製備不同形態之二氧化矽/聚吡咯 核殼複合顆粒及其導電性探討

Preparation of different shapes of SiO2 / polypyrrole core-shell composite particles and investigate it’s conductive properties

李哲楷(Jhe-Kai Lee)

指導教授 ： 許克瀛

中原大學/工學院/化學工程研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500053

摘要

本研究以三乙氧基乙烯基矽烷為前驅物，利用溶膠凝膠法。在相同反應時間、溫度以及轉速下，藉由控制前驅物濃度以及催化劑（NH4OH，氨水）的比例，製備出不同粒徑含乙烯基的二氧化矽顆粒。並以此顆粒作為粒種。利用自由基反應法，合成出不同粒徑的啞鈴形及線形二氧化矽顆粒作為基材。再以一步驟之原位氧化還原聚合法製備出不同長度之二氧化矽／聚吡咯核殼顆粒。配合適當的吡咯重量百分比、反應時間、穩定劑濃度及界面改質劑濃度，獲得製備高產率線形二氧化矽／聚吡咯核殼顆粒的聚合條件，並探討顆粒之電導性質。
由實驗結果顯示製備出的顆粒藉由電子式原子力顯微鏡可以微觀的方式觀察，發現所製備之粒子具電導性，並經由電性分析的結果可得知所製備之二氧化矽／聚吡咯核殼顆粒可作為電池使用。

關鍵字

導電高分子 ； 三聚體 ； 二聚體 ； 自由基聚合 ； 溶膠凝膠法 ； 核殼顆粒

並列摘要

In this study, different size of Silica particles possessing vinyl groups were prepared by sol-gel method using Vinyltriethoxysilane as precursor at the same reation time、temperature and stirring speed. Because there are vinyl groups on silica particles, we can take these particles as seeds for polymerization. By using initiator to open vinyl groups and start the free radical polymerization, dumbbell and linear silica particles linked by C-C bond were formed.
The second step was to prepare SiO2／Polypyrrole core–shell particles. SiO2／Polypyrrole core–shell particles were prepared by a facile method through a redox reaction. By changing pyrrole wt％, reaction time, stabilizer concentration, and Surface modification agent concentration, the effect on particles morphology were investigated. System to prepare high yield linear SiO2/polypyrrole particles can be found. Electric conductivity property of these particles can be measured and tested.
The experimental results shows the particles which are prepared can use Conductive Atomic Force Microscopy（C-AFM）and observe the prepared particles with electrical conductivity and therefore can be used as a lithium battery use.

並列關鍵字

Free radical polymerization ； Conductive polymer ； Core-shell particles ； Dumbbell particles ； Sol-gel method

參考文獻

[1]. B. Zhao, Z. Nan, Formation of self-assembled nanofiber-like Ag@PPy core/shell structures induced by SDBS, Mater. Sci. Eng. C ,32 (2012) 1971–1975.

[2]. Z. Zhang, Z. Wei, and M.Wan, Nanostructures of Polyaniline Doped with Inorganic Acids, Macromolecules 35(2002)5937-5942.

[3]. Y.W .Ju , J.H.Park , H.R. Jung , W.J. Lee, Electrochemical properties of polypyrrole/sulfonted SEBS composite nanofibers prepared by electrospinning, Electrochim. Acta 52 (2007) 4841–4847.

[4]. Pe. Liu, X.Wang, H. Li, Preparation of carboxylated carbon nanotubes/polypyrrole composite hollow microspheres via chemical oxidative interfacial polymerization and their electrochemical performance, SYNTHETIC MET 181 (2013) 72-78.

[5]. J.Liua,Lei Zhang, F.Menga, Y.Chen, J.Liua, Y.Sun, T.Luo, M.Li , A novel ammonia sensor based on high density, small diameter polypyrrole nanowire arrays, Sensors and Actuators B 142 (2009) 204–209.