Abstract Bending, folding and stretching deformations occur during processing of shirred collagen casings, resulting in greater friction. Oil coating of the casings before aging can be used to improve the flexibility and lubricity of casings. In this study, the effects of 8 different oils on the properties of collagen casing films before and after aging were studied. Soybean oil (SBO) and Long Chain Triglyceride (LCT) had the best spreading ability on collagen casing films. The SBO coated films had the highest longitudinal Young’s modulus (YM) and tensile strength (TS) values with increases of 26 % in YM and 38 % in TS after aging. Oiling and aging of films led to significant decreases in water absorption and shrinkage compared to aged films without oiling. Also, the oiled and aged films had lower wettability of water and lower average friction coefficients. FTIR and XRD analyses showed that oiling reduced the triple helical contents in collagen casing films with further reduction after aging. However, binding and cross-linking of collagen fibers with oil molecules resulted in a more compact structure that was confirmed by SEM.

中文翻译：

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涂油后老化处理改善胶原蛋白肠衣膜性能

摘要 皱褶胶原肠衣在加工过程中会产生弯曲、折叠和拉伸变形，从而产生较大的摩擦。老化前对肠衣进行涂油，可提高肠衣的柔韧性和润滑性。本研究研究了8种不同油脂对老化前后胶原肠衣膜性能的影响。大豆油（SBO）和长链甘油三酯（LCT）在胶原蛋白肠衣薄膜上的铺展能力最好。SBO 涂层薄膜具有最高的纵向杨氏模量 (YM) 和拉伸强度 (TS) 值，老化后 YM 增加 26%，TS 增加 38%。与未上油的老化薄膜相比，薄膜的上油和老化导致吸水率和收缩率显着降低。还，涂油和老化的薄膜具有较低的水润湿性和较低的平均摩擦系数。FTIR 和 XRD 分析表明，注油降低了胶原蛋白肠衣膜中的三螺旋含量，并在老化后进一步减少。然而，胶原纤维与油分子的结合和交联导致更紧密的结构，这被 SEM 证实。