9724 results about "Siloxane" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The invention relates to the technical field of folding screen supporting films, and particularly discloses a double-layer buffering supporting film for a flexible folding display screen and a preparation method of the double-layer buffering supporting film. The double-layer buffer supporting film for the flexible folding display screen sequentially comprises a release film layer, a first adhesive layer, a first stainless steel layer, a second adhesive layer, a second stainless steel layer and a protective film layer from top to bottom, the first adhesive layer and the second adhesive layer are prepared by curing the same pressure-sensitive adhesive composition; the pressure-sensitive adhesive composition is prepared from the following raw materials: acrylate copolymer, hydrogenated rosin glyceride, hyperbranched polyesteramide-dopamine conjugate, acylhydrazone bond modified siloxane, a curing agent and a silane coupling agent; the protective film layer comprises the following raw materials: PET particles, nano silicon dioxide, an ethylene-vinyl acetate copolymer and an antioxidant. The double-layer buffer supporting film has the advantages of being high in supporting rigidity and interlayer peel strength, and serious folds caused by long-term repeated folding of the folding screen can be relieved.

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

The invention relates to a photo-thermal super-hydrophobic multifunctional anti-icing coating as well as a preparation method and application thereof. The photo-thermal super-hydrophobic multifunctional anti-icing coating comprises primer and finish paint, the primer comprises the following raw materials in parts by weight: 20-25 parts of bisphenol A type epoxy resin and / or fluorine modified epoxy resin, 10-20 parts of fluorine modified polyacrylic resin and / or polyurethane resin, 5-10 parts of a curing agent and 40-55 parts of a solvent; the finish paint comprises the following components in parts by weight: 2-5 parts of polytetrafluoroethylene, 1-3 parts of soluble polytetrafluoroethylene, 1-5 parts of polydimethylsiloxane and 85-90 parts of fluorinated MOF dispersion liquid. Compared with the prior art, the photo-thermal super-hydrophobic multifunctional anti-icing coating provided by the invention has the characteristics of super-hydrophobicity, rapid ice melting, wear resistance, reduction of ice adhesion strength and reduction of icing amount, can effectively solve the problem of icing of an aluminum conductor of a power transmission line of a power system, and can be applied to power equipment such as the aluminum conductor of the power transmission line.

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to the technical field of metal surface protection, and discloses a corrosion-resistant self-repairing metal fastener and a preparation method thereof.The corrosion-resistant self-repairing metal fastener comprises a zinc alloy matrix, a nanometer passivation layer, a slow-release corrosion-resistant layer and a self-repairing functional layer, and the nanometer passivation layer, the slow-release corrosion-resistant layer and the self-repairing functional layer sequentially wrap the zinc alloy matrix; the zinc alloy matrix consists of Al, Cu, Mg, Ce and Zn; the nano passivation layer adopts zinc phosphate / silane composite sol to construct a Si-O-P covalent bond network, and plasma is combined to graft epoxy groups to enhance the interface bonding strength; the slow-release anti-corrosion layer is used for loading a pH response type benzotriazole derivative through gradient aperture mesoporous silica, so that the dynamic controlled release of a corrosion inhibitor is realized; the self-repairing functional layer adopts a synergistic effect of a mechanical triggering type sulfydryl siloxane microcapsule and a pH triggering type EDTA chelating agent microcapsule to form a physical plugging-chemical passivation dual-mode repairing mechanism. Through four-stage cooperation of matrix modification, interface strengthening, slow-release regulation and control and intelligent repair, the corrosion resistance of the corrosion-resistant self-repairing metal fastener in a complex environment is remarkably enhanced.

The invention relates to a waterborne polyurethane sizing agent, a preparation method thereof and a carbon fiber, and belongs to the technical field of carbon fiber preparation. The preparation method of the waterborne polyurethane sizing agent comprises the following steps: S10, dispersing and mixing amino modified polydimethylsiloxane and graphene oxide in an organic solvent, carrying out grafting reaction, and carrying out vacuum drying to obtain amino modified polydimethylsiloxane grafted graphene oxide; s20, mixing polyether glycol, diisocyanate and a hydrophilic chain extender, and carrying out a first reaction to obtain a first reaction solution; mixing the first reaction liquid, a small molecule chain extender and amino modified polydimethylsiloxane grafted graphene oxide for second reaction to obtain a polymerization system; and carrying out a neutralization reaction on the polymerization system and a neutralizer, and dispersing in water to obtain the waterborne polyurethane sizing agent. The waterborne polyurethane sizing agent can effectively increase the surface roughness of carbon fibers and improve the interfacial shear strength between the carbon fibers and a resin matrix.

The invention relates to the technical field of silica gel cables, and discloses a silica gel cable with high reliability and high flexibility and a process thereof, and the silica gel cable comprises a conductor layer which is formed by hierarchically twisting a plurality of tinned copper wires with the diameter of 0.05-0.10 mm, and the twisting helical angle gradually changes from 25 degrees in the inner layer to 55 degrees in the outer layer; the insulating layer coats the conductor layer and comprises a silica gel material, a hydrogen-containing silicone oil cross-linking agent and a plasticizer, microcapsules with the particle size of 20-50 microns are dispersed in the silica gel material, a shell layer of each microcapsule is polyurethane, and a core layer of each microcapsule is a siloxane repairing agent containing a platinum catalyst; and a sheath layer. A hydrogen-containing silicone oil cross-linking agent in the insulating layer enables molecular chains to be cross-linked to form a net structure, the physical and chemical stability is enhanced, microcapsules are matched to endow a self-repairing function, a repairing agent is released when the cable is damaged, the self-repairing performance of the insulating layer is further guaranteed, damage is filled through a cross-linking reaction, insulation is recovered, the reliability of the cable is remarkably improved, and the service life of the cable is remarkably prolonged.

The invention relates to the field of adhesives, and particularly discloses an OCA optical adhesive for a folding screen and a preparation method of the OCA optical adhesive. The OCA optical adhesive for the folding screen is prepared from the following raw materials in parts by weight: 60 to 80 parts of urethane acrylate, 15 to 25 parts of organic silicon grafted glycidyl ether, 20 to 30 parts of a diluent, 5 to 10 parts of a photoinitiator and 1 to 2 parts of an antioxidant, the organic silicon grafted glycidyl ether is prepared by reacting vinyl siloxane, pentaerythritol triallyl ether, allyl glycidyl ether and a catalyst. The OCA optical cement for the folding screen prepared by the invention is applied to the folding screen, and can keep relatively good elasticity, bending resistance and bonding strength in the long-term repeated folding use process, and wrinkles and bubbles are not easy to appear.

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention discloses a high-cold-resistance environment-friendly PVC decorative material and application thereof, belongs to the technical field of PVC preparation, and is used for solving the technical problem that the low temperature resistance and the environmental protection property of a PVC material in the prior art need to be further improved. The high-cold-resistance environment-friendly PVC decorative material specifically comprises the following raw materials in parts by weight: 80-100 parts of composite PVC, 8-10 parts of a bio-based plasticizer and 6-10 parts of an auxiliary additive; the preparation method comprises the following steps: modifying montmorillonite by using a silane coupling agent, loading magnesium hydroxide to prepare a composite filler, carrying out ring-opening polymerization, amine end capping and oxidation on cyclotrisiloxane to generate a low-temperature-resistant agent containing an epoxy group, introducing trimethoxysilane into PVC through sulfydryl substitution, carrying out hydrolytic condensation to form a Si-O-Si cross-linked network, and covalently binding the Si-O-Si cross-linked network with the filler and the low-temperature-resistant agent to obtain the low-temperature-resistant PVC composite material. And reacting the epoxidized soybean oil with glycine, and carrying out calcium coordination to generate a bio-based plasticizer, thereby finally preparing the PVC decorative material.

The invention relates to the technical field of polyurethane films, in particular to a long-acting, stable, flexible, impact-resistant and resistance-reducing protective film and a preparation process thereof. According to the invention, the raw materials such as polyethylene glycol, a modified fluorosilicone monomer, isophorone diisocyanate, hydroxyethyl acrylate, an acrylic antifouling monomer, dodecafluoroheptyl methacrylate and the like are added to prepare the anti-drag coating. Mixing a polyurethane thermoplastic elastomer, aminopropyl polydimethylsiloxane, an antioxidant and an ultraviolet light absorber, and carrying out melt extrusion and blow molding to form a film, so as to obtain a flexible impact-resistant base film; and uniformly coating the surface of the flexible anti-impact base film with the anti-drag coating, and carrying out ultraviolet curing to obtain a finished product. The finished product prepared by the invention has good impact resistance, and can effectively reduce frictional resistance, so that the finished product has wide application prospects in the technical field of polyurethane films.

The invention relates to the field of quantum dot ink, and discloses diffusion plate printing quantum dot ink and a preparation method thereof.The diffusion plate printing quantum dot ink comprises acrylic resin, hyperbranched polyester resin, a quantum dot material, modified boron nitride, a reactive diluent, a photoinitiator, a wetting agent and a defoaming agent; the hyperbranched polyester resin is prepared by reacting hyperbranched polyester acrylate and a sulfydryl-terminated silicon-containing reaction monomer, wherein the hyperbranched polyester acrylate is prepared by reacting pentaerythritol with 2, 2-dimethylolpropionic acid and then carrying out esterification reaction with acrylic acid; the sulfydryl-terminated silicon-containing reaction monomer is prepared by reacting eugenol with 1, 1, 3, 3-tetramethyldisiloxane and then carrying out esterification reaction with 3-mercaptopropionic acid; the modified boron nitride is prepared by modifying a cationic polymer which is prepared by carrying out a Mannich reaction on triethylene tetramine, formaldehyde and acetone and then carrying out a condensation polymerization reaction with formaldehyde. After the ink prepared by the invention is cured, a coating film is high in hardness, adhesive force and heat conductivity coefficient, and good in flexibility, heat resistance and migration barrier property.

The invention discloses a transparent composition photoresist with low shrinkage and low vacuum deflation. Comprising the following raw materials in percentage by mass: 1-5% of modified polyhedral oligomeric silsesquioxane (POSS), 1-5% of an expanding monomer, 1-5% of modified acrylic resin, 1-5% of epoxy resin, 1-5% of a thiol cross-linking agent, 1-5% of an initiator, 0.1-3% of a curing accelerator, 0.2-0.5% of a flatting agent, 0.1-5% of a silane coupling agent, 0.01-0.2% of an antioxidant and 80-90% of an electronic-grade organic solvent. The invention also provides a preparation method of a cured coating prepared from the transparent composition photoresist with low shrinkage and low vacuum deflation. The product provided by the invention not only can maintain the properties of high hardness, high thermal stability, high planarization ability, high barrier property, low hygroscopicity, low dielectric constant and the like of the transparent composition photoresist coating, but also can enable the transparent composition photoresist coating to have excellent low shrinkage and low outgassing, thereby achieving the purposes of saving energy, reducing emission, reducing cost and improving efficiency; the low shrinkage of the transparent composition photoresist coating also widens the development of the material in the fields of other panel production processes such as OLED (Organic Light Emitting Diode) and the like.

Disclosed in the present invention are a fluorosilicone-modified low-surface-energy antifouling coating and a preparation method therefor. The coating comprises the following components in parts by weight: 11-15 parts of butyl acrylate, 3-4 parts of dodecafluoroheptyl methacrylate, 3-4 parts of vinyl-terminated polydimethylsiloxane, 3-4 parts of 2-hydroxy-4-acryloyloxybenzophenone, 30-38 parts of methyl isobutyl ketone, 0.15-0.25 parts of azobisisobutyronitrile, 0.1-0.2 parts of sodium hydroxide, 2-3 parts of modified titanium dioxide nanoparticles, and 0.5-1.5 parts of 3-aminopropyltriethoxysilane. In the present invention, vinylpentamethyldisiloxane reacts with decamethylcyclopentasiloxane to prepare vinyl-terminated polydimethylsiloxane; a titanium dioxide precursor is mixed with polydopamine nanoparticles for modification to prepare modified titanium dioxide nanoparticles; and then the components above are mixed to prepare the fluorosilicone-modified low-surface-energy antifouling coating. The coating has low surface energy and good adhesion and ultraviolet resistance.

The invention relates to the technical field of polyurethane coatings, in particular to a hydrophobic flame-retardant polyurethane coating and a preparation method thereof. The preparation method comprises the following steps: firstly, taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and methallyl alcohol as raw materials, and reacting to obtain hydroxyl grafted phosphaphenanthrene; taking 1, 1, 3, 3-tetramethyldisiloxane and methallyl alcohol as raw materials, and reacting according to a molar ratio of 1: 2 to obtain dihydroxy siloxane; then cyanuric chloride, hydroxyl grafted phosphaphenanthrene and dihydroxyl siloxane react according to the molar ratio of 1: 1: (1.5-1.8), and the dihydroxyl-terminated silicon-containing flame retardant is obtained. The preparation method comprises the following steps: mixing a dihydroxyl-terminated silicon-containing flame retardant with polytetrahydrofuran ether glycol to serve as a soft segment, and reacting with isocyanate to obtain a hydrophobic flame-retardant polyurethane emulsion; mixing the hydrophobic flame-retardant polyurethane emulsion, an anti-aging agent, an ultraviolet light absorber, a defoaming agent, kaolin, nano silicon dioxide and talcum powder to obtain the hydrophobic flame-retardant polyurethane coating.

The invention relates to the technical field of thermal management material preparation, solves the technical problems of loose heat conduction network structure and non-uniform heat conduction direction of a flexible composite phase change material, and particularly relates to a magnetic polymer-based flexible composite phase change material and a preparation method thereof. Comprising the following steps: preparing a modified polydimethylsiloxane prepolymer from a carbon nanotube dispersion liquid and a polydimethylsiloxane prepolymer; adopting a Pickering emulsion method to mix 42 # paraffin, the modified polydimethylsiloxane prepolymer and nano cellulose to prepare a composite phase change material emulsion; silver mirror reaction is adopted to carry out surface silver plating on the magnetic neodymium iron boron particles; the magnetic polymer-based flexible composite phase change material is prepared from the composite phase change material emulsion and the surface-silvered magnetic neodymium iron boron particles. The high flexibility and magnetism of the prepared material in a normal temperature state endow the material with a more convenient installation mode and lower contact thermal resistance, the heat conduction network structure and component compatibility of the material are improved, and the application requirements of a phase change thermal management technology can be met.

The preparation method comprises the following steps: firstly, uniformly stirring and mixing synthetic fluorophlogopite, silica, polymethylsilsesquioxane, boron nitride, bismuth oxychloride, zinc stearate, aluminum starch octenylsuccinate, mica, aluminum oxide, hydrolyzed sodium hyaluronate and toner in a stirring homogenizer; then uniformly mixing polydimethylsiloxane, octyldodecanol stearoyloxy stearate, isoamyl laurate, diisostearyl malate, phenoxyethanol and caprylyl glycol, and heating to 45 + / -5 DEG C; pouring the mixture into an oil spraying barrel of a stirring homogenizer, uniformly stirring and mixing while spraying oil, crushing, then carrying out airflow crushing, sieving the material, putting the sieved material into a mold plate, and carrying out compression molding, so as to obtain a pressed powder block; and putting the mixture into a packing material powder box to obtain the make-up fixing and brightening pressed powder. The pressed powder is prepared by adding an airflow crushing process, the particle size of the powder is smaller, the powder is dispersed more uniformly, the powder is pressed into the solid pressed powder, and the phenomenon of powder flying is well reduced while makeup fixing and brightening effects are achieved.

The invention relates to the technical field of flexible pressure sensors, in particular to a preparation method and application of a capacitance flexible pressure sensor with an adjustable gradient random micro-cone structure, and the sensor comprises an upper electrode and a lower electrode which are transparent indium tin oxide conductive films (PET / ITO); the packaging layer is a polyimide (PI) adhesive tape and covers the outer side of the electrode; the flexible isolation layer is polydimethylsiloxane (PDMS) with a hollow structure, and is positioned between the upper electrode and the lower electrode; the dielectric layer of a gradient random micro-cone structure is located in the flexible isolation layer and is formed by compounding polyvinyl alcohol (PVA) and phosphoric acid (H3PO4) according to the mass ratio of 1: 1; the gradient micro-cone structure and the ionization effect are combined, the electric double layer effect grading phenomenon occurs, and the gradient micro-cone sensor has the advantages of being high in sensitivity, wide in detection range, capable of keeping linearity under large pressure, short in response time and good in cycling stability.

The invention discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

The invention relates to a preparation method of a high-antibacterial hydrophobic polyamide fiber. The preparation method comprises the following steps: carrying out melt extrusion grafting on polyamide, a quaternary ammonium salt monomer, an initiator and an auxiliary agent to prepare quaternary ammonium salt grafted polyamide; and carrying out melt blending on the prepared quaternary ammonium salt grafted polyamide, polyamide, cuprous oxide and polydimethylsiloxane to obtain the high-antibacterial hydrophobic nylon composite material. And spinning the high-antibacterial hydrophobic nylon composite material to obtain the high-antibacterial hydrophobic polyamide fiber. The high-antibacterial hydrophobic nylon composite material prepared by the method disclosed by the invention can realize efficient antibacterial performance, and the high antibacterial hydrophobic performance of the prepared polyamide fiber is improved.

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.

The invention relates to the technical field of polyurethane foam, and discloses fireproof flame-retardant foaming polyurethane and a preparation method thereof.The foaming polyurethane comprises a component A and a component B. The component A comprises, by weight, 100 parts of polyether polyol, 25-50 parts of a flame-retardant chain extender and the like; and the component B is 62-86 parts by weight of an isocyanate compound. The flame-retardant chain extender contains a plurality of polymerization sites, so that the crosslinking density of a polyurethane molecular chain is improved, a stable crosslinking network is formed, and meanwhile, the flame-retardant chain extender contains a siloxane structural unit with structural stability, so that the foamed polyurethane has higher compression strength. The flame-retardant chain extender contains a phosphate flame-retardant group, and forms a phosphorus-silicon flame-retardant system with a siloxane structure, so that the combustion heat release rate peak value, the total heat release amount and the total smoke release amount of foam are reduced, and the flame-retardant chain extender has good fireproof and flame-retardant properties.

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The invention discloses a flexible PI heat-conducting insulating film pad and a preparation method thereof, and relates to the field of film pads. The preparation method comprises the following steps: preparing Fe3O4 magnetic heat-conducting core and SiO2 insulating shell composite nanoparticles by a sol-gel method, treating and grafting epoxy groups by a silane coupling agent, performing ring-opening addition with one end amino group of amino-terminated polydimethylsiloxane, and reacting the other end amino group with polyethylene glycol diglycidyl ether, so that two flexible long chains are grafted on SiO2. Due to the modified composite nanoparticles and the flexible long-chain structure, the flexibility of the film pad is remarkably improved; thermal vibration of silicon-oxygen bonds and ether bonds promotes heat transfer, a hydrogen bond network is formed with a PI substrate to improve dispersion stability, particles are orderly arranged under the action of a high-frequency magnetic field to construct a three-dimensional heat conduction network, and heat conduction efficiency is enhanced; the SiO2 isolates the inner core from conducting and improves the insulating property of the film pad by virtue of good insulativity and no free charge in the flexible long-chain polymer. The flexible PI heat-conducting insulating film pad prepared by the invention has the effects of flexibility, heat conduction and insulation.

The invention discloses a modified organic silicon resin, a high-temperature-resistant coating and a preparation method thereof, the modified organic silicon resin is prepared by hydrolyzing at least two different siloxane monomers and then carrying out condensation reaction on the hydrolyzed siloxane monomers and at least one boric acid monomer, and the main chain of the organic silicon resin is of a heteroatom doped structure formed by a Si-O bond, a B-O bond and a B-O-Si bond; at 200-250 DEG C, the modified organic-inorganic high-temperature-resistant composite material is subjected to a self-crosslinking reaction. The high-temperature-resistant coating overcomes the defect that the high-temperature-resistant coating in the prior art cannot meet the high-temperature test, and avoids the defects that organic and inorganic high-temperature-resistant coatings crack, the impact resistance and hardness are not matched, the water resistance is poor, and the wear resistance is poor.

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention discloses a polyether siloxane defoaming agent for water-based paint and a preparation method of the polyether siloxane defoaming agent, and relates to the technical field of defoaming agents. The polyether siloxane defoaming agent for the water-based paint comprises the following raw materials in parts by weight: 60-75 parts of polyether modified silicone oil, 5-8 parts of silicon paste, 3-5 parts of a dispersing agent, 2-4 parts of silicon dioxide, 5-10 parts of an emulsifying agent and 2-5 parts of a surfactant. The polyether siloxane defoaming agent for the water-based paint, prepared by the invention, has good defoaming and foam-inhibiting properties and stability.