Abstract
Research on obtaining chitin from periwinkle shell is scarce due to the very low yield of chitin from this kind of shell. Thisstudy reports a method of processing periwinkle shells to obtain high yield, bio-medically suitable chitin. The experimentwas designed using IM and 2M concentrations of HCl for demineralization and a 1M NaOH concentration for deproteinization. FTIR, SEM, XRD and DTA analytical tools were used to characterize the extracted chitin. The FTIR spectral, XRD patterns and SEM analysis, revealed the complete removal of calcium carbonate by the acid concentrations used. The particle-like form of periwinkle shell was transformed to sheet-like fiber and globular-like fiber of α-chitin by increasing the concentration of HCl from1M to 2M respectively. The crystal size increased from 11.2Å (1M HCl) to 13.4Å (2M HCl). The yield of chitin from periwinkle shell also increased from 52% to 71% using 1M and 2M HCl respectively. Thus, acid concentrations can be used to alter the structure of chitin with different mechanical properties.
Highlights
Chitin is the second most abundant polysaccharide after cellulose [1,2,3]
Waste from periwinkles is a major source of environmental pollution and there is a need to harness this waste into functional biomaterials
This study presents a novel procedure for extracting high yield https://journals.agh.edu.pl/jcme chitin from periwinkle shells with its resultant morphological features
Summary
Chitin is the second most abundant polysaccharide after cellulose [1,2,3]. Structurally it is similar to cellulose, but differs with the acetamido (-NHCOCH3) group positioned at the C2 position [1]. Hard nitrogenous polysaccharide found in the exoskeleton and internal structure of invertebrate [1] such as Crustacea and in the cell walls of certain Fungi and Algae [4]. The shells of these animals consist mainly of chitin, calcium carbonate, proteins, lipids and pigments, which are removed via: demineralization (removal of calcium carbonate), deproteinization (removal of protein) and depigmentization (removal of pigments such as carotenoids) [4]. This study presents a novel procedure for extracting high yield https://journals.agh.edu.pl/jcme chitin from periwinkle shells with its resultant morphological features
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