Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

Reyes, Guillermo; Borghei Maryam; King, Alistair; Lahti, Johanna

Keywords: nanopaper imprinting, ionic liquids, welding, green chemistry

Abstract

Cellulose nanofiber films (CNFF), were treated via a welding process using ionic liquids (ILs). Acid-base conjugated ILs derived from 1,5-diazabicyclo[4.3.0]non-5-ene [DBN] and 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) were utilized. The removal efficiency of ILs from welded CNFF was assessed using liquid-state nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared spectroscopy (FTIR). The mechanical and physical properties of CNFF indicated surface plasticization of CNFF, which improved transparency. Upon treatment, the average CNFF toughness increased by 27 % and the films reached a Young modulus of ~5.8GPa. These first attempts for IL ‘welding’ show promise to tune bio-based films surfaces, expanding the scope of properties for the production of new bio-based materials in a green chemistry context. The results of this work are highly relevant to the fabrication of CNFFs using ionic liquids and related solvents

Más información

Título de la Revista: BIOMACROMOLECULES
Volumen: 20
Número: 1
Editorial: AMER CHEMICAL SOC
Fecha de publicación: 2019
Página de inicio: 502
Página final: 514
Idioma: English
DOI:

DOI: 10.1021/acs.biomac.8b01554

Notas: WOS