Sigma Xi Poster Competition
Ionic Liquid-Functionalized Cellulose Derivatives: Synthesis, Characterization, and Properties
Academic Level at Time of Presentation
Senior
Major
Biochemistry
Minor
Biology
2nd Student Academic Level at Time of Presentation
Junior
2nd Student Major
Biochemistry
2nd Student Minor
Biology
List all Project Mentors & Advisor(s)
Dr. Kevin Miller, PhD
Presentation Format
Poster Presentation
Abstract/Description
As cellulose represents an inexpensive and sustainable biomacromolecule, the ability to functionalize the backbone with an ionic liquid and generate conductive materials is of great interest. Here, several 1,2,3-triazolium-functionalized cellulose derivatives were prepared using an azide-alkyne “click” cyclization strategy, followed by quaternization. Thermal, conductive, and morphological properties of the resulting materials were analyzed using a diverse set of techniques, including nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray scattering, and dielectric relaxation spectroscopy (DRS). All of the IL-functionalized cellulosic materials exhibited a Tg, the values of which were inversely dependent upon the size of the counteranion. The materials were amorphous in nature, showing clear nanophase separation which was also dependent upon the counteranion size. Ionic conductivity of the IL-functionalized materials was 6-orders of magnitude higher than native cellulose. Further tethering of an additional IL (imidazolium) moiety to the 1,2,3-triazolium linkage led to a decrease in Tg and an increase in ionic conductivity.
Spring Scholars Week 2022 Event
Sigma Xi Poster Competition
Ionic Liquid-Functionalized Cellulose Derivatives: Synthesis, Characterization, and Properties
As cellulose represents an inexpensive and sustainable biomacromolecule, the ability to functionalize the backbone with an ionic liquid and generate conductive materials is of great interest. Here, several 1,2,3-triazolium-functionalized cellulose derivatives were prepared using an azide-alkyne “click” cyclization strategy, followed by quaternization. Thermal, conductive, and morphological properties of the resulting materials were analyzed using a diverse set of techniques, including nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray scattering, and dielectric relaxation spectroscopy (DRS). All of the IL-functionalized cellulosic materials exhibited a Tg, the values of which were inversely dependent upon the size of the counteranion. The materials were amorphous in nature, showing clear nanophase separation which was also dependent upon the counteranion size. Ionic conductivity of the IL-functionalized materials was 6-orders of magnitude higher than native cellulose. Further tethering of an additional IL (imidazolium) moiety to the 1,2,3-triazolium linkage led to a decrease in Tg and an increase in ionic conductivity.