Development and Characterization of Bioresin-Based Composites from Vegetable Oils for Automotive Applications
Tez Türü: Doktora
Tezin Yürütüldüğü Kurum: Çukurova Üniversitesi, Mühendislik Fakültesi, Otomotiv Mühendisliği, Türkiye
Tez Danışmanı: Mustafa Özcanlı
Tezin Onay Tarihi: 2025
Tezin Dili: İngilizce
Desteklendiği Program: Diğer
Özet:
In this study, while using bio-based resin by adding five different vegetable oils to the epoxy resin in certain proportions as a matrix, the mechanical, thermal, physical, and morphological characterization of the bio-composites formed by reinforcing this bio-based resin with flax/jute intraply woven fabric was investigated. The production of the materials was carried out by vacuum assisted resin transfer molding method. Bio-based resin was created by adding cottonseed oil, rapeseed oil, linseed oil, palm oil, and soybean oil to 10%, 20%, 30% and 40% to epoxy resin. Composite products were produced in 21 different combinations, including samples prepared with pure epoxy resin. As a result of mechanical tests such as tensile, three-point bending, hardness and Charpy impact, it was determined that adding 10% to 20% vegetable oil to the epoxy resin increased the flexibility of the sample while reducing its strength to a certain extent. As the oil content increased towards 40%, significant decreases were observed in mechanical properties compared to samples prepared with pure epoxy resin. This situation was also confirmed in the morphological image analysis of the samples. In the physical test such as water test, the addition of canola, palm and soybean oil to the resin at 10% and 20% decreased the water absorption rates. In thermal tests, TGA analysis reveals that as the oil content increases, the initial decomposition temperature decreases compared to the pure epoxy resin sample and also a decrease in thermal stability is observed. DSC analysis shows that at 10% oil content, the glass transition temperature increases significantly compared to the pure epoxy resin sample, and significant increases are reflected in the reaction temperature. When the results are evaluated as a whole, it is predicted that adding 10% to 20% vegetable oil to epoxy resin, which is a petroleum-based source, will be an environmentally friendly bioresin and will increase material properties such as toughness, although it reduces some mechanical properties, and can be used in areas exposed to external forces in vehicles. It is also predicted that it can be preferred in the interior of vehicles due to its physical and thermal properties.