Abstract In this research, keratin was extracted from the waste wool fiber using sodium sulfite as dissolving agent. The reaction results showed that the optimum conditions were as follows: the dosage of sodium sulfite 30 g/L, the sodium hydroxide 6 g/L, the sodium dodecyl sulfate (SDS) 10 g/L and in 90 °C for 3 h. Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and SDS-polyacrylamide gel electrophoresis were used to characterize the properties of regeneration keratin. Compared with the wool fiber, the regenerated keratin retains its chemical structure and thermal stability.

中文翻译：

---

硫化钠体系溶解回收废羊毛的研究

摘要 本研究以亚硫酸钠为溶解剂，从废羊毛纤维中提取角蛋白。反应结果表明，最佳反应条件为：亚硫酸钠30 g/L、氢氧化钠6 g/L、十二烷基硫酸钠（SDS）10 g/L，90℃反应3 h。傅里叶变换红外光谱、X射线衍射、热重分析和SDS-聚丙烯酰胺凝胶电泳被用来表征再生角蛋白的性质。与羊毛纤维相比，再生角蛋白保留了其化学结构和热稳定性。