15results about How to "Reduce interfacial energy" patented technology

The invention relates to an oiling agent for chemical fiber spinning and a preparation method and application of the oiling agent. The oiling agent comprises novel oligomeric potassium alkyl sulfate, a nonionic surfactant, an emulsifier, solvent oil and water. The emulsion formed by dissolving the novel oligomeric alkyl sulfate potassium salt oil agent in water has excellent stability, and does not have obvious phase separation phenomena such as sinking and floating after standing at room temperature for 56h. When the oiling agent for chemical fiber spinning disclosed by the invention is applied to the field of chemical fiber production, chemical fibers can be endowed with excellent antistatic property and smoothness, so that the spinnability of the chemical fibers is better; and the oiling agent belongs to a green phosphorus-free formula, so that the spinnability index of chemical fibers is guaranteed, and the pollution of discharged water to the environment is reduced.

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

The application relates to the technical field of materials for generators, and provides a preparation method of an elastic material for a wind turbine generator set slip ring support, which comprises the following steps: after amino-terminated polydimethylsiloxane is dissolved in an organic solvent, diisocyanate is slowly added dropwise, a disulfide bond chain extender is added after reaction, and the temperature is increased to continue the reaction, so that amino-terminated polydimethylsiloxane elastomers containing dynamic disulfide bonds are obtained; after the elastomers prepared above are dissolved in an organic solvent, 4,4'-diamino diphenyl disulfide and trimellitic anhydride are added, and PDMS prepolymers are obtained after reaction; after polyimide monomers are dissolved in an organic solvent, the monomers are added into the PDMS prepolymers prepared above in batches, and then the temperature is increased in stages to react for a period of time, and the temperature is cooled to room temperature, so that the elastic material is obtained; the elastic material can still maintain sufficient toughness and anti-vibration capacity in a low-temperature environment, the risk of breakage is reduced, and the operation reliability of the wind turbine generator set in a severe cold region is improved.

The invention relates to the technical field of cells, in particular to a solar cell and a preparation method thereof, and the preparation method comprises the following steps: adding a hole transport material and a first perovskite material into a solvent to prepare a mixed solution; coating a substrate with the mixed solution, and performing annealing treatment to obtain a composite hole transport layer; coating the composite hole transport layer with a perovskite precursor solution, and performing annealing treatment to obtain a perovskite layer; the perovskite precursor solution comprises a second perovskite material, and the second perovskite material is the same as the first perovskite material. According to the preparation method of the solar cell provided by the invention, the perovskite seed crystal with the same components as the perovskite layer is pre-buried in the composite hole transport layer, and the perovskite seed crystal is used as a nucleation site to induce the perovskite layer to crystallize from bottom to top, so that the generation of bottom holes is inhibited.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The invention relates to an aluminum alloy soldering lug and a preparation method and application thereof, and belongs to the technical field of welding. The aluminum alloy soldering lug disclosed by the invention is prepared from the following elements in percentage by mass: 3.0 percent to 4.5 percent of Si, 2.0 percent to 3.5 percent of Fe, 0.8 percent to 1.2 percent of Mg, 0.10 percent to 0.25 percent of Zr, 0.05 percent to 0.15 percent of Sc, 0.02 percent to 0.08 percent of Er, 0.05 percent to 0.12 percent of Ti, 0.005 percent to 0.02 percent of B and the balance of Al and other inevitable impurities. The mass ratio of (Zr + Sc) / Fe is 0.08 to 0.15; the mass ratio of Mg to Si is 0.25 to 0.35; the mass ratio of (Fe + Si) to (Zr + Sc + Er) is 20-25; the problems that laser welding aluminum alloy is thick in weld joint structure and uneven in performance, and a dissimilar material welding interface is embrittled are fundamentally solved.

The invention relates to the technical field of rubber modification, in particular to a fluororubber-ethylene propylene diene monomer compatilizer and application. Silica (DMSN) with a dendritic mesoporous structure is synthesized and can be physically located at a two-phase interface, the effects of anchoring and reinforcing the phase interface are achieved, the size of a phase region is prevented from being too large, and therefore the compatibility is preliminarily improved. PFTS is further used for carrying out surface grafting modification on DMSN, PFTS is grafted to the surface of silicon dioxide through Si-O-Si, the compatibility of a perfluoro long chain at the other end and an FKM phase is good, and the interface bonding force between the filler and a rubber matrix is remarkably enhanced. The finally obtained composite material not only has the inherent high temperature resistance, oil resistance and chemical resistance of FKM, but also improves the low temperature resistance due to the introduction of EPDM, and greatly enhances the mechanical strength and toughness due to the enhancement of PFTS-DMSN.

The application discloses a kind of photovoltaic welding band and preparation method thereof, belong to photovoltaic material technical field.The method includes: in-situ chemical reduction preparation silver coating five silver nanometer reinforcing agent, silver nanoparticle uniform load forms core-shell structure;Ultrasonic-assisted smelting Sn-Bi-Ag-Cu quaternary solder master alloy;Copper band microetching forms Ra0.35-0.55 μm porous structure;Silane bridging hot-dip plating, control solder layer thickness 18-22 μm, staged cooling.Compared with prior art, the welding band tensile strength of the application is improved, the solder joint shear force is improved, the wet heat aging retention rate is in high position, the interface hole rate is reduced, the reliability and welding performance are significantly improved, and is suitable for high-efficiency photovoltaic module.

The present application relates to a lightweight piston and a preparation method, comprising the following steps: S1 vacuum smelting: an aluminum-based alloy is placed in a vacuum induction smelting furnace, a vacuum degree is less than or equal to 10 ‑2 Pa, a smelting temperature is 730-770 DEG C, and a smelting time is 30-60 minutes; the present application uniformly disperses nanocrystals and modified graphene in a melt through process scale, pulse ultrasonic and ultrasonic-electromagnetic synergistic treatment, avoids the agglomeration problem of traditional external particles, reduces the interface energy of the seed and the aluminum matrix at the atomic scale through the doping of carbon and boron, provides dispersion strengthening and heterogeneous nucleation at the nanometer scale through titanium diboride and titanium carbide seeds, provides interface optimization and high-temperature pinning through a molybdenum tungsten shell layer, provides self-lubrication and heat conduction channels at the submicron scale through modified graphene, provides skeleton reinforcement at the micron scale through a three-dimensional network structure, and provides plasticity through a refined aluminum matrix.

The application discloses an aluminum-magnesium-silicon alloy matrix carbon nanotube reinforced composite and a hot extrusion preparation method thereof, and belongs to the field of metal matrix composite manufacturing. The method aims to solve the problems of reinforcement phase agglomeration, interface reaction to generate brittle Al4C3 phase and unstable forming quality. The steps include: acidizing and ultrasonic dispersion pretreatment of multi-walled carbon nanotubes; mixing the dispersion liquid with aluminum-magnesium-silicon alloy powder and performing high-energy ball milling to form a core-shell structure composite powder; cold pressing to form a preform; hot extrusion forming under the conditions of a temperature of 400 to 500 DEG C, an extrusion ratio of 10:1 to 25:1, a speed of 1 to 10 mm / s and online quenching, followed by solid solution aging heat treatment. The application realizes uniform dispersion distribution of carbon nanotubes through chemical and physical cooperative pretreatment and mechanical ball milling, effectively inhibits the generation of interface brittle Al4C3 phase by using a low-temperature large deformation process, and significantly improves the interface bonding quality and matrix density. The prepared composite has a hardness of 150 HV or more, and excellent mechanical properties and wear resistance.

The application belongs to the technical field of polymer materials, and particularly relates to a high-strength and high-toughness polyamide composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 80-100 parts of long-chain semi-aromatic polyamide, 20-30 parts of oxidized carbon fiber, 10-20 parts of toughening agent, 5-10 parts of ethylene-acrylic acid ionomer, 1-3 parts of pentaerythritol-based polyol, and 1-6 parts of processing aid. The application adds a certain amount of ethylene-acrylic acid ionomer and pentaerythritol-based polyol in a long-chain semi-aromatic polyamide-oxidized carbon fiber reinforced system. During the melt blending process, the two modifiers of ethylene-acrylic acid ionomer and pentaerythritol-based polyol form an active layer rich in polar functional groups on the surface of the oxidized carbon fiber, improve the interfacial interaction between the polyamide and the filler, and solve the problem that the strength and toughness of the polyamide composite material in the prior art are difficult to be considered simultaneously.

The application relates to high-sphericity nano tetragonal barium titanate for MLCCs and a preparation method thereof. The technical scheme is as follows: a titanium source, a dissolving agent and potassium perchlorate are mixed to obtain mixed material A; the mixed material A is heated twice under air condition, is preserved, is naturally cooled to obtain a reaction product; the reaction product is washed with distilled water I, is separated, is dried to obtain titanium dioxide powder; the titanium dioxide powder and barium oxide are mixed to obtain mixed material B; the mixed material B, ethylene glycol, pure water and an anionic surfactant are mixed to obtain a mixed solution; the mixed solution is moved to a polytetrafluoroethylene reaction kettle, is placed in a microwave heating furnace, is heated, is preserved, is naturally cooled and is filtered; the filtered product is washed with distilled water II, is separated, is dried to obtain high-sphericity nano tetragonal barium titanate for MLCCs. The product prepared by the application has high purity, high sphericity, small particle size, good dispersity and high tetragonality.

The application belongs to the technical field of high-temperature-resistant aluminum alloy, and discloses a high-temperature-resistant aluminum alloy, a preparation method and application thereof. The high-temperature-resistant aluminum alloy contains Mg with a weight ratio of 0.03% to 0.08%, Sc with a weight ratio of 0.15% to 0.25%, Zr with a weight ratio of 0.10% to 0.20%, 8% to 9% of composite rare earth Ce+La, Fe and Cu as impurities with a content of less than 0.01%, and the rest is Al. The high-temperature-resistant aluminum alloy contains a main strengthening system of Al3(Sc,Zr) nano composite phase and Ce-La multi-element rare earth phase, a simplified component system, only a small amount of Mg, Sc, Zr and composite rare earth, strictly limited Fe, Cu and elements with a content of less than 0.01%, excellent high-temperature-resistant performance and excellent toughness.

This invention provides a method for enhancing radiative heat transfer on the surface of chromium-molybdenum steel and a radiation-enhanced chromium-molybdenum steel metal component, comprising the following steps: Step 1 is to pretreat the chromium-molybdenum steel substrate and then clad a nickel-aluminum alloy onto the surface of the pretreated chromium-molybdenum steel substrate to form a nickel-aluminum transition layer; Step 2 is to coat the surface of the nickel-aluminum transition layer with a nickel-aluminum rare earth material to form a nickel-aluminum rare earth composite layer; Step 3 is to coat the surface of the nickel-aluminum rare earth composite layer with a rare earth radiating material to form a rare earth infrared radiating layer; Step 4 is to cure the product obtained in Step 3. The radiation-enhanced chromium-molybdenum steel metal component of this invention achieves a smooth transition of thermal expansion coefficients through a gradient multilayer structure. The linear expansion coefficient of the nickel-aluminum transition layer is between that of the chromium-molybdenum steel substrate and the rare earth radiating layer, and it can absorb some thermal stress through its own plastic deformation, significantly alleviating the coating cracking and peeling phenomena caused by differences in thermal expansion.

The invention belongs to the technical field of preparation of lithium-based compounds, and particularly relates to a preparation method of nano lithium sulfide suitable for a sulfide electrolyte system, which comprises the following steps: carrying out ball milling on lithium sulfide to be refined by adopting a small-diameter zirconium oxide ball and medium-speed ball milling mode, and carrying out interface modification on the lithium sulfide subjected to ball milling by adopting a surface modifier to obtain the nano lithium sulfide. The surface modifier is adsorbed on the surface of lithium sulfide to reduce interface energy, reagglomeration of refined particles is inhibited, and a uniformly dispersed suspension is prepared. And removing the dispersing agent in the suspension through spray drying or vacuum freeze drying to obtain refined lithium sulfide. The preparation method for realizing the particle size reduction of the lithium sulfide by optimizing a ball milling process and regulating and controlling an auxiliary agent is suitable for efficient synthesis of sulfide solid electrolyte, efficient refining (D50lt, 300nm) of Li2S particles is realized, and the reaction efficiency of the Li2S particles and P2S5 is improved.