College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Key Laboratory of Leather Cleaner Production, China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Shaanxi University of Science & Technology, Xi'an 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Key Laboratory of Leather Cleaner Production, China National Light Industry, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Shaanxi University of Science & Technology, Xi'an 710021, China.
Int J Biol Macromol. 2024 Oct;277(Pt 2):134184. doi: 10.1016/j.ijbiomac.2024.134184. Epub 2024 Jul 26.
Subject to environmental influences such as temperature, humidity, light, and microorganisms, leather-based relics are easily be deteriorated, which will damage their historical value. In this work, gelatin/tannic acid composites (Gel/TA) was prepared and characterized to investigate their potential as a novel approach for reinforcing and protecting leather-based relics. According to the characterization, it was found that hydrogen bonds was formed between gelatin and TA, and Gel/TA presented increases in the antioxidant capacity(82.12 %), compared to the gelatin. After reinforcing the aged leather with Gel/TA, the cross-linking between leather collagen fibers is more closely interconnected. The mechanical properties and antibacterial activity of leather-based relics are significantly improved. The oxidation resistance of leather-based relics increased from 20.72 % to 63.03 %. Under the condition of accelerated simulated aging, the time to reduce the mechanical properties of reinforced leather by 50 % was extended from 7.6 days to 10 days. At the same time, the color of leather-based relics changed slightly. This result suggested that the Gel/TA composites play an important role in the filling and reinforcement protection of leather artifacts. This work will put forward a feasible way to producing sustainable multifunctional materials for leather-based relics.
受温度、湿度、光照和微生物等环境因素的影响，皮革文物容易劣化，从而损坏其历史价值。在这项工作中，制备了明胶/单宁酸复合材料（Gel/TA）并对其进行了表征，以研究其作为增强和保护皮革文物的一种新方法的潜力。根据表征结果发现，明胶和 TA 之间形成了氢键，并且 Gel/TA 的抗氧化能力（82.12%）比明胶提高。将 Gel/TA 加固老化皮革后，皮革胶原纤维之间的交联更加紧密地相互连接。皮革文物的机械性能和抗菌活性得到显著提高。皮革文物的抗氧化性从 20.72%提高到 63.03%。在加速模拟老化条件下，加固皮革的机械性能降低 50%的时间从 7.6 天延长到 10 天。同时，皮革文物的颜色也略有变化。这一结果表明 Gel/TA 复合材料在皮革文物的填充和增强保护中起着重要作用。这项工作将为生产可持续的多功能皮革文物材料提出一种可行的方法。
