International Journal For Multidisciplinary Research

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Preparation and Characterization of Starch-Based Bioplastics from Custard Apple (Annona squamosa) Peel

Author(s) Dr. Ravinder A, Ms. Pravalika Reddy Ankannagari, Ms. Sravani Kalyani Gangadhari, Ms. Rekha Marupaka
Country India
Abstract Preparation and Characterization of Starch-Based Bioplastics from Custard Apple (Annona squamosa) Peel
Growing environmental concerns over petroleum-based plastics have accelerated the development of biodegradable alternatives from renewable resources. This study reports the development of starch-based bioplastic films using custard apple (Annona squamosa) peel as an agro-waste raw material. Starch extracted from custard apple peel was blended with corn starch, glycerol (plasticizer), and vinegar (cross-linking agent) to prepare bioplastic films with varying starch concentrations. Biodegradability was evaluated using the soil burial method, and all formulations showed measurable degradation. Among them, Sample 3 exhibited the highest biodegradation rate of 59.58% and was selected for further characterization.
The optimized film showed an average thickness of 722.5 µm, low density (0.3223 g/cm³), and low grammage (0.025 g/cm²), indicating a lightweight and uniform structure. Solubility tests revealed low solubility in organic solvents (1.97–6.34%) and moderate solubility in hot and cold water (9.52–9.67%), reflecting the hydrophilic nature of starch-based polymers. The film also demonstrated minimal water absorption (0.1716%). These findings highlight the potential of custard apple peel starch for producing eco-friendly bioplastics suitable for sustainable applications.
Keywords Custard apple peel, bioplastic, starch, biodegradability, agro-waste
Field Engineering
Published In Volume 8, Issue 1, January-February 2026
Published On 2026-02-13
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E-ISSN 2582-2160
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