Abstract: PVA, sulfonated poly(ether ether ketone) (SPEEK) and p-aminodiphenylamine (p-ADA) were used as raw mate-rials to prepare PVA/SPEEK/p-ADA electroactive composite membranes through water solution casting method. Nuclear magnetic resonance spectroscopy (1H-NMR) and Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) were employed to characterize the chemical structure of SPEEK and composite membranes. The mechanical properties and electroactivity of PVA and PVA/SPEEK/p-ADA membranes were measured by universal material testing machine and comprehensive electrochemical workstation. The results showed that PVA/SPEEK/p-ADA membrane with 60wt% PVA,35wt% SPEEK and 5wt% p-ADA owned the best integral mechanical properties, as its tensile strength and elastic modulus reached 64 MPa and 2 538 MPa, which were 52% and 122% higher than those of the pure PVA, respectively. Cyclic voltammetry (CV) confirmed a certain electrical activity of the PVA-60%/SPEEK-35%/p-ADA-5% composite membrane from-0.8 V to 0.8 V. Moreover, we also observed a chromic phenomenon of the PVA-60%/SPEEK-35%/p-ADA-5% composite membrane by applying a changing pH environment.
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2018, Vol. 32 
