791 results about "Perfluoropolyether" patented technology

To provide a perfluoropolyether compound expressing excellent surface tension reduction performance, and expressing excellent foamability and foam stability not only during diluting fresh water but also during diluting sea water, and a fluorine-based surface active agent including the compound.SOLUTION: A perfluoropolyether dicarboxylic acid compound or a salt thereof is expressed by the following formula (1). In the formula, Rf1 represents a 1-4C perfluoroalkyl group. R1 represents a substituted or unsubstituted 1-10C hydrocarbon group. R2 represents a substituted or unsubstituted 1-6C hydrocarbon group. R3 and R4 are same or different and each represent a substituted or unsubstituted 1-4C hydrocarbon group. n is an integer of 0-5.SELECTED DRAWING: None

The invention discloses a composite modified material for a lithium niobate wafer, and relates to the technical field of nano materials. The material is composed of an anti-corrosion passivation matrix and a function enhancement component, wherein the anti-corrosion matrix adopts a silicon nitride / SiO2 multi-layer composite layer, atomic layer deposition titanium dioxide and magnetron sputtering aluminum oxide to form cascade protection; the functional layer comprises lead sulfide nanoparticles and nano silicon dioxide, and is directionally modified by a silane coupling agent and a perfluoropolyether surfactant. During preparation, PbS nano-particles are synthesized by combining a PECVD-ALD-magnetron sputtering stepped deposition process (200-150 DEG C) with a solvothermal method, and finally, the PbS nano-particles are formed through spin coating-annealing (300-400 DEG C). The optical loss of the material under the wavelength of 1550 nm is smaller than 0.2 dB / cm, the acid and alkali corrosion resistance is larger than 240 h, the lead dissolution rate is smaller than 0.1 ppm, the interface state density is reduced by 2 orders of magnitude, the contradiction between lithium niobate wafer surface degradation, photoelectric property degradation and lead-containing material environment risk is solved, and the material is suitable for 5G optical waveguide and quantum integrated device packaging.

The invention discloses a forming device and a forming method of a high-temperature-resistant low-temperature-resistant high-toughness cable. According to the invention, based on a double-substrate synergistic system of hydrogenated nitrile rubber and polyether type thermoplastic polyurethane, and in combination with a dynamic vulcanization crosslinking technology, the cable keeps excellent flexibility and tear resistance in a wide temperature range of-60 DEG C to 125 DEG C. A three-dimensional reinforced network of nano silicon dioxide and carbon nanotubes is directionally dispersed in a matrix, and mechanical support of aramid short fibers is matched, so that the cable is endowed with bending fatigue resistance, the durability of the drag chain cable in a high-frequency torsion scene of an oil platform exceeds 30 million cycles is realized, and the service life of the drag chain cable is prolonged. The problem of breakage caused by low-temperature embrittlement and high-temperature softening of a traditional cable is fundamentally solved, the synergistic effect of the perfluoropolyether surface modifier and the composite anti-aging system enables the cable to form a stable protective layer in strong acid, strong alkali, salt mist and oil stain environments, and chemical corrosion and ultraviolet irradiation are effectively resisted.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention discloses a high-performance fluororubber sealing material and a preparation method thereof, and relates to the technical field of fluororubber. The high-performance fluororubber sealing material comprises the following components in parts by weight: 100 parts of raw fluororubber, 20-35 parts of modified fluororubber, 4-8 parts of maleic anhydride grafted ethylene propylene diene monomer, 20-35 parts of a reinforcing agent, 2.5-3.5 parts of a vulcanizing agent and 4-8 parts of an auxiliary agent. Wherein the modified fluororubber is prepared by reacting amino-containing perfluoropolyether, amino-terminated cyclotriphosphazene and epoxy-terminated liquid fluororubber; the reinforcing agent is obtained by uniformly mixing polydopamine coated silicon dioxide and carbon black and then modifying the mixture with (3, 3, 3-trifluoropropyl) methyldimethoxysilane. By combining the modified fluororubber, the maleic anhydride grafted ethylene propylene diene monomer and the reinforcing agent, the processability, the mechanical property, the high temperature resistance and other properties of the fluororubber are effectively enhanced synergistically.

The invention discloses a perfluoropolyether blended PEGDE-based solid electrolyte and a preparation method thereof, and belongs to the technical field of lithium metal battery solid electrolyte materials. Adding SnCl4 and TAA into the nanocellulose precursor solution, stirring, carrying out suction filtration, and drying to obtain a SnS2 (at) NC support layer; and mixing and stirring PEGDE, LiDFOB, LiTFSI and PFPE to obtain PEGDE-based solid electrolyte slurry, coating the SnS < 2 > (at) NC supporting layer with the PEGDE-based solid electrolyte slurry, and performing in-situ polymerization in a drying oven to obtain the PEGDE-based solid electrolyte. The ultrathin perfluoropolyether blended PEGDE-based solid electrolyte prepared based on PEGDE in-situ polymerization and perfluoropolyether blending and in combination with nanocellulose enhancement has the advantages of stable anode interface, high mechanical strength, high decomposition voltage and high ion transference number.

The invention discloses an antifouling wear-resistant auxiliary agent and a preparation method and application thereof, and belongs to the technical field of fluorine-containing functional preparations, the antifouling wear-resistant auxiliary agent is prepared from the following raw materials by mole: 1-2 parts of single-ended active perfluoropolyether alcohol PFPE-OH; 1 to 2 parts of isophorone diisocyanate; 1 part of nano silicon dioxide containing hydroxyl groups on the surface; 2 to 5 parts of monoisocyanate containing unsaturated bonds; 2 to 25 parts of acrylic acid hydroxyl ester; 40 to 400 parts of a comonomer; 2-20 parts of a reaction active monomer; the reactive monomer contains an unsaturated bond and is used for side chain grafting. The antifouling wear-resistant auxiliary agent comprises a nano silicon dioxide hybrid multi-branched polymer containing a perfluoropolyether group, contains a plurality of unsaturated sites, is suitable for a UV curing coating system, and can significantly improve the antifouling and anti-fingerprint characteristics and wear resistance of the surface of a coating.

The invention relates to the technical field of polymer electrolyte, in particular to a perfluoropolyether-terminated single-ion polymer, a preparation method and application thereof, and a battery comprising the single-ion polymer. A scheme for synthesizing a brand new polymer is adopted, a perfluoropolyether-terminated single-ion polymer is provided, the key point is focused on PEO-based electrolyte window voltage, lithium ion transference number and inhibition of PEO-based electrolyte lithium metal battery negative electrode dendritic crystal growth, the polymer is blended with PEO through the design of the polymer, and the PEO-based electrolyte lithium metal battery negative electrode dendritic crystal growth is inhibited. Therefore, the performance of the PEO-based lithium metal battery is improved.

A gel polymer electrolyte for a lithium battery and a lithium battery including the gel polymer electrolyte are disclosed. The gel polymer electrolyte includes a gel polymer and a liquid electrolyte, the gel polymer may be i) a crosslinked product of a polyfunctional acryl-based monomer having 3 or more polymerizable functional groups, or ii) a crosslinked product of a first polymerizable monomer and a second polymerizable monomer, the first polymerizable monomer being a polyfunctional acryl-based monomer having 3 or more polymerizable functional groups, and the second polymerizable monomer being one or more selected from among a urethane acryl-based monomer having two or more polymerizable functional groups and a polymerizable monomer having two or more polymerizable functional groups and containing a perfluoropolyether unit, wherein the liquid electrolyte includes a lithium salt, an organic solvent, and butyronitrile, and the lithium salt may include lithium difluoro(oxalato)borate and lithium tetrafluoroborate.

To provide other technique for suppressing corrosion by plasma of a joint part joining a plate-like part and a base part, in a holding device.SOLUTION: A holding device includes a plate-like part formed into a plate shape, a base part which supports the plate-like part and is formed into a plate shape, a joint part which is arranged between the plate-like part and the base part and is composed of a resin adhesive bonding the plate-like part and the base part, and a protective member coating at least a part of the outer peripheral surface of the joint part, wherein the protective member contains a matrix resin which has a skeleton of perfluoropolyether and contains a matrix resin containing a resin component the same as the resin adhesive.SELECTED DRAWING: Figure 1

The invention relates to an insulating material, in particular to a voltage-breakdown-resistant high-insulation EPDM material and application thereof, and the voltage-breakdown-resistant high-insulation EPDM material comprises the following components: modified silicone rubber, 4, 4 '-thiobis (6-tert-butyl o-cresol), a composite filler, a cross-linking agent, 4-isopropoxybenzoic acid and an EPDM matrix; according to the voltage-breakdown-resistant high-insulation EPDM material disclosed by the invention, the comprehensive performance of the material is greatly improved and the application field of the EPDM material is widened through the matching of all the components and the specific dosage ratio of the components. The modified silicone rubber is introduced, the modified silicone rubber is obtained by modifying vinyl-containing perfluoropolyether-b-polysiloxane, in the vinyl-containing perfluoropolyether-b-polysiloxane, a perfluoropolyether chain segment has extremely low surface energy and good chemical stability, and a polysiloxane chain segment endows the vinyl-containing perfluoropolyether-b-polysiloxane with excellent flexibility and electrical insulating property.

The invention belongs to the technical field of fluorine chemical industry, and particularly relates to a method for treating trace perfluoropolyether carboxylic acid and perfluoropolyether acyl fluoride in perfluoropolyether, which comprises the following steps: treating perfluoropolyether containing trace perfluoropolyether carboxylic acid and / or perfluoropolyether acyl fluoride by using a metal compound, converting the perfluoropolyether carboxylic acid and / or perfluoropolyether acyl fluoride into perfluoropolyether carboxylate, and heating and decomposing the perfluoropolyether carboxylate to form trace olefin; and reacting the fluorinating agent diluted by the protective gas with the formed trace olefin to convert the trace olefin into the perfluoropolyether oil. Compared with the prior art, the method solves the problems that in the prior art, a trace amount of perfluoropolyether acyl fluoride and perfluoropolyether carboxylic acid in perfluoropolyether cannot be fully removed, so that an existing product contains acid and is subjected to acid regurgitation in the using process; according to the scheme, complete decomposition and conversion of perfluoropolyether carboxylic acid can be achieved, meanwhile, olefin is prevented from being formed, and the problems that the product contains acid and the acid regurgitation phenomenon in the follow-up using process is solved.

The invention provides chlorotrifluoroethylene continuously prepared based on a microchannel reactor and a preparation method of the chlorotrifluoroethylene, and the chlorotrifluoroethylene comprises the following raw materials in parts by weight: 1, 1, 2-trifluoro-1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature refrigerant refrigerant is prepared from the following components in parts by weight: 90 to 100 parts of 1, 2-trichloroethane, 1 to 5 parts of a zinc fluoride induced palladium-copper bimetallic catalyst, 8 to 15 parts of a cyclohexyl dimethyl ether-formic acid composite hydrogen donor, 0.5 to 2 parts of trifluoroacetic anhydride, 0.1 to 0.5 part of a perfluoropolyether lubricant, a proper amount of a low-temperature mixed refrigerant and 15 to 20 percent by weight of diluted hydrochloric acid. According to the invention, the preparation efficiency and product purity of chlorotrifluoroethylene can be improved, and stable operation of the preparation system and reasonable treatment of byproducts can be guaranteed.

The invention provides energy storage battery immersed cooling liquid based on fluorinated nanofluid and a preparation method, and belongs to the technical field of heat management of energy storage equipment, the energy storage battery immersed cooling liquid comprises 74-84% of perfluoropolyether base liquid, 10-15% of surface modified boron nitride nanosheets, 5-8% of microencapsulated perfluorohexanone and 1-3% of polydimethylsiloxane modified silicon dioxide. Microencapsulated perfluorohexanone is integrated into the cooling liquid to achieve the dual functions of heat dissipation and fire extinguishment, and synergistic effects are generated in the aspects of heat conduction, insulation, fire extinguishment and the like through combined use of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and polydimethylsiloxane modified silicon dioxide and specific modification performance of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and the polydimethylsiloxane modified silicon dioxide. And experimental data can prove that the comprehensive performance of the material has substantive features and remarkable progress in the aspects of heat conductivity coefficient improvement, fire extinguishing time and the like.

The invention relates to the technical field of optical films, and discloses a PET-based composite optical film and a preparation method thereof.The optical film is prepared from 100 parts of PET master batch, 5-10 parts of anti-blue-light nanofiller and 1-3 parts of interfacial compatibilizer through melt extrusion, asynchronous two-way stretching, online anti-fingerprint coating liquid coating and cooling and rolling; the blue-light-resistant nano filler is a core-shell structure filler prepared by taking KH570 silanized nano cerium oxide as a core, polymerizing by grafting glycidyl methacrylate to form a shell layer, and then reacting with 1H-benzotriazole-1-methanol. The anti-fingerprint coating liquid is prepared from perfluoropolyether modified siloxane acrylate and nano silicon dioxide sol. Through core-shell filler design and functional coating online coating, the technical problems that inorganic nanoparticles are easy to agglomerate and organic small molecule auxiliary agents are easy to migrate are synergistically solved, and the obtained optical film has excellent properties of high light transmittance, low haze, efficient blue light resistance and lasting fingerprint resistance and is good in durability.

The invention belongs to the technical field of perfluoropolyether fluorosilicone oil preparation, and particularly relates to polyvinyl perfluoropolyether fluorosilicone oil and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out ring-opening reaction on tetramethyl tetravinyl cyclotetrasiloxane and cyclosiloxane to prepare polyvinyl polysiloxane, then carrying out reaction on the polyvinyl polysiloxane and perfluoropolyether trimethoxy silane to prepare polyvinyl perfluoropolyether fluorosilicone oil; the modified catalyst, which is prepared by carrying out a reaction on 1, 2, 5-g] isoquinoline and 2-iodopropane to prepare modified organic alkali and then carrying out a reaction on the modified organic alkali, tris (pentafluorophenyl) boron and mercaptan, has relatively high reaction activity, and avoids the difficulty in impurity removal by using a plurality of catalysts; the perfluoropolyether trimethoxy silane, which is prepared by reacting perfluoropolyether alcohol with allyl chloroformate and then carrying out addition with trimethoxy silane, has excellent mechanical properties. The preparation process is relatively simple, addition and use of a fluorine-containing solvent in the reaction process are reduced, and the prepared product contains more vinyl functional groups and has higher crosslinking degree and corrosion resistance.

The application discloses an aluminum alloy surface fine polishing polishing composition, polishing liquid and application thereof, and particularly belongs to the technical field of metal surface treatment. The polishing composition comprises the following components in mass fraction: 70-80 parts of silica sol, 1-4 parts of dispersing agent, 5-7 parts of surfactant, 5-10 parts of corrosion inhibitor, and 0.5-2 parts of water-retaining agent; and the surfactant is composed of perfluoropolyether, coconut oil alkylolamide and sodium dodecyl benzene sulfonate. The polishing composition provided by the application has high polishing efficiency, can reduce polishing cost, improve product quality, has low material surface roughness and few scratches after polishing treatment, effectively improves the polishing surface quality, improves the overall appearance and durability of the material, and the polishing liquid does not contain toxic substances such as chromium / phosphorus, and is environment-friendly.

The invention relates to the technical field of composite materials, in particular to a composite material for a waterproof breathable film and a preparation method of the composite material. The composite material for the waterproof breathable film comprises the following raw materials: PTFE resin, zinc oxide, a surfactant, a compatibilizer and a waterproof filler, the waterproof filler is a porous inorganic carrier material treated by a silane modified waterproof agent; the silane modified waterproof agent is a compound containing a perfluoropolyether chain segment and a siloxane chain segment. According to the prepared composite material for the waterproof and breathable film, the porous filler is subjected to surface modification through the perfluoropolyether-silane coupling agent, and the waterproofness, breathability and mechanical property of the PTFE composite material can be synchronously and synergistically improved.

The invention discloses UV-resistant perfluoropolyether siloxane as well as a preparation method and application thereof, the chemical structural formula of the perfluoropolyether siloxane is as shown in formula I, and in the formula I, m and n are independently integers greater than or equal to 1. According to the invention, two functional groups with different functions, such as the micromolecular UV absorbent and the amino siloxane, are respectively introduced into the dihydroxyl perfluoropolyether, so that the UV resistance, the wear resistance and the like of the coating are remarkably improved, and excellent hydrophobic and antifouling effects are achieved. In addition, due to the existence of multiple silicon-oxygen bonds, the adhesive force of the coating can be effectively enhanced, and the durability is improved. And the formula I of the # imgabs0 # is shown in the specification.

The invention belongs to the technical field of fluorine chemical industry, and particularly relates to a preparation method of high-molecular-weight perfluoropolyether, which comprises the following steps: step A, carrying out addition reaction on perfluoropolyether acyl fluoride through a solid catalyst loaded with a metal compound to obtain an intermediate mixture containing perfluoropolyether ketone and perfluoropolyether olefin; and B, carrying out a fluorination reaction on the intermediate mixture obtained in the step A by using a diluted fluorinating agent to obtain the high-molecular-weight perfluoropolyether. Compared with the prior art, the preparation method has the advantages that the problems of high synthesis difficulty and low yield of high-molecular-weight perfluoropolyether due to overlong molecular chain in the prior art are solved; in order to solve the problem, the inventor of the application successfully develops a new path for preparing the high-molecular-weight perfluoropolyether through a large amount of deep research, and the method prepares a higher-molecular-weight product through an acyl fluoride addition reaction of the two-molecular perfluoropolyether, so that the problem of low yield of the existing high-molecular-weight product is successfully solved.

The invention relates to the technical field of grinding fluid, in particular to efficient grinding fluid for an MPO connector, a preparation method and application of the efficient grinding fluid for the MPO connector. 27%-44% of alpha-aluminum oxide; 8%-15% of a styrene-maleic anhydride copolymer; 2%-5% of a modified polyurea solution; 0.05% to 0.3% of perfluoropolyether; 0.5%-2% of citric acid; 0.5%-1.5% of a polyether modified polysiloxane defoaming agent; by adopting a composite abrasive material system of the nano-diamond and the alpha-aluminum oxide, the grinding efficiency and the surface quality are improved in a breakthrough manner.

The invention discloses an ultrathin composite polyurethane adhesive tape with excellent waterproofness and a preparation method thereof, and relates to the technical field of polyurethane. According to the preparation method, diisocyanate and polyether polyol react to obtain a prepolymer, perfluoropolyether glycol is taken as a chain extender to react with an isocyanate group in the prepolymer, and a fluorine-containing chain segment is introduced, so that the surface free energy of the prepared hydrophobic polyurethane is reduced; then blending and compounding the hydrophobic polyurethane and the modified nano cellulose, so as to prepare composite polyurethane; and further taking the composite polyurethane as an adhesive layer, and adhering the composite polyurethane to a base material to prepare the ultrathin composite polyurethane adhesive tape with the thickness range of 0.1-0.5 mm. The ultrathin composite polyurethane adhesive tape has excellent waterproofness, and has wide application value in the aspects of medical adhesive tapes, sports adhesive tapes and the like.

The invention discloses a low-viscosity high-stability perfluoropolyether-based magnetic liquid and a preparation method thereof, and relates to the technical field of magnetic material preparation, and the preparation method comprises the following steps: preparing composite nano magnetic particles of ferroferric oxide and carbon nanotubes by adopting a chemical in-situ coprecipitation method; coating the composite nano magnetic particles with a perfluoropolyether surfactant; the composite nano magnetic particles are dispersed into the perfluoropolyether oil-based carrier liquid, and the solid content of the composite nano magnetic particles accounts for 5 wt%-20 wt%. Ferroferric oxide and carbon nano tube composite nano magnetic particles are obtained through a chemical precipitation method, the particles are stably dispersed in perfluoropolyether-based carrier liquid under the modification effect of a surfactant, and under the condition of low solid content, the dispersion stability and magnetic field stability of the magnetic liquid are greatly improved; the problem of overheating caused by the fact that high-viscosity magnetic liquid is used for high-rotating-speed sealing is greatly solved.

The invention relates to the technical field of high-end packaging and printing, and discloses a base material back coating and a preparation method thereof, and the base material back coating comprises the following components in parts by weight: 55-70 parts of mixed matrix resin formed by polar modified epoxy acrylate and perfluoropolyether acrylate according to a weight ratio of 4 / 1-9 / 1, according to the invention, self-stratification power generated by viscosity reduction in a heat leveling stage is utilized to drive the components to migrate directionally and construct a gradient interpenetrating network structure, so that the self-stratification effect is improved, and the self-stratification effect is improved; the coating is subjected to continuous chemical transition from the bottom anchoring layer to the surface shielding layer, interface stress concentration generated by physical layering is eliminated, and the interface bonding stability is improved on the premise that the protection strength of the ultrathin coating is guaranteed.

The invention discloses a preparation method of a double-response self-repairing super-hydrophobic coating on the surface of an aluminum alloy. The preparation method is specifically implemented according to the following steps: step 1, preparing sea urchin-shaped photo-thermal particles Fe3O4-at-TiO2; step 2, preparing self-repairing porous boron nitride; 3, preparing thermal response particles by an emulsion method; step 4, carrying out photocuring and dynamic disulfide bond crosslinking modification; and 5, preparing the double-response self-repairing super-hydrophobic coating. The invention also discloses the coating prepared by the method, the light absorption area is increased by preparing the sea urchin-shaped Fe3O4-coated TiO2, and after the two materials form a heterojunction, absorption spectrums complement each other, so that the energy of sunlight can be more efficiently utilized, and the photothermal conversion efficiency is improved. Porous boron nitride (PBN) increases the specific surface area, loads more perfluoropolyether and forms a continuous heat conduction channel through a porous framework to improve the heat conductivity, it is guaranteed that heat can be transmitted to the thermal response shell to the maximum extent, and the thermal response efficiency is improved.

The invention relates to the technical field of organic-inorganic hybrid materials, in particular to an antifouling organic-inorganic hybrid material, a preparation method, a photocuring antifouling material and a product. The organic-inorganic hybrid material is prepared by carrying out a ring-opening addition reaction on an epoxy group of epoxy polyhedral oligomeric silsesquioxane and polydimethylsiloxane with an amino group or perfluoropolyether with a carboxyl group. According to the scheme provided by the invention, the coating has high thermal stability and structural rigidity endowed by epoxy polyhedral oligomeric silsesquioxane and excellent low surface energy antifouling property endowed by amino-containing polydimethylsiloxane or carboxyl-containing perfluoropolyether, and the defect that a pure epoxy polyhedral oligomeric silsesquioxane coating does not have antifouling property is effectively overcome.

The invention relates to the field of medical materials, and particularly discloses a collagen microsphere preparation method based on a micro-fluidic technology, and the preparation method comprises the following steps: preparing a micro-fluidic device which comprises a chip with a coaxial flow channel, a fluid control system and an ultraviolet crosslinking module integrated at the outlet of the chip; preparing an inner phase fluid, an intermediate phase fluid and an outer phase fluid, wherein the inner phase is a modified collagen solution containing a photoinitiator, the intermediate phase is a perfluoropolyether oil phase and contains a surfactant, and the outer phase is a water phase and contains a nonionic surfactant; the three-phase flow velocity is adjusted, and monodisperse W / O / W liquid drops are generated in the micro-fluidic chip; sequentially carrying out low-temperature physical crosslinking and ultraviolet-initiated crosslinking on the W / O / W liquid drops to form cured microspheres; collecting and post-processing the microspheres to obtain the collagen microspheres. According to the preparation method provided by the invention, the natural activity of collagen is reserved, meanwhile, the size of the microspheres is accurately controlled, multiple functions are integrated, and the preparation method is environment-friendly and safe.

In a secondary battery including an electrolyte layer containing a sulfide solid electrolyte, the electrolyte layer has both high voltage resistance and high ionic conductivity. The secondary battery of the present disclosure includes a positive electrode, an electrolyte layer, and a negative electrode, wherein the electrolyte layer contains a sulfide solid electrolyte and a perfluoropolyether represented by formula (1) below:where Rf1 and Rf2 are each independently a C1-16 divalent alkylene group which may be substituted with one or more fluorine atoms, E1 and E2 are each independently a monovalent group selected from the group consisting of a fluorine group, a hydrogen group, a hydroxyl group, an aldehyde group, a carboxylic acid group, a C1-10 alkyl ester group, an amide group which may have one or more substituents, and an amino group which may have one or more substituents, and RF is a divalent fluoropolyether group.

The invention provides a polyurethane composition as well as a preparation method and application thereof. The polyurethane composition is prepared from the following raw materials in parts by weight: 21 to 27 parts of first PU (polyurethane) resin, 10 to 14 parts of second PU resin, 23 to 28 parts of organic silicon modified plasticizer, 17 to 23 parts of carbon black, 16 to 21 parts of filler and 0.1 to 1.0 part of additive. The first PU resin is obtained by polymerizing a polyol compound and a first isocyanate compound. And the second PU resin is obtained by polymerizing a diisocyanate compound and a benzotriazole compound containing an active group and modifying with a perfluoropolyether compound. The organic silicon modified plasticizer is obtained by carrying out chain extension on an organic silicon-containing polyurethane chain segment by virtue of binary secondary amine and then carrying out end capping by virtue of mono-secondary amine. The polyurethane composition has excellent weather resistance, ultraviolet resistance, heat resistance, water resistance and thermal stability, is relatively good in mechanical property and adhesive property, and is very suitable for being used as a sealant or an adhesive in the technical fields of automobiles, buildings, industries and the like exposed in a sunlight irradiation environment for a long time.

A lithium secondary battery including a gel polymer electrolyte. The gel polymer electrolyte includes a gel polymer and a liquid electrolyte, wherein the gel polymer is i) a crosslinked product of a multifunctional acryl-based monomer having three or more polymerizable functional groups, or ii) a crosslinked product of a first polymerizable monomer and a second polymerizable monomer, wherein the first polymerizable monomer is a multifunctional acryl-based monomer having three or more polymerizable functional groups, and the second polymerizable monomer is at least one selected from among a urethane acryl-based monomer having two or more polymerizable functional groups and a polymerizable monomer including a perfluoropolyether (PFPE) unit and having two or more polymerizable functional groups, and the liquid electrolyte includes a lithium salt, an organic solvent, and acetonitrile.