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-甲基咪唑氧盐([ BMIM] Cl)离子液体中,将纳米TiO2粉末与纤维素浆柏共混,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TiO216.7％的复合纤维催化性能较强.以[BMIM] Cl离子液体为介质,温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.%Nano-TiO2/cellulose composite fiber can be widely employed in the processes of textile, material and catalysts, etc. In this work, nano-Ti02 powder was blended with a solution of cellulose/1 -butyl, 3-methylimidazolium chloride ( [ BMIM]Cl) ionic liquid. The cellulose composite fibers with different nano-TiO2 content were prepared using wet molding technology. The mechanical 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. Tin- 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 photolytic 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 %.
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