SciELO - Scientific Electronic Library Online

vol.22 issue5Production of Zirconized SPEEK/Copolysilsesquioxane hybrid membranes for application in Proton Exchange Membrane fuel cellsEffect of hot drawing process on physical and thermal properties of polypropylene fiber containing selective peroxide and comparison with conventional polypropylene fibers author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links



Print version ISSN 0104-1428


ALBINANTE, Sandra R.; PACHECO, Elen B. A. V.; VISCONTE, Leila L. Y.  and  TAVARES, Maria I. B.. Characterization of banana and coconut fibers by high-resolution nuclear magnetic resonance in the solid state. Polímeros [online]. 2012, vol.22, n.5, pp.460-466.  Epub Oct 11, 2012. ISSN 0104-1428.

High-resolution nuclear magnetic resonance analysis, NMR, in the solid-state permitted a detailed molecular dynamic study of natural fibers, including two obtained from the banana tree stems and from coconut fruits. The nuclear relaxation technique was applied to evaluate the domains associated with different mobilities of the fiber components, such as cellulose, hemicellulose and lignin. Experiments were also done to quantify the lignin content using a chemical method. From the relaxation times and the domain curves, fibers with higher lignin content were found to have higher relaxation times, because they present a more rigid structure with aromatic groups.

Keywords : Solid state NMR; nuclear relaxation; natural fibers.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License