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首页> 外文期刊>Applied Surface Science >Optical properties of thin fibrous PVP/SiO2 composite mats prepared via the sol-gel and electrospinning methods
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Optical properties of thin fibrous PVP/SiO2 composite mats prepared via the sol-gel and electrospinning methods

机译：通过溶胶-凝胶法和静电纺丝法制备的PVP / SiO2纤维薄毡的光学性能

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The aim of the research was to create thin, nanofibrous composite mats with a polyvinylpyrrolidone (PVP) matrix, with the reinforcing phase in the form of silicon oxide (SiO2) nanoparticles. SiO2 nanopowder was obtained using the zol-gel method with a mixture of tetraethyl orthosilicate (TEOS, Si (OC2H5)), hydrochloric acid (HCl), ethanol (C3H5OH) and distilled water. The produced colloidal suspension was subjected to a drying process and a calcination process at 550 degrees C, resulting in an amorphous silica nanopowder with an average particle diameter of 20 nm. The morphology and structure of the manufactured SiO2 nanoparticles was tested using transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD). Then, using the electrospinning method with a 15% (weight) solution of PVP in ethanol and a 15% solution of PVP/EtOH containing the produced nanoparticles equivalent to 5% of the mass concentration relative to the polymer matrix, polymer PVP nanofibres and PVP/SiO2 composite nanofibres/SiO2 nanoparticles were produced. The morphology and chemical composition of the produced polymer and composite nanofibres were tested using a scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS). The analysis of the impact of the reinforcing phase on the absorption of electromagnetic radiation was conducted on the basis of UV-vis spectra, based on which the rated values of band gaps of the produced thin fibrous mats were assessed. (C) 2017 Elsevier B.V. All rights reserved.
机译：该研究的目的是用聚乙烯吡咯烷酮（PVP）基质创建薄的纳米纤维复合垫，增强相为二氧化硅（SiO2）纳米颗粒的形式。使用zol-gel方法和原硅酸四乙酯（TEOS，Si（OC2H5）），盐酸（HCl），乙醇（C3H5OH）和蒸馏水的混合物获得SiO2纳米粉。所产生的胶体悬浮液在550℃下进行干燥处理和煅烧处理，从而得到平均粒径为20nm的无定形二氧化硅纳米粉末。使用透射电子显微镜（TEM）和X射线衍射分析（XRD）测试了制成的SiO2纳米颗粒的形貌和结构。然后，使用静电纺丝法，将15％（重量）的PVP乙醇溶液和15％的PVP / EtOH溶液中所含纳米颗粒的含量相当于聚合物基质，聚合物PVP纳米纤维和PVP的质量浓度的5％制备了/ SiO 2复合纳米纤维/ SiO 2纳米颗粒。使用带有能量色散光谱仪（EDS）的扫描电子显微镜（SEM）测试所生产的聚合物和复合纳米纤维的形态和化学组成。在紫外可见光谱的基础上，分析了增强相对电磁辐射吸收的影响，在此基础上评估了生产的薄纤维毡的带隙的额定值。 （C）2017 Elsevier B.V.保留所有权利。

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