527 results about "Cellulose Powders" patented technology

The invention relates to a high-strength FeOOH desulfurizer, which consists of 50 to 95 weight percent of amorphous FeOOH, 0 to 45 weight percent of carrier and 5 to 50 weight percent of organic binder, wherein the carrier is one or more of aluminium oxide, diatomite, natural zeolite and catalytic cracking spent catalyst; and the organic binder is one or more of sodium carboxymethyl cellulose, sesbania powder and cellulose powder. The invention further discloses a preparation method for the desulfurizer on the basis. The FeOOH desulfurizer prepared by the preparation method has high sulfur capacity, high mechanical strength and wider applicable desulfurization range.

This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.

The invention discloses a method for preparing supercapacitor carbon aerogel by the utilization of bagasse. The method includes the steps that the bagasse is used for preparing cellulose powder without xylogen and hemicellulose; the cellulose powder is used for preparing cellulose aerogel; the cellulose aerogel is carbonized to obtain carbon aerogel; the carbon aerogel is activated to obtain the supercapacitor carbon aerogel. According to the method, the industrial waste bagasse is used as raw materials, the requirements for sustainable development and environmental protection are met, and the cost of electrode materials is effectively lowered. The product prepared through the method is of a three-dimensional hierarchical pore structure; compared with a product obtained through a conventional method, the product prepared through the method is large in specific area and good in repeatability, and has higher specific capacitance and better cycling stability. The method is more suitable for preparing supercapacitor electrode materials and has wide development prospects.

The nanometer microcrystal cellulose powder is surface modified nanometer microcrystal cellulose with added hydrophilic colloid in the amount of 5-150 wt% of nanometer microcrystal cellulose and has grain size of 6.3-100 nanometers. During its preparation, hydrophilic colloid is dispersed homogeneously into water dispersed medium of surface modified nanometer microcrystal cellulose and the mixture is then dried and crushed. The nanometer microcrystal cellulose is easy to be water dispersed to form colloid, which is homogeneous and high in gluing strength and has the small size of microcrystal cellulose maintained, so that it has wide and unique application foreground in food production, medicine, papermaking, textile, new material preparation and other fields.

The invention relates to the field of aerogel and electromagnetic absorbing materials, in particular to a preparation method of MXene/cellulose composite aerogel. The preparation method includes the steps that firstly, MAX phase ceramic powder is added into a mixed water solution of lithium fluoride, hydrochloric acid and hydrofluoric acid in a certain proportion for etching to obtain MXene nano-powder; a cellulose sol method is adopted, cellulose powder is added into a mixed water solution of sodium hydroxide and urea in a certain proportion, and a transparent cellulose mixed solution is prepared by cooling the mixture to -12 DEG C; the temperature is maintained, the MXene nano-powder is added into the cellulose mixed solution, and then the appropriate amount of epichlorohydrin is added to the mixture and the mixture is stirred thoroughly for chemical crosslinking; the temperature is raised, and the obtained homogeneous mixture is subjected to a gel reaction; and a gel product is frozen directionally and then freeze-dried to obtain the MXene/cellulose composite aerogel. The composite aerogel has the characteristics of low density, high porosity, good absorbing performance, wide absorbing frequency band and the like, and is convenient to use and suitable for large-scale application in the aerospace field.

The invention discloses a method for hydrolyzing lignocellulose. Lignocellulose is pulverized into particles, and the particles are mixed with water to form even seriflux; the seriflux is preheated to60-150 DEG C by using ultrasonic waves or microwaves; the preheated even seriflux is quickly heated to 120-300 DEG C, solid acid is added and used as a catalyst, and stirring and catalytic reaction are simultaneously carried out for 15-300 minutes. The use of the ultrasonic waves or microwaves radiation in synergism with solid alkali for catalyzing and hydrolyzing the lignocellulose can greatly reduce the reaction time as well as energy consumption. The solid acid catalyst can be repeatedly used, is easily separated, and has the advantages of high mechanical strength, high durability, certainselectivity, relative singularity of catalytic hydrolyzate, high hydrolyzing efficiency and good market application prospect.

The invention discloses a preparation method of nano-cellulose, comprising the following steps of: firstly, swelling the raw material cellulose by aqueous alkali, soaking for a while, centrifugally separating out cellulose, and washing by deionized water till the filter liquor is neutral; dispersing the separated cellulose in water, adding sodium bromide, 2, 2, 6, 6-tetramethyl piperidine-1-oxide and sodium hypochlorite solution, carrying out an oxidation reaction under sonic oscillation, centrifugally separating after reaction, and carrying out freeze drying treatment on suspension liquid to obtain the nano-cellulose powder. Compared with the prior art, the preparation method is incompact in cellulose structure, can enlarge the unit cell distance, and can improve the reaction accessibility after the raw material cellulose is pretreated, so that the oxidation reaction efficiency can be improved, and the product yield can be obviously improved; the oxidation reaction conditions are mild, and are easy to control, and the product quality can not be influenced due to the fact that only a small quantity of sodium chloride and minute quantity of oxidizing agent are mixed in a reaction system after the reaction; and the sonic oscillation is adopted in the process of reaction, so that the oxidation reaction speed can be accelerated, and the reaction time can be obviously shortened.

The present invention refers to the use of screens comprising at least two layers of different mesh or pore size in a cellulose powder preparation method as well as to said method, wherein grinding the cellulose pulp and sieving the obtained particles can be carried out on-line.

The present invention relates to a method for producing tire using high strength lyocell dip cord, and more particularity, to a lyocell dip cord and tire produced by a method comprising the steps of: (A) dissolving 0.01 to 3 wt % of cellulose powder in portions in concentrated liquid N-methylmorpholine N-oxide (NMMO) to prepare cellulose-containing NMMO solution; (B) feeding the NMMO solution and cellulose powder into an extruder having a screw to be subjected to dispersing, mixing, shearing, kneading, melting and measuring ability in the extruder to prepare a swollen and homogenized cellulose solution; (C) spinning the cellulose solution through a spinning nozzle, passing the spinning solution through an air gap to a coagulation bath and coagulating the spinning solution to obtain a multifilament; (D) subject the multifilament to water-wash, drying and oil-treatment, followed by winding; and (E) twisting the wound yarn with a twisting machine to prepare a greige cord, weaving the greige cord and dipping the woven cord in a dipping solution. According to the present invention, by lowering of solidification temperature of NMMO by dissolving a small amount of pulp in concentrated liquid NMMO, it is possible to prepare a homogeneous cellulose solution at a low temperature. Also, the lyocell dip cord prepared according to the present invention has excellent adhesion to rubber, tenacity and modulus. And, the tire in which the lyocell dip cord according to the present invention is applied to the carcass ply has excellent dimensional stability and handling stability.

With regard to compositions derived from active ingredients and other additives in medical, food and industrial fields, there have been problems that the active ingredients cannot be uniformly mixed, and that the active ingredients become segregated and lose uniformity as the active ingredients undergo transport, input, and filling processes. There is provided a cellulose powder which improves the uniformity of compositions containing active ingredients or other additives to prevent segregation of the active ingredients, wherein the cellulose powder contains cellulose I type crystals, has an average particle diameter of less than 30 μm, a powder density of 0.1 to 0.45 g/cm³, a tapping density of 0.1 to 0.5 g/cm³, a repose angle of 35 to 50°, a specific surface of more than or equal to 0.1 m²/g and less than 20 m²/g, an internal friction angle of 36 to 42°, and is a cellulose powder including a secondary flocculation structure in which primary particles are flocculated.

The invention provides a method for preparing straw cellulose nano crystal whisker. The method is characterized by comprising the steps: utilizing crop straws as raw materials, performing pretreatment and cellulose purifying treatment, mechanically grinding into straw cellulose powder; performing DMSO (Dimethylsulfoxide) treatment and TEMPO (Tetramethylpiperidine) oxidation treatment and stirring at high speed, thereby obtaining straw cellulose powder suspension liquid; performing centrifugal treatment, decentralized treatment and freezing and drying, thereby obtaining straw cellulose nano crystal whisker. The preparation process is simple and has high yield and low energy consumption; no toxic and harmful matters are discharged during production and the preparation process has a capability of large-scale promotion and application; utilized straws can be wastes of plant crops such as rice straws, wheat straws and oilseed rape straws; the raw material has wide source and cost is low; pollution to the environment is solved and additional value of straws is improved.

The invention discloses a method for preparing Pickering emulsion by utilizing modified nano-crystalline cellulose. The method comprises the following steps: 1) taking the nano-crystalline cellulose modified with an amphiphilic segmented copolymer and grinding into powder, thereby acquiring the amphiphilic segmented copolymer modified nano-crystalline cellulose powder; 2) dispersing the amphiphilic segmented copolymer modified nano-crystalline cellulose powder acquired in the step 1) into deionized water, thereby forming modified nano-crystalline cellulose dispersion liquid; and 3) weighting an oily solvent, adding into the modified nano-crystalline cellulose dispersion liquid acquired in the step 2), and mixing and emulsifying, thereby forming stable Pickering emulsion. The method for preparing the Pickering emulsion by utilizing the modified nano-crystalline cellulose has the characteristics of less CNC dosage and low application cost.

The invention relates to a honeycomb heat accumulator made of silicon carbide-corundum composite materials, which comprises the following main raw materials: 20-30wt% of silicon carbide powder, 4-8wt% of zirconia corundum powder, 20-30wt% of corundum powder, 15-20wt% of porzite powder, 15-30wt% of composition of kyanite, andalusite and sillimanite, 4-8wt% of kaolin and 2-5wt% of cellulose powder. The preparation method of the honeycomb heat accumulator comprises the following steps: adding the main raw materials into a ball mill for ball milling; adding stearic acid of which the weight is not greater than 1% of the total weight of the main raw materials for ball milling, and then, sieving to obtain a mixture; respectively adding tung oil of which the weight is not greater than 1% of the weight of the mixture and glycerol of which the weight is not greater than 1% of the weight of the mixture for mixing, aging and vacuum pugmill to form pug segments; carrying out extrusion forming in a mold, and drying; and insulating at the temperature of 1400-1450 DEG C for 4-8 hours, and then, calcining. The honeycomb heat accumulator of the invention has the characteristics of high fire resistance, good thermal shock resistance, strong corrosion resistance, large heat exchange area, small gas flow resistance, high heat accumulating efficiency, small floor space and long service life which can be more than two years, and is widely used for heat accumulating type heating furnaces of black and non-ferrous smelting, thermal power generation, petrochemical industry, ceramics, glass, machining, civil cookers and the like.

The invention relates to a recyclable dry desulfurizer with high sulfur capacity. The desulfurizer contains not less than 88% of substances containing FeOOH and not less than 7% of organic binders, wherein the organic binder is one or more of sodium carboxymethyl cellulose, sesbania and cellulose powder. The invention further discloses a preparation method of the desulfurizer and a regeneration method of waste agents generated after the desulfurizer is used. The invention solves the following problems in the prior art: the dry-formed desulfurizer has low sulfur capacity, and after the dry-formed desulfurizer is used once, the waste agents can not be regenerated or the regeneration cost is high, so that great amount of waste agents are only buried, thus not only wasting the effective resources in the original desulfurizer but also leading to new environmental pollution problems.

The invention discloses a daily feed used for eupolyphoge sinensis culturing. The daily feed comprises a concentrated feed and a greenfeed. The concentrated feed is composed of following ingredients, by weight, 2 to 3 parts of yeast, 2 to 5 parts of beer yeast, 0.5 to 1 part of cane sugar, 65 to 75 parts of wheat bran, 5 to 7 parts of soya bean meal, 2 to 5 parts of concentrated soybean protein powder, 6 to 8 parts of corn powder, 0.02 to 0.04 part of ascorbic acid, 0.03 to 0.05 part of multivitamin, and 0.3 to 0.5 part of cellulose powder. The greenfeed is composed of following ingredients, by weight, 40 to 50 parts of pumpkin, 20 to 30 parts of black locust leaf, 10 to 20 parts of alniphyllum fortune, and 10 to 20 parts of Chinese cabbage. According to the daily feed, mixing feeding of the concentrated feed and the greenfeed is adopted, comprehensive nutritional demands of eupolyphoge sinensis are satisfied; yeast is added into the daily feed, so that dyspepsia of eupolyphoge sinensis is treated effectively, food consumption is increased, and eupolyphoge sinensis growth is promoted; appetite of eupolyphoge sinensis is promoted effectively by adding capsaicine into the daily feed at set intervals; and feed consumption of eupolyphoge sinensis is ensured.

The invention relates to a method for preparing microcrystalline cellulose at low temperature. The method is characterized by comprising the following steps: (1) completely soaking the cellulose raw material in a soaking solvent, wherein the soaking solvent is water or an acid solution with mass percent concentration not over 15wt% or an oxide solution with mass percent concentration not over 5wt%; (2) freezing the cellulose raw material after the soaking treatment in the step (1), and grinding; (3) performing high-speed shear treatment on the cellulose powder obtained by the grinding in the step (2), and performing aftertreatment on the product after the high-speed shear treatment to obtain the microcrystalline cellulose. The method for preparing microcrystalline cellulose at low temperature provided by the invention can obtain microcrystalline cellulose with different polymerization degrees lower than 350 and relatively high crystallization degree; high-temperature treatment process can be avoided, the energy consumption is low, and the process is simple and green and environment-friendly.

The invention discloses biomass resin and a method for preparing a fibre oriented shaving composite board by using the biomass resin as an adhesive. The biomass resin is prepared from, by weight, 100 parts of water, 1-3.5 parts of a compound stabilizer, 5-50 parts of vegetable protein powder, 0.01-0.05 part of a protease additive, 2-10 parts of plant starch, 1-7 parts of modified plant cellulose powder, 0.01-0.05 part of a complex enzyme preparation, 0.1-5 parts of a molecular structure acylation modifier, 0.1-0.5 part of a cross-linking agent, 0.01-10 parts of a resin additive, 0.01-0.05 part of an antifoaming agent, 0.1-0.5 part of a preservative and 5-10 parts of a filler. In addition, the biomass resin is used as an adhesive to be applied in a preparation technology of a fibre oriented shaving composite board. Viscosity is reduced, solid content is raised, and secondary gluing performance after drying of the adhesive is enhanced.

The invention discloses centropristis striata linnaeus young fish ecotype mixed feed, which is characterized in that the mixed feed is prepared from the following components in weight percentage: 52.0 to 62.5 percent of fish meal, 1.0 to 6.0 percent of casein, 6.0 to 11.0 percent of wheat gluten, 13.0 to 25.0 percent of alfa-starch, 0 to 3.0 percent of fish oil, 0.5 to 7.0 percent of soybean oil, 0 to 17.0 percent of cellulose powder, 0. to 0.9 percent of mixing powder of a plurality of amino acids, 0.5 to 1.0 percent of composite vitamins, 0.8 to 1.2 percent of composite mineral salt, 0.01 to 0.05 percent of zymin, 0.1 to 0.6 percent of small peptide and 0.05 to 0.3 percent of compound traditional Chinese herbal preparation. Tests show that the centropristis striata linnaeus young fish fed by the mixed feed has the advantages of high feed intake, obvious food calling and high growth rate; and the weight is averagely increased by 24.50 to 69.62 percent, the survival rate is up to between 90.0 and 100 percent which is 85.0 percent higher than that of the comparative group, feed coefficient is up to between 1.20 and 1.84, and disease resistant capability is improved.

The present invention relates to a method for making highly homogenized cellulose solution, wherein the cellulose solution is obtained by obtaining a solidified N-methylmorphorine-N-oxide (hereinafter, referred to as ‘NMMO’) hydrates which is solidified a liquid-state NMMO hydrates comprising 10 to 18% by weight water by using a simple screw-type feeder and by controlling the temperature, feeding the solidified NMMO into a twin-screw type extruder continuously, obtaining a cellulose solution which is fully swelled in a few minutes by dispersing and mixing with cellulose powder in the twin-screw type extruder, and extruding a highly homogenized cellulose solution by feeding the obtained cellulose solution into a melting zone of the extruder to melting the cellulose solution in a few minutes by minimum heat and shear force.

A wood-like molded product which is permitted to have wood-like features without using a natural wood material, and is usable as a bottle case to keep a wine bottle or the like inserted therein, and the like. The wood-like molded product includes: a cylindrical main body (2) which is made of a mixed material containing: fine cellulose powder particles (N) obtained from a wood material; and resin (P), and permits a bottle to be inserted thereinto; and a supporting member (3) provided in the cylindrical main body, to support a bottom face of the bottle inserted in the cylindrical main body.

The invention discloses a macroscopic preparation method of a cellulose nanocrystal (CNC), which is green and environment-friendly. Firstly, cellulose is crushed and then is pretreated; afterwards, an oxometallate solution and an organic acid are added, the oxydrolysis is carried out, and the CNC with a carboxyl group on a surface is obtained after centrifugal dialysis treatment. The yield of the preparation method can exceed 70 percent; the length of the made CNC can be adjusted in the range of 195nm to 260nm; the content of the carboxyl group on the surface can reach 50mmol/g; compared with a CNC made by a sulfuric-acid acid hydrolysis method, the CNC made by the macroscopic preparation method provided by the invention is increased by 50 to 100 DEG C in heat resistance; used oxometallate and organic acid are both green reagents and are further a few in use levels; problems that the preparation cost of the CNC is high and further the environmental pollution is easily caused, and the like, at present are solved.

A cellulose powder which has an average degree of polymerization of 150 to 450, an average particle diameter of 30 to 250 μm, an apparent specific volume exceeding 7 cm³/g, and a retention of polyethylene glycol having a molecular weight of 400 to 190% or higher.

The invention discloses a magnetic amphoteric cellulose powder material, a preparation method and applications. The preparation method comprises the following steps: by taking amphoteric microcrystalline cellulose as a carrier, generating ferroferric oxide magnetic nanoparticles through in-situ co-precipitation, and adhering on the surface of the amphoteric microcrystalline cellulose and in pore ducts in situ, to realize the superpara magnetism function of the amphoteric microcrystalline cellulose, wherein the prepared amphoteric microcrystalline cellulose has intelligent response characteristic to an additional magnetic field. Through the amphoteric characteristic, high hydrophility and high specific area, the magnetic amphoteric cellulose powder material can be used for adsorbing waste water as a high-efficiency adsorption material, especially has the capability of obviously removing heavy metal ions and organic pollutants, can be easily separated and recovered under the additional magnetic field, and is economic and practical. In addition, due to the biocompatibility, biodegradability, favorable affinity and superpara magnetism characteristics, the magnetic amphoteric cellulose powder material can be used as a target drug carrier material, a target functional timbering material, a target vascular blocking material, a target medical adsorption material and the like, and the intelligent guide control can be easily realized through the additional magnetic field.