254 results about "Cellulose derivatives" patented technology

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 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.

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.

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.

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.

A cellulose composition for sealing around a stoma, an ostomy device or an accessory for an ostomy device comprising the composition, and a method for sealing around a stoma. The composition comprises a continuous phase and a discontinuous phase, with the continuous phase comprising a cellulose derivate material and a plasticizer and the discontinuous phase comprising an absorbent material. The cellulose derivate material is soluble in the plasticizer, and the composition comprises 15-40% (w / w) cellulose derivative material, 10-30% (w / w) plasticizer; and 40-70% (w / w) absorbent material.

The present invention relates to a film and a capsule which do not contain titanium oxide and which have light-blocking properties and improved mechanical strength. The film and capsule are produced using a composition comprising a film-forming polymer and a whitening agent. The film-forming polymer is selected from the group consisting of cellulose derivatives, gelatin, and pullulan. The whitening agent comprises a salt and a surfactant, wherein the salt is sodium sulfate or a combination of sodium sulfate and a white pigment, wherein the white pigment is not titanium dioxide. The light-blocking film and capsule having improved mechanical strength are obtained by molding the composition into a film and a capsule, respectively, and then drying the film and capsule at 55°C or lower.

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.

To provide a tablet that is easy to swallow and also has reduced production cost, and a method of producing the same.SOLUTION: A tablet has a naked tablet containing a gelator, and at least one selected from sugar alcohol, monosaccharide, disaccharide, oligosaccharide, cellulose, cellulose derivative, starch, starch derivative and starch decomposition product. Preferably, the gelator is at least one selected from xanthan gum, locust bean gum, guar gum, mannan, glucomannan, hyaluronan, agar, alginic acid, tamarind gum, psyllium seed gum, tara gum, carrageenan, acacia gum, gum arabic, ghatti gum, tragacanth gum, karaya gum, cassia gum, rhamsan gum, welan gum, macrophomopsis gum, curdlan, pullulan, gellan gum, pectin, and soybean polysaccharide, gelatin, collagen, polyglutamic acid, polylactic acid, polyglutamic acid and the like.SELECTED DRAWING: None

The invention discloses a reinforcing and protecting material for paper cultural relics and application of the reinforcing and protecting material. According to super-hydrophobic treatment liquid, silicon dioxide nanoparticles are modified through a silane coupling agent and a perfluoroalkyl trialkoxysilane coupling agent, an extremely low surface energy layer is constructed, and water is effectively prevented; the reinforcing treatment liquid adopts cellulose derivatives to form a hydrogen bond network with paper cellulose, so that the mechanical strength is remarkably improved. The hydrophobic property and the mechanical property are kept stable after dry-heat and damp-heat accelerated aging, and long-term preservation of cultural relics is facilitated. The design of the coating follows the principle of reversibility, the super-hydrophobic layer and the reinforcing layer are microcosmically firm and macroscopically integrally stripped, the super-hydrophobic layer and the reinforcing layer can be removed in a lossless mode through absolute ethyl alcohol and other mild solvents, the surface of the paper is restored to be close to the state before treatment, and a base material is not damaged or the appearance of the base material is not changed.

The application belongs to the technical field of material synthesis, and discloses an environmentally-friendly eutectic cellulose quasi-solid electrolyte capable of in-situ thermal polymerization and a preparation method thereof, which comprises the following steps: forming a deep eutectic electrolyte by mixing a metal sodium salt and 1,2-dimethyl imidazole according to different molar ratios; preparing a double bond functionalized modified cellulose derivative through an addition reaction in an organic solvent system; dissolving the double bond modified cellulose derivative in the deep eutectic electrolyte to prepare a precursor solution; and finally constructing a quasi-solid electrolyte in-situ in a battery through a thermal polymerization method. The application provides an environmentally-friendly eutectic cellulose quasi-solid electrolyte, which provides a new idea for solving the safety hidden danger of new energy vehicles.

The invention discloses a general secondary amine molecular cage-nanocellulose composite chiral stationary phase for positive and negative phases as well as a preparation method and application of the general secondary amine molecular cage-nanocellulose composite chiral stationary phase. A secondary amine molecular cage (RCC3-R) modified silica gel is used as a substrate, a nano cellulose derivative (NCDMPC) is loaded through a coating method to prepare two chiral stationary phases (CSP-1 and CSP-2), and aminopropyl silica gel is used as a substrate to prepare a control chiral stationary phase (CSP-3). By utilizing the three-dimensional cavity screening effect of RCC3-R and the synergistic effect of an NCDMPC chiral spiral skeleton, the common use of normal phase and reversed phase chromatography modes is realized, and the chiral recognition and separation performance is superior to that of CSP-3. 15 chiral compounds can be split in a normal-phase mode, 12 chiral compounds can be split in a reverse-phase mode, excellent splitting performance on alcohols, amines and chiral drugs is shown, a novel material can be provided for efficient separation of complex systems such as chiral drugs and pesticides, and the application prospect is wide.

This invention relates to a process for manufacturing hot stamping foil for cigarette tipping paper. The process involves preparing a base film layer, release layer, color layer, plating layer, and adhesive layer using biodegradable materials. The base film is prepared by mixing polylactic acid with a cellulose derivative. A wax-based release agent is then coated onto the base film to form the release layer. Next, a water-based pigment is coated to form the color layer. A thin aluminum plating layer is formed using vacuum evaporation. Finally, a biodegradable adhesive is coated to form the adhesive layer. The hot stamping foil obtained by this process is suitable for cigarette tipping paper, possessing certain degradation properties and hot stamping adhesion. The manufacturing process includes raw material preparation, coating, and drying steps, and is applicable to the cigarette packaging industry.

This invention provides a temperature-sensitive, environmentally friendly microcapsule and its preparation method, relating to the field of polymer materials. The microcapsule is composed of chitosan, cellulose derivatives, gelatin, and dopamine. The microcapsule can achieve different cross-linking structures depending on the component ratios, and can controllably release the core substance within a temperature range of 90-150℃. The materials provided by this invention eliminate toxic reagents, and the microcapsules are all environmentally friendly materials, causing no environmental pollution. The microcapsule preparation method is characterized by temperature sensitivity and controllability, being green, environmentally friendly, and pollution-free, with a simple preparation method suitable for large-scale industrial production. Utilizing temperature-sensitive, biodegradable, and comprehensively environmentally friendly materials, it has broad application prospects in catalyst coating, drug coating, and other fields, meeting the needs of multiple sectors.

The invention relates to cellulose derivative matrigel and application thereof in a tumor CDX or PDX model, the cellulose derivative matrigel is a ready-to-use hydrogel free of animal-derived components, can be used for constructing an efficient and stable tumor CDX or PDX model, is simple to operate, has high similarity with clinical tumors, and can be used for preparing the tumor CDX or PDX model. And a solution is provided for clinical curative effect prediction and preclinical research.

Described in several exemplary embodiments herein are cellulose derivatives and amorphous solid dispersions thereof that can contain one or more agents, optionally one or more poorly soluble agents.