摘要
拉伸细化技术可使纤维的微结构发生转变.利用拉曼光谱技术研究经亚硫酸盐预处理、不同拉伸率下(0,20%,40%,60%)马海毛纤维二级结构的转变.通过对马海毛纤维酰胺Ⅰ带的拟合分峰分析可以得出,拉伸使马海毛纤维大分子的二级结构由α-螺旋向β-折叠结构转变,且随着拉伸率的增加,α→β结构的转变幅度明显降低,高拉伸率下主要发生纤维微结构的滑移;通过对酰胺Ⅲ带和C—C骨架振动的分析同样表明,拉伸过程中α-螺旋转变为β-折叠结构;马海毛纤维被明显细化.
The essence of slenderization technology is to make fiber microstructure transformed to achieve refinement. Raman spectroscopy was used to investigate the secondary structure changes of sulphite pretreated mohair fibers with stretching ratios at 0, 20%, 40% and 60%. Through the curve-fitting method of the amide I region implied that the secondary structure of stretched mohair fibers was mainly transformed from a-helical structure to β-pleated-sheet structure during the stretching process, when increased the stretching ratios, the range of a→β transformation significantly decreased, when at high stretching ratios, the mechanism of stretching mainly relied on the slippage of the fiber micro-structure. Analysis of the amide Ⅲ band and the C--C skeletal vibration region also revealed that a-helical structure converted to β-pleated-sheet structure during the stretching process. Mohair fibers were obviously refinement.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期31-36,共6页
Journal of Donghua University(Natural Science)
关键词
拉伸细化
拉曼光谱
拉伸率
马海毛
二级结构
滑移
slenderization
Raman spectroscopy
stretching ratio
mohair
secondary structure
slippage
