Incorporation of gelatin improves toughness of collagen films with a homo-hierarchical structure
Incorporation of gelatin improves toughness of collagen films with a homo-hierarchical structure
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明胶的加入提高了具有同级结构的胶原蛋白膜的韧性
DOI：
10.1016/j.foodchem.2020.128802
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发表时间：
2021-05-30
期刊：
影响因子：
8.8
通讯作者：
Guo, Yang
中科院分区：
文献类型：
--
作者：
Xiao, Jing;Ma, Yunhao;Guo, Yang
在本研究中，将明胶（A型和B型）添加/不添加转谷氨酰胺酶（TGase）添加到胶原纤维膜中以形成分层结构，并研究其对膜的影响。机械性能分析表明，明胶显着提高了胶原膜的韧性，其中含有10wt％A型明胶的膜具有最高的拉伸强度、断裂伸长率和断裂功。然而，TGase 交联极大地损害了 A 型明胶的优点，而 B 型明胶则略有改善，因为它们之间的交联活性存在差异。同时，根据红外傅里叶变换的结果，胶原蛋白和明胶之间形成了氢键。一般来说，预计胶原/明胶膜中形成的分级结构可作为增强胶原基质膜机械性能的有效策略。
In this study, gelatin (type A and type B) with/without transglutaminase (TGase) were added to collagen fiber films to form hierarchical structure and its effects on the film were investigated. The analysis of mechanical properties indicate that gelatin significantly increased the toughness of the collagen film, where the 10 wt% type A gelatin -contained films had highest tensile strength, elongation at break and work of fracture. However, TGase cross-linking compromised the benefits of type A gelatin greatly, while type B gelatin showed a slight improvement, due to the difference in crosslinking activity between them. In the meantime, the hydrogen bonds were formed between the collagen and gelatin according to the results of the Fourier transformation infrared. In general, it is expected that the hierarchical structure formed in the collagen/gelatin films can be used as an effective strategy to enhance the collagen matrix films' mechanical properties.