School of Food Science and Engineering,, Shaanxi University of Science and Technology, Xi'an, 710021, China.
School of Food Science and Engineering,, Shaanxi University of Science and Technology, Xi'an, 710021, China.
Int J Biol Macromol. 2023 Jun 30;241:124493. doi: 10.1016/j.ijbiomac.2023.124493. Epub 2023 Apr 21.
The abuse of chrome tanning agent in leather processing has caused great harm to human health and the natural environment. We use tremella polysaccharides (TP), lentinan (LNT) and konjac gum (KG) as raw materials, and sodium periodate as oxidant to prepare the corresponding polysaccharide tanning agent. Tremella polysaccharide was selected as the best tanning agent according to the shrinkage temperature, and the subsequent experiments were carried out. Tremella polysaccharide (TP) as raw material and sodium periodate as an oxidant, dialdehyde tremella polysaccharide (DTP) was prepared and applied in leather tanning. The effects of different oxidation conditions (sodium periodate dosage, temperature, pH, and reaction time) on the shrinkage temperature of DTP tanned leather were studied. The change of shrinkage temperature showed that the dosage of sodium periodate had the greatest influence on the shrinkage temperature. Therefore, the effects of different dosage of sodium periodate on the aldehyde content and molecular weight of DTP were investigated, including the analysis of physical properties and microstructure of tanned leather. In general, the increase of sodium periodate dosage was found to increase the aldehyde content and reduce the molecular weight, which was more conducive to leather tanning.
制革过程中滥用铬鞣剂对人类健康和自然环境造成了极大的危害。我们以银耳多糖（TP）、香菇多糖（LNT）和魔芋胶（KG）为原料，以高碘酸钠为氧化剂，制备相应的多糖鞣剂。根据收缩温度选择银耳多糖作为最佳鞣剂，并进行了后续实验。以银耳多糖（TP）为原料，高碘酸钠为氧化剂，制备了双醛银耳多糖（DTP），并将其应用于皮革鞣制中。研究了不同氧化条件（高碘酸钠用量、温度、pH 值和反应时间）对 DTP 鞣革收缩温度的影响。收缩温度的变化表明，高碘酸钠的用量对收缩温度的影响最大。因此，研究了不同高碘酸钠用量对 DTP 醛含量和分子量的影响，包括鞣制皮革物理性能和微观结构的分析。总的来说，发现增加高碘酸钠的用量会增加醛含量，降低分子量，更有利于皮革鞣制。
