棉纺织技术2026，Vol.54Issue(7)：42-50,9.DOI:10.26967/j.issn1000-7415.202603012
Lyocell凝固丝的结构及其对后拉伸性能的影响
Structure of the Lyocell filament during coagulation process and its impact on the post drawability
崔世强 1朱文祥 2孙丹 2王晓亮 2王心航 2张玉梅 3王亚权4
作者信息
- 1. 天津大学化工工程与技术学院,天津,300072||浙江海利得新材料股份有限公司,浙江 嘉兴,314400
- 2. 浙江海利得新材料股份有限公司,浙江 嘉兴,314400
- 3. 东华大学材料科学与工程学院,上海,201620
- 4. 天津大学化工工程与技术学院,天津,300072
- 折叠
摘要
Abstract
To clarify the structure of Lyocell coagulated filament and its influence on post-drawing property,two-stage drawing process was designed to prepare high-performance Lyocell fiber.A series of Lyocell coagulated filaments were prepared by changing the mass fraction of the coagulation bath.The structural characteristics and extensibility of Lyocell coagulated filaments were analyzed using scanning electron microscopy,X-ray diffraction,birefringence,stress-strain and online stretching methods.The property of Lyocell filaments prepared by two-stage stretching process and one-stage tensile process were compared.The results showed that as the mass fraction of the coagulation bath increased,the solvent mass fraction in the coagulated filaments was increased,forming an ultramolecular structure with smaller grain size,lower crystallinity and orientation degree.However,the elongation at break and the second stage maximum draw ratio of coagulated filaments showed a pattern of increasing first and then decreasing.Under the same total draw ratio,compared with the filaments prepared by one-stage drawing process,the breaking strength of the filaments prepared by the two-stage drawing process was increased by approximately 25%.关键词
Lyocell纤维/凝固丝/断裂伸长率/断裂强度/结构/后拉伸性能Key words
Lyocell fiber/coagulated filament/elongation at break/breaking strength/structure/post-drawing property分类
轻工纺织引用本文复制引用
崔世强,朱文祥,孙丹,王晓亮,王心航,张玉梅,王亚权..Lyocell凝固丝的结构及其对后拉伸性能的影响[J].棉纺织技术,2026,54(7):42-50,9.
