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通过将亲水改性天然动、植物油脂(菜籽油和鱼油)中加入纳米前驱体(硅酸酯),制备了纳米复合鞣剂。测定了纳米复合鞣剂的稳定性以及分散载体的乳化和耐酸耐电解质稳定性,并测定了纳米复合鞣剂鞣制的成革的热稳定性和柔软性。最后用生化呼吸曲线法和BOD5/COD法定性分析,纳米复合鞣剂在活性污泥作用下的好氧生物降解特性,同时用降解5d的COD及TOC去除率,定量表征纳米复合鞣剂的生物降解性。试验结果表明:分散载体的乳化及耐酸耐电解质性能较好,纳米复合鞣剂的稳定性好;1000mg/L的纳米复合鞣剂溶液生化呼吸曲线在内源呼吸线之上、BOD5/COD值大于0.45、降解5d后的COD去除率为93.45%、TOC去除率为89.08%,表明纳米复合鞣剂的生物降解性能良好,是一种环境友好的鞣革材料。
Nanocomposite tanning agents were prepared by adding nano-precursors (silicate) to hydrophilically modified natural animal and vegetable oils (rapeseed oil and fish oil). The stability of the nanocomposite tanning agent and the emulsification and acid and electrolyte stability of the dispersion carrier were measured. The thermal stability and softness of tanning tanning leather were also determined. Finally, using biochemical respiration curve method and BOD5 / COD qualitative analysis, the nanocomposite tanning agent under the action of activated sludge aerobic biodegradation characteristics, at the same time with the degradation of 5d COD and TOC removal rate, quantitative characterization of nanocomposite tannin biological Degradability. The results showed that the dispersed carrier had better emulsification and acid-resistant electrolyte resistance, and the stability of nanocomposite tanning agent was good. The biochemical respiration curve of nanocomposite tannage solution at 1000mg / L was above the endogenous respiration line, and the BOD5 / COD value was greater than 0.45. After 5 days of degradation, the removal rate of COD was 93.45% and the removal rate of TOC was 89.08%, indicating that the nanocomposite tanning agent has good biodegradability and is an environmentally friendly tanning material.