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December 18, 2017, 01:04:03 PM*
Topic: What is SUrface energy?  (Read 3759 times)
What is SUrface energy? « on: May 16, 2007, 01:44:23 AM »
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The contact angle measurements are also used to calculate the surface energy of the solid surface. As previously noted, the contact angle complexities are present in the measurement, which prevent use of the measurements for energetic calculations. Therefore, to measure the exact surface energy of the solid surface, the following criterion must be satisfied in the contact angle measurement.
1.The Young’s equation must be satisfied in the values of three interfacial energies, LV, LS, and SV. So,   the three-phase contact angle must be Young’s
  contact angle.
2.Pure liquids are always used in contact angle measurement. Also, the
LV remains constant during the measurement.
3.There is no chemical reaction (including desolving) between L/V, S/L,
   and S/V interfaces.
4.The liquid surface tension (LV) of the testing liquids should be higher than that of solid surface tension. So one needs an appropriate choice of the liquids.

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