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Divanillin Cross-Linked Recyclable Cellulose Networks.

Meiling Zhang1,2, Sathiyaraj Subramaniyan1,3, Minna Hakkarainen1,3

  • 1KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, 10044, Sweden.

Macromolecular Rapid Communications
|March 26, 2025
PubMed
Summary
This summary is machine-generated.

New cellulose networks (SBHEC) offer enhanced stability and mechanical properties. These dynamic covalent materials are mechanically reprocessable and chemically recyclable, promoting closed-loop systems.

Keywords:
cellulosecircular materialscovalent adaptable networksrecyclingvanillin

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Sustainable Chemistry

Background:

  • Cellulose is a renewable biopolymer with vast potential but limited inherent mechanical strength and solvent resistance.
  • Developing advanced cellulose-based materials with tunable properties and recyclability is crucial for sustainable applications.

Purpose of the Study:

  • To design and synthesize novel cellulose networks with dynamic covalent crosslinks.
  • To investigate the mechanical properties, thermal stability, and solvent resistance of these new materials.
  • To demonstrate the reprocessability and chemical recyclability of the cellulose networks.

Main Methods:

  • Amino-functionalized 2-hydroxyethyl cellulose (HEC-NH2) was crosslinked with vanillin dimer (VA-CHO) via Schiff base chemistry.
  • The resulting Schiff base cellulose networks (SBHEC) were characterized for their mechanical, thermal, and solvent resistance properties.
  • Reprocessing and closed-loop chemical recycling through imine hydrolysis were investigated.

Main Results:

  • SBHEC films exhibited improved thermal stability and solvent resistance, including water stability, compared to parent materials.
  • Crosslinked networks showed enhanced mechanical properties such as higher glass transition temperatures, elastic modulus, and tensile strength.
  • Materials demonstrated facile reprocessing via hot pressing and effective chemical recycling to recover original building blocks.

Conclusions:

  • Dynamic covalent cellulose networks (SBHEC) offer a promising route to advanced, stable, and recyclable cellulose materials.
  • The developed materials contribute to sustainable polymer design and closed-loop recycling systems.
  • Schiff base chemistry provides an effective strategy for creating adaptable and robust cellulose-based materials.