Table 2.

Electrokinetic parameters of nonwovens as outlined in the Experimental Section.

Sample ID	Density (g/m2)	Moisture content (%)	IEP pH	Plateau potential (mV)	Swell test K (min−1)	ζ0 (mV)	ζ∞ (mV)	∆ζ	Swell ratio	R2
I	35	9.23	2.0	−27	0.018	−32.7	−29.4	0.101	1.054	0.939
II	45	7.34	2.2	−25	0.001	−25.9	−16.4	0.125	1.069	0.970
III	45	7.18	2.2	−26	0.008	−27.1	−23.5	0.132	1.073	0.953
IV	25	9.25	1.8	−25	0.006	−24.7	−22.6	0.083	1.044	0.973
V	35	9.68	2.1	−22	0.005	−21.1	−19.9	0.056	1.029	0.920
VI	55	9.86	2.2	−18	0.007	−18.9	−17.3	0.086	1.046	0.972
VII	35	6.86	2.1	−37	0.004	−35.5	−27.1	0.125	1.069	0.991
VIII	25	4.04	2.2	−61	0.011	−54.6	−45.3	0.171	1.098	0.961
Rayon-polyester	–	–	2.8	−16	0.030	22.3	16.6	0.255	1.158	0.991
Polypropylene	–	–	2.5	−32	0.032	66.1	41.8	0.370	1.259	0.989