The use of a laponite dispersion to increase the hydrophilicity of cobalt-ferrite magnetic nanoparticles

Aguiar, Adriano Saraiva; Michels, Leander; Silva, F.G. da; Kern, Cynara; Gomide, Guilherme; Ferreira, Caio M.; Depeyrot, J.; Aquino, Renata; Silva, G.J. da

doi:10.1016/j.clay.2020.105663

Cited by 11 publications

(10 citation statements)

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“…[ 12 ] This structure generates sheets of 1 nm thickness and various widths. [ 13 ] Synthetic production techniques have been able to achieve a well‐controlled diameter of 25–30 nm for Laponite materials. [ 14 ] Laponite is negatively charged (≈0.2–0.6 charge per formula unit) due to the isomorphic substitution of magnesium ions (Mg 2+ ) with lithium ions (Li + ) in the lattice structure forming a net negative charge on the surface that is balanced by cations such as sodium ions.…”

Section: Introductionmentioning

confidence: 99%

“…[18] These favorable physicochemical properties of Laponite particles make them strong drug carrier candidates for controlled drug release purposes. [9][10][11][12][13][19][20][21][22][23] Nevertheless, a recent search for "Laponite" and "drug delivery" in the PubMed database (September 2021) revealed only 77 relevant papers published from 2005 to this date. It is important to note that more than 70% of these 77 papers were published as of 2016, demonstrating that Laponite has become an increasingly attractive nanoparticle-based drug delivery system in recent years due to its unique characteristics, such as pH responsiveness.…”

Section: Introductionmentioning

confidence: 99%

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Laponite‐Based Nanomaterials for Drug Delivery

Kiaee

Dimitrakakis

Sharifzadeh

et al. 2022

Adv Healthcare Materials

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Laponite is a clay-based material composed of synthetic disk-shaped crystalline nanoparticles with highly ionic, large surface area. These characteristics enable the intercalation and dissolution of biomolecules in Laponite-based drug delivery systems. Furthermore, Laponite's innate physicochemical properties and architecture enable the development of tunable pH-responsive drug delivery systems. Laponite's coagulation capacity and cation exchangeability determine its exchange capabilities, drug encapsulation efficiency, and release profile. These parameters are exploited to design highly controlled and efficacious drug delivery platforms for sustained drug release. In this review, they provide an overview of how to design efficient delivery of therapeutics by leveraging the properties and specific interactions of various Laponite-polymer composites and drug moieties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laponite‐Based Nanomaterials for Drug Delivery

Kiaee

Dimitrakakis

Sharifzadeh

et al. 2022

Adv Healthcare Materials

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“…These rehydrated samples allowed us to quantify the initial amount of H 2 O in the clay mineral layers as well as to describe different hydration states. This procedure was also used in refs , , .…”

Section: Methodsmentioning

confidence: 99%

“…For instance, X-ray diffraction (XRD) provides a direct measurement of the interlayer distance as a function of water content from the measurement of the angular positions of Bragg reflections, and valuable information (basal spacing, crystallite size, and induced lattice strain) about the water adsorption process can be readily obtained − from peak shape evaluation and comparison with data modeling. In addition, quasi-elastic neutron scattering (QENS), ,, nuclear magnetic resonance (NMR), ,− infrared spectroscopy (IR), − and computer simulations ,− provide valuable insights on water mobility, such as the diffusion coefficient in the interlayer, proton exchange dynamics, cation mobility, etc.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li⁺ or Na⁺

et al. 2020

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For applications benefitting from the swelling properties of nanolayered silicates (clay minerals), it is of paramount importance to understand the hysteresis in the clay−water interaction. In this context, the present work investigates how the thermal history of Na + -and Li + -intercalated fluorohectorite affects the hydration process. By combining X-ray diffraction and thermogravimetric analysis, water adsorption of preheated and non-preheated fluorohectorite was measured and analyzed in terms of the characteristic interlayer distance. The number of water molecules per cation was also inferred. We find that some of the hydration states in preheated samples are suppressed, and transitions to higher hydration states are achieved at higher relative humidity values. This could be due to the initial water content that facilities crystalline swelling. However, the data for Li-fluorohectorite do not exclude the possibility of a low temperature Hofmann−Klemen effect at 150 °C. Our study also provides strong hints that the so-called 1.5 water layer state, observed in previous studies on smectites, is a metastable state. In addition, the impact of a hydrogenous structure in the interlayer space of Li-fluorohectorite on the clay's hydration behavior is demonstrated. The results, if generalized, would have strong implications on a wide range of applications, where the thermal history of smectites is important.

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“…All-in-all the very active ongoing scientific work on natural [140,141] and/or synthetic [142,143] , including FHt [144,145,146,147] , and in particular on FHt-B, should extend dramatically the mentioned applications and hint to new ones. FHt is an important material in clay science that definitely underlines the statement that "clays may be considered the material of the 21 st century" [8] .…”

Section: * Perovskites and Other Framework Structure Crystalline Materials * P 626mentioning

confidence: 99%

Experimental methods to study clay minerals and perspective applications of Fluorohectorite

et al. 2021

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Fluorohectorite is a synthetic 2:1 layer smectite clay where the presence of exchangeable cations located between water molecules in the interlayer space allows for expansion of the crystal lattice. This swelling property is extremely relevant to many applications including water treatment, bioactive molecules intercalation (drug delivery), soil remediation, CO2capture as well as extra-terrestrial environment studies. In the present chapter, the aim is to discuss why Fluorohectorite can be in particular advantageous for many applications where retention of big volumes is an issue. We will also discuss on the main experimental techniques used to study these materials.

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The use of a laponite dispersion to increase the hydrophilicity of cobalt-ferrite magnetic nanoparticles

Cited by 11 publications

References 58 publications

Laponite‐Based Nanomaterials for Drug Delivery

Laponite‐Based Nanomaterials for Drug Delivery

The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li⁺ or Na⁺

Experimental methods to study clay minerals and perspective applications of Fluorohectorite

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The use of a laponite dispersion to increase the hydrophilicity of cobalt-ferrite magnetic nanoparticles

Cited by 11 publications

References 58 publications

Laponite‐Based Nanomaterials for Drug Delivery

Laponite‐Based Nanomaterials for Drug Delivery

The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li+ or Na+

Experimental methods to study clay minerals and perspective applications of Fluorohectorite

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Product

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The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li⁺ or Na⁺