POS3-0810
Pulsed DC-Assisted Resin Impregnation of CNT Films Using Ionic Liquid
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Sumin Heo (Pusan National University)
Co-Author(s)
Abstract
Carbon nanotubes (CNTs) exhibit outstanding electrical, mechanical, and thermal properties. CNT assemblies such as fibers and films have been widely investigated for the development of lightweight structural composites. However, the dense network structure of CNT films severely limits resin infiltration, which remains a major challenge in the fabrication of CNT film-based composites.
To overcome this limitation, an ionic liquid and a direct current (DC) electric field were introduced during processing to loosen the dense CNT network and enhance resin impregnation. The ionic liquid served dual functions as both a curing agent for epoxy and an electrolyte for ion migration. Meanwhile, the conductive network of CNT films enabled electric field-assisted processing during resin impregnation.
Under the applied electric field, ion migration within the CNT network facilitated resin impregnation into the CNT film. Control of the voltage waveform is a key parameter affecting process performance, with an influence comparable to that of the voltage magnitude. In particular, pulsed DC enables more precise control over ion migration and distribution within the CNT network. This periodic modulation improved the impregnation efficiency of the CNT film more effectively than controlling only the voltage magnitude. Enhanced impregnation efficiency resulted in deeper resin penetration and more uniform matrix distribution. Consequently, the tensile strength of the CNT film composites was significantly improved.
To overcome this limitation, an ionic liquid and a direct current (DC) electric field were introduced during processing to loosen the dense CNT network and enhance resin impregnation. The ionic liquid served dual functions as both a curing agent for epoxy and an electrolyte for ion migration. Meanwhile, the conductive network of CNT films enabled electric field-assisted processing during resin impregnation.
Under the applied electric field, ion migration within the CNT network facilitated resin impregnation into the CNT film. Control of the voltage waveform is a key parameter affecting process performance, with an influence comparable to that of the voltage magnitude. In particular, pulsed DC enables more precise control over ion migration and distribution within the CNT network. This periodic modulation improved the impregnation efficiency of the CNT film more effectively than controlling only the voltage magnitude. Enhanced impregnation efficiency resulted in deeper resin penetration and more uniform matrix distribution. Consequently, the tensile strength of the CNT film composites was significantly improved.
