23results about How to "Improve oxidation resistance" patented technology

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The invention relates to perovskite quantum dot glass powder and a preparation method thereof, the chemical formula of the glass powder is CsPb (Ax B1-x) 3, A and B are one or more of Cl, Br or I, x is more than or equal to 0 and less than or equal to 1, and the total molar amount of the components is 100 mol%. According to the perovskite quantum dot glass powder, the fluorescence wavelength can be adjusted through component change, the preparation method is simple and low in toxicity, and the perovskite quantum dot glass powder has high stability and does not need an annealing process. The method can be widely applied to the fields of display devices, lighting equipment, photovoltaic devices, photoelectric sensors and the like.

The invention provides an electrolyte and a secondary battery, the electrolyte comprises a solvent, an additive and an electrolyte, the solvent comprises fluoroethylene carbonate, a compound as shown in a formula I and a compound as shown in a formula II, the mass ratio of fluoroethylene carbonate to fluorochain ester is 1: (0.33-4), the mass ratio of the compound as shown in the formula I to the compound as shown in the formula II is 1: (0.33-3), and the additive and the electrolyte are used for preparing the electrolyte. Based on the mass of the electrolyte, the mass percentage A of the fluorinated solvent is more than or equal to 20% and less than or equal to 80%; the additive comprises tetraethylene silane, based on the mass of the electrolyte, the mass percentage of the tetraethylene silane is M, and M is larger than or equal to 0.02% and smaller than or equal to 3%. Through the arrangement, the fluoroethylene carbonate, the compound as shown in the formula I, the compound as shown in the formula II and the tetraethylene silane have a synergistic effect, so that the electrolyte has proper viscosity and relatively high oxidation resistance, and meanwhile, the negative influence of defluorination on a positive electrode can be improved; therefore, the high-temperature cycle performance and the high-temperature storage performance of the secondary battery under the high-pressure condition are improved.

The invention relates to the technical field of PE pipes, in particular to an anti-aging high-toughness PE pipe and a preparation method thereof.The anti-aging high-toughness PE pipe is prepared from, by weight, 40-60 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 8-15 parts of an additive, 5-10 parts of a functional additive, 0.5-1.2 parts of calcium stearate and 0.3-0.8 part of a composite antioxidant B900. The functional additive is prepared by mixing tannic acid, nano silicon dioxide, neutral protease and horse radish peroxidase for reaction under an acidic condition and carrying out heating curing, centrifugal separation, drying and crushing processes, so that the problem that a common PE pipe is easy to age and embrittle in an outdoor environment is solved, the service life of the pipe is prolonged, and the service life of the pipe is prolonged. Active groups generated by enzymatic reaction in the functional auxiliary agent enhance the interfacial compatibility of the filler and a polyethylene matrix, so that long-term stable use of the filler in a complex environment is guaranteed.

The utility model provides a multi-level heat preservation electronic wire harness, which belongs to the technical field of electronic wire harnesses and comprises a wire harness body and connectors, the left end and the right end of the wire harness body are electrically connected with the connectors, the wire harness body comprises a core wire, a heat preservation layer, an anti-freezing layer, a heat insulation layer and an insulation layer, the core wire is located on the innermost side of the wire harness body, and the heat preservation layer is wrapped on the core wire. The outer side surface of the heat preservation layer is coated with an anti-freezing layer. According to the utility model, the insulating layer is arranged, the insulating layer is made of the fluorosilicone rubber material, the fluorosilicone rubber has a wider temperature-resistant range, can be usually used in a temperature range of-50 DEG C to 250 DEG C, and has excellent heat resistance and oxidation resistance, and the electrical insulation property of the fluorosilicone rubber is equivalent to that of silicone rubber, so that the insulating property of the fluorosilicone rubber is ensured; however, due to the enhanced chemical corrosion resistance, the fluorosilicone rubber is possibly more suitable for use in some special environments, and the fluorosilicone rubber cannot be hardened at low temperature, so that the flexibility of the wire harness body 1 is ensured, and the service life of the wire harness body is ensured.

This invention discloses a method for preparing rare earth metals by electrolytic oxides using a fluoride system, belonging to the field of rare earth metal preparation technology. This invention modifies graphite anodes used in rare earth molten salt electrolysis. It improves oxidation and corrosion resistance, reduces anode wear, lowers replacement frequency, and increases production efficiency, yielding high-purity, low-carbon rare earth metal lanthanum. A three-dimensional network framework material is constructed using Prussian blue self-assembly and SiC is deposited to obtain a composite framework material. During pre-calcination with graphite and other materials, the derivatives optimize the crystal structure and interfacial bonding, enhancing the strength of the pre-shaped anode material and ensuring the integrity and performance stability of the electrode structure. Thirdly, the pre-shaped anode material is impregnated with a specific impregnation solution, altering the gas diffusion path and resistance, inhibiting oxidation reactions, and high-temperature sintering generates substances that fill the pores, forming a dense microstructure. Simultaneously, the compounds formed by phosphoric acid enhance cohesion and adhesion, improving oxidation and molten salt corrosion resistance, and extending the service life of the graphite anode.

The application discloses an electrolyte and a battery. The electrolyte comprises an electrolyte, a solvent, a first additive and a second additive. The first additive is selected from at least one of structural formula (1) to structural formula (4), and the second additive is selected from at least one of structural formula (5) to structural formula (7). The first additive has high oxidation resistance, and contains an unsaturated double bond which can be polymerized to form an SEI protective film on a negative electrode. The protective film inhibits the volume expansion of the silicon negative electrode. The second additive can form a polymer film on the surface of a positive electrode under high voltage, which can improve the oxidation resistance of the electrolyte. Through the joint action of the first additive and the second additive, a stable film layer is formed on the surface of the electrode, the volume expansion of the electrode is inhibited, the interface on the surface of the electrode is prevented from being damaged by expansion stress, the contact between the electrolyte and the electrode material is blocked, the oxidation resistance of the electrolyte is improved, the performance stability of the battery under high voltage is improved, and the high-temperature storage and cycle performance of the battery are improved.

This invention discloses a method and system for preventing oxidation of recycled copper rods, relating to the field of non-ferrous metal surface protection. The method includes material preparation, pretreatment, preparation of an anti-oxidation solution, dip coating, drying and curing, and packaging. This invention offers excellent anti-oxidation performance: the anti-oxidation film is dense and uniform, effectively isolating oxygen and moisture from contact with the copper surface. Recycled copper rods stored in a natural environment show no significant oxidation after more than 6 months, with an anti-oxidation efficiency ≥98%, far superior to traditional methods. The film exhibits strong adhesion: the silane coupling agent forms a chemical bond with the copper surface, and combined with the curing treatment, the film adhesion is ≥5N / cm, making it difficult to peel off and able to withstand minor friction during storage and transportation.

This utility model discloses a flat, fire-resistant, silicone rubber flame-retardant cable, relating to the field of cable technology. It includes a cable core composed of multiple sets of parallel-distributed wire cores, each core comprising a conductor, an insulation layer, and a shielding layer. A fire-resistant layer, a flame-retardant layer, and an outer sheath are sequentially disposed outside the cable core. The fire-resistant layer consists of a hardened inner layer and a high-temperature resistant outer layer. The hardened inner layer is a ceramicized silicone rubber layer, and the high-temperature resistant outer layer is a mica tape wrapping layer. The flame-retardant layer consists of a buffer layer and a flame-retardant outer coating layer. The buffer layer is aluminum hydroxide-filled silicone rubber, and the flame-retardant outer coating is an intumescent flame-retardant coating. This solution solves the problems of unstable cable operation in high-temperature environments and performance degradation in complex environments.

The invention belongs to the technical field of oil paints, and discloses an anti-aging and anti-cracking water-based oil paint, which is prepared from the following components in parts by mass: 15 to 30 parts of pigment, 15 to 25 parts of modified linseed oil, 30 to 55 parts of acrylic resin emulsion, 0.5 to 1 part of PH regulator, 0.5 to 1.5 parts of thickening agent, 1 to 3 parts of nano filler, 0.2 to 0.6 part of anti-aging agent, 0.1 to 0.3 part of preservative and 10 to 20 parts of water. The modified linseed oil is formed by carrying out graft modification on linseed oil and an acrylate monomer; the acrylic resin emulsion is a specific monomer copolymer. Through the synergistic compatibility of the acrylate modified linseed oil and the acrylic resin emulsion, and in combination with the nano filler and the composite anti-aging agent system, the pigment film has good flexibility, uniform film-forming property and structural stability under a thick coating condition, meanwhile, the oxidation resistance and yellowing resistance are improved, and the generation of cracks is effectively inhibited. The oil paint has both aging resistance and cracking resistance.

The utility model relates to the technical field of electronic tags, and solves the problems that different from unidirectional spring clamping in the prior art, a bidirectional screw drives symmetrically distributed clamping assemblies, the distance between L-shaped clamping blocks at two sides can be synchronously adjusted, the application range of a fixed size is obviously improved, and the positioning effect of the electronic tag is influenced. The supermarket goods electronic price tag fixing device comprises a clamping frame, a clamping groove is formed in the front face of the clamping frame, an electronic price tag display module is magnetically connected into the clamping groove, a sliding groove is formed in the back face of the clamping frame, a sliding groove block is fixedly connected to the middle of the back face of the clamping frame, and clamping assemblies are slidably connected to the two sides of the interior of the sliding groove block. The clamping assembly comprises a sliding block slidably connected to the inner wall of the sliding groove block, a threaded penetrating groove is formed in the middle of the top face of the sliding block, one side of the sliding block is fixedly connected with an L-shaped clamping block, and the two sides of the sliding block are slidably connected to the inner wall of the sliding groove.

The invention provides neodymium-containing high-corrosion-resistance laser cladding powder for a mining hydraulic oil cylinder and a cladding method, the neodymium-containing high-corrosion-resistance laser cladding powder comprises Nd2O3 powder and alloy powder, the mass percent of the Nd2O3 powder is 0.4%-1.0%, and the balance is the alloy powder; the alloy powder comprises the following components in percentage by mass: 19.2%-20.8% of Cr, 4.0%-8.0% of Ni, 0.3%-0.75% of Mn, 4.5%-8.5% of Mo, 0.04%-0.08% of C, 1.35%-1.52% of Si and the balance of Fe. In an inert atmosphere, the neodymium-containing high-corrosion-resistance laser cladding powder for the mining hydraulic oil cylinder is used for carrying out laser cladding on the outer surface of the mining hydraulic oil cylinder. The cladding method also has the advantages of moderate hardness, good wear resistance, strong purification capability and low hot crack sensitivity on the premise of ensuring that the cladding layer has better corrosion resistance.

The utility model discloses a fixed thickness wheel, which relates to the fixed thickness wheel field, and comprises an inner wheel rim, the outer wall of the inner wheel rim is fixedly connected with an outer wheel rim, the inner wheel rim is provided with a plurality of threaded holes in a penetrating way, the plurality of threaded holes are distributed at equal intervals, the outer wall of the outer wheel rim is fixedly connected with a plurality of groups of convex blocks which are distributed at equal intervals, and the convex blocks are fixedly connected with the outer wheel rim. A through opening is formed in the inner wheel rim in a penetrating mode, the inner wheel rim and the outer wheel rim are made of the same materials, and the inner wheel rim and the outer wheel rim are made of decorative layers, protective layers, corrosion-resistant layers, wear-resistant layers, insulating layers, damping layers and base layers from outside to inside in sequence. Through the arrangement of the decorative layer, the protective layer, the corrosion-resistant layer, the wear-resistant layer, the insulating layer, the damping layer and the base layer, the oxidation resistance, the corrosion resistance and the wear resistance of the fixed thickness wheel can be enhanced, and the service life of the fixed thickness wheel is prolonged.

This invention discloses a process for manufacturing an impact-resistant and wear-resistant ultra-hard metal-based composite layer and a straightening roller, comprising an alloy groove coating layer one, an alloy groove coating layer two, and an alloy working layer; both alloy groove coating layer one and alloy groove coating layer two have sinusoidal structures, are staggered, and have at least one set of intersection nodes between them, and are located inside the alloy working layer. By introducing V and Nb into the original formulation and precisely adjusting the proportions of components such as Co, Ni, Cr, C, B, and Si to meet the requirements, the composite layer retains high hardness and good oxidation resistance, impact resistance, thermal shock resistance, and corrosion resistance at high temperatures, improving the spraying process performance of the alloy coating and increasing the deposition rate.

The application provides a filtering device for water treatment, and belongs to the technical field of water treatment. The filtering device comprises a water inlet unit, an external reaction unit (5), a PVDF hollow fiber ultrafiltration membrane filtering unit (4), an ozone preparation and regulation unit, a transmembrane pressure difference detection and recording unit and a water production storage unit. The external reaction unit (5) is arranged between the water inlet unit and the PVDF hollow fiber ultrafiltration membrane filtering unit (4), and the ozone preparation and regulation unit is connected with the PVDF hollow fiber ultrafiltration membrane filtering unit (4). The filtering device of the application realizes the coupling of the membrane shell filtering unit and the in-situ ozone technology on the basis of combining the advantages of the membrane shell filtering unit and the PVDF hollow fiber ultrafiltration membrane, and effectively solves the problem of serious membrane pollution of the membrane shell filtering unit.

The application provides an amide-containing polyurethane elastomer and a preparation method and application thereof, and belongs to the field of high polymer materials. The application first provides an amide-containing chain extender, which is prepared from a diamine compound and a compound shown in formula I, a salt or a stereoisomer thereof. Then, the polyurethane elastomer is prepared by using the chain extender, and the polyurethane elastomer has excellent mechanical properties, and the water resistance, solvent resistance and oxidation resistance are significantly improved. In addition, the polyurethane elastomer is prepared by using a solvent-free preparation process, so that the use of organic solvents is avoided, the production environmental protection is improved, and the solvent recovery cost is reduced. Furthermore, the production process is simple, can be applied to large-scale industrial production, has high economic benefits and market competitiveness, and has a good application prospect.

The application provides a three-layer structure hollow fiber ultra-microfiltration PVDF composite membrane and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing a PVDF resin spinning solution; S2, preparing a second resin spinning solution, and the film-forming resin is at least one of polyvinyl chloride and polyvinyl butyral; S3, using a fiber braided tube as a lining, and sequentially attaching the second resin spinning solution and the PVDF resin spinning solution on the fiber braided tube through a spinning process; and S4, performing a phase inversion reaction in a coagulation bath to make the resin gel solidify into a film, so as to obtain the three-layer structure hollow fiber ultra-microfiltration PVDF composite membrane. The composite membrane uses the fiber braided tube as the lining, and the outer layer resin is the PVDF resin, so that the rejection rate is high, the toughness and oxidation resistance are good, the inner layer resin is other non-PVDF resin with low price, and the large-pore structure is beneficial to the rapid passing of small molecules and good mechanical properties.

This invention discloses an anti-oxidation and wear-resistant composite coating for an alloy roller surface and its manufacturing process, comprising an alloy groove coating layer one, an alloy groove coating layer two, and an alloy working layer. Both alloy groove coating layer one and alloy groove coating layer two have sinusoidal structures, circumferentially staggered on the alloy roller surface. At least one set of intersection nodes is formed between adjacent alloy groove coating layers one and two, and anchoring nodes are provided at the intersection nodes. Alloy groove coating layers one and two are located inside the alloy working layer. This invention improves the interlayer bonding strength and reduces the thickness by improving the structure, materials, and process, while also enhancing impact resistance, thermal shock resistance, and corrosion resistance to a certain extent, and maintaining high hardness at high temperatures.

The application belongs to the technical field of paint, and particularly relates to a fluorine-free wear-resistant organic silicon paint, a preparation method and application thereof, wherein the fluorine-free wear-resistant organic silicon paint is composed of the following components in mass fraction: 25-35 parts of vinyl polysiloxane, 2-10 parts of hydrogen-containing crosslinking agent, 1-8 parts of organic silicon wear-resistant and slip powder, 2-5 parts of silane coupling agent, 3-9 parts of matt powder, 1-2 parts of dispersing agent, 40-60 parts of organic solvent, 1-3 parts of tackifier, 0.3-1.5 parts of inhibitor and 1-8 parts of metal catalyst. Compared with the prior art, the fluorine-free wear-resistant organic silicon paint provided by the application can meet the requirements of PFAS and anti-allergy when applied to an elastomer substrate, and the combination and dispersion uniformity of the organic silicon wear-resistant and slip powder and the vinyl polysiloxane after kneading treatment of the silane coupling agent are higher, so that the fluorine-free wear-resistant organic silicon paint has sufficient wear resistance and delicate slipperiness.

This invention belongs to the technical field of sealant adhesive materials, specifically relating to a weather-resistant modified silane sealant and its preparation method. The preparation method of the weather-resistant modified silane sealant of this invention includes the following steps: S1, polypropylene glycol is sequentially subjected to alkoxide treatment and allylation treatment to obtain a polyether containing double bonds; the polyether containing double bonds and mercaptopropyltrimethoxysilane are used as raw materials for end-capping modification to obtain a silane-modified polyether material; S2, the silane-modified polyether material, filler, and plasticizer are mixed and vacuum stirred to obtain a mixture; S3, after cooling, a silane coupling agent, vinyltrimethoxysilane, catalyst, ultraviolet absorber, light stabilizer, and antioxidant are added to the mixture and stirred; the mixture is then discharged and sealed to obtain the weather-resistant modified silane sealant. This invention effectively improves the tensile strength of the material while ensuring good weather resistance of the sealant.

The utility model relates to the technical field of superhard composite materials, and discloses an anti-oxidation diamond compact which comprises a diamond layer, first inclined planes are arranged on the upper end face of the diamond layer close to the front end and the rear end, and discharging grooves are formed in the middle point and the two sides of the plane of the upper end face of the diamond layer. Second inclined faces are arranged on the edges of the two sides of the diamond layer, an embedded block is fixedly arranged on the lower end face of the diamond layer, a hard alloy base body is arranged at the position, close to the lower end, of the diamond layer, and a convex face is arranged on the upper end face of the hard alloy base body in a protruding mode. According to the diamond composite sheet, materials contained in the hard alloy base body fired at the lower end of the diamond layer can enhance the bonding strength of the composite sheet and improve the oxidation resistance of the composite sheet, and meanwhile the first inclined face and the second inclined face arranged on the upper end face of the diamond layer can improve the impact resistance, the softness and the strength of the diamond layer. And the formed discharging groove can be used for discharging chippings.

One aspect of the present invention has a crystal structure, and contains at least one element A selected from the group consisting of lithium element, sodium element, and potassium element, phosphorus element, at least one element M selected from the group consisting of aluminum element and boron element, nitrogen element, and at least one halogen element, the molar ratio (A / P) of the content of the element A to the content of the element phosphorus is less than 3.74, and the molar ratio (N / P) of the content of the element nitrogen to the content of the element phosphorus is less than 0.33.