丝绸
家蚕
丝素
结晶度
傅里叶变换红外光谱
化学
动态力学分析
生物相容性
丝胶
高分子化学
化学工程
聚合物
材料科学
生物化学
复合材料
工程类
冶金
基因
作者
Zhangchuan Peng,Wenbo Hu,Xi Yang,Qingsong Liu,XiaoTing Shi,Xin Tang,Ping Zhao,Qingyou Xia
标识
DOI:10.1016/j.ijbiomac.2024.129780
摘要
Silkworm silk exhibits excellent mechanical properties, biocompatibility, and has potential applications in the biomedical sector. This study focused on enhancing the mechanical properties of Bombyx mori silk by overexpressing three bond-forming active proteins (BFAPs): AFP, HSP, and CRP in the silk glands of silkworms. Rheological tests confirmed increased viscoelasticity in the liquid fibroin stock solution of transgenic silkworms, and dynamic mechanical thermal analysis (DMTA) indicated that all three BFAPs participated in the interactions between fibroin molecular networks in transgenic silk. The mechanical property assay indicated that all three BFAPs improved the mechanical characteristics of transgenic silk, with AFP and HSP having the most significant effects. A synchrotron radiation Fourier transform infrared spectroscopy assay showed that all three BFAPs increased the β-sheet content of transgenic silk. Synchrotron radiation wide-angle X-ray diffraction assay showed that all three BFAPs changed the crystallinity, crystal size, and orientation factor of the silk. AFP and HSP significantly improved the mechanical attributes of transgenic silk through increased crystallinity, refined crystal size, and a slight decrease in orientation. This study opens new possibilities for modifying silk and other fiber materials.
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