Introduction to Green Composites and Their Applications

Green composites, composed primarily of natural fibres and biodegradable resins, represent a pivotal shift towards environmentally responsible material design. This chapter provides a comprehensive introduction to green composites, exploring their origin, evolution, material constituents, fabrication techniques, and wide-ranging applications. Emphasizing their ecological advantages over conventional synthetic composites, this chapter highlights how green composites address critical sustainability challenges such as fossil fuel dependency, plastic waste, and high carbon emissions. Key natural fibres such as jute, coir, bamboo, and cane are examined in terms of mechanical and environmental performance, while biodegradable resins like polylactic acid, polyhydroxyalkanoate, polycaprolactone, and polybutylene succinate are discussed for their functional properties and compatibility with sustainable goals. This chapter also outlines various manufacturing techniques, with a particular focus on fused deposition modelling as an emerging method for shaping intricate green composite components with precision and material efficiency. Applications across the automotive, aerospace, construction, medical, packaging, consumer goods, sports, and marine sectors are reviewed, highlighting the versatility of green composites in meeting the growing demand for low-impact materials. Finally, this chapter underscores the economic, environmental, and technological advantages of green composites in advancing the circular economy and sustainable development. It sets the foundation for understanding the increasing relevance of bio-composites in contemporary material science and industrial practice.