나노피브릴화 셀룰로오스와 마이크로피브릴화 셀룰로오스의 무용매 아세틸화 = Solven-Free Acetylation of CNFs and CMFs

다국어 초록 (Multilingual Abstract)

Nanocellulose has advantages such as hydrophilicity, low density, high strength property and surface area. But, its hydrophilicity become a problem when it contact with polymer matrix in nanocomposites. So, it is necessary to modify hydrophilicity to hydrophobicity through chemical modification. This work focused on the impact of solvent-free acetylation using iodine and sulfuric acids as a catalyst and compared the properties of acetylated cellulose nanofibrils (CNFs) and cellulose microfibrils (CMFs). Various techniques such as attenuated total reflectance infrared (ATR-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and contact angle (CA) measurement were conducted to obtain degree of substitution (DS), crystallinity, thermal stability, and wettability.