Abstract Aging treatment was used as a safe and green physical crosslinking method to successfully improve the physicochemical properties of collagen casing films. The aging treatment increased the Young's modulus (YM) of dry, wet, and boiled collagen films, as well as the tensile strength (TS) of wet and boiled collagen films to some extent. However, the highest aging temperature (80 °C) together with the higher relative humidity (RH) values (70% and 80%) led to the decreases in YM and TS and increases in elongation at break (EB). The aging treatment also improved the cooking performance of collagen films, like water absorption and shrinkage in boiling water, where the water absorption decreased to the range of 185%–102% and the shrinkage decreased to the range of 41.5%–21.5%. Collagen films after aging treatment had higher moisture contents than that of control film, and their moisture contents increased with increasing aging time and RH value. The thermal properties of collagen films was improved only at lower temperatures (

中文翻译：

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老化处理对胶原膜理化性质的影响

摘要 老化处理作为一种安全、绿色的物理交联方法，成功地改善了胶原蛋白肠衣膜的理化性能。老化处理在一定程度上提高了干、湿和煮胶原膜的杨氏模量（YM），以及湿和煮胶原膜的拉伸强度（TS）。然而，最高时效温度 (80 °C) 以及较高的相对湿度 (RH) 值（70% 和 80%）导致 YM 和 TS 降低，断裂伸长率 (EB) 增加。老化处理还改善了胶原薄膜的蒸煮性能，如沸水吸水率和收缩率，吸水率降低到185%~102%，收缩率降低到41.5%~21.5%。老化处理后的胶原蛋白薄膜含水量高于对照薄膜，且其水分含量随着老化时间和RH值的增加而增加。胶原蛋白薄膜的热性能仅在较低温度下得到改善（