54 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.

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%.

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

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.

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 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.

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.

The invention relates to a polymer essentially made up of, or consisting of, repeating motifs from vinylidene fluoride (VDF), trifluoroethylene (TrFE), and at least one third monomer different from vinylidene fluoride and trifluoroethylene, the TrFE:VDF molar ratio between the number of moles of motifs from trifluoroethylene and those of motifs from vinylidene fluoride in the polymer being from 14.0:86.0 to 50.0:50.0, said at least one third monomer having a mole fraction xt greater than or equal to 1 ppm and less than or equal to 5000 ppm, relative to the total number of moles of motifs from VDF and TrFE in the polymer.

The invention discloses a preparation method capable of improving the yield of trifluoroethylene, which comprises the following steps: in the presence of an organic solvent, mixing 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane, a metal dehalogenating agent and an activating agent for reaction, then cooling and dropwise adding water into the reaction system to obtain trifluoroethylene, the activating agent is 1, 2-dibromo-1, 2, 2-trifluoroethane, and the metal dehalogenating agent is 1, 2-dibromo-1, 2, 2-trifluoroethane. The catalyst is selected from at least one of 1, 2-dibromoethane, bromoethane and dichloroethane. An activating agent is added into a reaction system, the activating agent serves as an efficient initiator, the activating agent is heated to decompose and release free radicals, the free radicals reduce oxides on the surface of a metal dehalogenating agent, reaction active sites of the metal dehalogenating agent are exposed, reaction of 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane and the metal dehalogenating agent is facilitated, and the metal dehalogenating agent can be used for dehalogenating 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane. Therefore, the conversion rate of the reaction is effectively improved, and the yield of trifluoroethylene is improved.

A composition comprising 1,1-difluoroethane, propane, and at least one substance selected from the group consisting of trifluoroethylene and trans-1,2-difluoroethylene, wherein the total content of 1,1-difluoroethane, propane, and trifluoroethylene or trans-1,2-difluoroethylene is 90.0 mass % or more with respect to the total amount of the composition, the global warming potential is at most 65, and the heat of combustion is at most 28.000 MJ / kg.

The invention belongs to the technical field of refrigerants, and particularly relates to a low-GWP alternative refrigerant for R410A as well as a preparation method and application of the low-GWP alternative refrigerant. The alternative refrigerant is a near azeotropic mixture and comprises the following components in parts by weight: 25 to 35 parts of difluoromethane (R32), 35 to 55 parts of 1, 1, 1, 2, 2-pentafluoroethane (R125) and 20 to 30 parts of 1, 1, 2-trifluoroethylene (R1123). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for directly replacing an air conditioning system without modifying existing equipment.

The present invention provides a composition comprising a refrigerant (mixed refrigerant) having three types of performance, i.e., a coefficient of performance (COP) and refrigerating capacity (Cap) that are equivalent to or higher than those of R410A, and a sufficiently low GWP. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising CF3I, CO2 (R744), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)—HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).

A method includes forming a polymer solution having a crystallizable PVDF-family polymer and a liquid solvent, forming a gel from the polymer solution, forming a polymer thin film from the gel by calendering or solid state extrusion, stretching the polymer thin film, and applying an electric field to the polymer thin film to form a poled polymer thin film, where an electromechanical coupling factor (k31) of the poled polymer thin film is at least approximately 0.1. The polymer thin film may include up to approximately 90 wt. % of an additive and may be characterized by a bimodal molecular weight distribution of a crystallizable polymer where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. In some examples, the polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc.

A method for preparing 2,3,3,3-tetrafluoropropene by a two-step method, the method comprising: A1. a telomerization step: preparing 3-chloro-1,1,1,2-tetrafluoropropane by pressure telomerization reaction of monofluoromonochloromethane and trifluoroethylene under the action of a telomerization catalyst; the telomerization catalyst is a Lewis acid catalyst or a mixed catalyst of a Lewis acid catalyst and dichloromethane; A2. a dehydrochlorination step: 3-chloro-1,1,1,2-tetrafluoropropane is dehydrochlorinated under the catalysis of activated carbon to obtain 2,3,3,3-tetrafluoropropene. The present application has the advantages of simple process, high product selectivity, mild reaction conditions and the like.

The application provides a preparation method of a solid-state polymer electrolyte film, comprising the following steps: adding poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer and a lithium salt into a solvent, uniformly mixing to obtain a mixed solution, and drying the mixed solution to obtain the solid-state polymer electrolyte film. In the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer, the molar content of trifluoroethylene is 25.4% to 29.4%, and the molar content of chlorotrifluoroethylene is 6% to 10%. The preparation method uses poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer as a polymer matrix, and combines the control of the molar content of each monomer to prepare a solid-state polymer electrolyte film with high ion conductivity and lithium ion transference number. The application also provides a solid-state polymer electrolyte film prepared by the above method and a lithium metal battery comprising the solid-state polymer electrolyte film.

This composition contains: trifluoroethylene or trans-1,2-difluoroethylene; difluoromethane; propane; and 1,1-difluoroethane. The composition has a global warming potential of at most 150, and a heat of combustion of at most 28.000 MJ / kg.

The present invention relates to a method for purifying trifluoroethylene. The present invention also relates to a trifluoroethylene composition and to the use thereof as etching gas.