Maser Wolfgang K, Jiménez Pablo, Payne Nicholas O, Shepherd Roderick L, Castell Pere, Panhuis Marc in het, Benito Ana M
Instituto de Carboquímica (CSIC), Department of Nanotechnology, C/Miguel Luesma Castán 4, E-50018 Zaragoza, Spain.
J Nanosci Nanotechnol. 2009 Oct;9(10):6157-63. doi: 10.1166/jnn.2009.1578.
Entirely nanostructured nanofibrilar-polyaniline/multi-walled carbon nanotube (NF-PANI/MWNT) composites with nanotube loadings as high as 50 wt% were synthesized via a facile in-situ chemical polymerization process. These are composed of a nanofibrilar polyaniline (NF-PANI) matrix in which multi-walled carbon nanotubes (MWNTs) are homogeneously embedded and partially covered by polyaniline. Stable and homogeneous aqueous dispersions in concentrations up to 10 mg/ml in water easily were prepared. For the first time, dispersions and casted films of this novel type of NF-PANI/MWNTs composites are characterized. Both, dispersions and films reveal the typical behavior of PANI with slightly changed redox values and with fast reaction kinetics due to the presence of MWNTs. Conductivity of drop cast films reveal values of 20 to 50 S/m. Local SPM measurements confirm the intrinsic fibril structure. Individual fibrils show both semiconducting and metallic behavior with values up to 100 S/m. This new class of nanostructured NF-PANI/MWNT composites with its water-based processing possibilities as well as with its conducting and electrochromic effects will contribute to further progress in the field of smart plastic electronics.
通过一种简便的原位化学聚合工艺合成了纳米管负载量高达50 wt%的全纳米结构纳米纤维状聚苯胺/多壁碳纳米管（NF-PANI/MWNT）复合材料。这些复合材料由纳米纤维状聚苯胺（NF-PANI）基质组成，多壁碳纳米管（MWNTs）均匀地嵌入其中，并部分被聚苯胺覆盖。很容易制备出浓度高达10 mg/ml的稳定且均匀的水分散体。首次对这种新型NF-PANI/MWNTs复合材料的分散体和浇铸膜进行了表征。分散体和薄膜都显示出聚苯胺的典型行为，由于MWNTs的存在，其氧化还原值略有变化，反应动力学较快。滴铸膜的电导率显示为20至50 S/m。局部扫描探针显微镜测量证实了其固有的纤维结构。单个纤维显示出半导体和金属行为，电导率高达100 S/m。这种新型的纳米结构NF-PANI/MWNT复合材料及其基于水的加工可能性以及其导电和电致变色效应将有助于智能塑料电子领域的进一步发展。
