Preparation and Characterization of Nano structured Materials from Fly Ash: A Waste from Thermal Power Stations, by High Energy Ball Milling

Table 3 Surface energy and work of adhesion of fresh as well as ball milled fly ash

Fly ash sample	Surface energy (mJ/m²)		Work of adhesion in water (mJ/m²)	Work of adhesion in formamide (mJ/m²)
Fly ash sample	Polar	dispersive	Work of adhesion in water (mJ/m²)	Work of adhesion in formamide (mJ/m²)
Fresh fly ash	10.85	8.373	74.045	64.86
Ball milled for 40 hours	9.705	13.188	78.398	72.595
Ball milled for 60 hours	0.8724	56.082	83.27	107.214