86 results about "Trifluoroethene" patented technology

The invention discloses a perovskite solar cell based on a cross-linked interface passivation layer, and relates to the technical field of photovoltaic cell materials. The perovskite solar cell sequentially comprises a transparent conductive substrate, an electron transport layer, a perovskite light absorption layer, a crosslinking interface passivation layer, a hole transport layer and a metal electrode from bottom to top, and the cross-linked interface passivation layer is made of a 4-[10-(4-{(1, 2, 2-trifluorovinyl) oxy} phenyl)-10H-phenoxazine-2-yl] phenylphosphonic acid material. The cross-linked interface passivation layer can significantly improve the photovoltaic performance and stability, the intrinsic stability of the device is greatly enhanced by the cross-linked network, and in a double-85 aging test of 85 DEG C / 85% RH, the time required for attenuating the efficiency of the device to 80% of an initial value can exceed 1000 hours.

Provided is a working medium for a heat cycle, including trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane, in which a proportion of 1,1-difluoroethane with respect to a total of trifluoroethylene and 1,1-difluoroethane is 57.5% by mass or less, a proportion of trifluoroiodomethane with respect to a total of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane is 24.5% by mass or less, and a total proportion of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane with respect to the working medium for a heat cycle as a whole is 75.0% by mass or more.

The present invention discloses a method and system for producing hexafluorobutadiene, which includes the following steps: In step (1), an organic solution of bromotrifluoroethylene and zinc powder are respectively introduced into a first reactor containing an initiator, zinc powder, and an organic solvent, followed by a second reactor, and reacted to obtain a trifluorovinylzinc bromide solution. The reaction solution is then introduced into a precipitator to separate excess zinc powder, resulting in a zinc-free trifluorovinylzinc bromide solution. The excess zinc powder is then filtered and reused. In step (2), the trifluorovinylzinc bromide solution obtained above and a pre-prepared composite catalyst solution are introduced into a third reactor and subjected to a coupling reaction to obtain crude hexafluorobutadiene. In step (3), the crude hexafluorobutadiene obtained above is purified to obtain a product with a purity of ≥ 99.9%.

The invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, the process comprising the steps of:-providing a reactor containing a liquid reaction medium comprising water,-introducing into said reactor an ethylene monomer and a fluorinated monomer selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof, the invention relates to a method for producing a fluorinated surfactant, comprising the steps of:-adding a reaction medium to a reactor,-pressurizing the reactor,-feeding a redox initiator into the reactor to initiate polymerization, the redox initiator comprising an oxidizing agent and a reducing agent, where the reducing agent in the redox initiator does not contain sulfur atoms having an oxidation number of 4 or less, and where the reaction medium does not contain a fluorinated surfactant.

Provided are: a binder in which the interface resistance between a current collector and an electrode material layer in a positive electrode of a sodium ion battery is reduced and battery characteristics are improved; and an electrode mixture, an electrode, and a secondary battery using the binder. A binder for a positive electrode of a sodium ion battery, the binder containing a copolymer having a vinylidene fluoride unit (A) and a structural unit (B) derived from at least one type of monomer selected from the group consisting of trifluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, a monomer represented by general formula (1), a monomer represented by general formula (2), and a monomer represented by general formula (3), and does not have a tetrafluoroethylene unit. [Formula 1] # imgabs0 # (In the formula, Rf1 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having 1-12 carbon atoms, and when both the fluorinated alkyl group and the fluorinated alkoxy group have 2 or more carbon atoms, an oxygen atom (-O-) may be included between carbon atoms. ) (In the formula, Rf2 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having 1 to 12 carbon atoms, and when both the fluorinated alkyl group and the fluorinated alkoxy group have 2 or more carbon atoms, an oxygen atom (-O-) may be included between carbon atoms. ) [chemical formula 3] # imgabs2 # (In the formula, R1, R2, and R3 are each independently a hydrogen atom, a chlorine atom, or an alkyl group having 1-5 carbon atoms. And X represents a single bond or an atomic group having a molecular weight of 500 or less and having a main chain comprising 1-20 atoms. And Y represents an inorganic cation and / or an organic cation).

Mechanically and piezoelectrically anisotropic polymer fibers may be formed by spinning a polymer solution or gel that includes a high molecular weight crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the spun fibers. The polymer solution may also include a low molecular weight additive. The high and low molecular weight polymers may each be characterized by a bimodal molecular weight distribution where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. The polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The spun fibers may be oriented, annealed, poled, and woven or laminated to form a polymer thin film having a high elastic modulus and a high electromechanical coupling factor.

The invention provides novel azeotrope-like compositions and separation processes utilizing the same. An azeotrope-like composition comprising 1,2-difluoroethylene (HFO-1132) and hydrogen fluoride. An azeotrope-like composition comprising 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride. A separation process for a composition comprising at least one member selected from the group consisting of trans-1,2-difluoroethylene (HFO-1132(E)), cis-1,2-difluoroethylene (HFO-1132(Z)), and 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride.

The invention discloses a polymer proppant suitable for supercritical CO2 fracturing, a preparation method comprises the following steps: S1, modifying an inorganic monomer by using a coupling agent to obtain a modified inorganic monomer; s2, taking an organic monomer A, an organic monomer B and a modified inorganic monomer as raw materials, and preparing polymer microspheres through an emulsion polymerization method; the organic monomer A is one of methyl methacrylate, methyl acrylate or styrene; the organic monomer B is vinylidene fluoride or trifluoroethylene; and S3, putting the polymer microspheres prepared in the step S2 into a plasma reaction cavity, filling CF4 gas to carry out plasma reaction, carrying out fluorination treatment on the surfaces of the polymer microspheres, finally cooling to room temperature, and carrying out vacuum drying to obtain the polymer proppant. The polymer proppant is suitable for supercritical CO2 fracturing, through PVDF copolymerization, inorganic monomer filling and fluorination modification, the swelling resistance of the polymer is effectively enhanced, and the swelling effect induced by supercritical CO2 is resisted.

The invention discloses an environment-friendly refrigeration composition for compression refrigeration, the ODP value of the environment-friendly refrigeration composition is 0, the GWP is less than 150, and the refrigeration composition comprises hexafluoropropylene serving as a first component and accounting for 30-50% of the total mass of the refrigeration composition; the trifluoroethylene is used as a second component and accounts for 30-50% of the total mass of the refrigeration composition; the third component is selected from at least one of cyclopropane, difluoromethane or trifluoroacetyl fluoride, and the mass of the third component accounts for 10-30% of the total mass of the refrigeration composition. The refrigeration composition can replace R410A to be used for a household air conditioner or a commercial air conditioner system, parts of the air conditioner system do not need to be replaced, the environmental performance is far better than that of the R410A, and the cycle performance is equivalent to or slightly better than that of the R410A.

A working medium for a heat cycle includes trifluoroethylene, a low boiling point compound having a lower boiling point than the boiling point of the trifluoroethylene, and high boiling point compounds having higher boiling points than the boiling point of the trifluoroethylene. In the working medium, the low boiling point compound is at least one selected from the group consisting of carbon dioxide, R116, and R41, and the high boiling point compounds are at least two selected from the group consisting of HFC-32, HFO-1234yf, HFO-1234ze (E), HFO-1243zf, PFC-14, HFC-134, HFC-143a, HFC-227ea, cyclopropane, isobutene, isobutane, dimethyl ether, and ammonia. An application of the working medium is provided.

To provide an electrode for a Li-ion battery by a solvent-free deposition technique on a metal substrate.SOLUTION: A Li-ion battery electrode comprising an active filler for an anode or a cathode, an electronically conductive filler and a fluoropolymer binder, said binder consisting of a mixture of two fluoropolymers: a non-functional fluoropolymer A and a fluoropolymer B having at least one functionality, wherein said fluoropolymers A and B contain at least one fluoromonomer selected from vinyl fluoride; vinylidenefluoride (VDF); trifluoroethylene (VF3); chlorotrifluoroethylene (CTFE) and the like, and wherein said fluoropolymer B comprises a monomer unit having at least one carboxylic functional group.SELECTED DRAWING: None

The present invention relates to a process for producing trifluoroethylene in a reactor provided with a fixed catalytic bed comprising a catalyst, said process comprising a step a) of reacting a composition A comprising chlorotrifluoroethylene with hydrogen in the presence of a catalyst and in the gas phase to produce a stream B comprising trifluoroethylene, characterized in that said composition A also comprises at least one of the additional compounds C1 chosen from the group consisting of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, hexafluorocyclobutene, fluoroethane, 2-chloro-1,1,1-trifluoroethane, 1,2-dichlorohexafluorocyclobutane. The present invention also relates to a chlorotrifluoroethylene composition.

The invention discloses a polyvinylidene fluoride-trifluoroethylene piezoelectric sensor and a preparation method of the polyvinylidene fluoride-trifluoroethylene piezoelectric sensor. The sensor sequentially comprises a piezoelectric film layer, stretchable conductive electrode layers located on the two sides of the piezoelectric film layer and a flexible packaging layer on the outermost layer from inside to outside. The preparation method comprises the following steps: dissolving polyvinylidene fluoride-trifluoroethylene, gallium-indium eutectic liquid metal and a dispersant polyvinylpyrrolidone in N, N-dimethylformamide, and carrying out ultrasonic homogenization and magnetic stirring to prepare a uniform spinning solution; preparing a fiber membrane with a directional arrangement structure by utilizing an electrostatic spinning technology and a rotary drum receiving device; carrying out annealing treatment on the fiber membrane; and finally, a stretchable electrode is attached and packaged. The sensitivity of the prepared sensor can reach 0.424 V N-1 at most, the elongation at break is 150%-180%, and the sensor has cycling stability and is suitable for monitoring human motion.

Provided is a method for producing a fluoropolymer without using an emulsifier even when using a water-based medium with a small environmental load. A method for producing a fluoropolymer, wherein at least one fluoromonomer selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, and vinylidene fluoride is polymerized in the presence of a specific polymer containing at least one unit selected from the group consisting of a unit based on a compound represented by the following formula (1) and a unit based on a compound represented by the following formula (2) in a water-based medium to produce a fluoropolymer (wherein, in the case of polymerizing the tetrafluoroethylene, the tetrafluoroethylene is polymerized under the condition that the content of the unit based on tetrafluoroethylene in the fluoropolymer is less than 99 mass% relative to all units of the fluoropolymer). Formula (1) CXY=CR 1 -COO-(L-O) n -R 2 Formula (2) CXY=CR 3 -(O) m -CH2-Z-R 4

The present invention relates to a process for producing trifluoroethylene in a reactor equipped with a fixed catalytic bed comprising a catalyst, said process comprising a step a) of reacting a composition A comprising chlorotrifluoroethylene with hydrogen in the presence of a catalyst and in the gas phase in order to produce a stream B comprising trifluoroethylene, characterized in that said composition A also comprises at least one of the additional compounds C1 chosen from the group consisting of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, hexafluorocyclobutene, fluoroethane, 2-chloro-1,1,1-trifluoroethane and 1,2-dichlorohexafluorocyclobutane. The present invention also relates to a chlorotrifluoroethylene composition.

This invention discloses a moisture-proof and dust-proof epoxy paint and its preparation method, belonging to the field of coating technology. The moisture-proof and dust-proof epoxy paint disclosed in this invention, by weight, comprises the following raw material components: 100 parts by weight of high-temperature resistant epoxy resin, 0.8-1.2 parts by weight of curing agent, 8-12 parts by weight of waterproof silicone resin, 4-6 parts by weight of defoamer, 5 parts by weight of leveling agent, 10-15 parts by weight of solvent, and 1-3 parts by weight of antistatic agent. The high-temperature resistant epoxy resin is obtained by epoxidation after grafting 1-bromo-4-(trifluorovinyloxy)benzene, cashew nut shell powder, and hexachlorocyclotriphosphazene. The waterproof silicone resin is obtained by polycondensation of 3-glycidyl etheroxypropyltriethoxysilane and tetraethyl orthosilicate followed by end-capping with 4-[trifluorovinyl(oxy)phenyl]dimethylsilane.

A working medium for heat cycles, which contains trifluoroethylene, 1, 1-difluoroethane, and trifluoroiodomethane, and wherein the ratio of 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to trifluoroethylene, 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less. The ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 24.5 mass% or less, and the ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 75.0 mass% or more relative to the entire working medium for heat cycles.

The present invention relates to a binder composition for a sulfide-based solid electrolyte comprising: a binder including a repeating unit derived from vinylidene fluoride, a repeating unit derived from trifluoroethylene, and a repeating unit derived from chlorotrifluoroethylene; and a non-aqueous solvent.

The invention discloses a preparation process of high-crosslinking high-elasticity modified rubber for an aerator, and relates to the technical field of modified rubber.The preparation process comprises the steps that 1, p-nitrophenoxy trifluorovinyl ether is synthesized; (2) carrying out thermal cyclization dimerization to prepare 1, 3-bis (4-nitrophenoxy) perfluorocyclobutane; (3) reducing nitryl to prepare 1, 3-bis (4-aminophenoxy) perfluorocyclobutane; 4) epoxidizing nitrile rubber; 5) cross-linking modification; the perfluorocyclobutane rigid diamine cross-linking agent is synthesized and is subjected to amine-epoxy reaction with epoxidized nitrile rubber to form a three-dimensional network formed by firm covalent bonds and inert fluorocarbon nodes, so that the rubber has high elasticity, extremely low permanent deformation, excellent aging resistance and super-long service life; and the core problems that the aerator is easy to age and the performance attenuation is fast in a severe environment are solved.

Production of HFO-1132 and, in particular, HFO-1132E, is produced from chlorotrifluoroethylene (CTFE) and / or trifluoroethylene (HFO-1123). In a first step, 1,1,2-trifluoroethane (HFC-143) is produced by hydrogenating chlorotrifluoroethylene (CTFE) and / or trifluoroethylene (HFO-1123) by reaction with hydrogen in the presence of a catalyst at a temperature of between about 75°C and about 225°C. The 1,1,2-trifluoroethane (HFC-143) may then be dehydrohalogenated in the presence of a catalyst to produce trans-A,2-difluoroethylene (HFO-1132E) and cis-1,2-difluoroethylene (HFO-1132Z). The cis-1,2-difluoroethylene (HFO-1132Z) may then be isomerized to produce trans-A,2-difluoroethylene (HFO-1132E).

Provided is a production method for chlorotrifluoroethylene and trifluoroethylene, which does not use freon and uses inexpensive raw materials that are by-products of Ishikawa reagent, and which can easily produce the chlorotrifluoroethylene and trifluoroethylene. Provided is a production method for chlorotrifluoroethylene, which includes: (A3) a process A3 of decarboxylating 2,3,3,3-tetrafluoro-2-chloropropionic acid in an anhydrous state in the presence of a base to obtain the above-described chlorotrifluoroethylene; or (B3) a process B3 of chlorinating trifluoroethylene to obtain the above-described chlorotrifluoroethylene.

The present invention provides a composition for a thermal cycle system containing HFO-1123 and HFO-1234yf, which contains a working medium with cycle performance that can replace R410A while suppressing the impact on the greenhouse effect, and a thermal cycle system using the composition. A composition for a thermal cycle system containing a working medium for thermal cycle with a greenhouse effect coefficient (100 years) lower than 675 in the 4th report of the Intergovernmental Panel on Climate Change (IPCC), which contains trifluoroethylene and 2,3,3,3-tetrafluoropropene, and a thermal cycle system using the composition for a thermal cycle system.

Provided is a method for producing chlorotrifluoroethylene and trifluoroethylene by bringing a raw material composition containing 1,1,2-trichloro-1,2,2-trifluoroethane, hydrogen, and water into contact with a catalyst, the composition having a water content of 200 ppm by mass or less with respect to the entire raw material composition, to produce chlorotrifluoroethylene and trifluoroethylene through a reaction between the 1,1,2-trichloro-1,2,2-trifluoroethane and hydrogen.

In a battery using a negative electrode made of metal, the battery life is improved by reducing the amount of gas generated, reducing resistance, and reducing the amount of precipitation of metal elements such as Mn and Ni in the positive electrode in the negative electrode. The secondary battery has a negative electrode in which a fluorine polymer is laminated on a layer containing metal and has a liquid electrolyte, wherein the metal is at least one selected from lithium, sodium, magnesium, and zinc, and the fluorine polymer is a copolymer having a vinylidene fluoride unit (A) and a constituent unit (B) derived from at least one monomer selected from the group consisting of tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene, a monomer represented by general formula (1), a monomer represented by general formula (2), and a monomer represented by general formula (3), and the liquid electrolyte is characterized by containing a fluorinated ether.

The application discloses a perovskite solar cell based on a cross-linking interface passivation layer and relates to the technical field of photovoltaic cell materials. The perovskite solar cell comprises, from bottom to top, a transparent conductive substrate, an electron transport layer, a perovskite light absorption layer, a cross-linking interface passivation layer, a hole transport layer and a metal electrode. The cross-linking interface passivation layer is a 4-[10-(4-{1,2,2-trifluorovinyl)oxy}phenyl)-10H-phenoxazine-2-yl]phenylphosphonic acid material. The cross-linking interface passivation layer can significantly improve the photovoltaic performance and stability, and the cross-linking network greatly enhances the intrinsic stability of the device. In a double 85 aging test at 85 DEG C / 85%RH, the time required for the device efficiency to decay to 80% of the initial value can be more than 1000 hours.

Disclosed in the present invention are a preparation method and a production system for hexafluorobutadiene. The preparation method comprises the following steps: step (1), respectively sequentially introducing an organic solution of bromotrifluoroethylene and zinc powder into a first reactor and a second reactor each filled with an initiator, zinc powder and an organic solvent for a reaction to obtain a trifluoroethylene zinc bromide solution, and then introducing the reaction solution to a sedimentation device to separate excessive zinc powder to obtain a zinc power-free trifluoroethylene zinc bromide solution, wherein the excessive zinc powder is filtered and then recycled; step (2), introducing the obtained trifluoroethylene zinc bromide solution and a pre-prepared composite catalyst solution into a third reactor for a coupling reaction to obtain a crude hexafluorobutadiene product; and step (3), purifying the obtained crude hexafluorobutadiene product to obtain a product having a purity more than or equal to 99.9%. The present invention has the advantages of a high bromotrifluoroethylene conversion rate, low coupling composite catalyst cost, mild reaction conditions, a high product purity, high safety, etc.

A synthesis method of electronic-grade hexafluorobutadiene comprises the following steps: adding alkali, a phosphino ligand, a catalyst and an organic solvent into a reaction container, adding a stannane coupling reagent under the protection of inert gas, then cooling a reaction kettle, then adding halogenated trifluoroethylene, heating the reaction kettle, maintaining the reaction time for 2-24 hours, and after the reaction is finished, cooling the reaction kettle to obtain the electronic-grade hexafluorobutadiene. According to the method, a one-step coupling method is adopted, operation is easy and convenient, the problems of yield loss and separation of multi-step synthesis are solved, reaction conditions are mild, energy consumption is low, byproducts are few, high-selectivity conversion can be achieved through an optimized catalytic system, and the method is suitable for industrial production. Meanwhile, the raw materials are easy to obtain, the three wastes are few, and the industrial application potential is remarkable.