30 results about "Rheopecty" patented technology

The invention relates to the technical field of fluid circulation of collagen peptide production equipment, in particular to a collagen peptide mechanical seal water circulation system which comprises an intelligent control unit, a cooling unit and an ultrasonic descaling unit. Converting the vibration spectrum into a peptide molecule aggregation tendency coefficient, correcting a viscosity predicted value to generate a flow control weight, allocating resources to a cooling unit according to a hydrolysis risk thermodynamic diagram, directionally cooling a high-risk area, activating an ultrasonic descaling unit and reducing the flow when the aggregation coefficient continuously rises and exceeds a limit, the system generates cooperative control quantity through rolling of a three-dimensional dynamic weight matrix, synchronously adjusts the rotating speed of a water pump, the opening degree of a cooling valve and ultrasonic power, solves the problems of unstable flowing, peptide chain hydrolysis and aggregation scaling, and guarantees production stability and product quality.

This invention relates to the field of metal surface treatment technology, and discloses a magnesium-silver alloy cleaning agent and its preparation and cleaning methods, comprising: a shear coupling step, in which dodecylamine and organophosphonic acid are mixed in an alcohol ether solvent at 60-65℃ and 2500-3000rpm under high shear to construct a high-energy acid-amine assemblage; a hysteresis locking step, in which the shear rate is maintained constant and the temperature is lowered to 35-40℃ at a rate of 1.5-2.0℃ / min to inhibit crystallization and lock it into a metastable precursor; and a dispersion stabilization step, in which a nonionic surfactant is added and dispersed to a semi-transparent state. This invention utilizes the rheological antagonistic mechanism of shear thinning and cooling viscosity increase to construct a metastable system with synchronous transport characteristics, eliminates the kinetic lag caused by preferential solvent wetting, realizes zero-time-difference synchronous adsorption of corrosion inhibitor and solvent on the magnesium-silver interface, and improves the storage stability of the cleaning agent.

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 application discloses a viscoelasticity parameter inversion method, and belongs to the field of medical image processing and computational imaging. The method obtains the time-space image sequence data of the measured soft tissue after excitation, extracts the shear wave group velocity by using the time-of-flight method, and equivalently takes the shear wave group velocity as the phase velocity anchor point under the zero-frequency limit condition to determine the static shear modulus; the two-dimensional fast Fourier transform is used to extract the middle-high frequency band phase velocity dispersion curve; the rheological model of the measured soft tissue is constrained based on the static shear modulus, and the single-parameter fitting of the viscosity coefficient is combined with the middle-high frequency band phase velocity dispersion curve to obtain the viscoelasticity parameter.

The application provides a composite ink material, a preparation method and application thereof, and a method for preparing a heat-conducting part by ink direct writing 3D printing. The composite ink material comprises a silicone rubber resin, a heat-conducting filler and a curing agent component. The composite ink material has excellent shear thinning rheological properties, good printing capability, good dispersibility, and the printed heat-conducting part has good heat conductivity and flexibility. In addition, the orientation degree of the heat-conducting particles in the composite material can be accurately controlled by regulating the printing speed, so as to control the heat-conducting performance of the obtained heat-conducting part.

The present invention relates to a polyethylene composition with improved rheological properties, while maintaining thermal properties and mechanical properties, the polyethylene composition having a MFR5 (5.0 kg, 190 °C, ISO 1133) of 0.1 to 4.0 g / 10min, and a viscosity at a constant shear stress of 747 Pa, eta747, of equal to or more than 130 kPa•s, said polyethylene composition being obtainable or obtained by a process comprising the steps of a) providing a polyethylene base resin (A) having a MFR5 (5.0 kg, 190 °C, ISO 1133) of 0.1 to 3.0 g / 10min and optionally comprising a content of one or more C3 to C12 alpha-olefin co-monomer(s) of from 1 to 10 wt.-%, based on the total weight of the polyethylene base resin (A), preferably further melting the polyethylene base resin (A) in an extruder, b) mixing said polyethylene base resin (A) in an amount of from 73.5 to 99.99 wt.-% with a radical initiator (B), selected from the group consisting of the peroxy compounds according to formulae (I) to (III), in an amount of from 0.01 to 1.5 wt.-%, based on the total weight of a resulting mixture, and any mixtures thereof, preferably melt mixing said polyethylene base resin (A) with the radical initiator (B) in a melt mixing device, such as an extruder; and c) reacting said polyethylene base resin (A) and the radical initiator (B) at a temperature within the range of from 150 to 300 °C, thereby obtaining the polyethylene composition. The present invention further relates to a process for producing the polyethylene composition, to articles comprising the polyethylene composition, and to the use of the polyethylene composition for making an article, preferably a pipe or a supplementary pipe article.

A flow measurement apparatus can include a main flow passage having a flowmeter, a bypass flow passage connected in parallel with the main flow passage, the bypass flow passage having a flow restrictor, a mass flowmeter, and at least one sensor configured to measure a pressure differential across the mass flowmeter, and a control system configured to determine at least one rheological parameter of a non-Newtonian fluid based on outputs of the sensor and the mass flowmeter. A method for measuring a rheological fluid property of a non-Newtonian fluid can include measuring a volumetric flow rate through a flowmeter connected in a main flow passage, measuring a differential pressure across a mass flowmeter in a bypass flow passage, measuring a mass flow rate through the bypass flow passage, and determining the rheological fluid property from the differential pressure and the mass flow rate through the bypass flow passage.

This invention discloses an optimized method and system for preparing silicone gel for acne scar repair, relating to the field of silicone gel preparation technology. The method includes obtaining physicochemical indicators such as the viscosity coefficient, refractive index, and volatile content of silicone raw materials; using a rheological prediction model to calculate the expected viscosity change curve of the silicone raw material mixing process under the current reactor temperature field; comparing this curve with a process window threshold; if the curve exceeds the threshold, triggering a gradient temperature adjustment strategy and recalculating until the curve falls within the threshold; after determining the temperature adjustment strategy, introducing a state inversion algorithm to output the dispersity parameter of the initiator addition stage based on the crosslinking density index of the target product; and dynamically adjusting the stirring rate and the timing of dispersed phase addition according to the dispersity parameter to complete the preparation. This method enables precise control of the preparation process, improves product quality stability, and meets the performance requirements of silicone gel for acne scar repair.

The invention relates to the technical field of powder metallurgy preparation, and discloses a silicon carbide aluminum-based material powder metallurgy preparation method capable of regulating and controlling anisotropy, which comprises the following steps: a precursor slurry preparation step: preparing Bingham fluid slurry with specific rheological parameters; a yield stress gating centrifugation step: utilizing a cascade centrifugation procedure, firstly maintaining a solid-like state of the slurry through low centrifugal force to inhibit sedimentation, and then triggering shear thinning through high centrifugal force to drive the flaky silicon carbide to be directionally arranged; according to the preparation method, a yield stress gating mechanism is constructed, and the contradiction between slurry suspension stability and particle orientation kinetics is solved in a single working procedure.

Coating compositions that include organic solvents and have a shear thinning rheological profile. At high shear rates the coating compositions have a viscosity low enough to flow through an opening in a high efficiency applicator and be applied to a surface. Under low or no shear, the coating compositions, when applied to a vertical surface, exhibits minimal or no sag.

The invention relates to the technical field of medicine detection, in particular to a rheological detection method and system for viscosity of enema liquid medicine, and solves the technical problem that the measurement accuracy is influenced by interference of experimental instruments. The method comprises the following steps: acquiring a liquid level image of enema liquid medicine in a capillary viscometer in a flowing process through image acquisition equipment; performing morphological characteristic analysis on the liquid level image to obtain image characteristics of the enema liquid medicine, and evaluating a pollution degree value of the capillary viscometer based on the image characteristics; the image features comprise at least one of curvature features, symmetry features and smoothness features; and determining the viscosity measurement reliability of the capillary viscometer according to the pollution degree value.

This invention discloses a method and system for assessing the viscosity of liquid feed materials in pig farms. The method includes: real-time acquisition of pressure and flow time-series signals, and continuous acquisition of video streams of material outflow, generating a multimodal raw dataset containing physical sensor data and visual images; heterogeneous feature extraction from the multimodal raw dataset, fusing them to form a multidimensional feature vector characterizing the rheological properties of the material; inputting the high-dimensional feature vector into a pre-trained deep multimodal fusion network, outputting estimated values ​​of the material rheological parameters; and assessing the viscosity grade of the material based on the estimated values ​​of the material rheological parameters and a preset viscosity grade determination rule, thereby obtaining a viscosity grade assessment result. Using this invention, a non-contact, real-time online assessment of the viscosity of liquid feed materials can be achieved, providing reliable data support for the precise control of feed concentration.

This invention relates to the field of polymer material injection molding and automation control technology, specifically to an intelligent control system for injection molding machine parameters, comprising: a rheological digital twin and feedforward calculation unit: generating wavefront position prediction information based on key timestamps; a transient pulsation command generation unit: parsing the wavefront position prediction information and superimposing high-frequency micro-amplitude pulsation commands onto the macroscopic injection speed command; a high-frequency shear heat injection and physical phase change unit: reducing the local melt viscosity of the wavefront based on the high-frequency micro-amplitude pulsation commands; an energy decoupling and state recovery unit: monitoring the execution state of the high-frequency micro-amplitude pulsation commands, restoring the polymer melt to a high viscosity state and completing cooling and solidification; and an adaptive control and optimization unit: quantifying the microstructure filling rate of the microstructure region and optimizing the transient pulsation generation strategy according to the wavefront velocity fluctuation variance. This invention ensures the complete replication of the microstructure and robustness for long-term continuous production.

This invention discloses a low-dissipation biomimetic microchannel network system and its manufacturing method based on fluid-structure interaction (FSI), belonging to the field of high-efficiency thermal management and microfluidic transport technology. Addressing the technical challenges of existing microchannels where surface roughness after additive manufacturing leads to a dramatic increase in pressure drop, and the inability of conventional mechanical polishing to handle complex three-dimensional blind cavities, this invention proposes a system deeply coupled with topological structure and rheological polishing. The various branching nodes of this microchannel network substantially follow the optimal mass transfer law of fluid mechanics (Murray's law) for multi-stage variable cross-section fractal design. During manufacturing, the physical property of a non-Newtonian fluid medium exhibiting constant wall shear stress within a branch network conforming to this law is utilized to achieve constant-rate, dead-angle-free mirror polishing of the complex network's inner surface. Ultimately, the absolute roughness equivalent of the microchannel's inner surface is strictly less than the thickness of the laminar viscous sublayer under design conditions, completely eliminating morphological shock waves at the microscopic level and achieving extremely low fluid pressure drop and highly uniform mass and heat transfer.

The invention relates to the technical field of rheology, in particular to a rheology modifier and a preparation method and application thereof.According to the rheology modifier, a DPHA cross-linking matrix is cross-linked with AM and AMPS to form a brand-new cross-linked structural body, the rheology modifier with the cross-linked structural body is applied to a coating composition, and the rheological property of the coating composition is improved. According to the coating composition, the shear thinning behavior can be effectively induced, and the viscosity of the coating composition at a high shear rate can be effectively reduced, so that the coating composition meets the construction requirements of a high-speed coating machine, and meanwhile, the storage stability and the anti-settling performance of the coating composition are improved.

The invention discloses a characterization method for redispersibility of a magnetorheological fluid material after sedimentation, relates to the technical field of intelligent materials, and aims to solve the problems of difficulty in quantification and insufficient precision of an existing method. According to the method, the constant shear viscosity and the thixotropic ring area of fluid in three states of dispersion, sedimentation and magnetic field excitation redispersion are measured through a magneto-rheological instrument, the parameters are substituted into a specific formula to calculate the redispersion rate, and objective quantitative evaluation of the redispersion performance is achieved. The core of the method is that fluid thixotropy and sediment loosening degree are directly associated by using multi-state rheological parameter collaborative characterization, data support is provided for parameter setting in magnetorheological fluid formula optimization and engineering application, and measurement precision and reliability are improved.

The present invention relates to emulsion stabilizing agents, to subterranean treatments fluids comprising said emulsion stabilizing agents and to a method of treating subterranean formations using said subterranean treatments fluids.These emulsion stabilizing agents, besides having excellent emulsifying properties, do not cause the swelling and dispersion of clays and are able to provide subterranean treatments fluids with excellent rheological behaviour even at high temperatures.

A flow measurement apparatus can include a main flow passage having a flowmeter, a bypass flow passage connected in parallel with the main flow passage, the bypass flow passage having a flow restrictor, a mass flowmeter, and at least one sensor configured to measure a pressure differential across the mass flowmeter, and a control system configured to determine at least one rheological parameter of a non-Newtonian fluid based on outputs of the sensor and the mass flowmeter. A method for measuring a rheological fluid property of a non-Newtonian fluid can include measuring a volumetric flow rate through a flowmeter connected in a main flow passage, measuring a differential pressure across a mass flowmeter in a bypass flow passage, measuring a mass flow rate through the bypass flow passage, and determining the rheological fluid property from the differential pressure and the mass flow rate through the bypass flow passage.

The present application relates to the technical field of drug detection, and in particular to a rheological detection method and system for the viscosity of enema liquid medicine, which solves the technical problem of the influence of interference on the measurement accuracy of experimental instruments. The method comprises: acquiring a liquid surface image of the enema liquid medicine in the flow process in a capillary viscometer through an image acquisition device; performing morphological feature analysis on the liquid surface image to obtain image features of the enema liquid medicine, and evaluating a pollution degree value of the capillary viscometer based on the image features; the image features include at least one of curvature features, symmetry features and smoothness features; and determining the viscosity measurement reliability of the capillary viscometer according to the pollution degree value.

The invention relates to the technical field of waterproof coatings, in particular to a waterproof coating construction viscosity control method and system, and the method comprises the steps: obtaining a rheological state vector of waterproof coating construction in real time; inputting the rheological state vector into a preset rheological behavior prediction model, wherein the rheological behavior prediction model outputs a rheological state set point; performing real-time rheological parameter regulation and control on the waterproof coating on the basis of the rheological state set point; after a phase change point is preset in the waterproof coating film forming process, morphological characterization data of a real-time film layer is obtained; and performing deviation calculation on the morphological representation data of the real-time film layer and morphological representation data of an ideal film layer, when a deviation calculation result exceeds a preset threshold value, triggering parameter correction of the rheological behavior prediction model, and generating a new rheological state set point. According to the present invention, the waterproof performance of the waterproof project can be improved, and the long-term durability of the coating film can be improved.

The invention discloses a non-Newtonian fluid polymer distributor runner structure optimization method and system, and belongs to the field of petroleum engineering oil extraction equipment design and computational fluid mechanics. Based on the rheological parameters of the target non-Newtonian fluid, a critical shear rate threshold value of mechanical degradation of the fluid is obtained; based on the shear history and critical shear rate threshold of the fluid micelles, constructing a dynamic viscosity correction model containing damage factors; constructing a parameterized geometric model of the polymer distributor runner, and setting key parameters of the polymer distributor runner structure; damage factors are introduced, a space-time coupled dynamic viscosity correction model is constructed, real-time two-way coupling of a flow field and viscosity attenuation is achieved by solving a damage transport equation, and the shearing historical effect of fluid is successfully represented; according to the method, the prediction relative error of the viscosity of the high shear zone can be reduced to 3.9% from 18.2% of a traditional model, the pressure drop prediction error is controlled within 4%, and the design prediction precision is greatly improved.

The application discloses a kind of non-newtonian fluid material in-situ online rheological characteristic testing instrument and its use method, belong to rheological test and engineering measurement and control technical field, for existing rheological test relies on sampling after laboratory detection, it belongs to non-in-situ test, fluid structure is easily damaged in process and there is time lag, lack in-situ online monitoring equipment and other problems, the instrument is composed of rotatable shell, built-in sensing test module, data acquisition module, rotary fixed base, fixed connecting rod and external fixed base;Built-in module integrates strain, speed and temperature sensor, the synchronous acquisition and intelligent processing of multi-source signal are realized through data acquisition and wireless transmission system;The device can be directly installed in the fluid system to be measured, without sampling, without destroying the structure, using the mechanical response generated by the shell rotation to obtain the yield stress, viscosity and temperature and other key parameters in real time, accurately reflect the in-situ rheological properties of fluid materials and its time-varying evolution law.

The application discloses a method for characterizing real shear rheological properties of a thin soft adhesive layer material under constraint conditions, and relates to the technical field of material mechanical property testing, and solves the technical problem that the rheological response of a micron-level thin soft adhesive layer deviates from the material body properties under real service conditions due to structural constraint conditions, and the rheological response is difficult to accurately measure; the method comprises the following steps: S1, preparing samples with different thicknesses of thin soft adhesive layers; S2, measuring rheological responses of each sample at different temperatures and frequencies as dynamic mechanical test data; S3, selecting a nonlinear function to establish a quantitative evolution relationship of the rheological response with the thickness of the adhesive layer; and S4, determining the influence range of the structural constraint on the shear rheological properties of the material by evaluating the characteristic thickness, and obtaining the real shear rheological properties of the soft adhesive layer material body; the method can reasonably consider the influence of the structural constraint effect on the response of the thin soft adhesive layer material and obtain the real shear rheological properties of the material.

The invention provides a portable rheometer, and relates to the technical field of rheometers, the portable rheometer comprises a rotating mechanism, the rotating mechanism is used for stirring fluid and can rotate on a first axis, the first axis is perpendicular to the ground, and the circumferential surface of the rotating mechanism is restrained in the radial direction and the axial direction; the axial movement of the rotating mechanism along the first axis, the radial movement of the rotating mechanism along the first axis and the rotation of the rotating mechanism around other axes perpendicular to the first axis are limited, and only the rotational degree of freedom of the rotating mechanism around the first axis is reserved. The fluid viscosity is calculated through combination of torque measurement and calculation of the rotating mechanism, geometric parameters of a shearing system of the rheometer, set rotating conditions and a rheological basic principle, a torque sensor is matched with hardware through signal adjustment, wide-range coverage can be achieved, and the problems that when fluid is too sticky, an existing rheometer is narrow in application range, low in cost and the like are solved. And in-situ measurement of rheology cannot be realized. The invention solves the problems in the prior art.

The present application relates to a kind of rheological test methods of concentrated suspension stress decomposition, belong to the rheological test field of concentrated suspension system, first, using pre-shear eliminates the shear history generated in loading sample process;Subsequently, using rheometer arbitrary wave mode carries out shear reversal experiment, determines the relationship between stress and contact force and Brownian force before and after reversal;Then, carry out shear stop experiment, obtain the size of Brownian force by extrapolation, and obtain the relative contribution of each stress in combination with shear reversal experiment. By selecting different time points on Lissajous curve to carry out shear reversal and stop experiment, the relative contribution of the stress on any point on the entire Lissajous curve is obtained. Compared with prior art, the present application can clearly determine the relative contribution of the stress generated by various microscopic processes that determine the rheological properties of the system, and further guide the formulation design of concentrated suspension, so as to obtain a better processing performance formula.

The invention relates to a precise injection molding method and system for an automobile connector. The method comprises the steps that a physical anchoring state is generated through cooperation of a rigid positioning structure of an inner mold part and a mold; confirming the heat penetration degree based on the temperature accumulation effect to generate an access instruction; real-time load pressure and screw propulsion speed are collected, and transient impact monitoring and rheological threshold analysis are executed in parallel; and after the safety verification is passed, dynamically adjusting filling parameters according to fluid resistance feedback. The method has the remarkable advantages that through fusion of physical anchoring and the feed-forward cascade protection algorithm, the risk of shear fracture of the positioning structure caused by blind pressurization under the cold start and high-viscosity working conditions is effectively solved, and high-precision self-adaptive filling is achieved on the premise that zero displacement of the inner module is ensured.

The invention discloses a slurry viscosity monitoring device and method, and relates to the technical field of fluid mechanics and petroleum drilling engineering, and the device comprises a six-speed measurement module which is used for measuring the rotating slurry viscosity at different rotating speeds; the multi-flow-velocity pressure difference measuring module is arranged on the slurry pipeline and is used for detecting the pressure difference between an inlet and an outlet in the slurry pipeline at a non-passing flow velocity and determining the current slurry viscosity based on the slurry type; the slurry type comprises Newtonian fluid and non-Newtonian fluid; the data processing and automatic calibration module is used for dynamically correcting zero drift of the pressure sensor and parameters of a rheological model according to the rotating slurry viscosity and the current slurry viscosity and the rheological model, and continuous slurry viscosity is determined.

The invention belongs to the technical field of cement grinding aid preparation, and particularly relates to a cement grinding aid and a preparation method thereof. The cement grinding aid provided by the invention comprises the raw materials of water, hydrogen peroxide and sodium stannate, by scientifically regulating and controlling the synergistic effect of the components, the cement grinding aid has good grinding aiding performance, remarkably improves the cement strength and grinding aiding efficiency and reduces energy consumption, and more importantly, the component design of the cement grinding aid is considered based on a systematic mechanism; the grinding efficiency is improved by reducing the particle surface energy and weakening the lattice strength, and the rheological property of the powder is improved by utilizing the mechanochemical effect, so that the internal friction force is reduced; in the aspect of macroscopic performance, the cement hydration process is promoted, and the grain composition and the set cement microstructure are optimized; finally, the design ensures that the product can exert stable and efficient grinding aiding and enhancing effects under different cement compositions and grinding process parameters.

The invention relates to the technical field of high polymer material injection molding and automatic control, in particular to an intelligent injection molding parameter regulation and control system for an injection molding machine, which comprises a rheological digital twinning and feed-forward resolving unit, a wavefront position prediction unit and a control unit, the transient pulsation instruction generation unit is used for analyzing the wavefront position prediction information and superposing a high-frequency micro-amplitude pulsation instruction into the macroscopic injection speed instruction; the high-frequency shearing thermal injection and physical phase change unit is used for reducing the partial melt viscosity of the wavefront based on the high-frequency micro-amplitude pulsation instruction; the energy decoupling and state recovery unit is used for monitoring the execution state of the high-frequency micro-amplitude pulse instruction, so that the polymer melt is recovered to a high-viscosity state and is cooled and solidified; the self-adaptive regulation and control and optimization unit is used for quantifying the fine structure filling rate of the fine structure region and optimizing the transient pulsation generation strategy according to the wave-front speed fluctuation variance; according to the method, the robustness of complete recarving and long-term continuous production of the fine structure is ensured.

An apparatus includes a rotatable cylindrical housing and sensors. The rotatable cylindrical housing defines a longitudinal axis. The rotatable cylindrical housing is configured to couple to a rotor. The rotor is configured to rotate the rotatable cylindrical housing about the longitudinal axis. Each sensor includes a cylindrical body, a torque sensor, and a shaft that couples the cylindrical body to the torque sensor. The cylindrical bodies of the sensors are disposed within the rotatable cylindrical housing and are space apart along the longitudinal axis. The rotatable cylindrical housing and the cylindrical bodies of the sensors define an annular space for holding a fluid. Each torque sensor of the sensors is configured to, during rotation of the rotatable cylindrical housing, measure a torque applied by the fluid residing in the annular space to the respective cylindrical body to which the torque sensor is coupled via the respective shaft.