Warren W Ross, LaJeunesse Dennis R
Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina Greensboro, Greensboro, NC 27401, USA.
Polymers (Basel). 2019 Oct 27;11(11):1762. doi: 10.3390/polym11111762.
Bacterial cellulose (BC) has attracted a great deal of interest due to its green synthesis and biocompatibility. The nanoscale dimension of BC nanofibers generates an enormous surface area that enhances interactions with water and soluble components within aqueous solution. Recent work has demonstrated that BC is a versatile platform for the formation of metal/metal oxide nanocomposites. Copper oxide (CuO) is a useful material to compare nanomaterial deposition on BC with other cellulosic materials because of copper's colorimetric reaction as it forms copper hydroxide (Cu(OH)) and transitions to CuO. In this research, we found that never-dried BC readily deposits CuO into its matrix in a way that does not occur on cotton, dried BC, or regenerated cellulose fibers. We conclude that hydroxyl group availability does not adequately explain our results and that intrafibrillar pores in never-dried BC nanofibers play a critical role in CuO deposition.
细菌纤维素（BC）因其绿色合成和生物相容性而备受关注。BC纳米纤维的纳米级尺寸产生了巨大的表面积，增强了与水溶液中的水和可溶性成分的相互作用。最近的研究表明，BC是形成金属/金属氧化物纳米复合材料的通用平台。氧化铜（CuO）是一种有用的材料，由于铜形成氢氧化铜（Cu(OH)）并转变为CuO时的比色反应，可用于比较纳米材料在BC与其他纤维素材料上的沉积情况。在本研究中，我们发现未干燥的BC能以一种在棉花、干燥的BC或再生纤维素纤维上不会发生的方式，轻易地将CuO沉积到其基质中。我们得出结论，羟基的可用性并不能充分解释我们的结果，未干燥的BC纳米纤维中的原纤维内孔隙在CuO沉积中起关键作用。
