513 results about "Regenerated cellulose" 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 relates to a regenerated cellulose-based composite metal organic framework diaphragm as well as a preparation method and application thereof. The diaphragm comprises: a substrate, which is made of regenerated cellulose; the surface of the regenerated cellulose is connected with a sulfonic acid group; the sulfonic acid group establishes a 3D sulfonic acid group network on the surface of the regenerated cellulose; the metal organic framework is arranged on the surface of the substrate; the metal organic framework and the regenerated cellulose can be connected at least through electrostatic interaction and coordination bond interaction. The technical problem to be solved is how to provide a composite diaphragm formed by tightly and stably combining regenerated fibers and a metal organic framework, so that the prepared diaphragm is good in mechanical property and electrochemical property.

The invention discloses a preparation method of flexible hydrogel and application of the flexible hydrogel in a pressure sensor, and belongs to the field of flexible sensors. According to the hydrogel disclosed by the invention, polyvinyl alcohol and regenerated cellulose are used as a hydrogel skeleton, and carboxylated carbon black is doped as a conducting medium. The preparation method comprises the following steps: carrying out carbonization treatment on microcrystalline cellulose in a tubular furnace at high temperature to obtain high-conductivity carbon black; then, functional groups are introduced into the carbon black through modification treatment; the method comprises the following steps: dissolving paper pulp in N-methylmorpholine-N-oxide (NMMO), and carrying out cooling, solidification, dialysis and other process treatments to obtain regenerated cellulose; the flexible conductive hydrogel is obtained by adding conductive carbon black and regenerated cellulose into a PVA solution with a certain concentration and introducing sodium tetraborate at the same time. The regenerated cellulose in the hydrogel is rich in a large number of hydrogen bonds, and the flexibility and the self-healing performance of the hydrogel are remarkably improved through the interaction among the hydrogen bonds. The method disclosed by the invention is simple to operate, the prepared hydrogel has better elasticity, self-healing property and conductivity, and the practical application of the hydrogel in the field of flexible sensors is widened.

Disclosed in the present invention are a flame-retardant PC / ABS composition with a fiber point effect, a preparation method therefor, and a use thereof. The flame-retardant PC / ABS composition with the fiber point effect according to the present invention comprises the following components: a polycarbonate, an ABS resin, a flame retardant, a high-temperature-resistant fiber point, and an anti-dripping agent, wherein the high-temperature-resistant fiber point is a regenerated cellulose fiber having a melting point of greater than or equal to 300ºC. In the flame-retardant PC / ABS composition with the fiber point effect according to the present invention, the high-temperature-resistant fiber point is used instead of a conventional carbon fiber- or glass fiber-reinforced conventional material, so that when the PC / ABS composition is combusted and contracted under heat, the anti-dripping agent can contract and gather at the high-temperature-resistant fiber point serving as a node to greatly slow down the perforation rate, and a carbon layer structure with a star-net-shaped dense distribution can be formed to isolate flame and heat, thus significantly improving flame-retardant properties. Moreover, the impact properties of the PC / ABS composition can also be better maintained, and the surface of the PC / ABS composition has a point-like aesthetic appearance effect similar to that of paint spraying.

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%.

This invention relates to a biomass-based gel electrolyte membrane, its preparation method, and its application. The method includes preparing regenerated cellulose using a sol-gel method, adding sodium alginate and zinc chloride solution, and rapidly constructing a biomass-based composite gel electrolyte with a dual-network structure through metal ion coordination crosslinking. The biomass-based gel electrolyte membrane is obtained by adsorbing an aqueous electrolyte onto a gel membrane with a dual-network structure. This gel electrolyte membrane is then assembled with a zinc anode and a vanadium pentoxide cathode to obtain a zinc-ion battery. This invention features a simple method, readily available and inexpensive raw materials, easy product molding, convenient operation and control, and is conducive to industrial production. The prepared composite gel electrolyte membrane has a dual-network structure, exhibiting good stability, liquid retention capacity, and ionic conductivity, and demonstrates excellent cycle capacity and lifespan when applied to aqueous zinc-ion batteries.

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 relates to the technical field of papermaking, in particular to a preparation method of high-definition electronic screen protection paper. According to the method, regenerated cellulose fibers serve as main raw materials, functional composite fibers of a core-shell structure are constructed, a core layer is the regenerated cellulose fibers, a shell layer is a polypyrrole / graphene composite conductive layer, and the lasting antistatic performance is achieved; meanwhile, the surface-modified nano silicon dioxide aerogel particles are introduced, so that the optical performance and the mechanical strength are improved; then compounding with polyimide fibers modified by a silane coupling agent, adding a bio-based wet strength agent and a fluorocarbon defoaming agent, and carrying out the steps of plasma pretreatment, pulping, on-net papermaking, controllable drying, magnetron sputtering surface treatment and the like to prepare the protective paper. The obtained protective paper has the characteristics of being ultrathin, high in strength, high in light transmittance, lasting in antistatic property and the like, and is suitable for protection of high-end liquid crystal display screens and OLED screens.

The invention relates to the technical field of medical materials, and discloses degradable medical gauze based on plant fibers and a production process of the degradable medical gauze. 0.5 to 2.0 parts of tannic acid; 0.1 to 1.0 part of boric acid; and 100 parts of a 1-allyl-3-methylimidazole chloride salt. The production process comprises the following steps: dissolving the raw materials in an ionic liquid to form a homogeneous solution, coating to form a film, then carrying out solidification regeneration treatment in an alcohol-water solution, controlling the residual quantity of the ionic liquid in a final product, and finally drying. In the solidification step, part of ionic liquid residues are controlled to serve as an internal plasticizer, meanwhile, an antibacterial component tannic acid is embedded in a cellulose matrix, long-acting and stable functions are achieved, the problems that a traditional regenerated cellulose material is rigid, and functional components are prone to falling off are solved, and the service life of the regenerated cellulose material is prolonged. The obtained gauze has biodegradability, flexibility and long-acting antibacterial property at the same time.

The invention discloses a moisture-absorbing, breathable and flatly wrapped flexible elastic six-layer fabric, and an application and a preparation method thereof, and belongs to the technical field of functional textile materials. According to the invention, the regenerated cellulose fibers, the spandex filaments, the semi-dull polyester filaments and the cross-section absorption and discharge semi-dull polyester filaments are used as raw materials, and through a specific weaving process, the soft elastic six-layer sandwich fabric with moisture absorption, breathability and smooth wrapping feeling is obtained. The fabric has the advantages of moisture absorption, breathability, softness, skin friendliness, elastic bearing feeling, smooth appearance and elastic recovery wrapping feeling, and is suitable for products such as fitted covers, pillowcases and clothes in four seasons.

The invention relates to the field of functional fabrics, in particular to an antistatic warm-keeping rabbit wool silk fabric. Which comprises a body, the body comprises a surface layer and a bottom layer connected with the surface layer, and is characterized in that the surface layer comprises 40-50% of regenerated cellulose fibers, 8-15% of spandex, 2-5% of rabbit wool and the balance acrylic fibers; the fiber content of the bottom layer is as follows: 22-30% of regenerated cellulose fiber, 3-5% of silk, 8-15% of spandex and the balance of acrylic fiber. The bottom layer containing silk and the surface layer containing rabbit wool are formed, so that the fabric has better antistatic property, heat preservation property and pilling resistance.

There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; disposing an opacification layer on at least a portion of at least one surface of said film by a first offset printing step; and disposing printed information on at least a portion of said opacification layer by a second offset printing step.

The invention discloses biomass hard carbon and a preparation method and application thereof, and belongs to the technical field of carbon material preparation. The preparation method of the biomass hard carbon comprises the following steps: providing a dissolving solution of cellulose / chitin; adding the waste biomass into the dissolved solution, and stirring to obtain a solution dissolved with cellulose / chitin; directly adding a pickling solution for pickling to obtain regenerated cellulose / chitin; finally, pre-oxidation crosslinking and high-temperature carbonization are conducted, and the biomass hard carbon is prepared. According to the invention, the crystallinity of the regenerated cellulose is regulated and controlled, and a crystalline region and an amorphous region of the regenerated cellulose are reasonably matched, so that the derived biomass hard carbon has rich closed-cell structures and closed-cell rate and brings excellent electrochemical performance to a sodium-ion battery as a negative electrode material. The preparation method is mild in treatment condition and simple in treatment process, does not need to consume a large amount of acid and alkali, and has the advantages of high efficiency, economy and environmental friendliness.

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 discloses an anti-ultraviolet portable high-elastic sunscreen clothing fabric and a preparation method thereof. The fabric is sequentially compounded with a skin-friendly layer, a high-elastic breathable layer, an anti-ultraviolet functional layer and a protective outer layer from inside to outside. The skin-friendly layer is formed by blending natural bamboo fibers and chitosan-containing regenerated cellulose antibacterial fibers according to the ratio of 7: 3, and it is ensured that the skin is comfortable and antibacterial; the high-elastic breathable layer is of a warp-knitted elastic mesh structure formed by blending 15-20 wt% of spandex and chinlon, and has both elasticity and breathability. According to the anti-ultraviolet function layer, 80-100 g / m < 2 > polyester fiber base cloth is coated with a coating containing nanometer titanium dioxide and zinc oxide (the total mass accounts for 8-12% of the polyurethane coating, and the mass ratio is 2: 1), and efficient and lasting sun protection is achieved. The protective outer layer is formed by compounding a polytetrafluoroethylene microporous membrane and a polyester fabric, so that the protective performance is improved. During preparation, each layer is precisely processed by adopting a specific process, such as ultrasonic dispersion of nanoparticles and hot-pressing compounding of a hot melt adhesive, and is finally laminated, compounded and molded. According to the scheme, the problems that a traditional sunscreen garment fabric is poor in breathability, not lasting in sunscreen, poor in skin-friendly performance and the like are solved.

Plant-based nonwoven fabrics and methods of making the same are provided. The plant-based nonwoven fabric includes a plurality of regenerated cellulose fibers physically entangled with a plurality of cellulose pulp fibers. The plant-based nonwoven fabric has a first side and a second side, in which the first side and / or the second side has a three-dimensional (3D) image formed therein.

The invention belongs to the technical field of cellulose solvents, and discloses an amino acid ionic liquid cellulose solvent as well as preparation and application thereof. The general formula of the chemical structure of the cellulose solvent is formula I, R1 to R4 are respectively linear chain or branched chain alkyl and aryl, and Xm <-> is a group formed by hydrogen loss of carboxyl in amino acid. The invention also discloses a preparation method of the amino acid ionic liquid cellulose solvent. The preparation method is simple and efficient, natural amino acid is used, the cost is low, and the problem that metal equipment is seriously corroded by halogen-containing ionic liquid is solved. The amino acid ionic liquid provided by the invention realizes efficient dissolution of cellulose, and the dissolving liquid can be applied to preparation of a high-performance regenerated cellulose film material.

The invention discloses a non-woven fabric made of Juncao fibers, and belongs to the technical field of textiles. The non-woven fabric made of the Juncao fibers is obtained by opening and mixing modified Juncao regenerated cellulose fibers, carding to form a net and needling and reinforcing; the modified pennisetum sinese regenerated cellulose fiber is prepared by the following steps: dipping dried pennisetum sinese pulp, squeezing, carrying out graft copolymerization on the squeezed dried pennisetum sinese pulp, 2-acrylamide-2-methylpropanesulfonic acid and benzaldehyde PEG acrylamide under the catalysis of ceric ammonium nitrate, dissolving, then adding chamomile essential oil microcapsules, reacting, and spinning. The chamomile essential oil microcapsule is prepared by the following steps: dispersing chamomile essential oil into a continuous phase containing an allyl monomer by an SPG membrane emulsification method to form a microemulsion, and preparing the chamomile essential oil microcapsule by combining an interfacial polymerization method; wherein the allyl monomer is prepared from methacrylic acid, methyl methacrylate, pentaerythritol tetraacrylate and N-(4-acetylphenyl) prop-2-acrylamide.

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.

The invention relates to the technical field of conductive materials, in particular to conductive paper and a preparation method thereof. Wherein the conductive paper is prepared from 40.9 to 86.4 parts of polypyrrole / fiber composition, 1.4 to 48.7 parts of regenerated cellulose, 0.36 to 32.5 parts of glycerol and 5 to 10 parts of water, the polypyrrole / fiber composition is prepared from pyrrole, ferric trichloride and mixed fibers, and the mass ratio of the pyrrole to the ferric trichloride to the mixed fibers is (0.9 to 1.2) to (1.8 to 2.4) to (1.0 to 2.4) according to the mass of absolute dry fibers. By adopting the technical scheme provided by the invention, the mixed fibers can provide more attachment sites for pyrrole polymerization in the pyrrole polymerization process, so that polypyrrole forms more silk chains, the uniform spreading and continuity of polypyrrole in the conductive paper are improved, and the conductive paper is endowed with better conductive performance.

There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; and disposing printed information on at least a portion of said transparent film by an offset printing step, wherein said transparent film introduced into said offset printing device further comprises an ink-receptive layer on at least one surface of said substrate layer.

A filter material for manufacturing a segment of a smoking article is described. The filter material includes a hydro-entangled nonwoven, which includes fibers. The fibers are selected from the group consisting of pulp fibers, fibers of regenerated cellulose and mixtures thereof. These fibers are contained in the nonwoven in an amount of 50% to 100% of the mass of the hydro-entangled nonwoven. The nonwoven is in the form of a web, has a longitudinal direction in the running direction of the web, a cross direction orthogonal thereto and lying in the plane of the web and a thickness direction orthogonal to longitudinal direction and the cross direction. The nonwoven is shaped to have a wave structure in the plane formed by the cross direction and the thickness direction with a wave height from 50 μm to 1000 μm and a wave length from 150 μm to 5000 μm.

The present invention relates to an absorbent hygienic article (10) for absorbing body fluids The absorbent hygienic article comprises a topsheet (12), an acquisition distribution layer (14), an absorbent core (16) and a backing layer (18), wherein the acquisition distribution layer is arranged between the topsheet and the absorbent core. The topsheet is a nonwoven material comprising cellulose-based fibres. The acquisition distribution layer is a nonwoven material comprising continuous filaments made of regenerated cellulose, which continuous filaments are multibonded by a combination of merged filaments, hydrogen bonding and physical intermingling of the filaments. The invention further relates to a method of manufacturing the absorbent hygienic article.

The invention discloses a preparation method of gelatin-based hemostatic particles containing oxidized regenerated cellulose, the hemostatic particles are composed of gelatin, oxidized regenerated cellulose and polyethylene glycol, the gelatin is crosslinked by EDC / NHS to control the degradation time, a small amount of oxidized regenerated cellulose is supplemented to improve the hemostatic ability, and a small amount of polyethylene glycol is supplemented to improve the hydrophilicity. The prepared hemostatic particles are high in hemostatic speed, short in degradation time and excellent in biology.

The invention discloses a cellulose tube and a preparation method thereof, and belongs to the technical field of natural polymer materials. The preparation method comprises the following steps: S1, dissolving cellulose in an organic alkali aqueous solution to obtain a cellulose solution; s2, immersing a glass rod into the cellulose solution obtained in the step S1, taking out the glass rod, and immersing the glass rod into a poor solvent for regeneration; s3, taking out, washing and drying to obtain a layer of regenerated cellulose hydrogel; and S4, repeating the steps S1-S3, finally immersing the glass rod into the poor solvent for soaking, removing the glass rod to obtain cellulose hydrogel, immersing the cellulose hydrogel into the poor solvent for soaking, taking out the cellulose hydrogel, and drying to obtain the cellulose tube. The method is simple in preparation process, free of freeze drying, low in production cost and environmentally friendly, and the obtained cellulose tube has good mechanical properties and structural stability.

The present application relates to the technical field of pharmaceutical formulations and provides zedoary turmeric oil / oxidized regenerated cellulose embolization microspheres, a preparation method therefor, and use thereof. In the present application, with zedoary turmeric oil as a core solution, a mixed solution of oxidized regenerated cellulose, sodium alginate, and gelatin as a shell layer solution, and a divalent or trivalent metal salt solution as a receiving solution, the zedoary turmeric oil / oxidized regenerated cellulose embolization microspheres are prepared by means of a coaxial electrostatic spraying method. The zedoary turmeric oil / oxidized regenerated cellulose embolization microspheres prepared in the present application have a marked core-shell structure, are uniform in size and good in sphericity, can effectively hide the pungent smell of zedoary turmeric oil, improves the stability of zedoary turmeric oil, and enables directed embolization in tumor blood vessels, thereby reducing toxic and side effects. In addition, the embolization microspheres prepared in the present application have good mechanical properties; therefore, the microspheres can effectively resist deformation under compression and prevent fragmentation within the body, enabling firm embolization of zedoary turmeric oil at the tumor vascular site.

An aerosol-generating article (10)(100)(1000) comprises: an aerosol-generating substrate (12)(112)(1004); a downstream element (42)(150)(1008) provided downstream of the aerosol-generating substrate (12)(112)(1004) and in axial alignment with the aerosol-generating substrate, the downstream element comprising a cellulosic filtration material. The fibrous material comprises a plurality of regenerated cellulose fibres selected from one or more of viscose fibres, modal fibres, Lyocell fibres and viscose rayon fibres; or a plurality of natural fibres selected from one or more of flax fibres, hemp fibres, jute fibres, kenaf fibres, ramie fibres, abaca fibres, phormium fibres, sisal fibres, coir fibres, cotton fibres, and kapok fibres. The cellulosic fibrous material further comprises an additive coating applied to the plurality of regenerated cellulose or natural fibres, the additive coating comprising at least 5 percent by weight of exogenous lignin on a dry weight basis.

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 provides a multifunctional composite fabric and a preparation method thereof, and relates to the technical field of composite fabrics, the multifunctional composite fabric comprises warp yarns and weft yarns, the warp yarns are synthetic fibers I, and the weft yarns are composite yarns; the composite yarns comprise conductive silk yarns and composite yarns covering the conductive silk yarns, and the composite yarns comprise regenerated cellulose fibers and synthetic fibers II; the quantity ratio of the regenerated cellulose fibers to the synthetic fibers II is (25-35): 1. The composite yarn coating layer can protect the conductive filaments from being damaged in the weaving and using processes, and the overall wear resistance of the fabric is improved; the weft yarns and the warp yarns which are composed of the regenerated cellulose fibers and the synthetic fibers II in a specific proportion are matched, so that the fabric has excellent wear resistance and soft hand feeling, and the technical problems that in the prior art, the compatibility of different fibers is poor, the hand feeling of the fabric is rigid, and the wear resistance is reduced are solved; the fabric can be widely applied to the fields of clothes, home textiles and the like.