School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China; College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China.
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China.
Int J Biol Macromol. 2017 Nov;104(Pt A):533-538. doi: 10.1016/j.ijbiomac.2017.06.069. Epub 2017 Jun 15.
This paper reports the impacts of direct feeding silkworms with different nanoparticles (Cu, Fe, and TiO) on the morphology, structures, and mechanical properties of the resulting silk fiber (SF). The contents of the Cu nanoparticles were 38 times higher in the posterior silk glands and only 2-3 times higher in the SF and in the middle silk glands compared with the controlled groups. Significant changes of the surface morphology, structures, and diameter of the Cu nanoparticle fed SF have been observed, which are attributed to a slight SF protein reconstruction or conformational change in the mixture of silk fibroin and sericin in the silk glands. The resulting Cu-containing SF exhibits good tensile strength of 360MPa and reaches a strain of 38%, which are 89% and 36% higher than those of the natural SF. This study offers a new green strategy for the easy modification to achieve robust composite SF.
本文报道了直接喂养不同纳米粒子（Cu、Fe 和 TiO）对家蚕形态、结构和力学性能的影响。与对照组相比，后丝腺中 Cu 纳米粒子的含量高 38 倍，而丝纤维（SF）和中丝腺中的含量仅高 2-3 倍。已观察到 Cu 纳米颗粒喂养 SF 的表面形貌、结构和直径发生显著变化，这归因于丝腺中丝素蛋白和丝胶混合物中的 SF 蛋白的轻微重构或构象变化。所得到的含 Cu 的 SF 表现出良好的拉伸强度为 360MPa，达到 38%的应变，分别比天然 SF 高 89%和 36%。本研究为通过简便的修饰来实现稳健的复合 SF 提供了一种新的绿色策略。
