The Microstructure and Character of the PVDF-g-PSSA Membrane Prepared by Solution Grafting

Abstract

A new method based on a solution-grafting technique was used to prepare poly(vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA) proton exchange membrane. Polystyrene is easily grafted into PVDF, which has been treated in KOH solution. There is a linear relationship between the degree of grafting and the treatment time in KOH solution. Fourier transform infrared spectroscopy and differential scanning calorimetry were used to characterize the changes of the membrane’s microstructure after grafting and sulfonation. The conductivity of the solution-grafted PVDF-g-PSSA membranes was investigated by the four-probe dc technique and reached 1.119×10−1 S cm−1 at 25°C. Gas chromatographic studies show that the methanol permeability of the PVDF-g-PSSA membrane is almost one order of magnitude lower than that of a Nafion-112 membrane. © 2003 The Electrochemical Society. All rights reserved.

Influences of Permeation of Vanadium Ions through PVDF-g-PSSA Membranes on Performances of Vanadium Redox Flow Batteries

“…Finally, the membrane was washed with deionized water to remove the remaining sulfuric acid. 8 2.2. Membrane Characterization.…”

“…7 In our laboratory, we have studied a solution-grafting technique for the preparation of the PVDF-g-PSSA membrane. 8 Some properties of the PVDF-g-PSSA membranes produced by the same method were investigated in this paper. The membranes were measured for their ion exchange capacity (IEC), proton conductivity, water uptake, and vanadium ion permeability in comparison with the Nafion 117 membrane.…”

Surface-modified Nafion membrane by trioctylphosphine-stabilized palladium nanoparticles for DMFC applications

“…The change of methanol concentration with time in reservoir B was measured using a capillary gas chromatographic instrument (HP5890). The methanol permeability was calculated using the following equation, which has already been applied elsewhere [22,23]:…”

A New Class of P(VdF-HFP)-CeO2-LiClO4-Based Composite Microporous Membrane Electrolytes for Li-Ion Batteries

“…It comprises both an amorphous and crystalline phase where an amorphous phase of the polymer support higher ionic conduction and crystalline phase assists to enhance the mechanical strength for the polymer electrolytes [5]. P(VdFco-HFP) based polymer electrolyte is one of the most commonly commercialized plastic lithium ion batteries (PLiON) by Telcordia Technologies (formerly Bellcore) since Gozdz et al found the preparation process of porous membrane [6][7][8][9]. However, in the process di-butyl phthalate (DBP) extraction step is inconvenient since it increases the cost of the preparation.…”