60 results about "PERFLUOROOCTYL TRIETHOXYSILANE" patented technology

The invention relates to the field of optical lens coatings, and particularly discloses a preparation method of an antifouling and antibacterial spectacle lens coating. The preparation method of the antifouling and antibacterial spectacle lens coating comprises the following steps: depositing a silicon dioxide substrate on the surface of a lens through plasma enhanced chemical vapor deposition treatment; the preparation method comprises the following steps: dispersing nano-graphene and nano-silver particles in an ethanol solvent, adding a silane coupling agent to form a homogeneous suspension, loading the suspension on the surface of a silicon dioxide substrate through a spin-coating method, and carrying out heat treatment curing to form an antibacterial layer, with the loading amount of nano-silver being less than or equal to 0.5 wt%; and etching the surface of the antibacterial layer by adopting a reactive ion etching method, and then grafting perfluorooctyltriethoxysilane on the etched surface at 80-100 DEG C by adopting a vapor deposition method to form the hydrophobic layer. The preparation method of the antifouling and antibacterial spectacle lens coating has the advantages of being antibacterial, antifouling and high in durability.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention relates to the technical field of flame-retardant materials, and particularly discloses a graphene-modified flame-retardant polyurethane material and a preparation method thereof.The graphene-modified flame-retardant polyurethane material is prepared from, by weight, 60-70 parts of polyhydric alcohols, 30-40 parts of isophorone diisocyanate, 0.4-0.8 part of dibutyltin dilaurate, 3-6 parts of dimethylolpropionic acid, 15-20 parts of composite flame retardant, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2 and 1 to 3 parts of 1, 4-butanediol and 1 to 3 parts of perfluorooctyltriethoxysilane. The preparation method comprises the following steps: 1) preparing castor oil-based polyester polyol through hydroxylation reaction and polycondensation; 2) taking graphene oxide as a core, grafting phosphorus and nitrogen flame-retardant groups and carrying out silane-titanate synergistic modification to prepare a composite flame retardant; 3, polyhydric alcohol and isocyanate are pre-polymerized, then the chain extender, the composite flame retardant and the auxiliaries are sequentially added, and curing molding.The material has low smoke and excellent flame retardance, mechanical property and hydrophobic stability through the synergistic effect of graphene and a phosphorus-nitrogen flame-retardant system, and is suitable for the field of flame-retardant high polymer materials for buildings, electronic packaging and the like.

The invention belongs to the technical field of rubber sealing rings, and particularly discloses a wading rubber sealing ring and a preparation method thereof, the wading rubber sealing ring comprises the following components by weight: 60-70 parts of modified ethylene propylene diene monomer, 35-50 parts of modified white carbon black, 20-30 parts of hydrogenated nitrile rubber, 0-10 parts of fluororubber, 2-5 parts of polyester fiber, 0.5-3 parts of an anti-hydrolysis agent, and 1-3 parts of a hydrophobic agent. 2-4 parts of an antimicrobial agent, 3-5 parts of an anti-aging agent and 1-7 parts of sulfur; the anti-hydrolysis agent is a mixture of tetrakis [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and a carbodiimide anti-hydrolysis agent; the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane, and the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane. The wading rubber sealing rubber ring and the preparation method thereof are suitable for fresh water and warm water scenes, and have wide application prospects in ship sealing and sewage treatment equipment in seawater and industrial wastewater scenes.

The invention discloses a preparation method of a PVDF-Q-ZIF-67 / POTS membrane and application of the PVDF-Q-ZIF-67 / POTS membrane in treatment of radioactive waste liquid of a nuclear power plant, and the preparation method comprises the following steps: firstly, blending PVA (polyvinyl alcohol), Que (quercetin) and PVDF (polyvinylidene fluoride) for electrostatic spinning to obtain a PVDF-Q hydrophilic layer, then carrying out electrostatic spinning on the blended LiCl and PVDF to obtain a PVDF base membrane, and then carrying out electrostatic spinning on the PVDF base membrane by adopting ZIF-67, POTS (1H, 1H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H, 2H The method comprises the following steps of: coating a PVDF (Polyvinylidene Fluoride) base membrane with a ZIF-67 / POTS super-hydrophobic coating by using a PVDF-Q-ZIF-67 / POTS super-hydrophobic coating as a raw material, assembling to synthesize a PVDF-Q-ZIF-67 / POTS membrane, and finally introducing the radioactive waste liquid into a direct contact type membrane distillation device adopting the PVDF-Q-ZIF-67 / POTS membrane for treatment, so that the concentration of the radioactive waste liquid and the efficient separation of nuclides can be realized. The PVDF-Q-ZIF-67 / POTS membrane is applied to treatment of nuclear power station radioactive waste liquid, after direct contact type membrane distillation, the flux of the PVDF-Q-ZIF-67 / POTS membrane can be kept stable for a long time, the concentration multiple is high, the nuclide rejection rate is larger than or equal to 99.9%, and the PVDF-Q-ZIF-67 / POTS membrane is stable in chemical property, good in pollution resistance and good in application prospect in the fields of nuclear power stations, nuclear fuel plants and the like.

The invention belongs to the technical field of hydrophobic surface materials, and particularly relates to a method for constructing a super-hydrophobic surface based on amphipathic hollow silicon dioxide Janus nanoparticles, which comprises the following steps: constructing amphipathic Janus particles by using an adhesion polypeptide sequence of an obtained membrane as an adhesion end and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane as a hydrophobic end; a rapid and efficient surface super-hydrophobic coating is successfully constructed, and the surface is endowed with antibacterial and anti-protein adhesion effects.

The invention relates to a super-amphiphobic coating with a dual self-repairing function and a preparation method of the super-amphiphobic coating. According to the super-amphiphobic coating, crack self-repairing is achieved through dynamic disulfide bonds, and low-surface-energy substance self-repairing is achieved through microcapsules. The preparation method comprises the following steps: firstly, modifying hydroxyl-terminated polydimethylsiloxane by using an isocyanate prepolymer containing disulfide bonds, then modifying TiO2 nanoparticles by using 3-aminopropyltriethoxysilane and octadecyltrimethoxysilane, and preparing a microcapsule which takes polyamide as a shell and perfluorooctyltriethoxysilane as a core material, and finally, carrying out ball-milling mixing on the disulfide bond-containing polyurethane modified organic silicon resin, the modified TiO nanoparticles, microcapsules and 2-hydroxy-2-methyl propiophenone, and spraying the mixture on the surface of a base material to obtain the super-amphiphobic coating with the dual self-repairing function. According to the super-amphiphobic coating with the dual self-repairing function and the preparation technology thereof, the coating achieves high durability through dual self-repairing, and the hydrophobic and oleophobic performance is high.

The invention relates to the field of building adhesive materials, and provides a powerful firm two-component anti-seepage waterproof building adhesive which comprises a component A and a component B, the component A is prepared from epoxy resin E-51, a reactive diluent BGE, a flexibilizer CTBN, a dispersing agent and a defoaming agent; the component B is composed of perfluoroalkyl silane modified boron nitride, dicyandiamide, an imidazole curing agent, fumed silica HL-200, a fluorine-containing silane coupling agent modified titanium dioxide nanowire and the like, and the component A and the component B are mixed according to the mass ratio of (2.0-4.0): 1. The perfluoroalkyl silane modified boron nitride is prepared through surface polymerization of dopamine hydrochloride and grafting modification of perfluorooctyltrimethoxysilane, and the fluorine-containing silane coupling agent modified titanium dioxide nanowire is obtained through surface treatment of perfluorooctyltriethoxysilane. After the colloid is cured, a high-strength waterproof layer is formed, the waterproof performance, the impermeability and the ultraviolet aging resistance are excellent, and the waterproof colloid is suitable for building waterproof engineering.

The invention belongs to the technical field of polyester polyol, and particularly relates to waterproof polyester polyol containing a silicon-fluorine long-chain cross-linking body as well as a preparation method and application of the waterproof polyester polyol. Comprising the following steps: (1) mixing adipic acid and pentaerythritol for esterification reaction to obtain basic polyester polyol; hydroxyl-terminated fluorine-containing polysiloxane is added into the basic polyester polyol for continuous reaction, and modified polyester polyol is prepared; (2) dispersing nano silicon dioxide in an alcohol solvent, then dispersing 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane in deionized water, and carrying out a mixed reaction so as to prepare modified nano silicon dioxide; and (3) adding the modified nano silicon dioxide into the modified polyester polyol, and reacting to obtain the waterproof polyester polyol containing the silicon-fluorine long-chain crosslinking body. The waterproof performance of the material is enhanced by introducing a silicon-fluorine long chain into a polyester polyol structure, and the roughness of the surface of the material is improved by introducing nano silicon dioxide, so that the hydrophobicity is further improved.

The invention relates to a low-expansion moisture-resistant electronic component packaging resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The resin adhesive comprises the following components: modified resin, phenyl methyl organic silicon resin, epoxy vinyl resin, a dynamic functional curing agent, a microencapsulated dicyandiamide curing agent, perfluorooctyltriethoxysilane, functional filler and the like; the modified resin is obtained by modifying hydrogenated bisphenol A epoxy resin with hydrogen-terminated polydimethylsiloxane and trimethylsiloxy silicate ester, adding a silane coupling agent and mixing; the dynamic function curing agent is obtained by reacting hexamethylenediamine and intermediate powder obtained by reacting 2, 3-dihydroxy benzaldehyde with pinacol borane; the functional filler comprises silicon dioxide and boron nitride which are subjected to surface treatment by a silane coupling agent. The low-expansion and high-moisture-resistance electronic component packaging resin adhesive is prepared from the components according to a specific ratio and a specific method, the components have a synergistic effect and play advantages, and the packaging reliability and the service life of an electronic component are guaranteed.

The invention relates to the technical field of sound insulation cotton, in particular to flame-retardant sound insulation cotton for household appliances and a production method. Comprising a fiber layer and a waterproof layer arranged on the fiber layer, the fiber layer is prepared from the following components in parts by weight: 30 to 40 parts of modified polyurethane fiber, 40 to 50 parts of glass fiber, 8 to 10 parts of adhesive, 5 to 10 parts of stearyl alcohol, 3 to 5 parts of 3-aminopropyltriethoxysilane and 15 to 20 parts of water; the waterproof layer is prepared from the following components: 20 to 30 parts of acrylate, 5 to 10 parts of petroleum resin, 1 to 5 parts of perfluorooctyltriethoxysilane, 6 to 10 parts of polyethylene glycol, 3 to 5 parts of nano graphene and 30 to 40 parts of water. According to the flame-retardant sound-insulation cotton, the porous fiber layer is prepared by mixing the modified polyurethane fibers and the glass fibers, so that sound diffusion is hindered, and the modified polyurethane fibers have good flame retardance, so that spontaneous combustion of the flame-retardant sound-insulation cotton due to high temperature can be effectively avoided.

The invention discloses a modification device and method applied to a nano silicon dioxide antifouling coating agent. The modification device comprises a plasma activation module, an ion beam auxiliary deposition module, an ultrasonic cavitation module, a vacuum adsorption module and a low-temperature curing unit. The modification method comprises the following steps: S1, plasma pretreatment: bombarding the surface of nano silicon dioxide by adopting an Ar < + > beam in a mixed atmosphere; s2, in-situ synergistic grafting modification: mixing a silane coupling agent KH-570, perfluorooctyltriethoxysilane and an ionic liquid modifier, carrying out ultrasonic dispersion for 30 minutes, and then carrying out vacuum adsorption and oriented film forming; s3, ion beam assisted deposition of a conductive layer: alternately depositing an ITO conductive layer and a fluorocarbon shell layer in the vacuum cavity; and S4, low-temperature curing: adopting an O-beam to trigger fluorocarbon bond rearrangement, performing UV-LED irradiation and far infrared heating to 75 DEG C, and enabling the crosslinking density to be greater than or equal to 85%, so that the prepared nano silicon dioxide antifouling coating agent has excellent antistatic property, anti-reflection property and wear resistance, and is relatively high in adhesive force.

The invention discloses a preparation method of a three-dimensional moisture transport fabric, specifically comprising the following steps: (1) first 1H, 1H, 2H, 2H-perfluorooctyl triethoxysilane is dissolved in ethanol, stirred, and then TiO2 nanoparticles are added, mixed, and a suspension is obtained; (2) cotton fabric is added to the suspension and soaked, taken out and cleaned, and aired to obtain a super-hydrophobic cotton fabric; (3) the outside of the super-hydrophobic cotton fabric is subjected to ultraviolet irradiation, and a wetting gradient is constructed in the outside length direction; (4) the inside of the super-hydrophobic cotton fabric is subjected to ultraviolet irradiation, and a wetting gradient is constructed in thickness direction. The present invention transports and manages moisture outside the fabric, which will be conducive to improving the comfort of the inside of the fabric, and avoids the fabric moisture management ability decline caused by water saturation outside the fabric.

The present invention discloses a hot-pressing magnetic powder connecting adhesive and a preparation method thereof, belonging to the technical field of connecting adhesives, and comprising the following components in percentage by weight: 45-65% fluorine-containing modified epoxy resin, 15-20% curing agent, 20-30% filler, 5-8% toughening agent, 0.5-1.5% auxiliary agent; the fluorine-containing modified epoxy resin is obtained by reacting bisphenol A epoxy resin with perfluorooctyltriethoxysilane, and the mass ratio of bisphenol A epoxy resin to perfluorooctyltriethoxysilane is (8-5):1. The hot-pressing magnetic powder connecting adhesive of the present invention has extremely high Tg and Td, can work stably at 280°C for a long time, is significantly superior to existing products (such as DM-6997), and meets the magnetic powder connection and insulation requirements in high-temperature scenarios such as oil drilling.

This invention relates to the field of superhydrophobic composite coating technology, and discloses a method for preparing a SiO2-based bicovalent network superhydrophobic composite coating. This method uses tetraethoxysilane to synthesize silica nanoparticles to construct surface roughness, and utilizes the long fluorocarbon chain of perfluorooctyltriethoxysilane (POTS) to modify it with low surface energy. A silane coupling agent and aluminum nitrate are introduced to generate a Si-O-Si covalent network as molecular bridges and an Al-O-Al covalent network as a framework, respectively. An epoxy resin (EP) is used as a bonding layer to adhere the coating to a substrate. The SiO2-based bicovalent network superhydrophobic composite coating prepared by this method exhibits excellent superhydrophobicity, mechanical stability, chemical stability, and thermal stability, providing a simple manufacturing strategy for the industrial application of superhydrophobic materials.

The invention relates to the technical field of civil engineering material protection, in particular to a high-fluorine-content silane emulsion as well as a preparation method and application thereof. The high-fluorine-content silane emulsion comprises the following raw materials in parts by weight: 2.5-3.0 parts of an emulsifier, 0.5-1 part of polyethylene glycol, 2-3 parts of a silicone acrylic emulsion, 12-16 parts of water and 74-81 parts of silane, 2-3 parts of nano zinc oxide; wherein the emulsifying agent is prepared from peregal O and Span80; the silane is prepared from 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane and isooctyl triethoxysilane, and the silane is prepared from the following components: 1, 1, 2, 3-perfluorooctyltriethoxysilane and isooctyl triethoxysilane. The high-fluorine-content silane emulsion provided by the invention not only has strong self-stability, but also has good adhesive force, strong permeability and excellent hydrophobic performance after being sprayed or brushed on the surface of concrete, and also has a photocatalytic self-cleaning effect.

The application discloses a modified device and method applied to nano-silica antifouling coating agents, the modified device comprises a plasma activation module, an ion beam assisted deposition module, an ultrasonic cavitation module, a vacuum adsorption module and a low-temperature curing unit; the modified method comprises the following steps of S1, plasma pretreatment: under a mixed gas atmosphere, Ar + beam is used for bombarding the surface of nano-silica; S2, in-situ synergistic grafting modification: a silane coupling agent KH-570, a perfluorooctyl triethoxysilane and an ionic liquid modifier are mixed, ultrasonic dispersion is performed for 30 min, and then vacuum adsorption is performed to direct film formation; S3, ion beam assisted deposition of a conductive layer: ITO conductive layers and fluorocarbon shell layers are alternately deposited in a vacuum cavity; S4, low-temperature curing: O ‑ beam triggers fluorocarbon bond rearrangement, UV-LED irradiation and far infrared heating to 75 DEG C, the crosslinking density is greater than or equal to 85%, and the prepared nano-silica antifouling coating agent has excellent antistatic property, transmittance and wear resistance, and higher adhesion.

The invention discloses an oleophylic and hydrophobic material for an oil collector and a preparation method, and relates to the technical field of environment-friendly equipment materials related to oil leakage treatment. The oleophylic and hydrophobic material for the oil collector is prepared from the following raw materials in parts by weight: 40 to 50 parts of modified high-density polyethylene, 15 to 20 parts of linear low-density polyethylene, 8 to 12 parts of petroleum resin C5, 5 to 8 parts of modified nano silicon dioxide, 2.0 to 3.5 parts of perfluorooctyltriethoxysilane, 1 to 3 parts of silane coupling agent KH-550, 0.2 to 0.4 part of antioxidant 1010 and 4 to 6 parts of ethylene-vinyl acetate copolymer. According to the oleophylic and hydrophobic material for the oil collector and the preparation method, the advantages are remarkable, the raw material ratio is scientific, the material contains modified high-density polyethylene, modified nano silicon dioxide and the like, and the oleophylic and hydrophobic properties are improved through multi-step modification; the preparation process is standard, parameters of all links are clear, and stable material performance is guaranteed; and the performance is optimized through annealing and plasma treatment, the requirements of the oil collecting machine can be efficiently met, and practicability is high.

The invention discloses hot-pressing magnetic powder connecting glue and a preparation method thereof, and belongs to the technical field of connecting glue, the hot-pressing magnetic powder connecting glue comprises the following components by weight: 45-65% of fluorine-containing modified epoxy resin, 15-20% of a curing agent, 20-30% of a filler, 5-8% of a flexibilizer, and 0.5-1.5% of an auxiliary agent; the fluorine-containing modified epoxy resin is obtained through a reaction of bisphenol A type epoxy resin and perfluorooctyltriethoxysilane, and the mass ratio of the bisphenol A type epoxy resin to the perfluorooctyltriethoxysilane is (8-5): 1. The hot-pressing magnetic powder connecting adhesive has extremely high Tg and Td, can stably work at 280 DEG C for a long time, is obviously superior to existing products (such as DM-6997), and meets the requirements of magnetic powder connection and insulation in high-temperature scenes such as oil drilling and the like.

The application discloses a kind of corrosion-resistant PTFE sealing ring and its production process, the raw material includes polytetrafluoroethylene, modified polytetrafluoroethylene and modified filling material;The production process includes: the modification of filling material, the modification of polytetrafluoroethylene and the preparation of sealing ring;First, the application utilizes perfluorooctyl triethoxysilane and gamma-glycidyl ether oxygen propyl trimethoxysilane modified nano h-boron nitride and silicon carbide powder, prepares filling material, under the effect of not affecting the nature of polytetrafluoroethylene itself, realize the significant improvement of wear resistance, thermal conductivity and anti creep performance of sealing ring;The application introduces ether chain by copolymerizing silane modified polytetrafluoroethylene and perfluoropropyl vinyl ether under ammonium persulfate initiation, finally introduces amino group by gamma-aminopropyl triethoxysilane, realizes the close combination with filling material, binder, to improve the connectivity with material, enhance sealing capacity.

The invention discloses a coating process method for high-refractive-index and wear-resistant glass beads, which specifically comprises the following steps: S1, cleaning and removing impurities from the glass beads, and performing surface activity catalytic treatment on the glass beads; s2, the glass beads are soaked in a coating solution for dynamic coating; and S3, spraying a perfluorooctyltriethoxysilane and hydroxy acrylic resin composite coating on the glass beads, naturally drying, soaking in an ethanol solution of 1wt% gamma-aminopropyltriethoxysilane for 10-15 minutes, carrying out post-treatment, and carrying out microwave curing treatment to obtain the high-refraction wear-resistant glass beads. The invention relates to the technical field of glass beads. According to the coating process method for the high-refractive-index and wear-resistant glass beads, waste glass is used as a raw material, the production cost is reduced, the glass beads are activated, the coating bonding strength of the glass beads is improved, titanium dioxide is plated on the surfaces of the glass beads in situ, the refractive index is improved, and meanwhile, good wear resistance is achieved.

The invention discloses a catalyst for preparing citronellal by selective reduction of citral and a preparation method thereof. A magnesium oxide carrier is obtained by calcining a magnesium salt at high temperature, a palladium precursor is uniformly loaded on magnesium oxide by adsorption, palladium is reduced with sodium borohydride, potassium borohydride or sodium formate, and then a hydrophobic hydrogenation catalyst is obtained by modification with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane. The catalyst prepared in this way has high catalytic activity and selectivity for the reaction of preparing citronellal by selective reduction of citral. The catalyst active components of the present invention are highly dispersed, highly active, and have a selectivity of ≥98%, and the catalyst cost is low, and has a high industrial application value.

This invention discloses a MIL-68(In) / POTS@PTFE hydrophobic membrane and its preparation method, belonging to the field of polytetrafluoroethylene membrane processing and manufacturing technology. The invention first prepares a metal-organic framework material MIL-68(In), then modifies MIL-68(In) using 1H, 1H, 2H, 2H perfluorooctyltriethoxysilane (POTS), and finally deposits the modified MIL-68(In) solution onto the surface of a polytetrafluoroethylene (PTFE) membrane using a spray coating method to obtain the MIL-68(In) / POTS@PTFE hydrophobic membrane. Membrane; This invention utilizes MIL-68(In) to enhance compatibility with PTFE membranes. Simultaneously, after hydrolysis of one end of POTS, the siloxane group Si-O-CH2CH3, which is completely replaced by silanol group Si-OH, is chemically bonded to the surface of MIL-68(In). The Si-OH between the hydrophobic long chains undergoes a dehydration reaction to form a polysiloxane network structure. The fluorine atom groups contained in POTS effectively reduce the free energy of the MIL-68(In) surface, thus realizing the preparation of MIL-68(In) / POTS@PTFE membrane with further improved hydrophobicity.

The application belongs to the field of power cables, and discloses a kind of weather-proof overhead cables of insulation shielding integration, from inside to outside, including aluminum alloy conductor, conductor-insulation interface layer, insulation shielding integration layer and weather-proof protective layer in proper order;The purpose of the application is to provide a kind of weather-proof overhead cables of insulation shielding integration and preparation method thereof, adopt EMA and LLDPE thermodynamics incompatible to form two-phase co-continuous structure, conductive carbon black selective distribution realizes the scheme of integration of shielding and insulation, zinc stannate / nano yttrium oxide composite filler and nano barium titanate are introduced to form deep-shallow trap gradient cooperation to inhibit space charge, adopt perfluoro octyl triethoxysilane modified synthesis fluorine mica and KH-560 modified boehmite nanosheet to construct laminated water-blocking interface layer, adopt PVDF-HFP and POE blend to add KH-550 modified nano neodymium oxide to construct fluoropolymer / polyolefin composite weather-proof protective layer.

The invention discloses a salvinia natans bionic coating based on a reusable thermosensitive softening template and deep pinning and a preparation method of the salvinia natans bionic coating. The coating is prepared from epoxy resin, ferroferric oxide nano particles, ferroferric oxide micro particles, ferroferric oxide particles modified by 3-aminopropyl triethoxy silane, corn starch, polyvinylpyrrolidone, octadecylamine, perfluorooctyltriethoxy silane and deionized water, and the ferroferric oxide particles are prepared from epoxy resin, ferroferric oxide nano particles, ferroferric oxide micro particles, 3-aminopropyl triethoxy silane modified ferroferric oxide particles, corn starch, polyvinylpyrrolidone, octadecylamine, perfluorooctyltriethoxy silane and deionized water. Preparing magnetic slurry from epoxy resin, a solvent and ferroferric oxide particles, and performing staged magnetic field curing; preparing a thermosensitive template with modified ferroferric oxide as an inner core and corn starch as a shell, and embedding the micro-bulge tips under thermosensitive and magnetic field conditions; and carrying out hydrophobization treatment under the protection of the template, and finally heating and ultrasonically recovering the template. The cost is reduced through a reusable template, the wettability gradient is kept stable through deep pinning, ordered distribution of particles is achieved through layered magnetic field regulation and control, the gas film coverage rate and stability are improved, and the method is suitable for ships, ocean engineering and antifouling protection.

The present invention belongs to the technical field of anti-corrosive and anti-icing wires. Disclosed is a preparation method for a super-lubricating anti-icing aluminum wire. By using an aluminum wire as an anode, and a stainless steel plate as a cathode, the cathode and the anode are connected to a direct-current power source via wires, and are then placed in an electrolyte for anodization, so as to obtain an anodized wire; and the wire is immersed in a perfluorooctyl triethoxysilane-ethanol solution, and is then placed in an oven for curing, so as to obtain an anti-icing surface. By regulating and controlling the concentrations of chloride ions and glycerol in the present invention, the competitive reaction of chloride ions is reduced, such that aluminum ions can participate in an oxidation reaction more easily; in addition, the hardness and wear resistance of an oxidation film layer are improved, which facilitates forming a uniform oxidation film layer having a large pore diameter on the aluminum wire, thereby increasing the smoothness, reducing the roughness, improving the hydrophilicity, and reducing the surface energy, thus reducing the ice adhesion strength of the surface of the wire.

The invention relates to the technical field of super-hydrophobic composite coatings, and discloses a preparation method of a SiO2-based double-covalent network super-hydrophobic composite coating. According to the method, tetraethoxysilane is used for synthesizing silicon dioxide nanoparticles to construct the surface roughness, and a fluorocarbon long chain of perfluorooctyltriethoxysilane (POTS) is used for carrying out low surface energy modification on the silicon dioxide nanoparticles. A silane coupling agent and aluminum nitrate are introduced to respectively generate a Si-O-Si covalent network serving as a molecular bridge and an Al-O-Al covalent network serving as a framework. Epoxy resin (EP) is adopted as a bonding layer, and the coating is adhered to a substrate. The SiO2-based double-covalent network super-hydrophobic composite coating prepared by the method has excellent super-hydrophobicity, mechanical stability, chemical stability and thermal stability, and a simple and convenient manufacturing strategy is provided for industrial application of a super-hydrophobic material.

The invention discloses a corrosion-resistant PTFE (Polytetrafluoroethylene) sealing ring and a production process thereof. The corrosion-resistant PTFE sealing ring is prepared from the following raw materials: polytetrafluoroethylene, modified polytetrafluoroethylene and a modified filling material, the production process comprises the steps of modification of a filling material, modification of polytetrafluoroethylene and preparation of the sealing ring. According to the invention, firstly, nano h-boron nitride and silicon carbide powder are modified by using perfluorooctyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane to prepare a filling material, so that the wear resistance, thermal conductivity and creep resistance of the sealing ring are remarkably improved under the action of not influencing the properties of polytetrafluoroethylene; according to the invention, silane modified polytetrafluoroethylene and perfluoropropyl vinyl ether are subjected to copolymerization under the initiation of ammonium persulfate, an ether chain is introduced, and finally amino is introduced through gamma-aminopropyltriethoxysilane, so that tight combination with a filling material and a binder is realized, the connectivity with a matching material is improved, and the sealing capability is enhanced.

The application provides a bidirectional piston sealing ring and a preparation method thereof, and belongs to the technical field of sealing ring preparation, and comprises the following steps: step S1, preparing a pre-reaction solution; step S2, adding pretreated polytetrafluoroethylene, triethylamine, 3-aminopropyl triethoxysilane solution and perfluorooctyl triethoxysilane into the pre-reaction solution, performing ultrasonic treatment, vacuum degassing, performing a thermal imine reaction, filtering, washing, and drying to obtain modified polytetrafluoroethylene; step S3, uniformly mixing the modified polytetrafluoroethylene powder and polytetrafluoroethylene powder, vacuum drying, performing hot-pressing forming, performing pressure relief demolding, then annealing, and then cooling to room temperature to obtain the bidirectional piston sealing ring. The bidirectional piston sealing ring has the advantages of high wear resistance and good anti-creep capacity.

The present application relates to the technical field of coating compositions, and discloses a high-selectivity gas-sensitive coating composition for an electronic nose chip of a humanoid robot, which comprises 40-60 parts of a film-forming base selected from polyvinylidene fluoride or fluorovinyl-vinyl ether alternating copolymer; 15-25 parts of a gas-sensitive filler selected from metal organic framework ZIF-8; 2-5 parts of a conductive agent selected from unmodified multi-walled carbon nanotubes; 1-3 parts of a compatibility regulator selected from perfluorooctyl triethoxysilane; and a binary solvent system composed of a good solvent for dissolving the film-forming base and a non-solvent for dispersing the gas-sensitive filler but not dissolving the film-forming base. The present application utilizes the difference in volatilization rate of the good solvent and the non-solvent and the difference in surface energy between components to induce phase separation, so that the conductive agent is directionally distributed at the phase interface between the gas-sensitive filler and the film-forming base, a heterogeneous conductive network coated with a hydrophobic matrix is constructed, the mechanical strength of the coating is maintained, the exponential resistance response to trace gases is realized, and the interference of high-humidity environment is eliminated.