Lee Kwang-Pill, Gopalan Anantha Iyengar, Kim Kyu Soo, Santhosh Padmanabhan
Department of Chemistry Graduate School, Kyungpook National University, Daegu 702-701, South Korea.
J Nanosci Nanotechnol. 2007 Oct;7(10):3386-93. doi: 10.1166/jnn.2007.822.
Water soluble and processable nanocomposites composed of multi-walled carbon nanotubes (MWNTs) and poly(diphenylamine sulfonic acid) (PDPASA) are synthesized and characterized. Two types of methodologies are adopted. MWNTs are covalently functionalized with 2,5-diaminobenzene sulfonic acid (DABSA) and further in situ polymerized with diphenylamine-4-sulfonic acid (DPASA). This results in the formation of nanocomposites, MWNT(DABSA)-g-PDPASA, in which PDPASA is presented as the graft chains onto MWNTs. In another approach, DPASA is in situ polymerized in presence of unfunctionalized MWNTs, results in a nanocomposite in which MWNTs are present as entrapped mass in PDPASA matrix. Both nanocomposites are found to be water soluble and can form free standing films. The conductivity of MWNT(DABSA)-g-PDPASA and MWNT/PDPASA is found to be 1.25 mS x cm(-1) and 0.65 mS x cm(-1), respectively, which is higher than that of pristine PDPASA (0.25 x 10(-5) S x cm(-1)). The nanocomposites are characterized for their structure, morphology, optical and thermal properties.
合成并表征了由多壁碳纳米管（MWNTs）和聚（二苯胺磺酸）（PDPASA）组成的水溶性且可加工的纳米复合材料。采用了两种方法。MWNTs用2,5 - 二氨基苯磺酸（DABSA）进行共价功能化，并进一步与二苯胺 - 4 - 磺酸（DPASA）原位聚合。这导致形成纳米复合材料MWNT(DABSA)-g-PDPASA，其中PDPASA以接枝链的形式存在于MWNTs上。在另一种方法中，DPASA在未功能化的MWNTs存在下原位聚合，得到一种纳米复合材料，其中MWNTs作为包裹在PDPASA基质中的物质存在。发现这两种纳米复合材料都是水溶性的，并且可以形成独立的薄膜。发现MWNT(DABSA)-g-PDPASA和MWNT/PDPASA的电导率分别为1.25 mS x cm(-1)和0.65 mS x cm(-1)，高于原始PDPASA的电导率（0.25 x 10(-5) S x cm(-1)）。对纳米复合材料的结构、形态、光学和热性能进行了表征。
