TY - JOUR
T1 - Extraction, characterization, and kinetics of N-deacetylation of chitin obtained from mud crab shells
AU - Narudin, Nur Alimatul Hakimah
AU - Rosman, Nurul ‘Aqilah
AU - Shahrin, Ensan Waatriah ES
AU - Sofyan, Nofrijon
AU - Hanif Mahadi, Abdul
AU - Kusrini, Eny
AU - Hobley, Jonathan
AU - Usman, Anwar
N1 - Funding Information:
JH is grateful to National Cheng Kung University’s NCKU90 distinguished visiting scholar program for hosting his research. The author(s) received no financial support for the research, authorship, and/or publication of this article.
Publisher Copyright:
© The Author(s) 2022.
PY - 2022/6
Y1 - 2022/6
N2 - This study focuses on the isolation, chemical and crystalline structures, and the kinetics of heterogeneous deacetylation of chitin from mud crab shells (Scylla serrata). The independent variables in this work are temperature, NaOH concentration, and reaction time. The degree of deacetylation (DD) of the resulting chitosan was determined for different reaction times. It was found that the DD increases nonlinearly with the reaction time. The deacetylation of the chitin followed pseudo first-order kinetics and it occurred in two stages, which are respectively attributed to the reaction of acetamide groups in the amorphous region on the external layer, and in the crystalline region inside the chitin particles. The rate constants for the latter stage of the deacetylation at 35°C, 75°C, and 105°C were 4.67×10−4 min−1, 3.00×10−3 min−1, and 4.61×10−3 min−1, respectively. Based on this temperature-dependent rate constant, the activation energy of the slow deacetylation stage was estimated to be 32.6 kJ mol−1.
AB - This study focuses on the isolation, chemical and crystalline structures, and the kinetics of heterogeneous deacetylation of chitin from mud crab shells (Scylla serrata). The independent variables in this work are temperature, NaOH concentration, and reaction time. The degree of deacetylation (DD) of the resulting chitosan was determined for different reaction times. It was found that the DD increases nonlinearly with the reaction time. The deacetylation of the chitin followed pseudo first-order kinetics and it occurred in two stages, which are respectively attributed to the reaction of acetamide groups in the amorphous region on the external layer, and in the crystalline region inside the chitin particles. The rate constants for the latter stage of the deacetylation at 35°C, 75°C, and 105°C were 4.67×10−4 min−1, 3.00×10−3 min−1, and 4.61×10−3 min−1, respectively. Based on this temperature-dependent rate constant, the activation energy of the slow deacetylation stage was estimated to be 32.6 kJ mol−1.
KW - chitin
KW - chitosan
KW - kinetics
KW - mud crab shells
KW - N-deacetylation
UR - http://www.scopus.com/inward/record.url?scp=85132350309&partnerID=8YFLogxK
U2 - 10.1177/09673911221109611
DO - 10.1177/09673911221109611
M3 - Article
AN - SCOPUS:85132350309
SN - 0967-3911
VL - 30
JO - Composite Polymers
JF - Composite Polymers
ER -