Water soluble chitosan (WSC) has been successfully synthesized from crab shells waste through several processes i.e. demineralization, deproteination, deacetylation, and depolimerization. Chitin was obtained by demineralization and deproteination of crab shells. While chitosan was obtained by deacetylation of chitin. Deacetylation of chitin was carried out at varied temperature i.e. 50, 60, 70, 80, 90, and 100°C. The optimum yield of WSC was obtained at temperature of 90°C. The IR spectra of chitin, chitosan, WSC were compared to those from literature. The highest deacetylation degrees (DD) of chitosan was 84.34% that obtained by deacetylation at 90°C. While WSC highest DD value was 75.2% that obtained from chitosan that treated at 100°C. The solubility test of WSC proved that chitosan was successfully converted into WSC. The optimum WSC solubility in water at room temperature was 1.842 g/L while at 40°C was 1.846 g/L that obtained from deacetylation of chitosan at 90°C. While chitosan that treated at 100°C has solubility in HCl 0.1 M of 1.908 g/L at at room temperature and 1.952 g/L at 40°C.

Original languageEnglish
Title of host publication3rd International Seminar on Chemistry
Subtitle of host publicationGreen Chemistry and Its Role for Sustainability
EditorsFredy Kurniawan, Yuly Kusumawati, Sri Fatmawati, Hendro Juwono, Adi Setyo Purnomo
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417755
Publication statusPublished - 14 Dec 2018
Event3rd International Seminar on Chemistry: Green Chemistry and Its Role for Sustainability, ISOC 2018 - Surabaya, Indonesia
Duration: 18 Jul 201819 Jul 2018

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference3rd International Seminar on Chemistry: Green Chemistry and Its Role for Sustainability, ISOC 2018


  • Chitosan
  • Crab Shells
  • Degree of Deasetylation
  • Solubilty Test
  • Water-Soluble Chitosan


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