| 초록 |
Cellulose is ubiquitously available, serving as natural source of various materials that are used widely in our daily life throughout human history. Despite its excellent properties, man has long sought to improve its functionality because of serious limitations. One restriction consists in a sharp drop of mechanical strength after the water absorption. Wet cellulose suffers from microbial decay. Functionalities are also limited by the absence of functional groups except of hydroxyls. However, these numerous groups in macromolecules are beneficial for various chemical treatments and coating. Men started with chemical modifications of cellulose soon after its discovery by Anselme Payen in 1838. Coating with metals and metal oxides termed as the mineralization is an emerging technique which opens up many promising new avenues of cellulose applications.1 Furthermore, it protects from the absorption of water, which brings about a sharp decrease in the mechanical strength and fungi degradation. In this presentation, dimensionally stable aerogels with low density varying between 0.02–0.1 g/cm3 were fabricated from initially nanofibrillated cellulose. They serve as a scaffold for the preparation of superhydrophobic, photocatalytic and self-cleaning materials via the mineralization by methods of green sol-gel chemistry. (1) Y. Shchipunov and I. Postnova, Adv. Funct. Mater., 28, 1705042 (2018). |
