Shakil Saidur Rahman, Zenith Fatema Tuz Johura, Khan Mahabubur Rahman, Tonay Waliur Rahman
Department of Leather Engineering, Institute of Leather Engineering and Technology, University of Dhaka, Dhaka, 1209, Bangladesh.
Institue of Leather Engineering and Technology, University of Dhaka, Dhaka 1209, Bangladesh.
Heliyon. 2024 Aug 23;10(17):e36270. doi: 10.1016/j.heliyon.2024.e36270. eCollection 2024 Sep 15.
This study investigated the viability of locally available organic sources of leaf as vegetable tannin agent in leather processing to promote green leather manufacturing. Leather tanned with leaf powder (NPT), extract (NET) and conventional vegetable tanned leather (CVT) was characterized with FTIR, DLS, HPLC, DSC, TGA, and SEM. Total soluble solid, pH, tannin content, and tanning strength of leaf extract were found to be 24 %, 4.81, 12.34 % and 1.81 respectively. Moisture content, fat content, and water-soluble content of leaf extract tanned leather (NET) were 12.26 %, 10.8 % and 7.2 % respectively. The shrinkage temperature, tensile strength, stitch tear strength, grain crack load, and finished film bond strength of NET leather were 86 °C, 282.52 kg/cm, 139.53 kg/cm, 24 kg, and 414 g/cm respectively. NET leather exhibited better anti-microbial sensitivity against , , and than NPT and NET leather. Overall, the experimental results of this study indicate the leaf could serve as a prime renewable tanning agent, substituting hazardous chromium and imported conventional vegetable tannin chemicals in leather manufacturing. Thus, developed leaf tannin material from plant sources could provide sustainable leather production, contributing to eco-friendly and viable green leather processing options.
本研究调查了皮革加工中当地可得的有机树叶来源作为植物单宁剂以促进绿色皮革制造的可行性。用树叶粉末（NPT）、提取物（NET）鞣制的皮革以及传统植物鞣制皮革（CVT）通过傅里叶变换红外光谱（FTIR）、动态光散射（DLS）、高效液相色谱（HPLC）、差示扫描量热法（DSC）、热重分析（TGA）和扫描电子显微镜（SEM）进行了表征。发现树叶提取物的总可溶性固形物、pH值、单宁含量和鞣制强度分别为24%、4.81、12.34%和1.81。用树叶提取物鞣制的皮革（NET）的水分含量、脂肪含量和水溶性含量分别为12.26%、10.8%和7.2%。NET皮革的收缩温度、拉伸强度、缝线撕裂强度、粒面裂纹负荷和成品膜粘合强度分别为86℃、282.52kg/cm、139.53kg/cm、24kg和414g/cm。NET皮革对大肠杆菌、金黄色葡萄球菌和白色念珠菌表现出比NPT和CVT皮革更好的抗菌敏感性。总体而言，本研究的实验结果表明树叶可作为主要的可再生鞣剂，在皮革制造中替代有害的铬和进口传统植物单宁化学品。因此，从植物来源开发的树叶单宁材料可以提供可持续的皮革生产，有助于实现环保且可行的绿色皮革加工方案。
