Journal ArticleDOI
Rhodamine 6G Intercalated Montmorillonite Nanopigments–Polyethylene Composites: Facile Synthesis and UltravioletStability Study
Venu Sreekala Smitha,Kochupurayil Appukuttannair Manjumol,Swapankumar Ghosh,Mathalayil Brahmakumar,C. Pavithran,Petchimuthu Perumal,Krishna Gopakumar Warrier +6 more
TLDR
In this paper, bright red pigments based on montmorillonite (MM) intercalated with rhodamine 6G (R6G) have been developed for the purpose of pigmenting polyethylene-based polymers.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 ∼ 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.read more
Citations
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A hybrid dye-clay nano-pigment: Synthesis, characterization and application in organic coatings
TL;DR: In this article, a hybrid dye-clay nano-pigment (DCNP) was synthesized through cationic exchange reaction of methylene blue and Cloisite 15A and its application in an epoxy coating.
Journal ArticleDOI
The Improved Stability of Molecular Guests by the Confinement into Nanospaces
TL;DR: The stabilities of organic dyes have been controlled by host-guest complexation and the hybrids have been regarded as novel photofunctional materials as discussed by the authors, and the dyes encapsulated i...
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Role of a hybrid dye-clay nano-pigment (DCNP) on corrosion resistance of epoxy coatings
Ali Mahmoodi,Morteza Ebrahimi +1 more
TL;DR: In this paper, the authors combined the desirable color characteristics of cationic dyes and the good barrier properties of organoclays by synthesizing hybrid dye-clay nano-pigments (DCNPs) via cationicity exchange of two cationics dyes (i.e. basic blue 9 and basic yellow 87) and different commercial organocays (Cloisite 15A, 20A and 30B) and their corrosion resistance behaviors were investigated by using electrochemical impedance spectroscopy and salt spray test.
Journal ArticleDOI
Poly(styrene)-graft-/rhodamine 6G–fluoromica hybrids: synthesis, characterization and photophysical properties
Giuseppe Leone,Umberto Giovanella,Fabio Bertini,William Porzio,Francesco Meinardi,Chiara Botta,Giovanni Ricci +6 more
TL;DR: In this paper, a luminescent poly(styrene) (PS)-graft-/rhodamine 6G (R6G) dye-fluoromica clay hybrid was synthesized and characterized by XRD, FTIR, TGA, DSC, SEC, UV-Vis, and continuous wave and time-resolved photoluminescence (PL) spectroscopies.
Journal ArticleDOI
Luminescent Carrier, Tb3+-Doped Layered Yttrium Hydroxide, for Delivery Systems
TL;DR: This work explored Tb3+-doped layered yttrium hydroxide Y1.80Tb0.20(OH)5Cl· nH2O (LYH:Tb) nanosheets as a luminescent carrier for sustained release of salicylic acid (2-hydroxybenzoic acid), an example of nonsteroidal anti-inflammatory drugs and antimicrobial agents.
References
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Journal ArticleDOI
Nanocomposites: synthesis, structure, properties and new application opportunities
TL;DR: In this article, a unified overview of matrix nanocomposites is presented underlining the need for these materials, their processing methods and some recent results on structure, properties and potential applications, perspectives including need for such materials in future space mission and other interesting applications together with market and safety aspects.
Journal ArticleDOI
Studies on photodegradation of two commercial dyes in aqueous phase using different photocatalysts
TL;DR: The percentage reduction of MO and R6G was estimated under UV/solar system and it was found that COD reduction takes place at a faster rate under solar light as compared to UV light.
Journal ArticleDOI
Polymer/montmorillonite nanocomposites with improved thermal properties Part I. Factors influencing thermal stability and mechanisms of thermal stability improvement
TL;DR: In this article, a detailed examination of factors influencing thermal stability, including the role of chemical constitution of organic modifier, composition and structure of nanocomposites, and mechanisms of improvement of thermal stability in polymer/montmorillonite composites, is presented.
Journal ArticleDOI
Sorption of dyes from aqueous solutions onto fly ash.
TL;DR: It was shown that both basic (cationic) as well as acid (anionic) dyes can be sorbed onto the fly ash and the sorption of basic dyes increased at high pH values, whereas the opposite was true for acid dyes.
Journal ArticleDOI
Synthetic organo- and polymer- clays : preparation, characterization, and materials applications.
TL;DR: In this paper, a general technique for the hydrothermal synthesis of clay minerals in the presence of organic, organometallic, and polymeric intercalants is described, along with their characterization and materials applications.