536 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 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 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.

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 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 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 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 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 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 invention discloses a cellulose acetate based 1, 8-naphthalimide fluorescent probe for detecting Hg < 2 + > as well as a preparation method and application of the cellulose acetate based 1, 8-naphthalimide fluorescent probe. The preparation method comprises the following steps: by taking 4-bromo-1, 8-naphthalic anhydride as a raw material, carrying out condensation reaction on the 4-bromo-1, 8-naphthalic anhydride and 4-aminobutyric acid to prepare 4-(4-bromo-1, 8-naphthalic diimide) butyric acid (BNA-B); the BNA-B and piperazine are subjected to a substitution reaction, and a compound PNA-B is prepared; the PNA-B and 4-(bromomethyl) pyridine hydrochloride are subjected to a substitution reaction, and a compound PNA-B is prepared; and the PNA-B and cellulose acetate (CA) are subjected to an esterification reaction, such that the cellulose acetate-based 1, 8-naphthalimide fluorescent probe PNA-CA is prepared. The compound can specifically recognize Hg < 2 + >, after Hg < 2 + > is added into a PNA-CA acetonitrile / PBS buffer solution under 365nm ultraviolet irradiation, the fluorescence color of the solution is changed from colorless to yellow, the response time is 20s, the detection limit reaches 9.3 * 10 <-8 > M, and the probe has a good application prospect.

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 provides a directional moisture absorption and sweat releasing functional fabric and a preparation method thereof.The fabric comprises a sweat releasing and drying layer, a capillary moisture guiding layer and a hydrophilic moisture absorption layer from outside to inside, the hydrophilic moisture absorption layer is a cellulose acetate electrostatic spinning super-hydrophilic modified layer, the capillary moisture guiding layer is formed by weaving porous polyester yarn, and the hydrophilic moisture absorption layer is a super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified cellulose acetate electrostatic spinning super-hydrophilic modified fiber. The perspiration drying layer is a silane super-hydrophobic modified layer. Porous cross-section polyester fibers are prepared by adopting a washable template method, the moisture conductivity is improved, an electrostatic spinning cellulose acetate nanofiber membrane is subjected to super-hydrophilic modification, the sweat absorption rate is increased, the skin-friendly performance is improved, a sweat-releasing and drying layer is subjected to silane hydrolysis spraying and then heat treatment to form a super-hydrophobic siloxane coating, the surface dryness is enhanced, and the moisture absorption rate is increased. Unidirectional migration and rapid evaporation of sweat from inside to outside are achieved.

The invention relates to the field of pharmacy, in particular to a tablet coating component, a preparation method and application. The modified montmorillonite cellulose acetate composite material is prepared from the following components in parts by weight: 70 parts of a modified montmorillonite cellulose acetate composite, 20 parts of polylactic acid, 10 parts of PVP, 25 parts of hydroxypropyl methyl cellulose, 10 parts of polyethylene glycol and 3 parts of maleic anhydride. The modified montmorillonite cellulose acetate compound is prepared from modified montmorillonite and cellulose acetate. According to the invention, montmorillonite is modified by hexadecyl trimethyl ammonium bromide, and then is compounded with cellulose acetate, so that the mechanical strength of the coating is improved, and the problem that the mechanical strength of the coating is different when hydroxypropyl methyl cellulose is used is solved. The tablet coating is suitable for coating of various medicines, can be used for oral medicines, can also be used for medicines of other administration routes, and has a wide application prospect.

This invention discloses a cellulose acetate-based 1,8-naphthalenedimide fluorescent probe for detecting hydrazine, its preparation method, and its application. The invention uses 4-bromo-1,8-naphthalenedimide as a raw material, which undergoes a condensation reaction with 4-aminobutyric acid to obtain 4-(4-bromo-1,8-naphthalenedimide)butyric acid (BNA-B); BNA-B undergoes a coupling reaction with 4-formylphenylboronic acid to obtain 4-(4-(4-formylphenyl)-1,8-naphthalenedimide)butyric acid (FNA-B); compound FNA-B then undergoes an esterification reaction with cellulose acetate (CA) to obtain the cellulose acetate-based 1,8-naphthalenedimide fluorescent probe FNA-B-CA. This compound specifically recognizes hydrazine. Under 365 nm ultraviolet light irradiation, the addition of hydrazine to a DMF / H2O solution of FNA-B-CA changes the fluorescence color of the solution from bright blue to colorless, indicating a detection limit of 8.4 × 10⁻⁶ for hydrazine. ‑8 M has promising applications as a fluorescent probe for the detection of hydrazine.

The invention relates to a high-temperature-resistant colorless polyimide film and a preparation method thereof, and belongs to the technical field of polymer films, and the preparation method specifically comprises the following steps: proportionally adding a diamine monomer and a dianhydride monomer into a high-boiling-point solvent, and reacting to generate a polyamide acid precursor solution; depositing a SiO2 layer on the cellulose derivative by using a sol-gel method to prepare modified cellulose; wherein the cellulose derivative is cellulose acetate; and adding the modified cellulose into the polyamide acid precursor solution, uniformly mixing, coating on the surface of a carrier, cooling after stage heat treatment, and stripping to obtain the high-temperature-resistant colorless polyimide film. Two enhancement modes of molecular design enhancement and modified cellulose enhancement are adopted, so that the comprehensive performance of the film is remarkably improved. And meanwhile, through a staged annealing process, the interface bonding of SiO2 and AC can be optimized while the internal stress of PI is eliminated, and finally, the high-strength, high-heat-resistance and low-stress composite film is realized.

The invention relates to a preparation method of a plant disease control fungicide, which comprises the following steps: taking traditional Chinese medicines with an antibacterial effect as raw materials, and carrying out first-step fermentation by adopting Trichoderma harzianum; beauveria bassiana and Penicillium baylii are subjected to second-step fermentation, bacillus velezensis is subjected to third-step fermentation, fermentation liquor is collected, a filter cake is further subjected to reflux extraction, an extracting solution and the fermentation liquor are collected, combined and concentrated into clear paste, an ethanol solution is added, standing is carried out, supernate is taken, borneol, gelatin and cellulose acetate are added to prepare mixed liquor, ultrafiltration is carried out, ultrafiltrate is collected, and freeze-dried powder is obtained. The microbial inoculum required by the invention is obtained. According to the invention, specific traditional Chinese medicines are adopted, an excellent broad-spectrum antibacterial system is formed through specific microbial fermentation, and the antibacterial system is compounded with borneol, gelatin, cellulose acetate and other components to form the fungicide, so that the effectiveness duration and the effect taking rate of the fungicide on the surface of a plant are effectively improved, and efficient prevention and treatment on various diseases such as fungi, bacteria and the like are formed.

The invention provides a composite fiber membrane, which comprises a composite fiber base membrane with a cross-linked structure, the composite fiber base membrane comprises cellulose acetate, the cross-linked structure is formed by a reaction of closed water-based isocyanate and the cellulose acetate, and the surface of the composite fiber base membrane is grafted with an acrylate structure. A cross-linked structure formed by the reaction of the cellulose acetate and the closed water-based isocyanate can accelerate the dissociation of lithium ions and promote the transmission of the lithium ions, so that the transmission rate of the lithium ions is increased; the acrylate structure grafted on the surface of the composite fiber base membrane can reduce the crystallinity of the solid electrolyte and improve the ionic conductivity of the solid electrolyte. The invention further discloses a preparation method of the composite fiber membrane, a solid-state battery and a preparation method of the solid-state battery.

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 composite fiber materials, and discloses a preparation method of a cellulose-containing phase-change composite fiber material, original fibers are bridged by using cellulose, so that the mechanical strength of the original fibers is improved; the fatty acid and the acid anhydride or the binary acid are utilized to perform esterification reaction on the cellulose diacetate so as to finish modification, and the compatibility of the cellulose and the phase change material can be improved after modification, so that the cellulose can be better mixed with the synthetic fiber, and the cellulose-containing phase change composite fiber material is better formed; further, the breaking strength of the product and the specific enthalpy of the phase-change material are improved. Meanwhile, the invention also discloses the cellulose-containing phase change composite fiber material obtained by the preparation method.

Described herein are liquid crystal (LC) assemblies that are dimmable and techniques for manufacturing LC assemblies. Example LC assemblies are described that include a flexible substrate, a twisted nematic liquid crystal, a polarizer with cellulose triacetate and an ultraviolet blocker, a polycarbonate layer, polyvinyl butyral as a connecting layer, or any combination of these features. A flexible substrate can permit an LC assembly to be applied to a window or other rigid surface, even if the surface has a three-dimensional curvature. LC assemblies featuring Guest-Host or vertical alignment configurations are also described. In some embodiments, a dimmable LC assembly is provided as part of a kit including a control unit adapted to electrically connect to the LC assembly via a cable. Both the LC assembly and the control unit can be mounted to a window or other rigid surface. The control unit can be powered using a photovoltaic cell.

The invention discloses an aroma enhancement filter stick for cigarettes, a binary aroma enhancement filter stick for cigarettes, a preparation method and application. The method for preparing the aroma-enhancing filter stick for the cigarettes comprises the following steps: frying, fermenting and carrying out steam explosion treatment on fresh tea leaves in sequence; drying, crushing and screening the fresh tea leaves subjected to steam explosion treatment to obtain solid spices; and mixing the solid spice with the cigarette cellulose diacetate tow to prepare the cigarette aroma enhancement filter stick. When the aroma enhancement filter stick for the cigarette and the binary composite aroma enhancement filter stick for the cigarette are applied to the cigarette, the smoking experience can be remarkably improved. The composite fragrance such as rich flower fragrance, sweet fruit fragrance, spicy fragrance, costustoot fragrance, green fragrance and cocoa fragrance can be endowed to smoke, and the fragrance is rich, full and distinct in gradation; meanwhile, the smoke can be endowed with unique cool and refreshing feeling and fresh and sweet feeling, the freshness of the smoke is remarkably optimized, and the irritation is effectively reduced.

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 a preparation method of superfine nanofiber antibacterial and mosquito-repellent high-efficiency low-resistance air filtration membrane, which comprises the following steps: dissolving cellulose acetate, cinnamyl aldehyde and polyhexamethylene biguanide hydrochloride in a solvent, fully stirring to form a spinning solution, wherein the solvent is a mixed solution of acetone, N, N-dimethylacetamide and water; and performing electrostatic spinning on the spinning solution to obtain the superfine nanofiber antibacterial and mosquito-repellent high-efficiency low-resistance air filtration membrane. The manufacturing steps of the application are simple and not complicated; cellulose acetate has excellent mechanical properties, hydrophobicity and thermal stability, and is an ideal material for air filtration membrane; the liquid property of cinnamyl aldehyde can effectively dilute cellulose acetate, so that the overall binding energy of the mixed solution system is reduced, the diameter of the prepared fiber is reduced, and meanwhile, the mild binding force of cinnamyl aldehyde minimally affects the interaction between cellulose acetate molecules.