- 學位論文
細菌纖維單膜及複合膜之製備研究應用
The study, manufacturing and application of Bacterial cellulose / Composite membrane
摘要
本研究為探討細菌纖維基本物理性質，包括:熱性質、機械性質、透光度、 滲透蒸發過濾程度等。由發酵液所培養出的細菌纖維膜為脆的機械性質,於是基本物理測試中我們添加了天然橡膠、硫化橡膠、丙二醇來探討其中纖維膜的伸長量變化。以冷凍乾燥方式添加PG最能達到增加伸長量的效果，且纖維膜型態良好。此有彈性的BC & PG薄膜未來有機會在工業上應用。 之後我們進ㄧ步嘗試將細菌纖維單膜與靜電紡絲薄膜做結合，並探討複合過程的最佳化條件，最後以12% PLA二氯甲烷溶液且配合適當DMF量為電紡溶液；電紡條件為操作距離12cm，電壓9kv直接電紡在有水的細菌纖維膜上，之後乾燥成複合薄膜，進而做滲透蒸發程序實驗。另外也將電紡後的PLA纖維膜置於培養液中，與細菌纖維ㄧ同發酵，使纖維素可穿透交織PLA薄膜，以培養方式使兩種纖維複合，進而做滲透蒸發程序實驗。
並列摘要
This research was to probed to the physical property including bacterial cellulose, comprehends thermal, mechanical properties, transmittance and the grade into pervaporation process. The mechanical property of bacterial cellulose membrane is highly brittle, so we added natural rubber, vulcanized rubber and propylene glycol to observe the changes in elongation of fiber membranes. The best mode for elongation increasing was immersed propylene glycol through freeze-dried process, therefore morphology of fiber membrane is proved good. These elastic membranes will be widely applied in industry in the near future. In advance, we tried to combine bacterial celluloses and electrospinning and probed the optimum conditions for complex process. The best condition was using 12% PLA in CH2Cl2 solution and adding to suitable amount of DMF; electrospinning distance was 12 cm, and the voltage is 9kv. We used electrospinning on hydrated bacterial cellulose membrane and tried to form the composite membrane which was for pervaporation process. Besides, we used cultivate to form composite fiber. PLA fibers membrane made by electrospinning place in the cultivation liquid, fermenting with bacterial celluloses for employing celluloses crossed between PLA fibers and for pervaporation process.