141 results about "Cellulose Powders" patented technology

The invention relates to the technical field of building coatings, in particular to an aerogel-based anti-condensation coating. The aerogel-based anti-condensation coating is prepared from the following components in percentage by weight: 30 percent to 45 percent of deionized water, 0.1 percent to 1.0 percent of cellulose, 5 percent to 10 percent of powder, 25 percent to 35 percent of emulsion, 0.5 percent to 3.0 percent of aerogel, 15 percent to 30 percent of hollow glass beads and 1 percent to 2 percent of auxiliaries. By introducing the aerogel and the hollow glass beads, especially the hollow glass beads subjected to surface modification by fluorinated acrylate and poly (N-isopropylacrylamide), the anti-condensation performance of the coating is remarkably improved, and the characteristics of high specific surface area and low density of the aerogel are remarkably improved; according to the present invention, the coating material can maintain the excellent anti-condensation effect in the wide temperature range (including the rapid change of the day and night temperature difference and the extremely low cold fluid temperature environment) under the combined action of the hollow structure of the hollow glass bead and the low wettability after the modification, such that the initial dew point time is substantially prolonged, and the condensation amount is strictly controlled to the low level.

The invention discloses a cellulose-based in-situ growth MOF composite aerogel preparation method, which comprises: mixing cellulose powder and dimethylimidazole, adding into deionized water, gradually adding cobalt nitrate and zinc chloride, uniformly stirring, carrying out a heating reaction, adding polyethyleneimine, uniformly stirring, adding a cross-linking agent, carrying out cross-linking, washing, and drying to obtain the cellulose-based in-situ growth MOF composite aerogel. The composite hydrogel is obtained; and finally, sealing, heating and baking the composite hydrogel, washing and drying to obtain the composite aerogel. According to the method, the MOF is synthesized on the cellulose in situ under the low-temperature water phase condition, the composite aerogel containing the MOF material is obtained, the MOF material synthesized on the cellulose in situ has good porosity and particle size and uniformly covers the cellulose, loss of active components is avoided, the problem that the MOF material is prone to agglomeration is solved, and the preparation method is suitable for industrial production. Meanwhile, the adsorption performance is also effectively improved, the adsorbent has good affinity with water, and the surface can be promoted to adsorb three metal ions of vanadium, molybdenum and nickel at the same time.

The invention discloses a method for catalytically oxidizing lignin to depolymerize into an aviation oil intermediate by using a cellulose carbon aerogel supported copper nano-catalyst. Comprising the following steps: (1) dissolving cellulose powder into a mixed alkali solution of NaOH and urea, and stirring at low temperature to obtain a clear and transparent cellulose solution; and washing to be neutral to obtain well dispersed cellulose suspension. And (2) carrying out suction filtration molding, and freeze-drying for a period of time to obtain the cellulose aerogel. And (3) immersing in an ethanol solution of copper nitrate for ultrasonic treatment, and drying in a vacuum drying oven. And (4) carrying out high-temperature calcination in an N2 atmosphere to obtain a catalyst which is marked as Cu / CA. And (5) the catalyst can efficiently catalyze a Fenton-like reaction to oxidize a dimer model compound of lignin in acidic, neutral and alkaline environments to obtain products including benzoic acid, acetophenone, benzyl alcohol, phenol and the like, the required hydrogen peroxide concentration is low, and the catalyst has the advantages of simple process, high catalytic activity, low cost and the like, can be used for effectively degrading lignin to prepare aviation oil intermediates, and has wide application prospects. And repeated cyclic utilization is realized.

The invention provides a slow-release antibacterial enhanced composite film for fruit and vegetable preservation and a preparation method thereof, and the preparation method comprises the following steps: performing sulfonation modification treatment on nano cellulose powder to obtain sulfonated nano cellulose; carrying out quaternization modification treatment on the sulfonated nano-crystalline cellulose to obtain quaternary ammonium sulfonated nano-crystalline cellulose; adding gelatin and sodium carboxymethyl cellulose into deionized water to obtain a wall material solution, and adding curcumin into the wall material solution to obtain a prepolymer solution; stirring and emulsifying the prepolymer solution at a high speed to obtain a prepolymer suspension; adding a chitosan solution into the prepolymer suspension to obtain a microcapsule solution, adding tannic acid into the microcapsule solution to obtain a microcapsule suspension, and performing spray drying to obtain double-layer microcapsule powder; the preparation method comprises the following steps: uniformly mixing polylactic acid, quaternary ammonium sulfonated nanocellulose, the double-layer microcapsule powder, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially carrying out melt extrusion, cooling, pelletizing and film blowing.

The invention discloses a preparation method of a bio-based cellulose nano colorant, which comprises the following steps: (1) cutting absorbent cotton into pieces, and grinding to obtain cellulose powder; (2) mixing the cellulose powder with sulfuric acid, stirring and hydrolyzing under a water bath condition, then adding deionized water into a reaction solution, centrifuging, dispersing and dialyzing to prepare a pure fiber suspension; (3) performing high-pressure homogenization on the pure fiber suspension to obtain nano cellulose; and (4) preparing nanocellulose into a nanocellulose suspension, then adding the indigo dye dispersion liquid and a surfactant, carrying out ultrasonic treatment, and cooling to room temperature to prepare the bio-based cellulose nano colorant. The insoluble dye indigo blue is dispersed and then added into the nanocellulose to prepare the insoluble dye type nanocellulose coloring agent, so that the coloring agent has high color depth and good stability.

The invention discloses an element liquid fertilizer for promoting nutrient absorption and a preparation method thereof, and belongs to the technical field of fertilizers. Comprising monoammonium phosphate; urea; potassium nitrate; cake fertilizer leach liquor; trace elements; a wetting agent; a stabilizer; a biological agent; an adsorbent; deionized water; the preparation method of the adsorbent comprises the following steps: A1, taking loofah sponge powder, and removing lignin and hemicellulose to obtain loofah sponge cellulose powder; a2, mixing the loofah sponge cellulose powder, deionized water, a chitosan solution and plant ash, mechanically pulping uniformly, performing vacuum freeze-drying treatment to form holes, crushing and grinding to obtain the adsorbent, root development can be promoted, elongation and thickening of stems are promoted, the photosynthetic rate of plants is increased, and the crop yield is increased.

The invention provides a preparation method of coaxial aerogel fiber and temperature self-adaptive protective aerogel fabric, which comprises the following steps: weighing nano-crystalline cellulose powder and dispersing in deionized water to obtain nano-crystalline cellulose dispersion suspension, weighing phase change microcapsules and dispersing in the nano-crystalline cellulose dispersion suspension to obtain phase change microcapsules; a core layer spinning mixed solution is obtained; carrying out wet spinning on the nano aramid fiber spinning stock solution and the core layer spinning mixed solution through a coaxial spinning needle, and fully solidifying in a coagulating bath to obtain coaxial gel fibers; the coaxial gel fibers are subjected to multiple times of solvent replacement treatment, then washed to be neutral and finally subjected to freeze drying treatment, and the coaxial aerogel fibers are obtained. According to the fabric, the phase change microcapsules are perfectly wrapped in the aerogel fibers, and the fabric has good heat insulation performance, good mechanical performance, excellent low-temperature and high-temperature responsiveness and a good protection effect in an extreme environment.

The invention provides a bacteriostatic high-barrier nano-cellulose-based composite film for fruit and vegetable preservation and a preparation method thereof, and the preparation method comprises the following steps: carrying out sulfonation modification treatment on nano-cellulose powder by using 1, 3-propane sultone to obtain sulfonated nano-cellulose; then, octadecyl trimethyl ammonium chloride is adopted for conducting quaternization modification treatment on the sulfonated nano-crystalline cellulose, and quaternary ammonium sulfonated nano-crystalline cellulose is obtained; the preparation method comprises the following steps: dispersing silver-loaded chitosan in deionized water to obtain a silver-loaded chitosan solution, adding montmorillonite into the silver-loaded chitosan solution, mixing, stirring and heating, and then carrying out suction filtration, washing and drying to obtain intercalated montmorillonite; the preparation method comprises the following steps: uniformly mixing polylactic acid, quaternary ammonium sulfonated nano-cellulose, intercalated montmorillonite, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially carrying out melt extrusion, cooling, pelletizing and film blowing on the mixed material to obtain the antibacterial high-barrier nano-cellulose-based composite film.

The invention belongs to the technical field of photo-thermal catalysis and biomass resource utilization, and particularly relates to a sulfonated biochar PC-SO3H-1 catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: performing NaOH aqueous solution ultrasonic pretreatment, washing, drying and grinding on cellulose to obtain pretreated cellulose powder, uniformly dispersing the pretreated cellulose powder, p-toluenesulfonic acid and citric acid in deionized water, fully stirring at room temperature, then transferring the solution into a high-pressure reaction kettle, reacting, cooling, washing and drying to obtain the cellulose-p-toluenesulfonic acid / citric acid composite material. And grinding to obtain the PC-SO3H-1 photo-thermal catalytic material. The catalyst disclosed by the invention can be used for performing efficient photothermal conversion, so that the generation of biodiesel can be quickly catalyzed under the condition of room temperature.

The invention relates to a super absorbent resin water-retaining agent and a preparation method thereof and a plant straw-based dust suppressant, the super absorbent resin water-retaining agent is prepared by the following steps: preparing carboxymethyl straw cellulose powder by using plant straw as a raw material, and then preparing the super absorbent resin water-retaining agent by using the carboxymethyl straw cellulose powder as a raw material through an aqueous solution polymerization method; the dust suppressant provided by the invention has the beneficial effects that after the dust suppressant provided by the invention is sprayed on the surface of dust, the dust can be agglomerated together, the evaporation of moisture in raised dust is reduced, and the raised dust is effectively inhibited; and the dust suppressant does not contain substances harmful or irritant to human bodies, all components in a formula system of the dust suppressant can be mutually fused at normal temperature, and the dust suppressant is suitable for being sprayed for dust suppression and is easy to transport and store.

The invention discloses a cellulose / graphene oxide / ZIF-67 derived nano-composite wave-absorbing material with a hierarchical porous structure and a preparation method, and relates to the technical field of preparation of wave-absorbing materials. The preparation method comprises the following steps: respectively dissolving dimethylimidazole and cobalt nitrate hexahydrate in absolute methanol, and mixing the dimethylimidazole and the cobalt nitrate hexahydrate to obtain ZIF-67 powder; the preparation method comprises the following steps: adding graphene oxide into deionized water for ultrasonic dispersion, then adding cellulose powder and ZIF-67 powder, and mixing to obtain a cellulose / graphene oxide / ZIF-67 composite material; and performing high-temperature pyrolysis treatment on the cellulose / graphene oxide / ZIF-67 composite material to obtain the cellulose / graphene oxide / ZIF-67 derived nano composite wave-absorbing material with the hierarchical porous structure. The wave-absorbing material prepared by the invention has the characteristics of thin thickness, light weight, strong absorption and wide frequency band, and effectively solves the problems of serious electromagnetic pollution, insufficient frequency band coverage of the traditional wave-absorbing material and structural design limitation.

The invention discloses a preparation method of a waste paper regenerated fiber super-hydrophobic anti-icing coating, and relates to a preparation method of an anti-icing coating, and the method comprises the following steps: preparing nano cellulose powder through recycled waste paper, modifying the nano cellulose powder through dopamine hydrochloride, p-phenylenediamine and octadecylamine to form OA-CP-F powder, and compounding the OA-CP-F powder with epoxy resin and an epoxy resin curing agent to form a spraying coating, the curing agent is an epoxy resin common curing agent. The coating with a micro-nano composite structure is formed on the surface of a base material by adopting a spraying method, the contact angle is as high as 155 degrees, the icing time can be remarkably prolonged to 358s (-20 DEG C), an ice layer on the surface of the coating is loose frost ice and is extremely easy to fall off, the icing risk of various materials can be remarkably reduced, and the coating is suitable for the fields of aerospace, electric power facilities and the like.

The invention provides porous alumina ceramic and a preparation method thereof, and relates to the technical field of ceramic materials. The invention relates to a preparation method of porous alumina ceramic. The preparation method comprises the following steps: dispersing alpha-cellulose powder in deionized water to form a cellulose suspension; stirring to fully swell the cellulose and form uniform gel, and freeze-drying to obtain a template; dissolving aluminum nitrate hexahydrate, magnesium nitrate hexahydrate and yttrium nitrate hexahydrate in absolute ethyl alcohol to obtain a precursor solution; putting gamma-Al2O3 micro powder and ammonium fluoride into a ball milling tank, adding the precursor solution and a dispersing agent, adding zirconium oxide balls and absolute ethyl alcohol into the ball milling tank, and performing ball milling to obtain ceramic slurry; dipping a template into the ceramic slurry, and performing dipping treatment under a vacuum condition to form a composite green body; and sintering to obtain the porous alumina ceramic. According to the porous aluminum oxide ceramic, the process stability is improved, and the problem that the strength is sharply reduced when the porosity is too high is solved.

The invention discloses a modified rare earth algistat as well as a preparation method and application thereof. The modified rare earth algistat is prepared by mixing a 2-hydroxypyridine nitrogen oxide rare earth derivative, 8-hydroxyquinoline lanthanum, cellulose powder and second soluble rare earth salt. The composite material can release rare earth ions in water. The ions interact with negative charges on the surface of the algae through electrostatic adsorption, so that a bridging effect is formed, and the algae are quickly gathered and finally precipitated, so that effective flocculation is realized; wherein the 8-hydroxyquinoline lanthanum and the 2-hydroxypyridine nitrogen oxide rare earth compound have remarkable antibacterial and algae-inhibiting effects.

The invention relates to a cellulose-based straw and a preparation method thereof. The cellulose-based straw comprises the following raw materials in parts by mass: 10-50 parts of cellulose powder; 10 to 50 parts of cellulose nanofiber; 1 to 50 parts of cellulose nanocrystals; 10 to 60 parts of a cellulose dissolving solution; and 1-5 parts of a cross-linking agent. The cellulose dissolving solution is used as an adhesive, and the cellulose material with proper size and proportion is used as a network reinforcement, so that the straw with the cellulose as the main body material is obtained, and the straw has the characteristics of high strength, weak water absorption, natural degradation and the like.

The invention provides a ceramic filter plate preparation process and application of a ceramic filter plate. The preparation process of the ceramic filter plate comprises the following steps: a ceramic filter tube preparation step S1: putting cellulose powder and glycerol liquid into a reaction kettle, injecting water, uniformly stirring, adding silicon nitride powder and diatomite powder, and mixing to form a ceramic material; s2, extruding the ceramic material to form a pipe body with a wave structure by adopting an extrusion process, and then drying, sintering and cooling; c1, diatomite and a dispersing agent are mixed and dispersed through ultrasonic treatment, nano-silica and water glass are added, and stirring is performed to form a coating; c2, coating the surface of the ceramic filter tube with the coating, baking to form a film layer, and calcining to improve the compactness and thermal shock resistance of the film coating; the preparation method of the ceramic filter plate comprises the following steps: adhering the tail end socket to the tail end of the ceramic filter tube, inserting the ceramic filter tube into the positioning hole of the head sheath for adhesion, curing, and sealing in the head sheath.

The invention discloses a bamboo reed graphene viscose fiber preparation method, a blended yarn and a blended yarn preparation method, and belongs to the technical field of fiber preparation. The preparation method of the bamboo reed graphene viscose fiber comprises the following steps: extracting bamboo reed cellulose from bamboo reed, carrying out ozone and chemical comprehensive treatment on the bamboo reed to obtain the bamboo reed cellulose, and crushing the bamboo reed cellulose to obtain bamboo reed cellulose powder; graphene dispersion liquid is prepared, graphene is subjected to ultrasonic dispersion treatment in a solution containing a surfactant, and the graphene dispersion liquid is obtained; preparing a spinning solution, dissolving the arundo donax cellulose powder in an alkali / urea solvent, then adding the graphene dispersion liquid into the alkali / urea solvent, and uniformly mixing to obtain the spinning solution; and carrying out wet spinning, extruding the spinning solution into a coagulating bath through spinneret orifices, and molding to obtain the viscose fiber. By adopting the bamboo reed graphene viscose fiber preparation method, the blended yarn and the blended yarn preparation method, the problem of poor performance of the bamboo reed graphene viscose fiber can be solved, and the bamboo reed graphene viscose fiber has very good heat retention property.

The present invention provides a cellulose-based porous carbon electrode material and a supercapacitor electrode prepared therefrom. The cellulose-based porous carbon electrode material is prepared by the following steps: Hydrazine hydrate, cellulose powder and nickel acetate hexahydrate are added to deionized water, ultrasonicated and uniformly mixed, and then the above mixture is transferred to the inner liner of a hydrothermal autoclave for hydrothermal reaction, filtered, washed and dried to obtain a cellulose-based carbon material; The cellulose-based carbon material is mixed with KOH, placed in a horizontal tubular furnace, and reacted under high temperature and in the presence of N2, and cooled to room temperature to obtain cellulose-based porous carbon; The cellulose-based porous carbon is stirred in an acid solution, washed to neutrality and dried to obtain the cellulose-based porous carbon electrode material. The cellulose-based porous carbon electrode material prepared by the present invention has the advantages of high specific surface area and cycle stability, as well as high specific capacitance and ideal pseudocapacitance.

The utility model discloses a microcrystalline cellulose crusher. The microcrystalline cellulose crusher comprises a crushing box, the crushing assembly is arranged at the feeding end of the crushing box; the guide hopper is arranged at the upper end in the crushing box; the grinding roller is positioned above the guide hopper; the two groups of bulges are respectively positioned on the side wall of the grinding roller and the inner wall of the guide hopper; the first driving motor is used for driving the grinding roller to rotate; the utility model relates to the technical field of microcrystalline cellulose processing, raw materials subjected to preliminary crushing enter the gap between the guide hopper and the grinding roller, the first driving motor is started to drive the grinding roller to rotate, and the grinding roller is driven to rotate to grind the microcrystalline cellulose. The protrusions on the grinding roller are matched with the protrusions on the guide hopper to coarsely grind large-particle raw materials into small-particle raw materials, the coarsely ground microcrystalline cellulose raw materials enter the grinding assembly to be finely ground, and the situation that the grinding efficiency of the microcrystalline cellulose raw materials is affected due to the fact that the large-particle raw materials need long smashing and grinding time is avoided; meanwhile, the crushing and grinding quality of the microcrystalline cellulose raw material is ensured.

The invention discloses a preparation method of a super-hydrophilic-underwater super-oleophobic oil-water separation material. The preparation method comprises the following steps: dissolving polyacrylonitrile and cellulose powder in an organic solvent, and mixing and stirring to obtain a spinning solution; standing the spinning solution, defoaming, carrying out electrostatic spinning on the defoamed spinning solution, and drying after spinning to obtain a polyacrylonitrile cellulose nano composite membrane; the preparation method comprises the following steps: preparing a chitosan cross-linking solution, dipping the polyacrylonitrile cellulose nano-composite membrane in the chitosan cross-linking solution, coating chitosan, cleaning and drying after dipping, and finally obtaining a super-hydrophilic-underwater super-oleophobic oil-water separation material, namely the polyacrylonitrile cellulose cross-linked chitosan composite membrane. The super-hydrophilic-underwater super-oleophobic oil-water separation material prepared by the invention has the advantages of long-acting stability, high flux, high separation efficiency, emulsified oil adaptability and simple and convenient process, and has relatively high flux and separation efficiency of 99% or above for various oil-water emulsions and oil-water emulsions with different concentrations.

The carboxymethyl cellulose starch ether for cleaning the photovoltaic panel is prepared by the following steps: 1) taking refined cellulose and powder starch, and uniformly mixing to obtain a mixture; 2) adding the mixture into an alcohol-water solution containing sodium hydroxide and ethylurea, and reacting under a stirring condition to obtain an alkalized mixture; and 3) adding an alcoholic solution containing chloroacetic acid, 3-oxocyclobutane-1, 1-dicarboxylic acid and 2-chloroethyl urea into the alkalized mixture, and carrying out a reaction under a stirring condition to obtain the target product, with the alcoholic solution containing chloroacetic acid, 3-oxocyclobutane-1, 1-dicarboxylic acid and 2-chloroethyl urea. Through synergic cooperation of cellulose and starch, the production cost can be reduced, the anti-dirt capability can be effectively improved, and the application range can be expanded.

The present invention relates to a cosmetic composition in the form of an oil-in-water dispersion comprising, in a physiologically acceptable medium: one or more vegetable oils consisting essentially of unsaturated fatty acids and / or unsaturated hydrocarbons, a cellulose polymer, a cellulose powder, and a hydrophilic gelling system comprising a polysaccharide gum and a carboxyvinyl polymer.

The invention belongs to the technical field of carbon materials, and particularly relates to a preparation method of a graphene oxide material taking a highly-crystallized nano cellulose thin layer with a highly-curled and folded structure as a precursor. The preparation method comprises the following steps: treating a macromolecular cellulose raw material by utilizing an acid hydrolysis method to obtain cellulose nanofibers with relatively uniform molecular weight; dissolving cellulose nanofibers to obtain a cellulose solution; the cellulose solution is dialyzed in a poor cellulose solvent, cellulose is gradually separated out, and a high-crystallinity cellulose nanometer material is obtained; the high-crystallinity cellulose nanomaterial can also be subjected to freeze drying, natural drying and stoving treatment to remove the solvent to obtain high-crystallinity nanocellulose powder; and carrying out pyrolysis carbonization treatment on the high-crystallinity nano-crystalline cellulose at 300 DEG C or above to obtain the graphene oxide material with a highly curled and folded structure. According to the method, the high-crystallinity nanocellulose is directly converted into the graphene oxide in one step through low-temperature carbonization, and the method has the characteristics of high efficiency and low energy consumption.

The present invention discloses a cellulose composite PVC material, its preparation method and applications, belonging to the technical field of polymer materials. By introducing partial cellulose powder into the components and compounding specific stabilizers and fillers, the cellulose composite PVC material of the present invention can not only achieve high thermal stability, have a high decomposition temperature and a low odor level, but also have a high surface resistance, making it suitable for the electrical appliance industry.

The present disclosure provides methods of preparing cellulosic superabsorbent polymer (SAP) using cellulose powder.

The invention discloses a preparation method of cellulose hydrogel, which comprises the following steps: (1) modifying cellulose powder by ionizing radiation to obtain first modified cellulose; (2) modifying the first modified cellulose again by using a hydrosulphite solution, and separating from the hydrosulphite solution to obtain second modified cellulose; and (3) mixing the second modified cellulose with water, and standing to form gel, so as to obtain the cellulose hydrogel. According to the preparation method of the cellulose hydrogel, the cellulose is modified by utilizing ionizing radiation, then the cellulose is modified again by utilizing the hydrosulfite solution, and through two times of modification, the dispersity of the cellulose in water can be remarkably improved, a self-crosslinking point is formed, and the cellulose hydrogel can be easily prepared.

The invention provides a preparation method of a thermosensitive phase change material. The method comprises the following steps: preparing oxidized cellulose powder, oxidized nanocellulose redispersion liquid, oxidized nanocellulose redispersion dissolving liquid, spherical oxidized-regenerated nanocellulose and the thermosensitive phase change material. The invention further provides application, the spherical oxidized-regenerated nanocellulose is applied to packaging of a phase-change material, and the thermosensitive phase-change material can be applied to temperature change indication and adjustment. The problem that the oxidized cellulose dispersion liquid is difficult to store for a long time in the transportation and storage process is solved. According to the method disclosed by the invention, the fibrous oxidized nano-cellulose is dried and re-dispersed, so that the spherical oxidized-regenerated nano-cellulose which is uniform in particle size distribution, relatively small in size and good in dispersity can be prepared without loss. In addition, the thermosensitive phase change material with the spherical oxidized-regenerated nanocellulose as the shell layer is prepared on the basis, and the application of the nanocellulose is expanded.

The invention provides a diaphragm, a preparation method thereof and a secondary battery. The preparation method comprises the following steps: dipping and absorbing cellulose powder in a shear thickening fluid, then coating at least one side of a base membrane with the obtained dipping and absorbing material, and drying to obtain the diaphragm. The cellulose powder is soaked and absorbed in the shear thickening fluid, the shear thickening fluid and the cellulose are strongly combined, the distribution uniformity of the shear thickening fluid in the cellulose is improved, the shear thickening fluid has a bonding effect on cellulose molecules, and therefore the impact deformation resistance and the heat shrinkage resistance of the cellulose are improved. The diaphragm prepared by adopting the preparation method disclosed by the invention has relatively high impact resistance, puncture resistance and heat resistance, so that the damage of a pole piece can be reduced, battery thermal runaway caused by impact and puncture can be reduced, and the safety performance of a battery cell can be enhanced. In addition, the preparation process flow and the operation mode are simple and convenient, and the preparation cost is low.

Provided are a cellulose powder and a molded article using the cellulose powder, the molded article having excellent hardness and wear while maintaining good disintegrability while reducing mass variation, and being capable of obtaining a smaller molded article without changing the amount of an active ingredient such as a drug, and a molded article using the cellulose powder. The present invention provides: a cellulose powder which has a ratio Y (Cv / D50) of a water absorption rate Cv to an average particle diameter D50 of 0.12 g2 / (s [mu] m) or more, an apparent density X of 0.135 g / cm3 or less, and a molded article containing one or more active ingredients and the cellulose powder of any one of the active ingredients, and which is characterized in that: the ratio Y (Cv / D50) is 0.12 g2 / (s [mu] m) or more; the ratio Y (Cv / D50) of the water absorption rate Cv to the average particle diameter D50 of the cellulose powder and the apparent density X satisfy formula (1-1) [Y > = 1.5 X-0. 06].

This invention relates to the field of laser cladding technology, specifically to a toughened and reinforced laser cladding alloy powder and its preparation process. It solves the problem of poor hardness and toughness of the cladding layer formed by existing laser cladding alloy powders during use. This laser cladding alloy powder incorporates scandium / erbium-loaded nano-silica and tannic acid-hydroxypropyl cellulose-coated boron nitride. Loading scandium and erbium onto the nano-silica improves the wear resistance and tensile strength of the cladding layer. Coating the boron nitride surface with tannic acid-hydroxypropyl cellulose powder improves the wettability between boron nitride and the metal matrix, reducing interface defects. The synergistic effect of rare earth elements and boron nitride reduces porosity and cracks in the cladding layer. It also improves density by refining grains and strengthening interfacial bonding, further enhancing the material's wear resistance and tensile strength, ensuring service life and reliability under high temperature and high stress environments.