39 results about "Rheopecty" patented technology

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 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.

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.

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 %.

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.

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.

Flexible haptic interface including a chamber containing a non-newtonian fluid and bounded at least partially by a flexible wall the exterior face of which defines a touch surface capable of being touched by a user; a plurality of actuators borne by a flexible carrier and placed so as to transmit a local mechanical excitation to the fluid; and a control circuit connected to the actuators and configured to modulate the signals sent to the actuators in order to mechanically induce a modification of the rheology of the fluid and to generate a haptic sensation perceptible by the user on the touch surface.

The invention relates to compositions containing polycarbonate and carboxylic acid esters of isosorbide, to the use of the compositions for the production of blends or shaped parts and to molded parts obtained therefrom. The compositions have improved rheological and optical properties and an improved demolding and processing behavior in the injection-molding process.