A stepwise mechanism for intercalating hydrophobic organics into multilayered clay nanostructures

Chiou, Jau-Yu; Hsu, Ru-Siou; Chiu, Chih‐Wei; Lin, Jiang‐Jen

doi:10.1039/c3ra42037j

Cited by 14 publications

(13 citation statements)

References 37 publications

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“…Intercalation is simply the process of inserting one molecule or chemical compound into a differently layered structure. 98 Layered double hydroxides (LDHs) and their complexes with several materials offer a key group of resources suitable for a number of current and future uses for biochemical and environmental developments. The compositional variety, lamellar structure, and biocompatibility characteristics of LDHs, together with their simplicity for larger scale synthesis attracted the interest of many groups in the field.…”

Section: The Role Of Ceftriaxone Nanostructures In Countering Amrmentioning

confidence: 99%

The contribution of nano‐based strategies in overcoming ceftriaxone resistance: a literature review

Yayehrad

Marew

Birhanu

2021

Pharmacology Res & Perspec

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Antimicrobial drug resistance, including resistance to multiple antibiotics, is continuously increasing. According to research findings, many bacteria resistant to other antibiotics were susceptible to ceftriaxone. However, over the last few years, ceftriaxone resistance has become growing and extremely worrisome challenge to the global healthcare system and several strategies have been initiated to contain the spread of antimicrobial drug resistance. Its extended use for therapeutic or preventative measures in humans and farm animals resulted in the development and spread of resistance. Recent advances in nanotechnology also offer novel formulations based on distinct types of nanostructure particles with different sizes and shapes, and flexible antimicrobial properties. For ceftriaxone, several nanostructured formulations through conjugation, intercalation, encapsulation with lipid carrier, and polymeric films have been investigated by different groups with promising results in combating the development of resistance. This review addressed the existing knowledge and practice on the contribution of nano‐based delivery approaches in overcoming ceftriaxone resistance. Evidences have been generated from published research articles using major search electronic databases such as PubMed, Medline, Google Scholar, and Science Direct.

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Section: The Role Of Ceftriaxone Nanostructures In Countering Amrmentioning

confidence: 99%

The contribution of nano‐based strategies in overcoming ceftriaxone resistance: a literature review

Yayehrad

Marew

Birhanu

2021

Pharmacology Res & Perspec

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“…With XRD analyses, the d spacing was measured before and aer absorption of paraffin (Table 2). This process, consisting of two stages of intercalation, 17 was reported previously for the hydrophobic effect in the second stage involving incorporating the hydrocarbon. The rst intercalation involved the ionic exchange reaction with the ODA-salt through an exchange of the counter ions in Na + -MMT leading to a incorporated hydrophobic force that attracted the second stage of hydrocarbon accessibility to become PCM.…”

Section: Hydrocarbon Absorbing Properties Of the Organoclaysmentioning

confidence: 99%

“…The phenomenon of d spacing expansion for the two-stage intercalation was reported earlier. 17,21 A conceptual illustration of paraffin incorporation in clay layered structure of ODA/MMT is shown in Scheme 1.…”

Section: Hydrocarbon Absorbing Properties Of the Organoclaysmentioning

confidence: 99%

“…It is allowable for the clay to be organically modied by an ionic exchanging reaction to adjust interlayer galleries in its nanostructure. Intercalating amine-salts could enlarge basal spacing of the clay and make it accessible for absorbing other hydrophobic organics 17,18 That hydrophobic modication made the modied MMT capable of absorbing crude oils 19,20 for an application of remedying oil pollution in water.…”

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Phase change materials of fatty amine-modified silicate clays of nano layered structures

2017

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Fatty-amine modified silicate clays of layered structure were prepared by conventional intercalation of noctadecyl amine (n-C 18 H 37 NH 2 , ODA) into sodium montmorillonite clay (Na + -MMT). Organically modified clays are considered as a new type of phase change materials (PCM). At one equivalent ratio of ODA-HCl over Na + -MMT by an ionic exchange reaction, the interlayer galleries of the silicates' layered structure were expanded from 12Å to 28Å as measured by X-ray diffraction (XRD) analysis. As a result, the organoclay (ODA/MMT) became hydrophobic and spacing was accessible for incorporating a second organic compound, n-octadecane. Physical absorption of n-octadecane in ODA/MMT allowed interlayer spacing and further expansion from 28Å to 30Å. Absorption efficiency, defined as the weight of noctadecane over ODA/MMT, ranged from 5.3 to 9.1 fold depending on the amount of ODA intercalation.Since n-octadecane is a kind of paraffin wax, a phase change temperature of 25-29 C was observed.The n-octadecane was characterized by thermal gravimetric analysis (TGA) to study absorption efficiency of ODA/MMT. During the heating process, the ODA/MMT/n-octadecane powder remained in solid state without any liquid leakage at 80 C (far beyond the phase change temperature). Thus, the organoclay (ODA/MMT) can be used as good thermal storage and phase change material.

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“…The surface of montmorillonite is commonly modified with a cation exchange technique to expand the basal spacing and make the layered silicate compatible with most hydrophobic polymer [7]. Because of the weak interactions between the nano-layers, the cations can be easily exchanged with alkyl ammonium cations, or phophonium salts thus making the layered silicate compatible with the rubber matrix [8,9]. Also organochlorosilanes are used for the modification of montmoriollinite silica surfaces, by covalent grafting on interfaces [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Organophilization and Interlamellar Silylation of Montmorillonite on Compatiblization of Polymer Composites

Rahim¹,

Ismail²,

Kandil³

2016

Adv. Sci. Technol. Res. J.

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Sodium montmorillonite (Na-Mt) was modified by cetyltriemethylammoniumbromide (CTAB) through cation exchange technique followed by grafting with 3-aminopropyltriethoxysilane (APT). The effects of organophillic surface treatments of montmorillonite on compatibilization of natural rubber (NR) /acrylonitrile butadiene rubber (NBR) blends was investigated. Physico-mechanical properties of rubber nanocomposites compatibilized with organomodified montmorillonite revealed strong nanocomposite with high tensile properties, impact strength and good resistance to flex fatigue, abrasion and compression set. Dynamic mechanical thermal analysis (DMTA) revealed a marked increase in storage modulus (E') and lesser damping characteristics of organically modified clay mineral polymer nanocomposites (CPN) due to intercalation of organophilic montmorillonite by rubber matrix. The morphology of the blends became homogeneous and smoother with the presence of exofoliated/intercalated organically modified montmorillonite. Organomodified layered silicate sheets of montmorillonite greatly enhanced barrier properties by creating tortuous path that retarded the progress of solvent molecules through rubber matrix.

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A stepwise mechanism for intercalating hydrophobic organics into multilayered clay nanostructures

Cited by 14 publications

References 37 publications

The contribution of nano‐based strategies in overcoming ceftriaxone resistance: a literature review

The contribution of nano‐based strategies in overcoming ceftriaxone resistance: a literature review

Phase change materials of fatty amine-modified silicate clays of nano layered structures

Effect of Organophilization and Interlamellar Silylation of Montmorillonite on Compatiblization of Polymer Composites

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