Recent Advances in Nanoparticles Enhanced Oil Recovery: Rheology, Interfacial Tension, Oil Recovery, and Wettability Alteration

Table 3

Contact angle data of different NPs.

Entry#	NPs	(°C)	Dispersion media	Contact angle of clean rock	Contact angle after treatment	Ref.
(1)	SiO2	25	Propanol	134	82	[2]
(2)	SiO2	A	Water	122	24	[42]
(3)	SiO2	23	Ethanol	135.5	66	[52]
(4)	SiO2	26	H2O	90	26	[41]
(5)	SiO2	40	H2O	87	25	[41]
(6)	SiO2	50	H2O	83	21	[41]
(7)	SiO2	60	H2O	82	18	[41]
(8)	Al2O3	25	Propanol	134	90	[2]
(9)	Al2O3	26	H2O	90	71	[41]
(10)	Al2O3	40	H2O	87	66	[41]
(11)	Al2O3	50	H2O	83	65	[41]
(12)	Al2O3	60	H2O	82	61	[41]
(13)	Fe2O3	25	Propanol	134	98	[2]
(14)	TiO2	26	H2O	90	57	[41]
(15)	TiO2	40	H2O	87	52	[41]
(16)	TiO2	50	H2O	83	49	[41]
(17)	TiO2	60	H2O	82	46	[41]

A = ambient temperature.