Modeling of essential oils adsorption onto clays towards a better understanding of their interactions

Nakhli, Asma; Mbouga, Marie Goletti Nguemtchouin; Bergaoui, Manel; Khalfaoui, Mohamed; Cretin, Marc; Huguet, Patrice

doi:10.1016/j.molliq.2017.11.012

Cited by 20 publications

(8 citation statements)

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“…The bands at ~3415 cm –1 and at 1634 cm –1 in the K 0 spectrum (Fig. 5b) are attributed to the water adsorbed on the surface (Nakhli et al , 2018). These two bands are more intense on the spectrum of K 0 than on that of Y 0 , which is in agreement with the fact that K 0 contains more smectite than Y 0 .…”

Section: Resultsmentioning

confidence: 98%

“…5c,d). This indicates a new hydrophobic character of the modified clays, which should increase the adsorption capacity of the clays towards hydrophobic terpenic compounds (Nguemtchouin et al , 2015; Nakhli et al , 2018). The appearance of new bands (2955, 2927, 2925, 2856, 2854, 1483, 1465, 1457, 1430 and 1376 cm –1 ) on the spectra of the modified samples indicates the adsorption of the surfactant on these clays (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption ofLippia multifloraessential oil on two surfactant-modified clays: qualitative approach

et al. 2020

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This paper deals with the adsorption of an essential oil (EO) on a kaolinite-rich clay and a smectite-rich clay. The two clays were modified with a quaternary alkyl ammonium surfactant to create a lipophilic environment for better adsorption of the EO. The preparation of the clay/EO hybrids avoided the use of a slurry and organic solvent. The selected EO was that of Lippia multiflora. This EO has insecticidal properties. The surfactant was trioctyl methylammonium (TOMA). The modified clays were characterized by X-ray diffraction (XRD) and infrared (IR) spectroscopy. The smectite-rich clay displayed greater adsorption of the L. multiflora EO compared to the kaolinite-rich clay. The interlayer space of the kaolinite-rich clay was not affected by the adsorption of the TOMA and/or EO molecules, which suggests that the adsorption in this clay took place on the external surface. By contrast, a significant increase in the interlayer space of the smectite-rich clay was observed, suggesting that the adsorption process of TOMA and/or EO took place on both the external and internal surfaces. The IR analysis showed that the surfactant loading in the interlayer space of the smectite-rich clay introduces a gauche conformation in the alkyl chains. A formulation mixing this local smectite-rich clay and the L. multiflora EO has potential for the manufacture of new biopesticides.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Adsorption ofLippia multifloraessential oil on two surfactant-modified clays: qualitative approach

et al. 2020

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“…Regarding essential oils (EOs), they have been also considered as functional additives in food packaging and cosmetic sectors due to their antibiotic and flavoring properties [11]. However, these compounds are highly volatile and biodegradable showing low persistency in the environment [12]. These drawbacks have limited natural dyes and EOs to be used in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lemon Waste Natural Dye and Essential Oil Loaded into Laminar Nanoclays on Thermomechanical and Color Properties of Polyester Based Bionanocomposites

et al. 2020

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In this work, polyester-based nanocomposites added with laminar nanoclays (calcined hydrotalcite, HT, and montmorillonite, MMT) loaded with lemon waste natural dye (LD) and essential oil (LEO) were prepared and characterized. The optimal conditions to synthetize the hybrid materials were obtained by using statistically designed experiments. The maximum LD adsorption with HT was found using 5 wt% of surfactant (sodium dodecyl sulfate), 5 wt% of mordant (aluminum potassium sulfate dodecahydrate) and 50% (v/v) ethanol. For MMT, 10 wt% of surfactant (cetylpyridinium bromide), 5 wt% of mordant, 1 wt% of (3-aminopropyl) triethoxysilane and 100% distilled water were used. LEO adsorption at 300 wt% was maximized with MMT, 10 wt% of surfactant and 50 °C following an evaporation/adsorption process. The obtained hybrid nanofillers were incorporated in a polyester-based matrix (INZEA) at different loadings (3, 5, and 7 wt%) and the obtained samples were characterized in terms of thermal stability, tensile behavior, and color properties. HT_LEM-based samples showed a bright yellow color compared to MMT_LEM ones. The presence of lemon hybrid pigments in INZEA-based systems produced a remarkable variation in CIELAB color space values, which was more visible with increasing the nanofillers ratio. A limited mechanical enhancement and reduced thermal stability was observed with the nanopigments addition, suggesting a limited extent of intercalation/exfoliation of MMT and HT in the polymer matrix. MMT_LEM pigments showed higher thermal stability than HT_LEM ones. A significant increase in Young’s modulus of nanocomposites loaded with hybrid LEO was observed compared to the biopolymer matrix. The LEO inclusion into the nanoclays efficiently improved its thermal stability, especially for MMT.

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“…In fact, hydrogen bonding can occur by the interaction of hydroxyl groups in clay molecules with an unsaturated carbon atom or the aliphatic ring of terpenoid molecule. The hydrophobic interaction may appear between the hydrophobic terpenoids and the hydrophobic character of the lecithin molecules adsorbed in the clay (Nakhli et al, 2018).…”

Section: Tablementioning

confidence: 99%

Organo-montmorillonite with biogenic compounds to be applied in antifungal coatings

Fernández

Roque

Gámez-Espinosa

et al. 2020

Applied Clay Science

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Antimicrobial surfaces are required to obtain more hygienic indoor environments. There are biogenic compounds like terpenoids, from plant essential oils, with potential antimicrobial activity. Besides, modified montmorillonites are promising nanoscale carriers for these compounds. The aim of this research was to prepare antimicrobial coatings with funtionalized montmorillonite hybrid. Three monoterpene compounds from plant essential oils such as citral, citronellol and linalool were assessed to obtain an eco-friendly and cheap antifungal hybrid filler for coatings. A natural surfactant such as soybean lecithin was used as an organic modifier of the clay mineral. The synthetized hybrids were studied with X-ray diffraction (XRD) analysis, thermogravimetric Analysis (TG), Fourier-Transform Infrared (FTIR) spectroscopy, Zeta potential (ZP) and scanning electron microscopy (SEM). The modified montmorillonite with soybean lecithin and citronellol by 40% wt. showed higher antifungal activity. This bioactive hybrid achieved to impart its functionality into a waterborne paint formulated with 5% wt. in bioassays against three frequent and handful moulds Chaetomium globosum (KU936228), Alternaria alternata (KU936229) and Aspergillus fumigatus (KU936230).

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Modeling of essential oils adsorption onto clays towards a better understanding of their interactions

Cited by 20 publications

References 73 publications

Adsorption ofLippia multifloraessential oil on two surfactant-modified clays: qualitative approach

Adsorption ofLippia multifloraessential oil on two surfactant-modified clays: qualitative approach

Effect of Lemon Waste Natural Dye and Essential Oil Loaded into Laminar Nanoclays on Thermomechanical and Color Properties of Polyester Based Bionanocomposites

Organo-montmorillonite with biogenic compounds to be applied in antifungal coatings

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