聚苯胺/氧化鐵粉體/聚氨基甲酸酯 導電複合薄膜電氣與機械性質之研究

A Study on the Electrical and Mechanical Properties of Polyaniline/ Ferrite Powder/Polyurethane Composite Films

顏文彬(Wan-Bin Yen)

指導教授 ： 鄭國彬 ； 鄧道興

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2008年)

摘要

本質型導電高分子聚苯胺具合成簡單、製備容易，存在於環境下穩定性高，並可藉由質子化酸摻雜效應增加PANI導電度，因此聚苯胺是一適當且理想的導電性高分子材料，並廣泛地應用在防腐蝕、電變色顯示器、光電池等領域中。
本研究第一部份將苯胺單體利用氧化劑APS氧化聚合，並以DBSA、HCl PTSA、CSA四種不同質子酸摻雜，探討經不同質子酸摻雜後，溶解度與導電度的高低，並利用二次摻雜的方式來提升其粉體的導電度與其結構狀態，並取導電度較高PANI；第二部份為金屬氧化鐵，在酸性條件下進行粉體的表面改質與分散。
由於共軛高分子在成型上之困難，本實驗利用乾式聚氨基甲酸酯(DPU)易加工的特性與所合成出之PANI與金屬氧化鐵進行摻混，在不同PANI與氧化鐵摻雜匹配下，形成導電複合薄膜，並做相關電氣與機械性質之測試。
UV/Vis分析PANI摻雜酸之結果，與FT-IR鑑定所聚合之PANI與氧化鐵之化學結構；結合X-RD檢測下觀察其PANI是否為結晶態，利用GPC檢測自行合成PANI所聚合的分子量大小。用TGA探討在其成膜後的熱裂解溫度及殘餘量之關係，用SEM觀察PANI與氧化鐵與聚氨基甲酸酯摻混狀況；可藉由UV/Vis得知共聚物摻雜效應及其性質。最後再測量其表面電阻係數及共摻雜後之導電度及其應用範圍，探討於摻雜PANI與氧化鐵後，對導電複合膜拉伸性質之影響。最後並探討抗電磁波屏蔽效益(EMSE)及機械性質其研究。
其EMSE效果最佳著為P40F5四層厚度與P40F10三層厚度分別在200MHz(0.92μm)EMSE為6.765dB與手機頻率1900MHz(690μm)EMSE為7.331dB；在超高頻區為P40F10之EMSE效果最佳，為三層厚度(690μm) EMSE為40.563 dB。

關鍵字

導電性高分子 ； 聚苯胺 ； 摻雜 ； 氧化鐵 ； 聚氨基甲酸酯 ； 導電薄膜

並列摘要

Polyaniline (PANI), one of the intrinsic conducting polymers, possesses good processibility and excellent environmental stability. Its conductivity could be controlled by adjusting the content of protonatic acid. Now this conducting polymer PANI has been widely used in many fields.
In this study, firstly, we synthesized polyaniline (PANI) by using ammonium peroxydisulfate (APS) as the oxidant. Afterwards four kinds of the proton acid as DBSA, HCl, PTSA, CSA were doped respectively and both conductivity and solubility of individual samples were investigated. It was found that the CSA was the one with better results. So it was taken up for further processing to adjust its structure and conductivity. Also, the ferrite powders were blended then to improve the surface characteristics and dispersibility. The various weight percentages of either PANI or ferrite powders were taken to blend with DPU to form conducting composite films.
UV/Vis was applied to study the results of doping. Also, the FT-IR and X-RD were employed to investigate its chemical structures. The GPC was used to measure the molecular weight of PANI. The thermal degradation behavior of PANI/DPU, Fe3O4/DPU and PANI/Fe3O4/DPU composite films were examined by the TGA analysis. The surface morphology of PANI powders and Composite Films were observed by SEM.
The surface resistance coefficient, Electromagnetic Shielding Effectiveness (EMSE) and other electrical properties were probed. Besides, the mechanical properties were studied to show its unique characteristics.

並列關鍵字

Conducting Polymer ； Polyailine ； Dopped ； Ferrite Powder ； Polyurethane ； Conducting Film ； Conjugate Polymer ； Electromagnetic Shielding Effectiveness

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