木薯蚕丝结构与性能表征  

Structure and properties of cassava silk

作　　者：杨莹莹[1] 吕智宁 田伟[1] 祝成炎[1] YANG Yingying LU Zhining TIAN Wei ZHU Chengyan(National Engineering Lab for Textile Fiber Materials and Processing Technology, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,浙江杭州310018

出　　处：《纺织学报》2017年第6期1-5,共5页Journal of Textile Research

基　　金：国家国际科技合作专项项目(2011DFB51570);优秀研究生学位论文培育基金项目(11110932271612)

摘　　要：为研究木薯蚕丝的结构和性能,采用扫描电镜、红外光谱、X射线衍射、力学性能等仪器与测试方法对桑蚕丝、柞蚕丝及木薯蚕丝的结构和性能进行对比研究。结果表明:木薯蚕丝的形貌结构与柞蚕丝相似,木薯蚕丝表面有纵向的条纹及块状或颗粒状的结晶物,横截面面积较大且扁平,而桑蚕丝表面光滑,横截面较圆整;木薯蚕丝与柞蚕丝中存在Ala-Ala-Ala结构,而桑蚕丝不存在,可利用特征吸收峰区分不同品种蚕丝;木薯蚕丝既有α-螺旋结构,又有β-折叠结构,并以β-折叠结构为主,显示出了高度的结晶β-折叠结构;桑蚕丝、柞蚕丝、木薯蚕丝的线密度分别为3.13、6.13、4.18 dtex;木薯蚕丝的断裂强度、断裂伸长率均高于桑蚕丝,与柞蚕丝接近,具有优异的力学性能。To study the structure and properties of cassava silk, the structure and properties of mulberry silk, tussah silk and cassava silk were compared by using scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, mechanical properties test and other test methods. The results show that the morphology structure of cassava silk is similar to tussah silk, and the surface of cassava silk has longitudinal stripes and blocks or granular crystals, and cross section thereof is relatively large and flat, while the surface of mulberry silk is smooth, and its cross section is round, cassava silk and tussah silk have Ala-Ala-Ala structure, but mulberry silk does not have the structure, thus characteristic absorption peaks can be utilized to identify different types of silk; cassava silk has α-helical structure as well as β-sheet structure, which is mainly composed of β-sheet structure of high crystallinity mulberry silk, tussah silk and cassava silk have line density of 3.13, 6.13 and 4.18 dtex, respectively and the breaking strength and elongation at break of cassava silk are higher than those of mulberry silk but near to those of tussah silk, and cassava silk has mechanical properties superior to mulberry silk.

关 键 词：桑蚕丝 柞蚕丝 木薯蚕丝 结构 性能 

分 类 号：TS102.3[轻工技术与工程—纺织工程]