Effect of Alcoholic Molecules (2-Propanol) Blending on Exfoliation of Graphite Flakes

In present research, alcoholic molecules (2-Propanol) were blended with Intercalated Graphite to improve expandability of Intercalated Graphite Flakes. Very small amount of 2-Propanol rapidly increases expandable volume. Exfoliation characteristics were also improved. Various analysis were carried out to determine total volume expansion, microstructure and planer deformation. Results were compared with that of some conventional methods. Results show that blending of 2-Propanol with acid intercalated compound gives volume expansion up to 2-3 times higher than that of conventional methods. XRD analysis shows that characteristic peak of graphite at 2 = 26o referring 002 reflections was found weakened in Exfoliated flakes with 2-Propanol blending. This shows disruption of planer structure and conforms high degree of planer deformation indicating high degree of exfoliation in 2-Propanol blending method as compared to other methods. SEM micrographs are also evidencing good exfoliation. Proposed theory behind above mentioned results is that, alcoholic molecules like 2-Propanol reacts with acidic functionality present on the intercalated flakes and gets attached on planer edges. On the edge of graphitic plane, these molecules act as obstacle to diffusing gases resulting in increased pressure of decomposition gases. These more pressurized gases move planes more apart to each other resulting in high volume expansion.