41 results about "2,2,2-Trifluoroethanol" patented technology

The invention relates to a method for continuously synthesizing methyl trifluoroethyl carbonate through three-stage series connection, which comprises the following steps of: reacting dimethyl carbonate and chlorine in the presence of an activated carbon loaded ferric trichloride catalyst, introducing into a gas-liquid separator after the reaction is ended, separating to obtain reaction feed liquid a and unreacted chlorine, and returning the unreacted chlorine to continue the reaction; sufficiently mixing a 50wt% sodium hydroxide solution, trifluoroethanol and the reaction material liquid a, and then carrying out constant-temperature reaction to obtain a reaction material liquid b; methanol and the reaction feed liquid b are fully mixed for a reaction, after the reaction is finished, a reaction product is taken out, a lower-layer methyl trifluoroethyl carbonate crude product is obtained through separation and then rectified and purified in a rectifying tower, and finally high-purity methyl trifluoroethyl carbonate is obtained. Through the design of the micro-channel reactor and the gas-liquid separator, use and recovery of chlorine are effectively controlled, and the safety risk is reduced; meanwhile, the separation cost is low, the energy consumption is reduced, and the high-purity methyl trifluoroethyl carbonate is obtained.

The invention discloses a preparation method of a cyanoborate lithium salt derivative, which comprises the following steps: 1, mixing an alcohol compound, a lithium source compound, a boron source compound and trimethylsilyl cyanide in a polar organic solvent, and filtering after complete reaction to obtain a cyanoborate crude product filtrate; the alcohol compound is selected from one of 2, 2, 2-trifluoroethanol, 2, 2-difluoroethanol, 2-fluoroethanol, 3-hydroxypropionitrile, allyl alcohol and propargyl alcohol; the lithium source compound is selected from one of lithium carbonate and lithium hydroxide; the boron source compound is selected from one of boric acid, diboron trioxide and boron tribromide; the reaction temperature is controlled to be 0-120 DEG C; and 2, adding an inert organic solvent into the cyanoborate crude product filtrate for crystallization, and performing vacuum drying to obtain a finished product of the cyanoborate lithium salt. The method has the advantages of high yield and purity, simple process, convenience in operation and low cost, and is extremely suitable for industrial production.

The application discloses a coating material, an antifog and antifouling coating with a surface microstructure array based on the coating material and a preparation method of the coating. Raw materials of the antifog and antifouling coating material include SBMA, TFEMA, BPA and a polymerization initiator; the preparation method of the coating comprises the following steps: S1), preparing a PDMS mold with a surface microstructure array: preparing single-layer silica balls, transferring the single-layer silica balls to a PDMS film surface, and obtaining the PDMS mold after washing away the silica balls; S2), synthesizing the coating material; S3), preparing a polymer coating: injecting a trifluoroethanol solution of the coating material into the PDMS mold and covering the PDMS mold with a base material, stripping the mold after ultraviolet curing, and obtaining the antifog and antifouling coating. The antifog and antifouling coating in the application has high transparency, strong adhesion, excellent antifog and antifouling performance, good biocompatibility, and certain application value on medical endoscopes.

The application discloses a cyclohexane-fused masked 2-pyridone compound and a preparation method and application thereof, and relates to the technical field of organic synthesis. The preparation method comprises the following steps: taking a simple and easily obtained substituted cyclohexane cyclopentadienyl ester as raw material, taking iodobenzene diacetic acid as an oxidant, taking ammonium carbamate as a nitrogen source, taking magnesium oxide and water as additives, taking chloroform and 2,2,2-trifluoroethanol as mixed solvents, and reacting at room temperature to obtain the cyclohexane-fused masked 2-pyridone compound. The application has the advantages of mild reaction condition, simple operation, high yield, wide reaction substrate range and the like, and does not need to use a metal catalyst, does not need to be heated and does not need to be operated in a water-free and oxygen-free manner. The cyclohexane-fused masked 2-pyridone compound prepared by the application has a good inhibiting effect on plant pathogenic fungi, and can be used for the prevention and treatment of tomato gray mold, cereal scab, rapeseed sclerotinia, pepper pythium blight and grape cavity disease.

The invention relates to the technical field of chemistry and chemical engineering, in particular to an ultrasonic-promoted tembotrione acid preparation method which comprises the following steps: in the presence of inorganic base, performing substitution hydrolysis on bromide and trifluoroethanol in an organic solvent A under the promotion of ultrasonic waves; after the reaction is finished, distilling and recovering the organic solvent A, and if the organic solvent B is the same as the organic solvent A, omitting the distilling step; adding water and an organic solvent B into the distilled reaction product, if the organic solvent B is the same as the organic solvent A, not adding the organic solvent B, standing for layering, and extracting a water layer by using the organic solvent B; combining organic phases, and recycling and reusing by distillation; combining water phases, adjusting the pH value to 1-2 by using hydrochloric acid, filtering and washing to obtain a tembotrione acid product; according to the present invention, the reaction speed is improved so as to shorten the reaction time, improve the reaction selectivity, and reduce the impurity generation so as to improve the reaction yield;

The invention discloses a simple synthesis method of 2, 2, 2-trifluoroethyl ether, and belongs to the field of organic synthesis. According to the synthesis method, the easily available 2, 2, 2-trifluoroethanol, trifluoromethanesulfonic anhydride / trifluoromethanesulfonyl chloride and the like are directly adopted to synthesize the 2, 2, 2-trifluoroethyl ether in one step under the action of organic alkali and under the conditions of normal temperature and normal pressure, dangerous metal / high temperature and high pressure / gas delivery is not involved, the preparation cost of the 2, 2, 2-trifluoroethyl ether is greatly reduced, and the synthesis method is suitable for an industrial production route.

The invention belongs to the technical field of all-solid-state lithium metal batteries, and particularly relates to a fluorinated modified polyvinylidene fluoride-based solid electrolyte and a preparation and application method thereof, and the preparation method comprises the following steps: 1) uniformly mixing shell membrane powder and trifluoroethanol, placing in an air dry oven for reaction, taking out, washing, centrifuging, and drying and grinding the obtained solid; 2) stirring and dissolving the fluorinated shell membrane powder, a lithium salt and polyvinylidene fluoride in a mixed solvent of dimethylacetamide, anhydrous acetonitrile and tetrahydrofuran to obtain a polymer electrolyte containing the fluorinated shell membrane powder; uniformly coating in a carrier, standing to form a film, and drying to obtain a finished product after the film is formed. The method has the advantages that the interface contact is adjusted by utilizing the self structure of natural macromolecules of the shell membrane powder and the mineralization process, namely the net structure of polyvinylidene fluoride is adjusted, so that the solid polymer electrolyte is in better contact with an electrode, the growth direction of dendritic crystals is effectively adjusted, lithium deposition is uniform, and the assembled battery realizes long circulation stability.

The present application relates to the technical field of all-solid-state lithium metal battery, and particularly relates to a solid-state polymer electrolyte and a preparation method and application thereof. In the present application, trifluoroethanol is used to fluorinate eggshell membrane powder in natural eggshell, which is used as a polyethylene oxide-based solid-state polymer electrolyte additive. This can adjust the network structure of the polymer, enhance the electrochemical and mechanical performance of the solid-state electrolyte, inhibit lithium dendrite growth, and enhance the cycle performance of the lithium metal battery. The lithium ion transfer number of the improved solid-state electrolyte battery is determined by chronamperometry, and the lithium ion transfer number is higher, and it is easier to generate fluorinated lithium and lithium oxide, and better inhibit the growth of lithium dendrites. The addition of trifluoroethanol to fluorinate the eggshell membrane solid-state electrolyte in the natural eggshell makes the lithium symmetrical battery and the lithium iron phosphate full battery exhibit excellent performance in various cases.

The invention relates to the technical field of moisture detection, and provides a Karl Fischer reagent for detecting moisture content in cyclic ether compounds by coulomb voltammetry, the Karl Fischer reagent comprises the following raw materials by weight: 7-8 parts of iodine, 330-340 parts of a mixed solution, 60-70 parts of imidazole, 6-7 parts of 2-methylimidazole, and 25-35 parts of sulfur dioxide; the mixed solution comprises ethylene glycol monomethyl ether, trifluoroethanol and diethylene glycol monoethyl ether; the ratio of the weight sum of the trifluoroethanol and the diglycol ether to the weight of the ethylene glycol monomethyl ether is 1: 1; the weight ratio of the trifluoroethanol to the diethylene glycol ethyl ether is (0.5-1.5): 1. According to the technical scheme, the problems of many side reactions and low detection accuracy when the moisture content in the cyclic ether compound is detected in the prior art are solved.

The application provides a preparation method and a packaging method of isoflurane, and belongs to the technical field of halogen-containing acyclic compounds. Trifluoroethanol and difluoro-chloromethane are used as starting materials, a selective fluorine reagent and NaCl solid are added, and the trifluoroethanol and the difluoro-chloromethane are etherified. Under the action of the selective fluorine reagent, the obtained etherification intermediate is chlorinated with NaCl, the reaction temperature of etherification and chlorination is 60-120 DEG C, and one-pot isoflurane preparation without intermediate taking is carried out. The preparation method has simple steps, simple subsequent treatment, and can obtain a product with high purity.

A Ramjet solid fuel comprising up to 50% metal by weight selected from the group consisting of aluminum, boron, boron carbide, magnesium, titanium, and titanium boride; between 2.0 and 9.0 weight percent fluorinated combustion aids selected from the group consisting of 3-hydroxybenzo trifluoride (3HBTF), hydroxyfluoro-2-propanol (HF2P), polytetrafluoroethylene, and trifluoroethanol (TFE); and up to 48% by weight of the remaining component being a hydroxyl terminated, epoxidized polybutadiene polymer (Poly BD 605E) (HO—CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-CH2-CH—(CH═CH2)-CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-OH).

The invention discloses an industrial preparation method of metafluzamide, which comprises the following steps: step S1, reacting 4-aminopyridazine with bromoethane in the presence of a catalyst 4, 7, 13, 16, 21, 24-hexaoxo-1, 10-diazabicyclo [8.8. 8] hexacodecane and an acid binding agent to obtain N-ethylpyridazine-4-amine, and step S2, reacting 4-aminopyridazine with bromoethane in the presence of a catalyst 4, 7, 13, 16, 21, 24-hexaoxo-1, 10-diazabicyclo [8.8. 8] hexacodecane to obtain N-ethylpyridazine-4-amine; s2, reacting methyl isopropyl ketone with hydrazine hydrate to obtain 3-methylbutyl-2-subunit hydrazine, carrying out reduction reaction on the 3-methylbutyl-2-subunit hydrazine to obtain 3-hydrazino-2-methyl butane, and carrying out cyclization reaction on the 3-hydrazino-2-methyl butane and the compound as shown in the formula 1 in the presence of formic acid to obtain a compound as shown in a formula 2; s3, enabling the N-ethylpyridazine-4-amine to react with the compound shown in the formula 2 under the catalytic action of 2, 2, 2-trifluoroethanol, so as to obtain the metafluzamide. According to the present invention, the method has characteristics of simple steps, easily available raw materials, mild reaction conditions and high total yield, and is suitable for industrial production.

The invention relates to the technical field of compound preparation, in particular to a preparation process of 2, 2, 2-trifluoroethyl diphenyl sulfonium trifluoromethanesulfonate. Comprising the following steps: reacting 2, 2, 2-trifluoroethanol, formic acid and acetic anhydride, rectifying the reaction liquid, and collecting a target fraction to obtain 2, 2, 2-trifluoroethyl formate; according to the method, 2, 2, 2-trifluoroethyl formate, diphenyl sulfide and trifluoromethanesulfonic acid are subjected to a reaction, reaction liquid is cooled, solids are separated out, organic solvent washing is carried out, 2, 2, 2-trifluoroethyl diphenyl sulfonium trifluoromethanesulfonate is obtained, the purity can reach 99.7%, and the total reaction yield can reach 78.93%. The preparation process provided by the invention has the advantages of cheap and easily available raw materials, simple operation, high reaction yield, mild reaction conditions, high safety and simple reaction post-treatment, and is suitable for industrial large-scale production.

The application belongs to the technical field of material engineering, and discloses a PMMA film with controllable and reversible transparency and shape, a preparation method and application. The preparation method comprises the following steps: modifying PMMA by carboxylation to obtain carboxylated PMMA; dissolving the carboxylated PMMA in trifluoroethanol, stirring until completely dissolved after 12-24 hours to obtain a carboxylated PMMA solution; and pouring the carboxylated PMMA solution on a polyimide film, and standing until the trifluoroethanol solution is completely volatilized to obtain a PMMA film. The preparation method is simple and suitable for industrialization. The obtained PMMA film has controllable and reversible transparency and shape, and can be used to prepare a PMMA material with controllable and reversible transparency and shape at low cost.

A continuous synthesis and purification method of 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether relates to the technical field of chemical production, and comprises the following steps: S1, in a reaction kettle, trifluoroethanol and tetrafluoroethylene are subjected to an addition reaction in the presence of a catalyst and a solvent; s2, discharging a part of the reaction liquid obtained in the step S1, and carrying out primary distillation to obtain a crude product rich in 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether and a primary distillation kettle bottom material rich in a catalyst, trifluoroethanol and a solvent; s3, returning at least part of the primary distillation kettle bottom material to the reaction kettle, and continuously adding new trifluoroethanol and tetrafluoroethylene into the reaction kettle to realize continuous reaction; and S4, washing and rectifying the crude product obtained in the step S2, so as to obtain a high-purity 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether product, namely the 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether. The continuous synthesis method comprises the following steps: discharging and rectifying a reaction solution by utilizing the boiling point difference of a product, a raw material and a solvent without azeotropy, and returning the raw material to a reaction kettle to continuously participate in the reaction, thereby realizing the continuous synthesis of 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether.

The invention discloses a catalyst for preparing formic acid through electrocatalytic reduction of low-concentration CO2, a preparation method and application, and belongs to the field of CO2 electroreduction. The catalyst is a bismuth-based catalyst modified by proton ionic liquid, the proton ionic liquid is formed by Bronsted acid-base neutralization, the base comprises 1, 8-diazabicyclo [5, 4, 0] undec-7-ene and tetramethylguanidine, and the acid comprises trifluoroethanol, acetic acid and hydrochloric acid. The cation side can be used as a proton donor in a proton / electron pair migration reaction to which CO2 electroreduction belongs, and raw material protons are promoted to be transferred to a reduction intermediate. The electronegativity of the anion side is beneficial to adsorption and activation of a reactant CO2. And anions and cations play a synergistic catalysis role, so that the catalytic reaction activity is greatly improved. A flowing electrolytic tank carrying the catalyst can directly reduce low-concentration CO2 simulating industrial emission waste gas into formic acid at room temperature and normal pressure, and separated and purified CO2 does not need to be used as raw material gas.

The invention relates to the technical field of all-solid-state lithium metal batteries, in particular to a solid-state polymer electrolyte and a preparation method and application thereof. According to the invention, trifluoroethanol is used for fluorinating eggshell membrane powder in natural eggshells, and the fluorinated eggshell membrane powder is used as a polyoxyethylene-based solid polymer electrolyte additive. Therefore, the network structure of the polymer can be adjusted, the electrochemical and mechanical properties of the solid electrolyte are enhanced, the growth of lithium dendrites is inhibited, and the cycle capability of a lithium metal battery is enhanced. The lithium ion transfer number of the improved solid-state electrolyte battery is measured by a chronoamperometry, the lithium ion transfer number is higher, lithium fluoride, lithium oxide and the like are more easily generated, and the growth of lithium dendrites is better inhibited. According to the invention, the egg membrane solid electrolyte in the trifluoroethanol fluorinated natural eggshell is added, so that the lithium symmetric battery and the lithium iron phosphate total battery both show excellent performance under various conditions.

The invention relates to a preparation method of a lithium mono / bis (trifluoroethoxy) phosphate mixture. The method comprises the following steps: 1) dispersing phosphorus pentoxide in an organic solvent I under the protection of an inert gas atmosphere, adding trifluoroethanol, reacting at 20-50 DEG C for 3-6 hours, adding water to hydrolyze a pyrophosphate intermediate after the reaction is finished, and concentrating to obtain mono / bis (trifluoroethoxy) phosphate; and 2) reacting the mono / bis (trifluoroethoxy) phosphate with lithium carbonate in an organic solvent II at 30-70 DEG C for 4-8 hours, and after the reaction is finished, performing post-treatment to obtain the lithium mono / bis (trifluoroethoxy) phosphate mixture. According to the method, phosphorus pentoxide and trifluoroethanol are adopted as raw materials, toxic and harmful chlorination reagents are not used, and the method has the advantages of being simple in process, environmentally friendly and the like. Meanwhile, when the compound is applied to the lithium ion battery as an electrolyte additive, the electrochemical performance of the battery can be remarkably improved.

The invention discloses an anti-fingerprint hydrophobic and oleophobic coating based on a two-dimensional polymer and a preparation method of the anti-fingerprint hydrophobic and oleophobic coating, and relates to the field of coatings. Comprising the following steps: synthesizing a fluorine-containing amphiphilic monomer; synthesizing a two-dimensional amphiphilic polymer; grafting siloxane on the two-dimensional polymer: dissolving the two-dimensional polymer in trifluoroethanol, adding aminopropyl triethoxy siloxane and a condensing agent DCC, and removing the solvent after reaction to obtain an anti-fingerprint treatment agent; dissolving an anti-fingerprint treatment agent in ethyl perfluorobutyl ether to obtain a coating solution; and spraying the coating solution on a base material, and curing to obtain the anti-fingerprint hydrophobic and oleophobic coating. Through the molecular design of the two-dimensional amphiphilic polymer, the synergistic modification of the perfluorinated chain segment and siloxane and the low-cost solution process, the technical bottlenecks of the traditional anti-fingerprint coating in the aspects of wear resistance and light transmittance are successfully solved. The ultra-thin nano structure ensures the optical performance and endows the coating with industrial-grade durability at the same time.

The application discloses a synthesis method of an axially chiral biaryl quinoline nitrogen oxygen compound and belongs to the field of organic chemistry. With racemic 1-aryl isoquinoline nitrogen oxide 1 and acrylic ester 2 as raw materials, palladium trifluoroacetate / N-acetyl-L-alanine as a catalyst, silver carbonate as an oxidant, 1,4-p-benzoquinone and trifluoroethanol as additives, asymmetric alkenylization reaction occurs in 1,2-dichloroethane / acetonitrile mixed solvents, and two types of axially chiral biaryl quinoline nitrogen oxygen compounds are obtained. The kinetic resolution method has the advantages of good resolution effect (up to 102.7), high yield and high enantioselectivity (up to 99%), and the like, and the remaining raw material can be derived through two steps to obtain a commercial (R)-QUINAP ligand.

The invention relates to 3, 3 '-(3-dimethylamino-5-trifluoroethanol-2, 4, 6-triazine)-formamido-biphenol as well as a preparation method and application of the 3, 3'-(3-dimethylamino-5-trifluoroethanol-2, 4, 6-triazine)-formamido-biphenol, and the 3, 3 '-(3-dimethylamino-5-trifluoroethanol-2, 4, 6-triazine)-formamido-biphenol has the following structural formula as shown in the specification. Different functional groups are introduced to biphenol, a new material is obtained, and compared with a traditional biphenol material, the novel material has better electrical conductivity, abrasion resistance, moisture resistance, cold resistance and the like, and can meet the requirements of different application scenes when used as a liquid crystal material.

The invention belongs to the field of preparation of biological nano materials, and discloses an oriented polylactic acid nanofiber membrane with piezoelectric property and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: S1, adding poly-L-lactic acid and polyethylene oxide into trifluoroethanol, stirring and dissolving, and adding magnesium silicide to obtain a spinning solution; and S2, carrying out electrostatic spinning on the spinning solution, collecting an oriented fiber membrane, and carrying out vacuum drying to obtain the oriented polylactic acid nanofiber membrane. The oriented polylactic acid nanofiber membrane prepared by the preparation method disclosed by the invention has excellent piezoelectric property and high orientation, can release hydrogen when encountering water, and can be applied to piezoelectric sensors and ischium application repair materials.

The invention relates to the technical field of pharmaceutical chemicals, in particular to a NiO-TiO2 / gamma-Al2O3 catalyst, a preparation method and application of the NiO-TiO2 / gamma-Al2O3 catalyst in preparation of trifluoroethylamine from trifluoroethanol. The preparation method of the NiO-TiO2 / gamma-Al2O3 catalyst comprises the following steps: dissolving citric acid in absolute ethyl alcohol, adding tetra-n-butyl titanate, stirring, adding nickel nitrate hexahydrate, and stirring until the nickel nitrate hexahydrate is completely dissolved; and adding gamma-Al2O3 into the mixed solution, stirring, evaporating the solvent in an oil bath, drying in a drying oven, grinding a solid sample after drying, putting the solid sample into a crucible, roasting, and cooling and grinding a final product to obtain the NiO-TiO2 / gamma-Al2O3 catalyst. By adopting the NiO-TiO2 / gamma-Al2O3 catalyst prepared by the invention, trifluoroethylamine can be continuously synthesized by catalyzing trifluoroethanol through a fixed bed.

The invention belongs to the technical field of material engineering, and discloses oriented superfine fibers capable of slowly releasing curcumin and magnesium ions as well as a preparation method and application of the oriented superfine fibers. The preparation method comprises the following steps: chelating magnesium ions with oximation modified curcumin to obtain a curcumin-magnesium ion chelate; l-polylactic acid, polyethylene oxide and the curcumin-magnesium ion chelate are dissolved in trifluoroethanol, and oriented superfine fibers are prepared through high-voltage electrostatic spinning. The fiber can be made into a fiber bundle or a fiber membrane, slow release of curcumin and magnesium ions can be achieved in a physiological environment, the functions of a biological scaffold and dual medication can be achieved at the same time, and the preparation process is simple and short in time.

The invention belongs to the technical field of synthesis of aliphatic fluorine-containing intermediates, and in particular to a method for preparing 2,2,2-trifluoroethanol from 1,1,1-trifluoro-2-chloroethane. The method for preparing 2,2,2-trifluoroethanol from 1,1,1-trifluoro-2-chloroethane is as follows: using 1,1,1-trifluoro-2-chloroethane as a starting material, adding a metal and a solvent, and after the reaction is completed, oxidation and hydrolysis are performed to obtain a crude product of 2,2,2-trifluoroethanol, which is purified and decolorized by distillation to obtain a finished product of 2,2,2-trifluoroethanol. The method for preparing 2,2,2-trifluoroethanol from 1,1,1-trifluoro-2-chloroethane provided by the present invention has high purity, few impurities, and greatly reduces the amount of reagents used, and is an environmentally friendly preparation method.

The invention relates to the field of organic synthesis, in particular to a preparation method of tembotrione acid, which comprises the following steps: taking 2-chlorotoluene as an initial raw material, taking supported aluminum trichloride as a catalyst, carrying out related reaction steps to obtain 2-chloro-3-methyl-4-methylsulfonyl methyl benzoate, carrying out alkylation with sodium trifluoroethoxide, carrying out alkaline hydrolysis, and acidifying to obtain the tembotrione acid. According to the method, the yield and purity of tembotrione acid are improved by adding the supported aluminum trichloride as the catalyst, and the bromine is adsorbed on the activated carbon and then reacts, so that the preparation method has the advantages of low cost, high yield and purity, recoverable catalyst, low toxicity, high safety, mild reaction conditions and suitability for industrial production.

The invention provides a polyamide 66-para-aromatic polyamide hybrid nanofiber membrane and a preparation method thereof, and belongs to the technical field of special fibers. The preparation method comprises the following steps: by taking polyamide 66 as a raw material, dissolving the polyamide 66 in a mixed solution of formic acid and trifluoroethanol, and stirring until the polyamide 66 is completely dissolved to obtain a polyamide 66 spinning solution; the preparation method comprises the following steps: by taking para-aramid chopped fibers as a raw material, adding an organic solvent and a cosolvent, centrifuging, taking supernate, adding N, N-dimethylacetamide, diluting to a spinning concentration, and adding a spinning aid, thereby obtaining a para-aramid spinning solution; under the condition of an anisotropic high-voltage power supply, the polyamide 66 spinning solution and the para-aramid spinning solution are subjected to conjugate electrostatic spinning, and the polyamide 66-para-aromatic polyamide hybrid nanofiber membrane is obtained. A special polyamide 66-para-aromatic polyamide hybrid system is constructed, the preparation process is simple and convenient, the preparation time is greatly shortened, and efficient continuous spinning and collection of the polyamide 66-para-aromatic polyamide hybrid nanofiber membrane are achieved.

The application discloses a preparation method of biodegradable high-performance polylactic acid multi-scale fiber membrane, and specifically comprises the following steps: preparing polyquaternary ammonium salt-10 by adding isopropanol as a solvent, ETA solution and hydroxyethyl cellulose into isopropanol for reaction; preparing a precursor solution by dissolving the polyquaternary ammonium salt-10 and polylactic acid particles in 2,2,2-trifluoroethanol; the introduction of the polyquaternary ammonium salt-10 improves the conductivity and viscosity of the solution, enhances the electric field force suffered under the high-voltage electrostatic field of the jet flow and promotes the instability of the charged jet flow in the electrostatic spinning, so that the jet flow is split to form extremely fine fibers; and the polylactic acid multi-scale fiber membrane with superfine nanofibers and submicron fibers is prepared by one-step method. Compared with the existing preparation process, the application has the advantages of simple process, easy operation, high production efficiency, excellent filtering performance and filtering stability of the prepared polylactic acid multi-scale fiber membrane to fine particles of different particle sizes and even the most penetrating PM 0.3 and excellent light transmittance, and is fully biodegradable and green and environment-friendly.

The invention discloses a carbon fiber sizing agent as well as a preparation method and application thereof, and relates to the technical field of carbon fiber materials. According to the preparation method, trifluoroethanol, maleic anhydride, a catalyst, epoxy resin, a sulfonating agent, a neutralizer and water are taken as raw materials, and a mixed reaction step is regulated and controlled, so that the obtained modified self-emulsifying epoxy resin has amphipathy. An oleophylic epoxy group is reserved at one end of a main chain and can be similarly compatible with other auxiliaries, so that the interface bonding capacity of the fiber and a resin matrix can be improved; a sulfonic acid group and fluorine atoms are introduced to the other end of the sizing agent, the sizing agent can be compatible with an aqueous solution, the hydrophilic sulfonic acid group can improve the hydrophilicity of the sizing agent, a fluorocarbon bond has relatively large electronegativity and huge bond energy, and the fluorine atoms repel each other, so that the dispersity and film-forming property of an emulsion can be improved. The amphiphilic modified epoxy resin with the structure has self-emulsifying capacity when being mixed with an aqueous solution. According to the preparation method provided by the invention, the epoxy resin insoluble in the aqueous solution can be dissolved in the aqueous solution under the action of high-speed shearing.

An electrochemical cell includes a negative electrode including a metal, metal alloy, or an electrode active material that reversibly intercalates and de-intercalates cations; a positive electrode including (i) an electrode active material that reversibly intercalates and de-intercalates cations or anions, or (ii) an inert host that reversibly catalyzes an external reactant; a separator between the negative electrode and the positive electrode; and an electrolyte including one or more alcohol-based solvents, with one or more salts. The solvents may include methanol, ethanol, isopropanol, triglycerol, 2,2,2-trifluoroethanol, an organic small molecule or macromolecule that contain at least one hydroxyl (OH) group, or a combination thereof. The electrochemical cell may include a mixture of multiple alcohol-based solvents or a mixture of the one or more alcohol-based solvents with water, mixed at select ratios. The electrochemical cell may include one or more additives having a concentration range between 0.01% to 20% by weight.