1945 results about "Oil bath" patented technology

The invention discloses a method for preparing a precursor for chemical vapor deposition of metallic rhenium and belongs to the technical field of material preparation. According to the method, ReCl5 is made to react in an oxidizing atmosphere, efficient solid-liquid-gas separation is conducted on reactants and products with a sand core filter bulb so that reactants, reaction products and waste gas can be effectively separated, the reaction products ReOCl4 and ReO3Cl are gathered in a collection vessel heated by an oil bath pan at the same time, oxygen introduction is stopped after reaction ends, circulation of inert gases is maintained, a tube furnace is cooled, the oil bath pan is heated at the same time to enable ReO3Cl to volatilize to enter a rectification unit to be collected, ReOCl4 is purified, and then the high-purity precursor ReOCl4 for chemical vapor deposition of metallic rhenium is obtained. By the adoption of the method, reaction efficiency is high, ReOCl4 and ReO3Cl are separated through rectification, and the purity of the product ReOCl4 is improved.

The invention relates to a method for preparing a graphene loaded ferroferric oxide magnetic nanometer particle composite material. The method comprises the following steps of: (1) dispersing graphite oxide into deionized water, pouring into a vessel after ultrasonic and centrifuging, putting the vessel into an oil-bath pan, adding hydrazine hydrate and an anionic surfactant for heating, condensing and refluxing, and cooling and drying to obtain modified graphene; and (2) dispersing the graphene into aqueous solution, and ultrasonically stirring and centrifuging to obtain modified graphene dispersion liquid; and weighing a soluble trivalent ferric salt and divalent ferric salt, dissolving the salt into the deionized water, introducing nitrogen, pouring into the modified graphene dispersion liquid, dripping ammonia after uniform ultrasonic stirring, heating for reaction, washing and collecting a product, and drying the product. The method is simple and easy for industrial production; and the prepared composite material has the advantages of pure crystal phase, uniform distribution and excellent electrocatalytic activity.

The tester comprises: a clamp (22) to fix the upper sample (23) on its arc groove above the lower sample (25) connected to the middle of supporting shaft (37) by a flat key, a oil bath (26) to accommodate part (25), and a pressure bearing (20) with outside circle contacted to the upper arc surface of (22). This invention can protect the failure condition, and cuts wear test time.

The invention relates to a supercritical-state gas adsorption desorption apparatus and an application method thereof. The apparatus is capable of simulating gas isothermal pressurization absorption, isothermal pressure-reduction desorption and isotope fractionation experiments under stratum conditions. The apparatus comprises a gas feed system, a pressurization system, a vacuumization system, a gas adsorption desorption system, a gas acquisition and analysis system, and a data acquisition and processing system. The apparatus is capable of realizing isothermal pressurization absorption and isothermal pressure-reduction desorption experiments, the sampling point quantity is more and is controllable according to experiment requirements, the adsorption and desorption trends are relatively well reflected, also the temperature in the experiment process is controllable, the oil bath temperature is set according to experiment requirement, relatively similar effect compared with actual stratum conditions is realized, shale gas exploitation is simulated through an isothermal pressure-reduction process, so that the stratum-condition maximum gas desorption amount is calculated. Operation in the experiment process is simple and safe, and error caused by human factors is reduced by acquiring data through the data acquisition and processing system. The apparatus is widely applicable to gas adsorption and desorption experiment processes.

The invention discloses a method for preparing a graphene / silver / titanium dioxide composite material. The method comprises the following steps: (1) weighing graphene sheets; (2) dispersing the graphene sheets weighed in the step (1) into an aqueous solution of a proper amount of surfactants (PVP or SDS), and performing ultrasonic dispersion; (3) adding silver nitrate in a calculated amount into the graphene sheet solution treated in the step (2), preserving the constant temperature in an oil bath pan, dripping a reducing agent (N2H4, NaBH4 or vitamin C) in a corresponding calculated amount, and preserving the constant temperature for a period of time, thereby obtaining a graphene / silver composite material solution; and (4) heating the graphene / silver composite material solution prepared in the step (3) to another temperature, preserving the constant temperature for a certain time, slowly adding a chlorotitanate solution (TiCl3 or TiCl4) of a calculated amount, and performing suction filtration, washing, vacuum drying treatment, thereby obtaining the graphene / silver / titanium dioxide composite material powder. The method is simple in preparation process and easy to popularize and apply.

The invention provides a method for recovering waste circuit boards. The method comprises the following: 1. a step of heating and centrifugally separating, which is to put the waste circuit boards in an oil bath, heat to melt solder and pass the waste circuit boards with the solder melted through a centrifugal machine so as to efficiently separate the solder from the waste printed circuit boards; 2. a step of cracking in vacuum, which is to put waste circuit board substrates with the solder removed, as well as an electron component in a vacuum cracking device, heat for thermal cracking, collect thermal-cracking volatile products and condense the volatile products into fluid oil; and 3. a step of collecting solid matter after vacuum cracking, which is to classify and collect the electron component and the circuit board substrates after thermal cracking, so as to recover precious metals and other valuable metals of the electron component, as well as copper foil, glass fiber and other substances on the circuit board substrates. The method performs treatment by stages according to the structural characteristics of the waste circuit boards, has the advantages of simplicity, no pollution, low cost, high efficiency and high rate of recovering waste resources of the waste circuit boards, and is suitable for industrial application and the large-scale recovery of the waste circuit boards.

The invention relates to a gold nucleus and silver shell double-metal nanocrystal and a preparation method thereof. The crystal is in a rod-shaped structure with a regular crystalline form, wherein the rod-shaped structure is focused on a {100} surface and comprises a double-cube triangle, a cube and a five-twin crystal section, and simultaneously the side surface of the rod-shaped structure is a {100} type crystal surface. The preparation method comprises the following steps of: heating a polyhydroxy-alcohol solution containing chloroauric acid, polyvinylpyrrolidone and silver nitrate, cooling at a room temperature and carrying out centrifugal precipitation to obtain a gold crystal seed; and adding the gold crystal seed obtained by centrifugal separation to a polyhydroxy-alcohol solution containing the polyvinylpyrrolidone, adding the silver nitrate in a molar ratio [AgNO3] / [HuAuCl4], heating by using an oil bath to obtain a product solution, and then carrying out centrifugation to obtain a product. In the first step of reaction in the preparation method, a certain trace of silver nitrate is added to the solution so that the shape of a gold nucleus is effectively controlled, the crystal with a regular crystalline form is obtained, and the shape of a silver shell is finally decided on the shape of the gold seed. The preparation method realizes rapid and batch controllable preparation of a silver-coated gold nano nucleus / silver structure crystal forced on the {100} surface.

The invention introduces an epoxy resin-based piezoelectric and composite damping material and a preparation method thereof, which comprises the following materials by weight portion: 100 portions of epoxy resin, 30 portions to 220 portions of piezoelectric ceramic powder, 0.5 portion to 5 portions of graphitized carbon black and 30 portions to 120 portions of curing agent. After being mixed, dispersed and added with the curing agent to be evenly blended and then poured, cured and shaped, the piezoelectric and composite material can be polarized in an HVDC oil-bath electric field and has good damping property (tan Delta is not less than 0.3) in a wide-temperature range (10 to 100 DEG C) and can also be applied in projects as free damping material as well as in an intelligent vibration and noise reduction system. In addition, the piezoelectric and composite material can be made into damping paint, putty, slurry and potting adhesive and poured into various section materials to be used in vibration and noise reduction projects in the fields such as vehicles, industrial machinery, civil construction, household appliances, precision instruments, military equipment, etc.

Organofunctional silanes are applied to metal surfaces using an oil bath. Metal is immersed in an oil bath containing approximately 2% silane. In a preferred embodiment, the metal is a tire cord. The silane can either be hydrolyzed or unhydrolyzed. The hydrolyzed silanes can be in combination with a water dispersible resin. When the tire cord is coated with silane using the present method, it allows a tire to be formulated with lower sulfur levels and without cobalt.

The invention discloses a preparation method and an application of a load type nano-gold catalyst. The preparation method comprises the following steps of: (1) adding 2.0g of halloysite nanotube carrier, 2.05 to 6.15mL of chlorogold acid solution with a concentration of 10g / L and 40 to 120mL of deionized water to a 250mL flask with three necks; (2) putting the flask into an oil bath with the temperature of 60 DEG C; adjusting the pH of the solution to 8 to 12 by using 4.0M ammonia water; then carrying out stirring reflux at 95 DEG C-105 DEG C for 1 hour; filtering; rinsing for 5 minutes by using 10 to 20mL of 4.0M ammonia water; washing twice with 15 to 20mL of hot water; drying for 1 to 2 hours at 100 DEG C; and finally roasting for 3 to 4 hours in air at 300 DEG C to obtain the load type nano-gold catalyst. The invention has the advantages of simple and convenient preparation method, uniformly dispersed gold particles and high loading efficiency. The catalyst provided by the invention can be used for cyclohexene oxidation of cyclonene and cyclohexenol, with the advantages of mild reaction condition, good activity and selectivity and less catalyst utilization quantity.

The intelligent temperature adjustment textile hydrolyae and polymerize the ethyl-orthosilicate, the absolute ethyl alcohol and the distilled water silicon dioxide network structure gelatin in normal temperature. Then joins the alcohol type changeing material to make bonds change material. Finally mix the bonds change material and bond then spread on the textile's surface. This invention's intelligent temperature adjustment textile is insert change material into the high thermal conductive silicon dioxide's network gelation to make nanometer even micronanometer bonds change material. Then spread the bonds change materialon the textile surface. Thus do not ceeate the oil bath influence on the textile and the bonds change material is stable and has relitave high change enthalpy and sutible temparature adjustment sector. Moreover, the preparation method's technological process is simple, the requests is low, and the reaction process is easy to control.

The invention relates to a nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: uniformly stirring graphene oxide, ethanediol and N-methylpyrrolidone in a mass ratio of (30 to 60): (1100 to 2800): (500 to 1600), and performing an ultrasonic dispersion treatment, so as to obtain a uniformly-dispersed suspension liquid; adding a metal salt solution and an H2PtCl6.6H2O solution in the uniformly-dispersed suspension liquid, uniformly stirring, and performing an ultrasonic dispersion treatment, so as to obtain a precursor; heating the precursor to 90-180 DEG C in an oil bath in a stirring condition, insulating heat, and performing condensation reflux for 1 to 5 hours, so as to obtain a black turbid liquid; performing vacuum suction filtration on the black turbid liquid, sequentially washing by acetone, distilled water and absolute ethyl alcohol, and performing vacuum drying at a room temperature to obtain the nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst. The preparation method disclosed by the invention is simple in process and low in energy consumption; the prepared nitrogen-doped graphene-loaded Pt-based alloy nanometre electrocatalyst is high in catalytic activity, good in stability, uniform in the dispersion of nanometre particles, and controllable in the particle size of the nanometre particles.

The invention discloses a method for preparing a nano-scale lithium ion battery anode material. The anode material is LiNixCoyMnzO2(x+y+z=1). The method comprises: dissolving compounds which contain Li, Ni, Co and Mn elements in deionized water, fully mixing the mixture to obtain uniform mixed solution, adding solution of precipitator into the mixed solution, transferring the mixed solution into a water / oil bath pot to heat the mixed solution to perform a reaction fully to obtain a LiNixCoyMnzO2(x+y+z=1) precipitate, filtering the reaction solution, washing the precipitate, drying the precipitate by spraying, and sintering the precipitate in the air at a high temperature to obtain the LiNixCoyMnzO2(x+y+z=1) anode material of which the primary particle size is of nano scale. In the invention, the LiNixCoyMnzO2(x+y+z=1) anode material for alpha-NaFeO2 type lithium ion batteries, of which the primary particles have a nano spherical polymer structure, is prepared by combining co-precipitation and spray drying, the active ingredients are mixed uniformly, the activities of the reactants are high, the reaction time and reaction temperature are reduced, the obtained product is of the nano scale and the particle size distribution of the product is uniform.

The invention provides a preparation method of a graphene nanoplatelet / epoxy resin nanocomposite material. The preparation method comprises the following operating steps of: dispersing graphene nanoplatelets in an organic solvent, putting the organic solvent into an ultrasonic apparatus, carrying out ultrasonic treatment on the materials in an ice bath with power more than or equal to 250W for 1.5 hours, and simultaneously stirring the materials; adding epoxy resins, carrying out ultrasonic treatment in the ice bath with power more than or equal to 250W for 1.5 hours, and simultaneously stirring; putting the materials into an oil bath, raising the temperature to the boiling point of the used organic solvent, simultaneously stirring for 5-15 hours, and then putting the materials into a vacuum oven to be decompressed and heated for 2 hours; cooling to room temperature, adding a curing agent according to the usage amount of the epoxy resins, and stirring the materials for 0.5 hour; and putting the materials in the vacuum oven to be decompressed for 1 hour at normal temperature, then pouring the materials into a forming mold, and putting the forming mold into the oven to be cured, thus obtaining the graphene nanoplatelet / epoxy resin nanocomposite material. In the method, the graphene nanoplatelets are utilized to improve the thermal properties and flame retardance of the epoxy resins, thus solving the problem of dispersion of the graphene nanoplatelets in epoxy resin matrices.

In a bearing oil supply structure for a wind turbine generator provided with a planetary-type planet gear box having a planet gear that rotates about a planet pin fixed to a carrier with a slide bearing interposed therebetween, lubrication of the slide bearing is achieved by supplying lubricant oil by using an oil bath in a lower rotation region and by supplying lubricant oil by injecting lubricant oil pressure-fed from a lubricant oil source through a nozzle in an upper rotation region.

The invention discloses a cross-linked polyvinyl chloride (PVC) foaming material and a preparation method thereof. The foaming material is prepared by the following the steps of: uniformly mixing PVC, a heat-resisting modifier, a PVC processing aid, a plasticizer, a stabilizer, a foaming agent, a sensitizer, a lubricating agent and an inorganic filler in certain parts by weight, blending, granulating, and extruding into a sheet; and radiating through an electronic accelerator, and putting into an oil bath for foaming. The PVC can form a three-dimensional netlike structure under the condition of not adding any cross-linked polymer or cross-linked agent. The prepared PVC foaming material is cross-linked uniformly, foam holes are uniformly dispersed, and the cross-linked PVC foaming material has low production cost and high efficiency.

The invention relates to a vapour-liquid two-phase flow accelerated corrosion test device which is characterized by comprising a testing autoclave body, an oil bath heating jacket, an autoclave body cover, a magnetic rotating device, a high-temperature reference electrode, a graphite auxiliary electrode, a working electrode, a variable frequency motor, a potentiostat, a corrosion measurement computer, an equipment control cabinet, an inner lining, a gas-phase generator, an electric heater and a thermocouple sensor. In the invention, an electrochemical measurement method is adopted to carry out experimental study on the relevant properties of vapour-liquid two-phase flow accelerated corrosion, including the measurement of relevant coefficients of the transient corrosion property, the corrosion impedance and the corrosion reaction, the relation between mass transfer and corrosion reaction, the relation between the vapour-liquid two-phase flow pattern and the corrosion rate and production and breakage mechanism of a corrosion product membrane and the critical characteristic of the breakage. The high-speed rotation is realized and meanwhile, and the good sealing property is ensured by adopting the magnetic rotating device.

The invention relates to a preparation method of a Coca-Cola flavour for tobacco, including the following steps: baked Coca-Cola pulse flour, amino acid, reducing sugar, water and propanediol are subject to flash heat reflow by oil bath while stirring, and then recirculated water is used for cooling the mixture to room temperature, thus obtaining the Coca-Cola flavour for tobacco. The invention also relates to a product and an application thereof obtained by adopting the method The Coca-Cola flavour for tobacco prepared by the invention can be widely used in tobacco perfuming; and compared with commercially available Coca-Cola flavour, the Coca-Cola flavour for tobacco of the invention contains strong nut fragrant and burnt sweet and fragrant, is more close to natural Coca-Cola flavour, can increase fragrant, remove impurity and modify cigarette smoke, and also has favorable thermal stability.

The invention discloses an N-doped graphene / nickel ferrite nanometer compound material and a preparation method thereof. The preparation method comprises the following steps: performing ultrasonic dispersion on graphite oxide in water, thereby acquiring a graphite oxide solution; adding ferric nitrate and nickel nitrate into the graphite oxide solution and continuing to perform ultrasonic dispersion; adding urea into the mixed solution; transferring the mixed solution into a three-neck flask; after oil-bath heating reaction, centrifugally washing and drying a product, thereby acquiring the N-doped graphene / nickel ferrite nanometer compound material. According to the method, the urea is adopted for reducing the graphite oxide; while reducing, nitrogen atoms are doped on the surface of the graphene; the surface chemical property of the graphene is changed and the surface defect of a chemical method for preparing the graphene is overcome by the doping of the nitrogen atoms; alkalinity is supplied through the urea hydrolysis, so that nickel ferrite is formed on the surface of the N-doped graphene; the accumulation and agglomeration of the graphene in layers can be further stopped by the nanometer particles of the nickel ferrite, so that the electrochemical property of the compound material is increased.

The invention relates to an electrocatalyst, in particular to a gold-palladium alloy / carbon nitride composite nanomaterial and a preparing method and application thereof. The preparing method comprises the steps that g-C3N4 powder is weighted and dissolved in purified water, and ultrasonic dispersion is carried out; an HAucl4 solution and an H2Pdcl4 solution are added into the mixture in sequence, magnetic stirring is carried out until the mixture is mixed evenly, and an NaBH4 solution is added in a dropwise mode, magnetic stirring is carried out until the mixture becomes uniform; an oil bath reaction is carried out; after the reaction is finished, the mixture is cooled to the indoor temperature; the gold-palladium alloy / carbon nitride composite nanomaterial is obtained after washing, centrifugal separating and drying are carried out. The composite nanomaterial can be used for electrochemical detection for hydrogen peroxide.

The invention discloses a nitrogen-doped porous carbon-coated metal nano composite catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) adding a fluoride into an acidic solution for reaction, then adding M<n+1>AX<n>, carrying out magnetic stirring reaction under a water bath condition, cleaning a product with deionized water, centrifuging, then sequentially carrying out ultrasonic cleaning and centrifuging with an organic solvent and deionized water, and carrying out freeze drying so as to obtain a reactant 1; 2) weighing a certain amount of thereactant 1, adding deionized water and an organic solvent, carrying out uniform ultrasonic dispersion, dissolving a transition metal salt and urea in deionized water, adding an obtained mixture in anobtained mixed solution of the reactant 1, and carrying out magnetic stirring reaction under an oil bath condition to obtain a reactant 2; 3) performing heat treatment on the reactant 2 and a nitrogen-containing compound in a high-temperature furnace to obtain a reactant 3; and 4) performing high-temperature reduction on the reactant 3 in a protective atmosphere to obtain the nitrogen-doped porouscarbon-coated metal nano composite catalyst. According to the preparation method, the problems that the oxygen reduction catalyst prepared in the prior art is easy to agglomerate and the ORR activityis reduced due to less exposure of active sites are solved.

The invention relates to the technical field of the nanometer material, and relates to a method for synthesizing the porous molybdenum carbide nanometer wire, and adopts the following steps: molybdate is dissolved in the water, and the mol concentration of the molybdenum atom is 0.02 to 1.5 mol / L; organic amine is filled in, and the mol ratio between the organic amine and the molybdenum atom is 20.0 to 1.0: 1; inorganic acid is dropped into the solution, and the pH value is adjusted to be 3 to 6 until the white precipitate appears; the reaction solution is moved into an oil bath with the temperature of 30 to 60 DEG C to be reacted for 6 to 24 hours; (5) the product is washed, pumped, filtered and dried; the product is baked in the inert gases atmosphere at the temperature of 675 to 750 DEG C for 4 to 10 hours. The invention has the advantages that abundant nanometer hole structure is arranged between the nanometer particles, the granularity of the molybdenum carbide is small, the molybdenum carbide has rich porous structure and large specific surface area, the carbon on the surface is small, thereby favoring the secondary assembling of the catalyst and having wide application fields; the productivity can reach 95 percent or more; the conditions are simple and easy to be controlled; the preparation efficiency is high; the invention has favorable application and industrialization prospect.

The invention discloses a carbon nanometer tube / nickel zinc ferrite composite material manufacturing method. It includes the following steps: manufacturing modified carbon nanometer tube by the backflow of the mixture of carbon nanometer tube and aqua fortis in oil bath; weighing solubility Ni2+, Zn2+, Fe3+ salt with curtain quantity relative ratio to add to distilled water to do ultra sonic dispersion at room temperature; adding to modified carbon nanometer tube with 1:10-15 mass ratio to Fe3+ to do ultra sonic dispersion again; using 4-8mol / l strongly alkaline solution to make the pH value bigger than 8; reacting for 3-24h in hot kettle; cooling to room temperature after full reaction; filtering; washing by distilled water until the pH value reaches 7; washing by alcohol; drying at 60-100 centigrade degree for 5-12h. The formed material has good magnetic, dielectric and electrical properties, and has extensive application prospect in high density magnetic recording material field, and son.

The invention discloses a high-heat-resistance skin-core structural polylactic acid (PLA) fiber and a preparation method thereof. The core layer of the skin-core structural PLA fiber is stereocomplex polylactic acid (scPLA), and the skin layer is PLA with the L-lactic acid structural unit (D-LA) content of 0 to 5 mol percent. The preparation method of the skin-core structural PLA fiber comprises the following steps: after raw materials are dried, adding the raw materials into corresponding hoppers of a composite spinning machine respectively, and carrying out melt conveying, spinning, blowing cooling, winding feeding, oil bath stretching, steam bath stretching, tension heat setting, oiling, stacking, curling, relaxation and cutting to prepare skin-core structural PLA short fiber; or after the raw materials are dried, adding the raw materials into the corresponding hoppers of the composite spinning machine respectively, and carrying out one step method of melt spinning, side blowing cooling, oiling, stretching and heat setting to prepare skin-core structural multifilaments. The prepared skin-core structural PLA fiber is relatively high in heat resistance, and can be used in the fields of textiles, composite materials and the like.

The invention relates to a microwave absorption material with a periodic nanometer structure and a preparation method thereof. A wave absorber of the microwave absorption material with the periodic nanometer structure is filled around the inner walls of holes of a substrate, and the middle parts of the holes of the substrate have hollow structures. The preparation method comprises the following steps: preparing a sol precursor; and then preparing a porous template with a periodic nano-hole structure, dipping the porous template into sol precursor solution, performing oil-bath heating to a temperature of between 80 and 160 DEG C for 1 to 5 hours under the protection of nitrogen, taking out the template for drying, then annealing at a temperature of between 300 and 800 DEG C for 1 to 20 hours under the protection of the nitrogen, and finally obtaining the microwave absorption material with the periodic nanometer structure. The microwave absorption material has the advantages of small density, relatively lighter weight, and relatively better wave-absorbing effectiveness, and has absorption characteristics of narrow frequency and high efficiency.

The invention relates to a self-supported and flexible poly(3,4-ethylenedioxythiophene) (PEDOT) nanofiber / single-walled carbon nanotubes (SWCNTs) composite thermoelectric material thin film and a preparation method thereof. The self-supported and flexible PEDOT nanofiber / SWCNTs composite thermoelectric material thin film is prepared according to the following steps of (1) dissolving an anionic surfactant in deionized water, adding an oxidizing agent, and performing stirring in oil bath to obtain a mixed solution A; (2) adding a PEDOT monomer into the mixed solution A, performing oil bath reaction, cooling, separation and cleaning to obtain a PEDOT nanofiber, and dispersing the PEDOT nanofiber in methanol for use; (3) performing ultrasonic dispersion on SWCNTs in the methanol, performing ultrasound after a PEDOT methanol solution is mixed to obtain a mixed solution B; and (4) pumping and filtering the mixed solution B onto a micropore filtering film by a vacuum pumping and filtering method, and performing drying to obtain the self-supported and flexible PEDOT nanofiber / SWCNTs composite thermoelectric material thin film. Compared with the prior art, the high conductivity of PEDOT and high Seeback coefficient of the SWCNTs are effectively combined, and the power factor under a room temperature reaches 14.4 micro volts / mK<2>; and moreover, the preparation method is simple and has the advantages of high yield, high repeatability and the like.

The invention provides a method and apparatus of hot contraction pipe gas-buffered continuous expanding. The hot contraction pipe directing roller is arranged on the platform of expanding machine; drawing machine, water-bath case, oil-bath case, expanding mold case and cool shaping case are arranged on the platform in order; control machine is connected with the control ends of water-bath case, oil-bath case and drawing machine by the corresponding wires; hot contraction pipe expanding mold is arranged on expanding mold case with its both ends sealing connected with oil-bath case and cool shaping case by caliber exit piece. It adopts high-pressure gas forming principle and positive pressure gas-filled expanding method to heat plasticity the hot contraction pipe, fills high-pressure gas into expanding mold, then cool shapes it. It finishes the expanding process after heating, expanding, cooling and drawing.

The invention discloses a cationic viscoelastic surfactant and preparation and application thereof. The preparation method of the cationic viscoelastic surfactant comprises the following steps: firstly, mixing long-chain fatty acid with dimethylaminopropylamine according to a certain proportion, adding a catalyst solution to obtain a required amide product intermediate A by a series of reaction; allowing reflux condensation reaction of epoxy chloropropane and water at a certain proportion to be carried out in oil bath of 100 DEG C to obtain colourless and transparent 3-chloro-1,2-propylene glycol aqueous solution, namely an intermediate B; heating the intermediate A in oil bath for melting, and dropwise adding an aqueous solution B to obtain the required viscoelastic surfactant by a series of reaction; the surfactant can be mixed with a potassium chloride solution according to a certain proportion to obtain clean fracturing fluid which is low in cost and excellent in performance, besides, the clean fracturing fluid has excellent high-temperature resistance, shearing resistance, and excellent solid-carrying performance, is automatic and thorough in gel breaking, causes little damage to the reservoir stratum and has the characteristic of wide application range.

A fuel cell tester, which is provided with a plurality of channels and is capable of testing mono-cells or electric piles of a plurality of fuel cells simultaneously, is composed of a flow control unit, a humidifying unit, a signal acquisition unit, a temperature control unit and a discharging unit, etc. The flow control unit includes a plurality of mass flow controllers which are divided into a plurality of groups for the gas distribution of each channel; the humidifying unit is composed of humidifiers and shared constant-temperature oil bath, and the humidifiers are divided into a plurality of groups to humidify each channel; the signal acquisition unit is composed of a stress sensor, a temperature sensor, a humidity sensor and a data acquisition system; the temperature control unit heats the mono-cells or the electric piles to be tested of each channel through a plurality of ways, into which an external-cycle waterway is divided by a constant-temperature water tank; and the discharging unit adopts host plus module type electronic load to meet various test requirements through changing the combination of the modules. The fuel cell tester has the characteristics of accurate gas distribution measurement, precise temperature and pressure control, flexible and convenient test, reasonable layout, reliable performance, etc.

The present invention provides a dicyclopentadienyl-iron extinguishing experiment system, and comprises a dicyclopentadieny-iron evaporation device and an extinguishing terrace, wherein, the dicyclopentadieny-iron evaporation device comprises an air-loading source, a constant-temperature water bath, a constant-temperature oil bath and a dicyclopentadieny-iron evaporation chamber; the air-loading source is connected with the constant-temperature water bath; the constant-temperature water bath pre-heats the loading air; the constant-temperature water bath is connected with the constant-temperature oil bath; the dicyclopentadieny-iron evaporation chamber is arranged inside the constant-temperature oil bath, and the constant-temperature oil bath heats the loading air; the extinguishing terrace comprises a combustion chamber and a flue; an outlet pipe of the dicyclopentadieny-iron evaporation chamber leads to the interior of the combustion chamber. The experiment system can effectively measure the extinguishing effect of the dicyclopentadienyl iron for the liquid-phased or the solid-phased combusted flame; the experiment data has good repeatability; the experiment working situation has wide range; the processing, installation and application are convenient.