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首页> 外文期刊>Journal of Applied Polymer Science >Microfibers nanocomposite based on polyacrylonitrile fibers/bismuth oxide nanoparticles as X-ray shielding material
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Microfibers nanocomposite based on polyacrylonitrile fibers/bismuth oxide nanoparticles as X-ray shielding material

机译：基于聚丙烯腈纤维/铋氧化物纳米颗粒作为X射线屏蔽材料的微纤维纳米复合材料

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摘要

The main focus of the current study was to fabricate fibrous nanocomposite based on polyacrylonitrile (PAN) fibers containing Bi2O3 NPs as the X-ray shielding material. Bi2O3 NPs were synthesized based on the solid dispersion evaporation method and dispersed into PAN polymer solution with different weight concentrations. The electrospinning technique was used to fabricate nanocomposite. The morphology, surface functional group, wettability, elemental analysis, and X-ray shielding efficacy of the fabricated nanocomposite were thoroughly evaluated. The dimeter of the fibrous nanocomposites containing 10, 20, and 30 wt% Bi2O3 NPs were 1.33 +/- 0.08, 1.01 +/- 0.11, and 1.69 +/- 0.32 mu m, respectively. EDX elemental analysis showed that NPs were uniformly distributed into/onto the fibers. The X-ray shielding studies showed that the prepared nanocomposites effectively attenuate the intensity of the X-ray. The entrance surface dose for the negative control was 24.10 +/- 1.71 mSv and the application of the nanocomposites significantly reduced the entrance surface dose. The results showed NPs concentration-dependent CT number shift as the indication of X-ray protection and the highest value was obtained by 30 wt% NPs. The obtained results implied that the fabricated nanocomposites effectively attenuate the radiation and they could be applied as the X-ray shielding materials.
机译：当前研究的主要焦点是基于含有Bi2O3纳米颗粒的聚丙烯腈（PAN）纤维制备纤维纳米复合材料作为X射线屏蔽材料。采用固体分散蒸发法合成了Bi2O3纳米颗粒，并将其分散在不同重量浓度的PAN聚合物溶液中。利用静电纺丝技术制备了纳米复合材料。对所制备的纳米复合材料的形貌、表面官能团、润湿性、元素分析和X射线屏蔽效能进行了全面评估。含有10、20和30 wt%Bi2O3纳米颗粒的纤维纳米复合材料的二聚体分别为1.33+/-0.08、1.01+/-0.11和1.69+/-0.32μm。EDX元素分析表明，纳米颗粒均匀地分布在纤维上。X射线屏蔽研究表明，所制备的纳米复合材料有效地衰减了X射线的强度。阴性对照组的入口表面剂量为24.10+/-1.71 mSv，纳米复合材料的应用显著降低了入口表面剂量。结果表明，NPs浓度依赖性CT数偏移是X射线防护的指标，且当NPs含量为30 wt%时，数值最高。所得结果表明，所制备的纳米复合材料能有效地衰减辐射，可以作为X射线屏蔽材料。

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