417 results about "Rheometer" patented technology

The utility model relates to the technical field of rheometers, and provides an online rheometer which comprises a fixed frame, a rheometer main body is arranged outside the fixed frame, a detection mechanism is arranged inside the rheometer main body, the detection mechanism comprises a rotating blade used for stirring a solution to be detected and a detection assembly connected with the rotating blade, and the detection assembly is connected with the fixed frame. The detection assembly is used for detecting the rheological property of the to-be-detected solution through the rotating blade. According to the utility model, the innovative detection mechanism is arranged, and the sealing and separating design is adopted, so that the conditions that the detection accuracy is influenced and the cleaning is troublesome due to the fact that a solution to be detected enters a detection part due to traditional shaft connection can be effectively avoided; through the magnetic attraction effect, the rotating blades and other parts can be conveniently and rapidly disassembled or assembled, and the rheological property of the blocking force generated by rotation of the rotating blades in the solution to be detected can be detected through the detection assembly through the magnetic attraction effect.

A method of determining viscosity can include connecting a bypass flow passage in parallel with a main flow passage, connecting a mass flowmeter and a variable flow restrictor in the bypass flow passage, and connecting at least one viscometer to the bypass flow passage. A rheology measurement apparatus can include a bypass flow passage connected in parallel with a main flow passage, a mass flowmeter connected in the bypass flow passage, and a pipe viscometer connected in the bypass flow passage. Another bypass flow passage may be connected in parallel with the main flow passage, with another mass flowmeter connected in the second bypass flow passage.

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 invention belongs to the technical field of fluid mechanics, and provides a microstructure size parameter optimization method and system based on rheometer simulation and a product. According to the technical scheme, a model combining a rheometer and the surface of a microstructure is established, the drag reduction rate of the microstructure under different structural parameters and different rotating speeds is researched, and the microstructure size parameter optimization method and system based on rheometer simulation are obtained. The resistance reduction mechanism is analyzed from the aspects of speed, turbulent kinetic energy and the like, and the defect that no simulation analysis mechanism exists in the resistance reduction experiment of the rheometer is overcome. Through combination of variance analysis and response surface analysis, optimal microstructure resistance reduction parameters which are closer to reality under different rotating speeds of the rheometer and a change rule of the resistance reduction rate along with the structure parameters are obtained, so that optimal microstructure size parameters under different rotating speeds are obtained.

The invention relates to the technical field of polycarbonate, and discloses a preparation method of a halogen-free flame-retardant PC plastic material. According to the invention, polycarbonate and a triazine sulfonate-based silicone oil flame retardant are blended in a torque rheometer to obtain the halogen-free flame-retardant PC plastic material. A sulfonate group in the flame retardant can catalyze polycarbonate to be crosslinked into carbon, polysiloxane is pyrolyzed, an S-C layer is formed on the surface of polycarbonate, and a triazine group is pyrolyzed to generate nitrogen and other non-combustible gases, so that the limit oxygen index, the UL94 grade and the flame retardant property of the polycarbonate plastic material are improved. The triazine sulfonate-based silicone oil flame retardant contains hydroxyl, imino and other groups and has good compatibility with polycarbonate, the main chain is a flexible polysiloxane main chain, a good toughening effect can be achieved, and the bending strength and impact strength of a polycarbonate material are improved.

A composition for temporary bonding, comprising the following (A) to (C), and having a viscosity ranging from 500 to 10,000 mPa.s at atmospheric pressure at 23°C and a shear rate at 1 s-1 as measured by a rotatory rheometer: (A) a monofunctional (meth)acrylate having a surface tension ranging from 20 to 30 mN / m as measured by ds / de method of pendant drop method at 23°C; (B) a polyfunctional (meth)acrylate, which has a viscosity of 1,000 mPa·s or more at atmospheric pressure at 23°C and a shear rate at 1 s-1 as measured by a rotatory rheometer, is solid at 23°C, or has a molecular weight of 500 or more and a viscosity of 100 mPa·s or more and less than 1,000 mPa·s at atmospheric pressure at 23°C and a shear rate at 1 s-1 as measured by a rotatory rheometer; and (C) a photo radical polymerization initiator.

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 provides an extensional rheometer suitable for a polymer sample. The extensional rheometer comprises a base; the high-pressure cavity is mounted on the base, and the high-pressure cavity is suitable for providing different pressure environments; the two stretching rollers are arranged in the high-pressure cavity in parallel at intervals, and the two ends of the sample are connected to the two stretching rollers; the driving assembly is suitable for driving the stretching roller to rotate so as to stretch the sample; the two characterization windows are respectively arranged on two opposite side walls of the high-pressure cavity, and the characterization windows are suitable for allowing detection light beams generated by an external detection light source to penetrate through so as to obtain change information of a microstructure of the sample in a stretching process; and the torque sensor is arranged between the stretching roller and the driving assembly and is suitable for acquiring data that the stretching force generated by the sample in the stretching process changes along with different pressure environments.

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 utility model relates to the technical field of torque rheometers, in particular to a torque rheometer rotor structure convenient to clean. The torque rheometer rotor structure convenient to clean comprises a torque rheometer and an electric heating rod, a first insertion hole and a first positioning hole are formed in the left side of a rotor of the torque rheometer, two sets of through holes are evenly formed in the left side of a sealing plate of the torque rheometer in a penetrating mode, a second insertion hole is formed in the top of each through hole in a penetrating mode, and the first positioning hole and the second insertion hole are communicated through the first positioning hole. A group of third insertion holes are formed in the tops of two groups of guide holes formed in the left side of the torque rheometer sealing plate in a penetrating manner; the first handle is pulled upwards, the second handle is pulled leftwards, then the sealing plate of the torque rheometer can be taken down, then the front plate of the torque rheometer is moved leftwards and taken down, and at the moment, the rotor of the torque rheometer can be driven by the magnetic force of the square magnetic block to slide leftwards and be pulled out by pulling the handles leftwards. Therefore, the rotor can be taken down without contacting the rotor.

The invention provides a modified glass cellulose / nylon / metallocene composite material and a preparation method thereof. The method comprises the following steps: S1, modifying the surface of a glass fiber by using silicon dioxide; s2, carrying out surface hydrophobic modification on the glass fibers by adopting a silane reagent; and S3, mixing the modified glass fiber prepared in the step S2 with nylon and metallocene, reacting through a rotational rheometer, and carrying out hot press molding to obtain the modified glass fiber / nylon / metallocene composite material. The glass fiber is subjected to surface modification, so that the interfacial compatibility of the glass fiber, the nylon and the metallocene composite material is enhanced, the strength, rigidity, toughness and other properties of the nylon composite material are improved, and the requirements of the nylon material in different fields are met.

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 rheometer signal processing method, a program product and a storage medium, and the method comprises the steps: obtaining a plurality of torque data of a rheometer, detecting and replacing an outlier in the torque data through a window moving method, carrying out the noise reduction of the processed torque data through a wavelet threshold, and outputting the data. According to the method, abnormal fluctuation data is processed by adopting a moving window method, and the influence of high-frequency noise on a result is reduced by utilizing wavelet threshold noise reduction; according to the data processed by the method, signal fluctuation is removed, and the interference of special conditions such as aggregate interlocking on the data collected by the rheometer is reduced, so that the data better conforms to the test condition.

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 belongs to the technical field of environmental engineering, and relates to a method for simplifying high-solid anaerobic digestion hydraulic regulation difficulty based on flow state dimensionality reduction, which comprises the following steps: constructing geometric models of a reactor and a stirring paddle according to a target reactor; performing grid division on the whole fluid domain by using an unstructured grid with relatively high adaptability; adopting a rheometer to simulate the rheological property of the anaerobic digestion substrate; carrying out numerical simulation on the anaerobic digestion flow field by using CFD software, and calculating a result after convergence; drawing a two-dimensional cumulative flow velocity distribution normalization curve and constructing a one-dimensional high-solid anaerobic digestion hydraulic characteristic model; and the relationship between the hydraulic characteristic parameters and the research variables is obtained through data analysis. By controlling the geometric configuration and the rotating speed in the reactor, the hydraulic condition can be optimized, the energy consumption generated by stirring can be reduced, a new insight is provided for mixing characterization in the reactor, and the mixing effect in the reactor can be better controlled.

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.