Indian-Australian Teenager Angelina Arora Develops Rapidly Biodegradable Plastic from Prawn Shells and Silk Cocoons

Key Facts

• Inventor: Angelina Arora, Indian-Australian student from Sydney Girls High School, Adelaide.
• Year: Invention developed around 2018 while in school.
• Material Components: Chitin extracted from prawn shells, converted into chitosan, and combined with fibroin, a protein from silk cocoons.
• Bioplastic Properties: Low-cost, durable, transparent, insoluble, biodegradable.
• Decomposition Time: Approximately 33 days under appropriate disposal conditions, significantly faster (1.5 million times) than conventional plastic.
• Environmental Benefit: Releases nitrogen while decomposing, a nutrient essential for plant growth and soil fertility.
• Awards: Innovator to Market Award (2018 BHP Billiton Foundation Science and Engineering Awards), fourth place at Intel International Science and Engineering Fair, Australian Geographic Society’s Young Conservationist of the Year (2019).

Background & Context

Plastic pollution is a major global environmental concern due to the extremely slow degradation of petroleum-based plastics, which remain for centuries causing ecological harm. Bioplastics made from renewable biological sources, such as chitin from crustacean shells, offer an eco-friendly solution by being naturally biodegradable. Chitin is a natural polysaccharide found in crustacean exoskeletons and fungal cell walls. Chitosan is derived by deacetylating chitin and possesses versatile applications in packaging and biomedical fields. Fibroin, a structural protein from silk cocoons, provides strength and flexibility when combined with chitosan. Angelina Arora’s bioplastic combines these materials to produce a plastic-like film that biodegrades rapidly, providing a sustainable alternative to traditional plastics.

Why This Matters for Exams / Exam Relevance

Angelina Arora’s innovation encapsulates critical themes relevant to current affairs, environmental science, and technology sections of competitive exams. It highlights advances in biodegradable materials, the use of renewable resources, and the scientific process of transforming waste into useful products. Knowledge of her awards and recognition at international science fairs also adds to current affairs knowledge. Understanding key terms such as chitin, chitosan, fibroin, and their roles in sustainable materials development forms part of syllabus topics in environmental and material sciences.

Points to Remember

• Chitin is a natural polysaccharide found in crustacean shells and fungal cell walls; it is insoluble and serves as a raw material for bioplastics.
• Chitosan is derived by deacetylating chitin, making it soluble in mild acids and useful for biodegradable film formation.
• Fibroin is a protein from silk cocoons that adds mechanical strength and flexibility to bioplastics.
• Angelina Arora’s bioplastic decomposes fully in about 33 days under bacterial conditions, which is 1.5 million times faster than conventional plastic.
• The bioplastic releases nitrogen nutrient when decomposed, which can improve soil fertility and reduce the need for synthetic fertilizers.
• Her invention has won prominent awards and is under consideration for commercial development by international companies as of 2022.