本研究係利用羥胺(NH2OH, hydroxylamine)改質聚丙烯腈纖維(polyacrylonitrile fiber, PAN fiber)，形成具有amidoxime之螯合官能基的polyacryloamidoxime fiber，簡稱PAAm fiber。由FT-IR分析改質前後纖維的光譜圖變化，並以EA、AA測其改質率及螯合量。將改質後的PAAm fiber 螯合Ag+並以化學還原法還原Ag+使其形成PAAm-Ag奈米複合纖維。由SEM觀察PAAm-Ag 纖維表面可以得到平均粒徑為23nm~30nm之間的奈米銀顆粒，並可由pH值及溫度加以控制其成長分佈。
　　此外本研究亦以DMF溶劑將PAN fiber溶解後成膜，得到PAN membrane，以相同方法將PAN薄膜改質為PAAm membrane。PAAm membrane螯合Ag+後，以UV-vis吸收光譜研究隨著還原劑濃度、pH值及還原溫度的不同其奈米銀粒子於高分子薄膜基材上之成長機構，並以TEM及SEM觀察奈米銀粒於薄膜內部及表面的粒徑大小分佈情況。於不同還原條件下，反應初期皆可以發現在350nm附近有UV吸收，以TEM觀察薄膜內部，發現無奈米粒子形成，此奈米銀成長階段應為產生銀原子團簇，並未形成奈米銀粒子，直到達某一反應時間下，才漸漸有吸收峰的形成，以TEM觀察亦可證明此奈米粒顆粒的形成。另外於低的pH值下隨著還原劑濃度增加，銀粒子平均粒徑增大但粒徑分佈變得較為狹窄。而內部平均粒徑由4.9nm升至6.2nm，且UV-vis吸收於425nm附近開始有吸收；當pH值增加至鹼性，還原速率增加快速，導致大量還原且奈米粒子開始凝聚在一起。當還原溫度至60℃，還原開始時奈米銀會產生雙分佈，隨著時間增長則此現象消失。本研究亦提出其它還原條件下影響銀奈米成長機構。

　　The polyacrylonitrile fiber(PAN fiber) was modified by hydroxylamine solution to form polyacryloamidoxime fiber (PAAm fiber). FT-IR was used to analyze the modified condition of PAAm fiber, and then, element analyzer(EA) was used to measure the modification rate of PAAm fiber. Amount of silver ions chelated by the PAAm fiber could be determined by Atomic absorption(AA) spectrophotometer. Chelated silver ions of the PAAm fiber were reduced via chemical reduction method to form PAAm-Ag nanocomposite fiber in this study. The average particle size on the PAAm-Ag fiber which observed by SEM was in the range of 23nm and 30nm which could be controlled by different pH values and reducing temperatures.
　　In addition, the mechanism of growing nanoparticles on polymer membrane was observed by the UV-vis absorbance. TEM and SEM could determine the distribution of particle sizes on the surface and inside the polymer membrane. UV-vis absorbance near 350nm was appeared in the initial stage of different reducing condition, but no any nanoparticles appeared in this stage after TEM measurement. Thus, the absorbance was due to the formation of silver clusters, not silver nanoparticles. The average particle size increased and the size distribution became narrowed in low pH value. Particle size inside polymer membrane was from 4.9nm to 6.2nm, and there was a 425nm absorption peak. When the pH value of reaction aqueous is controlled at basic, it caused the nanoparticles to aggregate. Furthermore, as the reducing temperature increased to 60℃, the double distribution of the nanoparticles would be appeared. The mechanism of growing nanoparticles in other reducing conditions will also discussed in my research.

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