75 results about "Diiodomethane" patented technology

The invention relates to a superhydrophobic oleophobic modification method of a porous membrane, and belongs to the technical field of separation membrane. According to the present invention, based on the self-cleaning bionic principle, fluorosilane-modified SiO2 nanoparticles having low surface energy are dispersed in an organic solution to prepare a uniform dispersion liquid, and a porous membrane is subjected to superhydrophobic oleophobic modification by using a dynamic filtration method to prepare the amphiphobic composite membrane having good stability, wherein the water contact angle of the amphiphobic composite membrane surface can achieve 167.3+/-1 DEG C, the contact angle of diiodomethane can achieve 145.9+/-1 DEG C, and the good amphiphobic property is presented; and method has characteristics of no requirement of complex equipment, simple and easy-performing process and short preparation period, and the prepared membrane has characteristics of high flux and good pollution resistance.

The invention relates to a super-hydrophobic and super-oleophobic epoxy resin coating and a preparation method thereof. The super-hydrophobic and super-oleophobic epoxy resin coating comprises the following components in parts by weight: 10 parts of fluorinated modified epoxy resin; nano particles accounting for 1-30% of the mass of the fluorinated modified epoxy resin; micron particles accounting for 1-30% of the mass of the fluorinated modified epoxy resin; a curing agent accounting for 5-50% of the mass of the fluorinated modified epoxy resin; a solvent, 3-20ml of the solvent being added into each gram of the fluorinated modified epoxy resin; and a hydrophobic modifier of which the mass is 1-2 times of the addition mass of the nano or micron particles. Compared with the prior art, the water contact angle of the coating is greater than 155 degrees, the contact angles with glycerol and ethylene glycol are greater than 150 degrees, the contact angle with diiodomethane is greater than 135 degrees, the adhesive force of the coating is the optimal level of 0, the coating does not fall off under the adhesion of an adhesive tape, and the coating is a super-hydrophobic and super-oleophobic coating with strong adhesive force and long service life, has excellent friction resistance, acid and alkali resistance and icing resistance, and has a wide application prospect.

A coating film to prevent a conspicuous fingerprint has a water contact angle of no less than 60° so that most of water contained in fingerprints on the coating film evaporates without forming a layer adsorbed on the coating film. Further, the coating film has lipophilicity and has a diiodomethane contact angle of no more than 45° so that the coating film exhibits enhanced affinity to fingerprints, which primarily contain oily components.

The present invention relates to a kind of synthetic method of food spice 1,2,3,5,6-pentathiocycloheptane, the steps are as follows: firstly thiating: in a three-necked reaction flask equipped with a stirrer, a constant pressure dropping funnel, and a thermometer Add sodium tetrathiocarbonate and absolute ethanol to the mixture and stir until sodium tetrathiocarbonate is completely dissolved. Add the absolute ethanol solution of diiodomethane dropwise with a constant pressure dropping funnel within 2 hours at 25°C. Stir and react at a constant temperature of 25°C for 10 hours; second extraction: dilute the above reaction solution with water, then extract three times with cyclohexane, separate the water layer and combine the extracts, add anhydrous calcium chloride for drying; finally obtain the finished product by distillation. The invention provides an edible spice 1,2,3,5,6-pentathiacycloheptane with strong characteristic fragrance, good antibacterial activity and biological activity. The process is simple and the yield is high, and it can be safely used as a spice in It is a new type of mushroom flavor during frying, frying, cooking, frying and other cooking processes.

The invention relates to the technical field of glass detection and especially provides a detection method of surface energy of glass. The detection method includes the following steps: controlling temperature to be 18-22 DEG C and relative humidity to be 40-60%; cleaning a to-be-tested glass surface; selecting any three from diiodomethane, distilled water, formamide, ethylene glycol and glycerol as detection fluids, of which surface energy parameters are known, and measuring equilibration time that the detection fluids are equilibrated on the to-be-tested glass surface; selecting at least three dropping points on the of the to-be-tested glass surface and performing measurement with a contact angle measuring instrument, and calculating the average value of measurement data, which is the equilibration contact angle of the detection fluids on the to-be-tested glass surface; and calculating the surface energy of the glass according to formulas. The method has quick speed, high precision, good stability and low environmental pollution.

The immersion oil has refractive index which is 1.70 or more, and is low autofluorescence. Preferably, the main ingredient is iodine compounds (diiodomethane), and a solid having a high refractive index such as sulfur and the like is dissolved or dispersed into the immersion oil. The production method of the immersion oil has a purification process, in which impurities are removed preferably by adsorbent, distillation or recrystallized. In the method of preservation of the immersion oil, it is always contacted with the adsorbent. The preservation container of the immersion oil contains an adsorbent which is always contacted with the immersion oil.

A semiconductor-wafer-surface-protective adhesive tape having a pressure-sensitive adhesive layer on a substrate film, wherein the thickness of the adhesive layer is 10mum or more, the surface free energy (gammas) of the surface of the adhesive layer is 30-35 mN/m, the contact angle (thetal I) in relation to diiodomethane is 54-60 DEG , the adhesive force in relation to an SUS280 polished surface at 23 DEG C is 0.8-4.3 N/25mm, and the adhesive force in relation to the SUS280 polished surface when heat-releasing at 50 DEG C in comparison to the adhesive force when releasing at 23 DEG C is 50% or less.

The invention discloses a modification method of a microporous polymer with a high nitrogen content, and application of the microporous polymer with the high nitrogen content in gas absorption and catalyst carrier or energy storage. The modification method comprises the following steps: mixing the microporous polymer with the high nitrogen content and potassium carbonate, grinding the mixture, andthen placing the ground mixture in a container; injecting N, N-dimethylformamide, and carrying out microwave oscillation; injecting diiodomethane in a nitrogen atmosphere for carrying out a reaction;washing the reactant, and drying. The modification method provided by the invention adopts a super-crosslinking reaction, the microporous polymer with the high nitrogen content and diiodomethane react in presence of a alkali, so that -NH- imine bonds and C-I bonds are enabled to react with each other, hydrogen iodide is removed, and C-N bonds are generated; the C-N bonds also endow the polymer with excellent redox property; the two C-I bonds in the diiodomethane are similar to a crosslinked scaffold, and can both expand the accumulated chain segments in the polymer and enable the interior ofthe polymer to be subjected to a cross-linking reaction, so that the specific surface area of the polymer is enlarged. The microporous polymer with the high nitrogen content has a better application value in the fields such as gas adsorption, catalyst carrier storage and energy storage.

The invention relates to edible spice lenthionine. The lenthionine comprises the following raw materials in part by weight: 18 to 20 parts of sodium tetrathiocarbonate, 18 to 20 parts of diiodomethane, 140 to 160 parts of absolute ethyl alcohol and 90 parts of carbon tetrachloride. The lenthionine (also named 1,2,3,5,6-pentasulfide cycloheptane) prepared by the invention is widely applied to sauce products, meat products, convenient food and seasoning bouillon series, has pure, true and strong flavor, rich meat and good taste, can cover bad peculiar smell and resist to high temperature, is an ideal option for canned mushroom, mushroom sauce, the convenient food and seasoning and has a wide market prospect.

The invention discloses a reverse osmosis flame-retardant waterproof layer. The reverse osmosis flame-retardant waterproof layer comprises 2-5 parts of tetrahydrofuran, 11-16 parts of diiodomethane, 20-30 parts of PVC resin, 10-13 parts of stabilizer, 9-13 parts of propylene carbonate, 3-9 parts of phenylcarbinol, 9-12 parts of dibutyl phthalate, 5-7 parts of dimethylethanolamine, 3-5 parts of anti-foaming agent, 2-7 parts of tetrahydrofuran, 8-12 parts of propenol, 13-18 parts of nitroethane, 9-13 parts of glycol, 15-18 parts of crosslinking agent, 3-7 parts of sodium tetraborate, 4-9 parts of mixed phosphate, 13-18 parts of plasticizer, 11-13 parts of auxiliary material, 22-28 parts of expansive fire-retardant system, 28-33 parts of ATO powder, 11-15 parts of E-20 epoxy resin, 22-25 parts of alcohol-soluble acrylate resin, 18-22 parts of fire retardant, 5-7 parts of thickening agent, 15-18 parts of coalescing agent, 1-3 parts of tetrahydrofuran, 11-13 parts of sodium silicate, 3-7 parts of 2-butoxyethanol, 22-25 parts of wood fiber powder, 28-31 parts of carbon fiber powder, 9-15 parts of coalescing agent, 12-16 parts of barium sulfate, 3-7 parts of lime powder and 11-13 parts of auxiliary material.

The invention belongs to the field of the synthesis of anti-hepatitis C virus medicines by using medical intermediates, and particularly relates to an asymmetric synthesis method of a medical intermediate 2-azabicyclo [3. 1. 0] hexane-2, 3-tert-butyl dicarbonate. The asymmetric synthesis method is mainly characterized in that (2R) or (2S)-1, 2-tert-butyl dicarbonate-2, 3-pyrrole alkene is used as a raw material, methylbenzene, benzene or trihalomethylbenzene is used as a solvent, diiodomethane, chlorobromomethane, dibromomethane or diethylzinc is used as a cyclopropanation reagent, and after reaction, the compound 2-azabicyclo [3. 1. 0] hexane-2, 3-tert-butyl dicarbonate is obtained. The asymmetric synthesis method has the advantages that synthesis steps are simple, the yield is high, the cost is low, the cyclopropanation reagent is wide in selectivity, the synthesis process is simple, convenient and practical, and the like.

The invention discloses a membrane preparation method combining construction of nanoparticles and a membrane surface microstructure, belonging to a preparation method of a surface microstructure membrane. The invention aims to solve the problem of membrane pollution caused by poor hydrophobicity, poor oleophobicity and insufficient durability in existing membrane distillation technology. The membrane preparation method comprises the following steps: 1, preparing a PVDF base membrane casting solution; 2, preparing a membrane for membrane distillation, wherein the surface of the membrane is provided with a regular cylindrical concave array; 3, loading silicon dioxide nanoparticles; and 4, reducing surface energy to form a membrane formed by combined construction of the nanoparticles and the membrane surface microstructure. The maximum values of static contact angles of the membrane, formed by combined construction of the nanoparticles and the membrane surface microstructure, with water and diiodomethane are 170 degrees and 157 degrees respectively, and a super-amphiphobic level is achieved, so the membrane has excellent anti-pollution performance. The invention provides the method for preparing the membrane by combining the nanoparticles with the membranemembrane surface microstructure.

The invention relates to a [<18>F]-fluoromethyl triphenylphosphine salt, a preparation method and application thereof, and effectively solves the problem of low ratio of myocardial uptake and non-target organs in existing myocardial perfusion imaging agents. The method includes: dissolving silver p-toluenesulfonate in acetonitrile, adding diiodomethane under stirring, conducting heating reflux, performing cooling to room temperature, filtering out light yellow solids, removing the solvent by spinning, and eluting and purifying the residue to obtain bis(p-toluenesulfonyl)-methane; under nitrogen protection, adding a [<18>F] fluoride solution into a K2.2.2 solution and a K2CO3 solution, performing drying, adding acetonitrile, conducting drying again, adding bis(p-toluenesulfonyl)methane and anhydrous acetonitrile into the dried substance, carrying out reaction, and performing cooling to room temperature, conducting column chromatography, adding an acetonitrile solution containing triphenyl phosphine to carry out reaction, and then performing cooling, filtering, column purification, solvent removal, normal saline dissolution and filtering, thus obtaining the [<18>F]-fluoromethyl triphenylphosphine salt. The [<18>F]-fluoromethyl triphenylphosphine salt provided by the invention has the characteristics of high cardiac and myocardial uptake, fast clearance rate in main organs, and high heart blood ratio, heart-lung ratio and heart-liver ratio, low cost, and can acquire clear heart Micro-PET images.

The invention belongs to the technical field of optical grade polyester films, and particularly relates to a light weather resistant optical grade PET rigid film. The hardening film is prepared from the raw materials of UV curing resin, a photoinitiator, polytetrafluoroethylene, organosilane, montmorillonoid, n-hexadecane, diiodomethane and cyclohexanone, the hardening film adopts UV curing hardening liquid, thus the hardness of the hardening film is large on the basis of the small thickness, the screen protection ability is high, the polytetrafluoroethylene, the organosilane and the montmorillonoid make surface energy of the hardening film low, thus the hardening film is prevented from being deformed by influence of the low temperature, a silicon oxygen bond in the organosilane has long bond length, large bond angle and easy internal rotation, molecules are helical, methyl groups are arranged outwardly and rotated around the silicon oxygen bond, the surface energy is very low, the good hydrophobic and oleophobic properties are achieved, the surface of the hardening film is not prone to being dirty, and the visual effect of a screen is affected to the low extent while the screen isprotected.

The invention discloses a preparation method of drospirenone, which aims at solving the problems of high production cost, low yield, and poor product quality in the existing preparation method of the drospirenone. The preparation method comprises the steps of: taking 3beta, 5-dyhydroxy-15beta, 16beta-methylene-5beta-androstane-6 alkene-17-ketone as materials, firstly, reacting with diiodomethane and zinc-copper couple, introducing 6beta and 7beta cyclopropane structures, then orderly carrying out condensation reaction and esterification reaction in THF (tetrahydrofuran) solution of lithium metal and 3-methyl bromopropionate and DMF (dimethyl formamide) solution of sodium ethoxide, finally oxidizing by sodium hypochlorite, and dewatering the toluenesulfonic acid to obtain the drospirenone. According to the preparation method, the efficiency is high, the production cost is low, by-products are few, special demands on production equipment do not exist, the reaction condition is mild, the process is stable, the operation is convenient, the environment is prevented from being damaged, and the large-scale industrial production is facilitated. The product obtained by the method is stable in quality, high in yield and purity and free of purification.

A laminated film includes a substrate film and layer A provided at least on one side thereof, layer A containing (1) a (poly)caprolactone segment and (2) a urethane bond, wherein a distilled water contact angle on layer A and a diiodomethane contact angle on layer A are 95° or more, but less than 120° and 70° or more, but less than 87°, respectively.

The invention discloses a synthesis method of pentacyclic [6.3.1.0<2, 7>.0<3, 5>.0<9,11>] dodecane to solve the problem of low yield. The invention uses dicyclopentadiene and diiodomethane as materials, comprises following steps of: (1) setting a reaction bottle in an ultrasonic reactor, adding and mixing zinc copper alloy, dicyclopentadiene, diiodomethane, iodine and ethers organic solvent; (2) starting the ultrasonic reactor, in which the reaction temperature is 30 DEG C - 50 DEG C, the reaction time is 0.5h-5h; (3) filtering the reaction liquid, removing the catalyst, decompressing the distillation filtering liquid so as to obtain pentacyclic [6.3.1.0<2, 7>.0<3, 5>.0<9, 11>] dodecane. The invention is short in reaction time, high in yield, and is mainly used in synthesis of pentacyclic [6.3.1.0<2, 7>.0<3, 5>.0<9, 11>] dodecane.

The invention belongs to the technical field of organic synthesis of sulfur-containing compounds and discloses a thioether compound and a synthetic method and application thereof. The thioether compound is prepared by the following steps: mixing acetone, a disulfide compound, inorganic base and 18-crown ether-6, heating and stirring, reacting under the action of a catalyst of inorganic base in theair atmosphere, concentrating and purifying to prepare the thioether compound. The molecular structural formula of the thioether compound is as shown in the formula (1) in the specification, whereinR1 and R2 are selected from hydrogen atom, alkyl group, alkoxy group, nitro group, amino group, hydroxyl group, halogeno, acyl group, aryl group or heterocyclic group. The use of high-toxicity halohydrocarbon, such as dichloromethane and diiodomethane is avoided by the method. The synthetic method has simple steps, is simple to operate and is feasible, is environmentally-friendly and has high conversion rate under mild conditions. Yield of the product reaches up to 96%. The thioether compound can be applied in the field of preparation of organic synthetic intermediates.

The invention discloses a method for synthesizing a 2/6-iodo-purine derivative through visible light induced hydrazine removal-iodination reaction, and belongs to the technical field of medicine synthesis. In an organic solvent, a 2-hydrazino purine derivative or a 6-hydrazino purine derivative and diiodomethane are used as raw materials and react at room temperature under the irradiation of visible light in the presence of a photocatalyst to obtain the 2-iodopurine derivative or the 6-iodopurine derivative. According to the method for converting hydrazino into iodo, heating is not needed, only visible light irradiation is adopted, use of an additional oxidizing agent is avoided, the cost is low, operation is easy, and the safety coefficient is high.

The invention discloses a high-purity grade diiodomethane purifying method used for photovoltaic material used for a photovoltaic material. The method comprises the following steps: 1)an industrial grade diiodomethane raw material is absorbed by passing through an adsorption column equipped with modified 2-acrylamide-2-methul propanesulfonic acid copolymer medium to obtain a filtrate; 2)passing a filtrate through a quartz purification and rectification apparatus, under vacuum condition, removing preceding fraction, collecting a distillation fluid; and 3)filtering and processing the distillation fluid to obtain the high-purity grade diiodomethane used for photovoltaic material. According to the invention, the modified 2-acrylamide-2-methul propanesulfonic acid copolymer medium is employed for column adsorption, and has strong adsorption capability to impurity ions in a solution, and has strong adsorption capability to hydroxy impurity, free iodine, moisture, and metal ions in industrial grade diiodomethane, and impurity can be effectively removed. According to the invention, the purifying process operation is simple, cost is reduced, yield is increased, and the obtained product quality is stable.