Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies

Leroux, Fabrice; Taviot-Guého, Christine

doi:10.1039/b505014f

Cited by 325 publications

(183 citation statements)

References 129 publications

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“…2,18 This is a very useful method, especially for the intercalation of organic molecules, and many different anions have been successfully incorporated in LDHs, such as caprolactam, organic chromospheres, dyes, surfactants, and metal complex anions, and this is even a very useful method for the intercalation of nonionized species, eg, sugar molecules like pentoses. [29][30][31][32][33] The whole process of rehydration should be carried out under an inert nitrogen atmosphere.…”

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confidence: 99%

Inorganic nanolayers: structure, preparation, and biomedical applications

Saifullah¹,

Hussein²

2015

IJN

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Hydrotalcite-like compounds are two-dimensional inorganic nanolayers also known as clay minerals or anionic clays or layered double hydroxides/layered hydroxy salts, and have emerged as a single type of material with numerous biomedical applications, such as drug delivery, gene delivery, cosmetics, and biosensing. Inorganic nanolayers are promising materials due to their fascinating properties, such as ease of preparation, ability to intercalate different type of anions (inorganic, organic, biomolecules, and even genes), high thermal stability, delivery of intercalated anions in a sustained manner, high biocompatibility, and easy biodegradation. Inorganic nanolayers have been the focus for researchers over the last decade, resulting in widening application horizons, especially in the field of biomedical science. These nanolayers have been widely applied in drug and gene delivery. They have also been applied in biosensing technology, and most recently in bioimaging science. The suitability of inorganic nanolayers for application in drug delivery, gene delivery, biosensing technology, and bioimaging science makes them ideal materials to be applied for theranostic purposes. In this paper, we review the structure, methods of preparation, and latest advances made by inorganic nanolayers in such biomedical applications as drug delivery, gene delivery, biosensing, and bioimaging.

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confidence: 99%

Inorganic nanolayers: structure, preparation, and biomedical applications

Saifullah¹,

Hussein²

2015

IJN

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“…Hidróxidos lamelares duplos (LDH) são argilas aniônicas sintéticas de fácil preparação e baixo custo com grande potencial de utilização como carga de reforço em PLN ), respectivamente. A n-é o anion interlamelar tal como CO 3 2-, NO 3 -ou Cl - [6,7] . O processo de obtenção de nanocompósitos envolve o estabelecimento da compatibilidade entre a carga inorgânica, de natureza hidrofílica e a matriz polimérica.…”

Section: Introductionunclassified

Compósitos de Poliestireno e Argila Aniônica Funcionalizada com Cinamato com Propriedade de Absorção de UV

Silva¹,

Zanetti²,

Donato³

et al. 2013

Polímeros

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Resumo:Compósitos de poliestireno com 1, 3 e 5% em massa de argila aniônica funcionalizada com cinamato foram preparados no estado fundido em extrusora de rosca dupla co-rotacional seguido de moldagem por injeção, a fim de se obter materiais com propriedades diferenciadas e absorvedores de radiação UV, utilizando processos comumente disponíveis industrialmente. A caracterização dos compósitos realizou-se através das técnicas de DRX, MET, TG, DSC, UV-Vis, SAXS e ensaios mecânicos diversos (tração, impacto, flexão e dureza). O aumento da distância interlamelar da argila após o processamento indicou a intercalação do poliestireno. Um baixo grau de dispersão de argila foi alcançado e os compósitos de poliestireno se constituíram de fases intercaladas e microtactóides. Em geral, os compósitos apresentaram propriedades mecânicas (tração, flexão, impacto Izod e dureza) similares ao poliestireno puro. Entretanto, os mesmos são capazes de absorver a radiação UV, o que aumentou proporcionalmente ao teor de argila, e, desta forma, apresentam potencial para utilização como filtros de radiações nocivas. Palavras-chave: Compósito polimérico, argila aniônica, poliestireno, absorvedor de UV. Composites of Polystyrene and Cinnamate Functionalized Anionic Clay with UV Absorption CharacteristicsAbstract: Polystyrene composites with 1, 3 and 5% in weight of cinnamate-functionalized anionic clay were prepared following a melt state intercalation route using twin-screw co-rotational extrusion followed by injection molding in order to obtain materials with distinct and UV absorbing properties using commonly available processes. The composites were characterized by XRD, MET, TG, DSC, UV-Vis, SAXS and mechanical testing (tensile, impact, flexural and hardness). The interlamellar distance of the clay galleries increased after melt blending as a result of polystyrene intercalation. A moderate degree of clay dispersion was achieved and the polystyrene composites comprised intercalated phases and clay microtactoids. The composites showed mechanical properties generally similar to neat polystyrene. Nevertheless, the polystryrene composites were able absorbing UV light, which increased with increasing clay-content, and showed potential use as filter against this harmful radiation.

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“…LDHs or hydrotalcite-like materials [12][13][14] are a class of anionic clays whose general formula is [M(II)1-xM(III)x(OH) 2] x+ [Ax/n n-• mH2O]…”

Section: Introductionmentioning

confidence: 99%

The effects of intralayer metal composition of layered double hydroxides on glass transition, dispersion, thermal and fire properties of their PMMA nanocomposites

Manzi-Nshuti

Chen

et al. 2009

Thermochimica Acta

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A series of aluminum-containing layered double hydroxides (LDHs), containing Mg, Ca, Co, Ni, Cu and Zn as the divalent metals, have been prepared by the co-precipitation method and used to prepare nanocomposites of PMMA by in situ bulk polymerization. The additives were characterized by Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy (XRD) and thermogravimetric analysis while the polymer composites were characterized by XRD, transmission electron microscopy, differential scanning calorimetry and cone calorimetry. Polymerization of methyl methacrylate in the presence of these undecenoate LDHs results in composites with enhanced thermal stability. The glass transition temperatures of the composites and the pristine polymers are found to be around 110 C; this suggests that the presence of these additives has little effect on the polymer. It is found that the additive composition and the dispersion state of LDHs agglomerates in the polymer matrix influence the fire properties of composites as measured by cone calorimetry.

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Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies

Cited by 325 publications

References 129 publications

Inorganic nanolayers: structure, preparation, and biomedical applications

Inorganic nanolayers: structure, preparation, and biomedical applications

Compósitos de Poliestireno e Argila Aniônica Funcionalizada com Cinamato com Propriedade de Absorção de UV

The effects of intralayer metal composition of layered double hydroxides on glass transition, dispersion, thermal and fire properties of their PMMA nanocomposites

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Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies

Cited by 325 publications

References 129 publications

Inorganic nanolayers: structure, preparation, and&nbsp;biomedical applications

Inorganic nanolayers: structure, preparation, and&nbsp;biomedical applications

Compósitos de Poliestireno e Argila Aniônica Funcionalizada com Cinamato com Propriedade de Absorção de UV

The effects of intralayer metal composition of layered double hydroxides on glass transition, dispersion, thermal and fire properties of their PMMA nanocomposites

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Product

Resources

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Inorganic nanolayers: structure, preparation, and biomedical applications

Inorganic nanolayers: structure, preparation, and biomedical applications