Browsing by Author "Adil, Md. Mahmudul"

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Fabrication and characterization of nature fiber based Self-healing composite materials.
(CUET, 9-Jun-2024) Adil, Md. Mahmudul
Recent research has focused on microcapsule-based self-healing polymer composites, offering significant potential for repairing damaged polymeric materials. In this study, microcapsule-based jute fiber-reinforced epoxy self-healing composites were manufactured using the vacuum bagging technique. Epoxy was combined with 3 wt.% of water-insoluble and water-soluble epoxy microcapsules that were synthesized by the in-situ polymerization method. The resulting composite underwent assessment for healing efficiency via impact strength recovery. Incorporating microcapsules within the cracked surface of the composite facilitated healing, demonstrating notable improvements in efficiency. Results indicated that the epoxy composite healed from a 1 mm deep crack exhibited higher impact strength recovery than samples healed from a 1.5 mm deep crack, with healing efficiencies of 83.9% and 78.89%, respectively. Scanning electron microscopic (SEM) analysis showed that the microcapsule size varies from 1.45 μm to 1.83 μm. FTIR spectra confirmed the presence of relevant chemical groups in both microcapsules and the composite.
Investigation of mechanical properties of rattan and bamboo fiber reinforced vinyl ester composite material for automotive application
(ELSEVIER, 2023) Parvez, Md Mahadi Hassan; Rupom, Shah Misbabun Nur; Adil, Md. Mahmudul; Tasnim, Tasfia; Rabbi, M.S.; Ahmed, Irfan
In scope of this research, manufacturing and mechanical characterization of rattan and bamboo fiber reinforced vinyl ester composite material were carried out. Bamboo and rattan fiber was extracted by using retting process followed by chemical treatment to enhance mechanical properties. The composite was manufactured using bidirectional fiber mat in vacuum bag molding and hand layup process. The weight fraction between rein- forcement and matrix was 24% and 76% respectively. Three types of composites were manufactured; Bamboo Fiber Composite (BFC), Rattan Fiber Composite (RFC), and Rattan (12%) and Bamboo (12%) Fiber Composite (RBFC). Different mechanical behavior of the composite was investigated, such as tensile strength, flexural strength, hardness, and impact strength. The maximum flexural and impact strength was found for RBFC with 57.66 MPa and 44.49 kJ/m2, respectively. It was found that about 29% and 17% of flexural strength and 29% and 78% of impact strength was improved for RBFC than BFC and RFC respectively. Finally, fabricated com- posites mechanical characteristics were compared to the Acrylonitrile Butadiene Styrene or ABS plastic materials mechanical characteristics.