Evaluating the Hydrothermal Stability of Superbase-Based Ionic Liquids in Cellulose Fiber Spinning

Wenwen Fang; Inge Schlapp-Hackl; Michael Hummel; Herbert Sixta

doi:10.1021/acsomega.4c04081

Evaluating the Hydrothermal Stability of Superbase-Based Ionic Liquids in Cellulose Fiber Spinning

ACS Omega. 2024 Oct 4;9(41):42193-42198. doi: 10.1021/acsomega.4c04081. eCollection 2024 Oct 15.

Authors

Wenwen Fang¹, Inge Schlapp-Hackl¹, Michael Hummel¹, Herbert Sixta¹

Affiliation

¹ Department of Bioproducts and Biosystems, Aalto University, Espoo 02150, Finland.

Abstract

This study highlights the substantially improved hydrothermal stability of 7-methyl-1,5,7-triazabicyclo[4.4.0] dec-5-enium [mTBDH]⁺ in [mTBDH][MeOCH₂COO] compared to [mTBDH][OAc], as well as the strong cellulose dissolution capability of [mTBDH][MeOCH₂COO] and excellent spinnability with a maximum draw ratio of 14. These findings demonstrate the high potential of using [mTBDH][MeOCH₂COO] as the solvent to advance Ioncell fiber spinning technology by reducing the hydrolysis rate of [mTBDH]⁺, thereby minimizing loss during solvent recycling processes.