International Research Journal of Materials Sciences and Applications


Characterization and Cu(II) adsorption properties of activated carbons prepared from cotton stalk by one-step H3PO4 activation.

Research Article of International Research Journal of Materials Sciences and Applications Characterization and Cu(II) adsorption properties of activated carbons prepared from cotton stalk by one-step H3PO4 activation. Pierre Gerard TCHIETA, NKANA NKANA Gilbert Romeo, Charles Melea KEDE* Bio-organic, Analytical and Structural Chemistry Laboratory, Faculty of Science, University of Douala; BP 24157 Douala, Cameroon In the present study adsorption of copper (II) ions from aqueous solution by activated carbon was produced from cotton stalks husk via thermal pretreatment preceding chemical modification with phosphoric acid was investigated under batch mode. The biosorbent was characterized by thermo-gravimetric analysis, Fourier transform infrared (FT-IR) and iodine number. The influence of copper concentration, contact time, and temperature was studied. Sorption equilibrium time was observed in 30 min. The equilibrium adsorption data were correlated with Freundlich and Langmuir adsorption isotherm models. The kinetics of the adsorption process was tested by pseudo- first-order, pseudo-second order and Intra-particle diffusion. It was shown that adsorption of copper could be described by the pseudo-second order kinetic model. Thermodynamic parameters such as Gibbs free energy (∆G0), the enthalpy (∆H0) and the entropy change of sorption (∆S0) have also been evaluated and it has been found that the adsorption process was spontaneous, feasible and endothermic in nature. The results indicated that Activated carbon was produced from cotton stalks husk can be used as an effective and low-cost adsorbent to remove copper (II) from aqueous solution. Keywords:Heavy metals, adsorption, isotherms, kinetics, thermodynamics ...

Optimizing the Surface Quality of Textile Composites for Bonded Repairs

Research Article of International Research Journal of Materials Sciences and Applications Optimizing the Surface Quality of Textile Composites for Bonded Repairs Riddhi Naik and Sunil Joshi Department of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. With the accelerated use of woven composites in many industries like aerospace, marine, sports, construction, automobile and many more their repairs have become an inevitable part of it. The current problem with repairs is, even with precise machining there are bond failures due to inadequate surface quality. In this research, machining techniques like stepped and scarf repairs and abrasion techniques are used on the woven coupons to evaluate their influence on the surface characteristics. Preliminary evaluation of the surface characteristics is done using a surface profiler, to measure the topographical features like surface roughness and amplitude of the peaks and valleys. Further, the results obtained from the profiler are validated using microscopy and contact angle test to identify the trend between surface roughness and wettability. Finally, the results obtained from the various experiments helps us to identify an optimum surface quality needed prior to bonding in terms of surface roughness and contact angle. The results for 3K woven glass fibre shows an optimum surface roughness in the range of 2-4 µm and contact angle below 60˚ Keywords: Surface modification; Surface quality, Microscopy, Surface roughness Ra and Arithmetic mean roughness Rz ...

Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System

Research Article of International Research Journal of Materials Sciences and Applications Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System A. F. Ferreiraa,*, M. A. Oliveira a, D.M. Silva a, M.M.V. Valentea, J.J. Passos and A.R.B. Costa a a Graduate Program on Metallurgical Engineering, Universidade Federal Fluminense, 27255-125, Volta Redonda, Brazil. The phase-field model was applied to simulate the solidification kinetics to undercooled Al-Cu alloy. The relationships between material properties and model parameters are presented. The diffusivity of solute in the solid region and liquid and liquidus temperature are calculated during the simulation of solidification process. As an example, the two-dimensional computations for the dendritic growth in Al–Cu binary alloy have been performed. The dendritic morphology calculated by phase-field model showed features that are commonly found in experiments on the solidification. The concentration profiles of solute calculated in the solid region and liquid are not completely horizontal, showing evidence of microsegregation. The velocity of the dendrite tip and solute concentration at the interface front are calculated. It is found that the tip velocity is greatly concentration dependent around interface. In order to validate the growth kinetics predicted by this model tests have been performed for comparison with Stefanescu’s model. The present work based results show good agreement with those obtained by Stefanescu. The dependence of growth velocity on the initial concentration and super-cooling are also demonstrated. Keywords: Solidification; Undercooling; Kinetics; Phase-field model; Al-Cu ...

Enhancing the liquid phase exfoliation of graphite in both aqueous and organic mixtures

Research Article of International Research Journal of Materials Sciences and Applications Enhancing the liquid phase exfoliation of graphite in both aqueous and organic mixtures a,* M.P. Lavin-Lopez, a J.L. Valverde, a L.M. Dominguez-Delgado, a L. Sanchez-Silva and a A. Romero a Department of Chemical Engineering, University of Castilla-La Mancha, Avenida Camilo José Cela 12, Ciudad Real, Spain, 13071 Two different solvent mixtures, aqueous and organic, were used in the graphite liquid phase exfoliation. These solvent mixtures were selected through a detailed study of Hansen Solubility Parameters. Different operational sonication parameters (sonication temperature, cycle, amplitude and time) were studied in order to analyze their influence over the exfoliation process. Exfoliated graphite obtained after different sonication conditions were further characterized by RAMAN spectroscopy and thermogravimetric techniques. Obtained results showed that, among all the studied sonication parameters, time is the most important one due to its influence over characteristics of the final exfoliated product. Thus, it was evidenced the defect formation at higher sonication times, being dominant the growth of bulk defects in the structure of exfoliated samples at sonication times superior to 5 hours. As consequence, a careful tuning of the sonication parameters is necessary in order to obtain exfoliated samples with low disorder. Keywords: Graphite, exfoliation, Hansen Solubility Parameters, aqueous solvents, organic solvent ...

Prof.dr.ir. Gustaaf Schoukens
Professor, Ghent University (Belgium), faculty of Engineering

Dr. Azeez Abdullah Barzinjy
PhD (Materials Science), Department of Physics, College of Education, Salahaddin University –Erbil

Dr. Sujith Kalluri
Research Scientist, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, South Korea.

Dr. Nupur Saxena
CSIR-Senior Research Associate, Department of Physics and Astronomical Sciences, Central University of Jammu

Dr. Harish Mudila
Asst. Professor, Dept. of Chemistry, Faculty of Technology and Sciences, Lovely Professional University

Dr. Anil Kumar
Assistant Professor, Department of Chemistry, Lovely Professional University

Dr. Praveen Kumar Sharma
Associate Professor, Department of Chemistry, Lovely Professional University

Dr. HASAN DİLBAS
Yildiz Technical University Civil Engineering Faculty Civil Engineering

Dr. Rasha Samir Mohamed Kamal
Professor researcher associated, Egyptian Petroleum Research Institute

Dr. Mohammad Hadi Dehghani
Professor, Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Dr. Jesús Ma. Rincón
Professor, “Colaborador Honorífico”- UMH (Dept. Agroquímicaía y Medio Ambiente)

Dr. Walid Mohamed Rashad Daoush
Professor, Material Science and Technology , Production Technology Department Head, Faculty of Industrial Education, Helwan University

Dr. Soumya Mukherjee
Assistant Professor, Amity School of Engineering and Technology, Amity University

Dr. Klodian Dhoska
Lecturer at Engineering School, Canadian Institute of Technology, Zayed Center, Rr. Andon Zako Çajupi,Tirana, Albania

Dr. Himanshu Kapoor
Assistant Professor, Department of Chemistry, Lovely Professional University

Dr. Keyur D. Bhatt
Head, Department of Chemistry, Mehsana Urban Institute of Science, Ganpat University

Dr. PREETA DATTA
Senior Engineer, Core Innovation, Sealed Air Corporation, USA.

Manuscript Title: The title should be a brief phrase.

Author Information: List full names and affiliation of all authors, including Emails and phone numbers of corresponding author.

Abstract: The abstract should be less than 500 words. Following abstract, a list of keywords and abbreviations should be added. The keywords should be no more than 10. Abbreviation are only used for non standard and long terms.

Introduction: The introduction should included a clear statement of current problems.

Materials and Methods: This section should be clearly described.

Results and discussion: Authors may put results and discussion into a single section or show them separately.

Acknowledgement: This section includes a brief acknowledgment of people, grant details, funds

References: References should be listed in a numbered citation order at the end of the manuscript. DOIs and links to referenced articles should be added if available. Abstracts and talks for conferences or papers not yet accepted should not be cited. Examples Published Papers: 

1. Avinaba Mukherjee, Sourav Sikdar, Anisur Rahman Khuda-Bukhsh. Evaluation of ameliorative potential of isolated flavonol fractions from Thuja occidentalis in lung cancer cells and in Benzo(a) pyrene induced lung toxicity in mice. International Journal of Traditional and Complementary Medicine, 2016; 1(1): 0001-0013. 
2. Vikas Gupta, Parveen Bansal, Junaid Niazi, Kamlesh Kohli, Pankaj Ghaiye. Anti-anxiety Activity of Citrus paradisi var. duncan Extracts in Swiss Albino Mice-A Preclinical Study. Journal of Herbal Medicine Research, 2016; 1(1): 0001-0006.

Tables and figures: Tables should be used at a minimum with a short descriptive title. The preferred file formats for Figures/Graphics are GIF, TIFF, JPEG or PowerPoint.

Proofreading and Publication: A proof will be sent to the corresponding author before publication. Authors should carefully read the proof to avoid any errors and return the proof to the editorial office. Editorial office will publish the article shortly and send a notice to authors with the links of the paper.

Open Access

International Research Journal of Materials Sciences and Applications (ISSN:2575-1034;doi:10.28933/irjmsa) is a peer reviewed open access journal publishing research manuscripts, review articles, editorials, letters to the editor in Materials Sciences and Applications.

Peer Review

To ensure the quality of the publications, all submitted manuscripts will be peer-reviewed by invited experts in the field. The decisions of editors will be made based on the comments of the reviewers.

Rapid Publication

Time to first decision: within 2 days for initial decision without review, 18 days with review; Time to publication: Accepted articles will be published online within 2 days, and final corrected versions by authors will be accessible within 5 days.  More details....

Rapid Response Team

Please feel free to contact our rapid response team if you have any questions. Our customer representative will answer you shortly.

International Research Journal of Materials Sciences and Applications

Upload

Note: Please compress all documents (manuscript, cover letter et al.,.) into one .Zip file and then upload the Zip file.