臺灣博碩士論文加值系統

本研究第一部分為以同步小角/廣角X光散射實驗研究不同溫度下PNIPAM水溶液之微結構變化，首先將SAXS與WAXD強度分布重疊後，將WAXD強度分布以兩個Lorentzian functions作擬合後，將此強度分布從SAXS強度分布中扣除後，從其Iq2對q做圖中發現當溫度上升，q= 0~0.1 Å-1處有一明顯之峰且溫度上升強度愈強，無法只以OZ function作擬合，故引入sphere scattering與OZ function擬合SAXS強度分布[扣除WAXD強度分布]。

第二部分為以低溫電紡設備，藉由將溶液溫度控制在低於相分離溫度來製備PNIPAM奈米纖維。探討改變溶液溫度、工作距離與濃度對電紡過程及產物影響，以CCD及高速攝影機觀察電紡過程，SEM、TEM、POM觀察產物。

In the first part of this study, we use a synchrotron small- and wide-angle x-ray scattering (SAXS/WAXD) to investigate the variation of microstructures of poly(N-isopropyl acrylamide) (PNIPAM) aqueous solutions at different temperature. First, we overlapped the SAXS and WAXD intensity profiles. The SAXS intensity profile subtracted the model, which was used to describe WAXD intensity profiles by two Lorentzian functions. From Iq2 -q plot, we found that there was an obvious peak appealing at q= 0~0.1 Å-1 when the temperature increased, which the SAXS intensity profile subtracting the model cannot be described by only a OZ function; therefore, the SAXS intensity profile subtracting the model was described by sphere scattering and OZ function.

In the second part, the electrospinning was performed at the different solution temperature and concentration how the electrospinning process recorded by the CCD, digital camera and high speed camera and electrospun fibers observed under a scanning electron microscope (SEM), transmission electron microscope (TEM) and polarized optical microscopy (POM) were influenced.

摘要 i
Extended Abstract ii
致謝 x
目錄 xi
表目錄 xiii
圖目錄 xiv
符號 xix
一、前言 1
二、簡介 2
2.1 電紡絲模式 2
2.1.1 dripping mode 2
2.1.2 pulsating mode 2
2.1.3 cone-jet mode 3
2.1.4 multi jet mode 3
2.2 電紡絲實驗之觀察 3
2.2.1 cone和jet形態 3
2.2.2 纖維形態 4
2.3 小角X光散射(SAXS) 4
2.3.1 SAXS 儀器 4
2.3.2 SAXS基本原理 5
2.4 廣角X光散射(WAXD) 6
三、文獻回顧 11
3.1 聚異丙基丙烯醯胺 (Poly (N-isopropyl acrylamide), PNIPAM) 11
3.2 PNIPAM水溶液散射 12
3.3 PNIPAM電紡絲 13
四、實驗 17
4.1 實驗藥品 17
4.2 實驗儀器 17
4.2.1 電紡溶液配製 17
4.2.2 國家同步輻射實驗之分析儀器 18
4.2.3 電紡絲實驗 18
4.2.4 電紡絲分析儀器 19
4.3溶液製備 20
4.4 實驗步驟 20
4.4.1 同步小角/廣角X光散射儀 (synchrotron SAXS/WAXD) 20
4.4.2 電紡絲實驗 21
4.5 分析方法 21
4.5.1 小角X光散射儀 (SAXS) 21
4.5.2 廣角X光繞射儀 (WAXD) 22
五、結果與討論 25
5.1 PNIPAM水溶液之微結構分析 25
5.1.1 PI films及水問題探討 25
5.1.2 PNIPAM水溶液之WAXD分析 25
5.1.3 PNIPAM水溶液之SAXS分析 27
5.2 電紡PNIPAM水溶液 30
5.2.1 溶液溫度對電紡的影響 30
5.2.2 工作距離對電紡的影響 30
5.2.3 溶液濃度對電紡的影響 31
5.2.4 纖維形態 32
六、結論 71
七、參考文獻 72
八、附錄 74

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