Investigating the expanding behavior and thermal stability of HDPy modified organo-bentonite by X-ray diffraction technique

Oruçoğlu, Esra; Schroeder, Paul A.

doi:10.1016/j.clay.2016.05.021

Cited by 7 publications

(4 citation statements)

References 38 publications

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“…The value corresponding to this peak belongs to the distance between the two layers, giving the basal space calculated by Bragg's equations 49 at 12.04 nm. Another prominent peak is at the 28.5°, the peak of the (003) surface of montmorillonite, as reported by Orucoglu et al 50 As also seen in the preattritor Na-MMT curve (Figure 5g), along with prominent montmorillonite peaks, Illite was found at around 8.8°, clinoptilolite at 10.2°, and quartz, calcite, and dolomite minerals at 27, 28.5, and 29.5°, respectively. Similar findings were obtained from the same samples previously studied by Bulut et al, Orucoglu et al, and O ̈nal et al 48,50,51 However, it is quite difficult to make these inferences from the XRD pattern of postattritor nano-MMT.…”

Section: Ee%supporting

confidence: 82%

Enhancing the Kinetic Stability of Polymeric Nanomicelles (PLGA) Using Nano-Montmorillonite for Effective Targeting of Cancer Tumors

et al. 2022

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The toxic profile of chemical cross-linkers used in enhancing the stability of self-assembled nanomicelles made of amphiphilic polymeric materials hinders their use in clinical applications. This study was aimed to use the layered structure of Na-montmorillonite (MMT) as a stabilizer for nanomicelles made of poly(d,l-lactide-co-glycolide) (PLGA) amphiphilic polymer. The size of Na-MMT was reduced below 40 nm (nano-MMT) by processing in an attritor prior to its incorporation with PLGA. Hybrid PLGA nano-MMT (PM) nanoparticles (NPs) were prepared using dialysis nanoprecipitation. The size distribution was measured using dynamic light scattering (DLS). Loading 1250 μg of the model drug molecule curcumin to PM (PMC) resulted in obtaining 88 nm-sized particles, suitable for passive targeting of cancer tumors. The structure of nano-MMT and its position in PMC were investigated using FT-IR, differential scanning chalorimetry (DSC), XRF, XRD, ESEM, and EDAX assays, all of which showed the exfoliated structure of nano-MMT incorporated with both hydrophilic and hydrophobic blocks of PLGA. Curcumin was mutually loaded to PLGA and nano-MMT. This firm incorporation caused a serious extension in the release of curcumin from PMC compared to PLGA (PC). Fitting the release profile to different mathematical models showed the remarkable role of nano-MMT in surface modification of PLGA NPs. The ex vivo dynamic model showed the enhanced stability of PMC in simulated blood flow, while cytotoxicity assays showed that nano-MMT does not aggravate the good toxic profile of PLGA but improves the anticancer effect of payload. Nano-MMT could be used as an effective nontoxic stabilizer agent for self-assembled NPs.

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Section: Ee%supporting

confidence: 82%

Enhancing the Kinetic Stability of Polymeric Nanomicelles (PLGA) Using Nano-Montmorillonite for Effective Targeting of Cancer Tumors

et al. 2022

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“…Modification of natural bentonite with a surfactant is an easy method to change the nature of the bentonite surface hydrophilic to hydrophobic [9][10][11]. The negative charge on the surface of the silica layer of bentonite can be attached to the polar compounds and cations in the interlayer of bentonite can be exchanged with organic cations [11][12][13][14]. The structure and texture of nature and organically modified montmorillonite were characterized using various methods, such as XRD, FT-IR, SEM-EDX-mapping and surface area measurements along with the chemical analysis.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Montmorillonite-Cetyl Trimethylammonium Bromide

Siregar¹,

Wijaya²,

Kunarti³

et al. 2017

Asian J. Chem.

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“…Bentonite, among various clay minerals, emerges as a naturally abundant material endowed with the potential for enhanced adsorption capacity through the insertion of organic moieties into its interlaminar spaces [15][16][17]. Nevertheless, the inherent hydrophilicity of raw bentonite restricts its efficacy in adsorbing organic pollutants, including phenols [18]. To surmount this limitation, surfactant modification has arisen as a promising strategy to enhance the adsorption efficiency of bentonite by modifying its surface chemistry and ameliorating its porous structure [9,18,19].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the inherent hydrophilicity of raw bentonite restricts its efficacy in adsorbing organic pollutants, including phenols [18]. To surmount this limitation, surfactant modification has arisen as a promising strategy to enhance the adsorption efficiency of bentonite by modifying its surface chemistry and ameliorating its porous structure [9,18,19]. By introducing organic compounds, the resultant organo-bentonite exhibits enhanced pollutant removal capacities in aquatic environments [18,20,21].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Phenols from Aqueous Solution with A pH-Sensitive Surfactant-Modified Bentonite

Cui,

Liao,

Liu

et al. 2023

Separations

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The presence of organic pollutants in wastewater remains a prominent environmental concern due to the related ecological and health hazards. In response, this study employs an adsorptive methodology to address the removal of phenol and catechol, utilizing an organo-bentonite material modified with a pH-responsive switchable surfactant, dodecyldimethylamine oxide (C12DAO). The synthesized organo-bentonite (C12DAO-Bt) manifests commendable thermostability resulting from thermogravimetric analyses. The adsorption capacities of C12DAO-Bt concerning phenol and catechol intensify with the augmentation of the C12DAO/bentonite mass ratio. The utmost adsorption capacities of 150C12DAO-Bt, deduced through a pseudo-second-order kinetic model, stand at 5.72 mg·g−1 for phenol and 5.55 mg·g−1 for catechol, respectively. Subject to modification by a pH-responsive surfactant, conditions leaning towards weakly acidic and neutral conditions (pH = 6~7) are conducive to the adsorption of phenolic compounds. Conversely, alkaline conditions (pH = 8~9) facilitate the dissociation of adsorbates from adsorbents. The augmentation of cationic strength within the examined scope incites the adsorption procedure while impeding the desorption efficacy. In the case of cationic species with comparable ionic strengths, Na+ exhibited a superior effect on the adsorption–desorption dynamics of phenol, while Ca2+ exerts a more pronounced effect on those of catechol. Moreover, even following five consecutive acid–base regulation cycles, C12DAO-Bt retains a relatively high adsorption capacity and desorption efficacy, which underscores its exceptional regenerative capacity for removing phenolic compounds from wastewater.

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Investigating the expanding behavior and thermal stability of HDPy modified organo-bentonite by X-ray diffraction technique

Cited by 7 publications

References 38 publications

Enhancing the Kinetic Stability of Polymeric Nanomicelles (PLGA) Using Nano-Montmorillonite for Effective Targeting of Cancer Tumors

Enhancing the Kinetic Stability of Polymeric Nanomicelles (PLGA) Using Nano-Montmorillonite for Effective Targeting of Cancer Tumors

Preparation and Characterization of Montmorillonite-Cetyl Trimethylammonium Bromide

Adsorption of Phenols from Aqueous Solution with A pH-Sensitive Surfactant-Modified Bentonite

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