719 results about "Cellulose acetate" patented technology

The invention relates to the technical field of solid-state lithium batteries, in particular to a cellulose acetate modified PEO-based solid-state electrolyte membrane, a solid-state lithium battery and a preparation method thereof.The preparation method comprises the steps that lithium bis (trifluoromethanesulfonyl) imide, cellulose acetate and polyethylene oxide are dissolved in a solvent, and a mixed solution is obtained; and curing the mixed solution in a mold to obtain the cellulose acetate modified PEO-based solid electrolyte membrane. According to the invention, the cellulose acetate is introduced to modify the polyethylene oxide solid electrolyte, and the prepared cellulose acetate modified PEO-based solid electrolyte membrane can generate a stable solid electrolyte interface rich in Li2O and LiF on the surface of a lithium negative electrode in situ in the application of a solid lithium battery, so that the growth ability of lithium dendrites is effectively inhibited, and the performance of the lithium battery is improved. The interface impedance is reduced, and the operating temperature range of the solid-state lithium battery is widened.

The invention discloses a preparation method of a degradable transparent conductive polymer film, and belongs to the technical field of film preparation. Preparing dispersion liquid I through graphene oxide quantum dots; preparing a dispersion liquid II from polyaniline nanofibers; dissolving pyrrole and toluenesulfonic acid in N, N-dimethylformamide to prepare a reaction solution, adding the dispersion liquid I and the dispersion liquid II, stirring, and adding ferric chloride hexahydrate to obtain a reaction solution; adjusting the pH value of the reaction solution to 1.5, and heating to obtain a polypyrrole solution; preparing cellulose acetate, polyvinyl alcohol and N, N-dimethylformamide to obtain a cellulose acetate solution; mixing the polypyrrole solution and the cellulose acetate solution, adding glutaraldehyde to obtain a mixed solution, and pouring the mixed solution into a mold to prepare a composite wet film; and putting the composite wet film into a hot-pressing forming machine for hot-pressing to generate the polymer film. The conductive polymer film prepared by the invention can be applied to the fields of supercapacitor electrode materials, electromagnetic shielding materials, flexible sensors and the like, and provides a new high-performance material choice for the development of related fields.

The invention relates to the technical field of concrete, and provides high-strength asphalt concrete and a preparation method thereof.The asphalt concrete is prepared from, by weight, 18-24 parts of asphalt, 8-16 parts of cement, 80-100 parts of gravel, 20-30 parts of cellulose ester derivatives, 40-50 parts of medium sand and 50-60 parts of mineral fine powder; the cellulose ester derivative comprises cellulose acetate phthalate and cellulose acetate, and the weight ratio of the cellulose acetate phthalate to the cellulose acetate is (1: 9)-(9: 1). According to the technical scheme, the problem of poor mechanical property of asphalt concrete in related technologies is solved.

The invention discloses a preparation method of a cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel composite pressure sensing material. The preparation method comprises the following steps: (1) preparing a cellulose acetate and thermoplastic polyurethane spinning solution; (2) preparing a cellulose acetate / thermoplastic polyurethane composite nanofiber membrane; (3) preparing cellulose acetate / thermoplastic polyurethane short nano dispersion liquid; (4) preparing a cellulose acetate / thermoplastic polyurethane / polypyrrole polymerization solution; and (5) preparing the cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel. According to the preparation method, a high-temperature thermal annealing process is not needed, and the prepared nanofiber composite aerogel has high conductivity, ultralow volume density, high compression deformation performance and high pressure resistance sensing sensitivity.

The invention belongs to the technical field of polymeric membrane materials, and particularly discloses a polycarbonate / cellulose acetate blended ultrafiltration membrane as well as a preparation method and application thereof. The polycarbonate / cellulose acetate blended ultrafiltration membrane is prepared by blending cellulose acetate and polycarbonate, and has the advantages of simple preparation method, low cost, low energy consumption, good stability and the like; meanwhile, the double advantages of polycarbonate and cellulose acetate are combined, remarkable hydrophilic enhancement and efficient permeability are shown, the purpose of separation and purification can be achieved, and the composite material has huge potential application prospects in the fields of seawater desalination, sewage treatment, rainwater collection and treatment and the like.

The invention belongs to the technical field of homogeneous derivatization of cellulose, and discloses a method for homogeneous synthesis of cellulose acetate from cellulose under catalysis of a eutectic solvent. The method comprises the following steps: dissolving cellulose in a deep eutectic solvent to form a homogeneous solution, adding an acylating agent, reacting, and adding an anti-solvent to obtain the cellulose acetate with the substitution degree of 0.42-1.81. According to the method for preparing the cellulose acetate, the solvent synthesis cost is low, the reaction condition is mild, an additional activation or hydrolysis process is not needed before and after the reaction, and the process is simple. The deep-eutectic solvent can be used as a reaction solvent and a reaction catalyst, and a new technology for homogeneous preparation of cellulose acetate is developed. The problems of high solvent cost, complex process operation, high chemical toxicity and high reaction condition requirement in preparation of cellulose acetate are solved.

The invention relates to the technical field of packaging bags, and discloses a moisture-proof medical packaging bag material and a preparation method thereof. The moisture-proof medical packaging bag material comprises a paper layer and a plastic layer, the paper layer comprises modified kraft paper, and the plastic layer comprises the following raw materials in parts by weight: 70-100 parts of polybutylene terephthalate adipate, 30-50 parts of polypropylene carbonate, 5-7 parts of modified mica and 1.5-3 parts of cellulose acetate oleate. The moisture-proof medical packaging bag material prepared by the invention has good water resistance and mechanical properties, also has good degradability, and has a good application prospect.

The invention relates to the field of temperature-adjusting fibers, and particularly discloses a preparation method of a phase-change temperature-adjusting fiber. The phase-change temperature-adjusting fiber is of a core-shell composite structure, a core layer is a lyocell fiber with wood pulp as a raw material, phase-change microcapsules are arranged on the fiber, octadecane serves as a phase-change material, and the phase-change microcapsules are formed by wrapping melamine-formaldehyde resin formed by condensation of melamine and formaldehyde. The outer layer is a shell fiber which is formed by blending polyacrylonitrile and cellulose acetate, the surface of the shell fiber contains structures such as pores, micropores and cracks, and nano titanium dioxide particles capable of absorbing ultraviolet rays are attached to the shell fiber. Experiments prove that the phase-change temperature-regulating fiber not only has a phase-change temperature-regulating function, but also has the effects of ultraviolet resistance, moisture permeability and sweat releasing. The phase-change temperature-adjusting fiber is used as a raw material, and is blended and woven with other fibers to prepare the temperature-adjusting functional fabric.

Glasses frame (1) provided by at least one sheet (4) of optical cellulose acetate fibers, provided with regions containing photochromic pigments and regions free of photochromic pigments, planned to form geometries, patterns, designs and images desired by manufacturers.

The invention discloses a polaroid for brightening sheet roll material compounding. The polaroid comprises a first release film, pressure-sensitive glue, a first cellulose triacetate layer, a polyvinyl alcohol layer, a second cellulose triacetate layer, a special functional layer and a second release film, the polyvinyl alcohol layer is positioned between the first cellulose triacetate layer and the second cellulose triacetate layer; the first release film covers the surface of one side of the first cellulose triacetate layer through pressure-sensitive glue; the special functional layer is coated on the surface of one side of the second cellulose triacetate layer, the second release film covers the special functional layer, and the special functional layer is prepared from an azobenzene side chain type liquid crystal polymer or a polymer stable liquid crystal material. According to the invention, the direct on-line roll-to-roll composite production of the polaroid roll material and the brightness enhancement film roll material is realized, additional manual slitting, splicing and material receiving procedures are not needed, and the product yield and the production efficiency are greatly improved.

The invention discloses environmentally degradable plastic as well as a preparation method and application thereof, and belongs to the technical field of degradable plastic. The degradable modified plastic is prepared from the following raw materials: polylactic acid, poly (butylene terephthalate)-adipate, modified thermoplastic starch, modified cellulose, poly (butylene succinate), epoxidized soybean oil, polyvinyl alcohol, glycerol monolaurate and ethylenediaminetetraacetic acid. Wherein the modified thermoplastic starch is obtained by thermoplastic modification of starch through a plasticizer and modification of castor oil and toluene diisocynate; the modified cellulose is obtained by modifying cellulose acetate with chitosan. By regulating and controlling the types and proportions of the raw materials for preparing the plastic, the plastic with excellent degradation performance and mechanical performance can be obtained, the shopping bag is prepared from the plastic, the loading capacity can be remarkably improved, the plastic is easily degraded by microorganisms in the environment after being discarded, and environmental pollution is avoided.

The invention discloses a micropore-rich carbon adsorbent and application thereof in separation of mixed gas of sulfur hexafluoride and nitrogen, and the micropore-rich carbon adsorbent is prepared by taking cellulose acetate as a precursor, performing low-temperature pre-carbonization treatment in an inert atmosphere, mixing with KOH, performing high-temperature activation in the inert atmosphere, and finally washing and drying. The carbon adsorbent prepared by a unique two-step method of low-temperature pre-carbonization and high-temperature activation has an extremely high specific surface area (1100-1700m < 2 > / g) and a pore channel structure mainly comprising micropores (the pore diameter is concentrated in 0.5-0.8 nm). The adsorbent shows ultrahigh adsorption capacity (the adsorption capacity can reach 2.83 mmol / g at the temperature of 25 DEG C and the pressure of 0.1 bar) on SF6. The carbon adsorbent disclosed by the invention is simple in preparation method, low in raw material cost and environment-friendly, and has a wide application prospect in the field of SF6 recovery and purification.

The invention relates to the technical field of fresh-keeping film new materials, in particular to a cellulose acetate nanometer fresh-keeping film and a preparation method thereof. Comprising the following steps: 1) adding cellulose acetate into an acetic acid aqueous solution, heating, stirring and dissolving to obtain a cellulose acetate solution; 2) adding a modified quaternary ammonium salt chitosan antibacterial agent into the cellulose acetate solution, and uniformly stirring and mixing to obtain a spinning solution; and (3) sucking the spinning solution into an injector on high-voltage electrostatic spinning equipment, then mounting a spinning needle on the injector sucking the spinning solution, and starting the high-voltage electrostatic spinning equipment to perform electrostatic spinning film formation, so as to obtain the cellulose acetate nano preservative film. The cellulose acetate nano preservative film prepared by the preparation method disclosed by the invention not only has good antibacterial performance, but also has relatively good mechanical strength.

The cellulose acetate resin composition may include: a cellulose acetate having a total degree of acetyl substitution of 1.9 or greater and 2.6 or less; and a plasticizer. The cellulose acetate may have a number average molecular weight of 45000 or greater and a weight average molecular weight of 70000 or greater. The plasticizer may be selected from (1) an ether-based plasticizer in which at least one terminal hydroxyl group of a polyalkylene glycol is etherified, and (2) an ester-based plasticizer in which at least one terminal hydroxyl group of a polyalkylene glycol is esterified. The polyalkylene glycol in the ether-based plasticizer (1) and the ester-based plasticizer (2) may have a degree of polymerization of 3 or greater and less than 10. The plasticizer may not include an aromatic ring in the terminal group.

The invention relates to a paper filter material as well as a preparation method and application thereof. The preparation method of the paper filter material comprises the following steps: S1, preparing flash drying pulp, mercerizing pulp, paper pulp dried in a drying cylinder and water into pulp; s2, carrying out in-pulp sizing on the pulp obtained in the step S1, and then forming, dehydrating and drying to obtain raw paper; and S3, carrying out surface sizing on the raw paper in the step S2 by adopting starch, and drying to obtain the paper filter material. The paper filter material obtained through the preparation method keeps good air permeability and has high bulk, a paper filter tip rod made of the paper filter material serving as a filter element has low suction resistance and good suction resistance stability, an existing cellulose acetate fiber filter tip rod can be replaced, and production cost, environmental protection and suction experience are all considered.

The invention relates to the field of pharmaceutical preparations, in particular to water-free swallowing granules and a preparation method thereof. The water-free swallowing granules provided by the invention comprise drug-containing taste-masking granules and a taste-modifying material, and the drug-containing taste-masking granules are prepared from drug-containing pellets and the taste-masking material; the raw material of the drug-containing pellet comprises an adhesive, and the adhesive is selected from one or more of povidone, hydroxypropyl methylcellulose, methylcellulose, hydroxypropyl cellulose or starch slurry; the weight ratio of the drug-containing pellet to the taste masking material is (2-10): 1; the taste masking material comprises a coating component and an anti-sticking agent, wherein the coating component is selected from one or more of ethyl cellulose, cellulose acetate, cellulose acetate phthalate, cellulose acetate butyrate, hydroxypropyl methyl cellulose phthalate and carboxymethyl ethyl cellulose; the anti-sticking agent is selected from one or two of lauryl sodium sulfate and talcum powder, and the obtained water-free swallowing granules are easy to swallow and good in stability.

The present invention discloses a tofacitinib citrate sustained-release tablet preparation and a preparation method thereof, which belongs to the technical field of pharmaceutical preparations. The sustained-release tablet comprises a double-layer core and a coating layer; the double-layer core comprises a drug-containing layer and a push layer; wherein the drug-containing layer comprises: tofacitinib citrate, an adhesive, polyethylene oxide, a glidant and a lubricant; the push layer comprises: mannitol, an adhesive, red iron oxide, polyethylene oxide, a glidant and a lubricant; the coating layer comprises: cellulose acetate, a pore-forming agent, a plasticizer, water and acetone. The sustained-release tablet preparation of the present invention solves the technical problems existing in the prior art by adopting a double-layer osmotic pump prescription design, adopting non-hygroscopic materials such as mannitol, adopting a standard round tablet design, preparing a sustained-release coating layer without using methanol, and adopting a coating machine for coating and curing.

The invention discloses a preparation process of high-elasticity acrylic fibers, and relates to the technical field of acrylic fibers, the preparation process comprises the following steps: uniformly mixing dried cellulose acetate fibers with polyacrylonitrile, pouring into dimethyl sulfoxide, heating and stirring, spinning to obtain nascent acrylic fibers, and carrying out double-diffusion molding, washing, oiling, drying and curling on the nascent acrylic fibers to obtain the high-elasticity acrylic fibers. The preparation method comprises the following steps: preparing acrylic fibers, soaking the acrylic fibers in an antibacterial solution, drying, coating a flame retardant, drying, curing in silica sol, and finally soaking in a hydrophobic solution to obtain the high-elasticity acrylic fibers. According to the preparation process of the high-elasticity acrylic fiber, ammonium polyphosphate and sodium alginate are compounded to serve as a flame retardant, so that in the combustion process of the fiber, sodium alginate is subjected to thermal decomposition, and a compact carbon layer is formed on the surface of the fiber, so that contact between oxygen and the fiber is blocked, and the flame-retardant effect is achieved; meanwhile, sodium alginate can form a three-dimensional network structure in the fiber, so that the heat resistance of the fiber during combustion is improved.

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 invention provides a low-smoke halogen-free environment-friendly cable material and a preparation method thereof. The invention discloses a cable material. Comprising the following raw materials in parts by weight: 40-48 parts of an ethylene-vinyl acetate copolymer, 20-32 parts of polyethylene resin, 13-18 parts of cellulose acetate fibers, 1-3 parts of epoxidized soybean oil, 2-5 parts of ethylene bis stearamide, 2-5 parts of triethyl citrate, 3-6 parts of polyethylene glycol diacrylate, 3-6 parts of N-hydroxymethyl acrylamide, 8-12 parts of modified nano oxide and 13-18 parts of a flame retardant additive. And 0.1 to 0.6 part of an antioxidant. The cable material disclosed by the invention takes the ethylene-vinyl acetate copolymer, the polyethylene resin, the triethyl citrate, the polyethylene glycol diacrylate, the N-hydroxymethyl acrylamide, the modified nano oxide, the flame-retardant additive and the antioxidant as raw materials, and the tensile strength and the elongation at break of a cable can be effectively improved through the synergistic interaction of the raw materials; the halogen-free flame-retardant cable material does not contain halogen raw materials, has a relatively high flame-retardant effect, releases relatively low smoke during combustion, and has a good application prospect.

The invention discloses an organic-inorganic hybrid fiber for micro-plastic adsorption and a preparation method of the organic-inorganic hybrid fiber. The preparation method comprises the following steps: (1) cleaning waste cellulose acetate for later use; (2) putting into an amine compound solution, adding a glutaraldehyde solution, and reacting; (3) treating in a mixed solution of a polyphenol solution and a Tris-HCl buffer solution; and (4) treating with a mixed solution of a calcium precursor, sodium hydroxide, a phosphorus source and the like to finally obtain the organic-inorganic hybrid fiber. According to the method, the micro-plastic is adsorbed and removed by using waste to treat waste, a theoretical basis and technical support are provided for value-added conversion of bio-based waste into a high-value-added environment-friendly functional adsorption material, and a new thought is provided for development and application of the micro-plastic adsorption material.

The invention provides an infrared shielding flexible composite phase change film and a preparation method thereof. The composite phase change film is a flexible composite film material synthesized by taking a cellulose acetate porous film as a framework and a phase change material as a core material and doping a high-reflectivity nanoparticle material. The preparation method of the composite phase change membrane comprises the following steps: forming pores by a phase inversion method, carrying out gravity settling to obtain a cellulose acetate porous membrane with low emissivity, and dipping to obtain the flexible composite phase change membrane. The prepared flexible composite phase change film is a bendable film with certain mechanical strength, the system has the infrared emissivity reducing performance and the temperature control performance, and the composite phase change material under the dual-mode function can efficiently achieve the infrared shielding effect.

The invention belongs to the technical field of radioactive wastewater treatment and uranium extraction from seawater, and discloses a high-flux cellulose immobilized tannin membrane adsorption material as well as a preparation method and application thereof. The membrane adsorption material comprises an aldehyde cellulose acetate microfiltration membrane and waxberry tannin which is cured on the microfiltration membrane through gradient cross-linking. The membrane adsorption material provided by the invention keeps a reticular porous structure of a cellulose microporous filter membrane and has the characteristics of high flux and rapid mass transfer, the pure water flux of a single-layer membrane can reach 300 L / (m.h), the treatment capacity of a multi-layer membrane is remarkably increased, large-flow treatment can be realized, and the efficiency of extracting uranium from seawater or uranium-containing wastewater is remarkably improved.

The invention discloses a polyurethane / cellulose acetate composite fiber membrane, a preparation method and application, and belongs to the technical field of fiber membranes, the surface of the polyurethane / cellulose acetate composite fiber membrane is grafted with a polyethyleneimine chain segment; the raw materials for surface grafting comprise a polyurethane / cellulose acetate composite fiber membrane, polyethyleneimine and dopamine hydrochloride in a mass ratio of 1: (20-30): (0.4-0.8). The polyurethane / cellulose acetate composite fiber membrane has a bicontinuous structure and is high in mass transfer efficiency, and a regular fiber structure and a relatively high specific surface area provide a good physical basis for subsequent grafting of polyethyleneimine chain segments. The dopamine hydrochloride can be self-polymerized on the surface of the composite fiber membrane to form polydopamine, so that the surface activity and the adhesive force of the composite fiber membrane are enhanced, the grafting rate of polyethyleneimine is improved, and the polyethyleneimine can remarkably improve the adsorption capacity of the composite fiber membrane on heavy metal ions through coordination, ion exchange and physical adsorption.

The present invention addresses the problem of providing: a display device having both visibility and folding resistance after a key test; an optical film; and a method for manufacturing the optical film. This display device has at least a light-emitting element and a color filter, and is characterized in that the display device has an optical film containing cellulose acetate and a filler of a metal oxide or a metal salt, the degree of substitution of acetyl groups in the cellulose acetate is within the range of 2.3-3.0, and the degree of substitution of acetyl groups in the cellulose acetate is within the range of 2.3-3.0. The metal oxide or metal salt filler has an aspect ratio in the range of 110-2000.

The invention belongs to the technical field of metal powder material preparation, and particularly relates to a preparation method of modified aluminum lithium alloy powder and the powder. The preparation method comprises the following steps: dispersing aluminum-lithium alloy powder in an organic solvent to obtain a first alloy powder dispersion liquid; introducing dry inert gas into the first alloy powder dispersion liquid, adding hydrofluoric acid, and reacting to obtain second alloy powder dispersion liquid; a coating agent is dissolved in an organic solvent, a coating agent solution is obtained, and the coating agent comprises cellulose acetate and a wax substance; and adding a coating agent solution into the second alloy powder dispersion liquid, stirring at a preset temperature to volatilize the organic solvent and coat the alloy powder with the coating agent, and then carrying out vacuum drying to obtain the modified aluminum-lithium alloy powder. The modified aluminum-lithium alloy powder is good in stability, high in combustion efficiency and capable of actually releasing much heat.

The invention discloses a sodium ferric fluorophosphate positive electrode material and a preparation method and application thereof.The preparation method comprises the steps that a sodium source, an iron source, a phosphorus source, a fluorine source and a carbon source are mixed to obtain a precursor, and the carbon source is cellulose acetate; and carrying out heat treatment on the precursor to obtain the sodium ferric fluorophosphate positive electrode material. Cellulose acetate is adopted as a carbon source in battery application, and compared with traditional carbon sources such as graphene and carbon nanotubes, the raw material source is wider, no pretreatment is needed, the production cost is lower, and the method is more suitable for large-scale production and application. The specific surface area of the material is enlarged by introducing cellulose acetate with a proper proportion, the conductivity and the structural stability of the battery are enhanced, and the cycling stability and the rate capability of the battery are further improved.

The invention relates to a filter element for mouthpieces for use in smoking products or HNB products. The filter material has a filter main part from a tow material, the tow material being formed by a plurality of individual threads from cross-linked and crimped cellulose acetate filaments. The cellulose acetate filaments have a particularly polygonal and preferably Y-shaped cross-sectional geometry, and the tow material has a mass specific surface area of less than 0.15 m2 / g, more particularly less than 0.3 m2 / g, and more than 0.025 m2 / g.

The invention discloses a cellulose acetate modified solid polymer electrolyte as well as a preparation method and application thereof, and relates to the technical field of all-solid-state lithium metal batteries. And cellulose acetate is doped to enhance lithium salt dissociation and optimize a solvation structure. The strong intermolecular interaction between CA and PEGDME weakens the solvation ability of PEGDME to Li < + >, so that the formation of a CIPs / AGGs solvation structure rich in anions is promoted by enhancing the doping of lithium salt anions. The engineering solvation structure promotes the formation of a solid electrolyte interface and a catholyte interface which are rich in inorganic matters, so that the interface side reaction with a lithium metal negative electrode and a high-voltage positive electrode material is effectively inhibited. The PEGDMA-CA electrolyte exhibits enhanced high voltage stability and cycle performance in a full battery.

The present invention relates to the field of cellulose technology, and discloses a high-strength cellulose acetate blended fiber fabric and a dyeing process thereof. The present invention grafts alkenyl-containing tris (β-maleic acid ethyl piperazine) phosphate and acrylonitrile with cellulose acetate under the initiation of ammonium persulfate to obtain polymer-grafted cellulose acetate, which is then blended with polyacrylonitrile to obtain cellulose acetate blended fiber and its fabric. After cellulose acetate is grafted with acrylonitrile monomer, the interface compatibility between cellulose acetate and polyacrylonitrile is better, and the rigid skeleton of cellulose acetate after spinning can improve the breaking strength and mechanical properties of polyacrylonitrile. The polymer grafted with cellulose acetate contains an expansion flame-retardant structure of piperazine phosphate, which can promote the formation of an expansion carbon layer in the fiber during combustion, improve the limiting oxygen index of the fiber fabric, and has good flame retardant properties.