离心纺丝制备TiO_2/PVDF微纳米复合纤维及其染料降解性能

Preparation of TiO_2/PVDF micro-nano composite fiber by centrifugal spinning and dye degradation properties

为了降解印染废水中的染料,将二氧化钛(TiO_2)与聚偏氟乙烯(PVDF)添加至N,N-二甲基甲酰胺(DMF)和丙酮的混合溶液中制备纺丝液,通过离心纺制备具有光催化降解性能的TiO_2/PVDF纤维。利用场发射扫描电镜(FESEM)观察纤维的表面形态,采用光化学反应仪测试复合纤维光催化降解染料性能,运用紫外可见分光光度计分析染料的降解情况。研究结果表明:复合纤维表面TiO_2的负载量随TiO_2质量浓度的增大而增大;当纺丝液中TiO_2与PVDF的质量浓度百分比为6∶10时,离心纺纺制出的TiO_2/PVDF复合纤维对染液的脱色率最高,对亚甲基蓝、罗丹明B、酸性黑10B都具有良好的降解效果,同时该复合纤维具有良好的可重复使用性。

In order to degrade the dye in printing and dyeing wastewater, titanium dioxide （TiO2） nanopartieles and polyvinylidene fluoride （PVDF） were added into the mixed solution of N, N dimethylformamide （DMF） and acetone to prepare spinning solution. TiO2/PVDF fibers with photocatalytic degradation performance were prepared through centrifugal spinning. Then, the morphology of TiO2/PVDF fibers was characterized by field emission scanning electron microscope （FESEM） and the photocatalytic degradation performance of fibers was tested by a photochemical reaction instrument. The ultraviolet visible spectrophotometer was used to analyze the degradation of the dye. The results showed that the load of TiO2 on the surface of the composite fiber increased with the increase of TiO2 concentration. When the mass concentration percentage of TiO2and PVDF was 6 ： 10, TiO2/PVDF fibers showed the highest decoloring rate for the dye liquid, and had the good degradation effect on methylene blue, rhodamine B and acid black 10B. Simultaneously, the TiO2/PVDF fibers were found to have great reusability.