Proton conduction in lecithins. I. Electrical properties in the dry state

✍ Scribed by István Szundi

• Book ID: 103038074
• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 421 KB
• Volume: 34
• Category: Article
• ISSN: 0009-3084
• DOI: 10.1016/0009-3084(84)90006-9

✦ Synopsis

The electrical conduction of lecithins in the dry state was studied by dielectric spectroscopy using a wide frequency range and different temperatures. From the frequency dependence three impedances were determined which can be related to bulk, electrode and diffusion limited processes. The qualitative picture of the conduction does not change with temperature, it is independent of the nature of the long aliphatic chains and the phase of the lipids. The activation energies of bulk conduction are in agreement with direct current measurements. It is concluded that charge transport occurs in the polar head group regions with the possible involvement of the head group rotational movements. The charge carriers are considered to be ionic in nature, most probably protons.