Preparation, Characterization and Application of Lubricating Protein Filler for Sustainable Leather Production

ABSTRACT

In this study, collagen hydrolyzate was obtained from bovine shaving wastes of leather production with the alkali hydrolysis reaction. Total amino acid, total carbon and total nitrogen amounts of liquid collagen hydrolyzate (CH) were determined. Fourier-transform infrared spectroscopy (FTIR) characterization of collagen hydrolyzate was performed. Obtained CH was emulsified with hydrogenated castor and amino functional silicone oils to prepare lubricating protein filler (LPF). Particle size and zeta potential of the LPF were analyzed. 10%, 15%, and 20% LPF was used in the retanning/fatliquoring process of chromium tanned bovine leathers. Performance characterizations of leathers treated with LPFs were carried out with tensile strength, tear strength, filling efficiency, light fastness, shrinkage, and denaturation temperature analyses. Moreover, bounded fat content in leather was also determined. Results showed the increased thermal stability, strength performance and good filling effect in leather by application of the prepared LPF. Consequently, LPF had a good potential as natural retanning/fatliquoring agent via achieving reuse of the solid leather wastes and providing satisfactory leather properties and cleaner production by one product itself.

摘要

本研究以皮革生产中的牛剃须废料为原料，采用碱水解反应制备胶原蛋白水解物. 测定液体胶原蛋白水解物(CH)的总氨基酸、总碳、总氮含量. 对胶原水解产物进行了傅立叶变换红外光谱(FTIR)表征. 以氢化蓖麻油和氨基功能硅油为乳化剂，制备了胶原蛋白水解物 (LPF). 分析了润滑蛋白填料的粒径和电位. 用10%、15%、20%的润滑蛋白填料对铬鞣牛皮革进行复鞣加脂. 对经润滑蛋白填料处理的皮革进行了拉伸强度、撕裂强度、填充效率、耐光牢度、收缩率和变性温度等性能表征. 此外，还测定了皮革中的有限脂肪含量. 结果表明，所制备的润滑蛋白填料能提高皮革的热稳定性、强度性能和良好的填充效果. 因此，润滑蛋白填料具有良好的潜力，作为天然复鞣/加脂剂，通过实现固体皮革废物的再利用，并提供令人满意的皮革性能和清洁生产的一个产品本身.

KEYWORDS:

• Leather
• shaving waste
• collagen hydrolyzate
• emulsion
• retanning
• fatliquoring

关键词:

• 皮革
• 剃须浪费
• 胶原蛋白水解物
• 乳状液
• 复鞣
• 加脂