| 초록 |
Cellulose is the most abundant, inexpensive and readily available carbohydrate polymer in the world. In contrast to plant cellulose, bacterial cellulose (BC), with several remarkable physical properties, can be grown to any desired shape and structure to meet the needs of different applications. However, BC alone has limited capabilities to fulfill current demand on high-performance materials. In this study, BC was liquefied in polyethylene glycol - ethylene glycol, with sulfuric acid as a catalyst. The liquefied BC was mixture with hydroxyl-terminated polybutadiene and isophorone diisocyanate to prepare polyurethane, under different NCO/OH molar ratios. Polyurethane was analyzed by fourier transform infrared analysis, tensile stress-strain tests, thermo gravimetric analysis, differential scanning calorimetry. |
