聚苯胺與團鍊共聚高分子電解質之複合材料研究

Directing the morphology of polyaniline via in situ polymerization assisted by block polyelectrolytes

謝依純(I-Chun Hsieh)

指導教授 ： 趙基揚

國立臺灣大學/工學院/材料科學與工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.02613

摘要

在這個研究中，我們利用陰離子聚合及後續的化學合成反應得到具高度磺酸化且分子量分布集中的團鍊共聚高分子電解質。此團鍊共聚高分子電解質在水溶液中會隨著濃度變化而形成不同自組裝的微結構，在苯胺進行聚合時可以當作模組(template)來導引聚苯胺複合物的微結構；同時高分子電解質鍊段的磺酸根也扮演摻雜(dopant)的角色，以使合成出的聚苯胺複合物有良好的導電度。聚苯胺複合物的製備是將苯胺單體在0℃下在團鍊共聚高分子電解質水溶液中進行乳化共聚合反應(in situ emulsion polymerization)。我們以團鍊共聚高分子電解質水溶液的濃度與反應時間為可變參數來研究影響聚苯胺與團鍊共聚高分子電解質的共聚物的微結構及導電度的因素，並探討這些複合物的成長機制。

關鍵字

團鍊共聚高分子電解質 ； 聚苯胺 ； 導電高分子 ； 自組裝微結構 ； 模組導引聚合反應 ； 陰離子聚合

並列摘要

In this study, we used anionic polymerization and sequential analogous chemistry to synthesize sulfonic acid containing block polyelectrolytes with high degree of sulfonation and narrow molecular weight distribution. When these block polyelectrolytes were dispersed in water, various self-assembled morphologies were observed as a function of the concentration of the aqueous solution and of the molecular weight of the block polyelectrolyte. The block polyelectrolytes played the role as the templates to direct the morphology of PAni/block polyelectrolyte composites and they were also served as dopants simultaneously to enhance the electric conductivity of the PAni/block polyelectrolyte composites. The PAni composites were prepared by adding the aniline monomers to the block polyelectrolyte aqueous solution to proceed in situ emulsion polymerization at 0℃. Parameters affecting the morphologies and the conductivity were found to be the concentrations of the block polyelectrolyte aqueous solution and the reaction time. The growth mechanism of the PAni/polyelectrolyte composites were also investigated.

並列關鍵字

block polyelectrolyte ； polyaniline（PAni） ； Conducting polymer ； self-assembly ； template guided polymerization ； anionic polymerization

參考文獻

1. Shirakawa, H., et al., Synthesis of Electrically Conducting Organic Polymers - Halogen Derivatives of Polyacetylene, (Ch)X. Journal of the Chemical Society-Chemical Communications, 1977(16): p. 578-580.

2. Terje A. Skotheim, R.L.E., John R. Reynolds, Handbook of conducting polymers ed. N.Y. M. Dekker. 1986.

3. Macdiarmid, A.G. and A.J. Heeger, Organic Metals and Semiconductors - the Chemistry of Polyacetylene, (Ch)X, and Its Derivatives. Synthetic Metals, 1980. 1(2): p. 101-118.

4. Zuo, F., et al., Solution Studies of the Emeraldine Oxidation-State of Polyaniline. Synthetic Metals, 1989. 29(1): p. E445-E450.

5. Macdiarmid, A.G., et al., Polyaniline - a New Concept in Conducting Polymers. Synthetic Metals, 1987. 18(1-3): p. 285-290.