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Related Concept Videos

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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Air-Assisted Sprayed Flexible Cellulose Acetate/Chitosan Materials for Food Packaging.

Nasrin Moshfeghi Far1, Ana Kramar2, Javier González-Benito1

  • 1Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Av. Universidad 30, 28911 Leganés, Spain.

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|September 27, 2025
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Summary

Sustainable films from cellulose and chitosan were created using air-assisted solution spraying. These flexible, bioactive films offer enhanced food packaging protection and are produced with lower energy consumption.

Keywords:
air-assisted solution sprayingcellulose acetatechitosanfood packagingmultifunctional materialssolution blow spinning

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biotechnology

Background:

  • Cellulose and chitin are abundant biopolymers with potential for sustainable materials.
  • Developing flexible, bioactive films from these polymers is crucial for advanced applications.

Purpose of the Study:

  • To investigate the preparation of cellulose-chitosan composite films using air-assisted solution spraying (AASS).
  • To evaluate the mechanical, physical, and biological properties of these novel films.

Main Methods:

  • Utilized air-assisted solution spraying (AASS) to create composite films from acetylated cellulose and chitosan.
  • Characterized film morphology, mechanical properties (Young's modulus, tensile strength, strain at failure), wettability, and bioactivity against E. coli.

Main Results:

  • Achieved highly flexible films (Young's moduli < 1 GPa) with excellent mechanical properties (tensile strength > 19 MPa).
  • Increased chitosan content enhanced hydrophobicity and oleophobicity, improving protective qualities for food packaging.
  • A chitosan content of 7.5% w/w demonstrated significant bioactivity against E. coli.

Conclusions:

  • AASS is a viable and efficient technique for producing uniform, flexible, and bioactive cellulose-chitosan films.
  • These films show great promise for sustainable food packaging applications due to their protective and antimicrobial properties.
  • The method offers advantages in terms of faster drying and reduced energy consumption compared to traditional techniques.