Characterization of inorganic and organic clay modified materials: An approach for adsorption of an insecticidal terpenic compound

Mbouga, Marie Goletti Nguemtchouin; Ngassoum, Martin Benoît; Kamga, R.; Deabate, S.; Lagerge, Serge; Gastaldi, Emmanuelle; Chalier, Pascale; Cretin, Marc

doi:10.1016/j.clay.2014.11.016

Cited by 34 publications

(20 citation statements)

References 32 publications

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“…The XRD patterns of pure Na + ‐MMT and Na + ‐MMT/eugenol mixtures are shown in Figure . Na + ‐MMT exhibits a reflection at 2θ = 8.8° which corresponds to an interlayer space d 001 value of 10 Å, characteristic for this MMT . Other peaks characteristic of the structure of MMT were also observed at 2θ = 20°–23°.…”

Section: Resultsmentioning

confidence: 99%

Soy protein isolate nanocomposite film enriched with eugenol, an antimicrobial agent: Interactions and properties

Nassar

Dombre

Gastaldi

et al. 2017

J of Applied Polymer Sci

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Nanocomposites films were designed from soy protein isolates (SPI), clays (Na+‐MMT), and eugenol an antimicrobial agent. Interactions between Na+‐MMT and eugenol were evidenced by a shift of the d‐spacing by X‐ray diffraction analysis. The addition of Na+‐MMT (5 and 7.5% w/w) in SPI solution increased its shear thinning behavior and its consistency. Accordingly, a good exfoliation of clays in SPI films was observed. The glass transition temperature of SPI films was impacted by the clays addition but not the water vapor permeability. In contrast, the addition of eugenol in SPI solution did not affected the consistency but induced a decrease of the SPI film Tg and an increase of the water vapor permeability. The presence of eugenol counterbalanced the effect of clays on consistency of film‐forming solution. The clay intercalation process was facilitated and the water vapor permeability and active agent release were modified. The presence of clay did not affect the antibacterial effect of eugenol/SPI films. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45941.

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Section: Resultsmentioning

confidence: 99%

Soy protein isolate nanocomposite film enriched with eugenol, an antimicrobial agent: Interactions and properties

Nassar

Dombre

Gastaldi

et al. 2017

J of Applied Polymer Sci

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“…is model was based on the assumption that the rate-limiting step might be chemical sorption or chemisorption involving valence forces through sharing or exchange of electrons between the adsorbent and the adsorbate [27,28]. Similar results have been reported in the study of the adsorption of thymol onto clay-based adsorbents [14,29], the adsorption of the basic yellow cationic dye onto Moroccan stevensite [5], and the adsorption of methyl violet onto rich clay stevensite from Morocco [6]. e intraparticle diffusion model proposed by Weber and Morris [30] is given by…”

Section: Adsorption Kinetics Frommentioning

confidence: 79%

“…e adsorption of essential oils onto a support such as clays is a technique that will immobilize volatile compounds, stabilize the essential oil and protect it against light, and modulate its release over time. Similar studies were done; montmorillonite and kaolinite have been tested as effective materials for the adsorption of terpenic compounds, and the use of loaded clays as new natural insecticides has been proposed [13,15,16]; especially, the adsorption of thymol onto the purified bentonite and its counterpart modifies part CTAB [14].…”

Section: Introductionmentioning

confidence: 76%

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Adsorption of Thymol onto Natural Clays of Morocco: Kinetic and Isotherm Studies

Ziyat¹,

Bennani²,

Hajjaj

et al. 2020

Journal of Chemistry

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e present work aims to study the affinity of a component of the thyme essential oil "thymol" to natural Moroccan clay "Rhassoul" using the adsorption technique. e physicochemical characterizations of the purified and modified clay were carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), DTA/TGA, and SEM-EDX. ymol adsorption tests on the purified Rhassoul (Rh-P) and the modified one by CTAB (Rh-CTAB) were followed by UV-visible spectroscopy. ey show that the adsorption isotherms can be described by the Freundlich model and that the kinetics of adsorption is in accordance with the pseudo-second-order model for the two clays. Adsorption capacities obtained were of the order of 6 mg/g for the purified Rhassoul and 16 mg/g for the modified Rhassoul by cetyltrimethylammonium bromide (CTAB). ese values show that the modified Rhassoul has a better adsorption capacity compared to the purified Rhassoul.

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“…11 Sais quaternários de amônio são os mais comumente utilizados para esse tipo de modificação, já que podem facilmente substituir os cátions mono ou divalentes presentes na argila bentonita. [12][13][14][15][16][17] Porém, os cátions quaternários de amônio não conseguem suportar temperaturas de processamento muito elevadas, 18-21 sendo assim, argilas organofílizadas por meio de um sal de amônio são menos adequadas para utilização em materiais que utilizam altas temperaturas de processamento, como em polímeros contendo argilas como reforço, que são submetidos a processos de extrusão. 20 Na literatura, a estabilidade térmica dos sais de fósforo é descrita sendo superior à apresentada por sais de amônio.…”

Section: Introductionunclassified

Organofilização E Silanização De Argila Bentonita

Baruel¹,

Dutra²,

Baldan³

et al. 2017

Quim. Nova

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One of the most usual applications is their incorporation into organic materials. Nonetheless, natural clays are hydrophobic being incompatible with organic medium. Clay organophilization can be reached by several methods such as by exchange of the interlayer sodium cations by organic cations, and by silanization of the clay layers. In this study the bentonite clay was organophilized by the addition of the methoxymethyltriphenylphosphonium chloride (CTFF). Further, the organoclay was silanized with (3-glycidyloxypropyl) trimethoxysilane (GPTMS). X-ray fluorescence results, infrared and XPS spectroscopy showed the presence of phosphorus in the organophilic clay. The interlayer space, obtained by X-ray diffraction, increased in 55% after the CTFF addition showing the cationic exchange in the clay lamellar region. After the silanization of the organoclay the interlayer space was slightly reduced from 1,78 nm to 1,72 nm, indicating that the silane molecules were preferential bound in the clay edges.Keywords: organoclay; bentonite; silane; quaternary phosponium salt. INTRODUÇÃOA argila é definida como um material terroso, de granulação fina, apresenta alta plasticidade em água 1-3 e é formada pelo empacotamento de lamelas cristalinas.1,3-5 A bentonita uma das argilas de maior interesse tecnológico, 3,6,7 apresenta em sua configuração cátions interlamelares, que podem ser trocados por cátions orgânicos ou inorgânicos quando presentes em solução aquosa, influenciando suas propriedades físico-químicas e alterando seu espaçamento basal, essa propriedade é chamada de capacidade de troca catiônica (CTC). [2][3][4]8,9 O termo bentonita é comumente usado para designar argilas constituídas principalmente por argilomineral ou argilominerais esmectíticos, sendo o argilomineral mais frequentemente encontrado a montmorilonita. Essa classe de argilas é constituída principalmente por silicatos de alumínio e magnésio do tipo 2:1, no qual uma folha octaédrica está entre duas folhas tetraédricas. Esse silicato possui deficiência de cargas positivas em sua estrutura cristalina, resultando em excesso de cargas negativas, que é contrabalanceado por cátions interlamelares alcalinos, Na+ ou K+. A montmorilonita é caracterizada pela sua capacidade de troca catiô-nica, que permite que os cátions inorgânicos sejam substituídos por cátions orgânicos, aumentando seu caráter apolar, e possibilitando sua incorporação em meios orgânicos.3 Após a troca catiônica as argilas são denominadas argilas organofílicas ou organofilizadas, e a partir dessas é possível se obter complexos argila-compostos orgânicos.2,10 As argilas organofilizadas são mais facilmente incorporadas em sistemas orgânicos, como em cosméticos, tintas à base de solventes orgânicos, polímeros apolares e lubrificantes. A substituição de cátions de sódio por cátions orgânicos, em geral, causa um aumento da distância basal da argila, o que pode ser observado pela técnica de difração de raios-X (XRD) e, usualmente, quanto maior a cadeia orgânica do sal maior será a distância interlamelar ...

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Characterization of inorganic and organic clay modified materials: An approach for adsorption of an insecticidal terpenic compound

Cited by 34 publications

References 32 publications

Soy protein isolate nanocomposite film enriched with eugenol, an antimicrobial agent: Interactions and properties

Soy protein isolate nanocomposite film enriched with eugenol, an antimicrobial agent: Interactions and properties

Adsorption of Thymol onto Natural Clays of Morocco: Kinetic and Isotherm Studies

Organofilização E Silanização De Argila Bentonita

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