Table 10. Zeta Potential Values of Several DESs at Different Concentrations.

author	shale sample	inhibitor	inhibitor conc.	zeta potential value (mV)
Jia et al. (2019a)	Na-bent	CU-DES	0 w/v %	–42.20
Jia et al. (2019a)	Na-bent	CU-DES	0.05 w/v %	–32.15
Jia et al. (2019a)	Na-bent	CU-DES	0.1 w/v %	–29.01
Jia et al. (2019a)	Na-bent	CU-DES	0.3 w/v %	–26.91
Jia et al. (2019a)	Na-bent	CU-DES	0.5 w/v %	–24.38
Jia et al. (2019a)	Na-bent	CU-DES	1 w/v %	–19.40
Jia et al. (2019a)	Na-bent	CU-DES	2 w/v %	–16.78
Jia et al. (2019b)	Na-bent	CM-DES	1 w/v %	–21.20
Jia et al. (2019b)	Na-bent	CIM-DES	1 w/v %	–18.90
Jia et al. (2019b)	Na-bent	CP-DES	1 w/v %	–15.2
Ma et al. (2021)	Na-bent	urea-DES	5 wt %	–8.7
Ma et al. (2021)	Na-bent	gly-DES	5 wt %	–1.73
Ma et al. (2021)	Na-bent	oxa-DES	5 wt %	–4.12
Ma et al. (2021)	Na-bent	cit-DES	5 wt %	–1.96