1. Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids
- Author
-
Guillermo Reyes, Alistair W. T. King, Orlando J. Rojas, Johanna Lahti, Maryam Borghei, Tampere University, Materials Science, Research group: Paper Converting and Packaging, Department of Chemistry, and Materials Chemistry
- Subjects
Polymers and Plastics ,116 Chemical sciences ,Nanofibers ,Ionic Liquids ,02 engineering and technology ,Welding ,01 natural sciences ,TOXICITY ,law.invention ,chemistry.chemical_compound ,DISSOLUTION ,law ,Imidazoles/chemistry ,Materials Chemistry ,WATER ,Dissolution ,COATINGS ,Cellulose/analogs & derivatives ,Imidazoles ,Nanofibers/chemistry ,NANOCELLULOSE FILMS ,MECHANICAL-PROPERTIES ,021001 nanoscience & nanotechnology ,Artificial ,0210 nano-technology ,BEHAVIOR ,Plastic welding ,Materials science ,Bioengineering ,Context (language use) ,Biodegradable Plastics ,010402 general chemistry ,Biomaterials ,Elastic Modulus ,Fourier transform infrared spectroscopy ,Cellulose ,ta216 ,Membranes ,Membranes, Artificial ,Biodegradable Plastics/chemistry ,0104 chemical sciences ,FTIR ,chemistry ,Chemical engineering ,216 Materials engineering ,Nanofiber ,Ionic liquid ,PAPER ,Ionic Liquids/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's modulus of ∼5.8 GPa. These first attempts for IL "welding" show promise to tune the surfaces of biobased films, expanding the scope of properties for the production of new biobased 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. acceptedVersion
- Published
- 2019
- Full Text
- View/download PDF