家蚕中部丝腺的人工拉伸成丝及其结构与性能的研究
Studies on the structures and properties of the silk fibroin fiber prepared from the drawn middle silk gland of Bombyx mori
本文通过人工拉伸家蚕中部丝腺，制备了丝素蛋白纤维，并采用偏光显微镜、拉曼光谱和材料试验机对所得纤维的形态、结构和性能进行了研究。结果表明，蚕体内中部丝腺后段拉伸性能较好，拉伸倍数最高可达300倍，中部丝腺中段次之，而中部丝腺前段拉伸性能相对较差。所得丝素蛋白纤维的直径较天然脱胶蚕丝粗，纤维在偏光下部分出现了双折射现象。另外，经拉伸作用后，部分丝素蛋白分子的构象向β-折叠发生了转变。但是，所得丝素蛋白纤维与天然脱胶蚕丝相比，在结构与性能上仍存在较大差异。
In this paper, silk fibroin (SF) fibers were prepared by artificially drawing the middle silk gland of Bombyx mori. The morphology, structure and properties of the SF fibers were investigated by using polarized microscope, Raman spectroscopy and material testing instrument. It was found that the posterior part of the middle silk gland had a better drawability than the middle part of the middle silk gland and its draw ratio could be up to 300. The anterior part was relatively hard to be drawn. The SF fiber prepared from the drawn middle silk gland had a larger diameter than the natural degummed silk and showed a little birefringence phenomenon. Moreover, some SF molecules in the fibers had a conformational transition to β-sheet after drawing. However, there were still great differences in structures and properties between the natural degummed silk and the SF fibers prepared in this work.
杭怡春、邵惠丽、金媛、胡学超、张耀鹏
生物工程学材料科学
家蚕中部丝腺拉伸丝素蛋白纤维
Bombyx morimiddle silk glanddrawingsilk fibroin fiber
杭怡春,邵惠丽,金媛,胡学超,张耀鹏.家蚕中部丝腺的人工拉伸成丝及其结构与性能的研究[EB/OL].(2011-12-06)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201112-128.点此复制
评论