Abstract Hybrid nanocomposites of bacterial cellulose (BC) and magnetic iron oxide nanoparticles (NPs) are of interest due to their potential for novel applications. Magnetic NPs are typically synthesized by co-precipitation since it is facile, enabling control of their size and distribution. This work investigates the effect of using different starting reactants (Fe(II) and Fe(III) salts) in the fabrication and control of the properties of BC/iron oxide nanocomposites. It was found that the choices of starting reactants are not important for synthesizing NPs outside of the BC networks. However, the starting reactants do affect the formation of NPs when they are synthesized in the BC network. Significant differences in the morphologies, sizes, crystal structures, and magnetic phases of NPs occurs when in this environment. The nanopores of BC networks in some instances force the aggregation of the NPs, either within the pores, or on the surfaces of the fibrils. Nanocomposites synthesized from Fe(II) sulfate and Fe(III) chloride were found to exhibit the highest magnetization. These nanocomposites have potential for flexible sensors, actuators, or electromagnetic shielding. Nanocomposites from Fe(II) acetate and Fe(III) chloride, though exhibiting lower magnetization, preserve a porous structure. Thus, they have potential as adsorbents or for wound healing applications.

中文翻译：

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控制共沉淀磁性细菌纤维素/氧化铁纳米复合材料的加工

摘要细菌纤维素 (BC) 和磁性氧化铁纳米粒子 (NPs) 的混合纳米复合材料因其具有新应用的潜力而受到关注。磁性 NPs 通常通过共沉淀合成，因为它很容易，能够控制它们的大小和分布。这项工作研究了使用不同的起始反应物（Fe(II) 和 Fe(III) 盐）在制备和控制 BC/氧化铁纳米复合材料的性能方面的影响。发现起始反应物的选择对于在 BC 网络之外合成 NP 并不重要。然而，当它们在 BC 网络中合成时，起始反应物确实会影响 NPs 的形成。在这种环境下，纳米颗粒的形态、尺寸、晶体结构和磁相会发生显着差异。在某些情况下，BC 网络的纳米孔迫使纳米颗粒在孔内或原纤维表面聚集。发现由 Fe(II) 硫酸盐和 Fe(III) 氯化物合成的纳米复合材料表现出最高的磁化强度。这些纳米复合材料具有用于柔性传感器、执行器或电磁屏蔽的潜力。由 Fe(II) 醋酸盐和 Fe(III) 氯化物制成的纳米复合材料，虽然磁化强度较低，但仍保持多孔结构。因此，它们具有作为吸附剂或伤口愈合应用的潜力。或电磁屏蔽。由 Fe(II) 醋酸盐和 Fe(III) 氯化物制成的纳米复合材料，虽然磁化强度较低，但仍保持多孔结构。因此，它们具有作为吸附剂或伤口愈合应用的潜力。或电磁屏蔽。由 Fe(II) 醋酸盐和 Fe(III) 氯化物制成的纳米复合材料，虽然磁化强度较低，但仍保持多孔结构。因此，它们具有作为吸附剂或伤口愈合应用的潜力。