长余辉发光再生纤维素纤维的制备

Preparation of long-afterglow luminescent regenerated cellulose fiber

对稀土铝酸锶长余辉粉末采用硅烷偶联剂进行包覆处理,增强了稀土铝酸锶粉末在水性溶液中的稳定性。以包覆处理过的稀土铝酸锶粉末为添加剂,以新型碱体系制备的再生纤维素为基材,通过湿法纺丝,制备出长余辉发光再生纤维素纤维。借助傅里叶红外光谱仪、扫描电镜、X射线衍射仪、单纤维强力测试仪、余辉亮度测试仪对样品的性能进行表征,结果表明:偶联剂通过化学键Si—O—Al包覆在稀土铝酸锶粉末上;经过偶联剂处理后,发光纤维的外观形貌较为光滑,直径约为60μm;纤维中稀土铝酸锶结构和纤维素Ⅱ结构同时出现,二者没有相互影响;纤维力学强度提高了10%;余辉初始亮度为0.82 cd/m^2。

Silane coupling agent（ KH-570） was used to modify rare-earth strontium aluminate luminescent powder, which has good stability in aqueous solution. The long-afterglow luminescent regenerated cellulose fibers were prepared from regenerated cellulose fibers（ prepared from novel Na OH /thiourea / urea solvent system） and the treated rare earth strontium aluminate powder as an additive by wet spinning. The luminescent fiber samples were characterized by Fourier transmission infrared spectroscopy,scanning electron microscope,X-ray diffraction a tensile tester,and a long-afterglow luminescent tester,respectively. The experimental results showed that the coupling agent was coated on the rare-earth strontium aluminate powder by Si—O—Al chemical bonds. After the coupling process,the luminescent fiber had smooth appearance and the diameter was about 60 μm. The structure of rare-earth strontium aluminate and cellulose II appeared in the fiber at the same time,which were not affected by each other. Tensile properties increased by 10%. The initial luminescent intensity was 0. 82 cd / m2.