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Water‐dispersible nanocomposites of polyaniline and montmorillonite
Author(s) -
Biswas Mukul,
Ray Suprakas Sinha
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000923)77:13<2948::aid-app18>3.0.co;2-f
Subject(s) - montmorillonite , polyaniline , nanocomposite , micrography , materials science , composite number , fourier transform infrared spectroscopy , polymerization , composite material , chemical engineering , intercalation (chemistry) , aqueous solution , polymer chemistry , scanning electron microscope , polymer , chemistry , organic chemistry , engineering
The polymerization of aniline (ANI) in aqueous medium in the presence of (NH 4 ) 2 S 2 O 8 and montmorillonite (MMT) resulted in the formation of a nanocomposite (PANI–MMT). The inclusion of PANI in the composite was confirmed by FTIR studies. The extent of PANI loading in the composite increased with ANI concentration at a fixed oxidant/MMT amount and with the oxidant amount at a fixed ANI and MMT weight, but decreased with an MMT amount at a fixed ANI and oxidant level. TGA revealed a higher stability for the PANI–MMT composite relative to PANI and confirmed a PANI loading of ca. 51% in the composite. The conductivity increased in all the cases. XRD analysis revealed no expansion of the d 001 spacing at 9.8 Å, implying no intercalation of PANI within the MMT layers. Scanning electron micrography studies revealed interesting morphological features for the composites. Transmission electron micrography analysis revealed distinctive features and confirmed the formation of PANI–MMT composite particles of diameters in the 300‐ to 400‐nm range. These composites could be obtained as stable colloids in the presence of poly ( N ‐vinyl pyrrolidone) under selective conditions. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2948–2956, 2000