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Related Experiment Video

Updated: Jun 23, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Published on: August 10, 2016

Lignin-polyphenol epoxy layer: a multi-functional protective coating cascade-constructed by ionic liquids.

Cheng Li1, Yuting Shi2, Wenzhe Xiao2

  • 1Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Sciences, Beijing Institute of Technology, Beijing 100081, China; Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.

Bioresource Technology
|June 21, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel lignin-polyphenol epoxy resin derived from industrial lignin, offering a sustainable alternative to bisphenol A. The bio-based resin provides excellent anti-corrosion, UV protection, and antibacterial properties.

Keywords:
Antibacterial coatingCorrosion-resistanceEpoxy coatingIonic liquidsLigninMulti-functionality

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Green Chemistry

Background:

  • Traditional epoxy curing agents pose environmental and health risks.
  • Lignin, an abundant industrial byproduct, is a potential source for sustainable chemicals.
  • Bisphenol A substitutes are needed for bio-resin production.

Purpose of the Study:

  • To develop a novel lignin-polyphenol epoxy resin with multi-functional protective properties.
  • To utilize ionic liquids (ILs) as green solvents for lignin modification and epoxy curing.
  • To create a sustainable alternative to conventional epoxy resins and bisphenol A.

Main Methods:

  • Lignin polyphenol was obtained from alkali lignin demethylation.
  • Lignin-based epoxy prepolymers were synthesized using salicylol and epichlorohydrin.
  • A novel epoxy layer was formed by solidification with dicarboxylic acid-based poly(ionic liquids) (PILs).

Main Results:

  • The developed resin layer exhibited excellent anti-corrosion (over 2 months), anti-UV (96% blocking rate), and antibacterial properties.
  • Lignin polyphenols offer more cross-linking sites compared to lignin, enabling high-density curing.
  • The use of ILs facilitated green solvent processing and dynamic physical crosslinking.

Conclusions:

  • A novel, multi-functional lignin-based epoxy resin was successfully synthesized using ILs.
  • This bio-based resin offers a sustainable and high-performance alternative for various applications.
  • The study demonstrates a promising approach for valorizing industrial lignin and developing green chemical processes.