Rheological Characterization of Starch Gelatinization: Effects of plasticizer/starch ratio and clay content in corn-starch/glycerol thermoplastic starch (TPS). Issue 1622 (7th January 2014)

• Record Type: Journal Article
• Authors: Lara, Sandra; Salcedo, Felipe
• Is Part Of: MRS proceedings. Issue 1622:(2014)
• Publication Date: 2014-01-07
• Subjects: viscoelasticity, -- biomaterial, -- sol-gel; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2014.8
• Languages: English
• ISSNs: 0272-9172

Abstract

ABSTRACT: This work presents a systematic rheological study of the gelatinization process of corn-starch plasticized with glycerol, showing the effects of the glycerol/starch ratio, water/starch ratio, and clay (montmorillonite) content. Gelatinization temperatures at different heating rates in rheological oscillatory temperature-sweep experiments were determined for different corn-starch/glycerol/clay formulations. The influences of the different formulation variables on the gelatinization processes and on the gel properties are analyzed. Some hypotheses postulating how the different intermolecular interactions present in the composites are responsible for these effects are discussed.