CHARACTERISATION OF CHITOSAN AFTER CROSS-LINKING BY TANNIC ACID

• Authors: Alina Sionkowska , Beata Kaczmarek , Katarzyna Lewandowska
• Languages of publication: EN EN

Abstracts

EN

Chitosan is widely applied in biomedical and cosmetic fields. For this reason, there is a need to modify this biopolymer to achieve new properties of chitosan-based materials. The properties of chitosan can be modified by several cross-linking methods. In this work, we used the chemical cross-linking of chitosan with tannic acid, after which cross-linked chitosan was shaped into a 3D structure by the lyophilisation process. For the material obtained, FTIR-ATR analysis was performed to characterise the structure of cross-linked chitosan. Moreover, mechanical properties and swelling properties were measured for chitosan before and after cross-linking. The results show that several properties of chitosan can be changed after cross-linking by tannic acid. The positions of bands in the FTIR spectra of chitosan were shifted after cross-linking. Mechanical properties were altered for cross-linked chitosan. However, the highest compressive modulus was observed for pure chitosan. The lowest compressive modulus was observed for chitosan cross-linked with 20 wt% of tannic acid. Swelling behaviour also depends on the cross-linking of chitosan. It decreases for chitosan after cross-linking by tannic acid. Overall, the properties of cross-linked chitosan depend on the amount of tannic acid used for modification. This method of cross-linking can be useful for obtaining materials with specific properties.

Keywords

EN

chitosan; cross-linking; mechanical properties; tannic acid

Discipline

• CHEMISTRY: CHEMISTRY

• Publisher: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
• Journal: Progress on Chemistry and Application of Chitin and its Derivatives
• Year: 2014
• Volume: 19
• Pages: 135-138

Contributors

author

Alina Sionkowska

• Faculty of Chemistry, University of Nicolas Copernicus

author

Beata Kaczmarek

• Faculty of Chemistry, University of Nicolas Copernicus

author

Katarzyna Lewandowska

• Faculty of Chemistry, University of Nicolas Copernicus

References

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• Document Type: article