Abstract
The present preliminary investigation reports, for the first time, the effects of typical cationic and anionic surfactants on the microwave-assisted solid-state intercalation and polymerization of carbazole (Cz) in the basal spacings of Bentonite. The intercalation of cetyl pyridinium chloride (CPCl), a cationic surfactant, and naphthalene sulfonic acid (NSA), an anionic surfactant, in Bentonite was carried out at two loadings—25 and 50 wt%—using microwave irradiation. The in situ polymerization of Cz was successfully carried out into the surfactant-modified galleries of Bentonite. This was confirmed by Gel permeation chromatography (GPC). The intercalation of poly(carbazole) (PCz) was confirmed by FT-IR, UV–Visible, and XRD analyses. Although polymerization was carried out in the solid-state, the UV–Visible spectra revealed the doped state of PCz and the presence of a charge carrier tail. The XRD studies showed that the increase in the height of the galleries was higher in case of Bentonite/CPCl/PCz nanocomposites as compared to Bentonite/NSA/PCz nanocomposites. It also revealed different orientations of the two surfactants in the galleries of the clay. The average particle size of Bentonite/CPCl/PCz (1:0.25:0.25) and (1:0.5:0.5) nanocomposites was found to be in the range of 25–35 and 50–60 nm, respectively. The Bentonite/NSA/PCz (1:0.25:0.25) and (1:0.5:0.5) nanocomposites showed the average particle size in the range of 20–30 nm and 40–50 nm, respectively. The results revealed that both cationic and anionic surfactants strongly influenced the morphology of Bentonite/PCz nanocomposites. The difference in the mechanisms of solid-state intercalation of PCz in the presence of these surfactants has been proposed.
References
Beall GW, Goss M (2004) Self-assembly of organic molecules on montmorillonite. Appl Clay Sci 27:179–186
Bergaya F, Lagaly G (2001) Surface modification of clay minerals. Appl Clay Sci 19:1–3
Biswas M, Ray SS (2000) A water dispersible nanocomposite from polyaniline and montmorillonite. J Appl Polym Sci 77:2948–2953
Choi HJ, Kim JW, Joo J, Kim BH (2001) Synthesis and electrorheology of emulsion intercalated PANI-clay nanocomposite. Synth Met 121:1325–1326
Gopalan AI, Lee KP, Hong MH, Santhosh P, Manesh KM, Kim SH (2006) Nanostructuring of poly(diphenylamine) inside the galleries of montmorillonite organo clay through self-assembly approach. J Nanosci Nanotechnol 6:594–1599
Kim BH, Jung JH, Kim JW, Choi HJ, Joo J (2001a) Physical characterization of polyaniline Na+ montmorillonite nanocomposite intercalated by emulsion polymerization. Synth Met 117:115–118
Kim BH, Jung JH, Kim JW, Choi HJ, Joo J (2001b) Effect of dopant and clay on nanocomposites of polyaniline (PANI) intercalated into Na+-montmorillonite (Na+-MMT). Synth Met 121:1311–1312
Mehrotra V, Giannelis EP (1991) Metal-insulator molecular multilayers of electro active polymers: intercalation of polyaniline in mica-type layered silicates. Solid State Commun 77:155–158
Nirukhe AB, Shertukde VV (2009) Preparation and characterization of poly(butylene terephthalate) nanocomposites with various organoclays. J Appl Polym Sci 113(1):585–592
Pavlidou S, Papaspyrides CD (2008) A review on polymer-layered silicate nanocomposites. Prog Polym Sci 33(12):1119–1198
Pospisil M, Capkova P, Weiss Z, Malac Z, Simonik J (2002) Intercalation of octadecylamine into montmorilonite; molecular simulations and XRD analysis. J Colloid Interface Sci 245:126–132
Sudha JD, Sivakala S (2009) Conducting polystyrene/polyaniline blend through template-assisted emulsion polymerization. Colloid Polym Sci 287(11):1347–1354
Wiesbrock F, Hoogenboom R, Schubert US (2004) Microwave-assisted polymer synthesis: state-of-the-art and future perspectives. Macromol Rapid Commun 25(20):1739–1764
Wu Q, Xue Z, Qi Z, Wang F (2000) Synthesis and characterization of PAN/clay nanocomposite with extended chain conformation of polyaniline. Polymer 41:2029–2032
Yoshimoto S, Ohashi F, Kameyama T (2004a) Simple preparation of sulfate anion-doped polyaniline-clay nanocomposites by an environmentally friendly mechanochemical synthesis route. Macromol Rapid Commun 25:1687–1691
Yoshimoto S, Ohashi F, Ohnishi Y, Nonami T (2004b) Synthesis of polyaniline–montmorillonite nanocomposites by the mechanochemical intercalation method. Synth Met 145:265–270
Yoshimoto S, Ohashi F, Kameyama T (2005) X-ray diffraction studies of intercalation compounds prepared from aniline salts and montmorillonite by a mechanochemical processing. Solid State Commun 136:251–256
Zhu J, Palchik O, Chen SG, Gedanken A (2000) Microwave assisted preparation of CdSe, PbSe, and Cu2-x Se nanoparticles. J Phys Chem 104:7344–7347
Acknowledgments
The corresponding author Dr. Ufana Riaz wishes to thank the Department of Science and Technology (DST), Science and Engineering Research Council (SERC), India for granting the Young Scientist fellowship under the “Fast Track Scheme for Young Scientists,” vide sanction no SR/FT/CS-012/2008. The authors also wish to acknowledge the TEM facility provided by the Sophisticated Analytical Instrumentation Facility (S.A.I.F) at the All India Institute of Medical Sciences (A.I.I.M.S), India.
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S. M. Ashraf—now retired.
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Riaz, U., Ashraf, S.M. & Khan, N. Effects of surfactants on microwave-assisted solid-state intercalation of poly(carbazole) in Bentonite. J Nanopart Res 13, 6321–6331 (2011). https://doi.org/10.1007/s11051-011-0611-9
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DOI: https://doi.org/10.1007/s11051-011-0611-9