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林产化学与工业

林产化学与工业 ›› 2011, Vol. 31 ›› Issue (6): 11-14.

• 研究报告 • 上一篇    下一篇

离子液体中制备纳米TiO2/纤维素复合纤维及产物的光催化性能

马英冲, 李坤兰, 尉志苹, 魏立纲, 杜静, 杨海静   

  1. 大连工业大学 化工与材料学院, 辽宁 大连 116034
  • 收稿日期:2011-04-02 修回日期:1900-01-01 出版日期:2011-12-30 发布日期:2011-12-30
  • 通讯作者: 魏立纲(1972-),男,辽宁大连人,讲师,博士,从事生物质资源与技术研究;E-mail:wei_ligang@hotmail.com。

Preparation of Nano-TiO2/Cellulose Composite Fiber in Ionic Liquid and Its Photolytic Activities

MA Ying-chong, LI Kun-lan, WEI Zhi-ping, WEI Li-gang, DU Jing, YANG Hai-jing   

  1. School of Chemistry Engineering & Material,Dalian Polytechnic University, Dalian 116034, China
  • Received:2011-04-02 Revised:1900-01-01 Online:2011-12-30 Published:2011-12-30

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摘要： 纳米TiO2/纤维素的复合纤维可以用于纺织、材料和催化等领域。在1-丁基-3-甲基咪唑氯盐(Cl)离子液体中,将纳米TiO2粉末与纤维素浆粕共混,采用湿法成型技术制备不同含量的纳米TiO2/纤维素纤维复合纤维。通过力学测试、傅立叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)对所得复合纤维的力学性能、形貌和结构等进行表征;以亚甲基蓝为模型物,对其光催化性能进行测试。结果表明,TiO2质量分数对复合纤维的形貌和性能影响显著,随TiO2质量分数由 2 % 增大至 16.7 %,复合纤维的断裂强度降低,初始模量由 0.139 cN/dtex 降至 0.077 cN/dtex,光催化性能先降低而后增强,其中含TiO2 16.7 % 的复合纤维催化性能较强。以Cl离子液体为介质,湿法纺丝制备有光催化活性纳米TiO2/纤维素纤维的方法是可行的;综合考虑,含TiO2 2.0 % 的复合纤维性能较佳。

关键词: 离子液体, 纳米TiO2, 纤维素纤维, 复合材料

Abstract: Nano-TiO2/cellulose composite fiber can be widely employed in the processes of textile, material and catalysis, etc. In this work, nano-TiO2 powder was blended with a solution of cellulose/1-butyl, 3-methylimidazolium chloride (Cl) ionic liquid. The cellulose composite fibers with different nano-TiO2 content were prepared using wet molding technology. The me-chanical property, morphology and structure of the prepared fiber were further characterized through mechanical testing, scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FT-IR), respectively. Photolytic performance of the composities was also investigated with methylene blue as model compound. The results indicate that the nano-TiO2 content significantly influences the property and morphology of the prepared composite fiber. With increasing nano-TiO2 content from 2.0 % to 16.7 %, the breaking strength decreases, the initial modulus decreases from 0.139 cN/dtex to 0.077 cN/dtex, but the photoly-tic activity descends first and then ascends. The composite fibers with nano-TiO2 16.7 % have a better photplytic activity. The optimized nano-TiO2 content is 2 %.

Key words: ionic liquid, nano-TiO2, cellulose fiber, composite

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