发光Lyocell纤维的制备

以可再生的α-纤维素为基体,粉末发光颗粒作为添加物,利用Lyocell纤维技术制备出发光性能合格的蓄光型自发光纤维。发光Lyocell纤维继承了稀土铝酸盐粉末优异的发光性能,含10%发光材料的纤维其余辉达到了德国的执行标准(DIN67510),10min余辉亮度>20mcd/m2,60 min余辉亮度>2.8 mcd/m2,而其有效余辉(>0.3 mcd/m2)时间大于10h。与无添加的Lyocell纤维相比,其断裂强度下降了17.6%,断裂伸长率上升了25%。

Fabrication of Luminescent Lyocell Fibers

The present study concerned cellulose spinning solutions prepared using N- methylmorpholine-N-oxide (NMMO) as solvent. These solutions were modified with the lanthanide aluminates long afterglow luminescent material. Such spinning solutions allowed to obtain long afterglow luminescent fibers of the Lyocell type. The luminescent Lyocell fibers inherited the excellent long afterglow capability of lanthanide aluminates. The fibers containing 10 % lanthanide aluminates could achieve Germanic standard, afterglow brightness >20 mcd/m2 in 10 min, >2.8 mcd/m2 in 60 min. Furthermore, the effective afterglow time of the fiber was more than 10 hours. Compared with the non-additional Lyocell fibers, the tensile strength of these luminescent Lyocell fibers decreased by 17.6 %, but the fracture elongation ratio increasd by 25 %.