DataVXCellulose Chemistry and TechnologyPaper
journal article·2022-09-28Open access

"CHITOSAN OLIGOMERS – SYNTHESIS, CHARACTERIZATION AND PROPERTIES "

", DANIELA AILINCAI, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania ", IRINA ROSCA, "“Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania ", LAURA URSU, "“Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania ", ANDREI DASCALU, "“Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania "

Cellulose Chemistry and Technology· Volume 56· Issue 7-8
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Source abstract

Abstract

The paper presents the synthesis of chitosan oligomers with different polymerization degrees (PD) by chitosan depolymerization in the presence of nitrous acid, aiming to study the correlation between their polymerization degree and their properties. Seven oligomers were synthesized and purified. The oligomers were characterized from the structural point of view by FTIR, NMR and UV-Vis spectroscopy, revealing the formation of shorter chains with an ending unit of 2.5-D-anhydromannofuranose. The morphology evaluation at micro and nano levels by SEM and AFM revealed the granular morphology of the oligomer films, while WXRD and POM demonstrated their higher degree of ordering, in comparison with the parent chitosan. The antimicrobial tests showed the potential of the synthesized compounds to be used for biomedical purposes, the oligomers presenting antifungal activity, which increased with the decrease in their polymerization degree, especially against Aspergillus niger.
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Research context

Polymers

OpenAlex topics: Nanocomposite Films for Food Packaging · Polydiacetylene-based materials and applications · Antimicrobial agents and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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