改質CMK-3 /聚苯胺/聚苯乙烯磺酸複合材料之熱電性質研究

Abstract

本實驗分為兩部分，(1) 探討在不同溫下以不同濃度之對苯二胺 (p-phenylenediame) 對CMK-3進行改質，並分析其中的差異；(2) 利用原位聚合的方式製備CMK-3/聚苯胺/聚苯乙烯磺酸複合材料，再探討改質CMK-3和未改質CMK-3之間的熱電性質差異。

第一部分使用對苯二胺來對CMK-3進行改質，透過對苯二胺上氮原子的孤對電子與CMK-3上之羰機進行親核反應，FTIR光譜中可以發現在1515 cm 1處均出現R–CO–NH2¬的吸收峰，經過改質過後有效提升在二甲基乙醯胺 (N,N-Dimethylacetamide)中的分散性；並透過UV-vis光譜以及Raman光譜的分析顯示出在室溫下的條件下進行改質的效果較好。

第二部分利用原位聚合的方式製備聚苯乙烯磺酸/聚苯胺/ CMK-3複合材料，透過四點探針分析發現摻雜經過改質之CMK-3與未改質 之CMK-3比較各組樣品最高的導電率約提升了一個數量級，而改質與否並不影響導熱係數，在計算熱電優值 (ZT value) 後，以0.3M PD-30進行改質的CMK-3在摻雜7%固含量下，其熱電優值達到約0.13左右。

This study was divided into two parts: (1) Study the use of different concentration p-phenylenediamine to modify CMK-3 at different temperatures, and to analyze the difference between the before and after modification. (2) Discuss the difference of thermoelectric properties between doping modified- CMK-3 and unmodified- CMK-3 of poly(4-styrenesulfonate acid)/polyaniline/CMK-3 composite by in-situ polymerization.

The first part, nucleophilic substitution has attacked the carbonyl groups on CMK-3 and generating covalent bonds by using the lone-pair electrons which belongs to nitrogen atom of the p-phenylenediamine. With FTIR analysis, a peak of amide group appeared at 1515 cm 1 wavenumber. The dispersion of modified- CMK-3 in the N,N-Dimethylacetamide got better and better. With UV-Vis analysis and Raman analysis, we found better modify result at room temperature. The second part, we found an order enhancement of conductivity of poly(4-styrenesulfonate acid)/polyaniline/CMK-3 composite doping with modified-CMK-3 by in-situ polymerization. The thermal conductivity of poly(4-styrenesulfonate acid)/polyaniline/CMK-3 composite was not influenced by doping modified-CMK-3. The composite sample 0.3M PD-80-7% exhibit higher ZT value of 0.13.