含銀之導電絹雲母之製備與性質研究

Preparation and Characterization of Nano-silver Doped Sericite.

陳怡錦(Yi-Chin Chen)

指導教授 ： 蔡宗燕

中原大學/理學院/化學系/碩士(2007年)

https://doi.org/10.6840/cycu200700677

摘要

中文摘要
本研究以天然絹雲母礦(sericite)為基材，因絹雲母為台灣本土的礦物，其視徑比(Aspect ratio)相當大，陽離子交換當量也較高，當視徑比大於陽離子交換當量，表示單位面積內可反應的活性基也較多，故我們必須先將絹雲母純化，將銀離子插層進入絹雲母層間，再還原成銀原子後，與高分子基材混成製得有機/無機混成複合材料，並探討其導電性、抗菌性、熱性質等。
藉由純化的絹雲母進行離子置換及銀鏡反應（無電解電鍍法或化學還原法），將原本不具導電性的絹雲母(sericite)導入銀離子，使其與絹雲母層間的陽離子進行離子置換，再經由Glucose或NaBH4等還原劑進行還原反應，使得銀離子還原成銀原子，且銀原子插層進入絹雲母層間成為導電絹雲母。本研究再將導電絹雲母添加改質劑(Lonzaine CS)，以作為導電絹雲母與環氧樹脂的相容劑，形成具有導電性的絹雲母/環氧樹脂奈米複合材料。
本研究使用廣角X光粉末繞射儀（XRD）、熱重分析儀（TGA）、元素組成分析、掃描式電子顯微鏡（SEM）、雷射粒徑分析儀、四點探針導電度計、穿透式電子顯微鏡（TEM）與動態機械分析儀（DMA）等儀器設備，進行結構鑑定並檢測其導電性與熱性質。
由實驗結果可知；含導電絹雲母及其環氧樹脂奈米複合材料，未來能應用於表面塗裝或封裝材料，抗靜電及防電磁波等方面之添加材料。在抗菌方面，含銀的導電絹雲母有顯著的抗菌效果，未來可朝抗菌劑的最佳添加濃度及長效性努力，可應用於抗菌製品的市場上。

關鍵字

離子置換法 ； 抗菌 ； 銀鏡反應 ； 絹雲母

並列摘要

ABSTRACT
In this study, we applied the natural sericite as the basic material. Because the sericite is native to Taiwan, and it has large aspect ratio and high cation exchange capacity. When aspect ratio is bigger than the cation exchange equivalent capacity, it indicates that the active groups per unit area are more. Therefore we the first purified and modified the sericite, then the silver ions were reduced to silver atom, and inserted into the interlayer of the basic material, as the organic/inorganic nanocomposites. We also discuss its conductive, antibacterial, and the thermal properties etc.
Because of the modification of purified sericite is carried out by the silver mirror reaction (Electroless Plating or Chemical reduction method) and ion-exchange method, the silver ion is intercalated into the interlayer of the sericite which is inconductible with the cation exchange ions, then followed by the reduction reaction by applying the redcuing agents like glucose or NaBH4 etc, which cause the reduction of silver ion to silver atom. This made the sericite become conductive. We also added the modifier like Lonzaine CS, as the compatibilizers between sericite and the epoxy resin, it makes sericite - epoxy resin with remarkable conductive nanocomposites.
In this work, there are some instruments are applied for the structure identification and thermal property measurement, such as XRD, TGA, ICP-AES, SEM, TEM and DMA.
Experimental results show that the sericite - epoxy resin nanocomposites can be applied in the special painting, the seal material, anti-static electricity and against electromagnetic wave and so on in the future. In the antibacterial application, the conductive sericite provides the remarkable antibacterial effect, which can be used in the antibacterial product market in the future.

並列關鍵字

Sericite ； The silver mirror reaction ； Antibacterial ； Ion-exchange method

參考文獻

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