BURSA ULUDAĞ UNIVERSITY GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES

TEMESGEN, Alhayat Getu (2022) BURSA ULUDAĞ UNIVERSITY GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES. Doctoral thesis, UIN SAIZU Purwokeerto.

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Abstract

The rapid developments of technology in textile industries have been improving the performance of textile fabrics and finishing properties such as durability, water replants and breathability. The natures and properties of textile fibers have a major impact on the physical and mechanical properties of materials made from them such as yarns, fabrics as well as composites. For a long period of times, metals have been used as the most preferred structural materials. However the rapid growing and unlimited demands of human being have pushed researchers to innovate new materials called composite materials, having high specific strength and stiffness. Petrochemical based composite materials are not only non-ecofriendly products but also they bring a serious health problems during their manufacturing, usage and waste disposals. Recently, researchers and manufacturers have focused on natural fiber reinforced materials obtained from leaf, bast and fruit for green composite applications. Natural fibers are abundantly available, light weight, low cost and renewable with good mechanical strength. Substituting of commercially used synthetic fibers and resins by naturally existing resources as a reinforcing material and matrix are the best alternative to overcome economic, health hazard and environmental problems in composite manufacturing sectors. This Ph.D dissertation focuses on the investigation and characterization of novel textile fabric reinforced green composite materials and enhancing their mechanical properties for light weight structural as well as sound absorption applications. Enset woven fabrics were used as reinforcing materials for this study. A new bio resin material was prepared by mixing separately prepared acacia tortillas and frankincensepapyrifera bio resins at different ratios such as 75:25, 70:30, 65:35, 60:40, 55:45 and 50:50. Mechanical and sound absorption performance of enset fabric reinforced bio composites was studied with special reference to bio resin preparation ratio and number of fabric layer. Also, enset nano fibers were manufactured by -amylase enzyme treatment and mechanical hammering using enset fibers and enset fabrics. These nano fibers would be used to produce more advanced textile structures having unique properties such as higher weight to strength ratio, large surface area and bio-degrability. Key words: Acoustic, biodegradable, bio resin, enset nanofiber, mechanical stre

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