Functionalization of Cellulose Fibres with Oxygen Plasma and ZnO Nanoparticles for Achieving UV Protective Properties

Table 2

The elemental composition (C, O, N), O/C ratio concentration and percentage of C-C, C-O, O-C-O, and O=C-O peaks presenting different chemical bonds of carbon atoms.

Sample	Elemental composition (at.%)			Atomic ratio O/C	C-C	C-O	O-C-O	O=C-O
	C	O	N
UN	68.2	30.3	1.5	0.44	40.4	45.9	13.6	0
P_10s	55.3	43.4	1.3	0.78	12.4	52.6	24.9	10.0
P_20s	55.0	44.0	1.0	0.80	14.3	56.0	21.1	8.6
P_30s	54.9	44.2	0.9	0.81	12.4	63.7	18.9	5.0

UN: untreated, P_10 s: oxygen plasma-treated for 10 s, P_20 s: oxygen plasma-treated for 20 s, and P_30 s: oxygen plasma-treated for 30 s.