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- Title
Rhodamine 6G Intercalated Montmorillonite Nanopigments-Polyethylene Composites: Facile Synthesis and UltravioletStability Study.
- Authors
Smitha, Venu Sreekala; Manjumol, Kochupurayil Appukuttannair; Ghosh, Swapankumar; Brahmakumar, Mathalayil; Pavithran, Chorappan; Perumal, Petchimuthu; Warrier, Krishna Gopakumar
- 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 NH4+-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 B15.8 Å 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*=553.45 and b*=59.62 from the color measurements.
- Subjects
MONTMORILLONITE; POLYETHYLENE; POLYMERS; COMPOSITE materials; X-ray diffraction; SPECTRUM analysis
- Publication
Journal of the American Ceramic Society, 2011, Vol 94, Issue 6, p1731
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2010.04326.x