338 results about "Cellulose derivatives" patented technology

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.

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.

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 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

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 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.

The invention relates to a cellulose-based hydrogel prepared based on a cellulose copolymer, a cellulose derivative copolymer or a blend thereof, ultramicro fibers of cellulose form a net structure, and the cellulose-based hydrogel has a highly-ordered three-dimensional micro-nano structure, is better in transparency and is more beneficial to observation of a cell state. The cellulose-based hydrogel is suitable for culture of 3D cell culture tissues and organoids, the stem cells cultured by the cellulose-based hydrogel can form cluster culture stem cells and organoids, the operation is simple, compact fused monolayer endoderm cells are formed, non-directional differentiation of the stem cells can be inhibited, and the formed organoids are thick in vesicle wall and are in a solid shape. And the obtained product is a differentiated mature organ and can be used for high-throughput drug screening, drug toxicity testing and regenerative medicine.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.

A recording method of inkjet printing an aqueous inkjet ink on an absorbent medium, the method comprising the steps of: a) transporting the absorbent medium in a transport direction, the medium having a width oriented transverse to the transport direction; and b) adhering a pretreatment liquid at least partially across the width of the absorption medium to form a layer having a thickness of from 1 to 5 [mu] m, the pretreatment liquid comprising water, a fixative, a hydrophilic binder selected from the group consisting of polyvinyl alcohol (PVOH) or modified polyvinyl alcohol, water dispersible ethylene vinyl alcohol (EVOH), a polysaccharide, and a surfactant. Comprising cellulose, a cellulose derivative, CMC, starch, a starch derivative and a combination of two or more of the cellulose, the cellulose derivative, the CMC, the starch and the starch derivative, and the viscosity of the pretreatment liquid is 40-300 mPa.s; and c) applying an aqueous inkjet ink to the layer by ejecting the ink from an inkjet head to form an image, the ink comprising a pigment, a water-soluble organic solvent; and d) drying the layer and the applied inkjet ink by applying heat and airflow to the image.

A binder for a secondary battery positive electrode contains a carboxyl group-containing crosslinked polymer or a salt thereof, and a cellulose derivative.

The present invention aims to provide a multilayered cosmetic with high emulsion particle stability, particularly high high-temperature stability and freeze-thaw stability, and rapid separation of the emulsion layer from the aqueous layer. This solution is achieved by providing a multilayered cosmetic comprising: (A) one or more nonionic surfactants having a weighted average HLB value of 8.5 or greater; (B) an ionic surfactant; (C) one or more cellulose derivatives selected from alkylcelluloses and hydroxyalkylcelluloses; (D) an oily component; and (E) water.

An object of the present invention is to provide a composition having excellent surface impact strength and a method for producing a composition. The composition according to the embodiment of the present invention is a composition containing a cellulose derivative and a polyrotaxane, and is amorphous.

This invention provides a covalent organic framework hybrid matrix membrane, its in-situ growth method, and its application in ion separation. The method includes: dissolving cellulose derivatives, aldehyde monomers of covalent organic frameworks, and amine monomers of covalent organic frameworks in an organic solvent to obtain a first solution, a second solution, and a third solution; mixing acetic acid solution with the first, second, and third solutions to obtain a homogeneous casting solution; and drop-coating the homogeneous casting solution for in-situ growth. This invention constructs a CD@COF hybrid matrix membrane based on a cellulose derivative matrix and a low-loading covalent organic framework filler using an in-situ growth method. The prepared hybrid matrix membrane exhibits good interfacial compatibility between the matrix and the filler. The above-mentioned hybrid matrix membrane preparation process is simple, possesses good mechanical strength and high scalability, and demonstrates high ion flux and excellent ion selectivity for separating monovalent and divalent ions. It has broad application prospects in wastewater resource treatment, lithium extraction from salt lakes, and energy storage.

In this ethyl cellulose derivative, some of hydroxy groups of ethyl cellulose are substituted with one or more groups selected from an acetyl group, a propionyl group, and a butyryl group. A value obtained by dividing the Young's modulus MPa of the ethyl cellulose derivative by the specific surface area m2 / g is 50.0 or less.

Provided is a polishing composition which, in a composition containing a cellulose derivative, can maintain low haze and has excellent defect reduction properties. The present invention can provide a polishing composition containing a cellulose derivative and a basic compound. The weight-average molecular weight (Mw) of the cellulose derivative is less than 80,000.

This application provides a modified cellulose thickener for fracturing fluid, fracturing fluid, and preparation method thereof, relating to the field of oil and gas extraction technology. This application utilizes a cellulose derivative obtained by grafting carboxymethyl cellulose with a biaminopolysiloxane as a thickener. Compared to hydroxypropyl cellulose and carboxymethyl cellulose, this cellulose derivative exhibits higher heat and shear resistance, good swelling properties, and low residue content, reducing damage to formations.