640 results about "Perfluoropolyether" patented technology

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.

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 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 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 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 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.

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.

The invention discloses a perfluoropolyether-terminated polymer, an electrolyte, a battery, a preparation method and an application, and belongs to the technical field of solid-state batteries, and the structure of the perfluoropolyether-terminated polymer is shown as a formula I. Through the structure of the multi-arm polyether, the crystallinity is obviously reduced, and the ionic conductivity is effectively improved. In addition, by grafting the perfluoropolyether chain segment, the dissolving property of the lithium salt can be further improved, the ion transference number can be increased, and meanwhile, the generation of LiF is facilitated, so that a good SEI interface is provided, and the generation of dendritic crystals is inhibited. Meanwhile, the oxidation resistance and the thermal stability of the polymer can be remarkably improved.

The invention discloses a synthesis method of low-molecular-weight perfluoropolyether acyl fluoride, which comprises the following steps: hexafluoropropylene, oxygen, a catalyst and a fluorine-containing solvent are subjected to an oxidative polymerization reaction, the reaction liquid is subjected to light component removal and solvent removal to obtain the low-molecular-weight perfluoropolyether acyl fluoride, and the temperature of the oxidative polymerization reaction is 130-300 DEG C. According to the invention, hexafluoropropylene is used as a raw material and is oxidized by oxygen in a fluorine-containing solvent, so that low-component perfluoropolyether acyl fluoride is synthesized in one step. In the presence of a catalyst, formyl fluoride, trifluoroacetyl fluoride and hexafluoropropylene oxide continue to be added into an oligomer, and the oligomer is mainly perfluoropolyether acyl fluoride with a straight-chain structure. And when the reaction temperature is within the range, the smooth proceeding of the oxidative polymerization reaction can be ensured, the sharp rise of the reaction pressure caused by the overhigh reaction temperature can be avoided, and the model selection of reaction equipment is convenient.

This fluoropolyether-based curable composition contains(A) a perfluoropolyether compound having two or more alkenyl groups per molecule,(B) a fluorine-containing organo hydrogen silane compound having two or more hydrosilyl groups having a specific structure,(C) a platinum group metal-based catalyst, and(D) a specific amount of at least one filler selected from organic resin powders and carbon black powders.Such a fluoropolyether-based curable composition can provide a cured product that has endurance against fluoric acid and electrolytic solutions for lithium ion batteries, has fine mechanical properties, and has excellent releasability because of not having uncured portions resulting from low compatibility between structural ingredients.

The invention provides an organic silicon modified perfluoropolyether UV anti-fingerprint agent and a preparation method thereof. The method comprises the following steps: adding organic silicon modified perfluoropolyether into a fluorocarbon solvent, and adding an alcohol compound containing a propenyl terminal group and a catalyst for reaction to obtain a hydroxyl-containing organic silicon modified perfluoropolyether solution; the preparation method comprises the following steps: adding an acid-binding agent into a hydroxyl-containing organosilicon modified perfluoropolyether solution, and slowly dropwise adding acryloyloxy chloride for reaction to obtain a crude product; and adding an organic alcohol compound into the crude product for treatment, carrying out liquid separation and standing, taking out subnatant, and carrying out rotary evaporation to obtain the organic silicon modified perfluoropolyether UV anti-fingerprint agent. According to the method disclosed by the invention, the problem of compatibility of the perfluoropolyether-based anti-fingerprint agent and the UV coating is solved under the condition of reducing the fluorocarbon solvent through chemical synthesis. In the curing process, the perfluoropolyether-based anti-fingerprint agent part is quickly migrated to the surface of the UV coating, and in-situ curing and crosslinking are achieved.

An object is to provide a method for producing a magnetic disk that employs a fluorine-based solvent which has a low global warming potential and in which solubility of a high-polarity perfluoropolyether compound is excellent. This object is achieved by a method for producing a magnetic disk, the method including the step of applying, to a magnetic disk substrate, a lubricant solution containing a lubricant and a hydrofluoroether having a 100-year global warming potential value of less than 1000 and having a structure represented by the following Formula (A):where: Ra represents F, CF2-Re, or CF3; Rb represents O-Rd or C(-Rf)3; Rc represents H, F, or CF3; Re and Rd each independently represent a hydrocarbon group which may be partially substituted by a fluorine atom and each have a main chain in which at least one carbon atom may be replaced by an oxygen atom; and Rfs each independently represent H, F, or a hydrocarbon group that may be partially substituted by a fluorine atom, and the hydrocarbon group that may be partially substituted by the fluorine atom has a main chain in which at least one carbon atom may be replaced by an oxygen atom.

The invention discloses a titanate coupling agent modified perfluoropolyether compound, a preparation method thereof and an anti-fingerprint agent, and belongs to the field of surface treating agents. The preparation method comprises the following steps: adding a titanate coupling agent into a mixed solution of water and absolute ethyl alcohol, and hydrolyzing to obtain a hydroxylated titanate coupling agent; the hydroxylated titanate coupling agent and perfluoropolyether siloxane are subjected to a condensation reaction to obtain the perfluoropolyether siloxane modified hydroxylated titanate coupling agent. Titanium atoms are introduced into the perfluoropolyether siloxane, so that the anti-fingerprint agent is endowed with excellent bacteriostatic and bactericidal effects during application, meanwhile, the interfacial compatibility and adhesive force between the perfluoropolyether siloxane and the surface of a base material are improved, and the performance and mechanical strength of a film layer of the anti-fingerprint agent are enhanced.

The present invention provides a perfluoropolyether modified silicon dioxide material and a preparation method therefor. The preparation method comprises: adding a functionalized fluorine-containing polymer to a first solvent, adding a silane coupling agent and a catalyst and reacting, and obtaining a functionalized fluorine-containing polymer-modified siloxane; adding silicon dioxide to a second solvent and water, and then adding the functionalized fluorine-containing polymer-modified siloxane, a main catalyst, and a co-catalyst and reacting, and obtaining a crude product of a functionalized fluorine-containing polymer-modified silicon dioxide; and desolvating the crude product and drying, to then obtain a perfluoropolyether-modified silicon dioxide material. The technical solution of the present invention solves the problems of traditional silicon dioxide such as the large number of hydroxyl groups on the surface thereof, being prone to agglomeration in materials, uneven dispersion, and poor compatibility with substrates, improves the compatibility of silicon dioxide materials with substrates, and promotes dispersion. Moreover, reactive groups on the surface thereof can achieve in-situ chemical crosslinking or in-situ synthesis with other materials, thus, the range of application is broader.

The present invention provides an organosilicon-modified-perfluoropolyether-based UV anti-fingerprint agent and a preparation method therefor. The method comprises the following steps: adding an organosilicon-modified perfluoropolyether to a fluorocarbon solvent, adding an alcohol compound containing a propenyl-terminated group and a catalyst thereto, and reacting same, so as to obtain a hydroxyl-containing organosilicon-modified perfluoropolyether solution; adding an acid-binding agent to the hydroxyl-containing organosilicon-modified perfluoropolyether solution, and slowly adding, in a dropwise manner, an acryloyloxy chloride, and reacting same, so as to obtain a crude product; and adding an organic alcohol compound to the crude product for a treatment, subjecting same to liquid separation, leaving same to stand, taking out a subnatant, and subjecting same to rotary evaporation, so as to obtain an organosilicon-modified-perfluoropolyether-based UV anti-fingerprint agent. By means of chemical synthesis, the method of the present invention solves the problem of compatibility between a perfluoropolyether-based anti-fingerprint agent and a UV coating, whilst reducing the amount of fluorocarbon solvent. During the process of curing, the present invention further achieves the rapid migration of part of the perfluoropolyether-based anti-fingerprint agent to the surface of the UV coating for curing and cross-linking in situ.