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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:01 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Physics and Technology of Renewable and Alternative Energy Sources
Title:
Study of the degree of N-acetylation in different samples of chitosan by differential scanning calorimetry
Authors:
Miruna OANCEA (1), Cornelia NICHITA (2,3), Adriana BĂLAN (1,2)
Affiliation:
1) University of Bucharest, Faculty of Physics, Bucharest-Măgurele, 405 Atomistilor str., Bucharest-Măgurele, Romania
2) University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, 405 Atomistilor str., PO Box MG-38, Bucharest-Măgurele, Romania
3) University of Bucharest, Faculty of Physics, 3Nano-SAE Research Center, MG-38, 405 Atomistilor Street, 077125, Magurele, Romania,
3)National Institute for Chemical – Pharmaceutical Research and Development, 112 Vitan Avenue, 031299, Bucharest, Romania
E-mail
adriana.balan@unibuc.ro
Keywords:
chitosan, thermal analysis, degree of N-acetylation
Abstract:
Chitosan is the most important chitin derivate, the second most important natural polymer in the world, it is a constituent of the cell walls of some fungi or of the shell of some crustaceans, obtained by thermochemical deacetylation of chitin. Chitosan has a wide spectrum of applicability in medicine and pharmaceuticals (anti-inflammatory drugs, anti-cancer drugs, vaccines, bone and cartilage tissue engineering, etc.), food packaging, agriculture (pollution water treatment) and textile industry. The degree of N-acetylation influences chitosan properties and, therefore, it is crucial to determine this parameter before using the material for different applications. Differential scanning calorimetry (DSC) is an efficient thermal method to characterize the physical properties, allowing the study of the thermal dehydration and degradation of chitosan. We propose a comparative DSC study of different chitosan samples, where we estimate the degree of N-acetylation and the water content. The water-polymer interaction is discussed in terms of degree of N-acetylation and cross-linker in the case of chitosan films.
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