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Thermal and mechanical properties of UV irradiated collagen/chitosan thin films |
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| Authors: | A Sionkowska M Wisniewski GF Poggi CA Maxwell |
| Institution: | a Faculty of Chemistry, N. Copernicus University, Gagarin 7, 87-100 Torun, Poland b Faculty of Chemistry and Industrial Chemistry, Via Dodecaneso 31, University of Genoa, Italy c Department of Optometry and Vision Sciences, University of Cardiff, Redwood Building, King Edward VII Avenue, Cathays Park, Cardiff CF10 3NB, Wales, UK |
| Abstract: | The thermal and mechanical properties of collagen/chitosan blends before and after UV irradiation have been investigated using thermal analysis and mechanical (Instron) techniques. Comparisons were made with the thermal and mechanical properties of both collagen and chitosan films. Air-dried collagen, chitosan and collagen/chitosan films were exposed to UV irradiation (wavelength 254 nm) for different time intervals. Thermal properties of collagen/chitosan blends depend on the composition of the blend and are not significantly altered by UV irradiation.Mechanical properties such as ultimate tensile strength and ultimate percentage of elongation were much better for collagen films than for collagen/chitosan films. The results have shown that the mechanical properties of the blends were greatly affected by the duration of UV irradiation. Ultimate tensile strength and ultimate percentage elongation decreased after UV irradiation of the blend. Increasing UV irradiation leads to an increase in Young's modulus of the collagen/chitosan blend. |
| Keywords: | Collagen/chitosan blend Blend UV irradiation Thermal properties Mechanical properties |
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