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April 3, 2026BMC ChemistryOpen Access

Exploring morphological and thermal characteristics of chitosan/starch blend films derived from natural sources: incorporating thiourea and urea coupling agents with stearic acid plasticizer

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Authors

MBMagd M. BadrMEMoataz A. ElsawyHNHamdy M. Naguib

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Overview

Exploring the effects of thiourea and urea on chitosan/starch film properties, suggesting improved stability for packaging.

Key Points

  • This research aims to investigate the properties of chitosan/starch blend films enhanced with thiourea and urea coupling agents.
  • Prepared biobased films using chitosan and starch polysaccharides
  • Incorporated thiourea and urea as crosslinkers with stearic acid as a plasticizer
  • Analyzed morphology using Scanning Electron Microscopy (SEM)
  • Evaluated thermal stability with Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA)
  • Calculated kinetic parameters using the Kissinger-Akahira-Sunose (KAS) model.
  • Urea produced a homogeneous film matrix, while thiourea led to a rougher morphology due to agglomeration.
  • Thiourea-modified films exhibited a crystallinity index of 43.2%, significantly higher than urea-modified films at 28.9%.
  • Thiourea composites showed superior thermal stability with approximately 40% residual weight at 600 °C.

Cite This Study

Badr et al. (2026) studied this question.

synapsesocial.com/papers/69cf58fd5a333a8214609cbahttps://doi.org/10.1186/s13065-026-01752-x
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