Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : nanocomposite


Optimization of Curing Process for Production of Jatropha Oil Bio-Based Resin Decorated With Nano-Al2O3 and Mechanical Characterization

Agita T. Setiawan; Zurina Z. Abidin; Farah Ezzah Ab Latif; Khalina Abdan

Engineering and Technology Journal, 2023, Volume 41, Issue 3, Pages 1-8
DOI: 10.30684/etj.2022.133859.1209

Concerns on the environment, health and safety issues posed by synthetic resins has amplified numerous efforts of producing resin from various renewable sources. The use of plant oil as potential source of resin has attracted interest from various researchers. Jatropha Oil is a competitive source to petroleum counterparts due to its availability, biodegradability, low eco-toxicity but exhibit poor mechanical properties among many. The objective of this study is to study the effect of adding nanoparticles as reinforcing fillers to bio-based resin from Epoxidized crude Jatropha Oil (ECJO) to improve its mechanical performance. Various loadings of 0% to 4% of Al2O3 nanoparticles was tested on epoxy bio-resin. Later the specimens fabricated were cured and characterized for its mechanical properties. Addition of 1 wt% of Al2O3 nanoparticles improved the tensile strength of a bio-based epoxy resin to tensile stress of 29.37±2.00 MPa, elastic with an elastic modulus of 840.80±124.53 MPa. Further characterization at optimum addition of nano-Al2O3 resulted a glass transition temperature of 37.95˚C. In overall, the inclusion of nano-Al2O3 has definitely improved the mechanical properties of the material which will be useful for further application material engineering.

A Desirability Function for Evaluation of Corrosion Behavior for Nanocoated- Steel Using Electroless Technique

Muroog M. Shinyar; Abbas Kh. Hussein; Laith K. Abbas

Engineering and Technology Journal, 2021, Volume 39, Issue 6, Pages 946-955
DOI: 10.30684/etj.v39i6.2009

The current work is conducting an experimental investigation into the effect of those technical parameters, called nanomaterial, bath temperature and plating time on the micro-hardness and corrosion rate of electroless plated low carbon steel undergoing electroless deposition operation. It was used to prepare (Ni-P/ Nano TiO2), (Ni-P/ Nano Al2O3) and (Ni -P/ Nano SiO2) alloys in this research. The Taguchi design is used to describe the variations located within the corrosion and mechanical properties. To achieve a comprehensive study, a Taguchi-based design was used to account for all applicable combinations of factors. Experimental models had been advanced that linking the response and method parameters to the results of those experiments. Validation of these models is done using analysis of variance (ANOVA). The desirability function is used to simultaneously optimize all the response. Finally, the optimum combination of method parameters resulting (bath temperature=90 oC, plating time =120 min.  and Nanomaterial=(Al2O3)), nanomaterial was observed to be the major process parameter on the responses of the electroless-plated low carbon steel with an impact ratio of (47%) based on the (ANOVA) results. 

Study of the Corrosion Behavior of Zinc-Aluminum Alloy Matrix Composite Reinforced with Nanosilica Produced by Stir Casting

Fatima A. Adnana; Niveen J. Abdul Kader; Mohammed S. Hamza

Engineering and Technology Journal, 2020, Volume 38, Issue 3A, Pages 375-382
DOI: 10.30684/etj.v38i3A.435

In this investigation, Zn-Al alloy metal-matrix nano composites that
reinforced via various weight percentages (2%, 4%, 6%, and 8%) of
nanosilica (SiO2) particles were fabricated applying the technique of stir
casting. Behaviors of the corrosion of the unreinforced alloy and
reinforced composites were measured utilizing a potentiostat test in a (3.5
wt.% NaCl) salt solution. The optical microscopy was employed to
investigate the surface microstructure of the composite. Microstructure
analysis manifested that the uniform distributions of the reinforcing
particles in the composites are alike, consisting of a dendritic structure of
the zinc alloy matrix with an excellent reinforcing particles steady
dispersion. The improved results of the corrosion resistance for the metal
matrix composites showed an excellent resistance to corrosion than the
matrix in the (3.5 wt.% NaCl) solution. Raising the weight percentage of
the reinforcement particulates of nansilica (SiO2) reduced the composites
rate of corrosion

Structure Properties of Graphene- polymer Nanocomposite

Salam H. Ali

Engineering and Technology Journal, 2016, Volume 34, Issue 2, Pages 334-340
DOI: 10.30684/etj.34.2B.17

In this work graphene-PVA composites samples prepared with different graphene loading (0.2, 0.5, 0.7, 1)gm, where prepared by direct mixing then dried at (60 C˚) in an oven. The present work focuses on studying the structural properties of composite, using analysis like X_ray diffraction, SEM and AFM. The results show that the chemical composition has major effect on structural properties, the phase analysis done by X_ray diffraction has confirmed the formation of the expected graphene structure where the crystal size was increased but the X-ray density was decreased when increasing the graphene content in PVA matrix. SEM shows surface image of composite films where the graphene nanoplates can be homogeneously integrated with in PVA matrix. AFM examinationshows that the surface roughness decreased with filler increasing.

Synthesis and Studying SomeMechanical Properties of Nanocomposite

Fadhil A. Chyad; Abdul-Raheem K.Abid Ali; Auday A. Mehatlaf

Engineering and Technology Journal, 2013, Volume 31, Issue 7, Pages 1221-1228
DOI: 10.30684/etj.31.7A1

This study aims to synthesis a nanocomposite from Al2O3 – Cr2O3 and studying some of its mechanical properties like microhardness and fracture strength.
X-Ray diffraction patterns shows a good crystallinity of the composite with very sharp and neat peaks. TEM photographs shows the good distribution of the particles which have an average particle size of (3-6 nm). The microhardness is increased with the increasing of sintering temperatures having the height value at 15% chromia while the fracture strength behaves as a bell shape having again the height value at 15% chromia.