43 results about "Rheopecty" patented technology

The invention provides ‘thixotropy’ monitoring, by measuring the reversible, time-dependent reduction in viscosity occurring when concrete is subjected to mixing, and employs a mixing drum and conventional slump monitoring equipment as used on ready-mix trucks. In one embodiment, the drum is rotated until concrete is completely mixed; the speed is altered, such as by increasing it to a predetermined level; and the energy required to rotate the drum (ER) is monitored; the maximum (ER-MAX) and minimum (ER-MIN) values are recorded in computer memory; and these values are compared to pre-determined (target) values. Rheology factors (including viscosity, yield stress, and / or thixotropy) can be adjusted accordingly by adding liquid component(s) into the mix. This method, suitable for delivery of highly fluid concrete speed such as SCC, can involve transit and placement rheology targets during monitoring.

The invention relates to a method and system for monitoring and adjusting both air content and rheology (e.g., slump, slump flow) properties of a hydratable concrete mix contained within a concrete mixer. The system simultaneously tracks dosage of both rheology-modifying admixture (e.g., polycarboxylate polymer cement dispersant) and air control agent or “ACA” (e.g., air entraining agent) by reference to at least four nominal dose response (“NDR”) curves or profiles, which at least four NDR profiles are based on the respective behaviors of each of the ACA and rheology-modifying agent on air content and rheology.

The invention provides an aqueous inkjet ink composition comprises a polymeric compound comprising discrete particles responsive to an external stimulus, and a functional material, wherein the functional material may be incorporated as part of the polymeric particles, the particles causing the composition to have a first rheological state and a different second rheological state in response to a stimulated change in conditions, the first rheological state being associated with a first lower viscosity of the composition, wherein the particles have a first lower volume, enabling the composition to pass through an inkjet printhead orifice and the second rheological state being associated with a second higher viscosity of the composition, wherein the particles have a second higher volume, enabling immobilisation of droplets of the composition on a substrate. The inkjet composition is particularly useful in a continuous inkjet printing system for printing onto a wide range of surfaces including impermeable surfaces.

Systems and methods for predicting an efficient hole cleaning in vertical, deviated, and horizontal holes by developing a hole cleaning model that combines hole cleaning and drilling rate to optimize performance. Specifically by ensuring optimum mud rheology values that have an influence on drilling mud from the aspects of ECD, cuttings transport, shear thinning, and thixotropic, and developing an effective hole cleaning model by utilizing carrying capacity index (CCI) and cutting concentration in annulus (CCA).

The invention relates to a deicing and anti-icing fluid, particularly a non-Newtonian fuselage deicing and anti-icing fluid and a preparation method thereof. The non-Newtonian fuselage deicing and anti-icing fluid can reduce adhesion of ice on the object surface to eliminate and prevent icing on the aircraft fuselage surface, and has superlong anti-icing retention time. The non-Newtonian fuselage deicing and anti-icing fluid comprises the following components in parts by mass: 40-60 parts of freezing-point depressant, 0.05-1.2 parts of rheologic modifier, 0.01-0.3 part of anti-icing compounding agent, 0.01-3 parts of pH regulator, 0.01-3 parts of corrosion inhibitor, 0.01-0.5 part of staining agent and 40-60 parts of deionized water. The invention is based on the low-temperature rheologic research, especially aims at the low-temperature operating environment and characteristics of the deicing and anti-icing fluid, and determines the distribution and arrangement of the main chain and branch chain of the rheologic modifier as well as the preparation and acquisition method of the low-temperature conformation. By combining the anti-icing compounding agent, corrosion inhibitor and other assistants in the formula, the prepared deicing and anti-icing fluid has the characteristics of excellent shearing restorability, excellent ice adhesion inhibition capacity at 0 to -20 DEG C, and long anti-icing time.

The invention provides a bicontinuous phase micro-emulsion which comprises an emulsifier, a water soluble acid, an oil phase and a water phase. The emulsifier is an amine nonionic emulsifier. The invention further discloses a drilling fluid containing the micro-emulsion. The drilling fluid comprises the micro-emulsion, an oil base stabilizer, organic soil and a weighing material. The invention further discloses a preparation method of the micro-emulsion and the drilling fluid. The method comprises the steps that other raw materials are mixed, the water soluble acid is added for induction to obtain the bicontinuous phase micro-emulsion and the drilling fluid, or the other raw materials and the water soluble acid are mixed at first to obtain the bicontinuous phase micro-emulsion, a drillingfluid additive is added, and the bicontinuous drilling fluid is obtained. The bicontinuous phase micro-emulsion has the advantages that the unique oil phase and water phase bicontinuous characteristics, high shearing force, low plastic viscosity and viscoelasticity rheologic characteristics are achieved, the advantages of the oil phase and water phase drilling fluids can be shown at the same timewhen the micro-emulsion is used for the drilling fluid, and the water power transmission, suspension, rock debris carrying and well cleaning capability of the drilling fluid are enhanced.

The invention discloses an over-wall high-elasticity joint material for steel bridge deck pavement maintenance and a preparation method and a use method of the over-wall high-elasticity joint material. The over-wall high-elasticity joint material consists of a main agent A and a curing agent B, wherein the main agent A comprises the following components in parts by weight: 50-150 parts of molten polysulfide rubber, 20-100 parts of a plasticizer, 0-30 parts of a tackifying resin, 50-250 parts of packing and 1-3 parts of a coupling agent; the curing agent B comprises the following components in parts by weight: 30-60 parts of a vulcanizing agent, 30-60 parts of a plasticizer, 10-30 parts of packing and 1-5 parts of a promoter; the weight ratio of the main agent A to the curing agent B is 100:(5-15). According to the product disclosed by the invention, the packing with thixotropism is introduced into the joint material on the basis of a rheology principle, so that the flowability of the high-elasticity joint material on an original pavement cross section is degraded, and sealing and adhesion of new and old pavements are achieved. In addition, the product is based on molecule chain segment movement and mutual action mechanisms, and the movement resistance of molecule chains of high-flexibility polysulfide rubber is further weakened by using the plasticizer, so that the elasticity of the over-wall high-elasticity joint material is greatly improved, and synergic deformation of the new and old pavements is achieved.

The invention provides a preparation method of low-viscosity and high-purity yeast mannan. The preparation method comprises the following steps: taking the cell wall of saccharomyces cerevisiae as a raw material, adopting water extract and alcohol precipitation method to obtain rough yeast mannan, performing enzymolysis and centrifugation on the rough yeast mannan by neutral protease and pronase, and processing to obtain the product. The preparation method combines secondary digestion, centrifugation, ultrafiltration with spray drying technology, the equipment adopted can meet the requirements of the industrialized production, the yeast mannan obtained has a purity greater than 90 percent, is low in viscosity, belongs to Newtonian fluid, and cannot affect the rheological property of system in actual application.

The invention relates to a cement composition for a self-levelling concrete, that comprises a mixture of rheology-modifying additives, characterised in that it comprises the combination of at least a first agent for substantially increasing the shear threshold of the concrete in the fluid state and at least a second viscosity-increasing agent for substantially increasing the viscosity of said concrete in the fluid state in order to limit or prevent the dynamic segregation of granulates in the concrete during the implementation thereof. The use of such a composition can replace the presence of a filler in the concrete, in particular a self-levelling concrete, without diminishing the performance concerning the spreading thereof, the sieve stability, the bleeding and the dynamic segregation relative to a concrete containing a filler, in particular a concrete having the same water / cement ratio.

A method is provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, measuring the shear stress as a function of shear rate, determining the yield stress using the Herschel-Bulkley equation and assessing the yield stress. A method is also provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, determining at least one of (i) the storage modulus G′ and loss modulus G″ of the composition by subjecting the composition to sinusoidal (oscillating) stress or strain of certain amplitude and frequency, (ii) the phase lag (angle) of the response strain or stress δ, or (iii) the tangent (tan) δ, and (c) assessing at least one of the G′, G″, δ, or tan(δ) determined.

A composition for improved oral care includes fibrillated material and friction elements for removal of plaque biofilm, and additional ingredients useful in oral care compositions. The composition also may include particulate SuperAbsorbent Polymer, which may be surface cross-linked. Certain ingredients may be minimized or avoided to reduce the lubricity of the composition. The composition may be a viscoelastic fluid having a desired viscosity, yield stress and elastic modulus. The efficacy can be characterized by its removal of biofilm due to flow inside tubes. Also useful are standard rheological and tribological measurements. Also disclosed are apparatus for administering the composition, and methods.

A rheometer is provided for measuring rheological properties of a filtercake. The rheometer comprises a cell for containing a pressurised fluid supporting a particulate suspension. The cell has two outlets for removing the fluid from the cell. The cell further has a respective foraminous body at each outlet, such that the particulate suspension forms a filtercake on a surface of each foraminous body as pressurised fluid filters through the body when the fluid passes from the cell to the respective outlet. The foraminous bodies are translatable relative to each other, such that the filtercakes formed on said surfaces can be approached to form a unified filtercake. The foraminous bodies are also rotatable relative to each other. The rheometer further comprises a torque sensor for measuring a torque required to rotate the foraminous bodies relative to each other. The measured torque is indicative of one or more rheological properties of the unified filtercake.

The invention provides a system for the preshearing based control of the flow and deformation behavior, i.e., the setting kinetics, and the time dependent shear viscosity, elasticity of aqueous cementitious suspensions that can be used for bone repair and regeneration. The dynamic cement microstructure is tailored to the demands of the surgical tasks (faster / slower setting) or additive manufacturing tasks (lower / higher viscosity) by application of various preshearing conditions. Since the relationships between the preshearing and pressurization conditions and the setting kinetics and the time dependent changes in elasticity and viscosity are complex, a priori characterization of viscoelastic properties using the advanced rheological characterization technique of small-amplitude oscillatory rheometry is needed to enable such tailoring. The preshearing system is intended to give control on the injectability and setting time of any calcium phosphate cement formulation to the surgeon during an orthopedic surgery where a batch of bone cement is processed. Other possible utilizations of the system include controlling the setting kinetics, shear viscosity and facilitating the resultant flow stability of cementitious ceramic suspensions processed in direct ink writing assemblies for additive manufacturing of cement constructs, in injection systems for oil wells, restoration and fracking.

The invention relates generally to gels or viscous fluids formed by the coordination of certain amino-functionalized siloxanes with titanates and the use of the same in cosmetic compositions, including for providing long-wearing, comfortable films on a keratinous surface (e.g., lips). The gels or viscous fluids may exhibit unique rheological properties, including shear thickening (dilatancy) and / or rheopecty, at low shear rates which may lead to self-leveling effects, including renewable shine.

The invention discloses a gel propellant adopted as an aerospace fuel, a preparation method and uses thereof. The preparation method comprises: adding acetal substituted glucamide to a solvent to achieve the acetal substituted glucamide content of 1-30 mg / mL, heating to a temperature of 150-180 DEG C under stirring, stopping the stirring, and cooling to a room temperature, wherein the solvent is JP-10 or RP-1. According to the present invention, the gel propellant adopted as the aerospace fuel has heat reversibility and thixotropy, has the high instantaneous recovering rate after the thixotropy, and can achieve the completely recovering state; the rheological property of the gel can be improved by adding the combustion-supporting agent nanometer powder; and the obtained gel propellant can be used as the aerospace fuel.

Oil-in-water emulsions contain an oil dispersed phase, an aqueous continuous phase, and partly silylated pyrogenic silica having a content of silanol groups of 1.7 to 0.9 SiOH / nm2 wherein 50% to 95% of silanol groups of the starting silica are silylated, present at the interface between the dispersed phase and the continuous phase and an electrolyte content in the aqueous phase which establishes the viscosity of the emulsion.

The invention relates generally to gels or viscous fluids formed by the coordination of certain amino-functionalized siloxanes with titanates and the use of the same in cosmetic compositions, including for providing long-wearing, comfortable films on a keratinous surface (e.g., lips). The gels or viscous fluids may exhibit unique rheological properties, including shear thickening (dilatancy) and / or rheopecty, at low shear rates which may lead to self-leveling effects, including renewable shine; and may exhibit high gloss and low shear.

Systems and methods for predicting an efficient hole cleaning in vertical, deviated, and horizontal holes by developing a hole cleaning model that combines hole cleaning and drilling rate to optimize performance. Specifically by ensuring optimum mud rheology values that have an influence on drilling mud from the aspects of ECD, cuttings transport, shear thinning, and thixotropic, and developing an effective hole cleaning model by utilizing carrying capacity index (CCI) and cutting concentration in annulus (CCA).

The invention provides a double-material-barrel type capillary rheometer, and belongs to the technical field of rheology testing. The capillary rheometer comprises a machine box, a machine cover and amaterial barrel a, wherein the machine cover is located at the top of the machine box and movably connected with the machine box, the material barrel a is arranged at the left end of the inner side of the machine box and the material barrel a is fixedly connected with the machine box; the material barrel b is arranged at the right end of the inner side of the machine box and fixedly connected with the machine box; a pressure release valve is arranged in the machine box and fixedly connected with the machine box; and a heating plate is arranged in the machine box. The double-material-barrel type capillary rheometer is stable in structure; when the device is actually used, and when the materials are dissolved, the high temperature in the machine can be effectively maintained, and the materials can be fully dissolved; and the device is high in heat dissipation performance, equipment in the machine can dissipate heat of the machine due to the fact that the machine needs to be dissolved athigh temperature for a long time during work, and the problem that the equipment in the machine is damaged due to the fact that the machine is at high temperature for a long time is solved.

The invention relates to a concrete pumpability control method based on rheological properties, which belongs to the technical field of construction engineering concrete. In view of the lack of accuracy of the current concrete pumpability evaluation method. This method first uses the plastic viscosity index and the expansion degree index to fit the relationship curve between the plastic viscosity and the expansion degree index of concrete of different strength grades, breaking through the traditional evaluation limitations of "the greater the concrete expansion degree, the more favorable the pumping construction" , to effectively ensure the quality of concrete in pumping construction; at the same time, through the comprehensive cost index and plastic viscosity index, the relationship curve between the comprehensive cost index and plastic viscosity index of concrete of different strength grades is fitted to determine the concrete plastic viscosity index suitable for pumping construction , to reduce the cost of concrete pumping construction; through the scientific determination of the expansion degree index, a concrete pumpability control method based on rheological properties is finally formed to ensure the smooth progress of the project.

A curable sheet-like composite material comprising curable resin and at least one layer of structural fibres, and comprising an outer backing layer having a shear- dependent rheology, whereby the backing layer exhibits essentially no flow at rest on the outer surface of the composite material and exhibits a viscous flow response to induced shear.

The invention provides a bicontinuous phase micro-emulsion which comprises an emulsifier, a water soluble acid, an oil phase and a water phase. The emulsifier is an amine nonionic emulsifier. The invention further discloses a drilling fluid containing the micro-emulsion. The drilling fluid comprises the micro-emulsion, an oil base stabilizer, organic soil and a weighing material. The invention further discloses a preparation method of the micro-emulsion and the drilling fluid. The method comprises the steps that other raw materials are mixed, the water soluble acid is added for induction to obtain the bicontinuous phase micro-emulsion and the drilling fluid, or the other raw materials and the water soluble acid are mixed at first to obtain the bicontinuous phase micro-emulsion, a drillingfluid additive is added, and the bicontinuous drilling fluid is obtained. The bicontinuous phase micro-emulsion has the advantages that the unique oil phase and water phase bicontinuous characteristics, high shearing force, low plastic viscosity and viscoelasticity rheologic characteristics are achieved, the advantages of the oil phase and water phase drilling fluids can be shown at the same timewhen the micro-emulsion is used for the drilling fluid, and the water power transmission, suspension, rock debris carrying and well cleaning capability of the drilling fluid are enhanced.

A method is provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, measuring the shear stress as a function of shear rate, determining the yield stress using the Herschel-Bulkley equation and assessing the yield stress. A method is also provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, determining at least one of (i) the storage modulus G′ and loss modulus G″ of the composition by subjecting the composition to sinusoidal (oscillating) stress or strain of certain amplitude and frequency, (ii) the phase lag (angle) of the response strain or stress δ, or (iii) the tangent (tan) δ, and (c) assessing at least one of the G′, G″, δ, or tan(δ) determined.

A curable organopolysiloxane composition having rheological properties suitable for precision application and fine pattern formation by a fine droplet coating apparatus such as a jet dispenser, along with a method for forming a pattern using the same, and an electronic component using the same, is provided herein. The curable organopolysiloxane composition is hydrosilylation reaction curable and can be precisely applied by a jet dispenser, etc. The composition has a viscosity at a strain speed of 1,000 (1 / s) of 2.0 Pa·s or less, while the viscosity at a strain speed of 0.1 (1 / s) is a value 50.0-fold or more the viscosity at a strain speed of 1,000 (1 / s). The content of silicon atom-bonded aromatic functional groups in the composition is within a range of from 1.0 to 6.0 mass %.

The invention relates to a deicing and anti-icing fluid, particularly a non-Newtonian fuselage deicing and anti-icing fluid and a preparation method thereof. The non-Newtonian fuselage deicing and anti-icing fluid can reduce adhesion of ice on the object surface to eliminate and prevent icing on the aircraft fuselage surface, and has superlong anti-icing retention time. The non-Newtonian fuselage deicing and anti-icing fluid comprises the following components in parts by mass: 40-60 parts of freezing-point depressant, 0.05-1.2 parts of rheologic modifier, 0.01-0.3 part of anti-icing compounding agent, 0.01-3 parts of pH regulator, 0.01-3 parts of corrosion inhibitor, 0.01-0.5 part of staining agent and 40-60 parts of deionized water. The invention is based on the low-temperature rheologic research, especially aims at the low-temperature operating environment and characteristics of the deicing and anti-icing fluid, and determines the distribution and arrangement of the main chain and branch chain of the rheologic modifier as well as the preparation and acquisition method of the low-temperature conformation. By combining the anti-icing compounding agent, corrosion inhibitor and other assistants in the formula, the prepared deicing and anti-icing fluid has the characteristics of excellent shearing restorability, excellent ice adhesion inhibition capacity at 0 to -20 DEG C, and long anti-icing time.

An aqueous composition, a sprayable composition containing the aqueous composition, and a method of making the aqueous composition are provided. The aqueous composition includes an aqueous phase and liquid benefit agent droplets discontinuously dispersed throughout the aqueous phase. The aqueous phase has a structurant system including a first polysaccharide and a second polysaccharide that is different from the first polysaccharide. The aqueous phase comprises less than 10,000 ppm surfactant. The aqueous composition exhibits yield stress as determined by rheological testing methods.

The invention discloses a gel propellant adopted as an aerospace fuel, a preparation method and uses thereof. The preparation method comprises: adding acetal substituted glucamide to a solvent to achieve the acetal substituted glucamide content of 1-30 mg / mL, heating to a temperature of 150-180 DEG C under stirring, stopping the stirring, and cooling to a room temperature, wherein the solvent is JP-10 or RP-1. According to the present invention, the gel propellant adopted as the aerospace fuel has heat reversibility and thixotropy, has the high instantaneous recovering rate after the thixotropy, and can achieve the completely recovering state; the rheological property of the gel can be improved by adding the combustion-supporting agent nanometer powder; and the obtained gel propellant can be used as the aerospace fuel.

Cross-linked shear-thinning fluids of pectic acid demonstrating increased viscosity with decreasing shear, as well as methods of producing and using the same. A shear-thinning fluid includes an aqueous solution of pectic acid cross-linked by a divalent cation is disclosed. The pectic acid may be present in an amount ranging from about 0.5 to about 3.0% (w / v), the divalent cation may be present at a concentration of from about 0.5 mM to about 7.0 mM, and the viscosity of the shear-thinning fluid increases with decreasing shear. These cross-linked shear-thinning fluids of pectic acid can be utilized for controlled release formulations, cell encapsulation, and 3D printing, and provide for an improved balance between structure fidelity / mechanical stability and cell viability.

The invention provides a non-Newtonian fluid simulation method and device, and the method comprises the steps: respectively simulating a liquid phase and a suspended particle phase of a non-Newtonian fluid based on a continuity equation and a momentum equation; coupling the liquid phase and the suspended particle phase through a fluid resistance formula and a fluid pressure formula, and acquiring a two-phase suspension model with the property between the liquid phase and the suspended particle phase; constructing an elastic-plastic constitutive model based on a suspended particle phase according to the plastic shear stress and the volume change of the two-phase suspension model; constructing a friction function according to the particle skeleton structure change of the two-phase suspension model, and adding the friction function into the elastic-plastic constitutive model to simulate the rheological characteristics of the non-Newtonian fluid. According to the method, the real physical mechanism of the bottom layer is modeled, so that the simulation of the non-Newtonian property is realized, and physically interpretable parameter control is provided, so that different types of non-Newtonian fluids are uniformly simulated, and the rheological characteristics of the non-Newtonian fluids are accurately described.

Hydrostatic plain bearing arrangement comprising a first, in particular lower bearing element (1) and a second, in particular upper bearing element (2), wherein at least one recess (3) is arranged inat least one of the bearing elements (1), in particular in the first bearing element (1), which recess (3) is open in the direction of the other bearing element (2) which preferably lies opposite, andwhich recess (3) forms at least one bearing pocket (3) which is filled with a fluid (FL1) which can be pressurized / is pressurized, wherein the at least one bearing pocket (3) is surrounded by at least one annular or frame-shaped sealing arrangement (5, 7 / 8, 6 / FL2). The invention also relates to a plain bearing arrangement of this type, in which the fluid (FL1) in the at least one bearing pocket (3) has the rheological behaviour of a Bingham body.