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Influence of the synthesis parameters on the thermal behavior of some ZnO–starch composites |
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| Authors: | Bogdan Jurca Alina Tirsoaga Adelina Ianculescu Oana Carp |
| Institution: | 1. Physical Chemistry Department, University of Bucharest, Bd. Elisabeta 4-12, 030018, Bucharest, Romania 3. Politehnica University of Bucharest, Gh. Polizu Street no. 1-7, 011061, Bucharest, Romania 2. Ilie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021, Bucharest, Romania |
| Abstract: | Ten ZnO–starch composites were synthesized using a simple precipitation methodology. The IR spectroscopy and XRD investigations reveal the presence of amorphous starch and crystalline ZnO. The obtained composites present a spherical morphology, 5–8 spheres being interconnected into aggregates. The thermal analysis demonstrates that starch decomposition and ZnO thermally induced nucleation and crystal growth depending on the synthesis parameters such as starch processing (dissolution or gelatinization), reaction temperature (80, 90, and 100 °C), reaction time (15 min or 6 h), and applied treatments (heating or ultrasound irradiation). |
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