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Mechanical properties, thermal stability, and solubility of sheep bone collagen–chitosan films
Author(s) -
Hou Chengli,
Gao Lingling,
Wang Zhenyu,
Rao Weili,
Du Manting,
Zhang Dequan
Publication year - 2020
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/jfpe.13086
Subject(s) - chitosan , ultimate tensile strength , solubility , gelatin , fourier transform infrared spectroscopy , materials science , thermal stability , elongation , chemical engineering , hydrogen bond , composite material , polymer chemistry , chemistry , organic chemistry , molecule , engineering
This study aimed to prepare sheep bone collagen–chitosan (BC‐CS) blend films and to characterize their film‐forming properties and structure. The blend films were prepared with different blend ratio of collagen and CS (BC:CS = 100:0, 60:40, 50:50, 40:60, and 0:100) with skin gelatin‐chitosan (SG‐CS) film used as a control. The results showed that the BC film became smoother, tougher, and more transparent when CS was added. The addition of CS significantly increased the tensile strength of the BC film. Elongation at break of the BC film decreased when the addition of CS was more than 50%. Compared with the BC film, the light barrier properties of the blended films increased in the ultraviolet region. The blend films exhibited increased thermal stability and decreased water solubility when compared with the BC film, but their permeability to water vapor increased undesirably. Fourier transform infrared spectroscopy results confirmed the formation of intermolecular hydrogen bonds between BC and CS in the blends. Conclusively, the film‐forming properties of BC‐CS blend films have the potential to be used for food packaging. Practical Applications The sheep bone collagen–chitosan blend film was fairly transparent and possessed good mechanical properties, which might be suitable for food packaging. This study can provide some reference for future development of bone collagen films for industrial application and bring forth new ideas for the utilization of animal bone coproducts.