Table 5 Surface tension, interfacial tension and contact angle of the prepared nonionic and hybrid surfactants at CMC and 25 °C.

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

Surfactant

γ, mN m− 1

IFT, mN m− 1

Contact Angle (o)

Blank crude oil

NA

14

130.07

Non-Ionic

NMAE-10

32

0.9

64.94

NMAE-12

27

0.4

52.57

NMAE-14

30

0.7

55.54

Hybrid

AMAES-10

25

0.1

47.34

AMAES-12

20

0.06

40.34

AMAES-14

23

0.08

44.38

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