Synthesis, UV-shielding and electromagnetic wave absorbing properties of polyvinylpyrrolidone-TiO2/polyacrylonitrile-SiO2 nanofibre nanocomposites

This paper reports electromagnetic interference (EMI) shielding effectiveness (SE) and UV-shielding performance of polyvinylpyrrolidone (PVP)-TiO2/polyacrylonitrile (PAN)-SiO2 nanofibre nanocomposites synthesized via the single nozzle co-electrospinning method. Herein, three samples with different average diameters were fabricated using 0.3, 0.4 and 0.5 ml h-1 flow rates during the electrospinning process. Morphological characterization confirmed that a core-shell structure of nanofibre nanocomposites was formed successfully. The EMI SE of the as-prepared nanofibre nanocomposites was studied using a vector network analyser over the full X-band (8-12GHz) frequency at room temperature. The experimental results demonstrate excellent microwave absorption properties for all samples. PVP-TiO2/PAN-SiO2 nanofibres with 596.67nm average diameter show maximum total EMI (110dB at about 9GHz) and 98% UV-shielding performance.