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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Mini-review on lignin-based self-healing polymer.

Rizki Utami1, My Ha Tran2, Eun Yeol Lee1

  • 1Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), College of Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.

International Journal of Biological Macromolecules
|September 5, 2024
PubMed
Summary

Lignin, a plant-based biopolymer, shows great potential for creating self-healing polymers due to its dynamic chemical properties. This review explores lignin extraction, modification, and synthesis for advanced self-healing materials.

Keywords:
Hydrogen bondLigninSelf-healing polymers

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biotechnology

Background:

  • Lignin, a complex biopolymer from plant biomass, possesses inherent dynamic chemical linkages and functional groups.
  • These characteristics make lignin a promising renewable resource for developing advanced self-healing polymers.
  • Existing research highlights the potential of lignin in creating sustainable and functional materials.

Purpose of the Study:

  • To provide a comprehensive review of lignin-based self-healing polymers.
  • To explore various synthesis and modification strategies for lignin incorporation.
  • To identify challenges and future opportunities in this field.

Main Methods:

  • Review of lignin extraction and chemical modification techniques.
  • Analysis of synthesis methods including reversible addition-fragmentation chain transfer (RAFT) polymerization and crosslinking with polymers like polyvinyl alcohol (PVA) and chitosan.
  • Examination of optimization strategies such as dynamic copolymers, encapsulated healing agents (dicyclopentadiene, polycaprolactone (PCL)), and chain extenders (disulfide, Diels-Alder (DA) moieties).

Main Results:

  • Lignin-based polymers demonstrate self-healing capabilities through hydrogen bonding and dynamic re-associations.
  • The rigid structure of lignin enhances mechanical properties and temperature resistance.
  • Successful synthesis routes include reactions with isocyanates to form reversible networks.

Conclusions:

  • Lignin is a viable and renewable component for high-performance self-healing polymers.
  • Further research is needed to optimize lignin extraction, polymer compatibility, and synthesis/characterization procedures.
  • Lignin-based self-healing polymers offer significant opportunities for sustainable material development.