Liquid crystalline, rheological and thermal properties of konjac glucomannan
1998; Elsevier BV; Volume: 39; Issue: 5 Linguagem: Inglês
10.1016/s0032-3861(97)00255-3
ISSN1873-2291
AutoresVipul Davé, Mihir Sheth, Stephen P. McCarthy, Jo Ann Ratto, David L. Kaplan,
Tópico(s)Rheology and Fluid Dynamics Studies
ResumoKonjac glucomannan (KGM) exhibited liquid crystalline (LC) behaviour in aqueous solutions above 7% (w/w) concentrations as was determined by polarized optical microscopy and circular dichroism. The rheological properties of the concentrated LC solutions of KGM exhibited pseudoplastic behaviour. The fibrous extrudates retained a significant degree of flow-induced orientation as was determined by wide angle X-ray scattering, thereby indicating potential applications of KGM as fibres and films. Differential scanning calorimetry experiments showed that a significant degree of interaction occurred between KGM and water and that the KGM gels produced in our study cannot be classified as thermoreversible.
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