Journal
POLYMERS
Volume 13, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/polym13111767
Keywords
industrial pulp; cellulose films; superbase ionic liquids; IL quantification; mechanical properties
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Funding
- FCT [POCI-01-0145-FEDER-029742]
- University of Coimbra from FCT [REEQ/481/QUI/2006]
- POCI-2010
- FEDER funds through the program COMPETE-Programa Operacional Factores de Competitividade
- national funds through FCT-Fundacao para a Ciencia e Tecnologia [UID/EMS//00285/2020, UIBD/00511/2020]
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In this study, transparent films were produced by solubilizing industrial cellulose pulp in ionic liquids and regenerating it. The films exhibited good elongation properties and were characterized using various analytical techniques. The potential of this methodology for preparing new biobased films was demonstrated through mechanical property evaluations.
Due to environmental concerns, more attention has been given to the development of bio-based materials for substitution of fossil-based ones. Moreover, paper use is essential in daily routine and several applications of industrial pulp can be developed. In this study, transparent films were produced by industrial cellulose pulp solubilization in tetramethylguanidine based ionic liquids followed by its regeneration. Films were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), UV/Vis spectroscopy, proton nuclear magnetic resonance (H-1-NMR), dynamic scanning calorimetry (DSC), thermal analysis (TG), and X-ray diffraction (XRD). Mechanical tests showed that films have a good elongation property, up to 50%, depending on ionic liquid incorporation. The influence of the conjugated acid and dissolution temperature on mechanical properties were evaluated. These results revealed the potential of this methodology for the preparation of new biobased films.
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