7589 results about "Oxide zinc" patented technology

The present invention addresses the problem of providing a rubber composition with which it is possible to improve the ratio of a sustainable material in a rubber product and to improve the elongation at break (EB) after heat deterioration. The rubber composition is characterized in that: it contains a rubber component (A), recovered carbon black (B), a quinoline-based anti-aging agent (C), and a zinc oxide (D); in that the total styrene content of the rubber component (A) is less than or equal to 5 mass%; and in that the mass ratio [zinc oxide (D) / quinoline-based anti-aging agent (C) ] between the zinc oxide (D) and the quinoline-based anti-aging agent (C) is greater than 0 and less than or equal to 3.0.

The invention discloses a metallocene polyethylene material, a composite mulching film and a preparation method thereof, and the metallocene polyethylene material comprises the following raw materials by mass: 75-85 parts of metallocene polyethylene resin, 15-25 parts of high density polyethylene, 0.05-0.2 part of a main antioxidant, 0.1-0.25 part of an auxiliary antioxidant, 1-2 parts of silane coupling agent modified nano zinc oxide, and 1-2 parts of silane coupling agent modified mica powder. And 0.05 to 0.2 part of a slipping agent. The prepared metallocene polyethylene composition has the advantages of excellent processability, tensile strength, mechanical strength, aging resistance and the like.

The present invention belongs to the technical field of glass preparation, and specifically relates to an ultra-white glass and a preparation method thereof. The ultra-white glass of the present invention is composed of the following raw materials by weight: 110 parts of quartz sand, 18-20 parts of sodium carbonate, 14-16 parts of colemanite, 4.5-5.5 parts of magnesia, 2.6-2.8 parts of calcined alumina, 1.1-1.3 parts of potassium oxide, 0.8-1.0 parts of zinc oxide, 1.5-1.7 parts of phosphorus pentoxide, 0.15-0.20 parts of strontium chloride, 0.3-0.34 parts of calcium fluoride, 0.25-0.27 parts of barium nitrate, and 0.16-0.18 parts of zirconium oxide. The ultra-white glass of the present invention has a synergistic effect between the raw materials to ensure that the prepared ultra-white glass has excellent whiteness and visible light transmittance.

This application relates to an EPP material and a folding mat using this EPP material, which relates to the field of EPP material technology. The EPP material is formed into a plate by welding EPP particles, and the surface of the plate is coated with a hydrophobic antibacterial paint. The raw materials for preparing the EPP particles include 80-100 parts by weight of polypropylene resin, 1-3 parts by weight of a nucleating agent, 6-8 parts by weight of a modified graphene composite material, 5-10 parts by weight of a flame retardant, 5-15 parts by weight of a reinforcing agent, and 0.5-1.5 parts by weight of a surfactant. The raw materials for preparing the modified graphene composite material include hydrophobic modified graphene oxide, hydrophobic antibacterial nano-zinc oxide, and a modified ammonium polyphosphate coupling agent. The folding mat using this EPP material includes an EPP material, a surface layer, and a sewing thread, and the surface layer and the EPP material are fixedly connected by the sewing thread. This application has the effect of improving the flame retardancy, waterproofness, and antibacterial properties of EPP material, and the resulting tatami mat is environmentally friendly, comfortable, and has a good user experience.

The present invention addresses the problem of providing a rubber composition with which it is possible to improve the ratio of a sustainable material in a rubber product and to improve the elongation at break (EB) after heat deterioration. The rubber composition is characterized in that: it contains a rubber component (A), a recovered carbon black (B), at least 2 types of anti-aging agent (C), and a zinc oxide (D); and in that the mass ratio between the recovered carbon black (B) and the zinc oxide (D) [recovered carbon black (B) / zinc oxide (D)] is greater than 0 and equal to or less than 5.0.

The invention relates to the technical field of ceramics, in particular to anti-fouling ceramic glaze water, anti-fouling ceramic and a preparation method of the anti-fouling ceramic glaze water, and the anti-fouling ceramic glaze water comprises the following raw materials in parts by weight: 10-15 parts of quartz, 5-10 parts of calcite, 5-8 parts of a silicon nitride-doped adhesion increasing agent, 4-7 parts of zinc oxide, 4-7 parts of spodumene and 4-7 parts of a modification regulator. According to the anti-fouling ceramic, the calcined talc, the potassium feldspar, the kaolin, the mullite and the water are subjected to blending and ball milling treatment, wet ball milling improvement is performed, the raw materials are blended and coordinated, a ceramic body is prepared through shaping treatment, meanwhile, anti-fouling ceramic glaze water is adopted for glazing, the silicon nitride-doped connecting agent and the modification regulator are added, and the silicon nitride-doped connecting agent and the modification regulator are matched and have a synergistic effect, so that the anti-fouling ceramic is prepared. The mechanical strength, the pollution resistance and the wear resistance of the obtained product are improved in a balanced manner, and meanwhile, the freezing resistance and the corrosion-resistant stability effect of the product are remarkable.

The invention relates to the technical field of ceramics, in particular to a preparation method of a heat-resistant ceramic marmite. The heat-resistant ceramic marmite is composed of a green body and a glaze surface, and the green body is prepared from, by weight, 30-35 parts of fused quartz, 8-10 parts of petalite, 9-11 parts of kaolin, 19-21 parts of washed illite clay, 5-7 parts of sepiolite, 5-6 parts of andalusite, 7-9 parts of coal gangue, 0.2-0.7 part of zinc spinel and 2-3 parts of talc; the glaze surface is prepared from the following raw materials in parts by weight: 18 to 20 parts of fused quartz, 14 to 16 parts of petalite, 12 to 14 parts of kaolin, 5 to 6 parts of calcium oxide, 1.5 to 2 parts of zinc oxide, 1 to 1.5 parts of strontium oxide, 8 to 10 parts of spodumene, 0.6 to 0.8 part of lanthanum oxide, 8 to 10 parts of ZrSiO4 coated Al2O3 and 1.2 to 1.8 parts of pigment. The prepared ceramic marmite has the advantages of matt appearance, higher thermal stability, low water absorption rate and excellent comprehensive performance, and is not easy to crack and wear.

The invention relates to the technical field of multi-layer composite fabrics, and discloses a waterproof moisture-permeable composite fabric based on a bio-based material and a preparation method of the waterproof moisture-permeable composite fabric. The preparation method comprises the following steps: preparing an amino silanized zinc oxide / cellulose nanocrystal composite material, and carrying out mixed condensation polymerization on the amino silanized zinc oxide / cellulose nanocrystal composite material and vanillin cyclic carbonate to obtain an antibacterial agent; castor oil-based polyurethane, an antibacterial agent and a solvent are mixed and then subjected to electrostatic spinning, and after the electrostatic spinning and the pretreated polyester fabric are subjected to hot-pressing compounding, the obtained composite fabric has excellent waterproof and moisture permeable performance and good antibacterial performance.

The invention relates to the technical field of PVC pipe production and processing, and particularly discloses a PVC pipe composition and a preparation method of a PVC pipe. PVC resin and PE resin are compounded, the problem of PVC decomposition caused by high temperature in the processing process is reduced, meanwhile, the PE resin has good flexibility, and by compounding the PVC resin and the PE resin, the PVC resin and the PE resin have good flexibility, so that the PVC pipe composition is more stable in performance. The mechanical property of the PVC pipe can be improved; 4-carboxyphenylboronic acid in the composite modified attapulgite provided by the invention forms a B-O-B cross-linked network structure at a high temperature, the 4-carboxyphenylboronic acid can have a synergistic effect with composite metal oxides (zinc oxide and manganese oxide), the thermal stability and compactness of a carbon layer are improved, and the flame retardant property of the PVC pipe is further improved; a flexible alkyl long-chain structure is formed through copolymerization of 1, 4-diol, reversible deformation occurs under the action of external force, and the mechanical property of the PVC pipe is further improved.

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

The invention discloses a high-performance ozone-resistant air spring and a preparation method thereof. An inner-layer rubber material and an outer-layer rubber material of the air spring are mainly prepared from the following components: chloroprene rubber, natural rubber, butadiene rubber, an anti-aging agent AW-66, an anti-aging agent 4010NA, an anti-aging agent 4020, microcrystalline wax, N660 carbon black, naphthenic oil, zinc oxide, CZ and insoluble sulfur. The preparation method comprises the steps of first-stage mixing, rubber discharging, standing, second-stage mixing, rubber discharging, standing, rubber sheet calendering, blastocyst forming, wrapping the blastocyst on the surface of a capsule, and performing high-pressure nitrogen vulcanization to form the air spring. The chloroprene rubber, the natural rubber and the butadiene rubber are blended and modified, so that the rubber has the following characteristics that the ozone resistance and the weather aging resistance are remarkably improved; the properties such as tensile strength, stress at definite elongation and tear resistance are improved; the production process properties such as extrusion and calendaring properties are improved, the deflection resistance of the rubber material is improved, and the service life of the product is prolonged.

The embodiment of the invention discloses a biological composite liquid material capable of releasing negative oxygen ions as well as a preparation method and application of the biological composite liquid material. The invention discloses a preparation method of a traditional Chinese medicine. The biological composite liquid material is prepared from 12 to 18 parts of plant extract, 1 to 4 parts of silver ion solution, 2 to 5 parts of titanium dioxide, 10 to 15 parts of nano silicon dioxide, 2 to 8 parts of sodium oxide, 1 to 6 parts of magnesium oxide dispersion liquid, 0.5 to 1.5 parts of calcium hydroxide solution, 1 to 3 parts of ferric oxide colloidal solution, 2 to 6 parts of zinc oxide dispersion liquid, 12 to 18 parts of mixed silica sol and 15 to 20 parts of nano borosilicate liquid material. 0.5-1.5 parts of a surfactant, 4-8 parts of glycerol and 10-15 parts of deionized water. The biological composite liquid material has the characteristic of efficiently releasing negative oxygen ions, can effectively improve the air quality, is good in stability, convenient to use, safe and reliable, can be widely applied to the fields of air purification, medical care, building materials and the like, and has a wide market prospect.

The invention provides a degradable environment-friendly packaging material and a preparation process thereof, and belongs to the technical field of packaging materials. The preparation method comprises the following steps: preparing the modified nano montmorillonite; preparing a composite antibacterial additive; preparing a barrier additive; and preparing the degradable environment-friendly packaging material. The preparation method comprises the following steps: by taking methacrylic acid (2-dimethylaminoethyl) ester and acrylic acid as raw materials, modifying nano-montmorillonite under the initiation of benzoyl peroxide, performing quaternary ammonium salinization, and performing in-situ synthesis of nano-zinc oxide on the surface of the quaternary ammonium salinized montmorillonite through a hydrothermal reaction to prepare the composite antibacterial additive. When the composite antibacterial additive is added into polylactic acid to prepare a packaging material, the growth of various microorganisms such as bacteria and fungi can be effectively inhibited, the packaging material is endowed with strong antibacterial protection capability, and the composite antibacterial additive has a more lasting antibacterial effect so as to prolong the antibacterial validity period of the packaging material.

The invention relates to the technical field of inorganic nonmetal ceramic materials, in particular to a ceramic tile and a preparation method thereof. The ceramic tile comprises the following raw materials: 40-50 parts of waste residues, 1-5 parts of barium carbonate, 5-8 parts of feldspar powder, 0.5-3 parts of zinc oxide, 2-7 parts of pigment, 15-20 parts of modified kaolin and 1-5 parts of water. The preparation process of the modified kaolin comprises the following steps: (1) adding kaolin into deionized water, then adding octadecyl bis (hydroxyethyl) methyl ammonium chloride, stirring, filtering and drying to obtain pretreated kaolin; and (2) adding the kaolin pretreated in the step (1) into deionized water, then adding cellulose and manganous nitrate, carrying out heating reaction, and then filtering, washing and drying to obtain the modified kaolin. Cellulose is carbonized on the surface of kaolin through a hydrothermal carbonization reaction, the heat conduction efficiency of the ceramic tile is reduced, the hybridization degree of the surface structure of kaolin is further improved by adding manganous nitrate, and the strength of the ceramic tile is improved.

The invention provides a composite granular desulfurizer and a preparation method thereof. The desulfurizer comprises the following components: zinc oxide, calcium oxide, iron oxide, coke, activated carbon, modified attapulgite, a pore-enlarging agent and aluminum oxide. The preparation method comprises the following steps: uniformly mixing the components, feeding into a calcining furnace, roasting at 350-450 DEG C for 2-4 hours to obtain a calcined material, crushing, extruding and forming, and screening by using a vibrating screen to obtain the desulfurizing agent. The desulfurizer is prepared by loading calcium oxide with aluminum oxide, and ferric oxide is added to further catalyze the desulfurization reaction, so that the desulfurization reaction process is changed, and the desulfurization efficiency is improved. The pore-enlarging agent is used for pore-forming of desulfurizer particles, the adsorption performance of the active substance calcium oxide in the desulfurizer is improved, meanwhile, the mechanical performance of the desulfurizer particles is changed, the desulfurizer particles can be repeatedly used, and the regeneration performance of the desulfurizer is improved.

The invention discloses a negative temperature coefficient medium-entropy thermistor material as well as a preparation method and application thereof. According to the invention, manganese dioxide, nickel oxide, cobalt sesquioxide, zinc oxide and copper oxide are used as raw materials, and a solid-phase reaction method is adopted to prepare the negative temperature coefficient medium-entropy thermistor material with a chemical formula of (NiX1CoX2ZnX3CuX4) Mn2O4. Wherein the values of X1, X2, X3 and X4 are 0.075-0.425, and X1 + X2 + X3 + X4 = 1. The negative temperature coefficient medium-entropy thermistor material is of a single spinel structure. The material has the hysteresis diffusion effect of medium-entropy ceramic, and by combining the coordinated optimization effect of multiple components, the material constant and the resistivity of the thermal sensitive ceramic can be remarkably reduced, and the anti-aging performance can be improved.

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention belongs to the technical field of energy storage materials, and particularly relates to a high-entropy oxide Fe0. 2Co0. 2Ni0. 2Cu0. 2Zn0. 2O and an ultrafast synthesis method and application thereof. According to the preparation method, ferroferric oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide with equal molar ratio are adopted as direct synthesis raw materials, toxic gases such as chlorine and nitrogen dioxide generated in the synthesis process of a metal salt precursor are avoided, and the uniformly distributed single-phase high-entropy oxide is synthesized in an ultrafast manner within 10 seconds by using a Joule heating technology; the synthesized high-entropy oxide is used as a lithium ion battery negative electrode material, and shows more excellent electrochemical performance and cycling stability compared with other high-entropy oxides prepared from transition metals with different proportions; in the preparation process, extra additives are not needed, operation is easy, the synthesis speed is high, the yield is high, element distribution is uniform, and the method has the advantages of being low in cost, high in efficiency and free of pollution and has the industrialization prospect.

The invention relates to the technical field of building materials, in particular to premixed flow state solidified soil slurry with self-sensing performance and a preparation method of the premixed flow state solidified soil slurry. 200 to 220 parts of fine aggregate; 20-30 parts of industrial waste residue; 5-10 parts of an alkaline activator; 0.5 to 1.2 parts of modified epoxy resin; 70 to 90 parts of water; 1-3 parts of conductive fiber; 0.5-1 part of a water reducing agent; and 2-4 parts of an accelerator. Through the synergistic effect of the nano-zinc oxide modified epoxy resin, the conductive fibers and the industrial waste residues, perfect combination of self-sensing, high strength, high fluidity and high durability is achieved. Nano-zinc oxide is used as a seed crystal, so that ordered growth of C-S-H gel is promoted, interface bonding of epoxy resin and a cement matrix is improved, and a more compact and more stable microstructure is formed; in a long-term use process, the material shows certain self-repairing capability.

The invention discloses an enamel ceramic glaze tile with a metal spot bionic effect and a preparation method thereof, and relates to the technical field of ceramics. The enamel porcelain glaze tile comprises a bottom blank, a metal ground glaze layer and a semi-opaque cover glaze layer, the metal ground glaze layer is prepared from a first ground glaze formula or a second ground glaze formula, and the first ground glaze formula comprises, by mass, potassium feldspar, quartz, calcite, kaolin, talc, zinc oxide, ferric oxide and manganese dioxide; the formula of the second ground glaze comprises the following components in percentage by mass: potassium feldspar, quartz, calcite, kaolin, talc, zinc oxide, ferric oxide and chromic oxide; the semi-opaque surface glaze layer is prepared from the following raw materials in percentage by mass: albite, calcite, talc, burnt soil, zircon powder, oriental zirconium, calcined zinc oxide, black clay powder and calcined aluminum oxide. Through a double-layer glaze structure and a black mud powder glaze breaking mechanism, the stereoscopic visual effect that metal spots are randomly generated on an opacifying substrate is achieved, and meanwhile the Moh's hardness of the ceramic tile is improved.

The invention relates to the technical field of film material preparation, and discloses a polylactic acid antibacterial packaging film and a preparation method thereof, the polylactic acid antibacterial packaging film comprises the following raw material components by weight: 60-80 parts of polylactic acid, 10-20 parts of polyvinyl alcohol, 10-20 parts of nano zinc oxide, 0.5-1.5 parts of nano cellulose, 1-3 parts of an antibacterial agent, and 10-15 parts of corn starch; the antibacterial agent is prepared from the following components in parts by weight: 5-10 parts of carboxymethylated chitosan and 0.5-2 parts of a dynamic disulfide bond cross-linking agent, the substitution degree of the carboxymethylated chitosan is greater than or equal to 80%, the antibacterial agent is prepared from tea tree essential oil and eugenol, and the dynamic disulfide bond cross-linking agent is bis (3-aminopropyl) disulfide. By adopting a composite system of carboxymethylated chitosan and a dynamic disulfide bond cross-linking agent, the technical effects of humidity-triggered self-repairing and mechanical property synergistic improvement are achieved, and compared with a packaging film with a single polymer base material in the prior art, the problem of antibacterial failure caused by mechanical damage is solved.

The invention relates to the technical field of plastics, in particular to an antibacterial food packaging bag and a preparation method thereof.The antibacterial food packaging bag is prepared by blending polylactic acid and polypropylene carbonate as a base film raw material, selecting a food-grade ADR chain extender as a chain extender, selecting one of butyl titanate and a titanate coupling agent as a compatibilizer and selecting composite hybrid cellulose as a broad-spectrum antibacterial agent; carrying out extrusion granulation and blow molding to obtain a base film; the preparation method comprises the following steps: taking microcrystalline cellulose-nano zinc oxide hybrid particles as hybrid cellulose, performing epoxidation on the hybrid cellulose by using epoxy chloropropane, and then grafting an amino acid-based Schiff base antibacterial agent by using epoxy-hydroxyl reaction; composite hybrid cellulose and modified castor oil-based waterborne polyurethane are used for preparing a protective coating, the surface of a base membrane is coated with the protective coating, and a green, environment-friendly, durable, antibacterial, hydrophobic and antifouling self-repairing surface is constructed.

The invention provides ceramic polyolefin as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The ceramic polyolefin provided by the invention is prepared from the following raw materials in parts by mass: 40-60 parts of polyolefin resin which is a mixture of polyethylene and an ethylene-octylene copolymer; 40-60 parts of porcelainized powder, wherein the porcelainized powder is a mixture of silicon dioxide, boric oxide, zinc oxide and magnesium oxide; 20-40 parts of low-melting-point glass powder, wherein the melting point of the low-melting-point glass powder is 400-600 DEG C; 15 to 60 parts of silicate filler; and 0.1 to 3 parts of an antioxidant. The ceramic polyolefin provided by the invention has excellent tensile strength and elongation at break, and a ceramic shell is complete.

The invention relates to the technical field of packaging materials, and discloses an antibacterial functional food packaging film and a preparation method thereof.The packaging film is formed by taking low-density polyethylene as a main raw material, adding a compatilizer, a synergistic antibacterial agent, a fiber coating material and the like and carrying out blending, extrusion and film blowing processes. The synergistic antibacterial component is nano-zinc oxide with the surface grafted with biomass antibacterial agent tannic acid, after being immobilized on the surface of the nano-zinc oxide, the tannic acid cannot be easily volatilized and migrated, the broad-spectrum antibacterial performance of the tannic acid is continuously exerted, and the tannic acid and the photocatalytic antibacterial effect of the nano-zinc oxide are mutually cooperated, so that the synergistic antibacterial effect is achieved. Due to the addition of the fiber coating material, the density of the polyethylene film can be improved, and the air tightness and the high-temperature-resistant effect can be improved. In addition, the fiber coating material can exert stress load transfer and absorption effects, so that the prepared polyethylene film has excellent mechanical strength.

The invention relates to the technical field of power cables, and provides a medium-voltage fireproof cable, which comprises a conductor, and an insulating layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 1-3 parts of an antioxidant; the sheath layer comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 8-16 parts of a flame retardant, 1-2 parts of a plasticizer, 1-3 parts of an antioxidant and 5-10 parts of filler; the filler comprises silicon dioxide, inorganic fibers and tetrapod-like zinc oxide whiskers. According to the technical scheme, the problem that the strength and the aging resistance of the cable in the prior art are poor is solved.

The invention provides a supercritical rubber foaming material for soles, which is prepared from the following components in parts by mass: 50 to 95 parts of rubber, 5 to 50 parts of thermoplastic elastomer, 20 to 60 parts of white carbon black, 1 to 5 parts of flaky filler, 0.5 to 5 parts of active agent, 0.1 to 10 parts of coupling agent, 0.5 to 5 parts of softening agent, 2 to 5 parts of antioxidant, 3 to 5 parts of zinc oxide, 0.5 to 3 parts of stearic acid, 1 to 5 parts of accelerant, 0.5 to 3 parts of sulfur and 0.1 to 0.5 part of bridging agent. The sum of the mass parts of the rubber and the thermoplastic elastomer is 100. The preparation process of the rubber supercritical foaming material comprises preparation of a rubber compound and preparation of the rubber supercritical foaming material. According to the invention, the rubber and the thermoplastic elastomer matrix are used together to form a uniform dispersion system of the rubber / thermoplastic elastomer; the spherical white carbon black and the flaky filler are synergistically used to improve the filler-matrix interface effect, promote heterogeneous nucleation of supercritical gas, increase the cell density and endow the material with the performance characteristic of lighter weight. Through the combination of a material matrix, a formula system and a foaming method, the performance requirements of light weight, wear resistance and slip resistance of the sole rubber are met.

The invention relates to the technical field of adhesives, and discloses a weather-resistant transparent adhesive, a preparation method and application of the weather-resistant transparent adhesive to adhesion of a weather-resistant and wear-resistant transparent film and a color-coated sheet. The preparation method of the weather-resistant transparent adhesive comprises the following steps: reacting 4-(2, 3-ethylene oxide) benzaldehyde with tetrakis (3-mercaptopropionic acid) pentaerythritol ester to obtain an intermediate product A; reacting the intermediate product A with 4, 5-diaminobenzene-1, 2-diphenol to obtain an intermediate product B; preparing nano zinc oxide, performing surface modification on the nano zinc oxide, and grafting the intermediate product B to obtain an organic-inorganic hybrid curing agent; modifying epoxy resin by using the composite modifier to obtain modified epoxy resin; the modified epoxy resin, the organic-inorganic hybrid curing agent and the accelerant are mixed and stirred, and the weather-resistant transparent adhesive is obtained; the weather-resistant transparent adhesive disclosed by the invention is high in transparency and has excellent mechanical strength, toughness, adhesiveness and weather resistance.

The invention relates to the technical field of friction materials, and particularly discloses an electromagnetic brake friction material prepared from granules and a preparation process of the electromagnetic brake friction material in order to solve the problem that an existing electromagnetic brake friction plate is difficult to prepare or insufficient in performance. The reinforcing material comprises plasma modified aramid pulp, coupling modified composite mineral fibers, SiO2 coated tetrapod-like zinc oxide whiskers and carbon fiber-aluminum silicon whiskers; the filler comprises modified needle-like wollastonite and organic modified precipitated barium sulfate; the adhesive comprises boron-silicon synergistic modified phenolic resin and modified carboxy nitrile rubber. The raw materials are improved, and granules are prepared by adopting a mixing and crushing process, so that the content of an adhesive can be greatly reduced, meanwhile, the die filling efficiency can be improved, the die thickness and the high-temperature heat fading of the friction material can be reduced, a cold press molding process can be omitted, and the qualification rate of finished friction materials can be improved.

The invention provides an electrochemical device and an electronic device, the electrochemical device comprises a positive pole piece, the positive pole piece comprises a positive current collector, a first coating and a positive material layer, the first coating is arranged on the surface of the positive current collector, and the positive material layer is arranged on the surface, away from the positive current collector, of the first coating; the first coating comprises inorganic particles, and the inorganic particles comprise at least one of nano boehmite, aluminum oxide, titanium dioxide, magnesium oxide, zirconium oxide or zinc oxide; the positive electrode material layer comprises a first conductive agent, and the first conductive agent comprises a first carbon nanotube; the length of the first carbon nanotube is 2-5 [mu] m, and the diameter of the first carbon nanotube is 2-100 nm; and the ion transference number of the positive electrode material layer is 0.4-0.47. The electrochemical device provided by the invention can consider the nail penetrating safety performance, the low-temperature cycle performance and the quick charging performance.

The invention relates to the field of functional fabrics, and provides a flame-retardant fabric with infrared shielding performance and a preparation method thereof, and the fabric is prepared from blended yarns of polyester composite fibers and surface modified polyimide composite fibers through a textile process. The polyester composite fiber comprises magnesium hydroxide / zinc oxide composite filler and is prepared through melt blending and spinning, and the surface modified polyimide composite fiber is obtained through basic zinc carbonate surface modification treatment. Zinc oxide particles and magnesium hydroxide nanowires in the magnesium hydroxide / zinc oxide composite filler have a synergistic effect, so that the flame retardance and the infrared shielding capability of the fiber are enhanced; the use of the surface modified graphene improves the mechanical and thermal stability of the polyimide fiber. By reasonably regulating and controlling the fiber proportion and weaving density, the fabric has excellent mechanical property, infrared shielding property and flame retardant property while ensuring the flexibility, and has wide application value.