The objective of this study is to reduce environmental pollution caused by waste wool and to enable it to be recycled. L-Cysteine was used to dissolve wool in an aqueous solution for the extraction of keratin. Furthermore, the reconstruction of keratin was attempted by dissolving wool keratin in Na₂CO₃/NaHCO₃ buffer with various contents of polyethylene glycol (PEG)–functionalized graphene oxide (PEG-g-GO). Then, the regenerated keratin/PEG-g-GO composite fibers were wet-spun to form a series of composite fibers. Fourier-transform infrared spectroscopy, XPS analysis, Raman spectroscopy, and thermogravimetric analysis were used to characterize the structure and properties of the composite. The results show that PEG was successfully grafted onto the GO. PEG-g-GO had a good interfacial effect with the keratin matrix in composite fibers without any agglomeration, apart from dispersing evenly. With the addition of PEG-g-GO, the crystallinity and the tensile strength and elongation at break of the composite fiber increased, and it induced more β-sheet secondary conformation within the keratin matrix. When the quality fraction of PEG-g-GO was 0.20%, the tensile strength of the composite fibers reached a maximum (157 ± 40 MPa) and the breaking elongation reached a maximum of 3.9%, which was approximately 168% and 89% higher than that of the pure keratin fibers, respectively. More importantly, the entire process is green and of low cost, which not only reduces environmental pollution but also improves resource utilization.

这项研究的目的是减少废羊毛造成的环境污染并使之可以回收利用。L-半胱氨酸用于将羊毛溶解在水溶液中以提取角蛋白。此外，尝试通过将羊毛角蛋白溶解在Na ₂ CO ₃ / NaHCO ₃缓冲液中，并用各种含量的聚乙二醇（PEG）功能化的氧化石墨烯（PEG- g -GO）来重建角蛋白。然后，再生的角蛋白/ PEG- g将GO复合纤维湿纺以形成一系列复合纤维。使用傅里叶变换红外光谱，XPS分析，拉曼光谱和热重分析来表征复合材料的结构和性能。结果表明PEG成功地接枝到GO上。PEG- g -GO与角蛋白基质在复合纤维中具有良好的界面作用，除了均匀分散外，没有任何团聚。随着PEG- g -GO的加入，复合纤维的结晶度和拉伸强度及断裂伸长率增加，并在角蛋白基质中诱导更多的β-折叠二级构象。当PEG- g的质量分数-GO为0.20％，复合纤维的拉伸强度达到最大值（157±40 MPa），断裂伸长率最大值达到3.9％，比纯角蛋白纤维分别高约168％和89％，分别。更重要的是，整个过程是绿色的，低成本的，这不仅减少了环境污染，而且提高了资源利用率。