Stabilization of a hydrophobic natural dye by intercalation into organo-montmorillonite

Kohno, Yoshiumi; Inagawa, Mayu; Ikoma, Shuji; Shibata, Masashi; Matsushima, Ryoka; Fukuhara, Choji; Tomita, Yasumasa; Maeda, Yoichiro; Kobayashi, Kenkichiro

doi:10.1016/j.clay.2011.09.001

Cited by 28 publications

(24 citation statements)

References 23 publications

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“…The most prominent approach for organic and especially natural dye protection is their intercalation into inorganic clays, thus having complete operations with “green” natural materials . Abundant bulk clays have to be exfoliated for this purpose, converting to nanomaterials either of lamellar structure with alumo or magnesium/silicate sheets (like kaolin, montmorillonite, bentonite, and hydrotalcite) or tubule and fiber structures (halloysite, imogolite, sepiolite, and palygorskite) ( Figure ).…”

Section: Introductionmentioning

confidence: 99%

Stabilized Dye–Pigment Formulations with Platy and Tubular Nanoclays

Micó-Vicent

Verdú

Новиков

et al. 2017

Adv Funct Materials

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Alumosilicate materials of different morphologies, such as platy and tubule nanoclays, may serve as an efficient, protective encasing for colored organic substances and nanoparticles. The adsorption of dyes onto the nanoclays increases their stability against thermal, oxidative, and acid-base-induced decomposition. Natural organic dyes form stable composites with clays, thus allowing for "green" technology in production of industrial nanopigments. In the presence of high-surface-area alumosilicate materials, semiconductor nanoparticles known as quantum dots are stabilized against agglomeration during their colloid synthesis, resulting in safe colors. The highly dispersed nanoclays such as tubule halloysite can be employed as biocompatible carriers of quantum dots for the dual labeling of living human cells-both for dark-field and fluorescence imaging. Therefore, complexation of dyes with nanoclays allows for new, stable, and inexpensive color formulations.

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Section: Introductionmentioning

confidence: 99%

Stabilized Dye–Pigment Formulations with Platy and Tubular Nanoclays

Micó-Vicent

Verdú

Новиков

et al. 2017

Adv Funct Materials

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“…We expected nanoclay to be a significant factor because the selected natural dyes were anionic. However, the surfactant-silane modifiers allowed adsorption in both nanoclays because of nanoclay interlayer and surface modifications [21]. Performance during the synthesis process under these conditions depended only on the molecular structure of the natural dyes, e.g.…”

Section: Adsorptionmentioning

confidence: 99%

“…Performance during the synthesis process under these conditions depended only on the molecular structure of the natural dyes, e.g. aggregation, orientations and charge density [22,21].…”

Section: Adsorptionmentioning

confidence: 99%

A combination of three surface modifiers for the optimal generation and application of natural hybrid nanopigments in a biodegradable resin

et al. 2016

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Our purpose was to improve the thermal, mechanical, and optimal properties of an epoxy bioresin using optimum hybrid natural pigments previously synthetized in our lab. Then, we searched the best combinations of factors in the synthesis of natural hybrid nanopigments, and then incorporated them into the bioresin. We combined three structural modifiers in the nanopigment synthesis, surfactant, coupling agent (silane) and a mordant salt (alum), selected to replicate mordant textile dyeing with natural dyes.We used Taguchi's design L8 to seek final performance optimisation. We selected three natural dyes, chlorophyll, beta-carotene and beetroot extract, and used two laminar nanoclay types, montmorillonite, and hydrotalcite. The thermal, mechanical and colorimetric characterisation of the composite obtained by mixing natural hybrid nanopigments (bionanocomposite) was made. The natural dye interactions with both nanoclays improved the natural dyes and bioresin's thermal stabilities, colour performance and UV-VIS light exposure stability. The best bionanocomposite materials were found by using an acidic pH [3][4] environment, and modifying nanoclays with mordant and surfactant during the nanopigment synthesis process.

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“…It is reported that various dyes could be stabilized by their adsorption into the interlayer of clays 7,8,12,13) or pores of MPS 3,9,10) . However, AD dyes tend to decompose more easily than AN dyes as the sugar chain from anthocyanin has been removed by hydrolysis in the former.…”

mentioning

confidence: 99%

Anthocyanidin Dye and Al/Fe-Containing Mesoporous Silica Composites and their Color Properties

Lin

Saotome

Kohno

et al. 2013

Journal of the Japan Society of Colour Material

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Stabilization of a hydrophobic natural dye by intercalation into organo-montmorillonite

Abstract: 19The stability of the naturally occurring annatto dye against irradiation with visible light 20 was enhanced by intercalation into octyl trimethylammonium and dodecyl 21 trimethylammonium montmorillonite. The intercalated dye exhibited improved light fastness. 22

Cited by 28 publications

References 23 publications

Stabilized Dye–Pigment Formulations with Platy and Tubular Nanoclays

Stabilized Dye–Pigment Formulations with Platy and Tubular Nanoclays

A combination of three surface modifiers for the optimal generation and application of natural hybrid nanopigments in a biodegradable resin

Anthocyanidin Dye and Al/Fe-Containing Mesoporous Silica Composites and their Color Properties

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