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    盖军, 冯阳阳, 柴鹏, 颜录科, 陈涛. PVDF/TiO2电纺纤维膜在光降解和油水分离方面的应用[J]. 功能高分子学报, 2021, 34(5): 483-489. doi: 10.14133/j.cnki.1008-9357.20210112001
    引用本文: 盖军, 冯阳阳, 柴鹏, 颜录科, 陈涛. PVDF/TiO2电纺纤维膜在光降解和油水分离方面的应用[J]. 功能高分子学报, 2021, 34(5): 483-489. doi: 10.14133/j.cnki.1008-9357.20210112001
    GE Jun, FENG Yangyang, CHAI Peng, YAN Luke, CHEN Tao. Application of PVDF/TiO2 Electrospun Fiber Membrane in Photodegradation and Oil-Water Separation[J]. Journal of Functional Polymers, 2021, 34(5): 483-489. doi: 10.14133/j.cnki.1008-9357.20210112001
    Citation: GE Jun, FENG Yangyang, CHAI Peng, YAN Luke, CHEN Tao. Application of PVDF/TiO2 Electrospun Fiber Membrane in Photodegradation and Oil-Water Separation[J]. Journal of Functional Polymers, 2021, 34(5): 483-489. doi: 10.14133/j.cnki.1008-9357.20210112001

    PVDF/TiO2电纺纤维膜在光降解和油水分离方面的应用

    Application of PVDF/TiO2 Electrospun Fiber Membrane in Photodegradation and Oil-Water Separation

    • 摘要: 通过将聚偏氟乙烯(PVDF)和钛酸四丁脂(TBOT)溶解在N, N’-二甲基甲酰胺(DMF)和丙酮的混合溶剂中电纺成纤维膜(PVDF/TBOT);然后在150 °C下通过一步水热法将电纺纤维膜中的TBOT还原成二氧化钛(TiO2),制得在纤维表面和内部原位生长有TiO2的PVDF纤维膜材料(PVDF/TiO2)。采用扫描电子显微镜(SEM)、热重(TG)分析仪、X射线衍射(XRD)仪和傅里叶红外(FT-IR)光谱仪测定原位生长在PVDF纤维上的TiO2的形貌和结构;通过紫外-可见分光光谱测试复合膜对罗丹明B、甲基橙、亚甲基蓝3种有机染料的降解效果;采用重力驱动的方法分离油水混合物;通过测试复合膜对水和油的接触角来探究复合膜的油水分离效率。研究表明:复合膜对罗丹明B、甲基橙、亚甲基蓝等有机染料都有很好的降解效果,而且具有良好的亲油疏水性能,通过对四氯甲烷和水的混合物进行分离,复合膜能够有效实现油水分离,分离效率可以高达98.2%。

       

      Abstract: Polyvinylidene fluoride (PVDF) and tetrabutyl titanate (TBOT) are dissolved in a mixed solvent of N, N'-dimethylformamide (DMF) and acetone to electrospun into a fiber membrane. Then, TBOT contained in the electrospun fiber membrane was reduced to titanium dioxide (TiO2) by a one-step hydrothermal method at 150 °C. The PVDF fiber membrane material with TiO2 grown in situ on the surface and inside of the fiber was obtained. The morphology and structure of TiO2 grown on PVDF fibers in situ were determined by scanning electron microscopy (SEM), thermal gravity (TG), X-ray diffractometer (XRD) and Fourier infrared absorption spectroscopy (FT-IR). Then, the degradation effect of the composite film on the three organic dyes (rhodamine B, methyl orange and methylene blue) was tested by UV-visible spectroscopy. Finally, the gravity-driven method was used to separate the oil-water mixture, and the contact angle of the composite membrane to water and oil was tested to explore the oil-water separation effect of the composite membrane. Results show that the composite membrane has a good degradation effect on organic dyes such as rhodamine B, methyl orange, methylene blue. The composite membrane also has good lipophilic and hydrophobic properties. It is separated by a mixture of carbon tetrachloride and water. The composite membrane can effectively realize oil-water separation, and the oil-water separation efficiency can be as high as 98.2%.

       

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