33 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 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.

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 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 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 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.

The application belongs to the technical field of intelligent nanometer materials, and relates to a shape memory micro-topological structure nanometer fiber membrane as well as a preparation method and application thereof. The preparation method is as follows: a fiber membrane is prepared through electrostatic spinning with trifluoroethanol as a solvent; after the fiber membrane is stretched and fixed, in-situ polymerization is carried out in a tris-hydroxymethyl aminomethane buffer to obtain a left-handed polylactic acid / polyhydroxybutyrate valerate@polydopamine fiber membrane; and the surface micro-topological structure is regulated by controlling the temperature to make the fiber retract. The nanometer fiber membrane prepared by the application has both shape memory performance and a regulatable surface micro-topological structure, and the process is simple and the cost is controllable, so the application is suitable for the fields of biomedicine, intelligent materials and the like.

The invention discloses a solid form of a quinazoline derivative and a preparation method thereof. The invention provides a crystal form of a compound as shown in a formula II, in which X is an organic solvent, water or a combination thereof, and n is all numerical values between 0 and 1; the organic solvent is selected from trifluoroethanol, an ether solvent and a combination thereof; wherein the ether solvent is selected from methyl tert-butyl ether, ethylene glycol dimethyl ether and tetrahydrofuran; the crystal form is a crystal form XT-1-I, a crystal form XT-1-II, a crystal form XT-1-III or a crystal form XT-1-IV. The crystal form XT-1-I provided by the invention has good mechanical stability and physical and chemical stability, and has better solubility and purification effect.

The present application relates to a kind of nitrogen-rich fibrous gelatin-based separator for lithium-sulfur battery and its preparation method and application, comprising the following steps: gelatin and glucose are added to deionized water and trifluoroethanol mixed solvent, while adding hydroxyapatite, after heating and stirring uniformly, spinning solution is obtained, first gelatin fiber film is obtained by electrospinning;The obtained fiber film is subjected to heat crosslinking, high-temperature carbonization treatment to obtain fibrous carbon film;Prepare gelatin spinning solution, and pure second gelatin fiber film is prepared by electrospinning;The fibrous carbon film after carbonization and the second gelatin fiber film are assembled to obtain the nitrogen-rich gelatin-based separator.The present application uses gelatin as the main body of lithium-sulfur battery diaphragm, doped with hydroxyapatite, which has a strong adsorption effect on polysulfide after carbonization, and the fibrous carbon layer with long-range conductivity has a positive effect on the reuse of polysulfide, inhibits the shuttle effect, and improves the cycle performance of battery.

The application discloses a synthesis method of allyl trifluoroethyl ether compounds. Allyl methyl ether is used as raw material, trifluoroethanol is used as solvent, Lewis acid is used as catalyst, additives and alkali are added, and selective nucleophilic substitution of methyl ether on different types of C in the allyl position is realized by controlling the reaction temperature, so that the allyl trifluoroethyl ether compounds are obtained with high selectivity. The application has the advantages of high efficiency, mild reaction condition, convenient operation, short reaction time, few by-products and the like, and is suitable for large-scale production.

The invention discloses an OCA optical cement composition and a preparation method thereof, and belongs to the technical field of OCA optical cement, the OCA optical cement composition comprises the following raw materials by weight: 9-15 parts of a benzene ring substituted acrylate monomer, 6-10 parts of a flexible monomer, and 10-12 parts of trifluoroethanol methacrylate (CF3CH2CH2OCH2C (O) OCH3) as a comonomer, 3-9 parts of an acrylate monomer with amino and carboxyl, 2-5 parts of a photoinitiator compound photoinitiator, 3-9 parts of a thermal initiator and 0.1-0.3 part of a polymerization inhibitor. According to the present invention, the optical adhesive can maintain the good flexibility, and can well disperse the stress when subjected to the external force impact so as to improve the impact resistance of the polymer, and the optical adhesive has the heat resistance during the use process, and does not easily produce the yellowing problem caused by the self-polymerization reaction at the high temperature.

The application provides an application of a strain of Tolypocladium inflatum ZJPH2105 in preparing a chiral aromatic alcohol through asymmetric reduction of an aromatic ketone. The product obtained through catalysis of the strain of Tolypocladium inflatum ZJPH2105 has an e.e. value of greater than 99.9%, the strain is green and safe, easy to cultivate, and rich in source, and the conversion process does not need to add expensive coenzyme, and has the characteristics of low cost, green and environment-friendly conversion process and the like. The application uses the strain of Tolypocladium inflatum ZJPH2105 as a biological catalyst to reduce 4'-bromo-2,2,2-trifluoroacetophenone, when the substrate concentration is 10 mM, the yield of the target product (S)-1-(4-bromophenyl)-2,2,2-trifluoroethanol can reach 98.2%, and the e.e. value is greater than 99.9%.

The invention relates to the technical field of lithium batteries, in particular to a preparation method and application of an asymmetric perfluoropolyphosphazene nanofiber solid electrolyte. The preparation method comprises the following steps: carrying out ring opening polymerization on phosphonitrilic chloride trimer, respectively grafting trifluoroethanol and octafluoropentanol on two sides of a main chain to prepare asymmetric perfluoropolyphosphazene, and preparing the flexible nanofiber solid electrolyte with a three-dimensional network structure through an electrostatic spinning process. According to the preparation method and application of the asymmetric perfluoropolyphosphazene nanofiber solid electrolyte, the electrolyte has high ionic conductivity, a wide electrochemical window and excellent thermal stability and flexibility, is stable in contact with a positive electrode interface and a negative electrode interface, and has great application potential in a high-voltage lithium ion battery system.