Fully Deacetylated Chitosan From Shrimp And Crab Using Minimum Heat Input | ||
| Egyptian Journal of Chemistry | ||
| Volume 66, Issue 2, February 2023, Pages 321-337 PDF (1.89 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2022.136694.6020 | ||
| Authors | ||
| Alaa Ewais1; Abdel Ghany Abdel Ghany1; R Saber1; Mahmoud Sitohy* 2 | ||
| 1Biochemistry Branch, Soil and Water Science Department, Faculty of Technology and Development, Zagazig University | ||
| 2Biochemistry Department, Faculty of Agriculture, Zagazig University | ||
| Abstract | ||
| This study investigated the ideal conditions for achieving fully deacetylated chitosan from shrimp and crab shell detritus. The deacetylation method consisted mainly of two steps, heating the decolorized chitin at 100 ºC for two, four, and six hours, then cool-stirring at 200 rpm for zero, two, and four hours. The maximum degree of deacetylation (DD) resulted from 6-hours of heating and 4-hours of cool-stirring. The highest DD, determined by the potentiometric titration method, FTIR, and 1H NMR of shrimp chitosan recorded 97.2%, 98.8%, and 96.39%, against 99.8%, 100%, and 100%, for crab chitosan, respectively. The physicochemical properties of the chitosan with the highest DD have were elucidated by X-ray, FTIR, 1H NMR, and SEM. The X-ray, FTIR, and 1H NMR analysis confirmed the preservation of the identical structure of the prepared chitosan. The prepared shrimp chitosan exhibited 96.5% solubility, 548.71% WBC, and 499.60% FBC, compared to 99%, 475.88%, and 495.84% for crab chitosan, respectively. | ||
| Keywords | ||
| Shrimp chitosan; Crab chitosan; Fully deacetylated; X-ray; FTIR; 1H NMR | ||
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