360results about How to "The experimental method is simple" patented technology

The invention relates to a well cementation cement sheath performance simulation experiment device and an experiment method. The experiment device comprises one set of cement cake circulation device, one set of cement sheath performance detection device and one set of cementing face shearing force experiment device. The experiment method comprises the following steps of: simulating the manufacture process of a well cementation test sample under the practical underground warm-pressing condition; detecting the sealing performance and the corrosion resistance of the cement ring; detecting the sealing performance and the corrosion performance of the cement ring; and detecting cementing face shearing force between a casing pipe test sample and the cement sheath and cementing face shearing force between the cement sheath and a stratum test sample. According to the invention, because the adopted casing pipe test sample has the same size and the material with the casing pipe material applied in the practical well cementation, the adopted stratum test sample is a standard artificial stratum test sample, the porosity-permeability characteristic, the strength characteristic, and the fluid characteristic and the like of the adopted stratum test sample are same with the stratum characteristic in the practical well, the invention can be used for truly simulating the dynamic variation of full-size well cementation, and the simulation condition is accurate. The invention can be widely applied in simulation experiments of various well-cementation dynamic variations.

The invention discloses a preparation method for the silica sol with a high evenness degree, belonging to the technical field of electronic manufacturing and SiO2 sol preparation. Under an ultrasonic influence, a silica sol seed solution is prepared and a reaction material is added to the silica sol solution in batches; aqueous solution and metallic silicon powder that serve as basic catalysts are chosen as the reaction material for each batch, and the basic catalyst in each batch is 2-40% of the basic catalyst previously added into the silica sol seed solution, and the metallic silicon powder in each batch is 2-40% of the metallic silicon powder previously added in the silica sol seed solution. After the reaction finishes, the unreacted metallic silicon powder is removed, and the SiO2 sol is produced. The ultrasonic sound adopted for the invention ranges from 20 to 50 kHz. By adopting the invention, production costs can be reduced and product purity is improved. In addition, the method disclosed by the invention has the advantages of safe technical process, simple equipment, and is easy to operate as well as is economic and has high efficiency.

The invention discloses a dynamic deformation characteristic testing method in a coal absorption and desorption process. The method comprises the following steps: (1) measuring empty volumes of a high-pressure air accumulation bottle and a high-pressure absorption and desorption tank; (2) mounting samples; (3) measuring the free space volume of the absorption and desorption tank; (4) implementing the dynamic coal evolutionary process test in a gas isothermal constant-volume absorption process; (5) implementing the dynamic coal evolutionary process test in a gas isothermal constant-pressure absorption process; (6) implementing the absorption-desorption dynamic evolution process test under the gas constant-volume and variable-temperature condition; (7) implementing the dynamic coal evolutionary process test in a gas competitive absorption process; and (8) implementing the dynamic coal evolutionary process test in a gas desorption process. The method is easy to operate; and the accuracy of test results is high.

The exploration and development of unconventional oil-gas reservoirs, especially the dense gas-oil reservoir, has become a bright spot of the oil exploration and development in recent years and a mainbattlefield of the future oil exploration and development. The wettability is one of important parameters for knowing dense oil-gas reservoir characteristics, and an operation of effectively determining the rock wettability has important significance for researching recovery percent of the oil reservoir, an oil-water ratio after water channeling, recovery ratio improvement and residual oil saturation. The invention discloses a new method for dense rock wettability determination, the disadvantages that the traditional self-absorption metering is inaccurate and nuclear magnetic resonance oil-water signals are hard to distinguish are overcome, a nuclear magnetic signal of the water is shielded by effectively utilizing manganese chloride, the self-water-absorbing oil discharge amount, water-driving oil amount, self-oil-absorbing water discharge amount and oil-driving water amount are accurately acquired by combining T2 spectral curve of the rock and weighing and weight change characteristics thereof, and the effective determination of the dense rock wettability is realized. The new method disclosed by the invention has the advantages of being small in current personal factor influence, high in data reliability, and simple and convenient.

This invention relates to a method for producing non-isocyanate polyurethane using renewable natural resources, comprising: add epoxy soybean oil and catalyst into the reactor, wherein the amount of catalyst added is 3-5mol% of epoxy soybean oil, and then aerate in carbon dioxide gas, with reaction temperature 100-140Deg C, and reaction pressure 6-14 atmospheric pressure, start the reaction with magnetic stirring . for 25-40h. The produced cyclic carbonates are mixed with amine at 70-80Deg C, perform flaking at 100-110Deg C for 7-8h, perform sulfidization at 90-110Deg C for 24-72h, and are placed at room temperature for 7-9d. This invention synthesizes non-isocyanate polyurethane by replacing petrochemical products with epoxy soybean oil and CO2 via two-step reactions, forming a green, clean, high efficient and simple line for producing non-isocyanate polyurethane.

The invention provides a method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension, comprising following steps: a), building a fracture-cave body; b), mounting a jig of an integrated test piece, and placing an assembled artificial material in the jig; c), applying set constant three-way confining pressure to the test piece; d), injecting a liquid into the fracture-cave body through a fracture-cave body liquid injection line at constant flow to a designed pressure, and switching a hydraulic pump to a constant pressure state to keep the inner pressure of the fracture-cave body unchanged; e), injecting fracturing liquid into a simulation shaft through a fracturing liquid injection line, and stopping injection after a hydraulic fracture extends to the designed size; removing the test piece from a test rack, and dissecting the test piece to observe the fracture form. The method enables a carbonate rock reservoir hydraulic fracturing simulation test to be carried under laboratory conditions and the impact of the high-pressure fracture-cave body upon hydraulic fracture extension.

The invention provides a simulated experiment method of overheat faults of a contact surface in sulfur hexafluoride gas insulation equipment, belonging to the technical field of online monitoring of an insulation state of the SF6 gas insulation equipment. The method provided by the invention utilizes a 'simulation device of the overheat faults of the contact surface in the sulfur hexafluoride gas insulation equipment' applied by the applicant to carry out simulated experiment on the overheat faults of the contact surface in the SF6 gas insulation equipment. According to the method provided by the invention, the overheat faults of the contact surface in the SF6 gas insulation equipment can be simulated and the method has the characteristics of high simulation accuracy, high detection precision, simple experiment method, safety, easiness of mastering, convenience for popularization and application and the like. The simulated experiment method can be widely applied to simulating the overheat faults in the SF6 gas insulation equipment and particularly simulating the overheat faults of the contact surface in the SF6 gas insulation equipment.

The invention discloses a composite material used as a lithium air battery positive electrode and a preparation method thereof. The composite material comprises nanometer manganese dioxide (MnO2) and porous carbon which are compounded on the molecular level and are bonded by a hydrogen bond; and the molar ratio of the porous carbon to the nanometer MnO2 is 10:1 to 20:1. The porous carbon is uniform in aperture and large in specific surface area; the nanometer MnO2 is low in cost, non-toxic, high in average voltage and energy compatibility and extremely high in catalytic activity; and moreover, overpotential can be effectively reduced. The nanometer MnO2 used as a catalyst is deposited on the surface of the porous carbon material by a hydrothermal method or an oxidation-reduction method, so that precious metal salt is avoided, the cost is low, the practicability is high, the composite material is clean and environment-friendly, and the requirement on environment protection is met; and in addition, the method is simple and feasible, and complicated and harsh reaction conditions and side reaction are avoided.

The invention discloses a non-cutting energy obtaining method for a main transmission system of a numerically controlled lathe. A power and energy consumption value in main shaft idle operation and main shaft acceleration can be calculated according to an established main shaft idle operation and main shaft acceleration power and an energy consumption model, and coefficient values (which are obtained through experiments) of a main transmission system frequency converter, a main shaft motor no-load power Poe, a main shaft idle operation friction torque Tf, a main transmission system rotational inertia Jtot, a main shaft angle acceleration alpha and other models. The invention provides a method for obtaining relevant coefficients through the experiments; and the method comprises the steps of: obtaining the coefficients Poe and Tf through regression analysis on main shaft idle operation power data, and obtaining the coefficients Jtot and alpha through the analysis on the data such as main shaft starting power and time. The method can be used for machine tool use environment influence evaluation, mechanical machining process energy consumption calculation, machine tool and process selection based on the minimum energy consumption; and the successful execution on energy conservation and consumption reduction during mechanical manufacturing is promoted smoothly.

SiO2@TiO2 nuclear shell structure with stable dispersion and controllable photocatalysis preparing method, comprises the steps of 1, adding TiO2 to distilled water to get suspension with concentration of 100-500 g / L, adding 0.1%-0.5% (NaPO3)6 as dispersing agent, and mixing it for 0. 5- 2h; 2, heating the solution obtained from step 1 to 60- 100oC, adding sodium silicate solution and sulfuric acid solution for mixing, to make the molar ratio of sodium silicate and titanium dioxide be 1:(5-45) and reaction system's pH be 8-11, after reaction for 1-3h and ageing for 1.5- 3h at room temperature, using distilled water to clean until the conductivity is less than 20 mS / m, to get SiO2@TiO2 suspension; or drying SiO2@TiO2 suspension at 100-110 oC for at least 24h and grinding it to get SiO2@TiO2 powder.

The invention discloses a method for inducing human umbilical cord mesenchymal stem cells in vitro into liver cells and application thereof. The method comprises the following steps of: at the culture logarithmic growth phase of human umbilical cord mesenchymal stem cells, adding a liver cell induced differentiation culture medium and performing differentiated induction to obtain the liver cells formed by the differentiation of the human umbilical cord mesenchymal stem cells. The liver cell induced differentiation culture medium consists of the basic culture medium is an IMDM culture medium containing 10 to 70 ng / ml of liver cell growth factor, 3 to 30 ng / ml of fibroblast growth factor, 4.5 to 50 ng / ml of oncostatin, 2 to 40 ng / ml of alkali fibroblast growth factor, 20 ng / ml of epidermal growth factor, 1 mu M of dexamethasone and 50 mg / ml of ITS+premix. The method has the characteristics of one step method, simplicity, high repeatability, short duration time of differentiation process and good induced differentiation effect. The method can be applied to the research on turning mesenchymal stem cells into liver cells by induced differentiation.

The invention discloses a rolling bearing stiffness testing experiment device and an experiment method thereof. The experiment device comprises a hydraulic initial pre-tightening module, a piezoelectric actuator pre-tightening force adjustment module and a frequency response function testing module. The hydraulic initial pre-tightening module comprises a hydraulic system, a hydraulic cylinder, a tension sensor, a tension display and a spindle; the piezoelectric actuator pre-tightening force adjustment module comprises a plurality of first pressure sensors, a plurality of piezoelectric actuators, an actuator hole seat, a rolling bearing, an end cap and a bearing seat; the frequency response function testing module comprises a plurality of acceleration sensors, a plurality of second pressure sensors, a plurality of vibration exciters, a data acquisition instrument, a computer and a signal generator. According to the experiment method, a mode of implementing combined pre-tightening to the rolling bearing is adopted, and stiffness of the rolling bearing is calculated in the frequency response function testing module. By the rolling bearing stiffness testing experiment device, dynamic test on the stiffness of the rolling bearing is realized through accurate adjustment of pre-tightening force of the rolling bearing.

The invention provides a method for testing the content of magnesium oxide in a magnesium oxide expanding agent. The method comprises the steps of: enabling a magnesium oxide expanding agent sample to react in a buffer solution with the pH value of 13.0, and detecting the content of the magnesium oxide in the magnesium oxide expanding agent sample, wherein a sodium hydroxide aqueous solution is used as the buffer solution. According to the invention, the influence of a magnesium element in undecomposed magnesite and the magnesium element in generated magnesium hydrate partially absorbing moisture in the magnesium oxide expanding agent can be eliminated, the influence of the calcium oxide in the magnesium oxide expanding agent can be effectively eliminated, and the measured content of the magnesium oxide is the effective content of the magnesium oxide capable of reacting with water; and a test result is capable of truly reflecting the reaction capacity of the magnesium oxide expanding agent in a cement concrete hydration environment, and is closely related to the expansion priority of the magnetism oxide expanding agent in cement concrete.

The invention provides an experimental platform for simulating ocean platform motion compensation and an experimental method thereof. The experimental platform is characterized by comprising a motion simulation platform, a motion compensation platform on the motion simulation platform, and a data acquisition processing and control device, wherein the motion simulation platform is a six-degrees-of-freedom parallel mechanism, the motion compensation platform is a three-degrees-of-freedom parallel mechanism, and the data acquisition processing and control device includes an attitude sensor arranged on the motion simulation platform, a PAC and a computer. The motion simulation platform is preferably a 6-SPS Stewart parallel mechanism or a 6-UPS Stewart parallel mechanism. The motion compensation platform is preferably a 3-SPS parallel mechanism, a 3-UPU parallel mechanism or a 3-RPS parallel mechanism. The experimental cost can be reduced, and the hidden danger of experiment on an ocean platform or ship can be eliminated. The experimental method of the invention is simple, easy to operate, and efficient.

The present invention discloses the measurement method of elastic modulus and strength of fragile coating. Based on the variation of beam sample before and after coating in bending deflection under bending load, the formula of f2.I=f1.I1 for the deformation of the sample before and after coating under the same load, equivalent cross theory of composite beam in material mechanics and three-point bending formula, the inertia moment of the coated beam sample, further the ratio between the coating elastic modulus and the substrate elastic modulus, the ratio between deflection values before and after coating and the elastic modulus of the coating are found out. Then, through determining the elastic modulus of the substrate and the coating and calculating the stress distribution along the thickness direction, the maximum surface stress corresponding to the coating cracking as the strength of the coating is found out. The present invention can evaluate the elastic modulus and breaking strength of fragile coating simultaneously.

The invention relates to a method for testing the heat resistance of a radiator, which comprises the following steps of: (1) arranging a heat source at the bottom of the radiator to be tested and temperature acquisition points in and above the bottom center of the radiator simultaneously, and measuring the temperature T1 of the radiator before the radiator is heated; (2) heating the radiator and timing (in a step 300); (3) continuously heating the radiator until the temperature in the bottom center of the radiator reaches T2 which is slightly higher than the node temperature of a power device using the radiator, measuring and recording T2 and a test point temperature Tdet, and recording heating time t; and (4) respectively substituting the numerical values into a formula, and calculating the heat resistance of the radiator to be tested, wherein C is the specific heat capacity of the radiator, and m is the mass of the radiator. By the heat resistance testing method, an experiment method is simplified, the requirement on the heat source and power thereof is low, testing cost is reduced, the heating efficiency of the heat source is not required to be estimated, and the accuracy of an experiment result is improved.

The invention relates to a preparation method of a non-ironing finishing agent of a modified self-crosslinking organosilicon anti-wrinkle microemulsion. At present, the non-ironing finishing agent with good performance does not exist. The preparation method comprises a process of preparing amino-modified silicone crude oil and a process of preparing an emulsion finishing agent; the process of preparing the amino-modified silicone crude oil comprises the steps of: mixing amino-modified silicone oil and a solvent, dripping epoxy chloropropane, heating the mixed liquor to a temperature of 40-60DEG C, preserving the temperature to react for 2-4h, and cooling to a temperature of 15-25DEG C to obtain the amino-modified silicone crude oil, wherein the proportion of the amino-modified silicone oil to the solvent to the epoxy chloropropane by weight is 1: (1-1.5): 0.09252X, and X is 0.3-0.9; and the process of preparing the emulsion finishing agent comprises the steps of: preparing the following materials in percentage by weight: 8-15% of fatty alcohol-polyoxyethylene ether, 0.2-0.3% of glacial acetic acid, 54.7-73.8% of water and 18-30% of amino-modified silicone crude oil, adding the fatty alcohol-polyoxyethylene ether in the modified amino-modified silicone crude oil to emulsify, and adding the glacial acetic acid and the water to obtain the product. The preparation method of the non-ironing finishing agent of the modified self-crosslinking organosilicon anti-wrinkle microemulsion is simple in process, easy for preparation and reliable in product performance.

The invention relates to a tissue-derived exosome extraction method and belongs to the technical field of biology. The tissue-derived exosome extraction method is used for extracting exosomes directly based on enzymatic lysis and includes the steps of firstly, cutting tissues mechanically and adding collagenase and Dnase for lysis; secondly, subjecting lysed mixed liquor to exosome operation by a PEG method. The tissue-derived exosome extraction method has the advantages that the tissue-derived exosome extraction method obtains the exosomes from the tissues directly for further studying, overcomes the difficulty in extracting the exosomes from the tissues directly and expands the field of exosome researches by extracting the exosomes by means of enzymolysis-filtration-centrifugation, thereby being of great significance to promoting the exosome researches.

The invention discloses a CuZn double-monatomic electrochemical catalysis CO2 reduction material and a preparation method thereof, and belongs to the field of composite material preparation. The electrochemical catalysis CO2 reduction material is composed of a reaction active matter and a carrier, CuZn double-monatoms are used as the reaction active matter, and nitrogen-doped carbon nanosheets areused as the carrier; the metals Cu and Zn exist in the form of single atoms and have the maximum atom utilization efficiency, so that the electrocatalytic material has relatively excellent catalyticactivity and selectivity, and the Faraday efficiency of a product ethanol is close to 50% within a relatively wide voltage test range (-0.8 to -1.3 V vs.RHE).

The invention discloses a pulsed eddy-current-based metal plate thickness information detection method. The method comprises the following steps of S1, testing the magnetic induction intensity Bair inthe air by means of a probe; S2, measuring the magnetic induction intensity Bref of a standard test piece of the same material as a tested piece and adopting the measured result as a reference signal; S3, detecting the test piece of the same standard material and obtaining a parameter (imgfile = 'DDA 00014861076800000000011.TIF 'wi = '155 'he = '70 '); S4, determining a constant C, and calculating a characteristic parameter KB value; S5, calculating the value of the frequency f of the corresponding KB value by calculating a formula of the characteristic parameter KB value and an additional formula in the step S4; S6, taking the frequency f, the constant C and the parameter (img file = 'DDA 00014861076800000000012. tif'wi = '131 'he = '70 ') into the formula, and calculating to obtain thethickness value h of the tested piece. By adopting the method, the eddy current accurate detection is realized through eddy current signal coupling and eddy current signal decoupling. Meanwhile, the experiment method is simplified, and the research timeliness is improved.

The invention discloses a coal deformation test device in a gas adsorption and desorption process. The coal deformation test device comprises a high-pressure adsorption and desorption tank, a gas control system and a deformation test system, wherein the high-pressure adsorption and desorption tank comprises a tank body and a top cover arranged on the tank body, the tank body and the top cover are buckled together through a fastening clamping hoop, the top cover comprises a base portion and a connector mounting portion which are integrated, and the connector mounting portion penetrates out of the fastening clamping hoop and is provided with a gas connector communicated with an inner cavity of the tank body, a gas pressure sensor connector and a stress-strain measurement connector. The gas control system comprises a high-pressure gas storage bottle, the outlet end of the high-pressure gas storage bottle is connected with a second gas pressure sensor which is connected with a sixth needle valve, the sixth needle valve is connected with the gas connector, and the inlet end of the high-pressure gas storage bottle is connected with a four-way connector. The deformation test system comprises a resistance strain gage, a resistance strain gauge, a comprehensive processing terminal and a pressure collecting card which are connected with one another. The coal deformation test device in the gas adsorption and desorption process is simple in operation and high in accuracy of test results.

The present invention belongs to the field of on-line monitoring technology of the insulation state of a sulfur hexafluoride (SF6) gas insulation electrical device, and specifically relates to a partial discharge decomposition simulation experiment method of a direct current gas insulation electrical device. The method mainly comprises a SF6 direct current PD decomposition experiment method and methods of pulse current detection and collection and analysis testing of discharge decomposition gas, etc. The method provided by the invention is simple, easy to grasp and convenient for popularization, is widely applicable to the simulation and monitoring of a SF6 gas insulation electrical device direct current PD, and provides a scientific and effective method for insulation state monitoring of a direct current gas insulation electrical device and the SP6 PD decomposition test and decomposition mechanism research.

The invention discloses a preparation method of cage-shaped TiO2-Fe2O3 composite hollow microspheres. The TiO2-Fe2O3 composite hollow microspheres having special morphologies and different dimensions are prepared through adopting carbon spheres prepared from glucose as templates, and adding ferric chloride and tetrabutyl titanate having different proportions at a low temperature. The preparation method has the advantages of simplicity, low reaction temperature, and environmental protection and no pollution in the synthetic process; and the synthesized hollow spheres are a novel gas and light sensitive material.

The invention discloses a preparation method of a peach-kernel-shaped SnO2-graphene-carbon composite material for a lithium ion battery. The preparation method comprises the steps: with tin salt as a raw material of the composite material and graphene oxide as a carrier, mixing tin salt and graphene oxide, then, carrying out ultrasonic treatment, stirring and spraying to prepare a precursor of the composite material; then, mixing the precursor and a carbon source solution, and next, carrying out hydrothermal treatment to prepare the composite material. The peach-kernel-shaped carbon-coated tin-based composite material prepared by using the method has the advantages that SnO2 particles are loaded on graphene, then, a carbon layer is coated outside the composite material, and the whole structure is shaped like a peach kernel and can be used for better constraining the volume change of tin dioxide particles, so that the material has more excellent cyclic performance.

The invention discloses a method for preparing graphene by peeling graphite in an electrochemical manner by using molten salt. The method is characterized by combining an electrochemical method and a solvent method. According to the method, molten salt is used as a peeling medium, and the peeling power is provided by migration of charge particles in the molten salt. According to the technical scheme, the method comprises the following three steps: (1) preparing mixing salt of aluminum chloride, sodium chloride and potassium chloride of appreciate ratio, heating to be 150 DEG C, and keeping the temperature; (2) respectively introducing appreciate current into graphite and an aluminum electrode for electrochemical peeling; and (3) separating the graphene which is obtained by peeling by using the molten salt. The method has the advantages that the graphene defects are small, the equipment requirements are small, the graphene can be rapidly and massively prepared, the industrialization is easy to achieve, and the like.

A method for detecting bio-available cadmium in soil includes steps: S100, sample collection and pretreatment, to be more specific, sampling soil, subjecting sampled soil to air drying at the room temperature, grinding, and filtering through a 200-mesh screen to obtain a soil sample; weighing 1-5g of the soil sample, adding into a 250mL polytetrafluoroethylene centrifugal cup, adding 25mL of 1mol / L ammonium chloride solution and 25mL of 80% ethanol solution, cleaning through an ultrasonic cleaner, centrifuging through a centrifuge, filtering supernatant through a filter membrane to obtain extract liquid, and adopting HNO3 solution in concentration of 1% to obtain a constant volume; S200, determination of the concentration of bio-available cadmium in the extract liquid, to be more specific,adopting an inductively coupled plasma source mass spectrometer for creating a standard curve for determining different concentrations of bio-available cadmium according to an inductively coupled plasma mass spectrometry method; adopting the inductively coupled plasma source mass spectrometer for measuring concentration of bio-available cadmium in the extract liquid according to the standard curve; S300, result analysis, to be more specific, calculating the content of bio-available cadmium in the soil sample according to measured soil sample mass and measured extract liquid concentration.

The invention provides an experimental method for in-situ observation of inclusions in bearing steel. A cylindrical sample is processed by wire-cutting the bearing steel sample. After evacuating the interior, a pure argon flow is introduced to protect the sample from oxidation. Quickly raise the temperature of the sample to 1150-1250°C, then slowly raise the sample until the sample melts, keep it at the highest temperature for 20-40s, observe the inclusion movement and collision behavior at high temperature, and then rapidly cool it to 900-1000°C , and finally slowly cooled to room temperature, after the sample is taken out, enter the electron microscope SEM to observe the shape of the inclusions and use the energy spectrum to analyze its composition. Rapid cooling can make the inclusions basically maintain the state at the steelmaking temperature. In situ observation of behavior, overall appearance, and composition.

The invention relates to a cobweb-like graphene coated beta-FeOOH nano-rod aggregate lithium ion battery negative electrode material preparation method, which comprises: dispersing graphene oxide in deionized water to obtain a suspension A; adding FeCl3.6H2O and NaNO3 into deionized water, and adding the obtained solution into the suspension A to obtain suspension B; pouring the suspension B intoa homogeneous phase hydrothermal reaction kettle, sealing the reaction kettle, placing the sealed reaction kettle into a homogeneous phase hydrothermal reaction instrument, and carrying out a reactionto obtain a product C; washing the product C respectively with water and alcohol, and dispersing the washed product in water to obtain a product D; and carrying out freeze drying on the product D toobtain the cobweb-like graphene coated beta-FeOOH nano-rod aggregate lithium ion battery negative electrode material. According to the present invention, the performance of beta-FeOOH is improved by compounding the graphene with the special structure, wherein graphene has advantages of good conductivity and large specific surface area, such that the poor conductivity of beta-FeOOH can be effectively solved by coating the beta-FeOOH with the special cobweb-like graphene while the volume expansion can be inhibited to achieve the stable battery structure so as to improve the cycle stability of the battery.

The invention discloses a method for catalyzing and synthesizing adamantane which is generated by bridge tetrahydro Dicyclopentadiene in two steps of catalytic isomerization; adamantane is generated by bridge tetrahydro Dicyclopentadiene as raw material and any of aluminium choride, aluminium tribromide, or ferric trichloride as a catalyst under a normal pressure, a certain temperature, and a certain reaction time. The method is characterized in that the reaction is accomplished in two steps; in the first step, any of methanol, ethanol, normal propyl alcohol, isopropanol, methyl ethyl ketone, acetone, acetic acid, halogenated hydrocarbon, and tetrahydrofuran is used as solvent; in the second step, a certain amount of main catalyst is added, and any of sodium carbonate, sodium chloride or sodium bicarbonate is added as a cocatalyst, thus generating the adamantane under a certain reaction temperature. The method is simple and convenient; the operation is convenient; the yield coefficient is high; and the cost is low. Through a suitably chosen catalyst system, the purity of the adamantane obtained with the method is higher than 99 percent; and the yield coefficient is higher than 60 percent.

The invention relates to an experimental device and an experimental method for determining the soil respiration action in a drying process. The experimental device comprises a base plate, a transparent sealing cover, a silica gel drier, and a CO2 absorption bottle, and the transparent sealing cover is covered on the base plate; the center of the upper surface of the transparent sealing cover is provided with an air pumping / discharging port; the silica gel drier is suspended below the air pumping / discharging port; and the CO2 absorption bottle is arranged near the side of the base plate. The experimental method comprises the following steps of: placing experimental soil on the base plate, and filling a NaOH solution in the CO2 absorption bottle; covering the transparent sealing cover, and pumping by using a manual air pump; dripping a BaCl2 solution into the CO2 absorption bottle by using a pinhole injector; quickly taking the fixed absorption liquid and filtering, and dripping the unreacted NaOH solution by using HCL and taking phenolphthalein as an indicator; and calculating the amount of CO2 produced under the soil respiration action according to the amount of the reacted NaOH. The experimental method is easy and practicable, reduces equipment cost and is more suitable for small-scale test research of a laboratory.