Molecular dynamics of carboxymethyl κ/ι-hybrid carrageenan films doped with NH4I. Issue 8 (24th May 2019)

• Record Type: Journal Article
• Authors: Torres, Fernando G.; Arroyo, Junior; Alvarez, Ricardo; Rodriguez, Sol; Troncoso, Omar; López, Daniel
• Is Part Of: Polymer-plastics technology and materials. Volume 58:Issue 8(2019)
• Page Start: 889
• Page End: 902
• Publication Date: 2019-05-24
• Subjects: Carrageenan -- carboxymethylation -- ammonium iodide doping -- solid electrolytes; Polymers -- Periodicals; Polymerization -- Periodicals; Plastics -- Periodicals; Plastics; Polymerization; Polymers; Periodicals; 668
• DOI: 10.1080/03602559.2018.1542713
• Languages: English
• ISSNs: 2574-0881

Abstract

ABSTRACT: The effect of carboxymethylation and NH4 I incorporation on the molecular dynamics of carrageenan films was studied. Broadband Dielectric Spectroscopy (BDS) assessed the presence of α and β relaxation processes. The effect of NH4 I content was analyzed using the Havriliak-Negami model and parameterizing the temperature dependence of the relaxation times according to the Vogel-Fulcher-Tammann-Hesse (VFTH) equation. The glass transition temperature was found to decrease with the increase of NH4 I content. These results suggest that carboxymethylation and the salt doping treatment increase the molecular mobility of NH4+ ions, making the films suitable for the development of solid electrolytes for energy storage applications. Graphical Abstract: