Table 9.

Analysis of statistical significance (p-value) of the changes in water and diiodomethane contact angles, surface free energy values, and components, based on Student’s t-test (N = 20).

Sample	Water Contact Angle, Deg		Diiodomethane Contact Angle, Deg		Surface Free Energy, mJ/m2		Dispersive Component, mJ/m2		Polar Component, mJ/m2
	Mean ± SD	p-Value	Mean ± SD	p-Value	Mean ± SD	p-Value	Mean ± SD	p-Value	Mean ± SD	p-Value
REF	135.0 ± 3.2	–	98.4 ± 5.5	–	10.51 ± 2.28	–	10.18 ± 2.23	–	0.34 ± 0.11	–
V1/1	133.3 ± 2.2	0.033	99.0 ± 4.6	0.345	9.97 ± 1.84	0.188	9.77 ± 1.78	0.248	0.20 ± 0.09	0.001
V2/1	133.0 ± 3.2	0.026	95.5 ± 4.8	0.029	11.68 ± 2.16	0.041	11.33 ± 2.06	0.036	0.35 ± 0.23	0.468
V3/1	136.2 ± 2.5	0.081	99.9 ± 4.1	0.162	9.98 ± 1.77	0.190	9.61 ± 1.67	0.163	0.38 ± 0.17	0.257
V1/5	129.9 ± 1.6	<0.001	98.6 ± 2.8	0.460	9.73 ± 1.22	0.087	9.67 ± 1.18	0.179	0.05 ± 0.06	<0.001
V2/5	131.9 ± 2.7	<0.001	96.2 ± 3.5	0.052	11.10 ± 1.47	0.154	10.88 ± 1.44	0.103	0.22 ± 0.14	0.006
V3/5	132.4 ± 1.3	0.001	98.1 ± 5.0	0.418	10.30 ± 2.33	0.371	10.11 ± 2.20	0.462	0.18 ± 0.14	0.001
V1/10	128.3 ± 1.7	<0.001	99.5 ± 2.3	0.206	9.17 ± 0.92	0.006	9.15 ± 0.92	0.024	0.02 ± 0.03	<0.001
V2/10	127.9 ± 3.3	<0.001	94.1 ± 2.7	<0.001	11.64 ± 1.18	0.022	11.55 ± 1.18	0.007	0.10 ± 0.07	<0.001
V3/10	129.1 ± 2.5	<0.001	99.0 ± 3.8	0.348	9.47 ± 1.56	0.037	9.45 ± 1.56	0.099	0.03 ± 0.03	<0.001