Mechanical Properties Of Collagen And Chitosan Composite Films
Keywords
Collagen, Chitosan, Edible Composite Film, Mechanical Properties
Abstract
Edible composite films were prepared using catfish skin collagen and chitosan as raw materials. The influence of process parameters such as the mass ratio of collagen and chitosan, plasticizer type and amount, heat treatment temperature and time on the performance of edible composite films was investigated through orthogonal experiments. The results show that: the mass ratio of collagen to chitosan and the heat treatment temperature have a greater impact on the tensile strength; the addition of glycerin has a significant impact on the elongation at break of the composite film, while the heat treatment time has a small impact on the elongation at break of the composite film. . The preparation process of the composite membrane with the best mechanical properties is as follows: the mass ratio of collagen to chitosan is 6:4, the amount of glycerol added (based on total solute) is 20%, the heat treatment temperature is 70 ¡ãC, and the heat treatment time is 30 min. Under these conditions, the surface of the composite membrane obtained was smooth and bubble-free, the tensile strength was (21.98¡À0.33) MPa, and the elongation at break was (127.35¡À3.03)%.
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Original research was done by Liu Hua, Su Wei, Yuan Meilan, Zhao Li, Chen Lili, Chen Dajia
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