Journal of Materials Science and Chemical Engineering

Journal Information
ISSN / EISSN : 2327-6045 / 2327-6053
Current Publisher: Scientific Research Publishing, Inc. (10.4236)
Total articles ≅ 582
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SHERPA/ROMEO
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Latest articles in this journal

Su Qinglin, Zhang Lin, Liang Yi, Liu Yan, Liu Peng, Zhang Jiandong, Qinglin Su, Lin Zhang, Yi Liang, Yan Liu, et al.
Journal of Materials Science and Chemical Engineering, Volume 8, pp 46-52; doi:10.4236/msce.2020.88005

Abstract:
Cuprous oxide (Cu2O) in high yield with controlled shape and size was synthesized via a solution-phase route by reducing cupric sulphate with D-glucose. The solution pH shows strong effects on the size and morphology of the products. The products were characterized by X-ray power diffraction (XRD) and Scanning electron microscope (SEM). The infrared emissivity of Cu2O was tested by Far infrared emissivity measurer S302. The possible crystal growth processes have been proposed.
Benedict U. Ugi, Victoria M. Bassey, Mbang E. Obeten, Stephen A. Adalikwu, Desmond O. Nandi
Journal of Materials Science and Chemical Engineering, Volume 8, pp 38-60; doi:10.4236/msce.2020.85004

Abstract:
Investigation into the Inhibition of pitting corrosion in mild steel around heavy salt deposits by some selected secondary plant metabolites—alkaloid extract (AESML), saponin extract (SESML and flavonoid extract (FESML) of natural product origin—Strongylodon macrobotrys was successfully completed with the aid of electrochemical impedance spectroscopy, potentiodynamic polarization, gravimetric and gasometric experimentation. The research proved that the selected secondary plant metabolites were excellent inhibitors of mild steel in the salt water environment as inhibition efficiency was recorded at 99.2%, 92.6% and 84.7% for AESML, SESML and FESML. The inhibitors showed higher inhibition at lower temperature due to frequent scale redeposition from agitation in temperature rise and loss in collision of the molecules. The potentiodynamic polarization result confirmed the reduction in the loss of electrons at the anode by the inhibitors that would have trigger oxidation reaction that causes the anode to corrode. Charge transfer resistance reflected the maximum inhibition efficiency obtained for mild steel at maximum concentration and the decrease in double layer capacitance is due to the decrease of the area where electrolyte is present due to the formation of inhibitor film. Thermodynamic investigation shows that the inhibitor has the potential of increasing the energy of the intermediate, reducing both the number of collisions, and number of particles that have enough energy to react and also number of corrosion reaction particles with the correct orientation. The adsorption isotherm consideration shows physical adsorption mechanism with binding constant increasing with increasing temperature.
Mahbubur Rahman, Asim Bhowmik, Sudipta Das, Kartick Chowhan, Tanmoy Biswas
Journal of Materials Science and Chemical Engineering, Volume 8, pp 30-40; doi:10.4236/msce.2020.88003

Abstract:
The main objective of this work is to degum the silk with natural enzyme in lieu of conventional degumming to make it sustainable. Fibroin and sericin are the main composition of silk. Sericin provides a harsh and stiff effect of silk and decreases the valuable property like luster and whiteness and also leads to uneven dyeing. It is necessary to remove this sericin for the better post processing of silk. The removal process of sericin from silk is called degumming. Usually degumming process is done by using chemicals like soda (Na2CO3), detergent and other chemical staffs. But these chemicals are lethal to the environment. So, if such component found that can be substitute the fatal components and give the same required result or very close then that would be considered as an asset. This work deals with the different enzymes extracted from natural sources such as papaya skin, pineapple skin and guava leaf with variation of enzyme concentrations such as 10 (%), 15 (%) & 20 (%) as well as 35°C 45°C & 55°C temperatures that influence the degumming efficiency. By analyzing the various samples on the basis of degumming efficiency and other tests such as tensile strength, water vapor permeability, pilling and abrasion, crease recovery, whiteness test and spot test are done by standard method, it is found that the enzyme extracted from papaya skin shows the best degumming efficiency 15.9 (%) and other tests also show the good result at 15 (%) concentration and 45°C temperature whereas degumming efficiency 16.6 (%) for conventional process. From this work, it can be concluded that enzyme extracted from papaya skin can be substituted of conventional degumming which is also ecofriendly.
Nilce Ortiz, Lucia Nascimento, Fernanda Maichin, Izabela Rodrigues Cerqueira Lima Azevedo, Marília Guerino Vieira
Journal of Materials Science and Chemical Engineering, Volume 8, pp 12-26; doi:10.4236/msce.2020.87002

Abstract:
The detection of the pharmaceutical compounds used in human and veterinary medicine is in several environmental matrices (surface waters, effluents, groundwater, soils, and sediments), and such presence promotes the resistance bacteria development, making them ineffective in some diseases treatment. The research project promotes the TiO2 synthesis using yeast culture as biotemplate, the step followed by the microstructure characterization with surface area enhancement; such properties are responsible for the improvement of solar photodecomposition processes of the veterinary antibiotic oxytetracycline. In such simple and standard process conditions the system reaches about 84% of removal percentage with a better agreement with the pseudo-first-order with the Pearson coefficient in the range from 0.82 to 0.94 and K1 = 0.035 M−1∙s−1. The degradation rate constant increased with the increasing initial Yeast-TiO2 dosage until the maximum mass of 0.1 g or with the decreasing of initial oxytetracycline concentration. The solar light used as a sustainable irradiation source is abundant and low cost in tropical countries, perfect to be applied in water treatment to decompose the pharmaceuticals pollutants, as the veterinarian antibiotics. The study demonstrates that solar photodecomposition is an efficient treatment technology for the removal of antibiotics from polluted water and provides insightful information on the potential practical application of this technology to treat contaminated water, possibly also in rural, distant areas.
Natacha Rostomov, William Judge, George Jarjoura
Journal of Materials Science and Chemical Engineering, Volume 8, pp 42-49; doi:10.4236/msce.2020.810005

Abstract:
Powder metallurgy (PM) is a very interesting metal manufacturing technique in the production of automotive components of a net or near net shape. In this research, the electrochemical corrosion behavior of a commercially available aluminum powder alloy known as Alumix 321 was investigated and compared to wrought alloy AA6061 in 3.5 wt% NaCl solution using Electrochemical Impedance Spectroscopy Measurements (EIS). Alumix 321 alloy samples were prepared by pressing the powder at pressures ranging from 50 to 500 MPa and subsequently sintering them for 30 min at 630°C. It was found that the presence of pores and their morphology strongly affect the corrosion behavior the PM samples.
Marius Behnecke, Svea Petersen
Journal of Materials Science and Chemical Engineering, Volume 8, pp 32-41; doi:10.4236/msce.2020.810004

Abstract:
In order to enhance promising properties of polyethertherketone (PEEK) for biomedical application, we evaluate two different strategies for the provision of PEEK with a drug delivery system at the example of the model drug chlorhexidine diacetate. On one hand we discuss the deposition of a biodegradable polymeric drug-release coating, based on well-established poly(L-lactide) (PLLA), on PEEK and on the other hand the modification of PEEK via sulfonation and its subsequent drug loading. Results are compared to pure PLLA-associated drug delivery systems and limits and perspectives are shown.
Atsuhiro Ichinose, Kazuki Kuwata, Takehiro Esaki, Takayuki Matsuda, Noriyuki Kobayashi
Journal of Materials Science and Chemical Engineering, Volume 8, pp 33-42; doi:10.4236/msce.2020.811003

Valeriya P. Prigara, Aleksandr N. Kupriyanov, Vladimir V. Ovcharov
Journal of Materials Science and Chemical Engineering, Volume 8, pp 54-65; doi:10.4236/msce.2020.81006

Abstract:
The effect of a quartz plate (window) on the silicon wafer temperature is studied in the conditions of the combined thermal transfer in a lamp-based chamber for the rapid thermal treatment (RTP) set up. The chamber for RTP is simulated by a radiative-closed thermal system including the influence of quartz window as a spectral filter of lamp emission and a source of emitted thermal radiation. Energy equations for thermal fluxes involved in the heat input and output from the working wafer and quartz window are solved in spectral approximation. The transfer characteristics that are defined by the temperature dependencies of the silicon wafer and the quartz window on the temperature of the heater are accounted. It is shown that temperature bistability in the silicon wafer initiates an induced bistability into the quartz window that does not reveal bistable behavior because of the linear temperature dependence of its total optical characteristics. A possibility for simulation of the quartz window by spectral restriction of the heater radiation is confirmed. The availability of the weak bistable effect in the mode of zero effective heat exchange coefficient of a non-radiative component of the thermal flux removed from the working wafer has been obtained.
Michiya Ota, Kazunari Arai, Ayano Kuribara, Yonekazu Deguchi, Kota Onozuka
Journal of Materials Science and Chemical Engineering, Volume 8, pp 1-6; doi:10.4236/msce.2020.82001

Abstract:
To increase the capacity of the negative electrode for lithium-ion secondary batteries, we prepared Si-containing carbon microspheres. The target compound was obtained by thermal decomposition of hexaphenyldisilane embedded in porous carbon particles that contained Si-nanoparticles characterized by various methods. When charging/discharging characteristics were evaluated using a cell having the obtained material as a negative electrode, a remarkable improvement in charging characteristics was observed.
Liao Yuyun, Yuyun Liao
Journal of Materials Science and Chemical Engineering, Volume 8, pp 79-90; doi:10.4236/msce.2020.84006

Abstract:
This paper combined with the actual case of flue gas desulfurization (FGD) system in cement Plant, analyzes the corrosion environment in each area of the FGD system, and selects appropriate anticorrosive materials for different corrosion environment, so as to provide operating experience and reference for the safe, stable and efficient operation of the FGD system.
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