209 results about "Cellulose acetate" patented technology

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The application relates to the technical field of batteries, in particular to a composite solid electrolyte membrane and a preparation method and application thereof. The composite solid electrolyte membrane comprises the following layers which are sequentially stacked: a first membrane layer comprising a polymer, a solid electrolyte and a lithium salt; a second membrane layer comprising a polymer, a solid electrolyte and a lithium salt; and a third membrane layer which is an interface layer; wherein the solid electrolyte and the lithium salt content of the second membrane layer are higher than those of the first membrane layer, and the polymer is formed by polymerization of raw materials comprising triacetyl cellulose (TCA) and polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP). The composite solid electrolyte membrane has improved high-temperature resistance and good ion transmission performance.

The invention discloses a self-powered flexible sensor and a preparation method thereof, and belongs to the field of electronic skin, man-machine interaction, flexible electronic devices and sensors. The invention relates to a cellulose acetate-based ionic gel self-energized flexible sensor which is prepared from cellulose acetate, ionic liquid, a polymer monomer, a cross-linking agent and an initiator and has good mechanical property and antibacterial property, the cellulose acetate enhances the mechanical property of the gel through non-covalent crosslinking, and the ionic liquid plays a conductive role. The flexible sensor has good conductivity, high sensitivity and stability, and can be stretched, twisted and bent. Meanwhile, the high transparency and excellent biocompatibility can be realized, so that the electronic skin can be used as the electronic skin for multifunctional perception and integrated application. The material is environment-friendly, the preparation method is simple, the operability is high, the application field is wide, and the prospect is wide.

The invention relates to the technical field of pharmaceutical preparations, and discloses a high-drug-loading risperidone sustained release microsphere for subcutaneous injection and a preparation method thereof, and the preparation method comprises the following steps: mixing risperidone, polylactic acid and dichloromethane to obtain an oil phase; dissolving a pore-forming agent in water to obtain a pore-forming agent solution; mixing polyvinyl alcohol, sodium chloride and water to obtain a water phase; mixing the oil phase with the pore-forming agent solution to obtain primary emulsion; mixing and stirring the primary emulsion and a water phase until dichloromethane is completely volatilized to obtain microspheres loaded with speridone; mixing cellulose acetate, polyethylene glycol and an organic solvent to obtain a coating solution; and coating the risperidone-loaded microspheres with a coating solution to obtain the high-drug-loading risperidone sustained-release microspheres capable of being used for subcutaneous injection. According to the invention, the efficient drug loading is realized, the injection comfort is improved, the slow permeation and release of the drug are realized, and the onset speed and the long-acting treatment demand are balanced.

The application discloses an electronic skin-oriented conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the electronic skin-oriented conductive silver paste include flaky silver powder, silver nanoparticles, thermoplastic polyurethane elastomer, acrylic elastomer, PEDOT:PSS microgel dispersion, (3-glycidylpropoxy)trimethoxysilane, polydiallyldimethylammonium chloride, hexanedial modified dopamine copolymer, (3-aminopropyl)triethoxysilane, methacryloyloxypropyltrimethoxysilane, cellulose acetate, modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol ether acetate, dibasic acid ester, leveling agent and water.The electronic skin-oriented conductive silver paste has the advantages of good electrical performance, good mechanical-electrical stability, good anti-electromigration and sweat corrosion resistance, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias, and is suitable for electronic skin.

The invention discloses an HPCACM-coated Co3O4 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing rice straw source cellulose; preparing rice straw source cellulose acetate (CA); preparing a hollow porous cellulose acetate fiber membrane (HPCAFM); preparing a hollow porous cellulose acetate derived carbon fiber membrane (HPCACM); and preparing the HPCACM-coated Co3O4 composite material. The prepared HPCACM-coated Co3O4 composite material is prepared based on straw, has a high specific surface area and a unique micro-mesoporous hierarchical structure, provides a rich active interface for a catalytic reaction, is beneficial to promoting mass transfer of reactants and products, efficiently activates potassium hydrogen persulfate, realizes high-value utilization of agricultural wastes, and improves the water pollution treatment efficiency.

This invention provides a rapid preparation method for steel samples for transmission electron microscopy (TEM), relating to the field of physical analysis of steel materials. It is applied to the preparation of various steel samples, including heat-sensitive steels, using a composite binder of cellulose acetate, acetone, silica, and alumina. The binder is used to adhere one side of a wire-cut steel sample sheet to the sheet fixing surface of a grinding aid. A grinding aid area, parallel to the bottom surface of the sheet fixing surface, is provided on the grinding aid device. The grinding aid area is pressed, and sandpaper with progressively increasing grit is used to grind one side until a first preset thickness is reached. Then, the other side is switched, and sandpaper with progressively increasing grit is used to grind the second side until a second preset thickness is reached. The ground sheet is removed, thinned, punched, and electropolished to obtain the target steel sample. This invention can rapidly prepare steel sample sheets with a thickness of 30-50 µm, and the method is simple and has a high success rate.

The invention relates to a method for preparing cellulose acetate based on a micro-flow field technology. Dissolving the cellulose raw material in the ionic liquid to obtain a cellulose solution, and mixing the supported protonic acid catalyst and the cellulose solution to obtain a material A; the esterifying agent is marked as a material B; and respectively pumping the material A and the material B into a micro-flow field reactor for esterification reaction to obtain the cellulose acetate. According to the method, a micro-flow field reaction technology is innovatively adopted, and a new green and continuous cellulose acetate synthesis path is constructed through high-efficiency mixing and mass (heat) transfer reinforcement under a micro scale and precise control of a cellulose acylation reaction.

Disclosed are improved methods for inspecting tow for contamination, defects, and / or imperfections, for example cellulose acetate tow. The present disclosure can also relate to processes for producing cellulose acetate tow that involve detecting and analyzing contamination, defects, and / or imperfections in the tow. The methods can result in cellulose acetate that has fewer contamination, defects, and / or imperfections than has been previously achieved.

The invention discloses a production process of a cellulose acetate fiber fabric containing natural fragrance, a solvent formed by mixing a modified polymer, 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide, a modified microcapsule and dimethylformamide is subjected to dry spinning to prepare the cellulose acetate fiber fabric, and the weight part ratio of the modified polymer to the modified microcapsule is (70-80): (6-8). The preparation method comprises the following steps: by taking an isocyanate group on excessive hexamethylene diisocyanate as a reaction site, firstly reacting with an intermediate containing dihydroxyl, and then reacting with cellulose acetate containing free hydroxyl, so as to prepare the modified polymer. The halamine structure on the molecular chain can destroy cell membranes, enzyme systems or genetic materials through oxidation. The modified capsule has a lavender essential oil and cinnamon essential oil double-component double-capsule-wall structure, the fragrance durability can be improved, the copper sulfide nanoparticles and quaternized chitosan structures can destroy the bacterial cell structure, and the antibacterial performance of the material is improved.

The invention discloses a cellulose diacetate tube and a melt extrusion formula, method and application thereof. The cellulose diacetate tube comprises cellulose diacetate, glycerol triacetate, polyethylene glycol, an antioxidant and a whitening agent. The cellulose diacetate tube is prepared from 50-80 parts by mass of cellulose diacetate, 10-30 parts by mass of glycerol triacetate, 5-30 parts by mass of polyethylene glycol, 0.1-2 parts by mass of an antioxidant and 0.1-5 parts by mass of a whitening agent. The cellulose diacetate tube prepared from the formula, the method and the application can meet the whiteness and hardness standards of filter tubes for cigarettes.

The present application discloses foamable compositions comprising cellulose acetate and a combination of a carbon dioxide as a physical blowing agent and a chemical blowing agent. The foamable compositions are used to prepare foams that exhibit lower density, lower average foam cell size, and fewer corrugations than foams made only by carbon dioxide.

Antifog compositions comprising a primary film with opposing principal flat surfaces and a central coplanar region, and processes for manufacturing such compositions. The central coplanar region is located between the opposing principal flat surfaces. The primary film comprises cellulose acetate, a plasticizer, and an antiblocking agent. The antiblocking agent has an average particle size ranging from 0.02 microns to 6 microns. The cellulose acetate exhibits a degree of substitution that increases from the opposing principal flat surfaces toward the central coplanar region, or remains practically constant throughout the thickness of the composition. The composition is formed by saponifying a precursor film to enhance its hydrophilicity.

Disclosed are improved methods for crimping tow and / or measuring the crimp of the tow (e.g., the crimp level and / or uncrimp energy). Also disclosed is tow produced using such methods. The methods can result in tow (e.g., cellulose acetate tow) that has more consistent and precise crimp than has been previously achieved.

The application discloses a hollow paper tube and a preparation method and application of the hollow paper tube as a hollow cooling section of a heating cigarette filter, and belongs to the technical field of novel cigarettes. Inorganic fibers and plant fibers are mixed and beaten to obtain mixed fiber pulp, the mixed fiber pulp is treated by soaking in a sodium hydroxide solution, calcium carbonate, an inorganic adhesive and a retention aid are added and stirred uniformly, and then, screen forming, drying and slitting are sequentially performed to obtain raw paper, and the raw paper is spirally formed and rolled into a hollow paper tube. The hollow paper tube can guarantee the flexibility of paper, has good stiffness and resilience, effectively solves the problem that the paper tube is easily deformed irreversibly when being pressed during compounding with a cellulose acetate filter section, and greatly reduces the loss rate of the hollow paper tube during the compounding process.

Disclosed are improved methods for inspecting tow for contamination, defects, and / or imperfections, for example cellulose acetate tow. The present disclosure can also relate to processes for producing cellulose acetate tow that involve detecting and analyzing contamination, defects, and / or imperfections in the tow. The methods can result in cellulose acetate that has fewer contamination, defects, and / or imperfections than has been previously achieved.

The present application relates to lyocell material, filters for smoking articles comprising the lyocell material and smoking articles. The lyocell material and filters for smoking articles of the present application can replace conventional cellulose acetate material and filters for smoking articles comprising the cellulose acetate material.

The present disclosure relates to lyocell material and filters for smoking articles and smoking articles comprising lyocell material. According to the present application, lyocell material and filters for smoking articles can replace conventional cellulose acetate material and filters for smoking articles comprising the same.

The invention discloses a full 3D printing flexible force sensor based on a composite piezoelectric film and a preparation method thereof, and the method comprises the steps: adding prepared PDA-coated BTO nanoparticles into cellulose acetate CA powder, and further preparing a PDA-coated BTO / CA precursor mixed solution; a PDA (at) BTO / CA precursor mixed solution is printed on the surface of the PI thin film loaded with the lower electrode layer to form a composite piezoelectric thin film, an extensible S-shaped lower electrode, the composite piezoelectric thin film, a lower spacing layer, an extensible S-shaped upper electrode, an upper spacing layer, an upper link electrode layer and a bonding packaging layer are sequentially printed and packaged, and the full 3D printing flexible force sensor is obtained. According to the invention, the compatibility and dispersity between the composite piezoelectric film polymer base material cellulose acetate and the piezoelectric ceramic nanoparticles are obviously improved. Therefore, the flexible piezoelectric sensor has high sensitivity, high piezoelectric performance, high dielectric constant and good temperature stability.

The invention discloses a high-performance low-carbon electrode material based on cigarette end recycling and preparation and application thereof, and relates to the technical field of waste cigarette end recycling and electrode materials. The invention particularly relates to a green method for preparing a high-performance low-carbon electrode material by using waste cigarette ends and an energy storage application of the electrode material in a supercapacitor. Cellulose acetate in cigarette ends is converted into a porous carbon material with a high specific surface area through ultrasonic microwave co-processing, gradient carbonization and plasma activation technologies, and efficient preparation and cyclic utilization of an electrode material are realized by combining a natural template modification process.

The invention relates to the technical field of cigarette filter stick paper, in particular to paper filter stick paper for cigarettes and a preparation method thereof, and the paper filter stick paper comprises the following raw materials in parts by weight: 250-300 parts of water, 35-40 parts of a first base material, 30-35 parts of a second base material, 6-8 parts of glycerol, 2-3 parts of triethyl citrate, 8-12 parts of aluminum hydroxide, 2-4 parts of citric acid and 8-12 parts of an additive. According to the invention, the corn starch selectively oxidized by sodium periodate is used as a first base material, and the bamboo pulp fiber subjected to fine treatment is used as a second base material, so that the traditional cellulose acetate is completely replaced, the biodegradation rate of the filter stick in the environment is obviously accelerated, and the pollution problem caused by material inertia is fundamentally solved.

The invention belongs to the field of pharmaceutical preparations, and particularly relates to an acetate fiber thermoplastic coating film as well as preparation and application thereof. The cellulose acetate thermoplastic coating film is prepared by thermoforming cellulose acetate, triethyl citrate and polyethylene glycol which are uniformly mixed as raw materials. The preparation process is high in automation and scale degree, low in environment and equipment requirements, green and environment-friendly, capable of reducing loss and suitable for industrial production. The sustained and controlled release preparation prepared from the cellulose acetate fiber thermoplastic coating film has a good sustained and controlled release effect, and a new coating direction is provided for preparation of the sustained and controlled release preparation.

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.

The application belongs to the technical field of filter materials, and particularly relates to a composite nanofiber material, a preparation method and application thereof. The application discloses a composite nanofiber material, which is prepared from a spinning solution through electrostatic spinning, and the spinning solution comprises the following raw material components by weight: polylactic acid: 5-30 wt%, cellulose acetate: 5-30 wt%, a surfactant: 0.001-1 wt%, a conductivity regulator: 0.001-0.5 wt%, and a solvent: 60-90 wt%. By adding cellulose acetate, the surfactant and the conductivity regulator, the heat resistance and the filtration performance of the composite nanofiber material are improved. The prepared composite nanofiber material has good biodegradability, good heat resistance, good filtration performance, natural antibacterial property, low cost and simple operation, and is suitable for large-scale production.

The invention discloses a method for detecting cellulose diacetate acetone slurry insoluble substances (AIS). The method comprises the following steps: preparing a composite solution; dissolving an AIS sample in the composite solution; a nuclear magnetic resonance spectrometer (NMR) is adopted to measure the sample. The method provided by the invention can realize complete dissolution and structural analysis of AIS under mild conditions, and is suitable for dissolution and rapid structural detection of cellulose diacetate acetone slurry insoluble substances with different raw material sources.

The utility model discloses a kind of heating reaction kettle convenient to feed, it is related to cellulose diacetate processing technical field, including base and discharging assembly, main kettle body is installed in the middle of base upper end, and main kettle body left side lower end is provided with discharge gate, and main kettle body upper end is provided with top cover, top cover upper end both sides are provided with discharging assembly, and discharging assembly includes ration cylinder, servo motor, feed auger, feed inlet, feed pipe and ration pump, servo motor is installed in the middle of ration cylinder upper end, and feed auger is connected in the front end of servo motor, feed inlet is provided in the left side upper end of ration cylinder, feed pipe is provided in the right side of top cover upper end, and ration pump is connected in the front end of feed pipe, mixing assembly is arranged in the inside of main kettle body.The heating reaction kettle convenient to feed can be accurately rationed according to the processing of cellulose diacetate, while improving the overall practicality of heating reaction kettle, avoid processing to be influenced.

An aerosol-generating article for generating an aerosol upon heating is provided, the article including: an aerosol-generating element including a rod of aerosol-generating substrate circumscribed by a wrapper; a downstream section provided immediately downstream of the element and extending from a downstream end of the element to a downstream end of the article; an upstream section provided immediately upstream of the element and extending from an upstream end of the element to an upstream end of the article, the upstream section including an upstream element formed from a tow of cellulose acetate fibres; pieces of a flavour material combined into the tow, the flavour material including: a polysaccharide matrix structure including gellan gum and emulsifier, and a flavourant formulation dispersed within the matrix structure, and the flavourant formulation being at least partly trapped within the matrix structure and releasable from the matrix structure upon heating of the flavour material.

The application discloses a TAC composite film and a preparation method thereof, and belongs to the technical field of optical films. The TAC composite film comprises a modified TAC base film and a functional protective coating. The modified TAC base film is prepared by casting a triacetate cellulose solution into a film. According to mass fractions, the triacetate cellulose solution comprises the following raw materials: 20 parts of triacetate cellulose, 1-2 parts of mercapto-esterified cellulose, 0.1-0.3 parts of a plasticizer, 0.1-0.4 parts of an ultraviolet absorber and 80-100 parts of a mixed solvent. The functional protective coating is obtained by light curing after coating of a coating slurry. According to mass fractions, the coating slurry comprises the following raw materials: 30 parts of a light-cured acrylate prepolymer, 4-8 parts of alkenyl quaternary ammonium cellulose, 0.5-1.5 parts of a photoinitiator and 40-50 parts of a solvent. The application adds mercapto-esterified cellulose to the base film and adds alkenyl quaternary ammonium cellulose to the coating, so that the interfacial bonding force is enhanced through chemical action.