The Radian series DCA analyzers offer extraordinary value as the most robust and sensitive surface analyzers and tensiometers in their class.
Exceptional sensitivity and accuracy with better ease of use than the traditional Goniometers and Drop Methods.
The only Tensiometer in the market to analyze a single fiber and bundles of fibers.
A complete package to get started, and offered with extensive accessories.
Product Detail
The Thermo Cahn Radian Series Analyzers offer powerful and versatile approaches to the comprehensive understanding of the complex interactions at liquid-liquid and liquid-solid surfaces. Whether you need to improve adhesion, apply a coating or modify a surface, a Thermo Cahn DCA system provides solutions for:
Surface energies, wettability, cleanliness and topographical homogeneity of solid sheets, films, and fibers
Surfactant analysis with the automatic Critical Micelle Concentration, CMC, program
Dry material absorption, wicking rate.
Contact angle of powders, Washburn Method
Automated dynamic contact angle (DCA) instruments overcome the limitations of static contact angle measurement devices by measuring much larger surfaces on liquid solutions rather than single drops on a plate. This eliminates the risk of concentrated contaminants or incomplete profiles. DCAs operate by holding a plate in a fixed vertical position, attaching it to a microbalance and moving a probe liquid contained in a beaker at constant rate up and down past the plate. A unique contact angle hysteresis curve is produced by the microbalance as it measures the force exerted by the moving contact angle in advancing and receding directions.
The dynamic contact angle is then calculated from the modified Young’s equation (Wilhelmy equation) cos Ø = Force /(surface tension x wetted perimeter). This system can be applied to most solid surfaces including single fibers as small as 1 µm in diameter. Contact angle measurements obtained by Thermo Cahn DCA range from 0° to 180° with a precision of ± 0.001. Wetting is an effect commonly characterized by a zero, or close to zero, contact angle that allows a liquid to easily spread over a solid surface.
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