不同品种桑蚕牵伸丝的结构与性能  

Structure and properties of forced reeling silks of different varietiesof Bombyx mori silkworms

作　　者：刘术 侯腾[1] 周乐乐 周静 李祥龙[1] 杨斌[1] LIU Shu;HOU Teng;ZHOU Lele;ZHOU Jing;LI Xianglong;YANG Bin(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018

出　　处：《现代纺织技术》2023年第5期125-131,共7页Advanced Textile Technology

基　　金：浙江省自然科学基金项目(LY21E030021)。

摘　　要：利用自主研制的圆锥斜面强制牵伸抽丝装置对不同品种五龄桑蚕进行强制抽丝,通过拉伸测试、傅里叶红外光谱及X射线衍射对不同品种牵伸丝与相应原茧丝的结构与性能进行表征与分析。结果表明:两种牵伸丝的力学性能均优于其对应茧丝,黄色雄蚕牵伸丝的力学性能更佳,其初始模量、断裂强度、断裂比功与伸长率的平均值分别为117.35、4.55、0.75 cN dtex与26.54%。牵伸作用会导致丝纤维晶粒尺寸减小、结晶度提高,从而赋予丝纤维更为优异的力学性能。As people pay more attention to ecological environment and health,the demand for high mechanical properties,good biocompatibility and biodegradable fiber materials is increasing in various industries.Bombyx mori silkworm silk is a well-known natural protein fiber,and is considered as an ideal biomaterial because of its excellent properties,such as outstanding toughness,safety degradability,and good compatibility with human body.Mulberry silk fibers have an interesting and elaborate structure,but its mechanical properties are inferior to spider dragline silk.Therefore,it is of great significance to prepare mulberry silk comparable to spider silk.Traditional silk processing technology,however,is difficult to enhance the performance of cocoon silk,and even damage its morphology and properties.In addition,artificial silk produced by a variety of spinning methods cannot fully replicate the properties of natural silk.Herein,we obtained two different force-reeled silks from white cocoon male silkworms and yellow cocoon male silkworms with the same reeling speed using a conical forced reeling device.The mechanical properties and internal structure of the force-reeled silks were analyzed to elucidate the effect of forced reeling on the silk fibers.In this study,the silkworms were forcibly reeled at 4 cm s,resulting in the force-reeled silks(WM-4 and YM-4).During forced reeling,the silk was fully stretched due to a recombination of the reeling force and the gravity of silkworm,which increased the orientation and crystallinity of force-reeled silk fibers.Meanwhile,the cocoon silk fibers(WM-0 and YM-0)selected from the same batch were set as a control group.In addition,the characteristics of fiber fineness,mechanical properties,FTIR,XRD of all silk samples were performed.The result shows that the fineness of the force-reeled silk fibers decreases with the increase of the force-reeled speed.The mechanical properties including elongation,strength initial modulus,and specific work of rupture of force-reeled silk fibers are supe

关 键 词：桑蚕丝 强制抽丝 力学性能 二级结构 彩色蚕丝 

分 类 号：TS102.3[轻工技术与工程—纺织工程] TS143.2[轻工技术与工程—纺织科学与工程]