ANALYSES OF MECHANICAL REINFORCEMENT FOR CELLULOSE NANOFIBERS/CLAY NANOCOMPOSITES USING X-RAY DIFFRACTION

摘要

In this work, we focused on stress transfer in the composites composed of montmorillonite (MMT) and cellulose nanofibers. We employed mechanically fibrillated cellulose nanofibers (FCN) using microfluidizer and TEMPO-oxidized cellulose nanofibers (TOCN), and also prepared two types of MMT with sodium and quaternary ammonium cations as interlayer ions. We used the cellulose nanofibers as matrixes and the MMTs as reinforcement fillers to prepare nanocomposites by simply mixing both aqueous dispersions. X-ray diffraction method was performed in order to investigate stress transfer systems in these nanocomposites. The TOCN-based nanocomposites showed higher Young's modulus as well as larger stress transfer coefficient than the FCN-based ones, which was attributed to strong interfacial interaction between TOCN and MMT.