45 results about "Cellulose acetate membrane" patented technology

The invention belongs to the field of fluorescence monitoring, and particularly relates to a preparation method of a fluorescent probe for monitoring chloride ions in a cement base and detection equipment, and the preparation method comprises preparation of sodium alginate fluorescent nanoparticles, preparation of a cellulose acetate membrane solution and preparation of the fluorescent probe. The prepared sensor is excellent in performance, the detection range of chloride ions in a cement matrix reaches 0.001-0.3 M, the average measurement error is only 1.4%, the single measurement error is smaller than or equal to 3%, the single measurement time is only 6 seconds, and in-situ, rapid and high-precision monitoring of the chloride ions is achieved. The invention provides an effective new technical means for concrete structure durability monitoring, and has important engineering application value.

The invention provides a multi-stage synergistic wound repair nanofiber membrane and a preparation method thereof. The composite fiber membrane sequentially comprises an electrostatic spinning pullulan / tannic acid / tranexamic acid nanofiber membrane for promoting the formation of blood clots, a polydopamine / calcium chloride modified electrostatic spinning cellulose acetate membrane with coagulating, antibacterial and repairing effects, and a chitosan composite cellulose non-woven fabric, and the electrostatic spinning pullulan / tannic acid / tranexamic acid nanofiber membrane is a wound surface contact layer. The nanofiber membrane has the functions of a physical hemostasis barrier and continuously releasing regeneration promoting biological signals, and a dynamic hemostasis healing process is formed.

The invention discloses a snore-preventing device capable of being automatically adjusted to resist muscle fatigue. The snore-preventing device comprises a split tooth socket, an induction module, an integrated chip and a release module. The split tooth socket comprises a left rear molar tooth socket, a right rear molar tooth socket and an elastic pressing strip, the shell is formed by polyurethane 3D printing, a resin pressing die tooth socket is embedded in the shell, and a battery, an integrated chip and a signal circuit are arranged in the shell; the sensing modules are symmetrically arranged on the working surface of the inner side of the tooth socket and comprise flexible pressure sensors, humidity monitors and broken contact monitoring devices, the bottoms of the pressure sensors are arc-shaped triangular surfaces, the surfaces of the pressure sensors are covered with cellulose acetate films for resisting bacteria, and humidity monitoring ports are provided with carbon nanofiber pads for resisting moisture. The integrated chip converts the sensing data into an electric signal through the analog-to-digital converter, the signal processor and the transmitter and transmits the electric signal to the release module; after receiving the signal, the release module generates micro-current through an electrode to stimulate muscles, and the snoring symptom is inhibited. The shell is covered with a poly-o-phenylenediamine membrane, so that durability is enhanced, and the whole structure is small and portable and suitable for sleep breathing management.

The utility model discloses a high-refraction polarized hard film lens, which comprises a PVA (Polyvinyl Alcohol) hard film, and the thickness of the PVA hard film is 0.15-0.20 mm. The cellulose triacetate membrane layer is coated on the surface of the PVA hard membrane; the resin substrates are cured and formed on the two sides of the cellulose triacetate membrane layer; the plurality of light diffusion sunken units are formed on the front surface of the resin substrate through laser marking, and the light diffusion sunken units are annularly distributed; the organic silicon film layer is dip-coated on the surface of the resin substrate; the high-refractive-index film layer group is plated on the surface of the organic silicon film layer; and the indium tin oxide film layer is plated on the surface of the high-refractive-index film layer group. According to the utility model, the cellulose triacetate film layer is coated on the PVA hard film, so that the polarization effect is improved; the light diffusion sunken unit is marked by laser to form light diffusion, stray light is effectively reflected, and reflection reduction is achieved in cooperation with the high-refractive-index film layer set.

The present invention discloses an air-cooled magnetic levitation variable frequency centrifugal unit capable of reducing gas emissions, which includes a frame body, a centrifugal unit body, a control box, a condenser and a cooling fan. The centrifugal unit body is arranged inside the frame body, the control box is arranged on one side of the frame body, condensers are evenly distributed near the top of the centrifugal unit body inside the frame body, and cooling fans are evenly distributed on the top of the frame body. For this air-cooled magnetic levitation variable frequency centrifugal unit capable of reducing gas emissions, first, carbon dioxide inside the gas is preliminarily separated by a cellulose acetate membrane. Subsequently, the water pump can extract the organic amine solution through the second connecting pipe and the first connecting pipe, and then the organic amine solution is sprayed through a nozzle, so as to reduce the carbon dioxide gas during emission, thereby avoiding the greenhouse effect caused by the carbon dioxide emission of the air-cooled magnetic levitation variable frequency centrifugal unit to the surrounding area.

The invention discloses a construction method and an evaluation method for evaluating and regulating the optical performance of a cellulose acetate film. The construction method comprises the following steps: S1, molecular modeling: carrying out molecular modeling on an acetyl substituted monomer of cellulose acetate; s2, obtaining components alpha xx, alpha yy and alpha zz of polarizability in different coordinate directions corresponding to different wavelengths; s3, constructing a function relationship between the intrinsic birefringence delta n0 (monomer) of a certain monomer of the cellulose acetate monomer and the intrinsic birefringence delta n0i of a certain conformational isomer of the monomer; s4, respectively solving the intrinsic birefringence contributions of 2, 3 and 6 acetyl groups; s5, obtaining substitution degree distribution of 2, 3 and 6 bits; and S6, constructing a CA birefringence function relationship, and solving theoretical birefringence. According to the method, a logical relationship is established between the substitution degree of hydroxyl and acetyl in each monomer conformation, the conformation ratio and the birefringence, a theoretical value that the birefringence of the cellulose acetate is closer to an actual value is obtained, and an effective method is provided for accurate prediction and regulation of optical performance.

The application relates to a high-strength high-separation-performance carbon molecular sieve hollow fiber membrane and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing cellulose acetate, cellulose, an organic solvent and an ionic liquid to prepare a casting solution, and stirring and heating the casting solution; (2) vacuumizing and defoaming the casting solution, and preparing a hollow fiber cellulose acetate membrane by using a dry-wet spinning method; and (3) drying the hollow fiber cellulose acetate membrane, and preparing the high-strength high-separation-performance carbon molecular sieve hollow fiber membrane by carbonizing under temperature rise in a protective atmosphere. Compared with the prior art, the carbon molecular sieve hollow fiber membrane has good gas separation performance and high strength. The carbon molecular sieve membrane is used for He / CH4 separation, has high He permeation performance and a high He / CH4 separation factor, has good gas separation performance under high pressure, and provides a new choice for natural gas helium extraction membrane materials.

The application discloses a kind of oil-containing water body separation membrane for refining process of Bupleurum volatile oil and preparation method and application.The preparation method of the application is first mixed and dissolved according to proportion with cellulose acetate and cellulose nitrate powder, form casting membrane liquid, and the base membrane is prepared using non-solvent phase conversion method;Second, the film is deacetylated;After that, it is soaked in acyl chloride n-hexane solution for crosslinking;Finally, by in-situ hydrolysis of silane coupling agent on the membrane surface, a hydrophobic surface is prepared, and an oil-containing water body separation membrane for refining process of Bupleurum volatile oil is obtained.This method forms a hydrophobic layer on the surface of the membrane, which strengthens the rapid passage of Bupleurum volatile oil molecules and inhibits the penetration of water;Using the oil-containing water body separation membrane avoids the formation of emulsion during oil-water separation, showing high separation efficiency and stability, and widening the application of cellulose acetate membrane in traditional Chinese medicine preparation process.

The application discloses a high-transparency nano-resin lens, which comprises a resin substrate, a nano-cellular membrane layer adhered to the front surface of the resin substrate through an organic silica gel layer, the nano-cellular membrane layer comprising an inner thermoplastic polyurethane film, a polyvinyl alcohol film, a triacetate cellulose film and an outer thermoplastic polyurethane film, and a functional membrane layer plated on the surface of the nano-cellular membrane layer; wherein the nano-cellular membrane layer has a honeycomb structure. The nano-cellular membrane layer with the honeycomb structure is arranged to improve the light transmittance of the resin lens, enhance the definition and reduce the interference of stray strong light.

The invention relates to preparation of a FeCoOnPm / g-C3N4 photo-activated PMS membrane material and application of the FeCoOnPm / g-C3N4 photo-activated PMS membrane material to degradation of typical anti- The surface lattice and vacancy structure of the FeCo bimetallic oxide is regulated and controlled through P doping, the FeCo bimetallic oxide is compounded with N-defect g-C3N4, an effective interface electric field is constructed, directed migration of electrons is promoted, and the FeCoOnPm / g-C3N4 composite catalytic material is formed. After the particle size of the catalytic material is regulated and controlled, the catalytic material is blended with a cellulose acetate membrane casting solution, and the FCOP / CN catalytic membrane is obtained. In the PMS photoactivation process, under the synergistic effect of an interface electric field and an electron migration channel, photo-induced electrons generated on the surface of the FCOP / CN catalytic membrane are directionally transferred, so that the high-low valence cycle stability of Fe / Co double catalytic sites is maintained. And meanwhile, PMS is activated through double-site synergism of Fe and Co to promote the PMS to be converted into active oxide species. The removal rate of target pollutants can be maintained to be 99% or above when the catalytic membrane material is continuously operated.

The utility model discloses a kind of polarizing sheets with double-sided adhesive, including polarizer, the top and bottom of the polarizer are all fixedly connected with triacetate cellulose film, the outside of triacetate cellulose film is fixedly connected with polarizer layer, the outside of the polarizer layer is fixedly connected with adhesive film, the outside of the adhesive film is fixedly connected with release film, the outside of the release film is fixedly connected with scratch-resistant coating, the outside of the scratch-resistant coating is fixedly connected with reinforcing coating strip, the inside of the scratch-resistant coating is provided with ceramic fine powder particle layer, the ceramic fine powder particle layer cooperates with scratch-resistant coating and uses, the bottom of the ceramic fine powder particle layer is provided with carbonized nitrogen powder layer.The utility model polarizing sheet changes traditional in storage or handling process, very easy to encounter friction scratch and other phenomena, scratch-resistant coating and reinforcing coating strip are used to carry out scratch-resistant reinforcing treatment, so that it can guarantee that its service performance will not be damaged due to external force, increase its service life.

The invention discloses a modified cellulose acetate dialysis membrane and a preparation method thereof.The preparation method comprises the following steps that after a cellulose acetate membrane is hydrolyzed for 1 min, the acetyl part of the cellulose acetate membrane is removed, then the cellulose acetate membrane with the acetyl part removed is subjected to an oxidation reaction, and the cellulose acetate membrane with the acetyl part removed is obtained; a selective oxidation catalyst A and / or a co-catalyst B are / is used in the oxidation reaction process, and an oxidant C is one of sodium hypochlorite, sodium chlorite, calcium hypochlorite, hydrogen peroxide, persulfate or sodium periodate; and then adding chitosan which is subjected to crosslinking modification by dialdehyde cellulose to carry out grafting reaction. According to the method, the grafting effect can be optimal only through the synergistic cooperation of the carboxyl active site amount and the crosslinking degree of the chitosan, and the urea adsorption capacity and the blood compatibility of the cellulose acetate membrane are remarkably improved.

This invention relates to the field of cellulose acetate (TAC) membrane technology, specifically to a cellulose acetate membrane and its preparation method. The components include a solvent and solid components, by weight, wherein the solid components include: 80-110 parts cellulose, 5-10 parts plasticizer, and 0.1-5 parts benzotriazole derivative, with the solid components comprising 10-30 wt% of the total components. The prepared TAC membrane exhibits the following characteristics: fewer than 3 precipitates on the membrane surface; after high-temperature and high-humidity aging for 1000 h, the TAC membrane has a ΔE value < 0.10, a Δtsb transmittance (380nm-550nm value) < 0.5, and the area ratio of point-like, oily, and contaminant precipitates on the membrane surface is < 1%.

The invention discloses a preparation method and application of Chinese herbal medicine hydrogel. The preparation method of the Chinese herbal medicine hydrogel comprises the following steps: (1) preparing keratinocyte vesicles by taking keratinocytes as a raw material, then adding asiaticoside, and extruding back and forth through a cellulose acetate membrane to obtain keratinocyte loaded asiaticoside vesicles; and (2) diluting the keratinocyte loaded asiaticoside vesicles with a buffer solution, then adding calcium carbonate powder, then adding atriplex obscura leaf powder, uniformly mixing, and then shaping with a mold to obtain the Chinese herbal medicine hydrogel. According to the Chinese herbal medicine hydrogel, the asiaticoside is combined with the keratinocyte bionic nano-vesicles, so that the medicine can be promoted to better reach the interior of skin cells, and the Chinese herbal medicine hydrogel is particularly suitable for treating burn wounds, diabetic wounds and other wounds difficult to heal.

The invention discloses an antibacterial cellulose acetate membrane and a preparation method thereof, and belongs to the technical field of membrane materials, the prepared antibacterial cellulose acetate membrane comprises the following raw material components: cellulose acetate, succinic acid, phytic acid, a modified antibacterial substance, a solvent, a cross-linking agent and a catalyst; a preparation process of the modified antibacterial substance comprises the following steps: mixing chitosan, acetic acid and water, then adding nano silver nitrate and dodecyl dimethyl phenoxyethyl ammonium bromide, and carrying out ultrasonic dispersion mixing and drying to obtain the modified antibacterial substance. The antibacterial cellulose acetate membrane prepared by the preparation method disclosed by the invention has good antibacterial property, high water flux and good durability, and the service life of the cellulose acetate membrane is greatly prolonged.

The invention discloses a preparation method of a cellulose acetate self-supporting carbonized membrane, which comprises the following steps: preparing a cellulose acetate membrane by taking cellulose acetate as a precursor and adopting an electrostatic spinning technology, sequentially carrying out deacetylation, metal crosslinking and Lewis acid activation treatment on the membrane, cleaning and drying, and carbonizing in a nitrogen atmosphere to obtain the cellulose acetate self-supporting carbonized membrane. And finally obtaining the cellulose acetate self-supporting carbonized membrane. The cellulose acetate self-supporting film is prepared by adopting a metal crosslinking and Lewis acid activation method, so that a pre-oxidation step in an existing CA carbonized film technology is omitted, the energy loss is reduced, and the method has more advantages in the aspects of economy and environmental protection.

The invention discloses a high-transparency, low-temperature processable cellulose acetate film and its preparation method. The high-transparency cellulose acetate film comprises, by weight percentage, the following raw materials: 75-85 parts of modified cellulose acetate, 12-20 parts of plasticizer, 2-6 parts of transparency agent, where the plasticizer and transparency agent are both composite additives. The preparation process involves uniformly blending all raw materials, followed by uniform mixing and drying, extrusion, granulation, drying, and casting, to obtain a high-transparency cellulose acetate film. The cellulose acetate film prepared by the above method utilizes the synergistic effect of the specific plasticizer and transparency agent, which not only significantly reduces the processing temperature but also results in a film with high light transmittance and low haze. The film exhibits good extensibility and flexibility, excellent antibacterial properties, and the process is simple, time-saving, and efficient, making it suitable for large-scale industrial production.

The present invention discloses a cellulose acetate membrane, a preparation method thereof, and an application thereof. The present invention relates to the field of fiber membrane technology. The present invention comprises the following steps: S1, debonding, breaking up, and vacuum drying a bleached bamboo pulp sheet, and adding it to an analytically pure acetic anhydride reagent to obtain fully swollen bamboo pulp fibers; S2, adding analytically pure trifluoroacetic acid to the acetic anhydride solution in step S1, subsequently adding acetic acid and stirring, heating the mixture in a water bath, adding deionized water to precipitate solids, filtering, and drying to obtain cellulose acetate; S3, mixing the resulting cellulose acetate with activated polyethylene glycol, subsequently adding sodium benzoate, stirring and mixing again until uniformly mixed, air-drying, dissolving in a chloroform solution to obtain an enhanced cellulose acetate solution, coating, and naturally drying to finally obtain a cellulose acetate membrane. The cellulose acetate membrane prepared by the present invention has good biocompatibility, green degradability, excellent mechanical tensile properties, high light transmittance, and ultraviolet light shielding properties.

This application provides a housing for an electronic device and a method for manufacturing the same, relating to the field of electronic product technology. The housing has a cellulose acetate membrane and a protective layer sequentially disposed on the inner surface of a substrate. The cellulose acetate membrane imparts a unique texture and gloss to the housing. By using a polycarbonate layer, a polymethyl methacrylate layer, or a composite board made of polycarbonate and polymethyl methacrylate as the substrate and protective layer, and by making both the substrate and protective layer from plastic, the manufacturing cost of the housing can be reduced, thereby saving on the overall production cost of the electronic device. Furthermore, by sandwiching the cellulose acetate membrane between the substrate and the protective layer, the cellulose acetate membrane can be protected from both sides, and the gaps on both sides of the cellulose acetate membrane can be reduced, enhancing the density of the housing. This, in turn, improves the waterproof performance of the housing and enhances the reliability of both the housing and the overall electronic device.

The invention discloses an amino quantum dot doped cellulose acetate-based phase conversion film and a preparation method and application thereof, and relates to the technical field of high polymer material separation membranes, the preparation method comprises the following steps: mixing cellulose acetate and a solvent, and sequentially carrying out stirring, ultrasonic treatment, filtration and standing defoaming treatment to obtain a cellulose acetate casting solution; scraping the cellulose acetate membrane casting solution on a support plate to form a liquid membrane, carrying out air retention treatment, and carrying out non-solvent induced phase inversion treatment on the liquid membrane in a coagulating bath to obtain a cellulose acetate membrane; mixing the cellulose acetate membrane with an alkaline aqueous solution, and carrying out hydrolysis treatment to obtain a cellulose acetate membrane subjected to hydrolysis treatment; and mixing the hydrolyzed cellulose acetate membrane with an amino quantum dot solution, carrying out an adsorption reaction, washing, and freeze-drying to obtain the amino quantum dot doped cellulose acetate-based phase conversion membrane. The phase conversion membrane prepared by the invention has higher retention rate and flux, and can be used as a high-performance separation membrane material.

The invention discloses a high-pulse zinc-silver reserve battery, belonging to the technical field of zinc-silver reserve batteries. The battery comprises a gas generator, a liquid reservoir, a positive plate, a negative plate, and a separator. The invention is characterized in that: the positive plate is prepared by firstly pressing silver powder with a high specific surface area onto a silver wire skeleton by a rolling process, the thickness of the positive plate being 0.21 mm to 0.24 mm, then performing formation charging by a rich liquid single formation process, the charging capacity being 120% to 130% of the theoretical capacity of the plate, and finally performing a post-formation pre-discharge treatment, the pre-discharge capacity being 20% ​​to 30% of the theoretical capacity; the negative plate is prepared by firstly pressing electrolytic zinc powder with a high specific surface area onto a silver wire skeleton, and performing formation by a single formation process, the thickness of the negative plate after formation being 0.43 mm to 0.48 mm; the separator is a high-pulse zinc-silver reserve battery, the thickness of the negative plate after formation being 0.43 mm to 0.48 mm, the area resistance of the separator is not more than 0.10 Ω·cm 2 triacetyl cellulose membrane.

This invention provides a method, replica film, and application for directly detecting silicon nitride grain boundary phases. The method includes the following steps: S1, etching a polished silicon nitride ceramic sample with hydrofluoric acid solution; S2, replicating the etched polished surface with a first solvent and a cellulose acetate film to obtain a primary replica; S3, vacuum-depositing a carbon film onto the primary replica to obtain a secondary replica; S4, cutting and attaching the secondary replica film to low-temperature paraffin wax, then dissolving the cellulose acetate in a second solvent; S5, transferring the dissolved secondary replica film to a third solvent, and after the secondary replica film has fully expanded, retrieving it with a copper mesh, drying it, and observing it under an electron microscope. The method provided by this invention can separate the grain boundary phase from the silicon nitride main phase, obtaining the solid grain boundary phase while retaining the morphological outline of the silicon nitride main phase. This method is simple to operate, low in cost, and provides great convenience for studying the influence of grain boundary phases on the mechanical and optical properties of silicon nitride separately.

The invention discloses a method for detecting thrombin activity in a biological product by using a functionalized electrode, and belongs to the technical field of electrochemical detection. Firstly, thrombin specific substrate polypeptide is fixed on the surface of a silk-screen printing gold electrode through an Au-S bond, and the N end of the polypeptide is modified with ferrocene (Fc) to serve as an electroactive signal molecule; then the surface of the electrode is coated with a cellulose acetate membrane (CA) to obtain a functionalized electrode, and the CA membrane can reduce non-specific adsorption and prevent electrode pollution and signal attenuation; dropwise adding a solution containing thrombin onto the functionalized electrode for reaction; and washing the reacted electrode, testing by using a square wave voltammetry, and obtaining the thrombin activity according to the change of the peak current. The method is convenient to operate, high in specificity, short in consumed time and long in storage time of the functionalized electrode, and is an effective means for detecting the thrombin activity in the biological product.

The invention discloses a photo-thermal evaporation water purification fabric based on cellulose acetate hollow fibers and a preparation method, and relates to the field of photo-thermal materials and solar interface evaporation. A carbon black-loaded cellulose acetate membrane is prepared from a mixed solution of cellulose acetate and carbon black and deionized water, the cellulose acetate membrane is deacetylated in an ethanol / water mixed solution of NaOH, then the surface of the cellulose acetate membrane is uniformly coated with ZIF-8 particles, composite hollow fibers are obtained, the composite hollow fibers are used as weft yarns, the carbon black-loaded cellulose acetate membrane is used as warp yarns, and the ZIF-8 particles are uniformly coated on the surface of the composite hollow fibers. The photothermal evaporation water purification fabric with a uniform structure is formed by carrying out plain weaving in a staggered manner according to the quantity ratio of 1: 1, can realize regulation and control of a solar water evaporation interface, integrates functions of photothermal conversion, water vapor regulation and control and pollutant separation, and can be widely applied to solar water purification scenes such as seawater desalination, organic wastewater treatment and environmental restoration.

The invention discloses a miniaturized portable PCR-SERS nucleic acid instant detection platform, and belongs to the technical field of nucleic acid detection. The platform is composed of a miniaturized thermal cycler, a miniature PCR reaction cavity, a filling type detection pen and a lateral flow chromatography test strip, a core component of the miniaturized thermal cycler is an inner core capable of providing temperature required by PCR amplification reaction, and the miniature PCR reaction cavity is composed of an upper-layer heat insulation adhesive tape, a PCR amplification paper film and a lower-layer heat insulation adhesive tape. The PCR amplification paper membrane is composed of a cellulose acetate membrane and a reagent which is freeze-dried on the cellulose acetate membrane in advance and is required by a PCR reaction, and a surface carboxylation SERS probe which is activated by EDC / NHS and is coupled with targeted recognition molecules is sprayed on a combination pad of the lateral flow chromatography test strip. The miniature thermal cycler has the beneficial effects that the volume of the miniature thermal cycler is about 35cm < 3 >, so that the miniature thermal cycler is very convenient to carry; reagents required by the PCR reaction are freeze-dried on the cellulose acetate membrane in advance, so that reagent-free operation in the whole process is realized.

Increasing concerns about cytotoxicity caused by traditional ophthalmic product preservatives have driven demand for preservative-free solutions while challenging manufacturers to maintain sterility and safety standards. Inherent user risks have been combined with random manufacturing contamination, resulting in devastating product recalls in recent years. The present invention is a bioactive, affinity filtration system for medical dispensing devices engineered to remove preservatives and contaminants from ophthalmic and other medical solutions when administered. This “just in time” filtration enables manufacturers to follow established preservative practices to ensure safety while delivering a “preservative free” solution upon administration. Without altering the therapeutic formulation, the invention combines adsorption and absorption filtration mechanisms with engineered fullerene derivatives and cellulose acetate membranes to remove preservatives like benzalkonium chloride, thimerosal, and stabilized oxychloro complexes. The invention is designed for integration into established manufacturing, packaging, and stability quality control protocols consistent with the most rigorous antimicrobial patient safety standards.

The application discloses a friction nanogenerator and a preparation method and application thereof. The composition of the friction nanogenerator comprises a first friction unit, a second friction unit and a flexible support framework, the composition of the first friction unit comprises a first electrode layer and a first friction layer which are laminated and attached, the composition of the second friction unit comprises a second electrode layer and a second friction layer which are laminated and attached, the first electrode layer and the second electrode layer are both fixed on the flexible support framework, the first friction layer and the second friction layer are arranged face to face and do not directly contact each other, the first friction layer is a porous cellulose acetate film, and the second friction layer is a polyvinylidene fluoride film. The friction nanogenerator has the advantages of light mass, good flexibility, high stability and the like, and the preparation method is simple, the production cost is low, the equipment requirement is low, and the friction nanogenerator is suitable for large-scale production and application.

This invention discloses a fluorescent probe molecule, a fluorescent cellulose nanoparticle membrane, and their applications. The fluorescent probe molecule uses methylene blue as the fluorophore and allyl groups as the recognition sites. The fluorescent cellulose nanoparticle membrane is prepared by uniformly mixing the fluorescent probe molecule with cellulose diacetate to form a spinning solution, and then using electrospinning technology to obtain a flexible fluorescent sensing film. The resulting flexible fluorescent sensing film is a fluorescent cellulose nanoparticle membrane for carbon monoxide detection. The prepared fluorescent probe molecule has advantages such as simple operation, low cost, high selectivity, rapid response, and real-time monitoring, making it suitable for detecting carbon monoxide in the ecological environment. The combination of the cellulose diacetate membrane and the fluorescent probe molecule not only improves the detection performance and application range but also reduces costs and environmental impact, demonstrating broad application prospects.

The invention discloses a fluorescent probe molecule, a fluorescent nano cellulose membrane and application. The fluorescent probe molecule takes methylene blue as a fluorophore and allyl as a recognition site; the fluorescent nanocellulose membrane is prepared by uniformly mixing the fluorescent probe molecule and cellulose diacetate to prepare a spinning solution, and preparing a flexible fluorescent sensing film through an electrostatic spinning technology, and the obtained flexible fluorescent sensing film is the fluorescent nanocellulose membrane for carbon monoxide detection. The prepared fluorescent probe molecule has the advantages of simplicity in operation, low price, high selectivity, quick response, real-time monitoring and the like, so that the fluorescent probe molecule is suitable for detecting carbon monoxide in an ecological environment; the combination of the cellulose diacetate membrane and the fluorescent probe molecule not only improves the detection performance and the application range, but also reduces the cost and environmental influence, and shows a wide application prospect.

The invention provides a multifunctional non-woven material filter stick, a preparation method thereof and a cigarette product. The multifunctional non-woven material filter stick comprises a non-woven fabric and a base material which are stacked and wound, the non-woven fabric is made of one or more of lyocell fibers, modal fibers, polylactic acid fibers, viscose fibers, hemp fibers and wood pulp fibers; the base material comprises a membrane material, and the membrane material comprises one or more of a polylactic acid membrane, a polyvinyl chloride membrane, a polyethylene membrane, a polypropylene membrane, a polyethylene glycol terephthalate membrane, a polyadipic acid / butylene terephthalate membrane, a cellulose acetate membrane, a water-based coating membrane and a metallized membrane. The filter stick is prepared from the non-woven fabric made of the specific material and the base material made of the specific material, the non-woven fabric has a good tar reducing and harm reducing effect, and the content of harmful substances such as nicotine and tar in smoke can be obviously reduced; the base material can improve the roundness, hardness and the like of the filter stick, so that the filter stick has good supporting performance.