Covalently integrated silica nanoparticles in poly(ethylene glycol)-based acrylate resins: thermomechanical, swelling, and morphological behavior

Nanocomposites integrate functional nanofillers into viscoelastic matrices for electronics, lightweight structural materials, and tissue engineering. Herein, the effect of methacrylate-functionalized (MA-SiO2) and vinyl-functionalized (V-SiO2) silica nanoparticles on the thermal, mechanical,...

Development of Ni/Lahexaaluminates from aluminum saline slags applied as catalysts in the dry reforming of methane

The general objective of this work is to study the synthesis methods, structural and morphological behavior of hexaaluminates and their performance as catalysts in the dry reforming reaction of methane from aluminum salt slags. Specific objectives: 1. Valorize the saline slag of aluminum and mitigate its polluting effect. 2. Obtaining an optimal method for the synthesis of hexaaluminates from salt slags. 3. Evaluation of the performance and applicability of catalysts in the dry reforming reaction. 4. Determination of the optimal operating parameters of the catalysts. 5. Determination of efficiency and comparison with catalysts synthesized with commercial precursors.

Correlation of the structural and morphological property of the formation of ZnO nanoparticles using Ricinus Communis extract as a ligand and synthesized through two different precipitating agents

The present work defines the structural and morphological behavior of ZnO nanoparticles (ZnONP) synthesized via using Ricinus Communis (Castor) extracts. Two precipitating agents (bases) were used to regulate the pH (10), in presence of this natural extract the determination of structural, morphological and functional groups availability was performed to evaluate the enhancement in crystallite size, shape formation and colloidal stability of the nanoparticle.

Impact of Macrodiols on the Morphological Behavior of H12MDI/HDO-Based Polyurethane Elastomer

In this study, we evaluated the morphological behavior of polyurethane elastomers (PUEs) by modifying the soft segment chain length. This was achieved by increasing the soft segment molecular weight (Mn = 400–4000 gmol−1). In this regard, polycaprolactone diol (PCL) was selected as the soft segment, and 4,4′-cyclohexamethylene diisocyanate (H12MDI) and 1,6-hexanediol (HDO) were chosen as the hard segments. The films were prepared by curing polymer on Teflon surfaces. Fourier transform infrared spectroscopy (FTIR) was utilized for functional group identification in the prepared elastomers. FTIR peaks indicated the disappearance of −NCO and −OH groups and the formation of urethane (NHCOO) groups. The morphological behavior of the synthesized polymer samples was also elucidated using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The AFM and SEM results indicated that the extent of microphase separation was enhanced by an increase in the molecular weight of PCL. The phase separation and degree of crystallinity of the soft and hard segments were described using X-ray diffraction (XRD). It was observed that the degree of crystallinity of the synthesized polymers increased with an increase in the soft segment’s chain length. To evaluate hydrophilicity/hydrophobicity, the contact angle was measured. A gradual increase in the contact angle with distilled water and diiodomethane (38.6°–54.9°) test liquids was observed. Moreover, the decrease in surface energy (46.95–24.45 mN/m) was also found to be inconsistent by increasing the molecular weight of polyols.