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Table 3 Energy properties of conditioned surfaces including the total surface free energy, the Lifshitz-van der Waals component, the Lewis acidbase properties, the electron acceptor component, the electron donor component and the surface hydrophobicity

From: Purification and characterization of a surfactin-like molecule produced by Bacillus sp. H2O-1 and its antagonistic effect against sulfate reducing bacteria

SURFACE/TREATMENT γLW(mJ/m2) γ-(mJ/m2) γ+(mJ/m2) γAB(mJ/m2) γTOT(mJ/m2) ΔGlLw(mJ/m2)
Control 42.02 2.68 0.85 −3.03 41 −98.7
AMS H2O-1 57.22 0.95 26.94 −10.11 47.11 −13.8
Surfactin 68.57 0.5 42.16 −9.19 59.39 23.7
Control 29.03 2.59 1.6 −4.07 24.96 −119.1
AMS H2O-1 47.08 0.04 14.03 −1.46 45.62 −51.0
Surfactin 62.71 0.63 54.11 −11.64 51.07 39.3
CARBON STEEL       
Control 75.55 2.81 40.71 −21.37 54.17 17.7
AMS H2O-1 64.68 3.5 7.68 −10.37 54.31 −81.0
Surfactin 71.69 1.5 49.77 −17.27 54.42 30.2
GALVANIZED STEEL       
Control 35.09 0.66 4.93 −3.61 31.48 −97.9
AMS H2O-1 16.69 1.24 43.14 −14.61 2.08 −6.8
Surfactin 49.71 1.72 64.89 −21.1 28.61 42.7
POLYSTYRENE       
Control 43.87 1.45 9.78 −7.53 36.34 −69.3
AMS H2O-1 62.1 1.07 18.77 −8.95 53.15 −32.1
Surfactin 48.01 0.37 8.96 −3.62 44.4 −70.5