Table 2 In underwater environment, the instantaneous apparent contact angles of different liquids for different membranes, and the Gibbs free energy (ΔG1) for different systems.

From: Liquid-infused interfacial floatable porous membrane as movable gate for ultrafast immiscible oil/water separation

Solid

Oil

R

γw

γo

γw/o

θw

θo

ΔG1

Filter paper

petroleum ether

2

73.89

27.64

62.27

0

0

30.23

Filter paper

n-hexane

2

73.89

27.54

70.58

0

0

22.12

Filter paper

cyclohexane

2

73.89

28.42

65.18

0

0

25.76

Filter paper

CCl4

2

73.89

45.80

43.18

0

0

13.0

CA

petroleum ether

2

73.89

27.64

62.27

49.52

18.61

18.45

CA

n-hexane

2

73.89

27.54

70.58

49.52

20.28

26.18

CA

cyclohexane

2

73.89

28.42

65.18

49.52

19.78

22.60

CA

CCl4

2

73.89

45.80

43.18

49.52

18.19

34.14

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