|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||2D Materials – Preparation, Properties & Applications
||Rapid Exfoliation of Low-defectivity Graphene in Alkali Lignin Aqueous Media
||Claudio Marchi, Harrison Loh, Federico Lissandrello, Konstantinos Sierros, Luca Magagnin
|On-Site Speaker (Planned)
Liquid Phase Exfoliation (LPE) of graphite has been proposed as a scalable and cost-effective method for producing graphene flakes. In this work, alkali lignin is investigated as a non-toxic stabilizer for the rapid (<3h) synthesis of water-dispersible few-layers-graphene (FLG) from commercial acid-intercalated graphite flakes. Time of sonication and lignin-to-graphite ratios are the critical parameters explored for the fine-tuning of the Ultrasonic-Assisted Liquid Phase Exfoliation of the carbonaceous precursor. Raman and UV-Vis spectroscopy are employed as the primary tools for evaluating the quality and nature of the final material. Spectroscopical data processing is conducted according to a range of criteria employed to identify FLG. Morphological investigation of FLG is conducted via SEM and TEM imaging. TGA testing is conducted to assess the amount of residual polymeric stabilizer for ink synthesis optimization. The analysis confirms the absence of significant basal-plane defectivity and the effectiveness of the proposed bio-compatible production route.
||Other, Nanotechnology, Characterization