Novel approach for the synthesis of hybrid clay-based nanopigments and their application as coloring agents

Mohan, Chandra; Varma, Rajender S.; Kumari, Neeraj

doi:10.1007/s10098-023-02468-5

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…In contrast, at pH 2, the color was green with different λmax values, 420 and 630 nm, due to the protonation of two of the nitrogen On interaction with CPC, the FTIR spectrum of OMt, OBent, and OVt showed a new pair of the vibrational bands at 2929 cm −1 , 2858 cm −1 in OMt, at 2925 cm −1 , 2858 cm −1 in OBent, and at 2917 cm −1 and 2851 cm −1 in OVt which has been assigned to the asymmetric and symmetric vibrations of methylene group of the CPC present on the surface of the OMt, OBent, and OVt. Furthermore, a substantial reduction in the intensity of H-O-H stretching vibration of interlayer water at 3410 cm −1 in Mt, at 1648 cm −1 , 1640 cm −1 in Mt, Bent further confirms the replacement of most of the interlayer water by CPC and thus ensures the presence of CPC on the surface as well as in the interlayer region, also supported by XRD data [22].…”

Section: Effect Of Ph On the Stability Of CV And Ic In Aqueous Mediasupporting

confidence: 63%

Synthesis of Nano Pigments Using Clay Minerals and Organic Dyes and Their Application as Colorants in Polymer Matrix

et al. 2023

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A new generation of clay-based nano pigments has been introduced, providing the advantage of both inorganic pigments and organic dyes. These nano pigments have been synthesized through a stepwise procedure where, initially, an organic dye is adsorbed onto the surface of the adsorbent, and then dye adsorbed adsorbent is used as pigment for further applications. The objective of the current paper was to examine the interaction of non-biodegradable toxic dyes, Crystal Violet (CV) and Indigo Carmine (IC), with clay minerals (montmorillonite (Mt), vermiculite (Vt), and clay bentonite (Bent)) and their organically modified forms (OMt, OBent, and OVt) and to develop a novel methodology for the synthesis of the value-added products and clay-based nano pigments without creating second generation waste materials. In our observation, the uptake of CV was more intense onto pristine Mt, Bent, and Vt, and the uptake of IC was more onto OMt, OBent, and OVt. CV was found to be in the interlayer region of Mt and Bent, as supported by XRD data. Zeta potential values confirmed the presence of CV on their surface. In contrast, in the case of Vt and organically modified forms, the dye was found on the surface, confirmed by XRD and zeta potential values. In the case of indigo carmine, the dye was found only on the surface of pristine Mt, Bent, Vt, and organo Mt, Bent, Vt. During the interaction of CV and IC with clay and organoclays, intense violet and blue-colored solid residues were obtained (also known as clay-based nano pigments). The nano pigments were used as colorants in a poly (methyl-methacrylate) (PMMA) polymer matrix to form transparent polymer films.

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Section: Effect Of Ph On the Stability Of CV And Ic In Aqueous Mediasupporting

confidence: 63%

Synthesis of Nano Pigments Using Clay Minerals and Organic Dyes and Their Application as Colorants in Polymer Matrix

et al. 2023

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An Investigative Study on the Structural, Thermal and Mechanical Properties of Clay-Based PVC Polymer Composite Films

2023

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The present study aims to explore the impact of pristine and surfactant-modified clays (montmorillonite, bentonite and vermiculite) on the thermomechanical properties of a poly (vinyl chloride) (PVC) polymer film. Initially, clay was modified by employing the ion exchange method. The modification of clay minerals was confirmed by the XRD pattern and thermogravimetric analysis. Pristine PVC polymer film and clay (montmorillonite, bentonite and vermiculite)-based PVC polymer composite films were fabricated using solution casting. The ideal dispersion of surfactant-modified organo-clays was observed in the PVC polymer matrix due to the hydrophobic nature of modified clays. The resultant pure polymer film and clay polymer composite film were characterized using XRD and TGA, and their mechanical properties were determined using a tensile strength tester and Durometer. From the XRD pattern, the intercalation of the PVC polymer film was found in the interlayer of organo-clay while exfoliation or partial intercalation and exfoliation were observed for pristine clay mineral-based PVC polymer composite films. Thermal analysis indicated a lowering of the decomposition temperature of the composite film as clay promotes the thermal degradation temperature of PVC. Improvement in the tensile strength and hardness was found to be more frequent in the case of organo-clay-based PVC polymer films, which is only due to the hydrophobic nature of organ clays, resulting in greater compatibility with the polymer matrix.

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Innovation in Waste Management

Kaushal,

Bansal

2024

Practice, Progress, and Proficiency in Sustainability

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Fashion industries are growing rapidly for ever changing trends and design, which has long lasting significant on footprints. From the textile production to garment manufacturing various disposal stages of fashion supply chains contribute to pollution and waste. The fashion industry is causing the most pollution, making it the second-largest polluting industry in the world. Industry should make sustainable fabrics and clothes to prevent the Earth from getting polluted. Designers need to create a substitute for fabric, dyes, and method of manufacturing to approach sustainability like substitute denim fabric to reduce the need for dyeing processes. Additionally, industry should produce sustainable leather to eliminate air pollution and loss of animals caused by the leather industry. Some companies are experimenting with making leather using coconuts, which is sustainable. This coconut leather can be recycled and breaks down underwater in just 150 days, unlike real leather, which takes 150 years to decompose, without harming the environment.

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Novel approach for the synthesis of hybrid clay-based nanopigments and their application as coloring agents

Cited by 3 publications

References 27 publications

Synthesis of Nano Pigments Using Clay Minerals and Organic Dyes and Their Application as Colorants in Polymer Matrix

Synthesis of Nano Pigments Using Clay Minerals and Organic Dyes and Their Application as Colorants in Polymer Matrix

An Investigative Study on the Structural, Thermal and Mechanical Properties of Clay-Based PVC Polymer Composite Films

Innovation in Waste Management

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