Technological application of maltodextrins according to the degree of polymerization
Article
-
- Overview
-
- Research
-
- Identity
-
- Additional Document Info
-
- View All
-
Overview
abstract
-
Maltodextrin (MX) is an ingredient in high demand in the food industry, mainly for its useful physical properties which depend on the dextrose equivalent (DE). The DE has however been shown to be an inaccurate parameter for predicting the performance of the MXs in technological applications, hence commercial MXs were characterized by mass spectrometry (MS) to determine their molecular weight distribution (MWD) and degree of polymerization (DP). Samples were subjected to different water activities (aw). Water adsorption was similar at low aw, but radically increased with the DP at higher aw. The decomposition temperature (Td) showed some variations attributed to the thermal hydrolysis induced by the large amount of adsorbed water and the supplied heat. The glass transition temperature (Tg) linearly decreased with both, aw and DP. The microstructural analysis by X-ray diffraction showed that MXs did not crystallize with the adsorption of water, preserving their amorphous structure. The optical micrographs showed radical changes in the overall appearance of the MXs, indicating a transition from a glassy to a rubbery state. Based on these characterizations, different technological applications for the MXs were suggested. © 2015 by The Authors.
publication date
published in
Research
keywords
-
Degree of polymerization; Glass transition temperature; Maltodextrins; Overall appearance; Technological application; Water activity glass; maltodextrin; polysaccharide; water; chemistry; differential scanning calorimetry; hydrolysis; mass spectrometry; molecular weight; polymerization; X ray diffraction; Calorimetry, Differential Scanning; Glass; Hydrolysis; Mass Spectrometry; Molecular Weight; Polymerization; Polysaccharides; Water; X-Ray Diffraction
Identity
Digital Object Identifier (DOI)
PubMed ID
Additional Document Info
start page
end page
volume
issue