189 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 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.

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

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.

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.

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.

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.

The objective is to provide compositions and the like for manufacturing tablets with excellent sustained-release properties, high tablet hardness, and excellent tablet moldability by direct compression. [Solution] The present invention relates to a direct-compression tablet composition containing (A) a cellulose derivative and (B) a polyhydric phenol compound having 1 to 20 structures in the molecule having two or more hydroxyl groups directly attached to an aromatic ring. The present invention also relates to a pharmaceutical composition containing (A) a cellulose derivative, (B) a polyhydric phenol compound having 1 to 20 structures in the molecule having two or more hydroxyl groups directly attached to an aromatic ring, and (C) a pharmaceutically active ingredient, wherein the mass-based ratio of the content of the pharmaceutically active ingredient (C) to the content of the cellulose derivative (A) and the polyhydric phenol compound (B) is 0.01 to 10, and the mass-based ratio of the content of the cellulose derivative (A) to the content of the polyhydric phenol (B) is 60 / 40 to 99 / 1.

The invention discloses nanoscale fluorescent electrostatic spinning and a preparation method thereof, and particularly relates to the technical field of high-performance fiber products, and the nanoscale fluorescent electrostatic spinning comprises a flexible supporting layer and an electrostatic spinning nanofiber layer. According to the nanoscale fluorescent electrostatic spinning yarn and the preparation method thereof, an electrostatic spinning process based on cellulose acetate and other cellulose derivatives is adopted, so that good biocompatibility, degradability and film-forming property of a cellulose material are utilized; the problems of uniform dispersion and high-load compounding of the inorganic fluorescent powder in a high-molecular-weight cellulose solution are successfully solved, and the conduction efficiency and distribution uniformity of stress are remarkably improved. Experiments show that the force sensitivity of the prepared electronic skin device reaches 10.5 mV / MPa or above, the pressure threshold value is reduced to 380 kPa or below, the response time does not exceed 15 ms, the sensitivity is improved by 30% or above compared with that of a device prepared through a traditional coating method, and the requirement for high-precision touch sensing can be met.

To provide a cellulose derivative capable of forming a liquid crystal film with novel polarization properties.SOLUTION: A cellulose derivative comprises hydroxy groups, with some of the hydroxy groups being substituted with groups having unsaturated double bonds and alkyl groups.SELECTED DRAWING: None

The invention relates to a composition for providing barrier properties for a cellulosic fibre web, such as paper, board or the like. The coating composition comprises microfibrillated non-wood biomass, having a particle size D90<250 μm and particle size D50<100 μm, which microfibrillated non-wood biomass comprises at least 5 weight-% of a hemicellulose fraction and / or pectin, calculated from the dry weight of the microfibrillated non-wood biomass; an auxiliary agent comprising at least one cellulose derivative, and / or a synthetic binding agent, such as polyvinyl alcohol or polystyrene acrylate copolymer.

The invention provides an industrial lignin environment-friendly adhesive as well as a preparation method and application thereof. According to the mass percentage content, the lignin-cellulose composite material comprises 1.8-7.2% of industrial lignin, 1.8-3.6% of cellulose derivatives, formic acid aqueous solution and the balance of water, wherein the total mass percentage content is 100%; the content of formic acid in the adhesive is 24-48%; the total solid content of the industrial lignin and the cellulose derivative is 3.6-10.8%; the raw materials are uniformly mixed by stirring to obtain a uniform and stable dark viscous liquid, namely the lignin environment-friendly adhesive. The technical problem to be solved is how to prepare the environment-friendly industrial lignin adhesive which does not contain formaldehyde and phenol substances and is healthy and environment-friendly, and a pure biomass system is constructed by taking a papermaking byproduct industrial lignin (waste) and a natural cellulose derivative as core raw materials so as to realize high-value utilization of resources. Meanwhile, the preparation process of the adhesive can be completed at normal temperature and normal pressure, excellent bonding strength can be achieved through mild hot pressing when the adhesive is used for bonding wood, and the water resistance is good.

The invention is directed to a composition suitable for a fertilizer, a method of making the composition, and use of the composition. The composition comprises one or more fertilizer nutrients, an organic material, and a carbon source, wherein the organic material comprises one of more of lignin, cellulose, or cellulose derivatives and the carbon source comprises one or more of char, activated carbon, carbon black, biochar, or coal.

This invention relates to a cellulose-based hydrogel and its preparation method. The raw materials for preparation include a first cellulose derivative, a second cellulose derivative, and a crosslinking agent. The viscosity of the first cellulose derivative in a 1 wt% aqueous solution at 25°C is 3000–6000 cps, and the viscosity of the second cellulose derivative in a 2 wt% aqueous solution at 25°C is 30–700 cps. The first cellulose derivative comprises 70%–95% of the total mass of the first and second cellulose derivatives. The above-mentioned cellulose-based hydrogel uses first and second cellulose derivatives with different viscosities within a specific viscosity range as the main crosslinking raw materials, while simultaneously controlling the mass content of the first cellulose derivative. These, along with the crosslinking agent, are used as raw materials for crosslinking reactions. This eliminates the need for additional chemical modification of the cellulose derivatives by introducing other chemical reagents, thus obtaining a cellulose-based hydrogel with both high water absorption and storage modulus.

This invention discloses a chemical mechanical polishing slurry for silicon wafers based on the synergistic effect of ternary polymers, comprising the following components by weight percentage: silica sol 5-15 wt%; polyethylene glycol 0-10 wt%; cellulose derivative 0-0.5 wt%; sorbitol 0-0.5 wt%; oxidant 0.5-1.5 wt%; pH adjuster 0.3-0.8 wt%; and deionized water as the balance. Through the precise proportioning and synergistic effect of the ternary system, this polishing slurry achieves multi-coupling optimization, including abrasive stabilization, shear thickening, and chemical complexation. While ensuring high material removal rates, it significantly reduces surface defects and metal contamination, meeting the surface polishing requirements of advanced silicon wafer processes. Furthermore, the formulation of this polishing slurry is environmentally friendly, consisting of water-soluble polymers or biodegradable materials, greatly reducing environmental burden and simplifying post-processing steps, making it easy for industrialization and promotion.