| 초록 |
Cellulose is the most abundant biopolymer on earth and has recently attracted attention in various fields due to its biodegradability, recyclability, aspect ratio control, and excellent mechanical properties. CNF (Cellulose nanofibril) made from mechanical/chemical/biological treatment on cellulose can be dispersed in protic solvents via hydrogen bonding. At certain concentration, CNF forms a gel where fibrils are physically linked each other. To understand how hydrogen bonding mediates gelation behaviors, rheological behaviors of CNF would be studied in terms of hydroxyl group number and concentration of protic solvents and further by substituting hydroxyl groups on the CNF with alkylamine. This study would help us to understand a gelation mechanism of CNF and extend its application via proper surface modification methods. Hydrophobicity and chemical composition of surface-modified CNF was monitored by contact angle measurement and XPS analysis, respectively. |
