Browsing by Author "Suleiman Bolaji Hassan"

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    Effects of Applied Loads and Aluminium Nanoparticle Additions on Wear Resistance Properties of Particle Reinforced Epoxy Nanocomposites
    (2023) Sefiu Adekunle Bello; Maruf Yinka Kolawole; Sunday Wilson Balogun; Johnson Olumuyiwa Agunsoye; Suleiman Bolaji Hassan
    The recent technology advancement has emerged aluminium nanoparticles for polymer reinforcements. Mechanical properties of epoxy containing aluminium nanoparticle was reported but its wear resistance is left unstudied. This study has been focused on effect of aluminium nanoparticle reinforced epoxy under different applied loads and velocities. It is obtained that the wear resistance increases with the applied loads but decreases with the percentages by weight of aluminium nanoparticle additions to epoxy. The wear rates recorded with aluminium nanoparticle reinforced epoxy are 81.2% and 82% smaller than those of the unreinforced epoxy and greater than 75.5 and 76.1% reductions noticed with the aluminium microparticle reinforced epoxy under applied loads of 9 and 25 N already reported in literature. Greater percentage reductions in the wear rates affirms aluminium nanoparticle as better reinforcement with improved wear resistance than its aluminium microparticle counterparts. Fishers’ value, 7.389 and prob, 0.042<0.05 affirms that the linear response surface model is significant in evaluating the wear resistance of the aluminium nanoparticle reinforced epoxy with 84.7% predictability while the remnants accounts for the residuals.
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    Wear resistance properties of particles‑reinforced epoxy nanocomposites using historical data response surface models
    (Springer, 2023-08-30) Sefiu Adekunle Bello; Raphael Gboyega Adeyemo; Abdul Ganiyu Funsho Alabi; Maruf Yinka Kolawole; Sadam Oniwa; Azim Bayonle Kareem; Muizz Oyeleye Azeez; Bunmi Bisola Olaiya; Tosin Adewale Salami; Sofiu Oladimeji Abdulkareem; Quamdeen Aremu Lawal; Kabir Omoniyi Mohammad; Peter Akinola Akindahunsi; Johnson Olumuyiwa Agunsoye; Suleiman Bolaji Hassan
    Knowledge of wear resistance properties of newly emerging materials as complements to their mechanical properties is important to broaden their applications. This study focuses on wear resistance properties of particle-reinforced epoxy. Results obtained reveal that surface wear of the examined epoxy-based composites occurred by the crack initiation by the abrasive tips of the wear tester, crack propagation and/ or crack pinning. Linear regression model has accuracies of 99.94, 99.92, 99.93, 99.88, 99.91 and 99.92% with respect to various grades of composites examined. Response surface two-functional interaction model exhibits a better goodness of fit than the response surface linear model that shows an outlier. The response surface linear model best fits the wear rates of AlnpUCSnp/epoxy and AlnpCCSnp/epoxy with respective adequate precision of 14.138 and 10.204 affirming the model’s adequate signal. Hence, this study establishes that epoxy-based hybrid composite having 4.7%–82.47 nm-sized aluminium-5.76%–49.85 nm-sized carbonised coconut shell hybrid particles experiences a surface wear of 0.00272721 g per metre when it is in contact with a rough surface under an applied load of 16.71 N at a speed of 0.7 ms−1.