- 學位論文
利用原子力顯微鏡量測二氧化矽及 POMA/PCL 電紡絲之力學特性
Measuring Mechanical Properties of Silica and POMA/PCL Electrospun Nanofibers with Atomic Force Microscopy
摘要
本論文主要利用原子力顯微鏡 (Atomic Force Microscope ) 來量測電紡絲之力學特性。實驗中分為靜電紡絲和同軸電紡絲兩大類，在靜電紡絲中，我們做了有序排列和無序排列在不同的直徑大小下楊氏模量(Young’s modulus) 與附著能 (Adhesion energy) 的比較；在同軸電紡絲中我們做了微觀量測和文獻中巨觀量測的比較。 在靜電紡絲的實驗中我們發現到，不同直徑大小的電紡絲楊氏模量與附著能並沒有明顯的不同，但是無序電紡絲的楊氏模量明顯大於有序的電紡絲。而在同軸電紡絲的實驗中，我們拿聚鄰甲氧基苯胺 (POMA) 為殼層，聚己內酯 (PCL) 為核層的同軸電紡絲PA / PC，並摻雜樟腦磺酸 (CPSA) 製備成C-PA / PC 電紡絲，在微觀的量測中發現了C-PA/PC 的楊氏模量會大於PA/PC，但與巨觀的拉伸量測結果卻是相反的。而在AFM 量測中，我們也發現到了，電紡絲的排列、堆疊方式和量測時所選擇的量測點，對楊氏模量的結果，會有很大的影響。
並列摘要
In this study, we measured mechanical properties of silica and POMA/PCL electrospun nanofibers with Atomic Force Microscopy (AFM). We performed a comparison of the young's modulus and adhesionenergy of the aligned and random electrospun nanofibers in differentdiameters. Furthermore, we compared our microscopically measured results with the macroscopically measured results shown in literatures. For the silica electrospun nanofibers, we found that the young’s modulus and adhesion energy of the samples in different diameters were not significantly different, but the young’s modulus of the random nanofibers was significantly larger than the one of the aligned nanofibers. For the POMA/PCL electrospun nanofibers, PA/PC nanofibers have a coreshell structure of poly (ε-caprolactone) (PCL) -poly (o-methoxyaniline) (POMA). PA/PC fibers could be doped with camphorsulfonic acid (CPSA) to form C-PA/PC nanofibers. In our microscopic measurement, we found that the young's modulus of C-PA/PC nanofibers is larger than the one of PA/PC nanofibers. This result is opposite to the one from macroscopic tensile measurement.