Please use this identifier to cite or link to this item: http://ir.niist.res.in:8080/jspui/handle/123456789/1016
Title: Rhodamine 6G Intercalated montmorillonite nanopigments-polyethylene composites: Facile synthesis and ultravioletstability study
Authors: Smitha, V S
Manjumol, K A
Ghosh, S K
Brahmakumar, M
Pavithran, C
Perumal, P
Warrier, K G K
Keywords: Luminescence
Photodegradation
Polymerization
Nanocomposites
Cation-exchange
Issue Date: 2011
Publisher: Wiley
Citation: Journal of the American Ceramic Society 94(6):1731-1736;Jun 2011
Abstract: Bright red pigments, based on montmorillonite (MM) intercalated with rhodamine 6G (R6G) have been developed for the purpose of pigmenting polyethylene-based polymers. The cationic dye R6G was intercalated into NH(4)+-saturated MM in a slightly acidic medium. The resultant inorganic-organic MM complex was characterized using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared (FTIR) spectra, diffused reflectance, and color measurements. Expansion in basal spacing from an initial 11.3 to similar to 15.8 A was detected in the X-ray profile, confirming clay intercalation with R6G. The average particle size of the intercalated clay was 35 nm as measured by photon scattering. Frequency shifts of the C-H bending vibration from 724 to 744 cm-1 and that of the carbonyl (> C=O) stretching vibration from 1647 to 1666 cm-1 have been observed as a result of intercalation in FTIR spectra. Improvement in thermal stability for the intercalated MM was indicated by results from thermal analysis. The intercalated colored polyethylene-pigment showed enhanced stability under exposure to ultraviolet radiation of wavelength of 200-400 nm. The values for color coordinates were a*=53.45 and b*=9.62 from the color measurements.
URI: http://ir.niist.res.in:8080/jspui/handle/123456789/1016
ISSN: 0002-7820
Appears in Collections:2011

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