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Biodegradable Solid Polymer Electrolytes from the Discarded Cataractous Eye Protein Isolate.

Prasun Chowdhury1, Abhijit Lincon2, Shishir Bhowmik1

  • 1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.

ACS Applied Bio Materials
|February 7, 2024
PubMed
Summary

Discarded cataractous eye protein isolate (CEPI) can be used to create biodegradable solid polymer electrolytes (SPEs). These protein-based SPEs offer tunable conductivity and mechanical properties for green electronics.

Keywords:
cataractous eye proteinimpedance spectroscopyion conductive polymerprotein filmsolid polymer electrolyte

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Area of Science:

  • Materials Science
  • Biotechnology
  • Electrochemistry

Background:

  • Solid polymer electrolytes (SPEs) require cost-effective, conductive, and stable materials.
  • Biodegradability and non-toxicity are crucial for environmentally friendly electronic devices.
  • Discarded biological materials offer a sustainable source for novel polymer matrices.

Purpose of the Study:

  • To investigate the use of cataractous eye protein isolate (CEPI) as a polymer matrix for SPEs.
  • To tune the properties of CEPI-based SPEs using natural plasticizers and cross-linkers.
  • To assess the potential of CEPI-based SPEs for flexible green electronics and biological applications.

Main Methods:

  • Extraction of protein isolate (CEPI) from discarded cataractous eye lenses.
  • Incorporation of sorbitol as a plasticizer and sinapic acid (SA) as a cross-linker.
  • Electrochemical characterization of the resulting solid polymer electrolyte species (SPEs).

Main Results:

  • CEPI-based SPEs exhibited high ionic conductivity (∼2 × 10-2 to ∼8 × 10-2 S cm-1).
  • Uncross-linked CEPI with sorbitol showed conductivity of ∼7.5 × 10-2 S cm-1 without salt.
  • Addition of NaCl enhanced conductivity to ∼8 × 10-1 S cm-1.

Conclusions:

  • Discarded CEPI is a viable alternative polymer matrix for developing SPEs.
  • CEPI-based SPEs demonstrate tunable, flexible, recyclable, biocompatible, and biodegradable properties.
  • This approach offers potential for sustainable SPEs in green electronics and biomedical devices.