Novel method for determination of contact angle of highly volatile liquids

In this paper, a novel method for the measurement of equilibrium contact angle of highly volatile binary liquids is proposed. The proposed method, which combines finite element method and energy equilibration, is able to calculate the solid-liquid contact area. The calculated solid-liquid contact area can then be used to estimate the equilibrium contact angle. Using the proposed approach, the contact angles of binary liquid droplet on a microgrooved and smooth polycarbonate substrate were calculated. The proposed method can be an efficient tool for finding the contact angle of all liquids (both volatile and non-volatile).