Table 7 Work of Adhesion, surface free energy and spreading coefficient at the CMC of the prepared Surfactants.

From: Synthesis a new family hybrid anionic/nonionic surfactant and investigation their physical properties in relation to chemical enhanced oil recovery

Surfactant

Work Adhesion, Wa

(mJ/m2)

Surface Free Energy “Interfacial Free Energy”, γS

(mJ/m2)

Spreading Coefficient, SC

(mJ/m2)

Non-Ionic

NMAE-10

45.55

14.45

−18.45

NMAE-12

43.41

17.67

−10.59

NMAE-14

46.97

16.81

−13.03

Hybrid

AMAES-10

41.94

17.02

−8.06

AMAES-12

35.24

16.50

−4.76

AMAES-14

39.44

15.24

−6.56

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