An Investigation of Chitosan-Grafted-Poly(vinyl alcohol) as an Electrolyte Membrane

Table 4

Ionic conductivities from the impedance method, methanol permeabilities, together with the selectivities, 𝜎/𝑃_𝑆, of the membranes.

Membrane	σ, ionic conductivity	𝑃𝑆×10^6, methanol permeability	𝜎/𝑃𝑆×10^−6
	(mS cm^−1)	(cm^2s^−1)	(mS⋅s⋅cm^−3)
CS	0.69	0.79	0.87
CS_X	1.50	0.60	2.49
CS/PVA	4.05	0.36	11.10
CS/PVA_X	4.17	0.21	20.15
CS-g-PVA/PVA	0.96	0.24	3.92
CS-g-PVA/PVA_X	4.37	0.18	23.95
PVA	1.43	0.24	5.94
PVA_X	2.24	0.14	15.61
Nafion 117	44.82	2.74	16.35