. 2020 Oct 23;5(43):27800–27810. doi: 10.1021/acsomega.0c02722

Table 1. Contact Angle Values (Degree) for Untreated and Treated Sandstone Samples with DAX in the Absence and Presence of SN, 5CSN, 7CSN, and 9CSN at a Fixed Temperature of 70 °C and Nanoparticle Dosage of 500 mg·L^–1.

system	mean contact angle	% change	degree differences
untreated sample	<10°
aged	119.5 ± 1.3°
DAX	82.2 ± 0.5°	31.2	37.3 ± 1.3°
500 mg·L^–1 SN	57.7 ± 1.7°	51.8	61.8 ± 1.7°
500 mg·L^–1 5CSN	66.8 ± 2.2°	44.1	52.7 ± 2.2°
500 mg·L^–1 7CSN	70.8 ± 0.3°	40.7	48.7 ± 0.3°
500 mg·L^–1 9CSN	75.3 ± 2.1°	37.01	44.2 ± 2.1°

Table 1. Contact Angle Values (Degree) for Untreated and Treated Sandstone Samples with DAX in the Absence and Presence of SN, 5CSN, 7CSN, and 9CSN at a Fixed Temperature of 70 °C and Nanoparticle Dosage of 500 mg·L–1.