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Double-crosslinked cellulose nanofiber based bioplastic films for practical applications.

Kangyun Lee1, Youngho Jeon1, Dabum Kim1

  • 1Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea.

Carbohydrate Polymers
|March 13, 2021
PubMed
Summary

Researchers developed high-performance cellulose films using dual-crosslinking of cellulose nanofibers (CNFs). This novel method enhances bioplastic properties, offering a promising, eco-friendly alternative to conventional plastics.

Keywords:
BioplasticCelluloseDouble crosslinkingTEMPO-oxidized cellulose nanofiber

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Carbohydrate-based bioplastics show promise but face fabrication challenges.
  • Developing high-performance, single-material bioplastics remains a significant hurdle.

Purpose of the Study:

  • To propose a simple approach for fabricating high-performance cellulose films.
  • To create dual-crosslinked cellulose nanofibers (DC TEMPO-CNFs) for advanced bioplastics.

Main Methods:

  • Chemically crosslinking TEMPO-CNF suspensions with epichlorohydrin (ECH).
  • Physically crosslinking TEMPO-CNF matrices using Ca²⁺ ions for electrostatic interactions.
  • Fabricating dual-crosslinked 2,2,6,6-tetramethylpiperidine-1-oxy-oxidized cellulose nanofibers (DC TEMPO-CNFs).

Main Results:

  • Optimized DC TEMPO-CNF films achieved 90% transmittance and 303 MPa tensile strength.
  • DC TEMPO-CNF films exhibited superior thermal stability and water resistance compared to non-crosslinked films.
  • The dual-crosslinking strategy effectively enhanced cellulose film performance.

Conclusions:

  • The developed method provides a simple and environmentally friendly route to practical polysaccharide bioplastics.
  • Dual-crosslinking of cellulose nanofibers offers a viable strategy for high-performance bioplastic fabrication.
  • This approach could lead to the widespread adoption of sustainable bioplastics.