81 results about "Cellulose Powders" patented technology

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 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 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 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 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 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 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 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.

Disclosed are fuel additives and methods for making and using the same. A fuel additive can ethyl cellulose. A mass of ethyl cellulose in powder form can be mixed with or into a volume of a petrochemical, such as gasoline, in liquid form. The ethyl cellulose powder may at least partially dissolve in the liquid petrochemical. Heat may be applied to improve dissolution of the ethyl cellulose in the liquid petrochemical. The ethyl cellulose / gasoline fuel mixture produced therefrom can be combusted in a combustion engine, such as a small combustion engine. Combustion testing shows that the ethyl cellulose / gasoline fuel mixture exhibits greater than about 150% increase in fuel efficiency relative to gasoline alone. Other additives and stabilizers can be added to stabilize the mixture.

The invention belongs to the technical field of secondary batteries, and particularly relates to a preparation method of a biomass-based sodium-ion battery hard carbon negative electrode material, which comprises the following steps: carrying out ball-milling mixing treatment on biomass and cellulose powder, heating, stirring and modifying the mixture in a maleic anhydride aqueous solution, so that the biomass and cellulose are fully crosslinked, and drying to obtain the biomass-based sodium-ion battery hard carbon negative electrode material. And carbonizing the modified biomass at high temperature to obtain the biomass-based hard carbon material. The biomass and cellulose which are low in cost and wide in source are subjected to crosslinking treatment in the maleic anhydride solution, the cellulose content in the biomass is increased, the pyrolysis behavior of the biomass is optimized, and the biomass-based hard carbon material large in interlayer spacing and rich in closed pore structure is obtained. When the prepared hard carbon material is used as a sodium ion battery negative electrode, high sodium storage capacity and first coulombic efficiency are shown.

The application discloses a kind of aerogel of visualizing adsorbing peculiar smell and preparation method and application, steps: 1) cellulose powder is dissolved in acid solution, heated stirring, obtain cellulose solution;2) cellulose solution is centrifuged, washed with water, freeze-drying and obtain acid-modified cellulose powder;3) cellulose powder and organic amine are dissolved respectively after mixing and obtain hydrogel precursor solution;4) crosslinking agent is added to hydrogel front solution, adjust the pH of solution to neutral, room temperature stationary 2 h, obtain hydrogel;5) after hydrogel washing, immerse in copper salt solution and obtain copper ion doped hydrogel, freeze-drying and obtain the aerogel of adsorbing peculiar smell.The preparation method of the application is prepared aerogel with three-dimensional porous structure and larger specific surface area and porosity, can be adsorbed by physical adsorption and chemical complexation peculiar smell substance, and adsorption range is wide, can adsorb a variety of different types of peculiar smell molecule, and color change occurs after adsorbing acid-alkali peculiar smell.

The invention relates to the technical field of plastic plate preparation, in particular to a preparation method of a negative ion plastic plate. The invention discloses a preparation method of a negative ion plastic plate, which comprises the following steps: pretreating reinforced polypropylene to obtain fine particles, preparing silane coated functional mineral powder, carrying out surface modification, and forming a network-mineral powder composite dispersed phase with plasma treated composite cellulose powder; mixing the dispersed phase with pretreated polypropylene fine particles, composite cellulose aerogel particles and other raw materials according to a specific mass ratio, adding an adhesive and a lubricant, stirring, melting and granulating to obtain negative ion plastic master batch; and the master batch is subjected to preheating, casting, gradient cooling, trimming and curing treatment, and finally the negative ion plastic plate is prepared. By optimizing the raw material ratio and process parameters, the dispersity of functional components and the stability of the material are improved, it is ensured that the product continuously releases negative ions, the process is controllable, and industrial production is easy.

The invention relates to the technical field of demulsifiers, in particular to a green and environment-friendly polyether demulsifier and a preparation method thereof, and the green and environment-friendly polyether demulsifier is prepared from the following raw materials in parts by weight: 5-15 parts of a biological initiator, 60-80 parts of epoxypropane, 20-40 parts of ethylene oxide, 0.3-0.8 part of a catalyst and 100-150 parts of deionized water. Hydrophobized chitosan oligosaccharide in the used biological initiator can rapidly destroy an oil-water interfacial film, cellulose powder promotes droplet coalescence, the hydrophobic chitosan oligosaccharide and the cellulose powder have a synergistic effect, the demulsifier has the excellent performance of being high in demulsification speed and dehydration rate, meanwhile, the raw materials are derived from renewable biomass, and the environment-friendly effect is achieved. A supercritical carbon dioxide fluid technology and enzymatic degradation are adopted in the preparation process, and the product is low in environmental toxicity and good in biodegradability.

The present invention provides a cellulose powder having a loose bulk density of less than 0.160 g / cm3, an average particle diameter of 90 [mu] m or more and 250 [mu] m or less, and a flow velocity index of 1.40 or less; and a molded article containing one or more active components and the cellulose powder.

The invention belongs to the technical field of fruit and vegetable cleaning agents, and relates to a food-grade fruit and vegetable cleaning agent as well as a preparation method and a use method thereof, and the food-grade fruit and vegetable cleaning agent comprises nano cellulose powder, starch, calcium hydroxide and sucrose fatty acid ester. According to the fruit and vegetable cleaning agent, efficient and safe fruit and vegetable cleaning is achieved through the multi-component synergistic effect of the nanocellulose, the starch, the calcium hydroxide and the surfactant, on the basis of ensuring food-grade safety, the comprehensive removal efficiency of complex pollutants is remarkably improved, and no harmful residues exist after cleaning.

A method for producing a leather-like layered composite material (26), comprising the following steps: 1.1 Addition and dissolution of powdered chitosan (4) in dilute acid (5') to produce a solution (25), 1.2 Comminution and mixing of bacterial nanocellulose (7) with water (8) to produce a mixture (10, 10'), 1.3 Stirring of the solution (25) and the mixture (10, 10') to produce a polyelectrolyte complex (11), 1.4 Application of a first portion of the polyelectrolyte complex (11) to a carrier plate (13), 1.5 Application of a nonwoven fabric (15) to the previously applied polyelectrolyte complex (11), 1.6 Addition and stirring of natural fibers (17) into a second portion of the polyelectrolyte complex (11) and stirring to produce a mixture (16, 16') 1.7 Application of the mixture (16, 16') to the upper side of the fleece (15) 1.8 Drying process and 1.9 Removal of the finished composite material (26)

The utility model relates to an iron remover for a cellulose crushing system, which comprises a feed pipe, two iron removal pipes and a discharge pipe which are sequentially communicated from top to bottom, the iron removal pipes are obliquely arranged, magnets are arranged on the inner walls of the upper sides of the iron removal pipes, the two iron removal pipes are connected up and down and are opposite in inclination direction, a cover plate is hinged outside the upper sides of the iron removal pipes, and the cover plate is connected with the discharge pipe. According to the cellulose deironing device, secondary deironing is carried out on cellulose through the two deironing pipes with the opposite inclination directions, and the deironing effect can be effectively improved through multiple times of rolling in the falling process of the cellulose; and scrap iron on the magnet can be conveniently cleaned by opening the cover plate, the structure is simple, and use is convenient.

The invention discloses preparation of a fluorescent silver nanocluster composite material and application of the fluorescent silver nanocluster composite material in fluorescent ink. The preparation method comprises the following steps: by taking renewable resource cellulose powder as a raw material, carrying out acid hydrolysis and formylation treatment to prepare formyl modified cellulose nanocrystals; and uniformly mixing a silver source and a protective ligand, adding the aldehyde group modified cellulose nanocrystal as a stabilizer and a reducing agent, and preparing the aldehyde group modified cellulose nanocrystal-based fluorescent silver nanocluster composite material in an ultraviolet radiation manner. The composite material has a good photoluminescence characteristic, can emit orange red fluorescence under the irradiation of 365nm ultraviolet light, has a remarkable anti-counterfeiting effect, and can be used for preparing fluorescent ink, anti-counterfeiting printing, decorative printing and dyeing and the like.

This invention provides a photosensitizer, its preparation method and application, and a method and application for preparing antibacterial fibers. The method for preparing antibacterial fibers includes the following steps: adding a photosensitizer and cellulose powder to a spinning solution, and then preparing antibacterial fibers through wet spinning. The method for preparing antibacterial fibers of this invention, by adding a photosensitizer to the wet spinning solution, enables it to generate reactive oxygen species (ROS) under light irradiation, thereby destroying bacteria around the spun fibers and achieving a good antibacterial effect. Textile antibacterial performance tests on the spun fibers show that the inhibition rate against Escherichia coli and Staphylococcus aureus can reach 100%.

Provided is a method for producing L-HPC having high flowability and good bondability. A method for producing hydroxypropyl cellulose having a low degree of substitution, the method comprising at least: a step for obtaining alkali cellulose by bringing powdered pulp into contact with an alkali metal hydroxide solution; a step for obtaining a reaction product by reacting the alkali cellulose with propylene oxide; a dissolution step for mixing the reaction product with water without adding an acid; a step for neutralizing an alkali metal hydroxide contained in the reaction product; a step in which a reaction product after the neutralization step is washed, dehydrated, and dried to obtain a dried hydroxypropyl cellulose having a low degree of substitution; and a step for pulverizing the dried hydroxypropyl cellulose having a low degree of substitution.

An extrusion molding material includes: a base containing a cellulosic powder subjected to chemical treatment and a resin; and a surface layer containing a cellulosic powder subjected to chemical treatment and a resin and covering the base, a content rate of the cellulosic powder in the surface layer being lower than a content rate of the cellulosic powder in the base.

The invention provides an aerosol-forming substrate. An aerosol-forming substrate (1020) for use in an aerosol-generating system (2000) is provided. The aerosol-forming substrate (1020) comprises: one or more aerosol-forming agents; hydroxypropyl methyl cellulose; and one or more cellulose-based fortifiers. The aerosol-forming substrate (1020) has an aerosol former content of greater than 30% by weight. The one or more cellulose-based fortifiers include a cellulose powder. The aerosol-forming substrate (1020) has a cellulose powder content of between about 0.5 wt% and about 50 wt%.

The present disclosure relates generally to cellulose powders having improved dispersibility, feel, and stability in which the powders are surface modified with at least a modified dextrin and / or a modified amino acid to render the cellulose powder hydrophobic. The powders may be used in cosmetic compositions such as a powder foundation, liquid foundation, point makeup, lip, mascara, eyeliner, skin care products which are skin cream, hair care products which are shampoo, conditioner, treatment and hair styling products, hair color products, cleansing products which are a body soap, hand soap and facial cleanser.