Proton Conductance at Elevated Temperature: Formulation and Investigation of Poly(4-Styrenesulfonic Acid)/4-Aminobenzylamine/Phosphoric Acid Membranes

Abstract

Aminobenzylamine (ABA) and phosphoric acid (PA) were blended in various proportions with poly(4-styrenesulfonic acid) (PSSA) to form a new group of membranes exhibiting proton conductance under water-free conditions. The 4-ABA molecule, possessing an aniline-like and benzylamine-like functional group, can interact both with the PA and the PSSA via nucleophilic interaction, thereby allowing proton jumping in the structure. Physico-chemical and thermal characteristics of the prepared solid membranes were investigated by IR spectroscopy and thermogravimetric analysis, respectively. Electrochemical impedance spectroscopy was employed to investigate their proton-conductance properties. Transparent composite membranes were prepared. However, the membranes are opaque for relatively high content of PA. These membranes are thermally stable up to 300°C. The proton conductivity increases with temperature and also with content of PA. Values as high as 1.8 10 −3 S cm −1 were measured at 190°C in fully anhydrous condition.

Structural Characteristics and Proton Conductivity of the Gel Within the Electrosensory Organs of Cartilaginous Fishes

“…These features are fingerprints of materials with predominant ionic conductivity (24). We calculated the conductivity using a simple equivalent circuit ( Figure 4C) (25)(26)(27). For native AoL gel, we calculated the effective conductivity to be 5 ± 3.5 mS cm -1 , which is consistent with the value of the conductivity (2 ± 1 mS cm -1 ) of AoL gel from other cartilaginous fish species measured previously (8) using transmission line measurement devices.…”

Colloidal Structure and Proton Conductivity of the Gel within the Electrosensory Organs of Cartilaginous Fishes

“…These features are fingerprints of materials with predominant ionic conductivity (Bureekaew et al, 2009). We calculated the conductivity using a simple equivalent circuit (Figure 5C) (Guo et al, 2020;Jalili and Tricoli, 2014;Soboleva et al, 2008). For native AoL gel, we calculated the effective conductivity to be 5 G 3.5 mS cm À1 , which is consistent with the value of the conductivity (2 G 1 mS cm À1 ) of AoL gel from other cartilaginous fish species measured previously (Josberger et al, 2016) using transmission line measurement devices.…”

Stretchable Hole Extraction Layer for Improved Stability in Perovskite Solar Cells

“…To confirm the chemical structure of the copolymerized P­(SS-co-TFPMA)-g-PEGMA, Fourier transform infrared spectroscopy (FT-IR) spectra in the range of 500–4000 cm –1 were measured (Figure b). , The graft copolymerization of PEGMA and P­(SS-co-TFPMA) was confirmed by the increased peak intensity at 1720 cm –1 , which represents the CO of TFPMA and PEGMA. The intensity of peaks at 1720 cm –1 indicates that the PSS has been successfully modified to P­(SS-co-TFPMA) and P­(SS-co-TFPMA)-g-PEGMA.…”