摘要
用扫描电子显微镜(SEM)观察了吐丝前与吐丝中蚕腺体内丝素蛋白溶液的形态,并用拉曼光谱进一步表征了丝素分子的构象。由此可以推论,丝素蛋白在腺体内存在球状物逐渐溶合为丝素溶液的熟化过程,这导致溶液的黏度逐渐降低,并出现液晶现象。研究结果进一步表明,丝纤维的β折叠构象并不完全是由蚕在吐丝时的剪切和拉伸作用形成的,蚕中部丝腺前段内的丝素溶液内已形成一定量的β折叠构象。
The paper studies the morphology and conformation of silk fibroin solution in the gland eforeand during spinning with Scanning Electron Microscopy (SEM) and Roman spectrum.It deduces from theresults that the spherical fibroin in the glands dissolves into solution gradually, which results inthe solution viscosity decreases step by step and liquid crystalline phenomenon appears. And the sultsfurther show that the shear and drawing action during spinning is not the only factor that deduces βtransition, but someβconformation forms in the fibroin solution in the anterior part of the middledivision of the glands.
出处
《丝绸》
CAS
北大核心
2004年第6期16-19,共4页
Journal of Silk
基金
国家"863"项目(No.2002AA336060)
