中文摘要 本研究係將幾丁聚醣(Chitosan)利用濃鹽酸製備出不同分子量的幾丁聚醣，再將其與纖維素於不同比例下摻合製成薄膜，薄膜中聚合物分子的相互作用性質、機械性質可藉由FTIR、SEM及DMA等儀器來探討，而薄膜的抗菌性質則可藉由搖瓶法來測試，確實瞭解薄膜的相關性質，以便掌握成膜之最佳條件，以作為未來可紡性評估的依據。結果顯示，在FTIR光譜圖中官能基並無明顯地改變且在SEM圖中觀察到薄膜具有平滑的表面及結實的剖面。在機械性質的研究中看出強度不會因不同分子量的幾丁聚醣的添加而有所影響。由機械動態分析儀（DMA）了解分子間的性質深受纖維素分子的影響。另外發現當幾丁聚醣的含量大於纖維素時，薄膜具有一良好的抗菌性。根據以上的結果可知，當幾丁聚醣與纖維素重量比為1：1時，薄膜具有最佳的性質。 Abstract In this study, the different molecular weights of chitosan were prepared by adding concentrate hydrochloric acid. The membranes were prepared by different molecular weights of chitosan blend with different composition of cellulose. The interaction of polymer molecules and the mechanical properties of the membranes were investigated by FTIR、SEM and DMA. And the membranes antimicrobial property was examined by shake-flask method. The optimum condition of characteristics assessment of the membranes preparation will be used in future wet spinning research. FTIR spectroscopy results indicated that the functional groups were not changed by blending. SEM shows that the membrane has smooth surface and tough cross section structure. DMA results show that the mechanical properties would not affected by the molecular weights of chitosan but were highly affected by the content of cellulose. Meanwhile, we found that when the content of chitosan more than cellulose, the membrane has a better antimicrobial property. We also found that optimum condition for the membrane preparation is chitosan/cellulose equal 1.
