22results about How to "Reduce surface activity" patented technology

The present invention discloses a method for producing super-grade anhydrite by decomposing calcium chloride and producing hydrochloric acid as a byproduct. The method comprises heating a calcium chloride solution to above 102°C, adding concentrated sulfuric acid for stirring reaction, obtaining a reaction solution containing calcium sulfate precipitation and hydrogen chloride gas; the reaction solution containing calcium sulfate precipitation is subjected to solid-liquid separation to obtain an anhydrous calcium sulfate product and a filtrate containing calcium chloride; the hydrogen chloride gas is absorbed by water to obtain hydrochloric acid. The anhydrous calcium sulfate obtained by the method has high grade and good quality, meets the quality standard of super-grade anhydrite specified in GB / T 5483‑2008, and has a complete crystal structure, no cracks, low surface activity, and is suitable for use as a filler in industries such as plastics, rubber, paint, textiles, and papermaking. The method is simple, easy to operate, and has low production cost, and is suitable for large-scale industrial production of super-grade anhydrite.

The utility model discloses a cobalt hydroxide washing device which comprises a pressure filter tank, a pressing mechanism and a discharging mechanism, and a first filter screen, a partition plate and a second filter screen are sequentially and detachably connected in the pressure filter tank from one side to the other side at intervals. The pressure filter tank is internally divided into a first pressure filter sub-tank, a first filter tank, a second pressure filter sub-tank and a second filter tank in sequence from one side to the other side, and a first feed valve, a first drain valve and a second drain valve which are correspondingly communicated with the first pressure filter sub-tank, the first filter tank and the second filter tank are arranged outside the pressure filter tank; the first filter pressing sub-pool and the second filter pressing sub-pool are correspondingly provided with a material pressing mechanism for pressing materials and a material unloading mechanism for unloading the materials, and the aperture of the first filter screen is larger than that of the second filter screen. According to the cobalt hydroxide washing device, the cobalt hydroxide material does not need to be subjected to filter pressing and pulping for many times, the water consumption is low, the loss amount of the cobalt hydroxide material is small, and the washing effect is good.

This invention discloses a high specific surface area mesoporous tin oxide powder and its preparation method. The method includes: dissolving a tin source in a mixed solvent of alcohol and deionized water, adding a ketone complexing agent and a nonionic dispersant, and stirring to form a tin-based complex precursor solution; then transferring the solution to a hydrothermal reactor for hydrothermal aging treatment, causing the precursor solution to hydrolyze and condense, forming gel particles in situ; after solid-liquid separation, washing with alternating anhydrous ethanol and dilute ammonia water, and drying to obtain the precursor powder; finally, performing staged heating calcination under an air-nitrogen mixed atmosphere, first removing organic components at low temperature, and then completing the crystal phase transformation at high temperature to obtain rutile phase SnO2 powder. The powder has an average particle size of 8–15 nm and a specific surface area of ​​85–110 m² / g. 2 The powder has a pergola size of 3–6 nm and good dispersibility. This invention effectively suppresses grain agglomeration through complexation regulation, hydrothermal-sol-gel coupling, and gradient atmosphere calcination. The prepared powder is suitable for applications such as gas sensors, lithium-ion battery anodes, or transparent conductive films.

The invention relates to a perovskite photovoltaic cell and a preparation method thereof, the perovskite photovoltaic cell sequentially comprises a composite substrate, a transparent electrode layer, a hole transport layer, a barrier protection layer, a perovskite light absorption layer, a passivation layer, an electron transport layer and a top electrode layer, the composite substrate comprises an ultraviolet light removal layer and two glass layers, the ultraviolet light removing layer is located between the two glass layers. According to the perovskite photovoltaic cell, the durability and the stability are improved, and the service life of the cell is greatly prolonged.

The invention is suitable for the technical field of precious metal recovery, and provides a method for converting waste into a fibrous membrane, which comprises the following steps: adding papermaking black liquor and a polyamine polymer into water, stirring and mixing, adding an auxiliary agent, and carrying out hydrogen bond crosslinking to obtain a uniform spinning solution; enabling the spinning solution to pass through an electrostatic spinning device to obtain a lignin-based nanofiber membrane, soaking the lignin-based nanofiber membrane in an aqueous solution containing epoxy chloropropane for a re-crosslinking reaction, and airing in a room-temperature environment to obtain the reinforced lignin-based fiber membrane. The invention also provides the fiber membrane which is prepared by the method. The invention also provides an application of the fiber membrane in gold ion extraction. The fiber membrane prepared from the alkaline lignin in the papermaking black liquor shows excellent ion selectivity and reusability on gold ions, precious metal gold can be stably adsorbed and extracted from the electronic waste pickle liquor, the cost is low, and no organic solvent exists in the preparation process.

The present invention relates to the field of petrochemical technology, specifically a preparation method and application of an ultra-low surface tension drainage aid, including 35-45 parts by weight of n-butanol, 80-200 parts by weight of triazine-based amphoteric polyoxyethylene ether surfactants, 100-150 parts by weight of nonionic surfactants, 20-30 parts by weight of kerosene, and 80-110 parts by weight of deionized water; the present invention is compounded with triazine-based amphoteric polyoxyethylene ether surfactants and nonionic surfactants, as the main agent of a microemulsion drainage aid, the two form a good homogeneous microemulsion system, the drainage aid emulsion has low surface tension, and good temperature resistance, when the mass fraction of the triazine-based amphoteric polyoxyethylene ether surfactant in the drainage aid is 0.8%, the drainage aid rate is as high as 88.12%. It has broad application prospects in acid fracturing fluid drainage.

The present invention provides a polynitrile compound, a non-aqueous electrolyte and a lithium ion battery. The structural formula of the polynitrile compound is shown in Structural Formula I or Structural Formula II. Wherein, R1 to R2 are independently selected from halogen, a halogen-substituted C1 to C6 hydrocarbon group, a group containing a halogen-substituted sulfonate group, a group containing a halogen-substituted sulfone group or a group containing a halogen-substituted phosphonate group. The polynitrile compound of the present invention is used as an electrolyte to form a stable interface film at the interface of the material. The film has a good conductive lithium ion channel and does not cause the collapse of the lithium ion channel during the cycle process, thereby improving the cycle and low temperature performance. In addition, the introduction of a side chain functional group structure containing at least halogen can form a thinner inorganic SEI film, occupy the SEI film site, and can alleviate the problem of impedance increase caused by excessive polymerization of nitriles. At the same time, the SEI film is enriched and stabilized and can complex the transition metal in the positive electrode material, so the low temperature and high temperature storage performance can be improved.

The invention discloses a modified aluminum-lithium alloy material as well as a preparation method and application thereof. The preparation method of the modified aluminum-lithium alloy material comprises the following steps: (1) heating a mixture of an aluminum-lithium alloy and ethylene amine at 200-350 DEG C to react for 1-6 hours, so as to obtain the aluminum-lithium alloy subjected to surface nitriding treatment; and (2) a dispersion liquid containing the aluminum lithium alloy subjected to surface nitriding treatment, an organic solvent, a surfactant and organic amine is mixed and reacts for 0.2-2 h, then the temperature is increased to 40-80 DEG C, a hydrolysis promoting agent and a silicon source are added, the reaction continues for 2-24 h, and the modified aluminum lithium alloy material is obtained. The prepared modified aluminum-lithium alloy material has a compact and firm coating layer, the surface activity of the aluminum-lithium alloy can be effectively reduced, and the storage stability of the aluminum-lithium alloy is improved.

The invention relates to a bionic absorbable composite bone implant and a preparation method thereof.The preparation method comprises the steps that S1, an inorganic non-metallic material, doped active ions, a polymer raw material, a hydrogel precursor and the like are mixed, and 3D printing slurry is prepared; s2, performing 3D printing to prepare a bone implant semi-finished product; s3, carrying out a plasma etching reaction; s4, placing in a specific mold, performing air pumping and deflating treatment, then releasing pressure, and finally performing vacuum heat preservation reaction for a period of time; s5, after the heat preservation reaction is completed, the specific mold is horizontally moved to a freezing table to be subjected to specific orientation freezing treatment; and then demolding, and carrying out freeze drying treatment on the obtained implant, so as to obtain the final composite bone implant. The composite bone implant has a long-range ordered porous structure, meets medical use requirements in strength and toughness, and has an excellent application prospect.

The invention provides polyether modified fluorine-containing polysiloxane. The polyether modified fluorine-containing polysiloxane comprises a structure as shown in a formula (I). Compared with the prior art, the polyether modified fluorine-containing polysiloxane prepared from the fluorine-containing polysiloxane is used as the organosilicon slipping agent, can float on the surface of a paint film as a coating additive, and has very low surface activity due to very low surface energy of fluorine atoms in long-chain fluorine-containing side group silicone oil; therefore, the effect of reducing the surface tension of the coating can be achieved. Meanwhile, due to the introduction of trifluoropropyl, the lubricating property of the silicone oil can be greatly improved, the friction coefficient of a coating film to a second surface can be reduced, and the coating film is prevented from being scratched, so that the continuous chemical coating operability of the coating is improved.

A heat treatment process of a nodular cast iron terrace die casting belongs to the technical field of lost foam nodular cast iron heat treatment. According to the method, the cleaned nodular cast iron male die casting is sequentially subjected to two-section type preheating treatment, high-temperature quenching heat preservation, tempering treatment and cleaning and drying. The two-stage preheating treatment has a heat preservation process, so that the overall temperature of the nodular cast iron male die casting is uniformly increased. And the heat source of the preliminary preheating treatment is heat recovery in the subsequent cooling process, so that the energy is saved. And through high-temperature quenching and heat preservation treatment, an original matrix is converted into tempered martensite and retained austenite, so that the casting has high hardness and certain toughness, the lubricating property of graphite is reserved, and the wear resistance is enhanced. The ethylene-propylene-diene copolymer added into the quenching oil is a cooling accelerant and can accelerate the cooling process, the added high-temperature amine antioxidant can prevent part of tissues of a casting from being oxidized in the high-temperature quenching process, and the added fatty glyceride can reduce the surface activity of the quenching oil, so that rapid heat exchange is realized.

The invention discloses an aqueous film-forming foam fire extinguishing agent. The fire extinguishing agent comprises the following components by mass percentage: 0.5%-1.5% of a fluorocarbon surfactant, 2.5%-8.0% of a hydrocarbon surfactant, 5.0%-16.0% of a foaming agent, 2.0%-7.0% of a solubility promoter, 3.0%-13.5% of an anti-burning agent, 2.0%-7.0% of an antifreeze agent, 10.5%-32.5% of a thickener, 0.1%-1% of a preservative, and the balance is water, and the sum of the above components is 100%. A preparation method of the aqueous film-forming foam fire extinguishing agent is also provided. The preparation method is simple, easy to operate, and has low cost. The prepared fire extinguishing agent is environmentally friendly and has high fire extinguishing effect.

The application relates to an ultrathin device and a preparation method and application thereof. The ultrathin device is prepared by the following steps: a mixture containing raw material powder, a binder and a solvent is granulated by a spray drying method to obtain a first precursor, the raw material powder comprises metal material powder and / or ceramic material powder, the surface area average particle size of the raw material powder is 1-15 mu m, the mass ratio of the raw material powder to the binder is 100:(1-10), the surface area average particle size of the first precursor is 40-80 mu m, and the fluidity of the first precursor is lower than 30 s / 50 g; the first precursor is subjected to a forming treatment to obtain a second precursor, the second precursor has a preset shape; and the second precursor is subjected to a heat treatment to obtain the ultrathin device, and the thickness of the ultrathin device is less than or equal to 1 mm.

A secondary battery, a battery module, a battery pack, and an electric device. The secondary battery includes a cathode piece and a non-aqueous electrolyte, in which, the cathode piece includes a cathode active material, and the cathode active material has a chemical formula represented by LiaAxMn1-yByP1-zCzO4-nDn; the non-aqueous electrolyte includes a first lithium salt and a first additive, optionally, the first lithium salt is one or more selected from the group consisting of LiN(CmF2m+1SO2)(CnF2n+1SO2) and Li(FSO2)2N, m and n represent positive integers; the first additive includes one or more of a compound represented by Formula 1. Using the cathode active material and / or a combination of the cathode active material and the non-aqueous electrolyte improves the rate performance, cycle performance, and high temperature stability of the lithium manganese phosphate secondary battery.

The invention relates to the technical field of corrosion inhibitors for crude oil, and is a wetting agent for oil-based drilling fluid with extremely low surface tension and a preparation method thereof. The raw materials of the wetting agent for oil-based drilling fluid with extremely low surface tension include 20 to 30 parts of tall oil fatty acid, 20 to 30 parts of oleic acid, 5 to 10 parts of turpentine, 10 to 20 parts of hydroxyethyltetraethylenepentamine, 10 to 20 parts of white oil, and 10 to 20 parts of dispersant by weight. The wetting agent for oil-based drilling fluid with extremely low surface tension provided by the invention has good application effect in well slurry, is easy to operate in the preparation method, can effectively reduce the surface activity of the drilling fluid system, has good rheological properties, improves the demulsification voltage, has low cost, and has strong wettability, which provides a strong guarantee for on-site drilling fluid construction.

This application discloses a method for preserving the aroma and optimizing the bubbles in prickly pear sparkling wine using mannoprotein. During the secondary fermentation stage of the prickly pear sparkling wine, mannoprotein is added to the fermentation system at an amount of 200-600 mg / L. This application addresses the problems of monotonous aroma and poor bubble quality in existing prickly pear sparkling wines.

The invention relates to the field of fine chemical engineering, and provides alkynol modified fluorine-containing polysiloxane as well as a preparation method and application thereof, hexamethyldisiloxane, octamethylcyclotetrasiloxane, hydrogen-containing tetramethylcyclotetrasiloxane and trifluoropropylmethylcyclotrisiloxane are used as raw materials to prepare side chain fluorine-containing polysiloxane, and the side chain fluorine-containing polysiloxane is prepared by using hexamethyldisiloxane, octamethylcyclotetrasiloxane, hydrogen-containing tetramethylcyclotetrasiloxane and trifluoropropylmethylcyclotrisiloxane as raw materials. And reacting the fluorine-containing polysiloxane with alkynol polyoxyethylene ether to obtain alkynol modified fluorine-containing polysiloxane. The preparation method is simple in process, easy to control, short in preparation period and suitable for industrial production; meanwhile, as an organic silicon ultra-low-foam wetting agent, the organic silicon ultra-low-foam wetting agent has good base material wettability, so that the problem that the protective performance and the decorative effect are reduced due to surface coating defects such as edge shrinkage, hole shrinkage and uneven coating which are easily caused by poor wetting effect of a water-based coating in woodware and industrial base material surface coating can be solved; and bad consequences caused by bubbling do not need to be worried.

The invention provides a silicon-carbon composite negative electrode material and a preparation method thereof, and particularly relates to the technical field of lithium battery negative electrode materials. The silicon-carbon composite negative electrode material comprises a core layer, a middle layer and a shell layer. The core layer is made of modified graphite, the middle layer is a silicon-carbon composite layer, and the shell layer is a carbon coating layer. In the silicon-carbon composite negative electrode material, the proportion of silicon is 5-30 wt%. The silicon-carbon composite negative electrode material has a Si diffraction peak shape and a graphite diffraction peak shape in X-ray diffraction. According to the silicon-carbon composite negative electrode material, the energy density of the battery is improved, the cycle performance is improved, powerful technical support is provided for developing a next-generation high-performance lithium ion battery, the design of the silicon-carbon composite negative electrode material is compatible with an existing lithium ion battery manufacturing process, and the commercialization process of the novel negative electrode material is promoted.

The application discloses an EPDM sealing material for electronic water pump shaft seals and a preparation method thereof, and belongs to the technical field of rubber sealing materials. Double-bond modified hexagonal boron nitride and trifluoropropyltrimethoxysilane composite nanospheres are used as auxiliary reinforcing phases. The double-bond modified hexagonal boron nitride is a layered ceramic material with the characteristic of easy sliding. The trifluoropropyltrimethoxysilane composite nanospheres have a hollow structure and play a role similar to that of a ball bearing in the rubber matrix. The two can synergistically reduce the friction between the rubber molecular chains, so that the rubber molecular chains can more freely slide and deform under stress, can absorb stress at high and low temperatures, have good temperature impact resistance, and can adapt to the working requirements of electronic water pump shaft seals in cold northern regions.

The present invention provides a nano surfactant for oil washing, preparation and application thereof. The preparation method comprises the following steps: uniformly mixing a water-soluble component, an oil-soluble component and a surfactant to obtain a premix; heating the premix to 140-300°C under an atmospheric environment so that the material is in a molten state and a polycondensation reaction occurs between the materials, and after reacting for 10-180 minutes, nanoparticles having a hydrophilic group and a hydrophobic group are obtained. The prepared nano surfactant can have a high oil washing efficiency (more than 50%) at a relatively low concentration (0.005-0.1wt%), is not easily adsorbed by the formation, has a relatively low dynamic adsorption amount (≤5%), can emit a relatively strong fluorescence after being excited by light, and can be used as a fluorescent tracer to monitor the concentration and extraction of the nano surfactant underground. The preparation process is simple, the raw material cost is low, it is non-toxic, and it is easy to realize large-scale production.

The present invention discloses a composite tube for a disposable infusion set and a preparation process thereof, belonging to the technical field of medical devices. First, the preparation process of the composite tube for a disposable infusion set comprises the following steps: mixing polyvinyl chloride resin, a light-shielding modifier, a lubricant and a plasticizer at 110 to 120°C for 1 to 2 hours, then extruding and granulating at an extrusion temperature of 135 to 140°C to obtain a modified polyvinyl chloride resin, and then co-extruding low-density polyethylene and the modified polyvinyl chloride resin to obtain a composite tube for a disposable infusion set with an inner layer of a low-density polyethylene layer and an outer layer of a modified polyvinyl chloride layer. The composite tube prepared by the present invention is a double-layer structure, with an inner layer of low-density polyethylene and an outer layer of modified polyvinyl chloride prepared by the present invention. Compared with the existing polyvinyl chloride infusion tube, the present invention aims to achieve the purpose of reducing the transmittance of light in the wavelength range of 290 to 450nm by adding a light-shielding modifier to the polyvinyl chloride resin.

The utility model relates to the technical field of neodymium iron boron permanent magnet materials, in particular to a neodymium iron boron powder surface passivation device. The device comprises a gas inlet mechanism, a main body mechanism and an exhaust mechanism which are sequentially communicated, the gas inlet mechanism comprises a nitrogen storage tank, a compressed air storage tank, a mixer, a pressure meter, an oxygen meter, a gas flowmeter and a thermometer, the pressure meter, the oxygen meter, the gas flowmeter and the thermometer are sequentially communicated, and the main body mechanism comprises a sample reaction bottle and a transmission mechanism used for driving the sample reaction bottle to turn over. Nitrogen and dry air are mixed to serve as a passivation gas source, the oxidation reaction rate of neodymium iron boron powder is controlled by flexibly controlling the conditions of oxygen content, temperature, pressure, gas flow and the like in the passivation process, a compact oxidation film is formed on the surface of the neodymium iron boron powder through slow oxidation reaction, the surface activity of powder particles is reduced, and the passivation effect is improved. And the powder is prevented from spontaneous combustion / explosion in the powder testing process under the open condition.