聚苯胺的導電度對銀金屬還原之影響及其成長機制

The Influence of Conductivity of Polyaniline to the Growth Mechanism of Silver

張恒睿(Heng-Jui Chang)

指導教授 ： 廖文彬

國立臺灣大學/工學院/材料科學與工程學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.10808

摘要

聚苯胺具有氧化還原性質，我們將聚苯胺置於溶液中還原銀離子使其變成銀金屬。本論文的重點就是釐清導電度對於銀金屬成長的影響，了解銀金屬成長的過程。因為只有去摻雜聚苯胺可以溶於溶劑之中，藉此分離出些微摻雜與完全去摻雜的兩種聚苯胺，這兩種聚苯胺的導電度也不同。我們也藉由膨潤效應來做出不同導電度的聚苯胺。
同時也釐清共溶劑在還原銀離子過程中所扮演的角色，這包括了膨潤效應、幫助銀離子更容易到達聚苯胺表面、造成結晶嗜好面，而這三個作用的交互影響會改變最終銀金屬所形成的型態，我們也以不同共溶劑成分比例來分析共溶劑影響的程度。

針對不同聚導電度苯胺在共溶劑下還原銀離子的實驗隨時間進行觀察，發現銀金屬隨導電度上升型態變化為顆粒狀、片狀、小規模堆疊、大規模堆疊。藉此了解銀金屬成長過程並建立成長機制，用以解釋及預測其他聚苯胺還原銀離子系統的結果。

關鍵字

聚苯胺 ； 銀 ； 複合材料 ； 還原 ； 導電高分子

並列摘要

Polyaniline have redox properties. We put polyaniline into solution with silver ions. It can turn silver ions into silver. The focus of this thesis want to clarify the relationship between the conductivity of polyaniline and the morphology of silver. We want to know the growth mechanism of silver. Only dedopped polyaniline can dissolve in solvent. So, we can synthsize light-dopped polyanilin and dedopped polyaniline. We also use swelling effect to control the conductivity od polyaniline.

We want to know the effect of co-solvent during the process of reduction of silver ions. That includes swelling effect, the content of silver ions at polyaniline surface and preferred orientation effect. Those factors can affect the final morphology of silver. We control the ratio of co-solvent to analyze the degree of co-solvent effects.

Base on different conductivities of polyaniline. The morphology of silvers are from particles to sheets to short-range packing to long-range packing with conductivity increased. We try to know and build up a mechanism of silver growth. Finally, we use the mechanism to explain and predict other systems.

並列關鍵字

Polyaniline ； Silver ； Composite material ； Reduction ； Conducting polymer

參考文獻

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