Wettability Investigation of UV/O₃ and Acid Functionalized MWCNT and MWCNT/PMMA Nanocomposites by Contact Angle Measurement

Table 3

Surface energy calculation of treated MWCNT films using GvOC model.

Sample	(mJ/m^2)	(mJ/m^2)	(mJ/m^2)	(mJ/m^2)	(mJ/m^2)
Pure PMMA	24.33	18.10	6.12	1.78	5.26
UV/O3 30 min	44.22	37.70	0.52	0.10	0.65
UV/O3 60 min	69.51	58.73	10.77	2.83	10.22
UV/O3 120 min	74.10	91.26	2.84	0.69	2.92
Acid 6 hours	1.19	0.77	0.41	0.008	5.39
Acid 12 hours	6.83	6.59	0.24	0.11	0.13
Acid 24 hours	26.91	26.07	0.84	0.29	0.59