249 results about "Rheometer" patented technology

The invention discloses a multi-physics coupling viscosity calibration method for a large and heavy hydrostatic pressure rotating table, and belongs to the technical field of fluid mechanics modeling and high-end equipment manufacturing. According to the calibration method, a temperature control / high-pressure rotational rheometer is adopted to obtain experimental data, and experimental verification shows that the average prediction error of the model under the ultrahigh pressure (1000 MPa) and the wide temperature range (20-80 DEG C) is controlled within 10%, and the model is remarkably superior to traditional Arrhenius and Barus models (the error is 40% or above). Theoretical support is provided for oil film dynamic characteristics, bearing capacity optimization and real-time control of a large and heavy hydrostatic pressure system, and the method is suitable for various lubricating media such as mineral oil, synthetic oil and nanofluid and can be widely applied to precision machining and intelligent control in the field of high-end equipment manufacturing.

The invention relates to the technical field of rock mass engineering, in particular to a soft rock structural surface permeation grouting evolution analysis method which comprises the following steps: performing a steady-state shear thinning inversion test on target slurry by using a rotational rheometer to obtain slurry performance parameters; a permeation grouting displacement test is conducted on the soft rock structural surface, and grouting parameters in the grouting process are obtained; determining grouting main section parameters of the soft rock structural surface, and constructing a grouting diffusion numerical value prediction model based on the grouting main section parameters; based on the slurry performance parameters, the grouting parameters and the grouting diffusion numerical value prediction model, establishing a simulation model of the target slurry; and performing test-simulation parameter comparison on the permeation grouting displacement test and the simulation model, and determining a grouting evolution characterization model for analyzing grouting flow pattern evolution and diffusion fluidization. According to the method, the accurate simulation model and the grouting evolution characterization model are established and optimized by combining actual measurement parameters in the test, so that the grouting process is optimized, and the engineering safety and economy are improved.

The present invention relates to a colloidal composition comprising unmodified, discrete cellulose microparticles, such as a colloidal emulsion or colloidal gel, a method of preparing the colloidal composition and uses of the colloidal composition and cellulose particles The colloidal composition comprises a continuous phase and a dispersed phase, wherein the continuous phase is a liquid; wherein the dispersed phase comprises cellulose microparticles which are dispersed in the continuous phase of the colloidal composition, wherein the cellulose microparticles have a mean average particle length of from 0.1 to 20 µm a mean average particle width from 0.05 to 1.3 µm, and a maximum thickness not exceeding 0.2 µm determined by scanning electron microscopy; and an aspect ratio of length / width of 1 to 25, and wherein the colloidal composition has a flow index n of ≤ 1 determined by a rheometer at NTP (normal temperature (25°C) and pressure (1 atm)).

The invention discloses conductive silver paste for a solar cell and application of the conductive silver paste, and belongs to the technical field of conductive silver paste. According to the invention, the prepared silver paste is printed on a silicon wafer cell in a silk-screen printing manner, so that the good rheological property of printing can be obtained. And a rheometer is introduced for testing, and an SEM scanning electron microscope is introduced for checking the surface appearance of the silver grid line. The invention discloses a TOPCon silicon wafer for a silicon solar cell, which comprises the following components in percentage by weight: 82-90% of silver powder, 20-30% of glass powder and 20-30% of organic carrier. 2-5% of glass powder; and 8-13% of an organic carrier. The conductive silver paste with good rheological property is prepared by using a mixture of polyamide wax and hydrogenated castor oil in a mass ratio of 1: 1 as a thixotropic agent. The main grid silver paste for the silicon solar cell provided by the invention can be well matched with step-by-step printing of a cell piece, different proportions of the binder and the thixotropic agent are used, the photoelectric conversion efficiency is high, the peeling strength of the main grid is high, and the step-by-step printing main grid paste requirements of current different types of paste and cell pieces can be well met.

The invention provides a thixotropy quantitative characterization method of lithium slag-tailings cemented filling slurry, and relates to the technical field of metal ore remaining tailings and lithium slag treatment. Comprising the following steps: preparing to-be-tested slurry and setting test parameters; starting a rheometer to test the to-be-tested slurry to obtain multi-stage thixotropic data of the to-be-tested slurry; according to the multi-stage thixotropic data, constructing a curve of the apparent viscosity changing along with the test time; carrying out data fitting on the curve by adopting a thixotropic quantitative characterization method so as to obtain specific fitting parameters and a flocculation rate; calculating the thixotropy of the slurry by using a structural recovery rate formula; and analyzing and characterizing the thixotropy of the slurry by using the obtained structure recovery rate and flocculation rate to obtain a characterization result. The problem that in the prior art, the thixotropy experiment result is low in accuracy is solved.

The invention discloses a rheology-birefringence combined in-situ testing device and method based on chopper rotation frequency signals, belongs to the technical field of optical testing, and aims to solve the technical problems that an existing Spark-FB device is low in measurement accuracy and limits application scenes. The laser emitter emits a light beam along a set angle (forming an angle of 45 degrees with the horizontal plane), the light beam is converted into linearly polarized light through the polarizer, and an optical signal is modulated through the rotating chopper; the modulated light beam penetrates through a polymer sample to which a shear flow field is applied by a commercial rheometer, and transmission light carrying optical anisotropy information of the sample sequentially passes through a 1 / 4 wave plate and a polarization analyzer, and is finally received by a photoelectric detector and transmitted to a lock-in amplifier for analysis. According to the invention, an independent datum reference signal is provided through the chopper, decoupling and combination of a commercial rheometer and a birefringence light path are realized, and synchronous and accurate in-situ measurement of rheological and optical properties of a high polymer material under a deformation condition can be realized.

The invention relates to the technical field of polymer composite films, and particularly discloses a high-heat-resistance PFA / PTFE composite film and a preparation method thereof. The preparation method comprises the following steps: carrying out ball milling on polytetrafluoroethylene (PTFE), a modifier and a wetting agent at room temperature to obtain modified PTFE; then adding the modified PTFE and fusible polytetrafluoroethylene (PFA) granules into a torque rheometer for blending, extruding at the temperature of 350-380 DEG C and the rotating speed of 100-150rpm, and driving polytetrafluoroethylene fibrillated fragments and a PFA melt to generate semi-molten entanglement in a high shear field, so that the polytetrafluoroethylene and the PFA form a mutual coating structure, chain segment slippage is effectively inhibited, and split-phase crystallization is eliminated; and finally, carrying out hot pressing to prepare the PFA / PTFE composite film. The preparation method eliminates macroscopic phase separation, keeps the stability of mechanical properties while improving the heat resistance of the material, and is suitable for manufacturing high-reliability cable insulation and nuclear-grade sealing elements.

The invention relates to a method for coating a compacted powder cake, in particular for producing a capsule containing beverage powder. The method comprises the following steps: a) providing a compacted powder cake made of a powder containing at least one polysaccharide, b) providing a coating solution made of at least one polysaccharide for coating the compacted powder cake, c) applying the highly viscous coating solution to the compacted powder cake, and d) drying the coated compacted powder cake. The coating solution has a viscosity of between at least 400 mPas and at most 4000 mPas, preferably between 600 and 2500 mPas and particularly preferably between 800 and 1500 mPas, measured using a rheometer. The invention also relates to a capsule for preparing beverages.

The invention relates to the technical field of spraying processes, and discloses an accurate oil distribution method and system for matte spraying, and the method comprises the steps: collecting data through a spectrum analyzer, a color difference meter and an environment temperature and humidity sensor, carrying out the dimension reduction of high-dimensional data to construct a spectral feature vector, and predicting an initial oil distribution ratio through a multi-layer perceptron model; a spraying process rheological characteristic coupling model is constructed based on a measurement result of a dynamic rheometer, oil distribution and spraying parameters are optimized by adopting an improved particle swarm optimization algorithm, and finally, real-time feedback control is realized through a fuzzy PID (Proportion Integration Differentiation) controller. The system comprises a data acquisition module, an oil distribution prediction module, a coupling modeling module, an optimization module and a real-time control module, and all the modules work cooperatively to achieve full-process automation. According to the invention, the precision of matte spraying oil distribution is improved, the environmental adaptability is enhanced, the process synergy is optimized, and the product quality stability and the production efficiency are improved.

The invention relates to a powder preparation for beverages comprising a leguminous protein extract, wherein the leguminous protein extract has a protein content, expressed on dry weight basis of the extract, of 75% or higher, a dry matter ranging from 90 to 100%, wherein the protein extract has a Turbiscan Stability Index TSI at the Middle Region TSIMR below 5.0 and a rheometer viscosity going from 0.40 to 0.75 Pa.s, the viscosity being determined at 20°C, with a shear rate of 40s-1, on an aqueous suspension having 15% weight of dry matter.

The invention discloses a high-throughput automatic structure-streaming imaging method and device, and belongs to the technical field of biomedical engineering.The device comprises an imaging detection module used for achieving imaging detection of a printing model, the imaging detection module is provided with two combined optical paths of optical coherence tomography, fluorescence microscopic imaging or confocal microscopic imaging; and the data support module is used for realizing hydrogel interface microscopic observation under rheological loading, and the data support module is integrated with a rheometer based on a combined optical path of optical coherence tomography and fluorescence microscopic imaging. The OCT and FM combined common-path multi-mode imaging system is integrated with the rheometer and the cooperative control module, and a three-dimensional quantitative characterization method of parameters such as space collapse degree is combined, so that synchronous observation and accurate analysis of a microscopic-macroscopic structure and stress-strain are realized.

The invention relates to the field of flow-state solidified soil testing devices, and particularly discloses construction equipment and a construction process for scouring and repairing flow-state solidified soil for an offshore wind turbine foundation. Comprising an overwater carrying carrier, and a material mixing pool, a water adding stirring pool, a material conveying pipeline, a material conveying pump, a slurry conveying mechanism, a flow state solidified soil scouring performance testing device, a solidified soil rotational rheometer, a fluidity test bed, a detection material taking mechanism and a control center which are arranged on the carrier. The construction device is a complete technical system covering performance integrated testing, site construction real-time detection and complex environment coupling simulation, the dual problems that research and development of a flow-state solidified soil material is lagged and site repair quality control is insufficient are effectively solved, and the safety and reliability of offshore wind turbine foundation scouring repair engineering are guaranteed.

The utility model discloses a magnetic field liquid pressure difference sealing performance-rheological property synchronous measurement system which comprises a rheometer main body, a sealing rotor structure, a pneumatic pressurizing device, a temperature control and measurement device and a computer measurement and control device, the pneumatic pressurizing device comprises a constant pressure pump and a gas storage bottle, and is connected with the sealing rotor structure through a vent hole in the shell; the temperature control and measurement device comprises a temperature controller and a temperature control execution module which is arranged on the side wall of an outer cylinder at one end, close to the magnetic liquid area, of the magnetic function unit; the computer measurement and control device is connected with the optical encoder, the pressure sensor, the temperature controller and the torque control type motor. The system can simulate and test the sealing effect and rheological property of the magnetic liquid in a static state and a dynamic state, explores the actual influence of the magnetic liquid on the sealing property when the magnetic liquid flows, and supports the rheological test under the condition of multi-field coupling of a flow field, a magnetic field and a temperature field.

The purpose of the present invention is to provide a prepreg which uses a resin composition that can be cured in a short period of time and is capable of suppressing resin flow during molding, and which has high workability. A prepreg characterized in that the prepreg contains an epoxy resin composition and reinforcing fibers, the epoxy resin composition containing component (A): a urea compound; component (B): a thermoplastic resin; component (C): an epoxy resin having an oxazolidinone structure; and component (D): a bisphenol epoxy resin that is solid at 25 DEG C, and satisfies the following conditions (1) and (2). Condition (1): The minimum viscosity of the epoxy resin composition measured by a rheometer under the condition of 2 DEG C / min is in the range of 3.0-6.0 Pa.s. Condition (2): the gelation time value of the epoxy resin composition, as measured under the condition of 145 DEG C by CURELASTOMETER (Registered Trademark), is in the range of 2.0-5.0 min.

This invention relates to the field of coating performance testing technology, and more particularly to a testing method and evaluation system for the leveling and sagging properties of coatings. The coating is taken as a sample and tested in a rheometer: shear forces of a first low shear rate, a high shear rate, and a second low shear rate are sequentially applied to the coating, and the viscosity value of the coating over time is measured to obtain a shear rate-viscosity data curve; the recovery index RI is obtained from this curve; the viscosity value corresponding to 1 / n of the total time required from the start of the second low shear rate treatment to viscosity stabilization is obtained from the shear rate-viscosity data curve, and the viscosity value at the first low shear rate is calculated, and the ratio is used to obtain the stage recovery index RI. 1 / n The method of this invention can simultaneously measure the shear rate-viscosity data curves of multiple coatings, and can quickly and qualitatively evaluate the leveling and sagging properties of coatings at different thicknesses.

The invention provides a composite film material which is prepared by the following steps: adding polybutylene terephthalate adipate, a lignin carbohydrate complex and thermoplastic starch into a Haake rheometer according to a certain proportion, carrying out melt blending until the torque is balanced, and carrying out hot-pressing film formation in a press vulcanizer. The film material disclosed by the invention has good mechanical strength and easy-to-degrade performance, relatively high light transmittance and good hydrophobicity, and is completely suitable for the fields of environment-friendly films, mulching films or biodegradable packaging materials and the like. Besides, the preparation method of the film material is simple in process and low in cost, an organic solvent and a plasticizer do not need to be added in the preparation process, a biomass material is used as a filler, and meanwhile the purposes of efficient utilization of biomass resources and environmental friendliness are achieved.

A resin film (100) having a core layer (2) and adhesive resin layers (1) respectively disposed on both sides of the core layer (2), the adhesive resin layers (1) being formed of an adhesive resin composition having a minimum viscosity of 500 Pa·s or more at a temperature of 40°C to 160°C as measured by a rheometer.

This invention provides a measuring device. The measuring device includes: a base with a working surface; a positioning structure movably disposed on the working surface, the positioning structure having a bearing end and a receiving end, the receiving end having a receiving recess; and a measuring structure disposed on the base. The positioning structure has a reference state and a positioning state. When the positioning structure is in the reference state, the end face of the receiving end is in contact with the working surface, and the measuring structure measures the height between the end face of the bearing end and the working surface. When the positioning structure is in the positioning state, the end face of the bearing end is in contact with the working surface, the receiving recess accommodates the non-measuring segment of the sample to be measured, the end face of the receiving end is in contact with the end face of the segment to be measured near the working surface, and the measuring structure measures the height between the end face of the segment to be measured away from the working surface and the working surface. This invention effectively solves the problem of poor efficiency in measuring the sample thickness of a rotational rheometer by operators in the prior art.

The invention concerns a printable composition comprising: i) at least 18 wt.% photo polymerization reactive compound (M) provided by a secondary acryl amide of the structure type H2C=CH-CO-NH-R1, with R1 represented by an organic residue, ii) photo polymerization reactive organic compound (N) which is different from (M) with the proviso that: all species of the reactive organic compound (N) have a viscosity of maximum 50 mPa s at 25 °C (measured according to DIN EN ISO 3219-2, August 2021, with the proviso that: use of rotational rheometer in cone-plate geometry: cone diameter 60 mm, zero-gap distance 0.061 mm, cone angle 0.5 °; use of active thermal cover and heat plate; use of shear-rate of 600 s-1; general temperature measurement range 25-70 °C) and iii) radical photo initiator (R), where the wt.% ratio of contained (N) to contained (M) is at least 1.3 and the wt.% is relative to the total weight of the composition.

This utility model belongs to the field of oil and gas extraction technology, and discloses a measuring device and a rotational rheometer for detecting the salt resistance of crosslinking agents. The measuring device for detecting the salt resistance of crosslinking agents includes a housing, a cover, a rotating assembly, and a liquid injection assembly. The housing is fitted into a supporting groove and has a communicating receiving chamber and a liquid injection channel, the liquid injection channel being located on the side wall of the housing. The cover is detachably fastened to the housing and has a through hole. The rotating assembly is located in the receiving chamber, and one end is rotatably mounted vertically in the through hole. The rotating assembly is connected to the output end of the rotational drive mechanism of the rotational rheometer. The liquid injection assembly includes a storage container, a liquid injection pipeline, and a liquid injection mechanism. One end of the liquid injection pipeline is connected to the storage container, and the other end is connected to the liquid injection channel. The storage container is used to store brine, and the liquid injection mechanism is located on the liquid injection pipeline. Using this measuring device to detect fracturing fluids can reduce the workload of workers and improve work efficiency.

The invention provides a silica aerogel modified PVDF / FKM thermoplastic elastomer and a preparation method thereof, specifically, silica aerogel is pretreated with a coupling agent KH570, ultraviolet light modification is performed, the silica aerogel is used for preparing modified fluororubber (FKM), and finally PVDF and the modified FKM are prepared into the PVDF / FKM thermoplastic elastomer in a torque rheometer. Performance testing is carried out on the PVDF / FKM thermoplastic elastomer, and results show that the crosslinking degree of the FKM is favorably improved through ultraviolet light treatment, the crosslinking degree of the FKM treated for 20 minutes is the maximum, the S '(MH) value is 20.56 dN.m, the tensile strength of the PVDF / FKM thermoplastic elastomer is the maximum and 24.5 MPa when the use amount of KH570 is 3%, and a positive correlation relation exists between the tensile strength and a torque value; and the heat conductivity coefficient of the elastomer modified by ultraviolet light is obviously reduced. The material can be used for corrosion-resistant cables and the like.

The invention discloses a method for quickly determining the optimal addition amount of a battery slurry adhesive, which comprises the following steps: taking out a plurality of samples in the process of stirring and dispersing slurry; sequentially pouring the samples onto a rotational rheology tester; the test distance of the rotational rheology tester is set to be 0.8 mm, the temperature is set to be 20 DEG C + / -1, the deformation quantity is set to be within a viscoelastic interval range, the frequency scanning interval is 0.01 Hz-100 Hz, a point is taken as log (points are taken in order of magnitude distribution of 10), and the number of steps is 6; the rotational rheology tester is used for testing to obtain a frequency scanning graph of the slurry, and whether the adding proportion of the binder is reasonable or not is judged by judging the frequency interval of the intersection point of the energy storage modulus and the loss modulus. According to the method for rapidly determining the optimal addition amount of the battery slurry adhesive, whether the slurry ratio is appropriate or not can be tested in real time, the ratio of the adhesive can be synchronously adjusted on line, and the method is suitable for characterization of the battery slurry which is a complex dispersion system.

The invention discloses an automotive flame-retardant polypropylene composite material and a preparation method thereof, relates to synthesis of cerium oxide and modification of a polymer composite material, and belongs to the field of flame retardance. The flame-retardant polypropylene composite material for the vehicle comprises the following raw materials in percentage by mass: 1-2% of cerium oxide, 16-30% of piperazine pyrophosphate and 68-82% of polypropylene, the cerium oxide is prepared by a liquid phase deposition-hydrothermal synthesis method, and the preparation method comprises the following steps: respectively drying the cerium oxide, the piperazine pyrophosphate and the polypropylene; and premixing the dried cerium oxide, piperazine pyrophosphate and polypropylene, putting into a torque rheometer, and carrying out melt blending to obtain the composite material. The flame retardant property of the material is improved while the mechanical property of the material is ensured.

A precision coating composition that includes organic solvents and film-forming constituents, where the coating composition has a shear thinning rheological profile; and where under a shear rate of 0.1 s−1, the coating composition has a viscosity of from 1,000 cps to 30,000 cps measured using an Anton Paar MCR 301 or Anton Paar MCR 302 rheometer with a Double Gap Cylinder equipped with a DG26.7 measuring system at 25° C. The precision coating composition can be applied to a substrate using a precision applicator to form a coating layer over at least a portion of a substrate; and exposing the coating layer to a sufficient amount of energy for a sufficient amount of time for the coating layer to coalesce to form a uniform coating on the substrate, where the amount of energy does not cause an appreciable cure of the precision coating composition.

The present invention pertains to a multi-part cosmetic composition which has both a physical property providing good adhesion for preventing dripping during mixing at the time of use and during application to keratin tissues such as skin and hair, and a physical property providing ease of spreading after application.　The present invention provides a multi-part cosmetic composition which comprises a plurality of constituent preparations including a preparation I and a preparation II, wherein the preparations I and II each comprise a component (A) that is an ionic surfactant, a component (B) that is a cationic polymer, a component (C) that is a higher alcohol, and a component (D) that is a nonionic surfactant and have different viscosities at least at 30°C, and all of the constituent preparations are mixed together upon use. The viscosity ratio (preparation II / preparation I) of the viscosity of the preparation II at 30°C to the viscosity of the preparation I at 30°C is 3 or more, and the ratio of the shear viscosity a of a mixture prepared by mixing all of the constituent preparations together at a shear rate of 0.0037 S-1 to the shear viscosity b of the mixture at a shear rate of 139 S-1, i.e., (shear viscosity a / shear viscosity b), is 5000 or more when the shear rate is changed from 0.001 S-1 to 1000 S-1 and the shear viscosities are measured with a rheometer at 25°C.

The application provides a visual rheometer for simulating high-temperature and high-pressure environment in a well, and relates to the technical field of well rheometers.The rheometer comprises a rheometer body for detecting flow characteristics of a fluid, a mounting mechanism for mounting the rheometer body, a fluid being capable of flowing in the interior of the mounting mechanism, a mounting seat for mounting the mounting mechanism, and a fluid containing cavity and a heating assembly for heating the fluid being arranged in the mounting seat.The application aims at the problems of the prior rheometer, such as difficulty in stably and truly simulating high-temperature and high-pressure environment in an oil well, easy influence of measuring precision by pressure and non-Newtonian characteristics of the fluid, and insufficient visualization capacity, and realizes integrated integration of high-temperature and high-pressure environment simulation, rheological detection and real-time observation through systematic design of the mounting mechanism, the pressurizing mode, the isolation structure and the observation means, thereby improving the measuring precision of fluid rheological parameter measurement while ensuring the safety of the equipment.

Provided is an insulating composition capable of improving coverage properties.　An insulating composition contains (A) a thermosetting resin, (B) a curing agent and (C) a fluidity control agent, and is characterized in that a viscosity VR120 obtained by measuring solid content in the insulating composition at 120°C and 100 rpm using a rheometer is 28 mPa·s or more. The insulating composition preferably further contains a solvent (D).　

1. The name of the design product: concrete mortar rheometer. 2. The use of the design product: for carrying out rheological test of materials. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view.

Rheometry systems for use with systems including pressurized polymer melt and / or other viscous materials are described. In one embodiment, a rheometer is connected to an associated system having a bent, curved, or bendable tube to allow the rheometer to measure rheological properties at a location that would otherwise be inaccessible to position the rheometer there due to the presence of an obstruction. Embodiments including rigid straight tubes for connecting the rheometer to the associated system are also described. In another embodiment, a flow-through rheometer is connected to an industry standard 1 / 2-20 thermowell orifice, which is commonly used to attach temperature and pressure probes to vessels containing viscous materials, such as extruders or injection molding systems.

An object is to provide a production method that is a method for producing a spherical particle material by a melting method and that makes a melting spheroidization ratio higher than the conventional method. A production method for a spherical particle material of the present disclosure achieving the above object includes: a raw particle material preparation step of preparing a raw particle material composed of an inorganic material; and a spheroidization step of feeding the raw particle material into a high-temperature atmosphere to melt the raw particle material and then rapidly cooling the raw particle material to prepare a spherical particle material having a volume average particle diameter of 1 μm or more and less than 10 μm, and a powder compressibility evaluation FF value, by a powder rheometer, of the raw particle material is 2.0 or more.