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Studies on the development and characterization of bioplastic film from the red seaweed (Kappaphycus alvarezii)

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Abstract

Seaweeds rich in polysaccharides are considered commercially important because of their wide range of industrial applications. In this study, the red seaweed Kappaphycus alvarezii was used for bioplastic film production. Plasticizer polyethylene glycol (PEG) to seaweed biomass ratio was optimized and a thin bioplastic film with higher tensile strength was produced. The films obtained were characterized by its thickness, tensile strength, colour (L, a, b), elongation at break (EAB), water vapour transmission rate (WVTR) and oxygen transmission rate (OTR). TG-DSC, AFM, SEM and FTIR spectroscopy analysis were performed to assess the composition, phase transitions and chemical reaction capabilities of the film. The bioplastic film obtained from 4% K. alvarezii (whole seaweed) showed better physical and mechanical properties, whereas TG-DSC, FTIR and AFM showed similar kind of bioplastic properties in all the concentrations. Decrease in OTR was observed against decreasing wall thickness of the film. The present study suggests that the seaweed would be a potential alternate source for bioplastic production which may reduce the usage of non-degradable plastics.

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Abbreviations

KBPF:

Kappa bioplastic film

KS:

Kappaphycus seaweed

EAB:

Elongation at break

WVTR:

Water vapour transmission rate

OTR:

Oxygen transmission rate

TG-DSC:

Thermo gravimetric differential scanning colorimeter

FTIR:

Fourier-transform infrared spectroscopy

AFM:

Atomic force microscopy

SEM:

Scanning electron microscope

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Acknowledgements

The authors thank the National Institute of Ocean Technology, Chennai, for providing necessary laboratory facilities.

Funding

The authors thank the Ministry of Earth Sciences, Govt. of India, for the funding support.

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Correspondence to Muthiyal Prabakaran Sudhakar or Gopal Dharani.

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The authors declare that there is no conflict of interest.

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Responsible editor: Santiago V. Luis

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Sudhakar, M.P., Magesh Peter, D. & Dharani, G. Studies on the development and characterization of bioplastic film from the red seaweed (Kappaphycus alvarezii). Environ Sci Pollut Res 28, 33899–33913 (2021). https://doi.org/10.1007/s11356-020-10010-z

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  • DOI: https://doi.org/10.1007/s11356-020-10010-z

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