0600569 - ÚMCH 2025 RIV CH eng J - Journal Article
Rana, Lata - Kouka, Saffana - Gajdošová, Veronika - Strachota, Beata - Konefal, Magdalena - Pokorný, Václav - Pavlova, Ewa - Starý, Zdeněk - Lukeš, J. - Patočka, M. - Hegrova, V. - Fortelný, Ivan - Šlouf, Miroslav
Thermoplastic starch with maltodextrin: preparation, morphology, rheology, and mechanical properties.
Materials. Roč. 17, č. 22 (2024), č. článku 5474. ISSN 1996-1944. E-ISSN 1996-1944
R&D Projects: GA TA ČR(CZ) TN02000020
Institutional support: RVO:61389013
Keywords : thermoplastic starch * maltodextrin modification * lower viscosity
OECD category: Polymer science
Impact factor: 3.1, year: 2023 ; AIS: 0.508, rok: 2023
Method of publishing: Open access
Result website:
https://www.mdpi.com/1996-1944/17/22/5474DOI: https://doi.org/10.3390/ma17225474

This work describes the preparation of highly homogeneous thermoplastic starches (TPS’s) with the addition of 0, 5, or 10 wt.% of maltodextrin (MD) and 0 or 3 wt.% of TiO2 nanoparticles. The TPS preparation was based on a two-step preparation protocol, which consisted in solution casting (SC) followed by melt mixing (MM). Rheology measurements at the typical starch processing temperature (120 °C) demonstrated that maltodextrin acted as a lubricating agent, which decreased the viscosity of the system. Consequently, the in situ measurement during the MM confirmed that the torque moments and real processing temperatures of all TPS/MD systems decreased in comparison with the pure TPS. The detailed characterization of morphology, thermomechanical properties, and local mechanical properties revealed that the viscosity decrease was accompanied by a slight decrease in the system homogeneity. The changes in the real processing temperatures might be quite moderate (ca 2–3 °C), but maltodextrin is a cheap and easy-to-add modifier, and the milder processing conditions are advantageous for both technical applications (energy savings) and biomedical applications (beneficial for temperature-sensitive additives, such as antibiotics).
Permanent Link: https://hdl.handle.net/11104/0359590