Radiolytic Synthesis of Vinyl Polymer-Clay Nanocomposite Membranes for Direct Methanol Fuel Cell

Table 2

Physical and electrochemical properties of vinyl polymer-clay nanocomposites membrane for DMFC.

Membrane	Thickness (μm)^a	Proton conductivity (S/cm)^b	Water uptake (%)^c	Ion-exchange capacity (meq/g)^d	MeOH permeability (mmol·cm^−2·s^−1)^e
Number 1	40.0	0.0779	32.4	3.63	7.7 × 10^−9
Number 2	50.0	0.425	22.2	2.83	ND
Number 3	50.0	0.0524	50.4	3.04	4.4×10^−6
Nafion 117	180	0.0721	5.26	0.90	2.2 × 10^−10

aDetermined by venier calipers. ^bDetermined by a AC impedance. ^cDetermined by dropping test. ^dDetermined by titration method. ^eDetermined by GC-FID. ND: not determined.