Browsing by Author "Mohammed Kayode Adebayo"

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    Eggshell nanoparticle reinforced recycled low-density polyethylene: A new material for automobile application
    (Elsevier, 2021-05-07) Sefiu Adekunle Bello; Nasirudeen Kolawole Raji; Maruf Yinka Kolawole; Mohammed Kayode Adebayo; Jeleel Adekunle Adebisi; Kehinde Adekunle Okunola; Mustekeem Olanrewaju AbdulSalaam
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    Influence of thermal ageing on the microstructural and mechanical characteristics of banana stem particles reinforced aluminium-alloy matrix composites
    (2024) Sefiu Adekunle Bello; Abdul Ganiyu Funsho Alabi; Suleiman Danjuman Daudu; Stephen Durowaye; Mohammed Kayode Adebayo; Luqman Babatunde Eleburuike; Sikiru Ottan Abdulraman; Shuaib Ajibola Mohammed
    The influence of thermal ageing on the microstructural and mechanical characteristics of banana stem particles (BSp) reinforced aluminium-alloy matrix composites was investigated. Sand casting was used to produce the composites, comprising aluminium alloy matrix reinforced with BSp of varying weight ratio of 0 wt. %, 1 wt. %, 3 wt. %, 4 wt. %, 5 wt. % and 6 wt. % were thoroughly mixed. Test samples for mechanical characterisation were prepared from the sand cast (6 mm diameter by 125 mm rods for tensile test). Thermal ageing was done for 2 hours (hrs) at 350 0C. The composites were evaluated for tensile, modulus of elasticity, hardness, and microstructural characteristics. The thermally aged samples demonstrated greater tensile strength and toughness as the concentration of BSp increased up to 5 wt. % in the composite in comparison with the as-cast samples. The greatest characteristics were demonstrated at 5 wt. % BSp concentration. Lower hardness was demonstrated by the as-cast samples in comparison with the aged-hardened samples. There was 5 wt. % BSp concentration in the alloy enhanced thermal ageing. These indicate that greater mechanical characteristics of the composites can be obtained by thermal ageing.
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    Sustainable hybrid nanoparticle reinforced low‑density polyethylene: emerging materials for engineering applications
    (Springer, 2024-05-15) Sefiu Adekunle Bello; Mohammed Kayode Adebayo; Raphael Gboyega Adeyemo; Patricia Abimbola Popoola
    Nanoparticles are materials that have diameter/dimension between 1 and 100 nm. The term also covers materials as high as 500 nm in diameter or length. Their emergence has given birth to a new set of nanocomposites with more promising properties than the conventional composites. Moreover, polyethylene products generate wastes. Their managements can create wealth and reduce dependence on the virgin polyethylene for green material productions. In this study, Delonix regia pod and eggshell hybrid nanoparticles, up to 12% (by wt), were incorporated into the low-density polyethylene. Properties of the developed hybrid nanocomposites were investigated and compared with those of the existing automobile dashboard cover material properties in literature. Results obtained from mechanical examinations show 332.77, 179.19, 807.32, 63.61, 4.33, 26.61 and 21.35% increases in tensile strength, percentage elongation, tensile modulus, flexural strength, flexural deflection, flexural energy absorbed and hardness, respectively; with consequent reductions in the flexural modulus and impact energy by respective 4.67 and 4.40% at 4% Delonix regia pod, 6% eggshell particles addition to the virgin low density polyethylene. Maximum impact energy of 25.09 J equal to 16.48% increase was noticed at 4% Delonix regia pod 4% eggshell particle addition to the recycled low-density polyethylene. Virgin low-density polyethylene containing 4% Delonix regia pod, 6% eggshell particles having greater tensile strength and impact energy than each of the existing materials for the automobile dashboard cover is confirmed suitable for both upper and lower layers of the dashboard cover. Hence, 4% Delonix regia pod 6% eggshell particles reinforced virgin low-density polyethylene has 28.39 ± 1.42 Nmm−2 tensile strength; 1137.42 ± 15 Nmm−2 tensile modulus; 6.24 ± 0.68% tensile elongation; 21.86 ± 0.9 J impact energy; 69.17 ± 3.51 VHN hardness value; 28.11 ± 0.84 Nmm−2 flexural strength; 7.42 ± 0.8 flexural deformation; 314.41 ± 20.53 Nmm−2 flexural modulus and 0.30 J flexural energy.
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    Sustainable Materials from Wastes for Engineering Applications
    (Nigerian Institution of Metallurgical, Mining and Materials Engineers (A Division of The Nigerian Society of Engineers), 2025-06-25) Sefiu Adekunle Bello; Abdul Ganiyu Funsho Alabi; Sunday W. Balogun; Mohammed Kayode Adebayo; Suleiman Danjuma Daudu; Aisha Mayowa Akintola; Karimat Aderoju Saba
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    Vehicle bumper fascia prototyping using sustainable nanocomposites
    (2025) Sefiu Adekunle Bello; Sodiq Olamide Olaitan; Mohammed Kayode Adebayo; Lateef Olayinka Akinwande; Funsho Olaitan Kolawole; Maruf Yinka Kolawole; Abdulmumuni Ariboh Suberu; Fawaz Afolami Arowoduye; Muhiz Akangbe; Roseline Ifeoluwa Michael; Timothy Adeyi
    Eggshells and date seeds are wastes which contribute to land pollution. Their conversions to useful materials are important to save the environment from the health hazards associated with rotten eggshells and possible impacts from the date seed wastes. This study focuses on conversion of eggshells and date seeds into reinforcing particles for producing sustainable polymeric and metallic nanocomposites for prototyping a vehicle bumper fascia. Eggshell nanoparticles were incorporated into low-density polyethylene up to 12 wt%. Metallic nanocomposites were produced using Al–Cu–Mg sourced from aluminium alloy scraps and date seed particles and then, heat treated. The developed nanocomposites were analysed chemically, structurally, and mechanically. The structural integrity of the polymeric nanocomposites was confirmed by the scanning electron microscope. Enhancements in impact energy, tensile and flexural strengths at 12 wt% of eggshell nanoparticle additions to the very low-density polyethylene are 1.5, 110.4 and 47.7 %, respectively. 1 wt% date seed particle reinforced Al–Cu–Mg that has highest impact energy after annealing treatment is selected for the mould parts fabrication for forming the bumper fascia. Property comparison of the produced polymeric nanocomposites with those of existing bumper fascia materials affirms that the tensile strength and impact energy of the nanocomposite that contains 12 wt% eggshell nanoparticles are suitable for the automobile bumper fascia. Hence, fabrication of the bumper fascia using the VLDPE/12 wt% eggshell nanocomposite was fruitful.