Ma Jianzhong, Shen Yiming, Yao Han, Fan Qianqian, Zhang Wenbo, Yan Hongxia
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China.
Int J Biol Macromol. 2025 Jan;287:138564. doi: 10.1016/j.ijbiomac.2024.138564. Epub 2024 Dec 9.
The utilization of chromium free tanning agents generates lots of pollutants such as chromium containing wastewater and sludge. Besides, trivalent chromium may be converted into carcinogenic hexavalent chromium under certain conditions, causing permanent harm to the human body. Therefore, the promotion of chromium free tanning technology is extremely significant. In this study, it reports a green strategy to build a novel tanning system via the amination of collagen fibers. Leather collagen was aminated by diethanolamine to improve the positive charge and number of amino groups. This allowed the regulation of functional groups in collagen fibers and enabled the high employment of aldehyde tanning agents. On this matter, experimental work combined with molecular dynamics simulation was used to investigate the enhancement mechanism of amination. Collagen fibers aminated by diethanolamine achieved better aldehyde tanning effect than untreated collagen fibers, such as a higher shrinkage temperature (87.5 °C), dyeing absorption (74.6 %), and lower free formaldehyde content (160.8 mg/kg). This work provided a novel strategy for the establishment of a green and efficient chromium free tanning system.
无铬鞣剂的使用会产生大量污染物，如含铬废水和污泥。此外，三价铬在某些条件下可能会转化为致癌的六价铬，对人体造成永久性伤害。因此，推广无铬鞣制技术具有极其重要的意义。在本研究中，报道了一种通过胶原纤维胺化构建新型鞣制体系的绿色策略。皮革胶原蛋白用二乙醇胺进行胺化，以提高正电荷和氨基数量。这使得能够调节胶原纤维中的官能团，并实现醛鞣剂的高利用率。在此方面，结合分子动力学模拟的实验工作用于研究胺化的增强机制。经二乙醇胺胺化的胶原纤维比未处理的胶原纤维具有更好的醛鞣效果，如更高的收缩温度（87.5℃）、染色吸收率（74.6%）和更低的游离甲醛含量（160.8mg/kg）。这项工作为建立绿色高效的无铬鞣制体系提供了一种新策略。
