430 results about "Cellulose derivatives" patented technology

The invention relates to a sustained-release tablet capable of avoiding sudden release of a medicine after being taken together with an alcoholic beverage, the sustained-release tablet comprises a sustained-release tablet core and an anti-sudden-release material coating layer wrapping the sustained-release tablet core, and the anti-sudden-release material is composed of a polysaccharide substance and a cellulose derivative, the polysaccharide substance is selected from one or more of guar gum, xanthan gum and Arabic gum, the cellulose derivative is selected from one or more of hydroxypropyl methylcellulose, ethyl cellulose and hydroxyethyl cellulose, and the weight ratio of the polysaccharide substance to the cellulose derivative is 1: 1-10: 1. The sustained-release tablet disclosed by the invention has an excellent burst release resisting effect when being taken together with an alcoholic beverage, and the clinical medication safety and effectiveness of a preparation are improved.

The invention discloses a cellulose derivative doped perovskite active layer, a preparation method thereof and a perovskite solar cell, and relates to the technical field of solar cells, and the preparation method comprises the steps: dissolving PbI2, PbBr2, CsI, MABr, FAI and MACl in a solvent to obtain a mixed solution; adding HPMCP into the mixed solution to obtain a perovskite precursor solution; and in a protective gas atmosphere, spin-coating the perovskite precursor solution on a substrate, dropwise adding chlorobenzene in the spin-coating process, and heating the substrate after spin-coating to obtain the perovskite active layer. The method has the beneficial effects that the leakage of lead in perovskite is effectively inhibited by utilizing the physical wrapping effect of HPMCP and the strong coordinate bond effect and hydrogen bond effect of perovskite, the quality of a perovskite active layer thin film can be improved, grain boundary defects are effectively passivated, ion migration is inhibited, and good optical performance is achieved; the photoelectric conversion efficiency and the environmental stability of the halogen hybrid perovskite solar cell device are effectively improved.

The invention relates to the technical field of food processing, in particular to a grape wine or fruit wine fermentation nutritional agent and application thereof. The invention provides a grape wine or fruit wine fermentation nutritional agent which comprises the following components in percentage by weight: 85-99% of glutathione-containing yeast product and 1-15% of cellulose and / or cellulose derivatives. The yeast product and cellulose substances have an adsorption effect, can adsorb harmful substances such as medium-chain fatty acid generated in the yeast fermentation process, provides crystal nucleuses for release of carbon dioxide and accelerates release of carbon dioxide, and the more carbon dioxide is dissolved in the fermentation process, the more acid is, and the greater the damage to yeast is. According to the invention, the content of solids in the grape juice is improved and a carrier is provided for uniform distribution of yeast by utilizing the synergistic interaction of a yeast product and cellulose substances, and meanwhile, the fermentation nutritional agent disclosed by the invention can reduce the damage of harmful substances generated in the fermentation process, improve the fermentation environment and improve the fermentation effect.

The invention provides a separation and detection method of a cis-isomer in olotinib. According to the method, chiral chromatographic column high performance liquid chromatography is adopted, cellulose derivative bonded silica gel is taken as a stationary phase, and n-hexane and ethanol are taken as a mobile phase. The method provided by the invention can effectively separate and measure the cis-isomer in the olotinib, and has the advantages of high efficiency, simplicity, convenience, high sensitivity, good separation effect and separation degree of 5.42. The invention provides a detection method for developing and marketing the olatinib and accurately detecting the cis-isomer in the olatinib, and ensures the product quality.

A composition includes particles of a cellulose derivative and a surface treatment compound. The particles of the cellulose derivative have an average particle size from 0.08 μm to 100 μm. The surface treatment compound is an organic compound having a long-chain alkyl group and / or an inorganic powder. The inorganic powder has an average particle size of ⅓ or less of the average particle size of the particles of the cellulose derivative. A cosmetic composition includes the composition. A method for producing the composition includes mixing the particles of the cellulose derivative and the surface treatment compound. In the mixing, the particles of the cellulose derivative and the surface treatment compound are dry-mixed.

Modified release formulations, such as solid oral dosage forms comprising a core composition comprising Compound (I) and / or a pharmaceutically acceptable salt thereof; a sub-coating layer coating the core composition, said sub-coating layer comprising a polyvinyl alcohol and / or a hydroxypropyl methyl cellulose; and an enteric coating layer encapsulating the sub-coating layer and the core composition, said enteric coating layer comprising at least one polymer selected from an acrylic / methacrylic / ethacrylic acid homopolymer and copolymers thereof, a cellulose derivative, and a polyvinylpyrrolidone, and methods of administration of a Bruton's tyrosine kinase (BTK) inhibitor using said formulations.

The invention belongs to the technical field of dust suppressants, and particularly relates to a biomass-based dust suppressant as well as a preparation method and application thereof. The biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. After the dust suppressant is sprayed on the surface layer of minerals such as coal, the dust suppression mechanism is changed according to the change of the water content, and when the water content is high, the dust suppressant can adhere to coal dust to suppress flying of the coal dust; when water volatilizes, the micro-nano biomass material or the water-soluble cellulose derivative can spontaneously assemble into a film, and the dried dust suppressant has a complete film-forming structure, certain strength, wind erosion resistance and strong affinity with coal, so that the long-time dust suppression capability of the dust suppressant can be ensured.

A grape wine or fruit wine fermentation nutritional agent and a use thereof. The grape wine or fruit wine fermentation nutritional agent comprises the following components in percentage by weight: 85-99% of a glutathione-containing yeast product, and 1-15% of cellulose and / or a cellulose derivative. By means of the synergistic effect of a yeast product and a cellulose substance, the content of solids in grape juice is ameliorated, and a carrier is provided for uniform distribution of yeast, and the fermentation nutritional agent can also reduce harm of harmful substances generated in the fermentation process, thus improving the fermentation environment, and enhancing the fermentation effect.

The invention belongs to the technical field of diaphragms, and particularly relates to a cellulose and cellulose derivative doped composite diaphragm as well as a preparation method and application thereof.The preparation method comprises the following steps: adding a thermoplastic organic high-molecular polymer, a cellulose derivative and metal oxide nanoparticles into an organic solvent, dissolving, adding a pore-foaming agent, and uniformly stirring; uniformly mixing, defoaming to obtain a membrane casting solution, and blade-coating to obtain a liquid membrane; the liquid film is placed in a wet air atmosphere with the relative humidity of 30%-80% for pre-phase inversion, in the pre-phase inversion process, water vapor in wet air permeates into the liquid film and exchanges with the organic solvent in the liquid film, and a wet film is obtained; and immersing the wet membrane into an extracting agent for phase conversion to obtain the cellulose and derivative doped composite diaphragm. According to the preparation method, safe operation of the diaphragm can be ensured, the electrolytic efficiency of the diaphragm is remarkably improved, and the diaphragm is excellent in stability of long-time operation.

The invention discloses a preparation method and application of flame-retardant radiation refrigeration cellulose foam, and belongs to the technical field of material science. The method comprises the following steps: firstly, adding cellulose fibers, inorganic nanoparticles and a surfactant into a cellulose derivative solution, and preparing uniform cellulose fiber wet foam in a high-speed stirring manner; and then, drying the wet foam to finally obtain the cellulose fiber foam material with excellent flame retardance and radiation refrigeration performance. The prepared cellulose fiber foam has a graded porous structure, can effectively reflect sunlight and emit infrared light, and has excellent radiation refrigeration performance. In addition, inorganic nanoparticles are introduced into the foam material, so that the radiation refrigeration capacity of the material is further improved, and meanwhile, the foam is endowed with a good flame-retardant characteristic.

The invention provides a modified cellulose thickening agent for fracturing fluid, the fracturing fluid and a preparation method of the fracturing fluid, and relates to the technical field of oil and gas exploitation. Compared with hydroxy propyl cellulose and carboxymethyl cellulose, the cellulose derivative prepared by carrying out graft modification on carboxymethyl cellulose by utilizing amino-terminated polysiloxane is used as a thickening agent, and compared with the hydroxy propyl cellulose and the carboxymethyl cellulose, the cellulose derivative disclosed by the invention has higher temperature resistance and shear resistance, good swelling property, low residue content and good stability. And the damage to the stratum is reduced.

The invention provides a capsule and a preparation method thereof, the capsule comprises a core material and a rubber sheet wrapping the core material, the core material comprises an aqueous liquid preparation, an oily preparation and a structuring agent; the structuring agent comprises cellulose and / or a cellulose derivative, a low-molecular-weight lipid and a surfactant; the core material is paste, colloid or a solid-liquid mixture, and the core material can realize that the aqueous liquid preparation is stably dispersed and fixed in the oily preparation, so that the core material is stably wrapped by the rubber skin. The invention also discloses an aerosol generating product using the capsule.

The utility model relates to the technical field of packaging paperboards, in particular to a waterproof and moistureproof environment-friendly packaging paperboard which comprises a base material layer, a waterproof layer and a moistureproof layer, the waterproof layer is arranged on the outer side of the base material layer and made of a mixture of nano silicon dioxide and natural wax, and the moistureproof layer is arranged on the outer side of the waterproof layer and made of a mixture of nano silicon dioxide and natural wax. The waterproof layer is made of a composite material of modified starch and cellulose derivatives, the waterproof layer and the moisture-proof layer are connected through a nano-microporous structure, the nano-microporous structure is filled with a moisture absorbent, a groove is formed in the surface of the base material layer, the groove is filled with reinforced fibers, and a biodegradable film is further arranged between the waterproof layer and the base material layer. The waterproof and moistureproof environment-friendly packaging paperboard not only has excellent waterproof and moistureproof performance, but also meets the environment-friendly requirement, the production process is safe and harmless, meanwhile, the paperboard retains good air permeability and printing adaptability, and is suitable for various packaging requirements.

The invention relates to the field of water environment pollution treatment, in particular to a bimetal MOF modified cellulose derived carbon aerogel catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1) dissolving a transition metal salt and an organic ligand in an organic solvent to prepare a bimetallic MOF precursor solution; 2) dissolving a cellulose derivative in water, and treating to prepare cellulose aerogel; (3) immersing cellulose aerogel into the precursor solution, and carrying out in-situ growth to prepare MOF modified cellulose gel; and 4) carrying out carbonization treatment on the modified cellulose gel to prepare the bimetallic MOF modified cellulose-derived carbon aerogel catalyst. The catalyst has extremely high physical and chemical stability, meanwhile, the catalytic performance of the catalyst is effectively improved by means of mechanisms such as bi-metal synergism, graded electron transfer and high-dispersion active sites, and the catalyst can be effectively used for effective and efficient catalytic degradation of organic pollutants in a water body and is beneficial to separation and recovery.

The invention discloses a pyridine quaternized cellulose derivative and a preparation method thereof, and belongs to the field of modified cellulose derivatives. According to the method, sodium carboxymethyl cellulose is taken as a raw material, and a target product is prepared through a three-step method of epoxy group grafting, sulfydryl-epoxy click chemical reaction and pyridine quaternization reaction in sequence. According to the method, the high efficiency of click chemistry and the modular design concept are innovatively introduced into the field of cellulose derivative modification, the problems that a traditional quaternization method is uncontrollable in substitution degree, many in side reaction and poor in molecular design flexibility are solved, and the method has the advantages of being mild in reaction condition, high in efficiency and clear in product structure.

The invention relates to a high-temperature-resistant colorless polyimide film and a preparation method thereof, and belongs to the technical field of polymer films, and the preparation method specifically comprises the following steps: proportionally adding a diamine monomer and a dianhydride monomer into a high-boiling-point solvent, and reacting to generate a polyamide acid precursor solution; depositing a SiO2 layer on the cellulose derivative by using a sol-gel method to prepare modified cellulose; wherein the cellulose derivative is cellulose acetate; and adding the modified cellulose into the polyamide acid precursor solution, uniformly mixing, coating on the surface of a carrier, cooling after stage heat treatment, and stripping to obtain the high-temperature-resistant colorless polyimide film. Two enhancement modes of molecular design enhancement and modified cellulose enhancement are adopted, so that the comprehensive performance of the film is remarkably improved. And meanwhile, through a staged annealing process, the interface bonding of SiO2 and AC can be optimized while the internal stress of PI is eliminated, and finally, the high-strength, high-heat-resistance and low-stress composite film is realized.

To provide a negative electrode for a non-aqueous electrolyte storage element that can achieve both a low internal resistance (DC resistance) and a high capacity retention rate after charge / discharge cycles for the non-aqueous electrolyte storage element, and a non-aqueous electrolyte storage element that achieves both a low internal resistance (DC resistance) and a high capacity retention rate after charge / discharge cycles.SOLUTION: A negative electrode for a non-aqueous electrolyte storage element according to an embodiment of the present invention includes a negative electrode active material layer containing a carbon-based active material, a cellulose derivative, and a layered silicate, and the content of the cellulose derivative in the negative electrode active material layer is less than 0.8 mass%.SELECTED DRAWING: Figure 1

The present disclosure provides a hydroseeding substrate comprising primary solids from an anaerobic digester, a cover composition comprising bentonite clay and a water-dispersible polymer or starch, and a surface-treated hydroxypropyl methyl cellulose (HPMC). The primary solids may comprise fibrous solids from dairy, poultry, hog, or cattle waste. The water-dispersible polymer may include one or more cellulose derivatives. The surface-treated HPMC may be present in an amount of 0.1 to 20 weight percent of the substrate. The hydroseeding substrate may further include a fertilizer and a soil adjuvant. The disclosure also provides a method of producing a dissolvable fertilizer package and the resulting package, comprising a dried mixture of primary solids from an anaerobic digester and nutrients contained within a tube formed from a polyvinyl alcohol film that is 85-90% hydrolyzed.

The nitric oxide gel for treating endometrial injury is composed of a gel matrix and a nitric oxide gas solution, the nitric oxide gas solution is uniformly dispersed in the gel matrix, and the volume ratio of the gel matrix to the nitric oxide gas solution is 3: 1-1: 3. The gel matrix is composed of one or more of poloxamer and derivatives thereof, povidone, carbomer and cellulose derivatives, and the nitric oxide gas solution is formed by dispersing nitric oxide gas in absolute ethyl alcohol or water-free and oxygen-free polyhydric alcohol which is in a liquid state at the temperature of 25 DEG C. According to the nitric oxide gel for treating the endometrial injury, the limitation bottleneck of the nitric oxide gel for treating the endometrial injury is overcome, meanwhile, the safe, effective, convenient and economical requirements of clinical treatment are met, and the effect of nitric oxide on treating the endometrial injury is fully exerted.

A cellulosic particle contains 90 parts by mass or more and 99.5 parts by mass or less of cellulose; and 0.5 parts by mass or more and 10 parts by mass or less of a cellulose derivative.

The embodiments disclose a graphene ink composition including a thermal plasma device configured to produce an oxidized graphene, a composition comprising the oxidized graphene, a hydrophobic fluid component and a cellulose derivative, wherein the hydrophobic fluid component comprises at least one from a group of alcohols, glycols, terpenes, terpene alcohols, or combinations thereof, and wherein the composition comprises a graphene-cellulose derivative solids concentration of 2% to 50% weight by volume (w / v) and a viscosity of 0.1 to 100 Pa·s.

Marker composition comprising water, 1-10 wt.% non-ionic surfactant selected from alkyl polyglucosides, alcohol ethoxylates and alcohol ethoxylate propoxylates, or mixtures thereof, 1-5% organic solve

The invention discloses hydrogel for improving satiety as well as a preparation method and application of the hydrogel, and relates to the technical field of polymer gel preparation. The preparation method of the hydrogel for improving satiety comprises the following steps: mixing a cellulose derivative and water, adding a crosslinking aid, and fully and uniformly mixing to obtain a first solution; adding pectin into the first solution, fully and uniformly mixing, and adjusting the pH value to 7.5-8.0 to obtain a second solution; carrying out physical cross-linking on the second solution under ultrasonic treatment to obtain a first cross-linked substance; adding pectin into the first cross-linked substance, and continuously stirring to obtain gel; and removing moisture to obtain the hydrogel for improving satiety. The prepared hydrogel is good in mechanical performance and high in water absorption capacity, the satiety is improved through water absorption expansion, the good weight reduction effect is achieved, and meanwhile the hydrogel has the good effect of adjusting intestinal flora.

The invention relates to a nicotine pellet composition, a nicotine pellet buccal bag and a preparation method of the nicotine pellet buccal bag. Wherein the nicotine pellet composition comprises nicotine, a blank pellet core, an adhesive, a sweetening agent, a pH regulator, cellulose and a cellulose derivative, a polymer coating material, a lubricant, essence, perfume and a solvent, the blank pellet core is loaded with the nicotine, and the polymer coating material forms a single-layer or multi-layer drug carrier or coating on the blank pellet core. When the polymer coating material forms a multi-layer drug loading or coating, the polymer coating material sequentially comprises an isolating layer, a drug-containing layer, a protective layer and a drug loading layer from inside to outside. The invention provides a nicotine pellet composition and a nicotine pellet buccal bag which are good in flowability, stable in nicotine release and stable in aroma release, and can be used for smoking cessation or treatment of nicotine dependence.

The invention discloses a pressure-sensitive adhesive, a preparation method thereof and application of the pressure-sensitive adhesive in a high-temperature-resistant zero-climbing large-size polaroid protective film, and belongs to the technical field of optical protective films. The pressure-sensitive adhesive comprises a cellulose derivative modified acrylate polymer, a curing agent, an antistatic agent, a wetting agent and a first solvent; the cellulose derivative modified acrylate polymer is prepared from an acrylate hard monomer, an acrylate soft monomer, an acrylate functional monomer, a cellulose derivative containing double bonds, an initiator and a second solvent through free radical polymerization; the prepared pressure-sensitive adhesive is applied to the high-temperature-resistant zero-climbing large-size polaroid protective film, the problem that the high-speed stripping force and the low-speed stripping force are too large in climbing when the protective film is stripped after the large-size polaroid protective film is attached for a long time at present can be solved, and the surface resistivity and the film tearing voltage are not influenced while the stripping force climbing is solved.

The invention belongs to the technical field of pharmaceutical analysis, and particularly relates to a detection method of an evocamide enantiomer, which comprises the following steps: S1, preparing a test solution; s2, preparing a contrast solution; s3, preparing a system applicable solution; s4, carrying out a system applicability test; s5, testing a test sample and a contrast solution; a chromatographic column is a chiral chromatographic column taking a polysaccharide derivative or a cellulose derivative as a filler, and a mixed solution of n-hexane, isopropanol, trifluoroacetic acid and diethylamine is taken as a mobile phase to detect the Evocadum enantiomer. The method has the characteristics of simplicity in operation, high sensitivity and high accuracy, the chromatographic peaks are high in separation degree, do not interfere with one another, the peak shape is good, the result accuracy is guaranteed, the method can be used for detecting enantiomers in the Evocamide and the Evocamide preparation, the level of the enantiomers of the Evocamide is effectively controlled, and the medication safety is guaranteed.

Provided is a composition containing a solvent (I); and a cellulose derivative having a constituent unit or a salt thereof (II).

This invention relates to the field of medical dressing technology, and discloses a hydrogel dressing, its preparation method, and its application. The hydrogel dressing is prepared by physical cross-linking of the following raw materials: 6% (w / v) anionic polysaccharide, and 1%-3% (w / v) cellulose derivatives or anionic polymers. This invention provides an advanced hydrogel dressing solution with balanced performance, adjustable function, safety, gentleness, and ease of industrialization, effectively overcoming many limitations of existing technologies and possessing significant application value in wound care.

Porous cellulose particles contain a cellulose, a cellulose derivative, or a mixture thereof as a main component, in which the porous cellulose particles have open cells extending from a particle surface to a particle interior, and have a BET specific surface area of 1.7 m2 / g or more and 24.0 m2 / g or less.

This invention provides ozenafloxacin nanocrystalline particles, its preparation method, and its uses. The preparation method includes the following steps: dissolving ozenafloxacin raw material in an acidic aqueous solution, then adding a stabilizer, stirring, and adjusting the pH to 4-6; wherein the stabilizer is a siloxane and / or a cellulose derivative. The preparation method provided by this invention can obtain ozenafloxacin nanocrystalline particles with uniform and stable particle size distribution. Further research by the inventors has found that formulations containing these ozenafloxacin nanocrystalline particles can increase the amount of drug retained in the skin, thereby increasing the local drug concentration, achieving effective killing of Propionibacterium acnes, and preventing the development of drug resistance.