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Journal of Polymer & Composites Original Research

Valorization of shrimp processing waste by green methodology and its application in Chitosan-PEG composite film

  1. AK Sanivarapu Department of Chemistry, Aditya University, Suramplaem
  2. Bk Babu Department of Engineering Chemistry, AU College of Engineering, Visakhapatnam
  3. NVVD Prasad Department of Chemistry, Aditya University, Suramplaem
  4. K. Satish Kumar Department of Chemistry, Aditya University, Suramplaem

Abstract

Shrimp processing waste is mostly unidentified marine by product, presents considerable environmental pollution which also offers a rich but not fully exploited sources of biopolymers. The current work presents a sustainable method to convert shrimp processing waste into chitosan a biopolymer by green methodology. Isolation of chitin to chitosan from shrimp processing waste was carried through four green methodology steps i. Demineralization using citric acid ii. Deproteinization using papain iii. Decolorization using hydrogen peroxide and iv. Deacetylation using Deep Eutectic Solvent (DES). The produced chitosan was analyzed by UV-Visible, IR, EDS and SEM techniques. The SEM and EDS images of commercial chitosan are compared with chitosan synthesized from shrimp processing waste. The results confirmed that chitosan from shrimp processing waste is of high quality with structural and morphological properties comparable to commercial chitosan.

A composite of Chitosan –PEG (Poly Ethylene Glycol) film was prepared by the solvent casting method using chitosan extracted from shrimp shell waste and commercial chitosan. These films are analyzed by FT-IR analysis and thickness. FT-IR analysis of both commercial chitosan and chitosan from shrimp processing waste with PEG confirmed the presence of characteristic functional groups and revealed that intermolecular hydrogen bonding interaction between both Chitosan and PEG. These results suggest successful incorporation of PEG into the chitosan matrix. Chitosan from shrimp processing waste – PEG film exhibited a greater thickness in comparison to the commercial chitosan-PEG film. These findings demonstrate that chitosan obtained from shrimp processing waste is an alternative way to produce eco-friendly biodegradable films. In addition, the physicochemical properties suggest that the composite film can be suitable for applications in food packaging, wound healing, biomedical devices and water purification. Hence this study highlights the conversion of sea food processing waste into biomaterial.

Keywords

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