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Lignin-Based Polyurethane: Recent Advances and Future Perspectives.

Xiaozhen Ma1,2, Jing Chen1,2, Jin Zhu1,2

  • 1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.

Macromolecular Rapid Communications
|November 18, 2020
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This study explores using lignin, a renewable resource, to create bio-based polyurethanes (PU). Lignin-based PUs offer enhanced properties and environmental benefits over petroleum-derived materials.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Green Chemistry

Background:

  • Polyurethanes (PU) are versatile polymers derived from petroleum, raising environmental concerns.
  • Renewable feedstocks are sought for sustainable PU production.
  • Lignin, an abundant biomass component, offers a potential alternative due to its hydroxyl groups.

Purpose of the Study:

  • To review recent advancements in synthesizing bio-based polyurethanes using lignin and modified lignin.
  • To focus on the application of lignin-based polyurethanes in elastomers and foams.
  • To discuss the opportunities and challenges associated with lignin utilization in PU.

Main Methods:

  • Summarizing recent research on lignin modification and its incorporation into polyurethane synthesis.
  • Investigating the properties imparted by lignin, such as UV-blocking, hydrophobicity, and flame retardancy.
  • Analyzing challenges including isolation, heterogeneity, aggregation, steric hindrance, and activity.

Main Results:

  • Lignin-based polyurethanes demonstrate potential for enhanced functionalities.
  • Lignin offers a sustainable alternative to petroleum-based feedstocks for PU.
  • Challenges in lignin processing and integration require further research.

Conclusions:

  • Lignin is a promising renewable resource for developing advanced bio-based polyurethanes.
  • Overcoming current challenges will unlock broader applications for lignin-based PUs.
  • Further research is needed to optimize synthesis and address limitations for industrial viability.