| 초록 |
In this study, we suggest a simple preparation method of anisotropic cellulose film using ionic liquid and halloysite nanotube (HNT). The liquid crystal (LC) phase of cellulose solution was tuned by HNT addition. The dispersed HNT in the solution played as a spacer and gave an extra volume exclusive effect on the solution, helping the LC formation. The phase transition of the solution was observed by polarized optical microscopy (POM). The prepared films showed good transparency with the polarized property. The LC phase transition was also confirmed by rheometer. Using the cellulose/HNT/IL solution, anisotropic film was fabricated by blade-coating. The effect of the anisotropy on the mechanical properties was measured by changing the test direction. This study revealed the effect of rigid spacer on the anisotropic phase formation, which provide fundamental understanding for LC film or fiber formations. |
