Tag Archives: polar component

  • Water Contact Angle as a Quantitative Measurement of Surface Energy


    BTG Lab’s Surface Analyst™ uses contact angle of highly purified water ballistically deposited on a material to determine surface energy.  This surface energy correlates directly to a material’s ability to adhere. Contact angle effectively measures surface energy because of its strong correlation to surface energy. And, water, because of its polar nature, is a good indicator indicator of surface energy. Thus, measuring water contact angle quantitatively determines surface energy.


    Publication of Polar Component of Surface Energy Article

    Water, as a highly polar molecule, is sensitive to the polar component of a surface. However, molecules on a surface bond together in two ways: by both dispersive (non-polar) and polar bonds. Ergo, total surface energy entails a calculation of the polar component and the dispersive or non-polar component of a surface. However, water contact angle is only sensitive to the polar component. This raises the question from customers:

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