Apparent Surface Free Energy of Polymer/Paper Composite Material Treated by Air Plasma

Table 3

The centration of functional groups on the surface from XPS for the untreated and plasma treated samples.

	Name	% at cont.	Group
Untreated sample	C 1s A	61.1	C-C, C-H
	C 1s B	27.8	C-O-C, C-OH, C-N
	C 1s C	3.4	C=O
	C 1s D	7.7	O=C-O=
	O 1s A	13.7	C=O
	O 1s B	59.3	C-OH
	O 1s C	27.0	O=C-O-
	N 1s A	91.0	Amine
	N 1s B	9.0	N-O
Sample treated with plasma	C 1s A	57.1	C-C, C-H
	C 1s B	25.9	C-O-C, C-OH, C-N
	C 1s C	7.2	C=O
	C 1s D	9.7	O=C-O=
	O 1s A	18.4	C=O
	O 1s B	55.8	C-OH
	O 1s C	25.8	O=C-O-
	N 1s A	14.6	Imine
	N 1s B	66.8	Amine
	N 1s C	18.6	N-O