211 results about "Cellulose pulp" patented technology

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention discloses a preparation method of long-acting heat-storage warm-keeping antibacterial lyocell fibers, and belongs to the technical field of regenerated cellulose fibers. The preparation method of the lyocell fiber comprises the following steps: step SS1: stirring, mixing and dissolving cellulose pulp, an NMMO organic solvent, zirconium carbide micro powder and nano biochar according to a certain mass ratio at a certain temperature, and then defoaming and filtering to obtain a homogeneous phase mixed spinning solution with the fiber forming solid content concentration of 8%; and step SS2, spraying the obtained mixed spinning solution in air through a spray head, immersing the mixed spinning solution in a low-concentration NMMO aqueous solution for solidification forming, and then drafting, washing, cutting, washing, oiling and drying to obtain the finished fiber. The temperature rise speed of the heat-storage warm-keeping cellulose fiber fabric is far higher than that of a conventional lyocell fiber fabric, the temperature difference can reach 13.5 DEG C when a light source irradiates for 10 min, it is indicated that light energy can be effectively converted into heat energy in the presence of zirconium carbide in fibers, and the good warm-keeping effect is achieved.

The invention discloses a preparation method of a flame-retardant viscose fiber with an antibacterial function, which comprises the following steps: (1) under sufficient stirring, sequentially adding a phosphorus flame retardant, a dispersant and graphene oxide into deionized water with an alkaline pH value, and stirring and ball-milling to obtain a flame retardant dispersion liquid; (2) preparing a spinning stock solution by taking cellulose pulp as a raw material, and adding the flame retardant dispersion liquid into the spinning stock solution by adopting a pre-spinning injection method to prepare a blended spinning stock solution; (3) spinning the blended spinning stock solution in a coagulating bath, and reducing the blended spinning stock solution in an oxidation-reduction bath to obtain a formed tow; and after drafting, carrying out a post-treatment process to obtain the flame-retardant viscose fiber with the antibacterial function. The production process is optimized from multiple aspects such as selection of raw materials for preparing the flame retardant, oxidation reduction and the like, and the prepared flame-retardant viscose fiber has excellent flame retardance, good physical and mechanical properties and antibacterial properties and good wearability.

The present invention relates to a method for manufacturing a barrier layer for a paper or paperboard based packaging laminate. said method comprising: a) providing a barrier substrate comprising at least 50 wt % highly refined cellulose pulp (HRC) based on dry weight of the barrier substrate. said HRC having a Schopper-Riegler (SR) number above 80 as determined by standard ISO 5267-1, b) providing a transfer coating substrate comprising a vacuum coating layer and a backing layer separated by a release layer, and c) transferring the vacuum coating layer from the backing layer to the barrier substrate by a transfer coating process using an adhesive layer applied on the barrier substrate and / or the vacuum coating layer to obtain a barrier layer for a paper or paperboard based packaging laminate.

The invention relates to the technical field of pulping, in particular to a bamboo reed raw material biological fermentation cellulose pulping method and application thereof. Bacillus licheniformis, bacillus subtilis, bacillus pumilus and bacillus cereus are compounded into a complex microbial inoculant, the fermented bamboo reed raw material is used for pulping, all strains are mutualistic and synergistic, meanwhile, a rich complex enzyme system is provided, the prepared paper is good in physical performance and high in quality, pulping is conducted through biological treatment, and the paper is environmentally friendly and environmentally friendly. The use of a large amount of chemical agents in the traditional pulping is avoided, and the discharge of wastewater in the traditional pulping process is reduced.

The invention belongs to the technical field of cleaning cloth, and particularly relates to cleaning towel cloth made of a degradable material and a preparation method of the cleaning towel cloth. Uniformly mixing cellulose pulp, an N-methylmorpholine-N-oxide aqueous solution, the modification liquid and a fixing agent to obtain a fiber spinning solution, and preparing modified lyocell fibers by utilizing the fiber spinning solution; the modified lyocell fibers and cotton fibers are spun through compact spinning to obtain blended yarns, and then the blended yarns are used for weaving to obtain the cleaning towel cloth made of the degradable material. The modified liquid is prepared from the following raw materials: quaternized carboxymethyl chitosan, modified nano silicon dioxide, polyvinyl alcohol and deionized water; the cleaning towel cloth provided by the invention not only has relatively good water absorption performance, but also has excellent wear resistance, breaking strength and antibacterial performance, and also keeps good biodegradability at the same time.

Method for producing of a sound-absorbing panel (F), comprising a step of preparing a predetermined amount of cellulose fibres and a step of immersing the cellulose fibres in a first water basin (100) to form a cellulose pulp (P1). The method then comprises a step of preparing a predetermined amount of textile fibres (V) and a step of mixing, in water, the cellulose pulp (P1) with the textile fibres (V) to obtain a final pulp (P3) and a step of depositing the final pulp (P3) on a forming mould (300). The method then comprises a step of pressing at least the final pulp (P3) in order to cause an at least partial removal of the water contained in the final pulp (P3) making a fibre mat (T) and a step of drying the fibre mat (T) so as to cause evaporation of the water remained in the fibre mat (T) making a sound-absorbing panel (F).

The invention discloses a regenerated cellulose industrial filament spinning solution, a preparation method thereof and a preparation method of regenerated cellulose industrial filaments. The preparation method of regenerated cellulose industrial filament spinning comprises the following steps: carrying out alkalization treatment on an ionic liquid aqueous solution; preparing cellulose pulp; premixing the alkalized solution and cellulose pulp; preparing a spinning solution; preparing cellulose industrial filaments from the test lines; under pushing of nitrogen and a booster pump, the test line spinning solution is extruded through a filter and a spinning assembly in sequence, and regenerated cellulose hydrogel filaments are obtained through side blowing cooling and coagulating bath forming; and drawing, washing, drying and rolling the gel to obtain a finished product. According to the regenerated cellulose industrial filament spinning stock solution, the preparation method thereof and the preparation method of the regenerated cellulose industrial filament, high-molecular-weight cellulose pulp can be uniformly dissolved with high quality; the problems of cellulose degradation and high energy consumption caused by temperature rise and dissolution time prolonging in the traditional process are avoided.

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.

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 provides a LiCl / cellulose nanofiber composite membrane, a preparation method thereof and an ionic conductive humidity sensor, and belongs to the technical field of biomass nanomaterials. According to the method, cellulose pulp is used as a raw material, cellulose is dissolved in an N, N-dimethylacetamide (DMAc) / lithium chloride (LiCl) solvent system, DMAc is volatilized into air in the electrostatic spinning process, and LiCl is reserved in cellulose nanofibers. In this way, LiCl / cellulose nanofiber films with different LiCl contents can be prepared. The prepared humidity sensor has the advantages of higher sensitivity, wider detection range and short response / recovery time, and can be used in the fields of human respiration monitoring, non-contact humidity testing and the like. The invention provides a new thought for constructing a novel cellulose-based humidity sensor.

A method of manufacturing an article at least partially made of cellulose fibers comprises inserting a cellulose pulp comprising cellulose fibers and water into a mixing cavity; applying a high shear mixing action to the cellulose pulp using a high-shear mixer, such that a foam blend comprising cellulose fibers, water and air bubbles is created; inserting the foam blend into a mold cavity; and molding the article by heating the foam blend contained within the mold cavity.

This invention discloses a heterolayer-coupled cellulose-based composite membrane with impact resistance and fatigue resistance, and its preparation method. The membrane comprises: a rigid support layer composed of cellulose pulp, providing overall structural support and dimensional stability; and a flexible crosslinked layer located on the surface of the rigid support layer, composed of gelatin treated with a DES solvent system and crosslinked with glutaraldehyde, used to absorb impact energy and disperse stress. The rigid support layer and the flexible crosslinked layer form a heterolayer-coupled structure. By adjusting the modulus difference between the two layers, the bending stability and durability of the composite membrane under repeated loading and dynamic impact conditions are improved. The bilayer cellulose-based composite membrane of this invention exhibits excellent impact resistance, good fatigue resistance, and structural stability under dynamic impact and repeated bending conditions.

The invention relates to the technical field of papermaking, in particular to a lignified cellulose pulp forming device based on solid-liquid separation. The paper pulp conveying device comprises a conveying belt, the conveying belt is used for conveying paper pulp, protection plates are installed on the two sides of the conveying belt, limiting rods are fixedly installed on the side faces, close to the conveying belt, of the protection plates, a grinding roller is arranged at the top of the conveying belt, an extrusion roller is installed in the conveying belt, and the extrusion roller is installed below the grinding roller. The extrusion roller and the rolling roller are used for rolling paper pulp conveyed by the conveying belt, a driving assembly is installed on one side of the rolling roller and one side of the extrusion roller, the driving assembly is used for driving the rolling roller and the extrusion roller to rotate, a leveling plate is arranged on the side, close to the conveying belt, of the protection plate, and the leveling plate is arranged above the conveying belt. Paper pulp is conveyed on the conveying belt, and the height is leveled through the leveling plate, so that the paper pulp is conveniently and quickly rolled by the rolling roller and the extrusion roller for solid-liquid separation.

The application discloses a kind of green hydrophobic light-weight bio-based composite material of wood structure imitation and preparation method thereof, comprising the following steps: plant fiber is treated by low-alkali cooking pretreatment, standby;Starch is mixed with water, then 75-95 ℃ is added with ultrasonic vibration stirring 1-2h, then adding mesophilic alpha amylase is carried out enzymolysis, after enzymolysis is completed, oxidation treatment is carried out, then urea is added to starch, stirring reaction 1-2h, finally foaming agent is added, uniformly stirred, and the foaming hot melt modified starch is prepared;Wood pulp fiber, lignin, pretreated plant fiber and foaming hot melt modified starch are mixed according to proportion, and mixed slurry is obtained;The mixed slurry is injected in injection molding machine, and the intermediate bubble layer is prepared;A layer of waterproof film containing lignin nanocellulose slurry and polylactic acid mixed solution is sprayed on the surface of the intermediate bubble layer, and the dense waterproof layer is prepared, that is, obtained.

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.

The present disclosure is directed to nonwoven webs particularly well suited as wiping products that can be constructed without containing synthetic polymer fibers. In one aspect, the webs are made from a blend of cellulose pulp fibers and regenerated cellulose fibers. The nonwoven webs can be formed in a foam forming process in combination with one or more hydroentangling steps.

The application relates to the papermaking technical field, and discloses a reusable ultrahigh-purity paper and a preparation method thereof.A preparation method of a reusable ultrahigh-purity paper comprises the following steps: taking high-purity cellulose pulp plates, dispersing the high-purity cellulose pulp plates in deionized water, and then performing a deconstruction treatment to prepare paper pulp; performing ultrasonic treatment on the paper pulp in an acid medium, and then performing ultrasonic treatment on the paper pulp in ethanol to prepare purified paper pulp; washing the purified paper pulp with deionized water; obtaining original paper through self-assembly forming and drying treatment of the washed paper pulp; coating resin on the surface of the original paper; performing hot-pressing treatment and corona treatment on the original paper coated with the resin, and then performing high-temperature treatment and packaging to obtain the reusable ultrahigh-purity paper.The preparation method is simple in operation, high in production efficiency, and meets the environmental protection requirements; the prepared ultrahigh-purity paper is high in purity, low in impurity content, and can meet the demand of sampling paper.

The present invention relates to a container for use with a machine for preparing beverages and / or foodstuffs or precursors thereof, the container comprising: a storage portion for containing a precursor material; a closing member for closing the storage portion; and an annular flange-like rim made of a cellulose pulp-based material, the flange-like rim comprising: an annular force ring and at least two different additional portions, i.e., a first portion (61) connected to the annular force ring (63); and a second portion (62) extending from the storage portion (58), on which a closure membrane (56) is sealed, said second portion (62) connecting the storage portion (58) and the closure membrane (56). The invention also relates to a set of different containers as well as a container system and a system comprising a container and a beverage preparation machine.

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.

Wipers are disclosed formed from two, three, or more fibrous sheets. The fibrous sheets or plies are attached together by embossing a pattern into opposite sides of the product such that at least some of the embossments on one side align with at least some of the embossments on the opposite side. The resulting wiper includes outer layers primarily made from polymer synthetic fibers and a middle layer comprised primarily of cellulose fibers, such as cellulose pulp fibers. The wipers can be formed without any thermal bonding or ultrasonic bonding and can be formed without containing any polyester fibers. The wipers have demonstrated excellent oil absorbency.

The present application belongs to the field of separation of agroforestry biomass components, and provides a method for subcritical hydrolysis and alkaline DES treatment of castor straw fiber to hydrolyze associated oligomeric xylose and micro-nano lignin. The subcritical hydrolysis method is used to treat castor straw raw materials to obtain a large amount of oligomeric xylose, a small amount of micro-nano low molecular weight lignin and a hydrolysis residue rich in cellulose and lignin; then the hydrolysis residue is treated with alkaline deep eutectic solvent (DES) to obtain a slurry rich in cellulose and micro-nano high aryl ether bond lignin. Finally, the slurry rich in cellulose is enzymatically hydrolyzed by biotechnology to obtain high-yield glucose products. The present application integrates subcritical hydrolysis reaction and alkaline DES treatment technology, and can obtain various high-value-added products of castor straw biomass under mild reaction conditions, thereby providing technical support for the value-added of castor industry and the utilization of castor straw resources.

The invention aims to provide a preparation method and application of a nano-zinc oxide cellulose-based composite hydrogel film with antibacterial activity, and belongs to the field of food preservation. Comprising the following steps: preparing a sodium hydroxide-urea-water composite solvent system, pre-cooling to-12 DEG C, adding cellulose, stirring for 20 minutes to obtain cellulose slurry, adding 1.1 wt% of MBA cross-linking agent into the slurry, stirring at room temperature for 1.8 hours, respectively adding nano-zinc oxide powder into the slurry, stirring at room temperature for 1 hour until the materials are uniformly mixed, centrifuging at 1500 rpm for 10 minutes to remove suspended bubbles, and drying to obtain the nano-zinc oxide cellulose. And injecting the centrifugate into a flat glass plate mold, standing to complete gelation and film formation, after demolding, soaking in a weak acid solution and deionized water to be neutral, immersing the obtained gel into 10% w / v glycerol for solvent replacement, after 6 hours, cleaning the glycerol on the surface by using distilled water, and drying at 45 DEG C for 8 hours to prepare the nano-zinc oxide composite cellulose film. The strawberry fresh-keeping film is used for strawberry fresh-keeping, can effectively delay strawberry weightlessness, rotting and flavor substance loss, and has a fresh-keeping effect obviously better than that of a traditional PE film and non-packaging treatment.

The invention discloses a synergistic preparation method and application of carboxylated cellulose nanocrystals and regenerated cellulose, and belongs to the technical field of cellulose nanomaterial preparation. The synergistic preparation method of the carboxylated cellulose nanocrystal and the regenerated cellulose comprises the following steps: carrying out dipping treatment on a cellulose raw material in a Lewis acid solution, then carrying out solid-liquid separation, and collecting a solid-phase component to obtain cellulose slurry; dispersing the cellulose slurry in a polycarboxylic acid solution, reacting, and then filtering and collecting a solid product; treating the solid product by a method I or a method II; the method I comprises the following steps: carrying out separation treatment on the solid product to obtain carboxylated cellulose nanocrystals and regenerated cellulose; and the method II comprises the following steps: washing the solid product, and then carrying out suction filtration to obtain the holocellulose composite membrane.

The invention relates to the field of cellulose paper pulp materials, in particular to an environment-friendly corrugated carton material and a preparation method thereof. The environment-friendly corrugated carton material structurally comprises a surface layer located on the surface, a core layer located in the middle and a bottom layer serving as a lower base. The surface layer is prepared from surface layer plant cellulose pulp, a polymerization composition, a function enhancer, an adhesive, a wet strength agent, a waterproof agent, water and the like. The environment-friendly corrugated carton material provided by the invention not only can keep excellent mechanical properties, but also can balance the performance contradiction of the existing materials, so that the comprehensive performance of the materials is ensured, and the application quality and the application field of the environment-friendly corrugated carton material are improved.

A process for preparing paper pulp, comprising the following steps: - mixing (E10) a mass percentage of a fibrous by-product (10) with a complementary mass percentage of cellulose pulp (20), wherein the fibrous by-product (10) comprises at least one of the following: coffee husks obtained from roasting coffee beans, the coffee husks having a mass percentage of water-soluble compounds greater than 15% and a mass water content less than 20%, and textile dust having a length of less than 5 mm; and - refining (E20) the mixture to obtain the paper pulp. Figure for the abstract: Fig. 1

The invention relates to the technical field of functional paper-based materials, in particular to a paper-based antistatic diaphragm and a preparation method thereof. The method comprises the following steps: 1) carrying out enzymolysis modification on coniferous wood pulp to prepare cellulose pulp; (2) carrying out in-situ polymerization-wet-process papermaking forming on the cellulose paper pulp to obtain a paper base material; and 3) coating the single surface of the paper base material with the carbon-based slurry, and calendering to obtain the paper-based antistatic diaphragm. The diaphragm has good anti-static performance and mechanical performance, can be effectively used for packaging products with anti-static requirements such as drugs, electronic components and precision components, and has potential possibility of being used as a special electrochemical system diaphragm due to higher ionic conductivity generated by synergy on the basis.

This invention discloses a method for preparing cool-feeling cellulose fibers for nonwoven fabrics, comprising the following steps: (1) weighing a whitening agent and adding it to soft water, then adding a dispersant and grinding and dispersing it thoroughly, and filtering it to obtain a whitening dispersion; (2) preparing a cellulose spinning solution using cellulose pulp as raw material, adding the whitening dispersion to the spinning solution to obtain a blended spinning solution; (3) spinning the blended spinning solution in a low-temperature, low-concentration coagulation bath, and obtaining a shaped filament bundle after stretching, and then cutting it into short fibers; (4) subjecting the short fibers to high-temperature cotton web laying, acid washing, water washing, desulfurization, bleaching, swelling mercerizing, cool-feel finishing, oiling, and drying steps to obtain the cool-feeling cellulose fibers for nonwoven fabrics. The cool-feeling cellulose fibers prepared by the method of this invention have high whiteness, low residual sulfur content, low water-soluble matter, and long-lasting cool-feeling performance, which can fully meet the special requirements of nonwoven nonwoven fabric fields such as medical and health care.

A disposable absorbent article having a topsheet, a backsheet, and an absorbent core structure disposed therebetween. The absorbent core structure includes an upper nonwoven layer comprising polymer fibers and having a basis weight of from about 30 to about 85 gsm; a lower nonwoven layer comprising polymer fibers; and an inner core layer disposed between the upper and lower nonwoven layers. The inner core layer comprises a mixture of cellulose pulp and superabsorbent particles. The cellulosic pulp comprises from about 25% to about 70% of a short cellulosic fiber, by weight of the cellulose pulp, wherein the short cellulosic fiber has an average fiber length of less than about 2 mm. The absorbent core structure has an average density of between about 0.045g / cm3 and about 0.15g / cm3. At least a portion of the inner core layer is contained within the nonwoven layers by sealing a portion of a first and second side region of the upper and lower nonwoven layers.

The application discloses a chrysochlamys zollingeri extract functionalized viscose fiber and a preparation method and application thereof, and belongs to the technical field of functional fiber material preparation.The chrysochlamys zollingeri extract functionalized viscose fiber is formed by wet spinning process of a viscose original solution containing microcapsules, and the viscose original solution containing microcapsules is prepared by mixing a viscose original solution and chrysochlamys zollingeri extract / porous starch composite microcapsules, wherein the viscose original solution is prepared by impregnating cellulose pulp with a sodium hydroxide aqueous solution, carbon disulfide yellowing, and then dissolving and aging in a sodium hydroxide aqueous solution.The chrysochlamys zollingeri extract functionalized viscose fiber is prepared by microcapsule embedding combined with a mild spinning process, so that active ingredients of the chrysochlamys zollingeri extract are maximally retained, long-acting, stable and slow release and anti-inflammatory and soothing effects are achieved, the chrysochlamys zollingeri extract functionalized viscose fiber can be further processed into a functional fabric through a water jet process, and is suitable for high-end sanitary material fields such as infant paper diapers.