Faculty of Engineering, Department of Leather Engineering, Ege University, 35100 Bornova, Izmir, Turkey.
Faculty of Engineering, Department of Leather Engineering, Ege University, 35100 Bornova, Izmir, Turkey.
Int J Biol Macromol. 2019 Feb 1;122:610-618. doi: 10.1016/j.ijbiomac.2018.10.217. Epub 2018 Nov 4.
High molecular weight/size and poor solubility of native starch seems to be preliminary drawbacks in its possible use in leather processing as a tanning/retanning agent. For this purpose, firstly the native starch which has too large molecular size to penetrate between skin fiber matrix was oxidized with HO in different molar ratios for disintegrating into appropriate molecular size that can be used in tanning process. Then, the product yields, water solubilities and degree of substitutions of oxidized starches were determined. Also, the oxidized starch samples were characterized by Fourier Transforms Infrared (FT-IR) Spectroscopy, Gel Permeation Chromatography (GPC) and Proton Nuclear Magnetic Resonance (H NMR) Spectroscopy. According to the GPC results, the oxidized starch samples which their molecular weights were reduced for penetrating into skin fibers were selected and they were used in tanning process of goat skins. The tanning effects of selected oxidized starches were evaluated according to shrinkage temperatures, filling coefficients and Scanning Electron Microscopy (SEM) analysis. From the results, it was revealed that the native corn starch can be oxidized with HO in a controlled manner and oxidized starch can be utilized as a tanning/retanning agent in leather making.
天然淀粉的高分子量/尺寸和较差的溶解性似乎是其在皮革加工中用作鞣剂/复鞣剂的初步缺点。为此，首先将天然淀粉用 HO 在不同摩尔比下氧化，以将其分解成适当的分子尺寸，使其能够用于鞣制过程，从而破坏太大的分子尺寸，无法穿透皮纤维基质。然后，测定氧化淀粉的产率、水溶性和取代度。此外，通过傅里叶变换红外（FT-IR）光谱、凝胶渗透色谱（GPC）和质子核磁共振（H NMR）光谱对氧化淀粉样品进行了表征。根据 GPC 结果，选择了分子量降低以穿透皮纤维的氧化淀粉样品，并将其用于山羊皮的鞣制过程。根据收缩温度、填充系数和扫描电子显微镜（SEM）分析，评估了所选氧化淀粉的鞣制效果。结果表明，天然玉米淀粉可以用 HO 进行控制氧化，氧化淀粉可以用作皮革制造中的鞣剂/复鞣剂。
