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研究生: 曾俊豪
Tseng, Chun-Hao
論文名稱: 探討銀奈米粒子於改質之聚丙烯纖維表面形成機制
Study on the mechanism of silver nanoparticles on the modified PP fiber
指導教授: 陳志勇
Chen, Chun-Yung
學位類別: 碩士
Master
系所名稱: 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 79
中文關鍵詞: 電漿誘發聚合法PP纖維銀奈米粒子膨潤
外文關鍵詞: GMA-IDA che, plasma-induced graft polymerization
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  •   本實驗使用質輕、價廉和兼具環保功能的PP人造纖維為基材,利用電漿誘發聚合法將纖維的表面活化並導入具有螯合性官能基的GMA-IDA高分子,形成一無機銀奈米微粒的成核誘發點。其中,紅外光光譜(FTIR)可證實GMA-IDA已成功接枝於PP纖維上,且由EA定量GMA-IDA的接枝。另外,亦使用莫耳變數法求出每莫耳的GMA-IDA可螯合2莫耳的銀離子,而由等溫吸附和吸附動力實驗可知每克的纖維約於40分鐘時可達最大銀螯合量為0.18mg/g of fiber。本實驗分別使用物理和化學方法來還原銀離子,首先,我們將PPG-IAg+纖維含浸於不同pH值的水溶液下,固定還原條件為照射波長為366nm之紫外光30分鐘(光化學還原法),由SEM和TEM觀察結果可看出纖維表面的銀粒子的平均粒徑隨著pH值的增加而減小,平均粒徑分別為:pH=2時(126.6) nm、pH=5時(52.2 nm)、pH=8時(32.4 nm)和pH=11時(16.5 nm),這是因為當水溶液的pH值增加時,GMA-IDA分子中的酸根傾向形成-COO-結構而使親水性上升,GMA-IDA被水膨潤的現象也越顯著,此時poly(GMA-IDA)分子鏈和分子鏈間彼此距離較遠,原本未能進入poly(GMA-IDA)內部螯合的銀離子可因濃度差再擴散進去內部螯和,使表面單位體積內螯合的銀離子數量變少,此時再受紫外光還原的銀奈米粒子就不易因還原的粒子密度過度集中而凝聚成較大顆粒;再來,將還原條件改於不同pH值的甲醛水溶液中還原(化學還原法),結果發現,當pH值大於5時,銀奈米粒子的粒徑仍會隨著液中pH值的上升而增加,但當pH值小至2時,甲醛水溶液的還原能力也隨之減弱,且此弱還原能力對銀奈米粒子成長的影響大於poly(GMA-IDA)分子鏈收縮的效應,反而可以得到較小粒徑的銀奈米粒子,其表面平均粒徑約為12.9nm。

      A novel method for the preparation of poly(propylene-graft-2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester)-silver fibers (PPG-IAgFs) by plasma-induced graft polymerization is presented in this study. GMA-IDA chelating groups within the PPG-I fibers were the coordination sites for chelating Ag+, at which nano-sized Ag nanoparticles were grown by UV light of wavelength 366 nm and formaldehyde solution. The characteristics of PPG-I fibers with different plasma treating times are monitored by using fourier transform infrared (FT-IR) spectroscope in this study. Scanning electronic microscopy (SEM) and elemental analysis show that the grafting percentage of GMA-IDA is maximum as the plasma treating time is 3 min. Moreover, SEM and TEM microscopes reveal that with an increasing pH values in aqueous solutions, the size of Ag nanoparticles decreased from 126.6 nm to 16.5 nm under the reduction of UV light 366nm for 30 min at 25℃. However, the size of Ag nanoparticles is smallest at pH=2 by the reduction of formaldehyde solution. Additionally, TEM observations demonstrate that the Ag nanoparticles distributed more deeply as the pH value of formaldehyde solution increase which manifesting that the distance of GMA-IDA polymer chains also enlarged with the increasing pH value.

    目 錄 中文摘要 I 英文摘要 III 誌謝 V 目 錄 VI 表目錄 VII 圖目錄 VIII Scheme X 第一章 緒 論 1 第二章 文獻回顧 3 2-1 銀奈米粒子的製備 3 2-2 化學還原法的簡介 6 2-2-1保護劑之影響 6 2-2-2成核原理 7 2-3 機能性纖維 13 2-3-1化學改質 14 2-3-2電漿改質 15 2-3-3改質方法比較 16 2-4 螯合型高分子 17 2-5 配位場理論 18 2-6 奈米材料的特殊性質 23 第三章 實驗內容 27 3-1 藥品 27 3-2 儀器 28 3-3 實驗流程 30 3-4 實驗步驟 31 3-4-1電漿改質 31 3-4-2製備銀奈米微粒 32 3-5 膨潤度測試 34 3-6 GMA-IDA之製備 34 3-7 分析方法 34 第四章 結果與討論 37 4-1 紅外線光譜 38 4-2 元素分析 38 4-3 PP fiber接枝GMA-IDA之SEM圖 39 4-4 AN共聚合 40 4-5 GMA-IDA高分子對銀離子平均配位數的計算 40 4-6 PPG-IAg+纖維等溫吸附和吸附動力試驗 42 4-7 XRD的鑑定 43 4-8 成長銀奈米粒子 43 4-8-1紫外光波長366nm還原45 4-8-2甲醛水溶液還原 46 第五章 結 論 54 參考文獻 76

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