Ethanolamine piezoelectric hydrogels structured by oleic acid lamellae

• DOI: 10.1016/j.molliq.2024.124185
• Publication Date: 2024-02-03T16:07:49Z
• Authors: Erica Pensini; Stefano Gregori; Alejandro G. Mara...; Saeed Mirzaee Gha...; Zhangfei Su; Aicheng Chen; Nour Kashlan

Ethanolamine and ultrapure water have negligible electrical conductivity, whereas their mixtures are electrically conductive. Their conductivity is maximum with ≈20 wt% (≈7 mol%) ethanolamine relative to water, suggesting the formation of conductive ethanolamine-water clusters. Current vs. voltage curves measured during cyclic voltammetry experiments display hysteresis mixtures, which liquid at 20⁰C. interacts oleic acid a 1:1 mol ratio produce solid, where self assembled into lamellar phases, as shown by X ray diffraction (XRD). Lamellae arrange themselves ribbons, seen polarized light microscopy. These ribbons also upon addition water. Shear rheology shows that containing 90 equimolar amounts gels between frequencies 1–100 rad/s. At 6 rad/s, storage modulus G' loss G" ≈4.5. With either 64 or 95 plastic lower strains. Polarization modulation infrared reflection–absorption spectroscopy sign applied electric potentials affects orientation acyl chains on gold surface. Also, microscopy images reveal mechanical stresses develop in when they subjected fields. This because piezoelectric, experiments, compressed, current flows through them. The decay faster molar excess acid, mechanically weaker therefore relax faster.