31results about How to "Scattered tightly" patented technology

The invention relates to a graphene composite powder material comprising a graphene material and a micro-nano structural material attached to the surface of the graphene material. The micro-nano structural material is uniformly dispersed in the graphene material and is compounded with the graphene material by virtue of chemical bonds or physical effects. The graphene composite powder material is good in dispersity and less in clustering possibility. The invention also relates to a preparation method of the graphene composite powder material.

The invention discloses a 3D printing reinforcement/Ti2AlNb base composite material and a preparation method thereof, and belongs to the field of metal material manufacturing. The preparation method comprises the following steps: (1) Ti2AlNb spherical prealloy powder is used as a basal body; and TiB2, graphene or TiC powder is used as reinforced particles; (2) the selected powder is mixed for mechanical stirring; (3) the pre-stirred powder is mixed through dry ball milling; (4) a three-dimensional pattern of a needed sample is designed by using a computer; and drawing procedures are input intoa 3D printer; and (5) the ball-milled mixed powder is scanned layer by layer according to preset procedures to finally prepare the needed composite material. The process is simple; all the componentsare excellent in stability; a reinforcing phase is tightly combined with the basal body, and a second phase generated in the laser melting process achieves a pinning effect in metal; and the reinforcing phase and the second phase are coacted to achieve a refined crystalline strengthening effect, so that the defects of the material after 3D printing can be eliminated. The composite material is small in average grain size, and prominently optimizes the hardness and the friction and wear performances of the material.

The invention discloses a wear-resistant antibacterial coating for a polythene fishing net. By adding kaolin-zinc oxide whiskers-nano silver wear-resistant antibacterial agent in the coating, the properties of wear resistance, aging resistance, anti-static property and antibacterial property of the coating are improved, the wear-resistant antibacterial coating is applied to the polythene fishing net, and can be adsorbed to the fishing net well, furthermore, the wear resistance and antibacterial property of the fishing net are enhanced, biofouling of the fishing net is prevented effectively, meanwhile, the service life of the fishing net is prolonged, and the cost is saved.

The invention relates to a preparation and application method of a self-repairing flame-retardant melt-drop-resistant wear-resistant polyurethane coating, the method comprises the following steps: loading isocyanate on vacuum glass beads HGB-DI, adding polypropylene glycol, polytetrahydrofuran glycol, isophorone diisocyanate and HGB-DI into a reaction container under the protection of nitrogen, heating the system to 80 DEG C, adding a solvent into a reaction kettle, adding dibutyltin dilaurate, a chain extender 2, 2-dithiodiethanol and a nitrogen-phosphorus intumescent flame retardant, cooling to 50-70 DEG C, and adding a thickening agent N, N-diethyl formamide; then cooling to 40 DEG C, adding triethylamine to obtain a transparent viscous liquid, cooling to room temperature, and adding deionized water, epoxy resin E51, trimethylolpropane trimethacrylate and 3, 4 '-diaminodiphenyl ether to finally obtain the polyurethane emulsion, and the obtained polyurethane emulsion is obviously superior to the prior art in flame-retardant self-repairing, molten drop resistance and wear resistance.

The invention discloses a preparation method of a cross-linked polystyrene building thermal insulation material, a cyanamide polymer is mixed with water emulsion containing aluminium dihydrogen phosphate, and a foaming agent is introduced in the reaction process of cyanamide and ricinoleic acid for foaming to effectively promote the filling effect of the aluminium dihydrogen phosphate in the polymer matrix further to improve the stability strength of the finished product. The finished material has good foaming stability, mechanical property, good thermal insulation property and excellent comprehensive performance.

The invention relates to a preparation method of high-color-fastness water-based acrylate resin color paste, the resin color paste, and application and the use method of the resin color paste. The water-based acrylate resin color paste is a polymer with a core-shell structure, wherein an inner core polymer is a composition of an acrylate polymer and a pigment, and a shell polymer is a water-basedacrylate polymer synthesized in an emulsion polymerization manner. According to the invention, the pigment is added in a reaction process, a molecular chain in a polymer solution synthesized by solution polymerization and the pigment are dispersed more uniformly and combined more tightly, and after the polymer is self-emulsified to form emulsion particles, the pigment is uniformly dispersed and wrapped in the emulsion particles; and thus, the situation of phase separation caused by nonuniform pigment dispersion and pigment aggregation in the film forming process of the paste is reduced, and the color fastness of the water-based acrylate resin color paste is greatly improved.

The invention discloses anti-wear paint applied to suitcase and a preparation method thereof and relates to the technical field of paint. The anti-wear paint is prepared from the following raw materials in parts by weight: 65 to 85 parts of epoxy resin, 35 to 45 parts of tung oil, 25 to 35 parts of acetic ether, 20 to 25 parts of modified silicon carbide, 15 to 20 parts of modified nano silicon dioxide, 10 to 12 parts of modified nano titanium oxide, 10 to 12 parts of modified quartz powder, 5 to 8 parts of trioxane, 5 to 8 parts of barium sulfate, 3 to 6 parts of polymethyl methacrylate, 3 to6 parts of zinc borate, 1 to 4 parts of sodium phytate, 1 to 4 parts of curing agent, 1 to 4 parts of methyl isothiazolinone, 0.6 to 1.2 parts of sodium dodecyl benzene sulfonate, 14 to 16 parts of aid and 25 to 35 parts of water. The anti-wear paint disclosed by the invention has the advantages of excellent wear resistance and ageing resistance.

The invention discloses an inorganic fire-prevention rust-prevention coating for steel structures and a preparation method thereof. The coating is a mixture of powder and colloid. The weight ratio of power to colloid is 1:(0.8-1.2). The colloid is potassium metasilicate. The powder is prepared from the following components in percentage by weight: 5-40% of magnesium mountain powder, 5-40% of talcum powder, 4-35% of silica powder and 4-25% of silicon aluminium powder. The granularity of the magnesium mountain powder is 2500-6500 meshes, the granularity of the talcum powder is 2000-6000 meshes, the granularity of the silica powder is 3000-8000 meshes, and the granularity of the silicon aluminium powder is 600-2000 meshes. According to the preparation method of the inorganic fire-prevention rust-prevention coating for steel structures, provided by the invention, the powder and the colloid are mixed uniformly. The inorganic fire-prevention rust-prevention coating for steel structures has good high-temperature-resistant performance and good rust-prevention effect.

The invention discloses a preparation method of an elastic complex, comprising the following steps: (1) preparing modified white carbon black grinding slurry or carbon black grinding slurry in a nonpolar organic solvent, marking the modified white carbon black grinding slurry or carbon black grinding slurry as filler slurry, and marking the modified white carbon black or carbon black as a filler; (2) dispersing and mixing the filler slurry or filler and a rubber glue solution proportionally under high-energy shearing to form a complex slurry glue solution; (3) removing the solvent from the uniformly dispersed and mixed complex slurry glue solution by a dry method under a dynamic state; and (4) shearing, kneading and drying the solvent removed complex to obtain the product; wherein the nonpolar organic solvent in the step (1) and the solvent used by the rubber glue solution in the step (2) are aliphatic hydrocarbon, alicyclic hydrocarbon or aromatic series nonpolar organic solvents.

The invention discloses a method for inhibiting migration of a plasticizer in an esterified starch film and an esterified starch film. The method comprises the following steps: (1) adding starch milk with a certain moisture content into a high-temperature high-pressure reaction kettle, controlling the pH of the system, adding acetic anhydride or propionic anhydride, stirring and reacting for 0.5-4.0 hours at a temperature of 80-100 DEG C, then, adding water to precipitate, filtering and drying to obtain esterified starch; (3) dissolving the esterified starch in acetone to prepare a 40% solution, adding a 20-30% plasticizer, spraying on a polytetrafluoroethylene plate though a fluidized bed at a temperature of 50-55 DEG C with a spraying rate of 1.0-2.8mL/min and atomizing pressure of 0.5-1.5MPa to form a semitransparent film, thereby obtaining the esterified starch film. The method disclosed by the invention can be used for reasonably controlling an aggregation state structure inside the esterified starch film, so that the good in effect in inhibiting the migration of the plasticizer is achieved, the operability is strong and the applied range is wide.

The invention discloses a composite nano waterproof heat-insulating coating for buildings and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared fromthe following raw materials in parts by weight: 150-200 parts of emulsion, 60-80 parts of waterborne polyurethane, 60-80 parts of filler, 60-80 parts of a heat insulation composite nano material, 30-50 parts of an organic silicon hydrophobic agent, 5-10 parts of a coalescing agent, 3-6 parts of a defoaming agent and 3-6 parts of a synergist. According to the invention, a large amount of heat-insulating composite nano-materials are added, the hydrophobic and heat-insulating properties of the material are greatly improved through two-step modification of acid etching and hydrophobicity, and meanwhile, the added synergist has very strong adhesion ability, can be firmly adsorbed on the surfaces of the nano-materials and filler particles, and is stably dispersed in the coating, and the peelingand cracking phenomena of the subsequent coating are greatly reduced and the service life of the coating is prolonged. The coating has the advantages of good heat-insulating effect, good water resistance and long service life, and has wide market application potential.

The invention relates to the technical field of novel materials and discloses plastic dipping liquid for anti-aging clothes hangers. The plastic dipping liquid is prepared from PVC resin, a plasticizer, melamine, sulfonic acid modified alkyd resin, inorganic nano filler, an antifoaming agent and color masterbatch. The plastic dipping liquid for the anti-aging clothes hangers has advantages that bycoating plastic formed on surfaces of the clothes hangers through plastic dipping, a clothes hanger protecting effect can be improved; produced plastic coated hangers subjected to plastic dipping inthe plastic dipping liquid have elegant porcelain gloss and are colorful, high in adhesion, wear resistance, pulling resistance, heat resistance and insulativity, great in hand feeling, long in service life and excellent in aging resistance.

The invention discloses a novel production process for preparing an organic-inorganic composite water retaining agent. The novel production process comprises the following steps: a, mixing sodium hydroxide with deionized water, and adding the obtained mixture into acrylic acid under the condition of an ice water bath so as to obtain a product A; b, mixing titanium dioxide dispersion with deionizedwater to obtain a product B; c, mixing the product A, the product B and acrylamide, pouring the obtained mixture into a quartz tube and carrying out ultraviolet irradiation in a nitrogen atmosphere to obtain a photopolymerization product, i.e., a product C; d, mixing N,N-methylenebisacrylamide, ammonium persulfate and deionized water to obtain a product D; e, mixing and heating the product C andthe D product in the nitrogen atmosphere to obtain a product e; and f, soaking the product e in alcohol and then carrying out drying so as to obtain a finished product. The novel production process inthe invention solves the problems that the organic-inorganic interface of a traditional water retaining agent is not tightly combined and the traditional water retaining agent is difficult to degradeafter repeated use, prevents the water retaining agent from becoming the next white pollutant, and is of great significance to the improvement of the combination of the organic-inorganic interface ofthe water retaining agent and to the realization of degradation of the water retaining agent after repeated use.

The invention provides conductive nano composite hydrogel as well as a preparation method and application thereof, and belongs to the technical field of conductive polymer materials. The conductive nano composite hydrogel provided by the invention comprises a hydrogel matrix and conductive nano particles uniformly dispersed in the hydrogel matrix, the hydrogel matrix is a mixture of polyacrylic acid and poly (N-isopropylacrylamide); the conductive nano particles are tyrosine modified polypyrrole. The conductive nano-composite hydrogel provided by the invention has sensitive stress and temperature signal response capability and excellent conductivity, so that stress and temperature signals can be converted into electric signals for monitoring multiple signals.

The invention provides a modified ethylene-methyl acrylate copolymer as well as a preparation method and application thereof. According to the preparation method, the nickel complex catalyst is prepared, and the catalyst is used for efficiently catalyzing the copolymerization process of ethylene and methyl acrylate, so that the ethylene-methyl acrylate copolymer is obtained; then ethylene-methyl acrylate copolymer and silicon dioxide nanoparticles react with vinyltrimethoxysilane, and then blend crosslinking is carried out to prepare the modified ethylene-methyl acrylate copolymer. Through the mode, the structure and the performance of the ethylene-methyl acrylate copolymer can be regulated and controlled by utilizing the catalyst, so that the efficient modification process is promoted; so that the prepared modified ethylene-methyl acrylate copolymer has a high melting point and excellent mechanical properties and corrosion resistance at the same time. The copolymer can be applied to a reverse osmosis membrane supporting material and has relatively high practical application value.

The invention discloses a preparation method for microwave-absorbing ferrite. The preparation method comprises the following steps: S1, adding Mn(NO3)2.4H2O, Zn(NO3)2.6H2O, Fe(NO3)3.9H2O to water and dissolving, adding cetyl trimethyl ammonium bromide and uniformly mixing, dropwise adding sodium hydroxide water solution until pH is equal to 10.5-11.5, continuously stirring in the dropwise adding process, raising the temperature to 70-75 DEG C, and keeping the temperature for 2.5-3 h, filtering and taking a filter cake, calcining, and ball-milling to obtain nano-ferrite; and S2, adding the nano-ferrite obtained in the step S1 to ethyl alcohol, and uniformly dispersing to obtain ferrite sol; uniformly mixing zinc acetate and the ethyl alcohol, to obtain solution A by the ultrasound treatment; adding ferrite sol to the solution A, uniformly mixing, performing the ultrasound treatment, raising the temperature, dropwise adding the sodium hydroxide water solution, keeping the temperature and stirring, filtering and taking the filter cake, washing, regulating the temperature, to obtain the microwave-absorbing ferrite by the vacuum drying.