60 results about "Silica nanoparticles" patented technology

The invention relates to the technical field of organic silicon coatings, in particular to a preparation method of an organic silicon antifouling coating for slowly releasing a lubricant. The preparation method of the organosilicon antifouling coating of the slow-release lubricant comprises the following steps: carrying out emulsion polymerization on silicon dioxide nanoparticles, acryloyloxy alkyl alkoxy silane, fluorine-containing acrylate and lubricating oil in a redox system to obtain a fluorine-silicon modified silicon dioxide nanoparticle emulsion of which the surface is attached with the lubricating oil; and then mixing with organic silicon resin, a coupling agent, a cross-linking agent and a catalyst, and carrying out cross-linking curing to obtain the organic silicon coating. The lubricating oil is adsorbed on the surfaces of the nano particles under the action of grafted functional groups of the functionalized nano particles, so that the lubricating oil is introduced into the organic silicon coating in the form of emulsion particles, micro-nano lubricating oil droplets are formed, long-acting slow release of the lubricating oil is realized, the amphiphobic property and low surface energy of the coating are improved, and the antifouling capacity of the coating is improved; meanwhile, the mechanical property is improved.

The invention relates to the field of cable materials, and discloses a flame-retardant anti-aging cable material and a preparation method thereof.The flame-retardant anti-aging cable material is prepared from, by weight, 45-70 parts of nitrile rubber, 20-40 parts of natural rubber, 7-12 parts of modified carbon nanotubes, 5-10 parts of composite filler, 3-5 parts of nano-zinc oxide, 2-4 parts of stearic acid, 1-3 parts of sulfur and 0.1-0.5 part of accelerant; the modified carbon nano tube is prepared by modifying a flame retardant and p-phenylenediamine on the surface of a carbon nano tube through a chemical reaction; the composite filler is prepared by taking a titanium dioxide nanosheet as a carrier and growing silicon dioxide nanoparticles in situ, and the cable material is endowed with excellent mechanical properties, flame retardance and ageing resistance by adding the modified carbon nanotubes and the composite filler.

The invention discloses a surface self-cleaning polypropylene material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out melt blending on PP and fluorosilane modified silicon dioxide nanoparticles in an open mill to obtain a composite material; then the composite material is pressed on a flat plate press, the surface of the composite material is covered with a fluorine-containing base plate during pressing, in the pressing process, silicon dioxide particles are migrated to the PP surface to construct a micro-nano coarse structure, and the surface hydrophobicity of the composite material is improved through the synergistic effect of low surface energy of modified silicon dioxide. The contact angle between the hydrophobic PP surface and water in air is greater than or equal to 120 degrees, and the hydrophobic PP surface has excellent self-cleaning performance. The invention effectively solves the problems of complex process and poor effect of improving the hydrophobicity of the polypropylene material in the prior art. The preparation process is simple and convenient to operate, and the product is excellent in performance and has a self-cleaning effect.

The invention provides a powdery modified aramid nanofiber filler as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The method provided by the invention comprises the following steps: firstly, adding a water-soluble high polymer into a solvent, then adding nano aramid fiber hydrogel into the solution, and finally, respectively adding an alkoxy silane compound and a silicate compound into the solution to obtain the powdery modified aramid nano composite filler with functionalized silicon dioxide nanoparticles grafted on the surface. The modified aramid nano composite filler prepared by the invention is powdery solid filler, is easy to industrialize, and can be applied as nano composite filler of a polymer composite material. According to the prepared modified aramid nano composite filler / polymer composite material, the problem that the aramid nano fibers are difficult to disperse in the polymer is effectively solved, and more importantly, the physical and mechanical properties of the composite material are improved.

The invention provides a preparation method and application of polymer coupling grafting modified silicon dioxide, and relates to the technical field of preparation of modified silicon dioxide. The preparation method of the polymer coupling grafting modified silicon dioxide comprises the following steps: providing a silane coupling agent, and modifying the surface of nano silicon dioxide by using the silane coupling agent to obtain vinyl functionalized nano silicon dioxide; providing a polymer with a terminal hydroxyl group, and carrying out terminal sulfhydrylation treatment on the polymer with the terminal hydroxyl group to obtain a polymer with a terminal sulfydryl group; the vinyl functionalized nano silicon dioxide and the polymer with the terminal sulfydryl are subjected to a click chemical reaction to obtain the polymer coupling grafting modified silicon dioxide nano particles. The polymer coupling grafting modified silicon dioxide improves the compatibility of the nano silicon dioxide particles and polyethylene oxide (PEO), so that the polymer coupling grafting modified silicon dioxide has good dispersity in the PEO.

The invention relates to a preparation method of water-based silicon dioxide core-shell structure coating liquid photovoltaic glass, and belongs to the technical field of photovoltaic glass, the preparation method comprises the following steps: S1, preparing raw materials of silicon dioxide, organosilane, fluoride and a water-based solvent; s2, preparing a coating solution, namely preparing a water-based silicon dioxide core-shell structure coating solution by a sol-gel method, adding silicon dioxide nanoparticles into deionized water, and dispersing to obtain silicon dioxide sol; adding a proper amount of organosilane and fluoride into the silicon dioxide sol, and uniformly mixing to form a core-shell structure; adjusting the pH value of the solution according to formula requirements; continuously stirring for a certain time to form a stable water-based dispersion liquid; s3, coating and drying are performed according to the surface morphology of the photovoltaic glass by selecting a dip-coating method, spray coating or spin coating; and drying treatment: putting the coated photovoltaic glass substrate into a drying oven, carrying out primary drying, and then carrying out medium-temperature annealing treatment.

The invention relates to the technical field of organic silicon coatings, in particular to a preparation method of a core-shell structure nano silicon dioxide composite organic silicon coating. The preparation method of the nano silicon dioxide composite organic silicon coating with the core-shell structure comprises the following steps: carrying out first emulsion polymerization on silicon dioxide nano particles and acryloyloxy alkyl alkoxy silane in a redox system, and then carrying out second emulsion polymerization with fluorine-containing acrylate to obtain a modified nano particle emulsion; and then mixing with organic silicon resin, and carrying out cross-linking curing to obtain the organic silicon coating. Acryloyloxy alkyl alkoxy silane and fluorine-containing acrylate are grafted on the surface of silicon dioxide through core-shell emulsion polymerization, and alkoxy silane in a redox system is hydrolyzed and cross-linked to connect polymerized chain segments into a network, so that fluorine-silicon modification of silicon dioxide is realized, and the dispersity of silicon dioxide is improved; the modified silicon dioxide is introduced into an organic silicon coating, so that the amphiphobic property of the organic silicon coating can be improved, and the mechanical property is improved while the surface energy of the coating is reduced.

The invention relates to a catalyst for ring-opening polymerization of ethylene oxide and a preparation method thereof, and belongs to the technical field of polymer material synthesis. The catalyst is a composite structure based on silicon dioxide nanoparticles loaded with bimetallic organic complexes. The invention adopts a special method to prepare a modified nitrogen-containing multidentate ligand, and coordinates with metal ions through covalent bonds to load the ligand on silicon dioxide nanoparticles. The high dispersibility and stability of silicon dioxide nanoparticles and the synergistic catalytic effect of bimetallic organic complexes are utilized to effectively improve the catalytic effect, accelerate the polymerization process, enhance the polymerization stability, increase the polymerization molecular weight, and narrow the distribution.

The invention discloses a self-cleaning nano coating of photovoltaic glass, and aims to provide a self-cleaning nano coating special for photovoltaic module glass so as to improve the long-term effectiveness, high light transmission, wear resistance and weather resistance of a module, reduce the maintenance cost and improve the power generation efficiency. The nano coating is composed of the following components in percentage by mass: 30%-45% of a phosphate binder, 8%-15% of hollow silicon dioxide nanoparticles, 5%-12% of modified antimony-doped tin oxide nano sol, 1%-3% of a silane coupling agent and the balance of water, belongs to the technical field of fine chemical engineering.

The invention provides an intelligent color-controllable photonic crystal continuous preparation system. The intelligent color-controllable photonic crystal continuous preparation system sequentially comprises a nano silicon dioxide particle preparation system, a silicon dioxide nano particle purification system, a photonic crystal liquid drop preparation system and a high-temperature calcination drying system, the nano silicon dioxide particle preparation system is used for obtaining a silicon dioxide nano particle emulsion; the silicon dioxide nanoparticle purification system is used for centrifugally purifying and drying the obtained silicon dioxide nanoparticle emulsion to obtain nano silicon dioxide particles; the photonic crystal liquid drop preparation system is used for preparing photonic crystal liquid drops; and the high-temperature calcining and drying system is used for collecting the photonic crystal liquid drops, drying and calcining to obtain the photonic crystal. The device has the advantages of a plate-type microreactor and a spiral capillary microreactor, solves the problems of microchannel blockage by particles, uneven mixing in the early stage of reaction and the like, realizes continuous preparation of high-monodisperse nano silicon dioxide particles in a certain period, remarkably improves the reaction yield, and is efficient and safe in process.

The invention discloses a waterproof antibacterial moisture-conducting home textile fabric and a preparation method thereof, and belongs to the field of textile fabric processing, the waterproof antibacterial moisture-conducting home textile fabric sequentially comprises a waterproof antibacterial outer layer, a sweat-absorbing middle layer and an antibacterial inner layer from top to bottom, and the waterproof antibacterial outer layer, the sweat-absorbing middle layer and the antibacterial inner layer are connected together in a laminated mode; the waterproof and antibacterial outer layer is used for preparing waterproof and antibacterial silicon dioxide nano particles through a method of initiating atom transfer radical polymerization on the surface, then the waterproof and antibacterial silicon dioxide nano particles are polymerized on the surface of the cotton fabric, the sweat-absorbing middle layer is composed of regenerated cellulose fibers with sweat-absorbing columns, and the antibacterial inner layer is formed by weaving bamboo fibers and milk protein fibers. The home textile fabric has excellent waterproof, antibacterial and moisture-conducting properties, and the washing resistance and the strength of the home textile fabric are basically not affected.

The invention relates to the technical field of lens masks, in particular to an expressway LED transparent lens mask and a preparation method thereof.The expressway LED transparent lens mask is prepared from, by weight, 80-90 parts of poly (methyl methacrylate)-b-poly (glycidyl methacrylate) block copolymer (PMMA-b-PGMA); 0.5 to 2.0 parts of nano-scale cerium doped zinc oxide (Ce-ZnO) quantum dots; 5 to 10 parts of a random ethylene-methyl acrylate-glycidyl methacrylate terpolymer; 1 to 3 parts of photochromic spiropyrane derivative modified silicon dioxide nanoparticles; according to the present invention, the high light transmittance is ensured, the active sites are provided through the PGMA block so as to easily achieve the uniform dispersion and the chemical bonding of other functional components, and the nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots are introduced so as to achieve the efficient ultraviolet ray blocking and the light stability;

The invention discloses a high-speed copper-clad plate material based on an epoxy resin system and a preparation method thereof, and belongs to the technical field of energy conservation and environmental protection. In order to solve the problems that a traditional copper-clad plate is high in dielectric loss, poor in heat conductivity and insufficient in heat resistance, fluorinated silicon dioxide nanoparticles (the surface energy is smaller than or equal to 18 mN / m) are prepared through a sol-gel method, and a boron nitride layer is modified through trisodium citrate and aminopropyltriethoxysilane; mixing with bisphenol A epoxy resin, a reactive diluent, a DOPO flame retardant, dicyandiamide and 2-methylimidazole to obtain a resin adhesive; adding nano filler and deionized water, mixing and defoaming at a high speed, presoaking 2116 glass fiber cloth to prepare a prepreg, laminating, matching with copper foil, performing segmented hot pressing, and performing secondary tempering. Dk of the obtained material is 3.1-3.35, Df is smaller than or equal to 0.0055, Tg is larger than or equal to 165 DEG C, heat conductivity is larger than or equal to 0.59 W / m.K, peel strength is larger than or equal to 1.78 N / mm, T288 is larger than or equal to 40 min, and the material is suitable for 5G high-speed PCBs and has low energy consumption and environmental friendliness.

The invention relates to a high-strength MBR (Membrane Biological Reactor) ultrafiltration membrane, a preparation system and method thereof and a spinning solution. According to the invention, a composite nano reinforcing agent composed of modified silicon dioxide and graphene oxide is innovatively introduced into a membrane solution. The two nano materials form a rigid-flexible synergistic enhanced network in a polymer matrix; the graphene oxide is used as a two-dimensional nanosheet layer, so that stress is effectively transmitted and dispersed; and the silicon dioxide nanoparticles are used as stress concentration points to prevent the propagation of microcracks. Meanwhile, the invention provides a set of composite reinforcement solution. The core of the scheme is that a polyester / polyamide high-density composite braided tube subjected to plasma surface treatment is adopted as a mechanical skeleton of the membrane, and main operation stress is borne from the macroscopic scale. The multi-stage synergistic enhancement mechanism from the macroscopic braided tube to the nanoscale endows the membrane filament with mechanical strength far beyond the conventional level and fatigue and filament breaking resistance.

The invention relates to the technical field of refractory materials, in particular to a refractory composite material and application thereof in cables. The material comprises phlogopite paper, alkali-free glass fiber thin cloth compounded on a first surface of the phlogopite paper, and an inner bonding layer and an outer bonding layer which are respectively arranged on two surfaces of the phlogopite paper. The key improvement is that the inner bonding layer and the outer bonding layer adopt silicon-containing ceramic bonding base materials and have the gradient distribution design of hydrated zinc borate, and inorganic silica ceramic seed layers with epoxy reaction sites are constructed on the surfaces of the phlogopite paper and the glass fabric in advance. Through dopamine coating and boron-containing siloxane grafting modification of silicon dioxide nanoparticles, interface bonding and high-temperature ceramic forming properties are significantly enhanced. The problems that a traditional fireproof mica tape loses high-temperature interlayer bonding force and is prone to pulverization are solved, good flexibility is ensured, and meanwhile the fireproof power supply time and the structural integrity of the cable under the impact of flames at the temperature of 750 DEG C or above are remarkably prolonged and improved.

The invention provides an anti-dazzle coating liquid, an anti-dazzle film and a preparation method of the anti-dazzle film, and relates to the technical field of anti-dazzle materials. The preparation method of the anti-dazzle film comprises the following steps: uniformly mixing anti-dazzle particles and a cross-linking agent to prepare an anti-dazzle film coating solution; coating a substrate with the anti-dazzle coating liquid, and curing to form an anti-dazzle coating; the anti-dazzle particles are hollow nanometer titanium dioxide microspheres, and the cross-linking agent is silicon dioxide nanoparticles. The characteristic that the refractive indexes of the anti-dazzle particles and the cross-linking agent are different is utilized, so that light enters interfaces with different refractive indexes, the light propagation direction is changed, and the anti-dazzle effect is achieved; by utilizing the hollow parts of the titanium dioxide microspheres, light rays are refracted twice and reflected multiple times when passing through the anti-dazzle particles, the light ray dispersion effect is achieved in the anti-dazzle coating, the anti-dazzle effect does not need to be improved by means of the rough surface of the anti-dazzle film, and the surface of the anti-dazzle film is smooth; meanwhile, the glossiness and haze of the anti-dazzle film can be adjusted in a large range, and the anti-dazzle film is high in mechanical strength.

The invention discloses a super-hydrophobic activated carbon material, a preparation method and application thereof, and relates to the technical field of activated carbon production, the super-hydrophobic activated carbon material comprises the following raw materials by mass: 70-90 parts of activated carbon, 5-15 parts of silica nanoparticles, 1-5 parts of fluorosilane, and 3-7 parts of a reinforcing modifier. According to the invention, the reinforced modifier is added into the raw materials, dopamine is subjected to self-polymerization reaction in an alkaline borate buffer solution to form polydopamine, and the polydopamine contains a large amount of catechol, amino and other active functional groups, so that when the pretreated activated carbon B is immersed into the reinforced modifier, the polydopamine is deposited on the surface of the activated carbon, and the activated carbon B is subjected to self-polymerization reaction to form the modified activated carbon. More binding sites are provided for the self-assembly of the modified particles A through the active groups, the physical adsorption and chemical bonding effects between the modified particles A and the activated carbon are enhanced, so that the actual use effect of the super-hydrophobic activated carbon is enhanced, the production process is optimized in the production process, and the functionality is enhanced.

By using a water-based primer composition, a primer layer is formed on the surface of a substrate, thereby enabling the manufacture of water-repellent articles with excellent abrasion resistance and chemical resistance. The water-based primer composition is used in the formation of the primer layer of a water-repellent article having a primer layer on the outer surface of the substrate and a water-repellent surface layer on the outer surface of the primer layer. The primer composition is characterized by comprising silica nanoparticles and a metal compound comprising any one or more of niobium, hafnium, zirconium, and tantalum, wherein the mass ratio of the metal compound to the silica nanoparticles is 5% or more and less than 1000%.

The invention relates to the technical field of composite materials, in particular to a high-transparency low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof. The invention provides a high-transparency and low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof, aiming at the problem that modified polycarbonate cannot give consideration to high light transmittance, low haze, high modulus and high flame retardance in the prior art. Comprising polycarbonate resin, cycloolefin copolymer resin, surface fluorinated silicon dioxide nanoparticles, surface modified C-glass fibers, a core-shell structure flame retardant, a potassium perfluorobutanesulfonate ionic liquid complex, an anti-dripping agent, an antioxidant and an ultraviolet absorbent. According to the invention, through PC / COC matrix refractive index matching and surface modified C-glass fiber surface five-layer gradient coating design, an ultralow refractive index is realized, surface fluorinated silica nanoparticles fill interface microdefects, extremely low interface light scattering is realized, and a highly transparent state is presented.

The invention relates to the technical field of demolding, and particularly discloses a novel semi-permanent superoleophobic demolding agent and a preparation method thereof. The release agent is prepared from the following raw materials in percentage by weight: 1.0 to 3.5 percent of fluorinated polyhedral oligomeric silsesquioxane, 1 to 10 percent of fluorinated silicon dioxide nanoparticles, 1 to 4 percent of alpha-cyanoacrylate adhesive, 1 to 3 percent of perfluoroalkyl silane, 0.1 to 1 percent of pyridine, 0.1 to 0.5 percent of silane coupling agent and the balance of solvent. The release agent disclosed by the invention has the characteristics of excellent super-oleophobicity, excellent wear resistance, outstanding chemical stability, relatively strong adhesive force, wide applicability and the like, can play a good barrier role between a molded surface and a base material, reduces the probability of adhesion between molded parts, and is relatively low in probability of transferring to the surfaces of the molded parts, so that the release agent can be applied to the surface treatment of the molded parts. Therefore, the recoating frequency is obviously reduced, and the labor cost and the material consumption are reduced.

The application discloses a preparation method of a low-refractive composite powder and application thereof. The preparation method of the low-refractive composite powder comprises the following steps: mixing submicron powder with a mixture containing tetraethyl orthosilicate, heating, and reacting under an acidic condition to obtain a first sol slurry; mixing and stirring the first slurry with a binder to obtain a second slurry; and performing spray granulation and calcination on the second slurry to obtain a low-refractive core-shell structure composite powder. According to the technical scheme, the high-refractive or high-absorbance submicron powder, which is not suitable for or cannot be used for 3D printing, is covered with the silicon dioxide nanoparticles formed by the reaction of the mixture containing tetraethyl orthosilicate on the surface of the submicron powder, so that the refractive index or the absorbance of the submicron powder is reduced, the refractive index difference between the ceramic powder material which is difficult to solidify or cannot be solidified and the photosensitive resin is reduced, and the solidification performance of the ceramic material is improved.

This application discloses a coating solution and its preparation method and application, relating to the field of coated photovoltaic glass technology. The coating solution includes water and hollow silica nanoparticles and solid silica nanoparticles dispersed in the water. The coating solution provided in this application uses hollow silica nanoparticles instead of traditional core-shell structure particles. During the tempering process, hollow silica nanoparticles do not exhibit large-scale thermal decomposition of polymeric substances and do not generate gas pressure in the film layer, thus avoiding the formation of pores in the film layer and improving the stability of the final coating.

The invention belongs to the field of solar cells, and discloses a multilayer silicon dioxide nanoparticle, a preparation method thereof, an antireflection film and a solar cell. The multilayer silicon dioxide nanoparticles comprise a hollow inner core, a silicon dioxide mesoporous middle layer and a silicon dioxide coating shell. The preparation method disclosed by the invention is simple, the reaction condition is mild and non-toxic, the efficiency is high, the template agent is thoroughly removed, and the synthesized multilayer silicon dioxide nanoparticles are high in porosity, good in light transmission effect, good in dispersity and relatively good in mechanical strength.

To provide a thermally conductive resin composition which is excellent in heat resistance and suppresses deterioration of long-term insulation reliability after heat treatment.SOLUTION: A thermally conductive resin composition comprising: a thermosetting resin; a thermosetting agent; and an inorganic filler, wherein the thermosetting agent comprises an imide oligomer, and the inorganic filler comprises boron nitride aggregate particles and silica nanoparticles.SELECTED DRAWING: None

The invention discloses polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles, a preparation method of the polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles and application of the polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles in beer clarification. The material comprises a Fe3O4 (at) SiO2 core-shell nano particle (silicon dioxide wraps ferroferric oxide nano particles) carrier and a linear polyvinyl pyrrolidone (PVP) polymer grafted on the surface of the carrier. The material can be used for efficiently adsorbing polyphenol substances in beer primary pulp, second-level rapid separation is achieved through an external magnetic field, operation is easy and convenient, good recycling performance is achieved, and a new solution is provided for beer clarification.

The invention discloses a waterborne polyurethane flame-retardant coating and a preparation method thereof, and relates to the technical field of coating materials. The waterborne polyurethane flame-retardant coating at least comprises the following raw materials in parts by mass: 100 parts of flame-retardant modified polyurethane emulsion; 2 to 3 parts of gamma-aminopropyl triethoxy silane; 0.5 to 1 part of fluorinated silicon dioxide nano particle dispersion liquid; 0.1 to 0.2 part of an organic tin catalyst; 0.2 to 0.3 part of a wetting leveling agent; 0.1 to 0.2 part of a defoaming agent; the flame-retardant modified polyurethane emulsion at least comprises the following raw materials in parts by mass: 20-30 parts of castor oil; 5 to 15 parts of polyester polyol; 15 to 25 parts of isophorone diisocyanate; 1.5 to 2.5 parts of dimethylolpropionic acid; 3 to 8 parts of a branched flame retardant containing phosphorus, nitrogen and silicon; 0.5 to 2 parts of gamma-(methacryloyloxy) propyl trimethoxy silane; 0.03 to 0.08 part of dibutyltin dilaurate; 1 to 2 parts of triethylamine; and 100 parts of deionized water. A coating prepared from the waterborne polyurethane flame-retardant coating has excellent flame retardance, durable stain resistance, self-cleaning performance and wear resistance.

The invention discloses a hollow silicon dioxide nanoparticle, a preparation method thereof and an obtained product, the hollow silicon dioxide nanoparticle provided by the invention has an average hollow rate of 50%-70%, an average particle size of 20-80nm and a hydroxyl content of 16%-25% on the surface, the hollow silicon dioxide nanoparticle provided by the invention can exist stably, and the hollow silicon dioxide nanoparticle can be used as a hollow silicon dioxide nanoparticle. The hollow silicon dioxide nanoparticles are not easy to generate hard agglomeration or soft agglomeration and are dispersed in an organic system without generating precipitates, and in addition, the hollow silicon dioxide nanoparticles have a high cavity rate and a proper content of silicon hydroxyl, so that the refractive index of the particles is reduced, and the anti-reflection performance of the anti-reflection film is improved.

The invention provides a preparation method of super-hydrophobic TPU (thermoplastic polyurethane) foam for oil-water separation and the super-hydrophobic TPU foam. The preparation method comprises the following steps: S1, preparing super-hydrophobic thermoplastic polyurethane, namely a porous matrix of the TPU foam; s2, modifying the porous matrix to obtain the super-hydrophobic TPU foam. According to the prepared super-hydrophobic TPU foam, thermoplastic polyurethane, namely TPU, serves as a porous matrix of the super-hydrophobic foam, silicon dioxide nanoparticles are attached to the surface of the porous matrix of the super-hydrophobic TPU foam, and the super-hydrophobic TPU foam is obtained. The problems that in the prior art, the manufacturing process of materials is very complex, the hydrophobicity of the materials is poor, the surface structure is fragile, and in the application process, the efficiency is reduced along with the use time, and the hydrophobicity is reduced are solved.

The invention discloses a waterproof and antibacterial polyester composite fiber and a preparation method thereof, and belongs to the technical field of functional composite fiber materials, the waterproof and antibacterial polyester composite fiber provided by the invention is composed of a three-layer composite structure of a core layer, a middle layer and a shell layer, the middle layer is formed by blending hydrophobic modified silicon dioxide nanoparticles and copolyester; the shell layer is formed by blending a hydrophobic zeolite molecular sieve and a fluorine-containing acrylate copolymer; the preparation method of the polyester composite fiber adopts a bi-component skin-core composite melt spinning method. Through three-layer structural design and component optimization, the waterproof, antibacterial and high-strength synergistic interaction is realized on the polyester fiber for the first time, the durability is remarkably superior to that of the prior art, and an innovative solution is provided for functional textiles.

The invention discloses a preparation method and application of a high-temperature-resistant microcapsule suitable for nylon melt spinning, and belongs to the technical field of fiber materials. The invention aims to solve the problems that the existing phase change microcapsule (PCM) is easy to damage and leak during high-temperature melt spinning of chinlon due to insufficient heat resistance, and the finished fabric is easy to yellow due to illumination. According to the method, silicon dioxide nanoparticles are adopted as a Pickering stabilizer to form an oil-in-water emulsion, isophorone diisocyanate and triethylene tetramine are subjected to a polymerization reaction on an oil-water interface, a high-temperature-resistant polyurea / SiO2 hybrid wall material is formed, and a phase change core material n-octadecane is coated. Compared with the prior art, the microcapsule prepared by the invention is good in thermal stability and can bear a high-temperature environment of nylon melt spinning; the particle size distribution is uniform and ranges from 0.50 mu m to 2.72 mu m, and a spinneret plate is not prone to being blocked; and the wall material does not contain formaldehyde, so that the product safety is high.