706results about How to "Increase the reaction area" patented technology

The invention relates to a nano carbon material with a network structure consisting of polymer chains, in particular to a nano carbon sulfur composite material with a network structure suitable to be used in a secondary lithium sulfur battery anode and a preparation method thereof. The carbon sulfur composite material is formed by adopting the following steps of: introducing functional groups onto carbon particles by adopting the electric conductivity and the porosity of a carbon material and the reaction capacity of similar condensed aromatics of the carbon material and by means of an irreversible chemical reaction; introducing the polymer chains, wherein the polymer chains are stretched, bent and cross-linked on the surfaces of the carbon particles to form a cross-linked network structure; and compounding a sulfur element or a polysulfide (m is more than 2) containing -Sm- structure into the network structure to form the nano carbon sulfur composite material with the network structure. The carbon sulfur composite material has a rich cross-linked network structure, nano-scale network pores constrain the sulfur element or the polysulfide (m is more than 2) containing the -Sm- structure in the network, and the active substances are limited in a certain region to react, so that the composite material has predominant electrochemical performance.

The invention discloses a method for producing porous nano silica and active carbon by utilizing rice hull ash, which comprises the following steps of: at lower temperature and normal pressure, performing secondary alkali dissolution on subcarbonate, and filtering to obtain alkali-dissolved filter liquor and filter residue; adding a certain amount of dispersing agent into the filter liquor, reducing temperature for ageing, filtering, washing, and removing the dispersing agent to obtain the porous nano silica; and adding an activating agent into the alkali-dissolved filter residue, activating, washing and drying to obtain the high specific surface area active carbon. The alkali and the active carbon can be recycled, and only a small amount of alkali and active carbon is lost. The method has the advantages of not seriously corroding equipment due to no high-temperature and high-pressure alkali boiling, sufficient raw materials, low price, no environmental pollution, and higher quality of the obtained active carbon and silica.

The invention relates to a preparation method of a graphene and manganese dioxide nanocomposite material, comprising: (1) stirring and mixing graphite, potassium nitrate and concentrated sulfur evenly, adding potassium permanganate, and reacting at 30-40° C. for 20-40 minutes , add deionized water at room temperature, add hydrogen peroxide after reacting for 15 to 30 minutes to obtain graphite oxide; (2) disperse the above graphite oxide in water, add hydrazine hydrate, and react at 95°C for 1 to 24 hours to obtain graphene (3) ultrasonically disperse the graphene in a saturated potassium permanganate solution, add acid, and react at 60-80° C. for 1-5 hours to obtain graphene and manganese dioxide nanocomposite material. The invention has the advantages of simple reaction, easy control, convenient operation and simple process; the obtained composite material has broad application prospects and can be used for catalysts, biosensing materials, electrode materials of lithium ion batteries and supercapacitor electrode materials, and the like.

A non-aqueous electrolyte secondary battery of the present invention has an electrode and an electrolyte layer. The electrode includes a collector having a lot of fine pores on its surface, and a membrane layer made of an electrode active material provided along the surface shape of the fine pores of the collector. By this structure, the battery can manifest an excellent performance even in charging and discharging at high speed without using a binder and conductive material.

The invention relates to a carbon-sulfur-shell matter composite material having a network dual-core shell structure and a preparation method thereof. The carbon-sulfur-shell matter composite material has a carbon-sulfur-shell three layer structure, a central core (inner core) is nano carbon particles, sulfur elemental or a polysulfide containing-Sm-structure (m>2) is directly deposited on the nano carbon particles, or functional groups are introduced onto the nano carbon particles by use of polycyclic aromatic hydrocarbon like reaction capacity of the carbon material and through an irreversible chemical reaction, polymeric chains are introduced in, a crosslinked network structure is formed through stretching, bending and crosslinking of the polymeric chains on the surface of the nano carbon particles, the sulfur elemental or the polysulfide containing the-Sm-structure (m>2) is composited onto the crosslinked network structure to form a nano sulfur layer having a network structure, then a mono-core shell nano composite material having a network structure is obtained and is used as a second layer (outer core) of the carbon-sulfur-polymer composite material having the network dual-core shell structure, an outermost layer is a shell matter layer, electronic and/or ionic conductivity of the material are/is improved, dissolving loss of discharge products can be further inhibited, and structural stability of the material is improved. The material is suitable for positive poles of lithium sulfur batteries, and has a prominent effect on improvement of cycle stability of the lithium sulfur batteries.

The invention discloses a neutral oil removal rust remover, which is mainly prepared from deionized water and the following components by mass fraction: 4-8% of physical dispersing agent, 8-10% of chemical chelating agent, 4-6% of oil-removing emulsifier and 1-4% of corrosion inhibitor. The preparation method disclosed by the invention comprises the following steps: firstly, preparing the components according to the proportioning requirements; weighting the ingredients in the chemical chelating agent to put into a container; adding the deionized water to evenly agitate, so as to obtain a solution A; adding the physical dispersing agent and the corrosion inhibitor to the solution A; agitating to obtain a solution B; additionally, adding the prepared components of the oil-removing emulsifier to the container; adding the deionized water to dissolve; adding a functional additive to obtain a solution C; and evenly mixing the solution B with the solution C under the agitation condition to obtain the neutral oil removal rust remover. By adopting the product disclosed by the invention, the oil and rust removal work can be quickly and efficiently finished, and the neutral oil removal rust remover is free of damage to a substrate.

The invention relates to a reduction-oxidation graphene/nanometer metallic silver aerogel with a three-dimensional structure and a preparation method thereof. The aerogel has a three-dimensional porous structure which is formed by a reduction-oxidation graphene slice layer and a polycrystal nanometer metallic sliver uniformly loaded on the reduction-oxidation graphene slice layer. The aerogel is prepared according to the preparation method which comprises the following steps: (1) uniformly mixing a soluble silver salt aqueous solution with a graphene oxide aqueous solution, thereby acquiring a pecursor solution; (2) transferring the pecursor solution into a reducing agent solution, reacting at room temperature, thereby acquiring a three-dimensional graphene/metallic silver nanometer grain hydrogel; and (3) taking out and cleaning the three-dimensional graphene/metallic silver nanometer grain hydrogel, drying, and then acquiring a target product. Compared with the prior art, the reduction-oxidation graphene/nanometer metallic silver aerogel has the advantages that the preparation method is simple, the whole reaction process is performed at a room temperature, no excessive extra energy consumption is required, and the like.

The invention discloses a making method of proton exchange film fuel battery pile in the fuel battery technical domain, which comprises the following steps: (1) pressing plane MEA into wave shape under heating condition; (2) adopting micro-fine pushing technique to punch the hyperthin plane metal plate; punching the plate with hole into wave shape to mate wave-shaped MEA; obtaining monopole board; (3) adopting laser welding technique to weld a couple of monopole board into double-pole board; (4) plating a layer of conductive polyaniline on the metal surface through circulating volt-ampere method. The invention improves the reacting efficiency and energy density, which lightens the weight and resists corrosion.

The invention provides a nano metal oxide/MXene heterostructure composite material and a preparation method thereof. According to the nano metal oxide/MXene heterostructure composite material, nano metal oxide is adsorbed on the surface of lamella MXene through van der waals force and evenly dispersed on a lamella base material to form the composite material of an integrated structure; metal oxideparticles with the size as 5 to 100nm occupies 10 to 90% of the total mass of the composite material; the nano metal oxide is one or several of TiO2, SnO2, Fe3O4, RuO2 and MnO2; the nano metal oxideis in a shape of one or several of a nanorod shape, a nanowire shape and a quantum dot shape. According to the nano metal oxide/MXene heterostructure composite material disclosed by the invention, thenano metal oxide is evenly dispersed on the MXene lamella, morphology is regular, a proportion is adjustable, and material conductivity is remarkably improved; the preparation method has the advantages of simpleness, lower cost and large-scale preparation; when being applied to lithium ion batteries or super capacitor composite materials, the nano metal oxide/MXene heterostructure composite material has excellent cycling performance and rate capability.

The invention relates to the field of battery manufacturing and energy storage, in particular to a preparation method of a bismuth-base catalyst/carbon nanofiber combination electrode for an all-vanadium redox flow battery. Firstly, spinning solution required for an experiment is prepared and then bismuth salt and the spinning solution are uniformly mixed. According to an electrostatic spinning method, a required nanofiber film is prepared and then the nanofiber film is pre-oxidized in the air and is carbonized in an inert atmosphere tube furnace so as to obtain the required bismuth-base electrocatalyst/carbon nanofiber combination electrode. After the obtained electrode material is cleaned and dried, testing of related electrochemical performance representation and charge-discharge properties can be carried out on the electrode material. The carbon fiber diameter, which is prepared according to the preparation method, is in the nano class; compared with a specific surface area of a conventionally used electrode material, the specific surface area of the bismuth-base catalyst/carbon nanofiber combination electrode is greatly increased. Moreover, the carbon nanofibers are compounded with a high-activity bismuth-base electrocatalyst, and thus, electrochemical activity of the electrode can be greatly improved, so that energy efficiency of the all-vanadium redox flow battery is greatly improved.

The invention provides a homogeneous phase immunoassay POCT detection technique and a system using same. The homogeneous phase immunoassay POCT detection technique has the characteristics of high sensitivity, high precision and wide range of chemiluminescence immune assay technique and rapidness, portability and the like of a POCT detection technique; in addition, as pure liquid phase detection, the homogeneous phase immunoassay POCT detection technique overcomes the problem that CV is relatively high due to an NC membrane, so that the detection precision is high, generally the CV can be controlled to be within 5%, and the level of precision of the POCT detection technique can reach or even exceed that of the chemiluminescence immune assay technique. In the system using the homogeneous phase immunoassay POCT detection technique, a reagent card and a POCT analyzer are separately designed, a sample to be tested is acquired by using the reagent card, and the system is convenient to carry over.

The invention discloses an expansible fire retardant having a double-layer core-shell structure, and a preparation method and application thereof. In the fire retardant, ammonium polyphosphate is used as a capsule core, and the capsule material sequentially comprises an epoxy resin layer and a melamine-formaldehyde resin layer from inside to outside. The preparation method comprises the following steps: mixing melamine and a 37% (mass percent) formaldehyde water solution, and dissolving in water to obtain a reaction system; regulating the pH value to 8-9, stirring while heating up to 60-95 DEG C, and reacting while keeping the temperature to obtain a melamine-formaldehyde prepolymer water solution; suspending ammonium polyphosphate powder particles in dispersant, adding epoxy resin and curing agent, and reacting while stirring; adding the melamine-formaldehyde prepolymer water solution and hardening agent, and reacting while stirring; and carrying out vacuum filtration, washing, and drying to obtain the expansible fire retardant having a double-layer core-shell structure. Since the fire retardant has the double-layer core-shell structure, the capsule material can not be extruded and broken easily in the processing procedure of the composite material, thereby avoiding the loss of the capsule core; and the fire retardant has better compatibility, fire retardance and water resistance.

The invention mainly discloses an aeration type sewage treatment device and method. The technical scheme is as follows: the device comprises a primary sedimentation tank, a biodegradation tank and a disinfection tank, wherein a filtering device is arranged in the primary sedimentation tank and comprises a filtering plate and a collection box; the biodegradation tank comprises a facultative tank, an aerobic tank and a clarifying tank in mutual connection; a biological packing frame is arranged in the facultative tank; an aeration device is arranged in the aerobic tank and comprises a lifting cylinder, a spiral aerator and a rotating disk; the spiral aerator is mounted on the upper side of the lifting cylinder; a rotating shaft of the spiral aerator penetrates the rotating disk; and aerobic microbial packing is arranged on the rotating disk. Particle impurities of sewage are removed by the primary sedimentation tank, and then the sewage enters the biodegradation tank for reacting and finally is subjected to disinfection treatment. In the invention, through multi-stage treatment of the sewage, harmful substances in the sewage are separated and degraded better, the blocking phenomenon does not happen frequently, the treatment efficiency is high while the effect is good, and the treated sewage reaches the national discharge standard.

The invention relates to a preparation method for an ordered ultra-thin electrode of a proton exchange membrane fuel cell. The preparation method comprises the steps of preparing an ordered electrode structure and establishing an ultra-thin catalyst layer; a process of impregnating and annealing is carried out on a carbon paper to obtain TiO<2> seed crystals; then a TiO<2> nanorod is grown through a hydrothermal method; a TiN ordered array is prepared through NH<3> etching; and the array is loaded with a catalyst to establish the ordered ultra-thin catalyst layer without containing a proton conductor (such as Nafion). The established ordered ultra-thin catalyst layer can be used for the proton exchange membrane fuel cell, other fuel cells and electrochemical devices.

The invention discloses a water-borne nano ultra-thin steel structure fire retardant coating, which comprises a carbon source, an acid source, an air source and auxiliaries, and consists of the following components by weight percentage: 20-40% of acrylic ester emulsion, 10-30% of ammonium polyphosphate (APP), 5-15% of pentaerythritol, 1-10% of melamine, 1-10% of nanometer material, 0.001-5% of auxiliaries, and 10-30% of water. The invention also discloses a preparation method of the fire retardant coating. The prepared fire retardant coating has the characteristics of stable performance and good fire resistant performance, the thickness of the prepared fire retardant coating is no more than 2mm, and the fire reissuance duration of the prepared fire retardant coating is up to 120 minutes.

The invention relates to the technical field of condiment production with biological enzyme method, especially relating to a production technology for producing nutrient seasoning powder by enzymatic method with comprehensive utilization of avian skeleton. The production technology includes the following steps: (a) preparing raw materials; (b) performing cooking process; (c) performing a first step of enzymolysis reaction; (d) performing a second step of enzymolysis reaction; (e) performing Maillard reaction; (f) performing homogenizing treatment; and (g) performing powder spraying treatment: subjecting the mixture after homogenizing treatment to powder spraying treatment in a spray tower, sieving to remove the residues with a sieve mesh, and uniformly stirring to obtain the nutrient seasoning powder. The invention uses new biological enzyme to perform enzymolysis and extraction to the nutrients in the avian skeleton completely, so that the prepared condiment has rich nutrition, rich aroma, good quality, pure natural taste, and high product yield.

The invention provides a nano-silver antibacterial agent which includes nano-silver antibacterial stock solutions. Nano-silver is included in the nano-silver antibacterial stock solutions, and the content of the nano-silver is 0.00025 mol/kg to 0.02 mol/kg. The invention further provides a preparation method of the nano-silver antibacterial agent. The nano-silver antibacterial agent can be foam emulsion and sprays in a flow state, can be used as washing-free sprays, and is convenient for people to use when cleaning with water is inconvenient in travel.

The invention relates to a gas liquid reaction kettle adopting a spherical crown-shaped micropore corundum gas supply apparatus. The gas liquid reaction kettle comprises a reaction kettle body and a gas supply device, the reaction kettle body comprises a main kettle body, the gas supply device comprises the gas supply apparatus, the gas supply apparatus is arranged in the main kettle body, and thetop surface of the gas supply apparatus is a spherical surface; the gas supply apparatus is in a spherical crown shape and is of an integrated structure, and upper and lower surfaces of the gas supply apparatus release gas simultaneously; the gas liquid reaction kettle has the advantages of a large gas supply amount, high stirring intensity, low resistance, high efficiency, low consumption, reliable operation, no blockage, ageing resistance, corrosion resistance, long service life and the like; in addition, the superficial area of contact between gas and liquid is greatly increased through alarge number of fine bubbles, the reaction speed is increased, and the reaction efficiency is improved; in addition, during gas supply, a high self-stirring effect of a large number of small bubbles is achieved, a stirring device of a conventional gas liquid reaction kettle does not need to be arranged, the structure can be simplified, the cost is reduced, and if the stirring device is arranged, the speed and efficiency of a gas liquid reaction can be further improved.

The invention relates to a preparation method of a heterojunction thin film composed of same metals and oxygen family elements. The preparation method comprises the following steps: mixing metal salt,acid and water to obtain a metal precursor solution; depositing the metal precursor solution on the surface of a base under the conditions that the pH is 2-11, and the temperature is 30-90 DEG C to form metal oxide; performing heat treatment on the metal oxide and at least one of sulfur source and selenium source for 2-120 minutes at a temperature of 100-600 DEG C and an air pressure of minus 0.05-1 MPa to obtain the heterojunction thin film; the heterojunction thin film is a metal oxide-sulfide heterojunction thin film, a metal oxides-selenide heterojunction thin film or a metal oxide-sulfide-selenide heterojunction thin film. The invention further discloses the heterojunction thin film prepared by the preparation method provided by the invention and application thereof. The preparationmethod has the advantages of being simple in equipment, low in cost, easy for large-area continuous production and the like; the prepared thin film is controllable in thickness component, dense and uniform in appearance and good in crystallization and optoelectronic properties.

The invention relates to the field of electrochemistry and new energy materials and in particular relates to a sulphur-graphene composite cathode material and a manufacturing method thereof. The material provided by the invention comprises 80-98wt% of element sulfur and 2-20wt% of grapheme. The manufacturing method comprises the following steps: mixing 80-98wt% of element sulfur with 2-20wt% of graphene, and adding dispersing agents and carrying out ball milling as well as carrying out vacuum drying for 1-2 hours at the temperature of 80-100 DEG C; placing into a vacuum sealing device or sealing device filled with inert gases, putting the sealing device into a tubular heater, heating to 150-160 DEG C and performing heat preservation for 10-24 hours; and then cooling to room temperature so as to obtain the sulphur-graphene composite cathode material. According to the invention, the composite material manufactured by using the graphene has the advantages of low price, light weight and good electric conductivity; and simultaneously, the raw materials are rich, the process is simple, the operation is easy and the mass production can be realized easily.

The invention discloses a method for preparing a lubricating coating with strong stability on the surface of a medical polyurethane material, comprising the following steps of: step 1, pretreating the medical polyurethane material so as to obtain positions with proper surface roughness and reaction activity; step 2, putting the polyurethane polymer material pretreated in the step 1 into a gas phase system of reaction solution or solute for grafting reaction; and step 3, cleaning and drying the reaction products from the step 2. The method can be widely used for preparing medical polymer materials and high-lubricity coating materials on the surface of medical instruments.