New insights into physicochemical aspects involved in the formation of chitosan@alginate biobased polyelectrolyte complexes on natural montmorillonite clay surface

BRAHMI, Mohamed; ESSIFI, Kamal; BAKIRHAN, Nurgul Karadas; EL BACHIRI, Ali; OULDRIANE, Sandrine DELPEUX; TAHANI, Abdesselam

doi:10.1016/j.molliq.2023.122635

Cited by 10 publications

(3 citation statements)

References 53 publications

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“…With a higher amount of the DMSO, agitation did not have a significant effect, as there were many molecules reacting on the inner surface, increasing the interlayer space. This event occurred because the interaction between DMSO molecules and Mt layers can occur in three distinct spaces: (a) on the outer edges, (b) on the edges, and (c) on the inner surface [50,51]. Thus, as more DMSO molecules are available for interaction and the higher the system temperature, there is less selectivity in the interaction and, consequently, the DMSO molecules interact more at the edges of the Mt layers, reducing the interlayer space.…”

Section: Parametersmentioning

confidence: 99%

New Methodology for Modifying Sodium Montmorillonite Using DMSO and Ethyl Alcohol

Stoski,

Machado,

Vilsinski

et al. 2024

Materials

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Modified clays with organic molecules have many applications, such as the adsorption of pollutants, catalysts, and drug delivery systems. Different methodologies for intercalating these structures with organic moieties can be found in the literature with many purposes. In this paper, a new methodology of modifying Sodium Montmorillonite clays (Na-Mt) with a faster drying time was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), BET, and thermogravimetric analysis (TG and DTG). In the modification process, a mixture of ethyl alcohol, DMSO, and Na-Mt were kept under magnetic stirring for one hour. Statistical analysis was applied to evaluate the effects of the amount of DMSO, temperature, and sonication time on the modified clay (DMSO-SMAT) using a 23-factorial design. XRD and FTIR analyses showed the DMSO intercalation into sodium montmorillonite Argel-T (SMAT). An average increase of 0.57 nm for the interplanar distance was found after swelling with DMSO intercalation. BET analysis revealed a decrease in the surface area (from 41.8933 m2/g to 2.1572 m2/g) of Na-Mt when modified with DMSO. The porosity increased from 1.74 (SMAT) to 1.87 nm (DMSO-SMAT) after the application of the methodology. Thermal analysis showed a thermal stability for the DMSO-SMAT material, and this was used to calculate the DMSO-SMAT formula of Na[Al5Mg]Si12O30(OH)6 · 0.54 DMSO. Statistical analysis showed that only the effect of the amount of DMSO was significant for increasing the interlayer space of DMSO-SMAT. In addition, at room temperature, the drying time of the sample using this methodology was 30 min.

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Section: Parametersmentioning

confidence: 99%

New Methodology for Modifying Sodium Montmorillonite Using DMSO and Ethyl Alcohol

Stoski,

Machado,

Vilsinski

et al. 2024

Materials

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“…Additionally, the use of alginate-chitosan polyelectrolyte complexes incorporating montmorillonite to enhance encapsulation efficiency and interaction properties with contaminants has been explored [89]. Inorganic materials such as halloysite and graphene have been utilized in networks of polyelectrolyte complexes [90].…”

Section: Applications In Contaminated Soilsmentioning

confidence: 99%

Polyelectrolytes for Environmental, Agricultural, and Medical Applications

Delgado,

Aranda,

Hernandez-Tenorio

et al. 2024

Polymers

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In recent decades, polyelectrolytes (PELs) have attracted significant interest owing to a surge in research dedicated to the development of new technologies and applications at the biological level. Polyelectrolytes are macromolecules of which a substantial portion of the constituent units contains ionizable or ionic groups. These macromolecules demonstrate varied behaviors across different pH ranges, ionic strengths, and concentrations, making them fascinating subjects within the scientific community. The aim of this review is to present a comprehensive survey of the progress in the application studies of polyelectrolytes and their derivatives in various fields that are vital for the advancement, conservation, and technological progress of the planet, including agriculture, environmental science, and medicine. Through this bibliographic review, we seek to highlight the significance of these materials and their extensive range of applications in modern times.

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“…Clay adds increased mechanical strength and structural stability, while chitosan, which is made from chitin, offers biodegradability and biocompatibility. The resulting nanocomposite has enormous potential for use in a variety of fields, including biomedicine, environmental remediation, and other fields [15,[26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Establishing the Link across the Synthesis Reaction Kinetics, Structural Changes, and Photocatalytic Efficiency of an Enhanced Chitosan–Clay (1:3) Nanocomposite

Albouchi,

Lahbib,

Mejri

et al. 2024

Solids

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This research investigates the influence of synthesis kinetics on the structural and photocatalytic properties of chitosan–clay nanocomposites (Cs/MMT) and chitosan–hectorite nanocomposites (Cs/HET), employing an optimized initial stoichiometry of 1:3. Utilizing a variety of analytical techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FTIR), the study explores the structural evolution of the nanocomposites and their photocatalytic performance using semiconductor catalysts TiO2 and ZnO. The findings emphasize the significant impact of reaction kinetics, particularly after 3 h of reaction time, on the structural features of the nanocomposites. Notably, Cs/MMT demonstrates greater crystalline stability compared to Cs/HET due to variations in octahedral cavity occupancy in the initial clays. FTIR and TEM analyses depict the progressive evolution of the nanocomposites during the reaction, shedding light on how reaction kinetics drive the formation of specific bonds within the nanocomposites. In terms of photocatalytic activity, this study provides insights into the complex dynamics of photocatalytic degradation, with a specific focus on the performance of TiO2 and ZnO under diverse experimental conditions. The superior efficacy of TiO2 as a catalyst, particularly when integrated with Cs/MMT nanocomposites, is unequivocally demonstrated, with degradation rates exceeding 80%. This preference stems from TiO2 consistently exhibiting higher degradation rates compared to ZnO, attributed to structural disparities between montmorillonite and hectorite, influencing catalyst–support interactions. The findings underscore the critical importance of selecting suitable catalyst and support matrix combinations for optimizing performance in specific applications.

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New insights into physicochemical aspects involved in the formation of chitosan@alginate biobased polyelectrolyte complexes on natural montmorillonite clay surface

Cited by 10 publications

References 53 publications

New Methodology for Modifying Sodium Montmorillonite Using DMSO and Ethyl Alcohol

New Methodology for Modifying Sodium Montmorillonite Using DMSO and Ethyl Alcohol

Polyelectrolytes for Environmental, Agricultural, and Medical Applications

Establishing the Link across the Synthesis Reaction Kinetics, Structural Changes, and Photocatalytic Efficiency of an Enhanced Chitosan–Clay (1:3) Nanocomposite

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