50 results about "Surface-tension values" patented technology

The present invention relates to a stress stable lathering skin cleansing liquid composition comprising by weight parts of the liquid composition: (a) from about 0.5 parts to 10 parts of a stabilizer; for example trihydroxystearin; (b) from about 1 part to about 80 parts of lipid skin moisturizing agent; (c) from about 1 part to about 30 parts of surfactant having a combined CMC equilibrium surface tension value of from 15 to 50; (d) water; wherein said stress stable lathering skin cleansing liquid composition has a Lipid Deposition Value (LDV) of from about 5 to about 100 and wherein said composition is stable for at least two weeks at 100 F.

A method of coating an implantable medical device, such as a stent, is disclosed. The method includes applying a formulation on a first polymer layer containing a therapeutic substance to form a second layer. The formulation can contain a highly hydrophobic polymer or a solvent which is a poor solvent for the drug or the polymer of the first layer. The formulation can have a low surface tension value or a high Weber number value.

The invention discloses an interfacial rheological testing method and an interfacial rheological testing apparatus by using liquid drop imagery. According to the invention, after least squares fitting and secondary optimization by using a Newton iteration method are carried out on a discretized Young-lapalace equation theoretical calculated curve and an actual liquid drop contour boundary curve, interfacial chemical properties like surface tension, interfacial tension and a contact angle value, the volume, the area and the wetting line of liquid drops, etc. can be calculated; then interfacial rheological properties like interfacial dilational elasticity Epsilon d and interfacial dilational viscosity Eta d can be obtained through analysis by using an interfacial tension relaxation method; a set of liquid drop sample introduction system and a set of testing apparatus are provided, liquid drop oscillation is realized through corresponding control software so as to increase or reduce the amount of liquid drops and allow oscillation process to accord with sine, cosine, square wave and sawtooth changes. The apparatus provided by the invention enlarges the application field of optical interface chemical analysis apparatuses and meets requirements for high-precision automatic testing of dynamic/static contact angle values, dynamic/static surface tension values, interfacial tension values and interface rheological measurement values.

The invention relates to a kind of complex biological surface active agent and the preparation method. It is prepared with bacillus subtilis, and the comprised component and their weight proportion are as follows: fat 98.1+- 0.2%, protein 19.1+- 0.2%, sugar 0.7+-0.1%, the critical micelle concentration of said complex biological surface active agent are 4.2- 5.0 g/l and 1.25- 1.39 g/l respectively, and they reduce interfacial force of distilled water from 78 m/m to 38.4- 39.8 mN/m, and 40.3- 40.8 mN/m. The invention is characterized in that it enriches biological surface active agent species generated by bacillus subtilis, and make it possible for bacillus subtilis wide application in environmental pollution treatment.

The invention discloses an apparatus and a method for testing light-gas surface tension and light-liquid interfacial tension by using a wilhelmy plate method. The apparatus comprises a weighting sensor, a displacement platform and a displacement sensor, a wilhelmy plate, a temperature control system, a temperature sensor, a sample pan, a sample stand, a motor system, software and the like. A wilhelmy plate analysis method is adopted, the sample pan provided with a sample to be tested is placed on the sample stand, the displacement platform raises under the control of the software; when the condition of the wilhelmy plate method is reached, the displacement platform stops raising, the software reads the value of the weighting sensor and the displacement value, carries out buoyancy correction, density correction, contact angle correction, zero position correction and unit conversion on the values, and finally displaces the measured surface tension or interfacial tension in real time; meanwhile, temperature values of the sample to be tested of corresponding time are recorded by the software. The invention can completely improve the accuracy of the values of the light-gas surface tension and the light-liquid interfacial tension, and has simple operation, wide application range and higher popularization value.

For measuring the surface tension between a liquid and fluid such as a gas, a capillary (3, 3′) is used in which the liquid slowly flows and at the end of which drops (11) are formed, falling off into a closed space (7) containing the fluid. Using a pressure sensor (5, 5′) the pressure is measured which can be the absolute pressure of a fluid volume enclosed in the closed space or alternatively a differential pressure measured as the pressure difference between the liquid in the capillary and fluid contained in the closed space. The pressure is measured when one or more drops are formed and full off. The obtained pressure curves are evaluated electronically (12) and provide a value of the surface tension. The measurement can be made within a fairly short time with a high operational reliability. The temperature difference between the drop and the surrounding fluid is small resulting in a little precipitation of salts dissolved in the liquid, reducing the risk that the liquid capillary with be blocked. A pump can be connected (9) to the closed space to create a subatmospheric pressure therein and thereby assist in restarting the liquid flow through the capillary if it would be blocked. The velocity of the liquid flow to the drop can be controlled using the pump.

The invention discloses a method for preparing a lipopeptide biological surfactant. The adopted bacterial strain is brevibacterium halotolerans Y-1-4, the collection number is CGMCC No.8823, cheap saccharose molasses serves as a carbon source of a medium, corn steep liquor serves as a nitrogen source, nutrient elements such as other phosphorus sources and inorganic salt are added, the mixture is fermented to be subjected to the acid precipitation step, the organic solvent extraction step and the like, and the lipopeptide biological surfactant is obtained. The critical micelle concentration of the lipopeptide biological surfactant is 21.512 mg/L, and the surface tension value of distilled water can be reduced to 28 mN/m or below from 72 mN/m (25 DEG C); the raw materials required by the lipopeptide biological surfactant produced with the method are cheap and easy to obtain. According to the method, the kinds of producing bacteria of the lipopeptide biological surfactant are enriched, the production cost of lipopeptide is reduced through the cheap raw materials, and it is possible that the biological surfactant is more widely applied.

The invention provides a surface tension measuring method based on an axisymmetric droplet contour curve. The method comprises the following steps: a tiled droplet image is taken, and a droplet contour curve is extracted; two measurement points not on the same horizontal plane are selected on the droplet contour curve; and the above geometric parameters associated with the selected two measurementpoints on the droplet contour curve are measured, and the surface tension of the liquid is calculated by using the following formula as described in the specifications. Through measurement on the geometric parameters of one point on the axisymmetric droplet surface and measurement on the associated liquid volume, the surface tension value can be simply obtained, no complex calculation is needed,and the calculation time is saved; and for an uneven surface tension condition, the surface tension of any point on the liquid can be simply obtained.

The invention relates to a polystyrene material with low surface tension, which is prepared by the following raw materials in weight portion: 1,000 portions of polystyrene, 5 to 25 portions of dimethyl silicone polymer and 5 to 40 portions of polytetrafluoroethylene. The polystyrene material with low surface tension introduces two adequate surface auxiliary agents with low surface tension value in a polystyrene system by means of blending; and the two surface auxiliary agents introduced are food level, and have absolute safety and low cost. The invention also provides a method for preparing raw materials of the polystyrene material with low surface tension, relates to a method for producing the polystyrene material with low surface tension, in particular to a method for producing a polystyrene sheet with low surface tension, and also relates to a packaging material for food which is processed by the polystyrene sheet with low surface tension. The methods can reduce the surface tension value of the polystyrene material and then reduce the adherence degree of fermented milk on the surface of the polystyrene material, and also has the advantage of simple and convenient operation method.

The invention provides a method for detecting inoxidizability of lubricating oil, which includes the following steps: (1) determining surface tension value N1 of lubricating oil; (2) placing lubricating oil in a baking oven for baking at constant temperature; (3) determining the surface tension of lubricating oil after baking according to the step (2), and obtaining the surface tension value N2; (4) determining inoxidizability of lubricating oil according to the surface tension value N1 and 2 before and after baking. The detection method of the inoxidizability of lubricating oil provided by the invention has the characteristics of simple operation, visual and reliable result, easy determination and good reappearance, and the method can be used as an effective technology means for investigating inoxidizability of lubricating oil, and is good for popularization usage.

The invention discloses a degreasing process for improving the surface wetting tension of medicinal aluminum foil, which belongs to the technical field of medicinal aluminum foil processing and comprises the following steps: (1) raising the temperature of the annealing furnace to a preset temperature; The aluminum foil is installed in the annealing furnace frame and placed on the annealing furnace trolley; (3) After reaching the preset temperature, the furnace door is opened, and the aluminum foil to be processed is sent into the furnace by the annealing furnace trolley; (4) at the preset temperature Predetermined heat preservation time; (5) Open the furnace door after the predetermined time of heat preservation, take out the annealing furnace trolley, and naturally cool to room temperature in the air. In particular, a process suitable for degreasing 8011 alloy aluminum foil is disclosed. It solves the defects of low dyne value, long degreasing time and high energy consumption of the blister medical aluminum foil processed by the traditional aluminum foil degreasing process, realizes the purpose of increasing the surface tension value of the aluminum foil to 34 dyne, and satisfies the needs of users Require.

The invention relates to a new biological emulsifier generated in bacilus subtilis and the production method, the per centage of the composites of the emulsifier is: protein 45.6 plus and minus 0.3 per cent, carbohydrate 8.9 plus and minus 0.3 per cent, the critical micelle concentration is 2.67 to 2.96 g/L, the invention reduces the surface tension value of distilled water from 78mN/m to 45.7 to 47.3mN/m , the emulsification index of the biological emulsifier E24 keeps between 60 to 70 per cent; the invention is characterized in that: the invention enriches the kinds of the biological surface activating agent generated in bacilus subtilis, which makes the wide use of bacilus subtilis in industry specially in compost factor on environment pollution administration be possible.

It is the object of the present invention to provide a cycloolefin-based film which, when used as a substrate for a touch panel, shows high adhesion to a transparent conductive layer and excellent keyboard durability in a high-temperature high-humidity durability test, and has reduced display inconsistency. The cycloolefin-based film of the present invention is a cycloolefin-based film containing a cycloolefin-based polymer having at least a polar group, and comprises: an aromatic solvent in the range of 50-300 ppm; a halide-based solvent in the range of 300-800 ppm; and a non-aromatic solvent (excluding halide-based solvents) in the range of 300-6000 ppm, wherein the non-aromatic solvent has a solubility parameter value (SP value) in the range of 15-25 ((MPa)^1/2) and has a surface tension value in the range of 20-25 (mN/m).

The invention discloses a testing device and method for hanging-drop method solid surface free energy, and belongs to the technical field of interface chemistry analysis and testing. The device comprises a rotation mechanism capable of rotating for 360 degrees in a vertical surface, a lifting mechanism fixed on the rotation mechanism, an adjustable sample table fixed on the lifting mechanism, anda sample fixture fixed on the adjustable sample table. The testing device capable of rotating for 360 degrees is arranged to form a contact angle value of a solid material under a hanging-drop methodstate; the surface tension value of liquid during the hanging-drop method and a corrected 3D contact angle value are simultaneously tested to effectively avoid an obvious influence of the lagging contact angle on a testing result during hanging-drop method contact angle measurement, testing accuracy is improved, the scientificity and the reliability of a value testing result are improved, value testing accuracy is high, operation is convenient, and the device has a very high promotion value.

The invention discloses a device and a method for testing layered dynamic adsorption and interface rheology of a molecular film, and belongs to the technical field of interface chemical analysis and testing. The method comprises: hanging a platinum plate below the analytical balance, and testing the meniscus contact angle of the corrected thin plate and the surface tension after buoyancy when theupper edge of the platinum plate is in contact with the liquid; immersing a U-shaped needle head into the tested liquid; testing the dynamic surface tension during hanging drop, to complete the dynamic adsorption test of the molecular films of different layers, and dynamically analyzing a change curve of a surface tension value along with time and a surface area; analyzing to obtain the dynamic adsorption of the corresponding molecular film and the modulus of the corresponding interface elastic coefficient. The method is particularly suitable for layered dynamic adsorption analysis of molecular films of surfactants and colloidal solutions and determination of interface rheological properties, greatly improves the analysis precision and the credibility of measured values, is wide in application industry field, and has extremely high popularization value.

The invention discloses a polystyrene-graphene oxide composite bulk material and a preparation method thereof. The preparation method comprises the steps as follows: a polystyrene microsphere emulsionand graphene oxide are mixed, an organic solvent which can be dissolved in water and has the surface tension value smaller than 40 mN/m IS ADDED, THE polystyrene microsphere emulsion are demulsifiedand coagulated, and the polystyrene-graphene oxide composite bulk material is obtained after drying. The preparation method is simple in process, green and safe. The invention also provides a preparation method of the graphene-based porous bulk material. According to the preparation method, the polystyrene-graphene oxide composite bulk material is calcined at high temperature in a protective atmosphere, so that the graphene-based porous bulk material adopting a porous structure is obtained and is applied to an electrode material of supercapacitors.

The invention discloses a bore diameter measuring apparatus for porous material, which is a box-body structure; the bore diameter measuring apparatus comprises a mechanical part and an electronic measurement and control system, the mechanical part comprises a test head, a pressure regulation device, a detection valve, a pressure measurement device and a control panel arranged on the surface of the box body; a surface tension value of test fluid is only input in the bore diameter measuring apparatus, the maximum bore diameter value of a primary test sample is calculated; the invention further discloses a bore diameter measuring method of porous material; the porous material is completely humidified, test fluid with constant surface tension is used for soaking a sample, so as to lead the pore channel gap of the sample to be saturated and cause the air to pass through the sample pore gap soaked by the tested liquid forcibly, the pressure needed by bubbling a first air bubble from the gap is observed, and then the maximum pore diameter value r of the sample is calculated by a formula.

The invention discloses a weighing principle based surface tension testing device and method of a sandwich effect, and belongs to the technical field of interface chemical analysis and test. The testdevice comprises a test sample cell, a test probe, a layered sample cell, a tee joint, a liquid inlet pump and a liquid storage pool, the layered sample cell is arranged in the middle portion of the test sample cell and divides the test sample cell into upper and lower accommodating areas, the layered sample cell includes a shunting tube through which the upper and lower accommodating areas are communicated in the test sample cell, the tee joint is communicated with the upper and lower accommodating areas in the test sample cell via upper and lower liquid inlet tubes respectively, the upper and lower liquid inlet tubes are provided with upper and lower liquid inlet valves respectively, the tee joint is also communicated with the liquid storage pool via a pipe, and the liquid inlet pump isarranged on the pipe. The surface tension value and dynamic adsorption time of the layers can be measured at the same time, the measuring precision is high, operation is convenient, and the device andmethod are worthy of popularization.

The invention discloses a digital ink-jet printing method. The digital ink-jet printing method comprises the following steps: measuring the bleeding rate of fabric, measuring the surface tension of a dye; setting piezoelectric pressure of a printing spray head to control the ink-jet amount of the printing spray head according to the bleeding rate of the selected fabric and the surface tension value of the selected dye; carrying out ink-jet printing; drying the ink after printing; and carrying out steaming, washing and drying; and in the step of setting the piezoelectric pressure of the printing spray head to control the ink-jet amount of the printing spray head according to the bleeding rate of the selected fabric and the surface tension value of the selected dye, the piezoelectric pressure of the printing spray head is determined after the bleeding rate of the dyes with different colors when mixed for dyeing, and the surface tension of the mixed dye on the corresponding fabric are measured respectively. Free from the thinking of the field, the bleeding phenomenon caused by diffusion of dye ink between the fabric and capillary tubes is well solved; the ink is saved; and the bleeding rate after the dyes with different colors are mixed is also considered.

The invention provides a concrete protective agent, comprising the following components by mass percent: 4-8% of fluorocarbon compound, 2-4% of cosolvent and the balance of deionized water. The concrete protective agent provided by the invention has high permeability, and can rapidly permeate into pores below the concrete surface; the depth can be up to 5-10mm; crosslinking reaction is carried out on the pore walls, so as to form a protective layer. The surface energy of the concrete is greatly reduced by the protective layer; the numerical value is not only much lower than the surface tension value of water, but also lower than the surface tension values of animal and vegetable fats and mineral oil; the concrete has waterproof and oilproof efficacies; adhesion of greasy dirt substances also can be effectively prevented. A method for preparing the concrete protective agent is also provided by the invention.

The invention discloses a method and system for measuring the surface tension of liquid metal in a welding pool in real time. According to the method, the method comprises the steps of: projecting laser stripes reflected after light beams emitted by a laser irradiate the surface of a molten pool generating a molten pool oscillation phenomenon in real time, and obtaining the change condition of the laser stripes; measuring a molten pool temperature field image at the arc quenching moment; converting the laser stripe change condition into a molten pool oscillation time domain signal, and performing fast Fourier transform on the time domain signal to extract the molten pool oscillation frequency; according to a molten pool temperature field in the image, obtaining the average temperature of the surface of the molten pool under the temperature field, and calibrating and measuring the width of a metal melting point isotherm in the image to extract the front width of the molten pool; and substituting the molten pool oscillation frequency, the average temperature of the molten pool surface and the front width of the molten pool into the model to obtain the surface tension of the liquid metal of the welding pool at the current moment. According to the method, the surface tension value better fitting the reality can be obtained according to different welding conditions, the sampling rate is high, the signal-to-noise ratio is high, and equipment is simple.