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Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Biocomposite Films Reinforced With Nano Navy Bean Starch: Application and Characterization.

Nora Ali Hassan1,2, Aijun Hu1, Ammar Badran Altemimi3

  • 1College of Food Science and Engineering Tianjin University of Science & Technology Tianjin China.

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|July 8, 2026
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Summary
This summary is machine-generated.

This study developed a novel enzymatically ultrasonicated starch biocomposite film (E-USCF). The E-USCF demonstrated enhanced properties and rapid biodegradability, making it a promising sustainable material.

Keywords:
TGAWVTRbiocomposite filmsbiodegradabilitydynamic light scatteringoptical properties

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biotechnology

Background:

  • Native starch biocomposite films (NSCF) have limitations in mechanical and barrier properties.
  • Developing sustainable and biodegradable films is crucial for reducing environmental impact.

Purpose of the Study:

  • To produce and characterize enzymatically ultrasonicated starch biocomposite films (E-USCF).
  • To evaluate the effect of enzymatically ultrasonicated starch nanoparticles (E-US) on film properties.
  • To compare E-USCF with native starch biocomposite films (NSCF).

Main Methods:

  • Reinforcing native navy bean starch (NS) with varying concentrations of E-US (0.5%–10%).
  • Characterization of physicochemical, mechanical, thermal, and biodegradability properties.
  • Analysis included solubility, pH, breaking strength, thickness, water vapor transmission rate (WVTR), moisture content, swelling, transparency, thermogravimetric analysis (TGA), tensile stress, and strain.

Main Results:

  • E-USCF exhibited increased solubility, pH, breaking strength, and thickness with higher E-US concentrations.
  • WVTR, moisture content, swelling, and transparency decreased with increasing E-US content.
  • Biodegradability reached 87% within 8 days at 10% E-US.
  • TGA showed lower ash residual (19.88%) for E-USCF 10% compared to NSCF (23.95%).
  • Tensile stress and strain decreased with higher E-US incorporation.

Conclusions:

  • Enzymatically ultrasonicated starch nanoparticles act as effective structural reinforcing agents in biocomposite films.
  • E-USCF shows improved physicochemical and biodegradability properties compared to NSCF.
  • The developed E-USCF presents a promising sustainable alternative with tunable properties.