Preparation and characterization of “green” hybrid clay-dye nanopigments

Kaya, Mehmet; Onganer, Yavuz; Tabak, Ahmet Fatih

doi:10.1016/j.jpcs.2014.10.016

Cited by 14 publications

(6 citation statements)

References 34 publications

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“…Among them montmorillonite (MMT), a group of 2:1-layer clay minerals, is highly reactive and has been known since the 1940s to interact with organic molecules through electrostatic interactions (e.g., ion exchange), secondary bonding (e. g., adsorption of neutral species) or covalent bonding (e.g., grafting) to produce compounds that have found uses in a various industrial applications [2]. Montmorillonite which belongs to this group of layered silicates consists of thin plates of less than 1 nm in thickness.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Synthesis, characterization and assessment thermal properties of clay based nanopigments

Edraki

Kievani

2015

Front. Chem. Sci. Eng.

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Nano-clay based pigments (NCP) are new type of pigments composed of organic dyes and layered silicateclay 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, thermogravimetric analysis and differential thermograms suggested the thermal stability of the intercalated dye was improved.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Synthesis, characterization and assessment thermal properties of clay based nanopigments

Edraki

Kievani

2015

Front. Chem. Sci. Eng.

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“…Azobenzene dyes as well as spiropyran derivatives, even designed in dendritic intercalated structures, account mostly to photochromic behavior for the development of second-order NLO materials. Also the easy preparation of nanopigments has been recently reported by intercalating dyes in the modified and unmodified clays [ 13 , 14 ].…”

Section: Cationic Clay Thermoplastic Polymer Sensorsmentioning

confidence: 99%

Nanocomposites Based on Thermoplastic Polymers and Functional Nanofiller for Sensor Applications

et al. 2015

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Thermoplastic polymers like polyolefins, polyesters, polyamide, and styrene polymers are the most representative commodity plastics thanks to their cost-efficient manufacturing processes, excellent thermomechanical properties and their good environmental compatibility, including easy recycling. In the last few decades much effort has been devoted worldwide to extend the applications of such materials by conferring on them new properties through mixing and blending with different additives. In this latter context, nanocomposites have recently offered new exciting possibilities. This review discusses the successful use of nanostructured dispersed substrates in designing new stimuli-responsive nanocomposites; in particular, it provides an updated description of the synthetic routes to prepare nanostructured systems having the typical properties of thermoplastic polymers (continuous matrix), but showing enhanced optical, conductive, and thermal features dependent on the dispersion topology. The controlled nanodispersion of functional labeled clays, noble metal nanoparticles and carbon nanotubes is here evidenced to play a key role in producing hybrid thermoplastic materials that have been used in the design of devices, such as NLO devices, chemiresistors, temperature and deformation sensors.

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“…The reaction is free from external loads such as heat, light, and catalysts, and the exchange reaction occurs promptly. Additionally, precursors (clay, dye, and water) are all available, nontoxic, and cost-effective. − DCNPs benefit from the combined functional properties of the precursor materials and are environmentally beneficial. These colorants inherit the excellent color strength and brightness of cationic chromophores as well as high surface area, good dispersibility, excellent thermal stability, outstanding barrier, and corrosion resistance of nanoclay at the same time. − Hence, it could conceivably be hypothesized that DCNPs are a potential candidate to replace conventional hazardous yellow pigments in pavement marking paints.…”

Section: Introductionmentioning

confidence: 99%

A Yellow Lead-Free Pavement Marking Paint Based on Hybrid Dye-Clay Nanopigment: Morphological, Thermomechanical, and Photophysical Properties

Mahmoodi

Dadras

Jiryaei

et al. 2021

ACS Sustainable Chem. Eng.

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This study utilized a yellow hybrid dye-clay nanopigment (DCNP) in a paint formulation to prepare a lead-free, eco-friendly pavement marking paint as an alternative to the conventional lead chromate (PbCrO4) paints. Two paint formulations based on DCNP and PbCrO4 were fabricated using a mechanical mixing method followed by sonication. The paint films were obtained via solution casting. The morphological property investigation demonstrated that the DCNP was well dispersed in the polymeric paint film with the formation of a partially intercalated/exfoliated structure. The film colored with DCNP showed a 75% improvement in storage modulus (E′), much higher than that of the film filled with PbCrO4 (39%). DCNP increased the glass transition temperature (T g) of the paint by 5 °C, implying a favorable impact of this pigment on the pavement marking’s thermomechanical stability. The photophysical characterization revealed that the brilliant yellow color of the paint featured the yellow component value (+b*) of 69.9 units. Furthermore, the pavement marking standard colors were achieved with a considerably smaller amount of colorant when using DCNP due to its exceptional color strength. In conclusion, the remarkable functional properties of the nanopigment DCNP indicate its great potential as a promising alternative to lead chromate in pavement markings.

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Preparation and characterization of “green” hybrid clay-dye nanopigments

Cited by 14 publications

References 34 publications

RETRACTED ARTICLE: Synthesis, characterization and assessment thermal properties of clay based nanopigments

RETRACTED ARTICLE: Synthesis, characterization and assessment thermal properties of clay based nanopigments

Nanocomposites Based on Thermoplastic Polymers and Functional Nanofiller for Sensor Applications

A Yellow Lead-Free Pavement Marking Paint Based on Hybrid Dye-Clay Nanopigment: Morphological, Thermomechanical, and Photophysical Properties

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