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Item type:Publication, Optimizing the Parameters of Spark Plasma Sintering to Enhance the Hardness of MgO/TiC Composites(Hindawi Limited, 2023-01-01)In this research, the first work was carried out to manufacture MgO-based metal matrix composite containing 3 wt%. Sintering parameters, such as temperature, pressure, and time were subjected to Taguchi analysis to identify the most significant effect on magnesium oxide physical and mechanical characteristics. The impact of each sintering parameter explores using the analysis of variance-structure and microstructure analysis using XRD and EDS-equipped FE-SEM. The mechanical properties of the composite are evaluated by testing its Rockwell hardness (HR) and Vickers hardness (HV). The results showed that sintering temperature was the most influential of the sintering factors on microhardness. Densification at its peak was 100%, while it peaked at 62.19 Rockwell hardness and 58.7 Vickers hardness. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Additive Construction Using Enhanced Earthen-Based Composites: Improvement of the Mechanical Strength and Water Durability Using Chitosan and Agave Fibers(RELX Group (Netherlands), 2023-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Tailoring the Properties of Magnetite/PLA Nanocomposites: A Composition-Dependent Study(Multidisciplinary Digital Publishing Institute (MDPI), 2025)This study focused on composites of magnetite magnetic nanoparticles (MNP) and poly(lactic acid) (PLA) prepared via sonochemical synthesis. The evaluation of MNP loadings (2, 5, 10, 15, and 20 wt.%) provided insights into the structural and reactivity properties of the materials. Methods used included XRD, FT-IR and Raman spectroscopy, SEM and TEM microscopy, textural and thermal analysis (TG and DTA), and magnetic property measurements. The agreement between theoretical and experimental MNP loadings was good. XRD patterns showed predominantly MNP and semicrystalline phases, with a minor maghemite phase detected by FT-Raman and magnetic measurements. FT-IR analysis revealed interactions between MNP and PLA, confirmed by thermal analysis showing higher transition temperatures for the composites (145 °C) compared to pure PLA (139 °C). FT-Raman spectra also indicated that PLA helps prevent iron oxide oxidation, enhancing nanoparticle stability. SEM and TEM micrographs showed well-dispersed, spherical nanoparticles with minimal agglomeration, dependent on MNP loading. The nanocomposites exhibited low N₂ adsorption, resulting in low surface area (~2.1 m²/g) and porosity (~0.03 cm³/g). Magnetic analysis indicated that in the 2MNP/PLA sample, MNP were in a superparamagnetic-like regime at 300 K, suggesting good dispersion of 2 wt.% MNP in the PLA matrix.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Curcumin-Loaded Poloxamer 407 Nanoparticles for Wound Healing Applications: Characterization and Antimicrobial Potential(Springer Science and Business Media Deutschland GmbH, 2025)Curcumin offers a promising potential for wound healing applications due to its pharmacological properties, such as antibacterial, antioxidant, and anti-inflammatory activities. This article presents the synthesis of curcumin-loaded poloxamer nanoparticles (CurP-NPs) as a potential drug delivery system for wound healing to circumvent the limitations of curcumin’s clinical utility, such as water insolubility and poor bioavailability. Curcumin and poloxamer concentrations were optimized for CurP-NPs formulation by measuring particle size, polydispersity, and zeta potential. The morphology of CurP-NPs was studied with scanning electron microscopy (SEM). The comparative studies on the antioxidant activity of lyophilized curcumin powder and CurP-NPs were carried out by ABTS cationic radical decolorization assay. Furthermore, the qualitative study of antibacterial activity was carried out by bioautography analysis against the large positive bacteria Staphylococcus aureus. The results showed that the optimal concentration of CurP-NPs was 1.33 g/L, with the smallest size of 95.37 ± 9.2 nm and a PDI of 0.28. In addition, greater antioxidant activity was observed (54%) compared to other concentrations evaluated. Ultimately, CurP-NPs showed an inhibition zone of 1.08 mm, indicating significant antimicrobial potential.2 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Triboelectric Nanogenerators Based on Ulvan Biopolymer: Impact of Lithium Sulfate Doping on Electrical Output(John Wiley and Sons, 2025)The increasing demand for sustainable energy solutions has driven extensive research into energy harvesting devices, such as triboelectric nanogenerators (TENGs). Although various additives, including nanowires and salts, have been investigated to enhance the performance of biopolymer-based TENGs, the use of lithium salts in green algae-based TENGs remains unexplored. Herein, a series of TENGs are fabricated using ulvan, a biopolymer derived from the green algae Ulva nematoidea. To improve the output performance of these TENGs, the ulvan matrix is doped with lithium sulfate (Li2SO4) at concentrations of 0%, 10%, 20%, 30%, 40%, and 50% by weight. Dielectric permittivity measurements are conducted to calculate the surface charge density. The results show an increase from 0.94 nC cm−2 for the pristine film to 1.14 nC cm−2 at 30 wt% Li2SO4, beyond which further increases in salt concentration lead to a decrease in charge density. The incorporation of salts significantly enhances the electrical performance, with the 20% Li2SO4/ulvan device achieving a maximum power density of 0.156 W m−2, representing an 85.7% improvement compared to the pristine ulvan TENG. The open-circuit voltage (Voc) and short-circuit current also increase with salt concentration, with Voc reaching 87.71 V at 30% Li2SO4.1