Details

Autor(en) / Beteiligte

• Sedaghat, Esmat
• Rostami, Abbas Ali
• Ghaemy, Mousa
• Rostami, Ali

Titel

Characterization, thermal degradation kinetics, and morphological properties of a graphene oxide/poly (vinyl alcohol)/starch nanocomposite

Ist Teil von

• Journal of thermal analysis and calorimetry, 2019-04, Vol.136 (2), p.759-769

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this study, we synthesized a biodegradable nanocomposite containing starch, polyvinyl alcohol (PVA), and graphene oxide (GO). The non-isothermal degradation kinetics of this nanocomposite was investigated by thermogravimetric analysis. Accordingly, the kinetic parameters, such as activation energy ( E a ), exponential factor ( A ), rate constant ( k ), and degradation time, were calculated. The calculated kinetic parameters are used to predict the lifetime. The master plot analysis showed that the kinetic function of the thermal degradation changed from A 2 to A 3 upon addition of GO to the PVA/starch blend. The reaction heat (Δ H ), glass transition temperature ( T g ), and melting point ( T m ) of the PVA/starch film and PVA/starch/GO nanocomposite were determined by the differential scanning calorimetry analysis. Also, the T g values were determined by dynamic mechanical thermal analyzer. The changes in peak bandwidth, strength, and frequency in the samples are identified by FTIR spectra. The structure and morphology of the nanocomposite were studied by X-ray diffraction analysis and field emission scanning electronic microscope.