Table 2. IFT of the Brine/Oil Interface with Different Concentrations of TTB-AA and HTB-AA at 25 °C.

AIL	concentration (ppm)	IFT (mN/m)
TTB-AA	0	33.5
	250	14.4
	500	9.1
	1000	8.8
HTB-AA	0	33.5
	250	16.3
	500	10.7
	1000	10.2