber into an aspartic acid / citric acid mixed solution, and performing UV catalytic crosslinking treatment to obtain the regenerated cellulose fiber. The cellulose supramolecular structure is precisely regulated and controlled through compound enzyme-amino acid synergistic pretreatment, the transverse binding force of the fibers is reinforced on the molecular level by combining nanocellulose enhancement and the UV catalytic in-situ crosslinking technology, the fibrillation problem of the regenerated cellulose fibers is fundamentally solved, and the regenerated cellulose fibers have the advantages of being high in mechanical strength, high in mechanical strength and the like. Meanwhile, good mechanical property, dyeing property and hydrophilic comfort are achieved.

The invention provides a multi-stage synergistic wound repair nanofiber membrane and a preparation method thereof. The composite fiber membrane sequentially comprises an electrostatic spinning pullulan / tannic acid / tranexamic acid nanofiber membrane for promoting the formation of blood clots, a polydopamine / calcium chloride modified electrostatic spinning cellulose acetate membrane with coagulating, antibacterial and repairing effects, and a chitosan composite cellulose non-woven fabric, and the electrostatic spinning pullulan / tannic acid / tranexamic acid nanofiber membrane is a wound surface contact layer. The nanofiber membrane has the functions of a physical hemostasis barrier and continuously releasing regeneration promoting biological signals, and a dynamic hemostasis healing process is formed.

The invention belongs to the technical field of high polymer materials and textile fibers, and particularly relates to a method for preparing regenerated cellulose short fibers by an ionic liquid method, which comprises the following steps of: (1) premixing crushed pulp and ionic liquid to form slurry; (2) feeding the slurry obtained in the step (1) into a double-screw extruder, and dissolving to obtain a cellulose spinning solution; (3) conveying the cellulose spinning solution obtained in the step (2) into a coagulating bath to obtain nascent fibers; and (4) stretching, washing, oiling, drying, curling and cutting the nascent fiber obtained in the step (3) to obtain the regenerated cellulose short fiber. In the regenerated cellulose short fiber preparation process, a solvent recovery system is adopted for ionic liquid recovery. The preparation method of the regenerated cellulose short fiber is efficient and mild in dissolution process, simple and energy-saving in solvent recovery, and the obtained fiber is excellent in mechanical property.

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 belongs to the technical field of fibers, and particularly relates to a preparation method of bionic tire fat fibers, and the preparation method comprises the following steps: preparation of 6-O-carboxymethyl chitosan, preparation of a modified chitosan monomer, preparation of a core material solution, preparation of a bionic tire fat composite material, blending, spinning and post-treatment. Chitosan is used for modifying carboxymethyl and unsaturated double bonds and then copolymerized with diethylene glycol monovinyl ether to coat the bionic tire fat component, so that the bionic tire fat component is protected and prevented from being lost due to the influence of an acid-base environment and temperature in the fiber preparation process, and meanwhile, a good slow-release effect is achieved; after multiple times of washing, the loss is less, and the functionality is durable and stable; through detection, the loss rate of the bionic body fat component in the fiber preparation process is lower than 1%, the loss rate of the bionic body fat component is lower than 5% after the fiber is washed with water for 50 times, and a good slow-release effect is achieved.

The invention relates to the technical field of protein modified fibers, and particularly discloses a functional protein composite cellulose fiber as well as a preparation method and application thereof. The invention relates to a preparation method of a functional protein composite cellulose fiber. The preparation method comprises the following steps: 1) uniformly mixing components including nano silicon dioxide coated zinc oxide particles and deionized water to prepare a ZnO / SiO2 mother solution; 2) uniformly mixing components including a cellulose raw material and a solvent to prepare a cellulose spinning solution; the solvent is composed of quaternary ammonium base and a cosolvent; 3, the ZnO / SiO2 mother solution and the cellulose spinning solution are taken and mixed, the mixture is injected into a coagulating bath to be coagulated and formed, and the functional protein composite cellulose fiber is obtained.The prepared functional protein composite cellulose fiber has the advantages of being low in ZnO / SiO2 wastage rate and good in compatibility and has the lasting deodorization, antibacterial and bacteriostatic functions.

To provide a lyocell fiber capable of maintaining a temperature control function for a long period of time and absorbing formalin, and a method for manufacturing the same.SOLUTION: There is provided a lyocell fiber, that contains cellulose, micro-capsule having a core-cell structure, and a formalin scavenger. The micro-capsule is crosslinked with a lyocell fiber matrix and a formalin scavenger, a core of the micro-capsule contains a phase change material and a nano-nucleating agent, and cells of the micro-capsule contain a melamine-modified urea-formaldehyde resin prepolymer. A method for manufacturing a lyocell fiber includes: a spinning solution preparation step in which cellulose pulp, N-methylmorpholine-N-oxide, micro-capsule having a core-cell structure, and a formalin scavenger are mixed and post-treated; a spinning step in which the spinning solution obtained through the spinning solution preparation step is spun; and a microwave treatment step in which a yarn obtained through the spinning step is subjected to a microwave treatment step.SELECTED DRAWING: Figure 1

The invention relates to the field of electrical paper raw materials, and discloses a superfine low-loss electronic fiber as well as a preparation method and application thereof. According to the invention, the fiber raw material is prepared by the preparation method aiming at the gossypium hirsutum, and the fiber width of the fiber raw material is finer than that of common sisal hemp pulp fiber, Manila hemp pulp fiber and Chinese alpine rush pulp fiber, the strength is higher, the liquid absorption property is better, and the loss of the electrolytic capacitor diaphragm is more favorably reduced; after cooking, acid and ultrasonic waves are adopted to treat the slurry in a synergetic mode, dissolution of metal impurities in the slurry can be greatly increased, then the dissolved impurities are fixed through a metal chelating agent, readsorption is prevented, and the content of the metal impurities in the slurry can be effectively reduced after washing. The fiber prepared by the method is superfine, low in loss, high in strength and high in liquid absorbency, and is not only suitable for manufacturing a low-voltage electrolytic capacitor diaphragm, but also suitable for manufacturing a high-voltage electrolytic capacitor diaphragm.

The invention relates to a preparation method of a degradable cellulose acetate-based nanofiber membrane with high-efficiency photocatalytic performance, which comprises the following steps: based on a green and environment-friendly concept, taking degradable cellulose acetate as a substrate, and adding zinc oxide / tin oxide heterojunction nanoparticles which are prepared by a one-step sintering method and have high-efficiency photocatalytic performance into the substrate; and the nanofiber membrane is prepared through electrostatic spinning. The nanofibers are uniform in thickness, and the surface roughness of the membrane is improved after the heterojunction nanoparticles are added, so that the hydrophilicity is improved. After oil-water separation, the problem of oil contamination blockage is effectively solved by utilizing the photocatalytic performance of the heterojunction nano-particles, and meanwhile, compared with a single-photocatalyst oil-water separation membrane, the recombination rate of photon-generated carriers is reduced through synthesis of the heterojunction nano-particles, and the photocatalytic performance is effectively improved. The prepared degradable cellulose acetate-based nanofiber membrane with the efficient photocatalytic performance has a good separation effect on various oil-in-water emulsions, and the rejection rate of the degradable cellulose acetate-based nanofiber membrane can reach 99% or above.

The invention provides an MXene / CNF composite mesoporous fiber material as well as a preparation method and application thereof. The preparation method comprises the following steps: injecting an MXene / CNF spinning solution into an acetic acid coagulating bath, fishing out the MXene / CNF spinning solution, and air-drying the MXene / CNF spinning solution to obtain the MXene / CNF composite mesoporous fiber material, the MXene / CNF spinning solution is a dispersion liquid of nano cellulose and MXene in water. According to the MXene / CNF composite mesoporous fiber material with high conductivity and narrow distribution, the mesoporous structure not only effectively transfers stress, but also contributes to rapid transmission of electrons and ions, has a relatively high application prospect in the fields of electromagnetic shielding, wave absorption, energy storage device electrodes and flexible sensors, and can be widely applied to the fields of electromagnetic shielding, wave absorption, energy storage device electrodes and flexible sensors. And a novel multifunctional platform is expected to be provided for wearable electronic equipment, electronic skin, human body motion monitoring equipment and the like.

The present disclosure relates to a modified regenerated cellulosic fiber. Said modified regenerated cellulosic fiber comprises a regenerated cellulosic fiber having 0.015-1.5 wt% of a modifier composition infused therein, wherein the modifier composition comprises a dispersion of 0.003-0.2 wt% of metal oxide in 0.005-1.5 wt% of zeolite, based on weight of cellulose.

The invention relates to a cellulose-based luminescent material as well as a preparation method and application thereof. Comprising the following steps: dissolving cellulose in ionic liquid to form a cellulose solution; dissolving a phosphor and a stabilizer in a cosolvent to form a phosphor solution; the stabilizer is selected from at least one of N, N '-diisopropyl carbodiimide, N, N'-di-tert-butyl carbodiimide, N, N '-diphenyl carbodiimide and N, N'-dicyclohexylcarbodiimide; uniformly mixing the cellulose solution and the phosphorescent agent solution to form a cellulose-based phosphorescent solution; and immersing the cellulose-based phosphorescent solution into a coagulating bath to obtain the cellulose-based luminescent material. The technical problem to be solved is how to provide a cellulose-based luminescent material which has excellent water resistance, high phosphorescence efficiency and long phosphorescence life and can be applied to the fields of information encryption, underwater rescue, ion detection and the like. Meanwhile, the process is simple and convenient, green and environment-friendly, and the prepared cellulose-based luminescent material is multicolor and adjustable.

To provide a resin composition, a pellet containing the same, and a molded article, enabling a molded article to achieve superior flowability during molding and excellent mechanical properties.SOLUTION: A resin composition comprises a thermoplastic resin (A) including a polyacetal resin (a1) having a melt flow rate (190°C, 2.16 kg load) of 20 to 60 g / 10 min, and regenerated cellulose fibers (B). It is preferable that the regenerated cellulose fibers (B) include solvent-spun regenerated cellulose fibers. A proportion of the thermoplastic resin (A) relative to the total mass of the resin composition is preferably 30 to 95 mass%, and a proportion of the regenerated cellulose fibers (B) is preferably 5 to 70 mass%.SELECTED DRAWING: None

The present invention relates to the field of regenerated cellulose technology, and more particularly to a functional modified regenerated cellulose fiber, its preparation method, and its application. The functional modified regenerated cellulose fiber comprises the following raw materials by weight: 100-120 parts regenerated cellulose fiber, 2-5 parts antimicrobial agent, and 1250-1350 parts ionic liquid. The regenerated cellulose fiber of the present invention has good tensile strength, can adhere to other functional materials, and has good antimicrobial properties and heat stability.

To provide means capable of manufacturing a purified ion liquid capable of preventing a decrease of a molecular weight of a cellulose when dissolving the cellulose, that is, excellent in temporal storage stability and thermal stability.SOLUTION: At least one ionic liquid selected from the group consisting of imidazolium-based ionic liquids, pyridinium-based ionic liquids, ammonium-based ionic liquids, phosphonium-based ionic liquids, and cyclic amidinium-based ionic liquids is brought into contact with an inorganic adsorbent and purified under the conditions satisfying at least two of the following (1) to (3) to manufacture purified ion liquid; (1) an amount of the inorganic adsorbent is 0.5 to 20 pts.mass with respect to 100 pts.mass of the ionic liquid; (2) a contact temperature is 25 to 120°C; (3) a contact time is 10 minutes or more.SELECTED DRAWING: None

The application discloses a flame retardant with a microcapsule structure, a flame-retardant fiber and a preparation method and application thereof, the flame retardant comprises a core material and a shell covering the core material, the core material is a phosphazene flame retardant compound, and the shell is inorganic nanoparticles; the structure of the phosphazene flame retardant compound is shown as formula I: wherein, R1 is selected from R2 is selected from -OCH3, a benzene ring, and the application simultaneously introduces the elements phosphorus, nitrogen and silicon with flame retardant performance into the flame retardant compound and prepares a microcapsule structure; the outer layer has exposed hydroxyl groups, can form hydrogen bonds with hydroxyl groups on cellulose, and improves the binding force between the flame retardant and the cellulose. The flame-retardant Lyocell fiber prepared by using the flame retardant can simultaneously have excellent flame retardancy, mechanical properties and washing resistance, and the flame retardant has a small use and addition amount and a high effective incorporation rate.

The invention relates to a method for producing spunbonded fabric (1), wherein a spinning material (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) in order to form filaments (5), and each of the filaments (5) is stretched in the extrusion direction, wherein the filaments (5) are laid on a perforated conveyor device (10) in order to form a spunbonded fabric (1), and the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) aligned in the transverse direction (12) relative to the conveyor direction (11) of the conveyor device (10) such that the spunbonded fabric (1) formed on the conveyor device (10) is stretched in said transverse direction (12). The aim of the invention is to allow a reliable adjustment of the spinning width and the weight distribution per surface unit of the spunbonded fabric or allow the weight distribution per surface unit to be kept constant during an ongoing operation using said method. This is achieved in that the spinning material throughput (31) of the nozzle holes (4) is variably set along the transverse direction (12).

A semiconductor material and a multilayer semiconductor material are earth-conscious and are less harmful to living organisms. The semiconductor material has fibers containing, as a main component, a filament derived from at least any one of a wood material, a plant fiber (pulp), an animal, an alga, a microorganism and a product produced by a microorganism, and has N-type negative resistance. It is preferred that the fibers include bundles of cellulose nanofibers (CNFs), and the width of each of the bundles be 30 to 50 nm. It is also preferred that the fibers are fibers in which a plurality of hydroxy groups and a plurality of carbonyl groups be bound to cellulose.