Synthesis, UV-shielding and electromagnetic wave absorbing properties of polyvinylpyrrolidone-TiO$_2$/polyacrylonitrile-SiO$_2$ nanofibre nanocomposites

[摘要] This paper reports electromagnetic interference (EMI) shielding effectiveness (SE) and UV-shielding performance of polyvinylpyrrolidone (PVP)–TiO$_2$/ polyacrylonitrile (PAN)–SiO$_2$ nanofibre nanocomposites synthesizedvia 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 (8–12 GHz) frequency at room temperature. The experimental results demonstrate excellent microwave absorption properties for all samples. PVP–TiO$_2$/PAN–SiO$_2$ nanofibres with 596.67 nm average diameter show maximum total EMI (110 dB at about 9 GHz) and 98% UV-shielding performance.

[学科分类] 材料工程

[关键词] Nanocomposites;carbon nanofibres;polymers;electrospinning;electromagnetic shielding properties.