Thermal Stability, Optical Property, and Morphology of Flexible Organoclay Films

摘要

Novel organo-saponite (organo-SPT) films with excellent thermal stability and optical property were synthesized by solution casting. Na ion-exchanged saponite (pristine SPT), hexadecylammonium ion-exchanged SPT (C_(16)-SPT), hexadecyltriphenyl phosphonium ion-exchanged SPT (C_(16)PPh_3-SPT), and tetraphenyl phosphonium ion-exchanged SPT (PPh_4-SPT) were used to prepare clay films. We examined the relationship between the structures and properties of the various SPT films. SPT films were examined by means of wide-angle X-ray diffraction (XRD), electronic microscopy (FE-SEM), thermogravimetric analysis (TGA), ultraviolet-visible (UV-vis.) spectrometer. On the basis of these analyses, we sought to improve both the thermal stability and the optical properties. Clay films composed of C_(16)PPh_3-SPT and PPh_4-SPT were found to be more thermally stable than those composed of pristine SPT or C_(16)-SPT. On the other hand, the transmittance was not significantly affected by variations in the organo-SPT material.