Fujian contact angle measurement, ShengDing instruments, contact angle measurement provided by the Dongguan City Sheng Ding Precision Instrument Co., Ltd .. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.gdshengding.com) is a specialist in the "contact angle measurement, tensile tester, drop angle detector, tables, interface equipment," the company. Since its inception, we adhere to the "honesty, sound management" approach, the courage to participate in healthy competition in the market, so that the "" brand has a good reputation. We adhere to the "service first, customers first" principle, so ShengDing instrument has won the trust of customers in the congregation dedicated instrumentation, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! The contact angle is defined as the gas, liquid and solid at the intersection by gas - liquid interface tangent and solid - liquid junction angle θ between the lines, is a measure of the degree of wetting. If the contact angle θ90 ° Fujian analyzer, the solids are lyophobic, that the liquid does not wet the solid and easy to move on the surface and can not enter the pores. Wetting process and interfacial tension system related. A drop of the liquid level falling on the solid surface, when equilibrium is reached, subject to the following contact angle formed between each of the interfacial tension and the Young's equation (Young Equation): γs contact angle meter, g = γs, l + γg, l × cosθ can be predicted by its wetting following several situations: 1) when θ = 0, to completely wet; 2) when θ <90 °, part of the wetting or wetting; 3) when θ = 90 °, a wetting whether or not the boundary; 4) when θ> 90 °, no wetting; 5) when θ = 180 °, completely wetted. A capillary phenomenon of the liquid rising, falling height h. h represents the sign of the rise or fall. Infiltration of liquid rises, Jiangxi contact angle measurement, the contact angle is acute; no infiltration of liquid drop, the contact angle is obtuse. Rising height h = 2 * surface tension coefficient / (liquid density * gravitational acceleration g * surface radius R). Rising height h = 2 * surface tension coefficient * cos contact angle / (liquid density * gravitational acceleration g * capillary radius r). Wettability problems with mining flotation, oil, textile, pesticide processing, photographic film production, as well as waterproof paint formulations, washing and so closely related. The contact angle of existing test methods are usually two: one for the shape of the image analysis method; the other for the gravimetric method which is often referred to as a wetting balance or osmosis contact angle meter, but the most widely used, the measured value is best Direct and accurate image analysis method or appearance nanomaterials secondary particle size statistical analysis system, according to the principle of division of the more advanced three typical methods are: high-speed centrifugal sedimentation method, laser particle size analysis and power ultrasonic particle size analysis. Focused laser particle size analysis according to their analysis of different particle size ranges, and is divided into light diffraction, and dynamic light scattering method. Diffraction mainly for micron, submicron particles; scattering law aimed nano, submicron particle size analysis. Electric ultrasonic particle size analysis method is the latest in analytical methods, mainly grain size analysis of high concentration system. Particle size analysis of nanomaterials is characterized by multiple analysis methods, mainly for size analysis of high concentration system. Particle size analysis of nanomaterials is characterized by multiple analytical methods to obtain the equivalent diameter, not horizontal comparison between them. Each analysis methods are applicable to a certain range, and sample conditions, should choose the appropriate analysis method based on the actual situation.