Starch in rubbery and glassy states by FTIR spectroscopy - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Carbohydrate Polymers Année : 2007

Starch in rubbery and glassy states by FTIR spectroscopy

Résumé

The organization of various starch samples varying in molecular structure, organization and moisture content was studied by ATR-FTIR spectroscopy. The comparison of the infrared spectra showed that band intensities in the 1065-870 cm(-1) region can be explained by their mobility related to the glass transition, T-g, which occurs at room temperature in the 15-21% water content range. Spectra analyzed using principal component analysis showed main structure/moisture changes for the 1000/1022 cm(-1) intensity ratio. The helix organization at a short order range was weakly moisture dependant below T-g, whereas the signal became increasingly water dependant with the crystalline/amorphous ratio above T-g. This result is in agreement with the model of liquid crystal structure and mesophase variation: water allows the self-assembly of amylopectin helices leading to layered organized structure.

Domaines

Polymères

Dates et versions

hal-02667004 , version 1 (31-05-2020)

Identifiants

Citer

Isabelle Capron, Paul Robert, Paul Colonna, Maurice Brogly, Veronique V. Planchot. Starch in rubbery and glassy states by FTIR spectroscopy. Carbohydrate Polymers, 2007, 68, pp.249-259. ⟨10.1016/j.carbpol.2006.12.015⟩. ⟨hal-02667004⟩
12 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More