氯化铵改性Lyocell纤维的研究——(Ⅱ)氯化铵对Lyocell纤维结构与性能的影响  

THE INVESTIGATION OF THE LYOCELL FIBERMODIFIED BY AMMONIUM CHLORIDE——(Ⅱ) THE INFLUENCE OF AMMONIUM CHLORIDE ON THESTRUCTURE AND PROPERTIES OF LYOCELL FIBERS

作　　者：彭顺金[1] 邵惠丽[1] 胡学超[1] 

机构地区：[1]纤维材料改性国家重点实验室,东华大学上海200051

出　　处：《高分子材料科学与工程》2005年第5期102-105,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(20074005);教育部科学技术重点资助项目(00060)

摘　　要：在纤维素/NMM O.H2O溶解纺丝体系中,氯化铵改性得到的Lyoce ll纤维的结晶结构为纤维素Ⅱ和Ⅲ的混合结晶结构;在相同的纺丝条件下,少量氯化铵存在可以明显改善Lyoce ll纤维的力学性能,对于平均聚合度为818的棉浆纺丝液(纤维素质量分数为9%),加入0.5%的氯化铵(以纺丝液质量为基准)时,得到的Lyoce ll纤维拉伸强度比未加氯化铵时提高约30%。通过研究氯化铵对最终Lyoce ll纤维结构与性能的影响,提出了氯化铵改善Lyoce ll纤维力学性能的机理模型。A mechanism why ammonium chloride can improve the mechanical properties of Lyocell fibers has been studied. The effects of ammonium chloride, which is used as a modifier, on the structure and properties of Lyocell fibers which are prepared by cellulose/NMMO·H2O spinning system were investigated. The results show that the effect of draw ratio on the structure and mechanical properties of Lyocell fibers modified by NH4Cl is different from those of common Lyocell. The crystal form of this Lyocell is a mixture of cellulose Ⅱ and Ⅲ. It is found it can remarkably improve the mechanical properties for adding amount of NH4Cl into system. For the cotton cellulose/NMMO·H2O solution （cellulose mass percentage 9%, DP^- 818）, the tenacity of Lyocell can increase 30% when adding 0.5% NH4Cl into the system.

关 键 词：纤维素纤维 Lyocell改性 结构与性能 

分 类 号：O631.11[理学—高分子化学]