Zhang Xinping, Sorolla Sílvia, Casas Concepció, Bacardit Anna
A3 Leather Innovation Center, Escola Politècnica Superior, Departament d'Informàtica i Enginyeria Industrial, Universitat de Lleida (UdL), 25003 Lleida, Spain.
Gels. 2023 Nov 8;9(11):883. doi: 10.3390/gels9110883.
Leather finishing is a critical process in the leather industry, as it significantly influences the final appearance, durability, and quality of leather products. Traditional leather finishing techniques often involve the use of synthetic chemicals, which may lead to environmental concerns and potential health hazards. In this study, we investigate the feasibility and effectiveness of a new collagen-based product for leather finishing. Collagen, a natural protein found abundantly in animals, has shown promise as an environmentally friendly and sustainable alternative for leather finishing. The new collagen gel product obtained from bovine hide waste by using an alkaline extraction method with lime was functionalized through an enzymatic treatment that allows to achieve a finishing product suitable for coating formulations, and at the same time, a biodegradable finishing. The collagen gel product was optimized by varying parameters, such as temperature, pH, and enzyme quantity. The optimized collagen gel product exhibits a wide particle size range and retains the triple-helical structure of collagen. The leather samples treated with the collagen gel product show enhanced properties compared to those with conventional finishes. The results show that the collagen gel product enhances water vapor permeability, color stability, and touch in the finishes. However, a low resistance to wet rubbing is obtained; therefore, it is necessary to study how to improve this parameter.
皮革涂饰是皮革工业中的一个关键工序，因为它对皮革制品的最终外观、耐用性和质量有重大影响。传统的皮革涂饰技术通常涉及使用合成化学品，这可能会引发环境问题和潜在的健康危害。在本研究中，我们探究了一种新型胶原基产品用于皮革涂饰的可行性和有效性。胶原蛋白是一种在动物体内大量存在的天然蛋白质，已显示出作为皮革涂饰的环保且可持续替代品的潜力。通过使用石灰碱性萃取法从牛皮废料中获得的新型胶原蛋白凝胶产品，通过酶处理进行功能化，从而得到一种适用于涂料配方的涂饰产品，同时实现可生物降解的涂饰效果。通过改变温度、pH值和酶量等参数对胶原蛋白凝胶产品进行了优化。优化后的胶原蛋白凝胶产品呈现出较宽的粒径范围，并保留了胶原蛋白的三螺旋结构。与使用传统涂饰剂处理的皮革样品相比，用胶原蛋白凝胶产品处理的皮革样品表现出更优的性能。结果表明，胶原蛋白凝胶产品提高了涂饰层的透湿性、颜色稳定性和触感。然而，其耐湿摩擦性能较低；因此，有必要研究如何改善这一参数。
