Physicochemical, Microstructural and Thermal Characterization of Chitosan from Blue Crab Shell Waste and Its Bioactivity Characteristics

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Polymers and the Environment

DOI:https://doi.org/10.1007/S10924-019-01539-3· OSTI ID:22959281

Metin, Cansu; Alparslan, Yunus ^[1]; Baygar, Tuba ^[2]; Baygar, Taçnur ^[1]

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1. Mugla Sitki Kocman University, Faculty of Fisheries (Turkey)
2. Mugla Sitki Kocman University, Research Laboratories Center (Turkey)

The aim of the present study was to characterize the chitosan synthesized from blue crab (Callinectes sapidus, Rathbun, 1986) shell waste and to investigate its physicochemical and microstructural analyses as well as its antioxidant and antibacterial potentials. Microstructural and elemental characterization of the synthesized and commercial chitosan powders were performed using fourier transform infra-red spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. Thermal analysis were done using thermogravimetric analysis. Antioxidant and antimicrobial analysis were done using by DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging assay and agar well diffusion assay, respectively. The yield of the synthesized chitosan was calculated as 7.47% with moisture and ash contents of 0.151 ± 0.0025% and 0.19 ± 0.01%, respectively. Synthesized chitosan demonstrated the values of degree of deacetylation (71%), water (620.029 ± 52.59%) and fat (437.93 ± 15.92%) binding capacities, solubility (94.15 ± 2.84%), viscosity (463.25 ± 13.10 cPs) and whiteness (90.23 ± 0.27%). Antioxidant activity of synthesized chitosan was found to be moderate (55.30 ± 5.05%) when compared to ascorbic acid standard (87.61 ± 1.34). Chitosan obtained from blue crab shell also showed moderate antibacterial activity against Staphylococcus aureus and Escherichia coli. The findings of the study indicated that blue crab shell waste might be a potentially effective biopolymer source for commercial applications especially in food industry.

• OSTI ID: 22959281
• Journal Information: Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 11 Vol. 27; ISSN 1566-2543
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGAR
AMINO ACIDS
ANTIOXIDANTS
ASCORBIC ACID
ASH CONTENT
BIOLOGICAL WASTES
CRABS
DPPH
ESCHERICHIA COLI
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
MEAT INDUSTRY
OLIGOSACCHARIDES
SCANNING ELECTRON MICROSCOPY
SOLUBILITY
STAPHYLOCOCCUS
THERMAL GRAVIMETRIC ANALYSIS
VISCOSITY
X-RAY SPECTROSCOPY