258 results about "Volatile solvents" patented technology

The invention belongs to the technical field of seawater desalination equipment, and particularly discloses a photothermal conversion coating capable of being used for a solar evaporator, a preparation method of the photothermal conversion coating and the solar evaporator. The specific preparation method of the photothermal conversion coating comprises the following steps: firstly, mixing the carbon nano tube, the black titanium dioxide, the dispersing agent, the defoaming agent and the volatilizable solvent to obtain mixed slurry; and then spraying the mixed slurry for multiple times by utilizing a hot air-assisted air spraying method to obtain the photothermal conversion coating for the solar evaporator. And the thickness is 30-80 [mu] m. The solar evaporator can be obtained by sequentially spraying waterborne polyurethane and a photothermal conversion coating on the substrate material with the water absorption rod. The prepared photothermal conversion coating has high hydrophilicity and high light absorption capacity, and the solar evaporator has high evaporation rate.

The invention relates to the technical field of waste gas separation, and discloses a low-energy-consumption recovery method and system for organic waste gas, and the method comprises the steps: analyzing the volatile solvent component concentration, concentration fluctuation data, solvent recovery energy consumption correlation factors and temperature and humidity data of the organic waste gas through multi-source coupling, and obtaining a characteristic coupling feature set; analyzing key process conditions of waste gas separation based on the feature set feed-forward situation to obtain optimal energy consumption operation parameters; the parameters and conditions of the waste gas separation process are optimized in combination with the parameters and feature set dynamic constraint, and a Pareto optimal scheme is obtained; selecting a scheme as an optimal control strategy according to separation efficiency dynamic characteristics and energy consumption stability key factors in the feature set; the digital twinning collaborative deduction control strategy and feature set is coded into a separation control instruction; based on recovery energy efficiency verification and product quality detection indexes after actual operation, performing feedback optimization to obtain a low-energy-consumption instruction generation strategy; the low-energy-consumption recovery efficiency of the organic waste gas can be improved.

The invention discloses a tooth whitening gel and a preparation method thereof. The tooth whitening gel comprises the following components in percentage by mass: 5%-25% of a film-forming agent, 0.1%-15% of peroxide, 0.1%-15% of a regulator and 45%-94.8% of a volatile solvent, the film-forming agent is modified ethyl cellulose, and the preparation method comprises the step of treating ethyl cellulose by adopting one or more of irradiation, illumination, oxidation, heating, mechanical pulverization and grinding to obtain the modified ethyl cellulose. The preparation method of the tooth whitening gel comprises the step of uniformly mixing the raw materials including the film-forming agent, the peroxide, the regulator and the volatile solvent to obtain the tooth whitening gel. The tooth whitening gel provided by the invention can be ensured not to be dissolved by saliva after being smeared on teeth, and can be ensured to be completely removed when being removed.

The invention discloses a microwave-enhanced mixed waste textile low-temperature depolymerization recovery device and method.The microwave-enhanced mixed waste textile low-temperature depolymerization recovery device comprises a feeding system, a stirring system, a microwave catalytic depolymerization system and a condensation reflux system, the feeding system comprises feeding of mixed waste textiles, a catalyst and a solvent, the microwave catalytic depolymerization system serves as a reaction zone, reactants are heated through microwaves, and the reactants are separated from the stirring system; the condensation reflux system is communicated with the reaction area, so that a volatile solvent in the reaction can be effectively refluxed; the reactants are fed into a microwave catalytic depolymerization system according to a certain proportion to be subjected to a depolymerization reaction, a solid-liquid mixed product is obtained, and a catalyst, a natural fiber solid, a solvent and a bis (hydroxyethyl) terephthalate monomer product can be further obtained from the solid-liquid mixed product. According to the method, microwave heating and the specific catalyst are combined, gradient efficient depolymerization recovery is conducted on mixed waste textiles such as natural fiber and synthetic fiber blended materials, the recovered product is high in purity and value, and the problems that in the prior art, waste textile recovery is high in energy consumption, large in process pollutant discharge amount and the like are solved.

The invention discloses a polyarylene ether nitrile nanofiber membrane and a preparation method of the polyarylene ether nitrile nanofiber membrane through double-solvent synergistic electrostatic spinning, and relates to the field of high polymer material preparation. The method comprises the following steps: preparing two electrostatic spinning solutions with obvious volatilization rate and dissolution parameter difference, and alternately depositing two types of fibers on a collecting surface by adopting dual-channel synergistic electrostatic spinning; in the deposition and drying process, chain segments at fiber cross points are induced to swell, mutually diffuse and cure in situ to form bonding points by utilizing the poor evaporation rate of a high / low volatile solvent and the poor solvent-polymer compatibility, so that the self-densification and the structure stabilization of the nanofiber membrane are realized. The obtained nanofiber membrane has high-density in-situ bonding points and remarkably improved mechanical properties, does not need additional post-treatment such as hot pressing or solvent spraying, and is suitable for application such as interlayer reinforcement and interface toughening of composite materials. The process has continuity and controllability, and the density and mechanical properties of the membrane body can be customized by adjusting a solvent system and spinning parameters.

There is provided a composition for topical application to the penis for the treatment of erectile dysfunction, the composition being free of glyceryl trinitrate (GTN), sildenafil and an acetylcholinesterase inhibitor, and comprising volatile and non-volatile solvents, the volatile solvents comprising a lower alcohol and water and the non-volatile solvents comprising a polyhydric alcohol and a glycol. Preferably, the composition does not contain any pharmaceutically active ingredients for the treatment of erectile dysfunction. Also provided is a method of determining the cooling ability of a test composition, such as the composition described above.

The present invention provides a zeolite imidazolate skeleton polycrystalline membrane and a preparation method thereof, comprising: S1: preparing a precursor solution containing metal ions and organic ligands, coating the precursor solution on a carrier, and heating and cooling the carrier coated with the precursor solution to prepare an amorphous film; the precursor solution includes a metal salt, an organic ligand, and a solvent; the zeolite imidazolate skeleton material is composed of a metal node, an organic ligand A, and an organic ligand B; the organic ligand A is imidazole-2-formaldehyde or 2-methylimidazole, and the organic ligand B is selected from 2-methylimidazole, benzimidazole, 2-aminobenzimidazole, 4,5-dichloroimidazole, 2-nitroimidazole, and 4-methylimidazole-5-formaldehyde; and the solvent is methanol. S2: treating the amorphous film with steam generated by heating a polar solvent to form a crystalline film; S3: activating the crystalline film with a volatile solvent; and the present invention prepares a continuous, dense, defect-free zeolite imidazolate skeleton membrane with strong carrier binding and gas separation performance.

Disclosed are: a cosmetic composition for absorbing sebum, comprising a wax-coated porous powder comprising a porous powder and a wax coating layer formed on the surface thereof, wherein the surface of the porous powder is an outer surface and an inner surface; and a method for preparing the cosmetic composition, the method comprising the steps of: (a) forming a wax coating layer on the outer surface and the inner surface of the porous powder; (b) supporting a volatile oil inside the powder, and (c) dispersing a result product of step (a) in a non-volatile solvent.

The utility model provides a perovskite vacuum drying device. The perovskite vacuum drying device comprises a drying cavity and a placing table arranged in the drying cavity, a sealing plate is arranged on the inner top face of the drying cavity, and an air extraction opening is formed in the surface of the side, perpendicular to the sealing plate, of the drying cavity and used for being externally connected with a vacuumizing device. A plurality of air inlets are formed in the middle of the sealing plate in the air exhaust direction and used for being externally connected with air path guide pipes. A plurality of pipelines are evenly distributed on the side, facing the containing table, of the sealing plate in parallel and correspond to the air inlets. And air outlet holes are uniformly distributed in one side, facing the placing table, of each pipeline. The perovskite vacuum drying device provided by the utility model can control the local area concentration of a volatile solvent in a crystallization process, so that a high-quality perovskite thin film is obtained in each large-size area, accurate control of each crystal orientation is realized, and a large-area perovskite thin film with uniform crystal orientation is obtained.

The application provides a method for inkjet printing of oligonucleotides, and belongs to the technical field of in-situ synthesis of oligonucleotides.The method comprises the following steps: modifying the surface of a solid carrier with a chemically active functional group; depositing oligonucleotide synthesis reagents onto the surface of the modified solid carrier by inkjet to perform in-situ synthesis; and the solvent in the oligonucleotide synthesis reagents comprises one or two of glutaronitrile, acetonitrile and propylene carbonate.The application uses a new type of difficult-to-vaporize solvent, greatly reduces the volatilization of reagents during inkjet synthesis and the generation of organic vapors during synthesis, and thus maintains a high in-situ synthesis reaction efficiency of oligonucleotides.

The present invention relates to a compacted powder comprising at least: a) an oily phase in an amount of at least 10% by weight relative to the total weight of the composition, said oily phase comprising at least one non-volatile oil; and b) a powdered phase in an amount of at least 40% by weight relative to the total weight of the composition, said powdered phase comprising at least: i) perlite; and ii) at least one spherical filler selected from the group consisting of mineral fillers, organic fillers of natural origin, and mixtures thereof; and iii) at least one particulate colorant; and c) at least one amorphous hydrocarbon-based block copolymer; and d) at least one pigment; the composition is free of talc particles or mica particles in free form and is obtainable via a process comprising the steps of: 1) mixing the oil phase, the amorphous hydrocarbon-based block copolymer, the powdered phase and at least one volatile solvent to form a slurry; and 2) injecting the slurry into a container and shaping it by compaction, in particular pressing and / or suction.

The invention discloses a polyester polymer microsphere containing hyaluronic acid (sodium) and a preparation method of the polyester polymer microsphere, the hyaluronic acid (sodium) is dispersed in a microsphere body, and the hyaluronic acid (sodium) accounts for 2-20% of the weight of the polyester polymer microsphere. The preparation method of the microspheres comprises the following steps: dispersing hyaluronic acid (sodium) in a polyester polymer solution in a non-solution form to obtain a polyester polymer solution in which hyaluronic acid (sodium) is dispersed; the step of dispersing the hyaluronic acid (sodium) in the non-solution form is that the hyaluronic acid (sodium) is dispersed in the form of solid particles or a solid particle suspension; in the polyester polymer solution, the solvent for dissolving the polyester polymer is a volatile solvent. The microspheres provided by the invention can wrap hyaluronic acid (sodium) with higher content, and have better stability.

The invention discloses a coating preparation method capable of regulating and controlling the morphology of a coating. The coating preparation method is used for spraying on an instrument. A drug solution used in the preparation method of the coating comprises at least one solvent, a drug active ingredient and an excipient in a preset proportion are added into the solvent, when only one solvent is used, the solvent is a polar and high-volatility solvent A, stirring and ultrasonic oscillation are carried out at room temperature so as to uniformly dissolve the solvent A, and the drug solution is obtained, when the medicine solution is sprayed, the spraying flow and the moving speed of a spray head are adjusted through external spraying equipment according to a preset standard so as to spray at least one layer of medicine solution on an external instrument, and therefore the preset coating morphology is formed on the surface of the instrument through the medicine. The method has the advantages that the microstructure of the coating can be controlled to improve the stability of the coating; therefore, the release effect of the medicine is ensured, and the release behavior and the tissue retention time of the medicine in various lumen stenosis diseases can meet the delivery requirements required by clinical treatment.

The invention discloses a polyurethane antifouling paint and a preparation method thereof, and belongs to the field of paints.The preparation method comprises the steps that cardanol and formaldehyde are subjected to polycondensation to form a cardanol aldehyde prepolymer, then the cardanol aldehyde prepolymer, polyether polyol and isophorone are mixed and react, and cardanol modified polyurethane is obtained; and mixing a volatile solvent, a flatting agent, nano silicon dioxide, perfluoropolyether oil and cardanol modified polyurethane to obtain the polyurethane antifouling paint. The cardanol structure is introduced, so that the film-forming property of the coating can be improved, active sites can be provided for subsequent polyurethane modification, the cohesion of the coating is enhanced to a certain extent, and the coating is more wear-resistant by matching with the nano silicon dioxide; the cardanol modified polyurethane combines the advantages of cardanol, polyether polyol and isophorone diisocyanate, and perfluoropolyether oil has extremely low surface energy, and can effectively inhibit the adhesion of marine organisms and play an antifouling role under the combined action of the perfluoropolyether oil and other components.

The present invention discloses a wave-absorbing prepreg with a high content of carbon-based wave-absorbing agent and a preparation method thereof, which relates to the technical field of wave-absorbing prepregs. The preparation method includes the following steps: mixing a carbon-based wave-absorbing agent, a volatile solvent, and an active monomer diluent to obtain adhesive solution I-1; coating the adhesive solution I-1 on the surface of a fiber cloth and drying it to form a film to obtain fiber cloth I-2; taking two layers of fiber cloth I-2, laminating them face to face, and stitching and reinforcing them to obtain three-dimensional cloth I-3; adding a carbon-based wave-absorbing agent to a resin matrix and mixing to obtain a mixed resin matrix II-1; using a hot melt impregnation method to impregnate the mixed resin matrix II-1 into the three-dimensional cloth I-3 to obtain a wave-absorbing prepreg with a high content of carbon-based wave-absorbing agent. This method significantly improves the content of the carbon-based wave-absorbing agent and the wave-absorbing efficiency in the wave-absorbing prepreg. At the same time, there is also an obvious operable space for the ply thickness, thus greatly broadening the application range of the wave-absorbing prepreg and meeting the diverse product requirements.

The utility model discloses a safe paint spraying and drying integrated device which comprises a processing box, a paint spraying device and a drying device. The processing assembly comprises a paint spraying unit and a heating unit, the paint spraying unit comprises a spray head, and the heating unit comprises an infrared lamp; the storage frame assembly comprises a translation frame, a translation unit, an overturning unit and a driving unit, and the overturning unit comprises two overturning shells and a bidirectional air pump; and the circulating filtering assembly is used for extracting gas in the processing box, filtering the gas and then returning the gas to the processing box. According to the safe paint spraying and drying integrated device, air in the processing box is continuously extracted for filtering through the circulating filtering assembly, moisture and harmful volatile solvents in the air are filtered out, then the air is returned to the processing box, cleanliness of the internal environment of the processing box is guaranteed, the processing quality and the processing efficiency are improved advantageously, accumulation of harmful substances is avoided, and the safe paint spraying and drying integrated device is suitable for popularization and application. And harmful substances are prevented from volatilizing to the outside after the box door is opened to cause environmental pollution and harm the health of workers, so that safe processing and production are realized.

The application discloses a kind of based on enhanced raman's trace furfural in oil ultrafast detection method and system, the method includes: preparation regular arrangement metal nanometer finger array on flexible polymer substrate;After depositing dielectric film on the surface of metal nanometer finger, introduce removable sacrificial layer, under the condition with temperature gradient, volatile solvent is applied, adjacent metal nanometer finger gradually approaches contact, metal-dielectric-metal gap structure is formed, so that the enhanced substrate of hotspot uniform distribution is obtained;Transformer oil sample is directly dropped on the surface of the enhanced substrate;Using Raman spectrum system, enhanced raman signal of furfural molecule in the oil sample is collected under laser excitation;According to the enhanced raman signal, the characteristic peak of furfural in transformer oil is identified.The application can realize in-situ, high-sensitivity, rapid, non-destructive detection of trace furfural in transformer oil without extraction and adsorption.

Provided is a substrate treating apparatus including a treating module, in which the treating module includes: a polishing treatment unit for polishing a substrate with a polishing pad; a cleaning treatment unit for cleaning the substrate by supplying a treatment liquid to the substrate; and a transfer chamber in which a transfer robot transferring the substrate is placed, a liquid treating chamber is provided in the cleaning treatment unit, the liquid treating chamber includes: a support unit for supporting and rotating the substrate; a treatment liquid supply nozzle for supplying a treatment liquid containing a polymer and a volatile solvent onto the substrate; a first removal liquid supply nozzle for supplying a first removal liquid onto the substrate; and a second removal liquid supply nozzle for supplying a second removal liquid onto the substrate.

This application relates to the field of solar cell technology, and more particularly to a perovskite solar cell and its fabrication method, as well as a photovoltaic module. The fabrication method of the perovskite solar cell includes: a first carrier transport layer disposed on a surface of a conductive substrate; forming a perovskite thin film by depositing a perovskite precursor solution on the surface of the first carrier transport layer; during the film formation process, a protective gas is introduced into the environment, the gas flow of which forms an acute angle with the surface of the first carrier transport layer. This protective gas protects the environmental atmosphere during the perovskite thin film fabrication process, accelerates the evaporation of volatile solvents, reduces organic solvent residue, and forms a continuous and uniformly thick large-area perovskite thin film, thereby improving the photoelectric conversion efficiency and stability of the perovskite solar cell device and promoting the industrialization of perovskite solar cells.

The application discloses a film-forming easy-to-remove low-irritation tooth whitening gel and a preparation method thereof. The film-forming easy-to-remove low-irritation tooth whitening gel comprises 1-30% of a film-forming agent, 1-15% of a plasticizer, 0.1-15% of a peroxide, 0.1-15% of a regulator and 40-95% of a volatile solvent in percentage by mass. The preparation method comprises the following steps: uniformly mixing raw materials including the film-forming agent, the plasticizer, the peroxide, the regulator and the volatile solvent to obtain the film-forming easy-to-remove low-irritation tooth whitening gel. The tooth whitening gel has better film-forming property, lower irritation, better safety in use, better whitening effect and better removal after use, and does not use a carboxyl group as an adhesion group by jointly matching the film-forming agent and the plasticizer.

The invention discloses a method for directly preparing a racemic oxidation product from a fennerenone enantiomer through photocatalysis, and belongs to the technical field of organic synthesis.The method comprises the steps that an R-type fennerenone isomer is taken to be placed in a reaction bottle, a photosensitizer containing iridium or ruthenium is added, and a solvent is added at the speed of 0.1 M in the air atmosphere; the method comprises the following steps: dissolving 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2, 8-dimethyl-1, 6-naphthyridine-3-formamide in a solvent, stirring, transferring a mixture into a photoreactor of a blue light LED (Light Emitting Diode) with the wavelength of 455-465 nm, stirring, transferring a mixed solution after the reaction is finished into a round-bottom flask, purifying a volatile solvent to obtain a product 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2, 8-dimethyl-1, 6-naphthyridine-3-formamide, and carrying out chiral HPLC (High Performance Liquid Chromatography) analysis on the product. High temperature, high pressure or a strong oxidant is not needed, and reaction conditions are mild; oxygen in air is oxidized at room temperature, so that energy consumption and pollutant generation are reduced; compared with the traditional oxidation condition, the method does not need to undergo the process of oxidation first and then high-temperature induced racemization, and the racemization product can be directly obtained.

Methods disclosed herein relate to generating silk nanoparticles with a low polydispersity index (PDI). Methods include adding a silk solution dropwise into a volatile solvent that is miscible with water, thereby forming a precipitate-bearing solution and applying shear forces to the precipitate-bearing solution for a length of time sufficient to achieve evaporation of at least 95% of the volatile solvent, thereby producing a population of silk fibroin nanoparticles in water having a polydispersity index (PDI) of 0.35 or less, including but not limited to, a PDI of 0.330 or less, 0.325 or less, 0.315 or less, 0.310 or less, 0.30 or less, 0.275 or less, 0.250 or less, 0.225 or less, or 0.200 or less. Parameters related to silk fibroin molecular weight, silk fibroin concentration, shear force application, and temperature may all be modified to achieve silk nanoparticles of a particular size exhibiting particular PDIs.

The present invention relates to an anhydrous cosmetic composition comprising, in a physiologically acceptable medium: (i) at least one alkyl cellulose, preferably ethyl cellulose, (ii) at least one film-forming polyurethane polymer, and (iii) at least one non-aqueous polar volatile solvent selected from C1-C5 lower monoalcohols and volatile hydrocarbon oils, the volatile hydrocarbon oil is selected from the group consisting of optionally hydroxylated esters, ethers, dialkoxymethane, carbonates, and mixtures thereof.

The application relates to airtight powder container, comprising an outer cover, an inner cover, an inner sieve and a base, the inner sieve is airtightly installed at the opening end of the base and is located between the inner cover and the base, the inner cover and the inner sieve are hinged through a hinge unit, the hinge unit is elastic so that the inner cover can move towards the inner sieve side when being forced, when the outer cover is covered on the base, the outer cover extrudes the inner cover so that the inner cover is tightly combined with the inner sieve. In the application, the inner cover and the inner sieve are hinged with each other, the inner cover and the inner sieve can be tightly combined together under the extrusion force of the outer cover, the airtightness of the inner sieve is guaranteed, and the volatile solvent in the cosmetic material in the base is effectively prevented from being volatilized.

The invention provides an asphalt cold-patch liquid and a preparation method thereof, and the asphalt cold-patch liquid comprises the following components in parts by mass: 100 parts of asphalt, 10-30 parts of resin containing unsaturated C = C double bonds, 20-50 parts of a long-chain unsaturated fatty acid compound and 1-2 parts of a photoinitiator, wherein the long-chain unsaturated fatty acid compound is selected from unsaturated fatty acid of which the carbon chain length is not less than C16 or ester derivatives thereof. The asphalt cold supplementing liquid abandons a traditional volatile solvent, emission of VOCs is eradicated fundamentally, and the asphalt cold supplementing liquid has excellent environment-friendly safety; long-chain unsaturated fatty acid contained in the asphalt can form a lubricating molecular film on the surfaces of asphalt particles, so that excellent flowability and construction convenience at normal temperature are guaranteed; unsaturated double bonds in the material can be subjected to rapid photopolymerization reaction under natural illumination to form a cross-linked network structure, so that intelligent curing from flowing state to high strength is realized. Through the mechanism, rapid forming can be achieved at the room temperature, the maintenance time is greatly shortened, and the maintenance efficiency is remarkably improved.

The utility model discloses a weighing device. The weighing device comprises a weighing machine; and the cooling piece is arranged on the weighing machine. According to the scheme provided by the invention, when a volatile solvent with a high saturated vapor pressure value is weighed, a vacant reagent bottle only needs to be placed on the cooling piece, the cooling piece is started to enable the reagent bottle to be in a low-temperature state, and then the corresponding solvent is added into the reagent bottle. Due to the fact that the reagent bottle is in the low-temperature state all the time under the action of the cooling piece, the volatilization rate of the solvent can be reduced in the process that the solvent is added into the reagent bottle, accurate data can be weighed through the weighing machine, and the weighing precision is obviously improved.

The invention provides a preparation method of a DIC nano speckle used on the surface of a heterogeneous material, which comprises the following steps: (1) mixing and dispersing nano particles and a volatile solvent to obtain a nano particle dispersion liquid; (2) preparing a conductive layer on the surface of the cross section of the to-be-detected sample; (3) providing an electrified droplet deposition device which comprises a high-voltage power supply module, a nozzle and a sample table, and the high-voltage power supply module comprises a positive high-voltage power supply module and a negative high-voltage power supply module; placing a to-be-tested sample on a sample table; and (4) connecting the positive high-voltage power supply module with a nozzle, connecting the negative high-voltage power supply module with a sample table, spraying the nano-particle dispersion liquid onto the conductive layer of the sample to be detected, and drying to obtain the DIC nano speckle. The preparation method provided by the invention effectively solves the problem of non-uniform distribution of nano speckles caused by inconsistent adhesion force of nano particles to the surfaces of different materials in the prior art.

Title: COSMETIC COMPOSITION COMPRISING A PARTICULAR POLYESTER, AT LEAST ONE VOLATILE SOLVENT AND AN UNMODIFIED HECTORITE TYPE FILLER AND METHOD USING IT The present invention relates to a cosmetic composition, in particular for making up human keratin materials, in particular the skin and / or the lips, preferably the lips, comprising:- at least one natural resin,- at least one polyester which is the reaction product of the following components (i), (ii) and (iii): (i) at least one polyglycerol-3 (ii) at least one dimer acid, and (iii) at least one fatty monoacid having from 8 to 30 carbon atoms, the reacted components (i), (ii) and (iii) being in a molar ratio of 1 mole of polyglycerol-3, from 0.5 to 1 mole of dimer acid and from 0.1 to less than 2.0 moles of fatty monoacid,- at least one volatile solvent, - optionally at least one non-volatile hydrocarbon oil, - at least one unmodified hectorite type filler.It also relates to a method of treatment, in particular of makeup, of human keratin materials, in which this composition is applied to said keratin materials.

The invention relates to a light-triggered slow-release sterilization type perfume composition and a preparation method thereof, and belongs to the technical field of perfume. The light-triggered slow-release bactericidal perfume composition comprises the following components in percentage by mass: 0.1-0.3 wt% of fullerene subjected to surface modification, the fullerene is subjected to surface modification treatment through a surface modifier in advance, and the surface modifier is selected from at least one of polyvinylpyrrolidone and hydroxypropyl-beta-cyclodextrin; the toothpaste comprises the following components in percentage by weight: 2.5-3.5% of glycyrrhiza glabra extract, 10-15% of essence and 0.1-0.5% of a pH regulator, and is used for regulating the pH of a system to 5.5-6.5; the solvent comprises a main volatile solvent, a polar solvent and water. The invention further discloses a preparation method of the perfume. The fullerene and the glycyrrhiza glabra extract are applied to a perfume formula, so that the perfume is endowed with a sterilization function, and the requirements of modern consumers on multifunctional personal care products are met.

This invention discloses a devolatilization process for high melt flow index and high transparency lithium-based polymer solutions. The process employs falling film evaporation for initial evaporation, followed by deep devolatilization using a twin-screw extruder, with the volatile solvent being condensed and recovered. The devolatilized polymer melt is then extruded by a screw extruder, pelletized by an underwater pelletizer, and dehydrated by a centrifugal dewatering machine to obtain finished polymer granules. This method can be used for the devolatilization of high melt flow index, high transparency, and low water content lithium-based polymer solutions, and the resulting polymer volatile content is ≤0.5% (mass fraction). The granules or cobblestone-like particles are easy for downstream processing applications. This process is simple, low-cost, can be manufactured using existing mature equipment and processes, and is easy to control and industrialize.