摘要
为研究热水对棉纤维结构和性能的影响,采用高温热水对棉纤维进行处理,探讨水温和作用时间对棉纤维拉伸、表面摩擦和热稳定性能的影响规律,并使用扫描电镜、红外光谱和X射线衍射技术分析热水处理前、后棉纤维的表面形貌、分子结构、结晶度和取向度。结果表明,棉纤维经过热水处理之后,导致棉纤维的结晶度和取向度下降,断裂强度和断裂伸长率会不同程度地下降,反应温度越高,反应时间越长,下降越为明显;由于棉纤维经热水处理后变得柔软圆润,天然转曲减少,棉纤维的静态和动态摩擦系数有所减小;热水处理对棉纤维的分子结构和热稳定性能影响不大。
The cotton fibers were treated with hot water under high temperature condition in order to investigate the effect of hot water on the structures and properties of cotton fibers. The effects of water temperature and action time on the tensile, surface friction, and thermal stability properties of cotton fibers were investigated. The surface morphology, molecular structure, crystallinity and orientation of cotton fibers before and after hot water treatment were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction techniques. The experiment results show that after hot water treatment, the tensile strengths and elongations at break of cotton fibers decrease to some extent, and a further decrease occurs as water temperature and action time rise. This is due to the losses of crystallization and orientation of cotton fibers. The static and dynamic friction coefficients of cotton fibers decrease because the cotton fibers become soft and round, and meanwhile the natural convolutions decrease. However, the hot water has little effect on the molecular structure and thermal stability of cotton fibers.
作者
薛海军
张辉
王红红
XUE Haijun;ZHANG Hui;WANG Honghong(School of Textile Science & Engineering, Xi′an Polytechnic University, Xi′an 710048, China;Cooperative Innovational Center for Technical Textiles, Xi′an Polytechnic University, Xi′an 710048, China)
出处
《西安工程大学学报》
CAS
2019年第1期1-7,共7页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金(51873169)
关键词
棉纤维
热水处理
拉伸性能
表面摩擦
热稳定性
cotton fibers
hot water treatment
tensile property
surface friction
thermal stability
