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研究生(外文):Hsiu-Ping Shen
論文名稱(外文):Monodisperse Core-shell Type Polystyrene/Silver Particles via Dispersion Polymerization and Modified Electroless Plating: Synthesis and Characterization
指導教授(外文):Wen-Yen Chiu
口試委員(外文):Jiang-Jen LinChorng-Shyan ChernChia-Fen Lee
外文關鍵詞:Dispersion polymerizationElectroless platingCore-shell type particleConductive fillerOrganic-inorganic hybrid
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In this study, preparation of monodispersed silver-coated polystyrene core-shell type particles (Ag-PS) has been derived from a modified electroless silver plating process. The zeta potential, morphology and conductivity of the Ag-PS composite particles were investigated to study the influence of stabilizer, silver content and other experimental parameters.
This study included two parts. In the first part, polyethyleneimine (PEI) and polypyrrolidone (PVP) were served as stabilizers for producing monodispersed polystyrene latexes by dispersion polymerization. Then, the glass transition temperature (Tg), particle size, zeta potential and morphology were characterized by differential scanning calorimeter (DSC), dynamic light scattering analyzer (DLS), zeta potential analyzer, and scanning electron microscope (SEM), respectively. It was found that the Tg of polystyrene latexes was approximate to the pure polystyrene. In addition, the particle size was approximate to 3μm and monodispersed.
In the second part, a series of pretreatments of the PS surface was applied to modify the surface properties such as roughness, contact area and hydrophilic character. Then, silver nuclei produced on polystyrene particles served as nucleation sites for the growth of silver shell. The zeta potential, silver content, density, conductivity, particle size and morphology were characterized by zeta potential analyzer, thermogravimetric analyzer (TGA), pycnometer, four point probe and scanning electron microscope (SEM), respectively. X-ray diffractometer and energy-dispersive X-ray spectroscopy were employed to detect the crystallinity of silver and elements of composite particle. The results showed that a dense, stable and uniform silver shell was formed on the surface of PS particles. The bulk conductivity of the Ag-PS composites could achieve 2427 S/cm with only 36 wt.% silver content. According to the results, the Ag-PS composite particles with diameters of 3μm have great potential to be used as fillers in anisotropic conductive films.

致謝 I
摘要 III
Abstract IV
目錄 VI
表目錄 VIII
圖目錄 IX
第一章 緒論 1
第二章 文獻回顧 2
2-1 分散聚合法 2
2-1-1 顆粒穩定機制 4
2-1-2 顆粒大小控制 8
2-2 無電電鍍法 11
2-2-1 無電電鍍的前處理 12
2-2-2 鍍液的成分 13
2-2-3 無電電鍍的反應機制 16
2-3 金屬包覆之核殼型複合顆粒 20
2-3-1 合成方法 20
2-3-2 應用 24
第三章 實驗方法 29
3-1 實驗藥品 29
3-2 實驗儀器 33
3-3 實驗步驟 36
3-3-1 實驗流程圖 36
3-3-2 高分子乳膠顆粒合成 40
3-3-3 以無電電鍍法製備銀/高分子複合顆粒 42
第四章 結果與討論 47
4-1 高分子乳膠顆粒 47
4-1-1 轉化率測定 47
4-1-2 高分子粒徑觀察 47
4-1-3 高分子乳膠顆粒之界面電位分析 50
4-1-4 高分子乳膠顆粒之玻璃轉移溫度 51
4-2 以無電電鍍法製備銀/高分子複合顆粒 52
4-2-1 粗化、敏化、活化與還原 54
4-2-2 高分子乳膠顆粒界面性質探討 66
4-2-3銀含量之影響 68
4-2-4 XRD與EDX鑑定分析 76
4-2-5導電度之分析 79
第五章 結論 87
參考文獻 89

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