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Lignin-Based Polyols with Controlled Microstructure by Cationic Ring Opening Polymerization.

Jonatan Perez-Arce1, Ander Centeno-Pedrazo1, Jalel Labidi2

  • 1TECNALIA, Basque Research and Technology Alliance (BRTA), Alava Technology Park, Leonardo da Vinci 11, 01510 Vitoria-Gasteiz, Spain.

Polymers
|March 6, 2021
PubMed
Summary
This summary is machine-generated.

Researchers synthesized lignin-based polyols (LBPs) using cationic ring opening polymerization. This method allows for tailored LBPs, offering a sustainable alternative to fossil-based polyols.

Keywords:
biomass valorizationcontrolled microstructurelignin upgradinglignin-based polyols

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Area of Science:

  • Polymer Chemistry
  • Sustainable Materials Science

Background:

  • Lignin-based polyols (LBPs) offer a renewable alternative to petroleum-based polyols.
  • Controlling the microstructure of LBPs is essential for optimizing their properties and applications.

Purpose of the Study:

  • To synthesize LBPs with controlled microstructures via cationic ring opening polymerization (CROP).
  • To investigate the influence of key reaction parameters on LBP properties.
  • To establish LBPs as a viable alternative to fossil-based polyols.

Main Methods:

  • Cationic ring opening polymerization (CROP) of oxiranes in organosolv lignin (OL) dissolved in tetrahydrofuran (THF).
  • Systematic variation of parameters including molar ratio, OL concentration, temperature, flow rate, and oxirane type.

Main Results:

  • LBPs with tunable hydroxyl numbers (35-217 mg KOH/g) and average molecular weights (5517-52,900 g/mol) were successfully synthesized.
  • Controlled microstructures led to varied thermal properties, with melting temperatures ranging from -8.4 to 18.4 °C.
  • The CROP method demonstrated simplicity and effectiveness in producing tailor-made LBPs.

Conclusions:

  • The CROP of oxiranes in OL/THF solutions provides a straightforward route to engineer LBPs with specific microstructures and properties.
  • These tailor-made LBPs show significant potential for replacing conventional fossil-based polyols in various applications.
  • This research paves the way for the broader adoption of lignin-derived materials in the chemical industry.