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| dc.contributor.author | Melese, Shiferaw Kebede | |
| dc.date.accessioned | 2025-03-06T06:26:26Z | |
| dc.date.available | 2025-03-06T06:26:26Z | |
| dc.date.issued | 2024-10 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/16551 | |
| dc.description.abstract | The world faces a significant challenge with textile fabric waste, ranking as the second most polluting material after plastic. Recycling and reusing these textile wastes, particularly fabric scraps from the garment industry, can play a crucial role in environmental sustainability and resource optimization. This study focuses on developing and characterizing sandwich composites made from recycled cotton rags, specifically grey cotton fabric and wool garment waste scraps, which are reinforced in a polyester matrix. These waste materials, typically remnants from garment production, were arranged in different configurations (CCCC, CGCG, CGGC, GCCG, GGGG, and chopped) and tested for various physical, mechanical, and thermal properties. Among the configurations, CGGC, GGGG, and chopped arrangements demonstrated superior surface finish, strength, and bonding. Notably, the GGGG configuration showed the highest impact toughness, achieving 78.20 Joules, whereas the CCCC orientation had the lowest at 8.75 Joules. Water absorption tests revealed excellent moisture resistance for up to 30 hours of immersion, indicating fireproof and waterproof properties, crucial for outdoor and automotive applications. Thermal analysis using thermogravimetric analysis (TGA) confirmed thermal stability up to 305°C, making these composites suitable for automotive applications such as car hoods, where temperatures remain below 105°C. Dilatometry results showed minimal volume change up to 300°C, further affirming the material's suitability for high-temperature environments. Free-vibration analysis indicated poor energy absorption for CCCC, whereas CGGC composites exhibited enhanced energy-absorbing properties. Additionally, micrography analysis highlighted superior internal bonding and stacking, contributing to the overall durability of the composite. Incorporating recycled fabric into composite materials not only reduces environmental pollution but also transforms the textile and garment industry towards a zero-waste production system. The composites developed in this study, particularly for automotive applications, demonstrate a promising approach to addressing environmental challenges while offering economic benefits through lightweight, durable, and sustainable materials. Key Words: Automobile Hood, Characterization, Cotton Rag, Composite Material, Mechanical Properties, Thermal Analysis, Textile Waste Recycling. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Mechanical and Industrial Engineering | en_US |
| dc.title | Development and Characterization of Cotton Rag Reinforcing Polyester Matrix Composite Materials for the Application of Automobile Hood | en_US |
| dc.type | Thesis | en_US |
