A super-hydrophilic graphite directly from lignin enabled by a room-temperature cascade catalytic carbonization.

Bioresour Technol

Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, PR China.

Published: June 2024

AI Article Synopsis

  • - A new method is introduced for turning lignin into graphite at room temperature, achieving a high yield of 87% and notable properties like a strong negative surface potential and super-hydrophilicity.
  • - The super-hydrophilic graphite can easily mix with polar solvents, making it useful for various applications, especially when combined with liquid metals for creating electrical circuit patterns.
  • - These electrically conductive patterns retain strong performance even when flexed or twisted, paving the way for innovative designs in flexible electronics, sensors, and biomedical devices.

Article Abstract

A cost-effective, and low-energy room-temperature cascade catalytic carbonization strategy is demonstrated for converting lignin into graphite with a high yield of 87 %, a high surface potential of -37 eV and super-hydrophilicity. This super-hydrophilic feature endows the lignin-derived graphite to be dispersed in a variety of polar solvents, which is important for its future applications. Encapsulating of liquid metals with the graphite for electrical circuit patterning on flexible substrates is also advocated. These written patterns show superb conductivity of 4.9 × 10 S/m, offering good performance stability and reliability while being repeatedly stretched, folded, twisted, and bent. This will offer new designs for flexible electronic devices, sensors, and biomedical devices.

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http://dx.doi.org/10.1016/j.biortech.2024.130802DOI Listing

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