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 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 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.

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 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 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 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.

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 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.