College of Agriculture, Anshun University, Anshun 561000, China.
College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
Molecules. 2024 Apr 27;29(9):2023. doi: 10.3390/molecules29092023.
The various wastes generated by silkworm silk textiles that are no longer in use are increasing, which is causing considerable waste and contamination. This issue has attracted widespread attention in countries that use a lot of silk. Therefore, enhancing the mechanical properties of regenerated silk fibroin (RSF) and enriching the function of silk are important directions to expand the comprehensive utilization of silk products. In this paper, the preparation of RSF/AlO nanoparticles (NPs) hybrid fiber with different AlO NPs contents by wet spinning and its novel performance are reported. It was found that the RSF/AlO NPs hybrid fiber was a multifunctional fiber material with thermal insulation and UV resistance. Natural light tests showed that the temperature rise rate of RSF/AlO NPs hybrid fibers was slower than that of RSF fibers, and the average temperature rose from 29.1 °C to about 35.4 °C in 15 min, while RSF fibers could rise to about 40.1 °C. UV absorption tests showed that the hybrid fiber was resistant to UV radiation. Furthermore, the addition of AlO NPs may improve the mechanical properties of the hybrid fibers. This was because the blending of AlO NPs promoted the self-assembly of β-sheets in the RSF reaction mixture in a dose-dependent manner, which was manifested as the RSF/AlO NPs hybrid fibers had more β-sheets, crystallinity, and a smaller crystal size. In addition, RSF/AlO NPs hybrid fibers had good biocompatibility and durability in micro-alkaline sweat environments. The above performance makes the RSF/AlO NPs hybrid fibers promising candidates for application in heat-insulating and UV-resistant fabrics as well as military clothing.
各种废弃的不再使用的丝绸纺织品日益增多，造成了相当大的浪费和污染。这一问题在丝绸使用大国引起了广泛关注。因此，提高再生丝素蛋白（RSF）的机械性能和丰富丝素的功能是扩大丝绸产品综合利用的重要方向。本文报道了通过湿法纺丝制备不同 AlO NPs 含量的 RSF/AlO NPs 纳米复合纤维及其新颖性能。结果表明，RSF/AlO NPs 纳米复合纤维是一种具有隔热和抗紫外线功能的多功能纤维材料。自然光照射试验表明，RSF/AlO NPs 纳米复合纤维的升温速率比 RSF 纤维慢，在 15 min 内，纤维的平均温度从 29.1°C上升到约 35.4°C，而 RSF 纤维可上升到约 40.1°C。紫外线吸收试验表明，复合纤维具有抗紫外线辐射的能力。此外，AlO NPs 的添加可能会提高复合纤维的机械性能。这是因为 AlO NPs 的添加以剂量依赖的方式促进了 RSF 反应混合物中β-折叠的自组装，表现为 RSF/AlO NPs 纳米复合纤维具有更多的β-折叠、结晶度和更小的晶体尺寸。此外，RSF/AlO NPs 纳米复合纤维在微碱性汗液环境中具有良好的生物相容性和耐久性。上述性能使 RSF/AlO NPs 纳米复合纤维有望成为隔热和抗紫外线织物以及军用服装的应用候选材料。
