Production of textile surfaces from strach-based biomaterials and sustainable bag design applications

In this thesis, starch-based bioplastic surfaces were developed as an ecological alternative in the search for sustainable materials, and their applicability within the field of design was investigated. Within the framework of the Cycle-P theme, based on associating plant-derived raw materials with photosynthetic processes, the role of the phosphorus cycle in biomass production was integrated into the design methodology. In this context, various mixture ratios and organic additives were tested to formulate the ideal bioplastic recipe; spices, fruit peels, coffee and tea grounds, and different agricultural wastes were used to generate color and texture variations. All additives were carefully selected to be plant-based, ensuring compatibility with the vegan-leather concept and enabling the production of biodegradable alternative surfaces. In some of the bioplastic samples, natural texture and color were preserved, and screen-printing experiments were conducted. All produced surfaces were evaluated through performance tests (including wet–dry rub fastness, lightfastness, and tear strength) according to TSE standards. Using the developed bioplastic surfaces, twelve bags reflecting the Cycle-P theme were designed and produced. The designs incorporated color transitions inspired by the relationship between natural pigments and biological cycles, organic textures created by plant-based additives, and 3D-printed accessory components that support the principle of sustainability. This approach resulted in a holistic design language inspired by biological cycles. The findings indicate that starch-based bioplastics have the potential to serve as an alternative to leather, demonstrating that a wide range of colors and textures can be achieved through plant-based additives while offering a material solution with significant environmental benefits. In this respect, the study not only contributes to the fields of sustainable fashion, materials science, and biodesign but also provides guidance for future research on performance enhancement of bioplastics, exploration of new textures using alternative organic additives, and investigations into the possibilities of industrial-scale production.