Technological Application of Maltodextrins According to the Degree of Polymerization

Molecules

Zenaida Saavedra-Leos³  César Leyva-Porras²  Sandra B. Araujo-D໚z¹  Alberto Toxqui-Terán²  Anahí J. Borrás-Enríquez⁴ 

[1] Doctorate Institutional in Engineering and Materials Science (DICIM), Sierra Leona 530, Lomas, 2nd. Section, 78210 San Luis Potosi, San Luis Potosi, Mexico;Advanced Materials Research Center (CIMAV), Alianza Norte 202, Research and Technological Innovation Park (PIIT), 66600 Apodaca, Nuevo Leon, Mexico;;Academic Coordination, Altiplano Region, Autonomous University of San Luis Potosi, Road Cedral km. 5+600, 78700 Matehuala, San Luis Potosi, MexicoFaculty of Chemistry Sciences, Autonomous University of San Luis Potosi, Manuel Nava 6, 78290 San Luis Potosi, San Luis Potosi, Mexico;

关键词: maltodextrins;    degree of polymerization;    water activity;    glass transition temperature;    overall appearance;    technological application;   

DOI  :  10.3390/molecules201219746

来源: mdpi

【 摘 要 】

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 (a_w). Water adsorption was similar at low a_w, but radically increased with the DP at higher a_w. The decomposition temperature (T_d) showed some variations attributed to the thermal hydrolysis induced by the large amount of adsorbed water and the supplied heat. The glass transition temperature (T_g) linearly decreased with both, a_w 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.

【 授权许可】

CC BY   
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