Synthesis, characterization and assessment thermal properties of clay based nanopigments

Abstract

Nano-clay based pigments (NCP) are new type of pigments composed of organic dyes and layered silicate-clay nano-particles, and have already been used in polymeric coatings to improve mechanical thermal and stability properties. In this paper, the basic blue 41(BB41) was intercalated into Na⁺- montmorillonite in an aqueous medium. The dye-intercalated montmorillonite was centrifuged, dried, and milled to prepare the nanopigment particles. X-ray diffraction showed an increase in the basal spacing, thus confirming intercalation of the BB41 molecules within the nanostructures of the interlayer spaces. Fourier transform infrared spectroscopy was used for identifying the functional groups and chemical bounding of Na⁺-montmorillonite, BB41 and montmorillonite-BB41. The morphology of NCP was also studied by transmission electron microscopy. Finally, thermo-gravimetric analysis and differential thermograms suggested the thermal stability of the intercalated dye was improved.

Key words： nanopigment; layered silicate; cationic dye; thermal properties

References

1 Edraki M, Banimahd Keivani M. Study on the optical and Rheological properties of polymer-layered silicate nanocomposities. Journal of Physical and Theoretical Chemistry. Islamic Azad University of Iran, 2013, 10(1): 69–79(IAU)

2 Kaya M, Onganer Y, Tabak A. Preparation and characterization of “green” hybrid clay-dye nanopigments. Journal of Physics and Chemistry of Solids, 2015, 78: 95–100

3 Tahmassebi N, Bonyab A. Studying the corrosion resistance of an epoxy clay nanocoating using salt spray test and electrochemical impedance spectroscopy. Journal of Advanced Materials and Novel Coatings, 2012, 2: 3–12

4 Zaarei D, Sharif F. Structure, properties and corrosion resistivity of polymeric nanocomposite coatings based on layered silicates. Journal of Coatings Technology and Research, 2008, 5: 241–249

5 Bujdak J, Martínez V. Spectral properties of rhodamine 3B adsorbed on the surface of montmorillonites with variable layer charge. Langmuir, 2007, 23(4): 1851–1859

6 Capkova P, Mal P. Effect of surface and interlayer structure on the fluorescence of rhodamine B-montmorillonite: Modeling and experiment. Journal of Colloid and Interface Science, 2004, 277(1): 128–137

7 Klika W H, Weissmannová H, Čapková P, Pospíšil M. The rhodamine B intercalation of montmorillonite. Journal of Colloid and Interface Science, 2004, 275(1): 243–250

8 Batenburg L F, Fischer H. PlanoColors®—a combination of organic dyes and layered silicates with nanometer dimensions. Journal of E-Polymers, 2001, no. T_001.

9 Pospisil M, Capkova P. Structure analysis of montmorillonite intercalated with rhodamine B: Modeling and experiment<?Pub Caret?>. Journal of Molecular Modeling, 2003, 9: 39–46

10 Wang C, Juang L C, Hsu T C, Lee C K, Lee J F, Huang F C. Adsorption of basic dyes onto montmorillonite. Journal of Colloid and Interface Science, 2004, 273(1): 80–86

11 Raha S, Ivanov I, Quazi N H, Bhattacharya S N. Photo-stability of rhodamine-B/montmorillonite nanopigments in polypropylene matrix. Applied Clay Science, 2009, 42: 661–666

12 Marchante Rodriguez V. Linear low-density polyethylene colored with a nanoclay-based pigment: Morphology and mechanical, thermal, and colorimetric properties. Journal of Applied Polymer Science, 2013, 129(5): 2716–2726

13 Smitha V S, Ghosh S. Rhodamine 6G intercalated montmorillonite nanopigments—polyethylene composites: Facile synthesis and ultraviolet stability study. Journal of the American Ceramic Society, 2011, 94(6): 1731–1736

14 Baez E, Quazi N, Ivanov I, Bhattacharya S N. Stability study of nanopigment dispersions. Journal of Advanced Powder Technology, 2009, 20(3): 267–272

15 Raha S, Ivanov I, Quazi N H, Bhattacharya S N. Dye/clay intercalated nanopigments using commercially available non-ionic dye. Journal of Dye and pigments, 2012, 93: 1515–1518

16 Validi M, Bazgir S. Intercalatin of methylene blue into montmorillonite at different conditions: An approach for preparing clay-based nanopigments. Ceramics-Silikáty, 2012, 56(2): 152–158

17 Belteran M I, Marchante V. Characterisation of montmorillonites simultaneously modified with an organic dye and an ammonium salt at different dye/salt ratios. Properties of these modified montmorillonites EVA nanocomposites. Applied Clay Science, 2014, 98: 43–52