Abstract
Chitin, extracted from silkworm chrysalides, was employed for the production of a high purity and porous chitosan, as observed by scanning
electron microscopy (SEM). Chitin and chitosan produced were characterized by infrared (FTIR), nuclear magnetic resonance (13C-NMR)
spectroscopy, thermal analysis (TGA), differential scanning calorimetry (DSC), and SEM. Two methods of chitin and chitosan extractions were
investigated and compared, and although these were of high purity, the yield of chitin and chitosan were low if compared with the chitin and
chitosan produced from crustacean shells. The yield of chitosan production by chitin deacetylation or degree of deacetylation (DD) was an average
83%. The molecular weight (MW) was determined by viscosimetric methods.
q 2005 Elsevier Ltd. All rights reserved.
AbstractChitin, extracted from silkworm chrysalides, was employed for the production of a high purity and porous chitosan, as observed by scanningelectron microscopy (SEM). Chitin and chitosan produced were characterized by infrared (FTIR), nuclear magnetic resonance (13C-NMR)spectroscopy, thermal analysis (TGA), differential scanning calorimetry (DSC), and SEM. Two methods of chitin and chitosan extractions wereinvestigated and compared, and although these were of high purity, the yield of chitin and chitosan were low if compared with the chitin andchitosan produced from crustacean shells. The yield of chitosan production by chitin deacetylation or degree of deacetylation (DD) was an average83%. The molecular weight (MW) was determined by viscosimetric methods.q 2005 Elsevier Ltd. All rights reserved.
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