Superhydrophobic and Ultralow Thermal Insulation

Researchers have different models and means of measuring the thermal conductivity, some of which are sandwiched panel design between two conductive plates (Hunt et al. 1991), guarded hot plate method (Ge et al. 2009), vibrational thermal relaxation technique developed by Bemasconi et al. (1992) and modified Tsao s model predictive theoretical technique (Cheng and Vachon 1969). 

Hydrophobicity is measured through the contact angle (0) of a water droplet on the aerogel surface as shown in Fig. 6.1. Contact angle, 0, is a quantitative measure of wetting of a soUd by a liquid. It is defined geometrically as the angle formed by a 

---