41 results about "Cellulose Powders" patented technology

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 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.

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 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 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 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.

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.

The application discloses a method for preparing 2,5-furan dicarboxylic acid based on waste textiles, and relates to the field of organic polymer compounds, and comprises the following steps: S1, pretreating waste textiles to obtain cellulose powder; S2, adding the cellulose powder into a buffer system, then adding a cellulase composition, and obtaining a glucose solution after reaction; S3, mixing the glucose solution with a mixed solvent, and obtaining HMF crude product through a solid-phase catalyst in a fixed bed; and S4, mixing the HMF crude product, an oxidation catalyst composition and an acid solvent, and reacting under an oxidation gas atmosphere, and obtaining 2,5-furan dicarboxylic acid through crystallization and separation after reaction. The application uses waste textiles as raw materials, has low raw material cost and is widely available, realizes high-value utilization of waste, and meets the green and sustainable development concept. The yield and purity of 2,5-furan dicarboxylic acid are significantly higher than those of a traditional hydrobromic acid process, and the corrosion of hydrobromic acid to equipment is avoided.

This invention discloses an iron-based composite solid-phase carbon source for denitrification of wastewater with a low carbon-to-nitrogen ratio and its preparation method. This invention relates to the field of wastewater treatment technology and aims to solve the problem that traditional mixed solid-phase carbon sources suffer from unstable carbon release rates under fluctuations in hydraulic retention time / hydraulic load, easily leading to a sharp drop in denitrification efficiency. The method involves co-dissolving polyvinyl alcohol and sodium alginate to form a cross-linking carrier solution; mixing zero-valent iron powder, PHBV powder, and natural cellulose powder and adding them to the carrier solution to form a homogeneous slurry; freezing the slurry and then solidifying it in an acidic cross-linking solution containing calcium ions; followed by washing and vacuum drying to obtain the iron-based composite solid-phase carbon source. The carbon source obtained by this invention has the characteristics of stable carbon release, high denitrification efficiency, and strong resistance to fluctuations in hydraulic load, making it particularly suitable for deep denitrification treatment of wastewater with a low carbon-to-nitrogen ratio.

The invention discloses an antibacterial moisture-absorbing breathable sanitary napkin and a preparation method thereof, and relates to the technical field of sanitary napkins, the preparation method comprises the following steps: mixing a chitosan microcapsule essential oil dispersion liquid, the essential oil dispersion liquid and a quercetin solution, and ultrasonically spraying the mixture on the surface of a polycaprolactone nanofiber membrane to obtain an antibacterial breathable surface layer; uniformly mixing super absorbent polymer powder and nano cellulose powder, adding a cross-linking agent, uniformly stirring, and carrying out hot press molding to obtain a gradient moisture absorption middle layer; adding a mixed solution of sodium alginate and cellulose nanocrystals into a calcium chloride solution, drying and crushing to obtain a water-locking breathable bottom layer; the antibacterial breathable surface layer, the gradient moisture absorption middle layer and the water locking breathable bottom layer are sequentially stacked from top to bottom, hot pressing and cooling are conducted, and the antibacterial moisture absorption breathable sanitary towel is obtained.

The invention belongs to the field of osmotic energy conversion, and discloses an aramid nanofiber-cellulose acetate composite film and a preparation method and application thereof.The preparation method comprises the steps that an ANFs dispersion liquid containing K + PPTA polyanions is prepared through a deprotonation method; the preparation method comprises the following steps: mixing an ANFs dispersion liquid containing K + PPTA polyanions with cellulose acetate powder, and stirring for reaction to obtain a uniform composite dispersion system; carrying out suction filtration on the uniform composite dispersion system to obtain a self-supporting wet film; carrying out hot pressing treatment on the self-supporting wet film, and cooling to obtain an aramid nanofiber-cellulose acetate composite film; the ANFs dispersion liquid containing K + PPTA polyanions is mixed with the cellulose acetate powder to construct the composite membrane with an ultra-narrow and uniform sub-nanometer ion transmission channel, hydrated ions can be effectively screened, the overlapping effect of double electron layers can effectively inhibit entering of anions, and the composite membrane is endowed with extremely high cation selectivity.

The invention discloses a method for preparing 2, 5-furandicarboxylic acid based on waste textiles, and relates to the field of organic high-molecular compounds, and the method comprises the following steps: S1, pretreating the waste textiles to obtain cellulose powder; s2, adding cellulose powder into a buffer system, then adding a cellulase composition, and reacting to obtain a glucose solution; s3, mixing the glucose solution with the mixed solvent, and passing through a solid-phase catalyst in a fixed bed to obtain an HMF crude product; and S4, mixing the HMF crude product, the oxidation catalyst composition and an acid solvent, reacting in an oxidizing gas atmosphere, and crystallizing and separating after the reaction to obtain the 2, 5-furandicarboxylic acid. The waste fabric is used as the raw material, the raw material is low in cost and wide in source, high-value utilization of waste is achieved, and the concept of green sustainable development is met. The yield and purity of the 2, 5-furandicarboxylic acid are obviously higher than those of the traditional hydrobromic acid process, and corrosion of hydrobromic acid to equipment is avoided.

A cellulose powder conveying mechanism comprises a cyclone separator, a bag type dust collector and a negative pressure fan, a feeding port of the cyclone separator is connected with a discharging port of an opener through a feeding pipeline, and a gas phase outlet of the cyclone separator is connected with a feeding port of the bag type dust collector through a pipeline. A discharge port of the cyclone separator supplies materials to the cotton bin through the cyclone feeder and a first pipeline, an exhaust cavity of the bag type dust collector is connected with a negative pressure fan, and the bottom of a dust hopper of the bag type dust collector supplies materials to the cotton bin through the spiral feeder and a second pipeline. The cellulose powder conveying device is simple in structure, convenient to operate and capable of safely conveying cellulose powder generated by the cotton slitter to a cotton bin, and the actual requirements of enterprises are met.

The invention relates to the technical field of filling machines, in particular to a dust-free cellulose powder filling device which comprises a spiral feeding unit, a weighing unit, a dust removal unit and a clamping and separating mechanism, the weighing unit is located on the upper end face of the clamping and separating mechanism and used for monitoring the mass of materials in a packaging bag in real time and controlling starting and stopping of the spiral feeding unit, and the dust removal unit is located on the lower end face of the clamping and separating mechanism. The dust removal unit is used for recycling residual powder on the top of the packaging bag, and the clamping and separating mechanism is used for hanging the packaging bag and clamping the joint of a feeding port of the packaging bag and a discharging port of the spiral feeding unit. A discharging port of the hopper is communicated with a feeding port of the first spiral feeder, a feeding port of the second spiral feeder is communicated with the first spiral feeder through the storage bin, and discharging ports of the first spiral feeder and the second spiral feeder are both communicated with the packaging bag. The distance and the diameter of spiral bodies in the first spiral feeder are larger than those of the second spiral feeder. The dust-free cellulose powder filling device aims at solving the problems that the feeding speed and precision of cellulose powder are difficult to consider at the same time, and dust pollution is caused.

The invention discloses a biological membrane electrode. The biological membrane electrode comprises a graphite felt, internal pores of the graphite felt are filled with cellulose powder, hemicellulose powder, pyrrhotite powder, Mn3O4 powder and a binder, and a layer of hemicellulose / beta-cyclodextrin composite hydrogel membrane covers part of the outer surface of the graphite felt. Compared with the existing graphite felt electrode, the biomembrane electrode disclosed by the invention can be used for remarkably improving the operation stability and denitrification efficiency of a bioelectrochemical system and the denitrification process of sewage with different complex water qualities, especially wastewater with low C / N ratio.

The present invention provides a cosmetic powder suitable for use in cosmetic compositions, which is environmentally friendly and has been surface-treated to improve its dispersibility and stability in the composition. [Solution] A hydrophobic cellulose powder is provided, comprising (a) about 75% to about 99.5% by weight of cellulose powder particles, and (b) about 0.5% to about 25% by weight of a surface treatment agent selected from modified dextrin or modified amino acids, wherein the hydrophobic cellulose powder has relatively low solubility in aqueous media, and when dispersed in an emulsion, it can provide an emulsion that is stable for more than 4 weeks.

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 relates to an MXene composite membrane for wastewater treatment and a preparation method thereof, and the preparation method comprises the following steps: growing MOF nanoparticles on the surface and interlayer of MXene in situ by a hydrothermal method to obtain an MOF-MXene material; carrying out in-situ polymerization on acrylamide and 2-acrylamido-2-methylpropanesulfonic acid to obtain a modified MXene material mixed solution; mixing with the ionic liquid of the functionalized cellulose powder to obtain a spinning solution; and electrospinning to form the film. A novel two-dimensional material MXene is used for constructing the composite membrane capable of being used for wastewater treatment, the composite membrane takes cellulose as a framework structure, layered MXene with high specific surface area and porous MOF nano particles loaded in layers of the layered MXene as adsorption main body materials, and an acrylamide copolymer polymerized on the surface is used as an auxiliary flocculation material; organic matters and heavy metals in a water body are effectively adsorbed, and synergistic removal of composite pollutants is realized; the composite membrane is good in mechanical property, stable in structure, convenient to recycle, high in regeneration capacity, capable of being repeatedly used and capable of saving resources.

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.

This invention discloses a tailings dam wastewater treatment agent, its preparation method, and its application. The agent comprises the following raw materials: lime, polyacrylamide, ferric chloride, polyaluminum chloride, magnesium lignosulfonate, sorghum straw cellulose powder, corn oligopeptides, aminoethylaminopropyltrimethoxysilane, and water. The agent is prepared by mixing sorghum straw cellulose powder with lime, polyacrylamide, ferric chloride, polyaluminum chloride, magnesium lignosulfonate, corn oligopeptides, aminoethylaminopropyltrimethoxysilane, and water, followed by filtration to obtain a precipitate. The precipitate is then washed with ethanol, vacuum dried, and pulverized. Using the method of this invention, the turbidity removal rate and heavy metal ion removal rate of tailings dam wastewater both reach over 99%, meeting the requirements for widespread application.

The invention belongs to the technical field of building materials, and discloses a method for preparing a thermal regulation plate for a building from all components by utilizing agricultural and forestry waste particles. The method comprises the following steps: 1) sequentially activating alpha-cellulose powder by using a methanol solution and DMAc (dimethylacetamide) to obtain activated cellulose; uniformly mixing the activated cellulose, DMAc and lithium chloride to obtain a cellulose solution; (2) carrying out sizing treatment on the dried agricultural and forestry waste powder by adopting a cellulose solution to prepare a plate shape, and carrying out cold pressing and hot pressing to obtain a plate base material; 3, the board base material is soaked in the phase change material composed of SCD and DHPD, low-temperature crystallization is conducted, and the heat regulation board is obtained.The method is environmentally friendly and low in cost, and the prepared board is excellent in heat regulation performance and strength and has good recycling performance.

The invention provides low-modulus muscle-like synthetic leather as well as a preparation method and application thereof. The low-modulus muscle-like synthetic leather comprises a wet-process base layer, a bonding layer and a dry-process surface layer which are sequentially stacked, the wet-process substrate layer is provided with a submicron needle-cluster-shaped microporous structure of which the interior is communicated, and the wet-process substrate layer is formed by wet-process solidification of slurry containing polyether polyurethane resin, cellulose powder and an amphiphilic modified polysiloxane pore structure regulator; the bonding layer is formed by curing semi-polyester and semi-polyether type polyurethane resin, and the mass ratio of a polyester chain segment to a polyether chain segment in the semi-polyester and semi-polyether type polyurethane resin is (1.2-1.8): 1; and the dry-method surface layer is formed by curing water-based polycarbonate polyurethane resin which takes polypropylene carbonate glycol as a soft segment. According to the low-modulus muscle-like synthetic leather disclosed by the invention, the peel strength and the folding resistance are remarkably improved while the low modulus is maintained.

The application provides a ceramic filter plate preparation process and application of the ceramic filter plate. The ceramic filter plate preparation process comprises: a ceramic filter tube preparation step S1: cellulose powder and glycerol liquid are put into a reaction kettle, stirred uniformly, then silicon nitride powder and diatomite powder are added and mixed to form a ceramic material; S2: an extrusion process is used to extrude the ceramic material to form a wave structure pipe body, and then drying, sintering and cooling processes are performed; a film coating process C1: diatomite and a dispersing agent are mixed, dispersed through ultrasonic treatment, then nano silicon dioxide and water glass are added, and the mixture is stirred to form a coating; C2: the coating is coated on the surface of the ceramic filter tube, calcined after baking to form a film layer, so that the film coating compactness and thermal shock resistance are improved; and a ceramic filter plate preparation step: after a tail end head is bonded to the tail end of the ceramic filter tube, the ceramic filter tube is inserted into a positioning hole in a head sheath for bonding, and after solidification, a seal is loaded in the head sheath.

The application provides a preparation method of a halogen-free flame retardant, and belongs to the technical field of flame retardants, and comprises the following steps: S1, microcrystalline cellulose is added into an acid solution, heated to 70-80 DEG C, and stirred and acidolysed for 4-6 h to obtain cellulose powder; S2, the cellulose powder is dispersed into water, 6-[3-(2-oxazoline group) benzene]-1, 3, 5-triazine ring-2, 4-diamine is added, ultrasonic treatment is carried out for 5-10 min, then the temperature is increased to 80-85 DEG C, and stirring reaction is carried out for 1-3 h, after cooling, washing and drying, modified cellulose is obtained; S3, the modified cellulose is added into ethanol, after adding a non-ionic surfactant, ultrasonic treatment is carried out for 5-10 min to obtain a modified cellulose dispersion liquid, a zinc salt solution is added into the modified cellulose dispersion liquid, stirring is carried out at room temperature for 5-10 h, after ending, washing and drying, a halogen-free flame retardant is obtained. The microcrystalline cellulose is acidolysed to obtain a reinforcing phase, 6-[3-(2-oxazoline group) benzene]-1, 3, 5-triazine ring-2, 4-diamine is grafted to the surface of the cellulose, and the coordination chelation of zinc ions is combined, so that the synergistic improvement of the flame retardation effect and the mechanical property is realized.