Erratum: X-ray studies of interlayer water absorption and mesoporous water transport in a weakly hydrated clay [Phys. Rev. E<b>82</b>, 036315 (2010)]

Hemmen, Henrik; Alme, L. R.; Fossum, Jon Otto; Méheust, Yves

doi:10.1103/physreve.83.019901

Cited by 9 publications

(23 citation statements)

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“…The interlayer distance corresponding to this angle, calculated according to Bragg's Law, is 1.2 nm (see peak labeled (a) in Figure 3). This value agrees with that reported in the literature for LiFh with one layer of water intercalated in the stacks in ambient conditions [5].…”

Section: Resultssupporting

confidence: 83%

Incorporation of tramadol drug into Li-fluorohectorite clay: A preliminary study of a medical nanofluid

Valdés

Hernández

Menorval³

et al. 2016

Eur. Phys. J. Spec. Top.

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Abstract. During the last years, clays have been increasingly explored as hosts for drugs. In the present paper, we have been able to host the non-steroidal anti-inflammatory drug, Tramadol, into the clay Lifluorohectorite (Li-Fh). We preliminary evaluate its incorporation by means of UV spectroscopy and X ray diffraction. Our results indicate that the clay hosts the drug molecule in its interlayer space. We suggest a set of parameters to guarantee an efficient incorporation process. Future studies will concentrate on the release of the drug from the clay nanofluid. PACS

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Section: Resultssupporting

confidence: 83%

Incorporation of tramadol drug into Li-fluorohectorite clay: A preliminary study of a medical nanofluid

Valdés

Hernández

Menorval³

et al. 2016

Eur. Phys. J. Spec. Top.

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“…It could therefore be possible that the clay was packed in the sample holder in such a way that traces of water vapor surrounding the clay in the sample cell were transferred into the clay which was subjected to the incident X-ray beam. As humidity transport has been shown to be slow in this sample (days/cm), 14 we expect that it would take some time before a water intercalation front reaches the scattering volume and a pure hydration state is detected on the diffraction patterns.…”

Section: B Nitrogen Testmentioning

confidence: 99%

“…At this point we do not know whether a transition to a higher intercalation state (two monolayers of intercalant) could take place with CO2, as is commonly observed in this clay for the case of water. [14][15][16][17] The differences in intensity profile between the initial dehydrated peak and the final intercalated peak have several possible explanations. Firstly we clearly observe a more symmetric shape and a smaller full width at half maximum for the intercalation peak compared to the dehydrated peak.…”

Section: A Co2 Intercalationmentioning

confidence: 99%

“…This transition bears a resemblance to the H2O transitions in NaFh between the dehydrated and monohydrated states, and between the monohydrated and bihydrated states. 14,16 From about 50 to 200 hours after CO2-exposure, the peak intensity increased approximately linearly with with time, and the measurements were stopped after 218 hours, when the intensity had reached a plateau and stopped evolving (see the Supporting…”

Section: A Co2 Intercalationmentioning

confidence: 99%

“…The choice of this particular clay as a starting point for our investigation is both due to its chemical and structural similarities with natural Namontmorillonite and other clays of the same family, and also because its swelling behaviors at different H2O humidities have previously been extensively characterized by our group with the use of Wide Angle X-ray Scattering (WAXS), [14][15][16] and MR spectroscopy. 17 Compared with its natural counterparts, this synthetic clay system contains significantly fewer impurities that could mask the behavior of the clay.…”

Section: +mentioning

confidence: 99%

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X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions

et al. 2012

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We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not too far from ambient. The mean interlayer repetition distance of the clay when CO2 is intercalated is found to be 12.5 Å for the conditions -20 °C and 15 bar. The magnitude of the expansion of the interlayer upon intercalation is indistinguishable from that observed in the dehydrated-monohydrated transition for H2O, but the possibility of water intercalation is ruled out by a careful analysis of the experimental conditions and repeating the measurements exposing the clay to nitrogen gas. The dynamics of the process is observed to be dependent on the pressure, with a higher Page 2 of 15 intercalation rate at increased pressure. The rate of CO2 intercalation at the studied conditions is found to be several orders of magnitude slower than the intercalation rate of water or humidity at ambient pressure and temperature.

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Smectite as ciprofloxacin delivery system: Intercalation and temperature-controlled release properties

Rivera

Valdés

Jiménez

et al. 2016

Applied Clay Science

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Ciprofloxacin (Cipro) incorporation into Li-fluorhectorite (LiFh) clay and its temperaturecontrolled release. with potential pharmaceutical and biomedical applications.Structural characterization of the raw material and the clay-drug composites.Demonstration of the temperature-controlled drug release abilities of a colloidal suspension of the clay-drug composite, following pharmaceutical standards. AbstractClays have shown to be good candidates as drug delivery carriers. In the present paper, we use the temperature-dependent swelling of smectite clays to produce clay-drug composites with sizable drug load capacity. Specifically, we obtain a fluorohectorite-ciprofloxacin (Fh-Cipro) composite, in which a true intercalation of the drug between the clay interlayers has been verified by various experimental techniques. We evaluate the thermally activated drug release from a colloidal suspension of nanosized composite particles in water as well as in synthetic gastric juice from 37 0 C (body temperature) to 85 0 C. The temporal profiles of drug release from the clay fulfil the pharmaceutical standards for these systems. In this work, we have been able to produce a clay-based Temperature Controlled Release System (TCRS) with potential biomedical applications.

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Erratum: X-ray studies of interlayer water absorption and mesoporous water transport in a weakly hydrated clay [Phys. Rev. E82, 036315 (2010)]

Cited by 9 publications

References 0 publications

Incorporation of tramadol drug into Li-fluorohectorite clay: A preliminary study of a medical nanofluid

Incorporation of tramadol drug into Li-fluorohectorite clay: A preliminary study of a medical nanofluid

X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions

Smectite as ciprofloxacin delivery system: Intercalation and temperature-controlled release properties

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