Journal of Materials Science Research and Reviews <p style="text-align: justify;"><strong>Journal of Materials Science Research and Reviews</strong> aims to publish high-quality papers in all areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, all engineering materials, nanostructured materials, nanocomposites, and biological and biomedical materials. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open access INTERNATIONAL journal.</p> en-US (Journal of Materials Science Research and Reviews) (Journal of Materials Science Research and Reviews) Thu, 06 Aug 2020 10:17:01 +0000 OJS 60 Physical and Morphological Characterization of Cement Particles for Adaptability to Electrostatic Precipitator Control <p>This study characterized the sizes, shape and surface properties of Nigerian cement particles and investigated how the features affect the performance of Electrostatic Precipitator (ESP), a commonly employed particulate control device. Samples of cement powder were collected across existing cement plants in Nigeria and analyzed using standard laboratory methods. The particles have a broad size distribution and the sizes ranged roughly between 10 µm and 100 µm. The mass mean diameter is within 94.8 µm – 95.6 µm indicating that the samples are composed mainly large diameter particles. Regarding shape, the particles of the cement powder have no symmetry but exhibited strong cohesion with one another. The findings of this study have concluded that the physical and structural characteristics of Nigerian cement dust are adaptable to the design and operation of an efficient ESP. Therefore, reasons for the unsatisfactory performance of employed ESP in Nigerian cement manufacturing plants need to be traced to other factors.</p> Jacob Ademola Sonibare, Stephen Ayodele Odewale, Tunde Victor Ojumu, Abiola Ezekiel Taiwo, Abiola Ezekiel Taiwo, Miranda Waldron ##submission.copyrightStatement## Thu, 06 Aug 2020 00:00:00 +0000 Antimicrobial Activities of Co(II) and Sb(III) Complexes of a Schiff Base Derived from S-benzyldithiocarbazate (SBDTC) and Cinnamaldehyde <p>A bidentate Schiff base ligand having nitrogen sulphur donor atoms was derived from the condensation of S-benzyldithiocarbazate (SBDTC) with cinnamaldehyde. The ligand was then chelated with Co(II) and Sb(III). Molecular structures of the Schiff base ligand and its complexes were established through elemental analysis, conductivity and magnetic susceptibility measurements as well as spectroscopic data (FT-IR, UV-Vis and ESI-MS). The geometrical structures are tetrahedral and octahedral for the cobalt complex and antimony complex respectively. The biological activities of the ligand and its complexes were investigated against the gram-positive and gram-negative bacteria and the fungus strain<em>. </em>The metal complexes were shown to possess more.</p> Md. Kudrat-E- Zahan, Md. Faruk Hossen, Rausan Zamir, Md. Ali Asraf ##submission.copyrightStatement## Sat, 08 Aug 2020 00:00:00 +0000 A Comparative Study on the Thermal Behaviour of Natural Rubber Filled with Carbon Black and Plant Residues <p><strong>Aims:</strong> A comparative study on the thermal behavior of natural rubber (NR) filled with different plant wastes and carbon black was carried out with the aim to evaluate green fillers that can replace carbon black filler in natural rubber vulcanisates for thermal applications.</p> <p><strong>Study Design:</strong> The plant wastes used for this study were carbonized and un carbonized cocoa pod husk, corncob and empty palm fruit bunch. Natural rubber vulcanisates filled with 10 phr carbon black (reference) and the various plant waste materials were prepared.</p> <p><strong>Methodology: </strong>The thermal behaviour of the vulcanisates and the fillers was studied by thermogravimetric analysis (TGA).&nbsp; The glass transition temperature (Tg) for the vulcanisates was determined by differential scanning calorimetry (DSC). The shape of the decomposition curve was obtained from the derivative of the TGA curve (DTGA). The amount of residue remaining at various temperatures for the different samples was calculated from the TGA curve. Activation energies of degradation were calculated using Horowitz–Metzger equation.&nbsp;</p> <p><strong>Results:</strong> The carbonised fillers and carbon black were more thermally stable than the un carbonised fillers and raw rubber. The decomposition behavior of vulcanisates followed a similar trend; with a single main decomposition peak at about 380°C. Samples with un carbonised fillers had higher residues than those filled with carbon black and carbonized plant wastes. From the activation energy values, it was found that vulcanisates, filled with carbonized corncob and carbonized cocoa pod husk were very close in thermal stability to those filled with carbon black and they were more stable than those filled with un carbonised plant wastes. DSC studies revealed that the fillers had non-significant effects on the Tg of the vulcanisates. This was evident from the very close nature of the Tg values for the different vulcanisates. Among the plant wastes studied, carbonised cocoa pod husk and corncob presented very close values of Ea and Tg to carbon black as fillers for raw natural rubber.</p> <p>The vulcanisates with un carbonised fillers were less thermally stable than vulcanisates filled with carbonized fillers and carbon black.<strong>&nbsp; </strong></p> Njukeng Jetro Nkengafac, Angel Alegria, Silvia Arrese- Igor, Adolphe Edgengele, Ehabe Eugene ##submission.copyrightStatement## Mon, 10 Aug 2020 00:00:00 +0000