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    WEAR RESISTANCE PROPERTIES OF EPOXY ALUMINIUM MICROPARTICLE COMPOSITE
    (Proceedings on Engineering Sciences, University of Kragujevac, 2019) Sefiu Adekunle BELLO; Johnson Olumuyiwa AGUNSOYE; Jeleel Adekunle ADEBISI; Nasirudeen Kolawole RAJI; Suleiman Bolaji HASSAN
    Present priority of light materials for enhancing automobile safety and fuel efficiency creates a premise for developing new materials with optimum combination of lightness and better or comparative properties to replace existing heavy alloys for transportation applications. Previous authors’ study reveals development of epoxy aluminium composite with investigation of mechanical properties and its targeted application as an automobile bumper but the wear resistance of the composite has not been reported. This study investigates wear resistance properties of epoxy containing 10% by weight of aluminium microparticles. The composite was produced from epoxy resin (MAX 1618 A) cured with hardener (MAX 1618 B) at 2:1 volume mix ratio through in-situ polymerisation. Firstly, wear rates (volume loss per unit time) were measured as a function of the applied load. Then, the wear rates (mass loss per sliding distance) were examined as a function of the applied load, velocity and % weight of aluminium particles. Worn-out surfaces of examined samples were tracked morphologically. Result obtained indicated that the applied load, sliding speed and percentage by weight are all significant factors influencing the wear resistance of the epoxy composites with the model, P value of 0.049≤0.05. The sliding velocity of β value = 0.011 contributed to increase in the wear rate than the applied load having lower β value (0.001). Addition of aluminium particles (β value = -0.003) to the epoxy lowered the wear rate. This implies that an increase in the wt% of aluminium particle added to the epoxy enhances the wear resistance of the composites. SEM study affirms the wear mechanism by crack nucleation which is characterised with continual propagation, deflection and pining. A greater damage observed on the surface of epoxy polymer justifies its higher wear rates in comparison with those of the composite.
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    Electronics, optical, and thermal management applications of nanocomposites in aeronautics
    (Elsevier, 2023) Sefiu Adekunle Bello; Stephen Durowaye; Maruf Yinka Kolawole
    Nanocomposites are rapidly growing desirable materials of the present dispensation because of their unique characteristics. They find application in the aeronautic sector and other fields. The choice or selection of the materials (nanofillers and matrices) that make up the nanocomposites is very important for obtaining the desired results. For aeronautic applications, attention has been focused on materials that exhibit superlative mechanical and thermal characteristics. Equally important are electrical, optical, electronics, chemical, and biodegradability characteristics. Polymeric nanocomposites containing nanoparticles (carbon nanotubes, layered silicates, etc.), which are dispersed in polymer matrices have attracted much attention. This is due to the superlative properties exhibited by nanoparticles. Nanocomposites have several major capabilities, some of which are high strength, ability to resist fatigue, corrosion-resistance, design flexibility, thermal stability, thermal conductivity, lower assembly costs, and lightweight components with no compromise on reliability. Application of nanocomposite materials for aeronautic purposes is increasing because of the advantages that nanocomposites have over metals. Furthermore, the achievements recorded in the aviation industry are attributable to the application of nanocomposites. Hence, this chapter focuses on nanocomposites, their manufacturing methods, and aeronautic applications with emphasis on the characteristics of the polymeric nanocomposites.
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    Flexural Performances of Epoxy Aluminium Particulate
    (2018) Bello Sefiu Adekunle; Agunsoye Johnson Olumuyiwa; Adebisi Jeleel Adekunle; Raji Nasirudeen Kolawole; Adeyemo Raphael Gboyega; Alabi Abdul Ganiyu Funsho; Hassan Suleiman Bolaji
    Polymers are characterised with lightness, ease of formability and resistance to chemical attack but their modulus and strength are low. Epoxy was reinforced with aluminium particles of different sizes. Bond, functional group and chemical formulae of the composite phases were examined using Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffractometer. The flexural test was also conducted on the developed composites via three-point method. Analysis of variance (ANOVA) was performed using aluminium percentage by weight (wt%) and sizes (Ps) as the predictor variables. Results indicated different chemical formulae of the composite phases. A maximum of 124.44 % increase in flexural modulus was found at 12 wt% reinforcement addition. Probability value, 0.000 for each of wt% and Ps affirm evenly significant influence of both variables on flexural modulus of the composites. Hence, the developed multiple regression model can be used for predicting the flexural modulus of epoxy particulate composites within and outside the scope of experiment.
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    Sustainable Materials from Wastes for Engineering Applications
    (Nigerian Institution of Metallurgical, Mining and Materials Engineers, 2025) Bello Sefiu Adekunle; Alabi Abdul Ganiyu Funsho; Balogun Sunday Wilson; Adebayo, Mohammed Kayode; Daudu, Suleiman Danjuman; Akintola Aisha Mayowa
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    Recycled Plastics and Nanoparticles for Green Production of Nanostructural Materials
    (2026) Bello Sefiu Adekunle; Kolawole Maruf Yinka; Alabi Abdul Ganiyu Funsho; Adebayo Mohammed Kayode